Conditions: GLUT1DS1 Epilepsy Glut1 Deficiency Syndrome 1, Autosomal Recessive Glucose Metabolism Disorders Glucose Transport Defect Glucose Transporter Type 1 Deficiency Syndrome Glucose Transporter Protein Type 1 Deficiency Syndrome
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 45
Healthy volunteers: no

Brief summary:
Forty-five subjects receiving no dietary therapy with a proven G1D diagnosis will be enrolled. To evaluate the effect of C7 supplementation of a regular diet on a EEG activity in addition to IQ, language, working memory, processing speed, emotional and behavioral functioning, ataxia, and other neuropsychological and neurological performance indices in children and adults genetically diagnosed with G1D receiving a regular diet at enrollment.

Detailed description:
This is an open-label, single arm trial of orally-administered C7 in G1D. Subjects will replace a fixed percentage of their daily caloric intake (based on the results of Protocol 1) with C7 for 6 months, undergo full evaluation and discontinuation of treatment at a 6 month visit, and return for an off-treatment follow up visit 3 months after C7 oil discontinuation, for total duration of participation of 9 months. Subjects will undergo treatment initiation on a 24-hour inpatient basis. During that 24-hr inpatient treatment initiation, subjects will have continuous EEG both to monitor for real-time seizure activity (for safety) and to determine EEG changes (secondary outcome) before, during, and after treatment initiation. Subjects will undergo clinical evaluation, comprehensive blood work, ataxia scale rating, EEG, and neuropsychological testing at baseline, 6 months, and 9 months.

Arms:
arm 1: This is a single arm study.

Interventions: intervention 1: Triheptanoin
Intervention descriptions: intervention 1: . Triheptanoin will be taken 4 times per day (approximately every 6 hours: prior to breakfast, lunch and dinner and a mid-afternoon snack) by mouth. It is dosed 4 times per day, divided evenly.

Protocol document:
Prot_SAP_000.pdf: 
STUDY PROTOCOL AND STATISTICAL ANALYSIS PLAN 
 
Dietary treatment of Glucose Transporter Type 1 
Deficiency (G1D). 
 
 
NCT number:  NCT03181399 
IRB Approved date: 01-22-21 


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PROTOCOL TITLE:  
Dietary treatment of Glucose Transporter Type 1 
Deficiency (G1D) 
 
 
Protocol Number:   
Protocol 2 
 
 
Protocol Date:  
 
January 21, 2021 
 
Version:  
 
 
6 
 
Investigator Sponsor: 
Juan M. Pascual, MD, PhD 
Professor 
Director, Rare Brain Disorders Program 
Departments of Neurology and Neurotherapeutics, Physiology and Pediatrics, and 
Eugene McDermott Center for Human Growth & Development / Center for Human 
Genetics  
UT Southwestern Medical Center, Dallas, Texas 
Children’s Medical Center, Dallas, Texas 
 
Trial Site Contact Information: 
Children’s Medical Center 
Dallas Ambulatory Care Pavilion 
2350 Stemmons Freeway (I-35) 
Dallas, Texas 75207 
Tel. (214) 456-2768 
 
Clinical Laboratories: 
Jason Park, MD, PhD 
Director, Advanced Diagnostics Laboratory, Children’s Medical Center 
Assistant Professor, Pathology and Eugene McDermott Center for Human Growth & 
Development 
UT Southwestern Medical Center 
1935 Medical District Drive 
Dallas, Texas 75235 
Tel. (214) 456-2320 
 
 
 
 
 
 
  
 
 
 
 


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TABLE OF CONTENTS 
Page 
 
SYNOPSIS ..………………………………………………………………………………. 
4 
 
1. 
STUDY OBJECTIVES …………………………………………………………... 
6 
 
1.1 
Primary Objectives……………………………………………….………….. 
6 
1.2  
Secondary Objectives……………………………………………..……….. 
6 
 
2.         BACKGROUND ……………………………………………………………...….. 
6 
 
2.1 
Rationale ...…………………………………………………………………..… 
6 
2.2 
Supporting Data ……………………………….……………………………… 
8 
 
3. 
STUDY DESIGN ……………………………………………………...………….. 9 
 
4.         SELECTION AND ENROLLMENT OF SUBJECTS ……………...…………. 
10 
 
 
4.1 
Inclusion Criteria ……………………………………………………..……….. 
10 
 
4.2 
Exclusion Criteria ………………………………………………………..……. 
10 
 
4.3 
Study Enrollment Procedures ……………………………………….……… 
11 
 
5.         STUDY INTERVENTIONS …………………………………………….…………. 14 
 
 
5.1 
Interventions, Administration, and Duration ……………………….………..    14 
 
5.2 
Handling of Study Interventions …………………………………….………      15 
 
5.3 
Concomitant Interventions ……………………………………………….……. 15 
 
5.4 
Adherence Assessment ………………………………………………………... 16 
 
6.         CLINICAL AND LABORATORY EVALUATIONS ……………………………. 17 
 
 
6.1 
Schedule of Evaluations …………………………………………….…………. 17 
 
6.2 
Timing of Evaluations …………………………………………………….…… 17 
 
6.3 
Special Instructions and Definitions of Evaluations ……………….……….. 20 
 
 
7.          MANAGEMENT OF ADVERSE EXPERIENCES ...……………………...……. 31 
 
8.          CRITERIA FOR INTERVENTION DISCONTINUATION ……………...………. 32 
 
9.          STATISTICAL CONSIDERATIONS ……………………………………...…….. 32 
 
 
9.1 
General Design Issues ………………………………………………..………... 32 
 
9.2 
Outcomes ………………………………………………………………...………. 34 
 
 


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Page 
 
 
9.3 
Sample Size and Accrual …………………………………………..……….. 
36 
 
9.4 
Data Monitoring ………………………………………………………..……... 
37 
 
9.5 
Data Analyses …………………………………………………………...…….. 38 
 
10.          DATA COLLECTION, SITE MONITORING, AND ADVERSE EXPERIENCE    
               REPORTING ……………………………………………………………………... 39 
 
 
10.1 Records to be Kept ………………………………………………………..…… 39 
 
10.2 Role of Data Management ………………………………………………..…… 40 
 
10.3 Quality Assurance …………………………………………………………...… 40 
 
10.4 Adverse Experience Reporting ……………………………………………..…. 41 
 
11.          HUMAN SUBJECTS ……………………………………………………..……. 44 
 
 
11.1 Institutional Review Board (IRB) Review and Informed Consent …...….. 
44 
 
11.2 Subject Confidentiality …………………………………………………..……. 45 
 
11.3 Study Modification/Discontinuation ………………………………….…..…… 45 
 
12.          ETHICAL CONSIDERATIONS…………………………………………………. 45 
 
 
12.1 Risk/Benefit Assessment……………………………………………………….. 45 
 
12.2 Pediatric Populations…………………………………………………………… 45 
 
 
13.  
PUBLICATION OF RESEARCH FINDINGS …………………………...…….. 46 
 
14.          REFERENCES ………………………...……….................................................47  
 
 
 
APPENDICES 
 
I. 
MODEL INFORMED CONSENT ……………………………………………… 50 
II. 
NEUROPSYCHOLOGICAL SCREENING FORM ………………………….. 62 
 
 


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  SYNOPSIS 
 
Study Title 
Dietary treatment of Glucose Transporter Type 1 Deficiency (G1D) 
 
Objectives 
 
Primary Objectives: To evaluate the impact of triheptanoin (C7 oil; C7) supplementation 
on measures of neuropsychological function primarily indicative of attention in G1D 
subjects receiving normal diet. 
 
 
Secondary Objectives: 1. To evaluate the effect of C7 supplementation of a regular diet 
on a EEG activity in addition to IQ, language, working memory, processing speed, 
emotional and behavioral functioning, ataxia, and other neuropsychological and 
neurological performance indices in children and adults genetically diagnosed with G1D 
receiving a regular diet at enrolment. 2. To evaluate the safety of C7 supplementation in 
pediatric and adult subjects diagnosed with G1D on normal diet over a 6 month 
treatment period.  
 
Design and Outcomes  
 
This is a single-site, open-label, phase II trial of C7 in subjects diagnosed with the most 
common (epileptic) form of G1D, on no dietary therapy (i.e., consuming a normal diet, 
unchanged for this study other than for the replacement of some of the diet fat with C7), 
to explore the feasibility and impact of anaplerotic therapy (C7 dietary supplementation) 
in G1D using outcome measures that closely trace the disease process. The primary 
outcome measure will be attention, as measured by performance on a computerized 
neuropsychological measure as described in section 6.3.9. Attention is a core cognitive 
function that permits access to other areas of cognition and is commonly impaired in 
association with seizure disorders. Existing research has indicated that dietary 
interventions have the potential to promote attention functioning in children with G1D 
(26, 27). The secondary outcome measures are: 1. Changes in other aspects of 
neuropsychological (IQ, language, working memory, processing speed, emotional and 
behavioral functioning) and neurological performance, including ataxia and global 
impression scales. 2. EEG changes (as precisely defined below) during C7 treatment. 3. 
Safety of 6 month supplementation with C7 as measured by the absence of clinically 
significant changes in standard laboratory measures (blood cell count, blood 
electrolytes, AST, ALT, blood urea nitrogen, creatinine, lipid panel, plasma glucose and 
Beta-hydroxybutyric acid). 
 
Interventions and Duration 
 
This is an open-label, single arm trial of orally-administered C7 in G1D. Subjects will 
replace a fixed percentage of their daily caloric intake (based on the results of Protocol 
1) with C7 for 6 months, undergo full evaluation and discontinuation of treatment at a 6 
month visit, and return for an off-treatment follow up visit 3 months after C7 oil 
discontinuation, for total duration of participation of 9 months. Subjects will undergo 


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treatment initiation on a 24-hour inpatient basis. During that 24-hr inpatient treatment 
initiation, subjects will have continuous EEG both to monitor for real-time seizure activity 
(for safety) and to determine EEG changes (secondary outcome) before, during, and 
after treatment initiation. Subjects will undergo clinical evaluation, comprehensive blood 
work, ataxia scale rating, EEG, and neuropsychological testing at baseline, 6 months, 
and 9 months. 
 
Important: As described in the Proposal and in (1), C7 is always administered as a 
replacement (nor as a source of extra calories for an otherwise unchanged regular diet) 
to a fraction of the daily calories that are normally consumed by each subject via other 
nutrients. As such, there is no caloric impact of C7 (i.e., the calories that a subject will 
consume remain unchanged by the addition of C7 to the diet to replace other nutrients – 
predominantly fat).  
 
Sample Size and Population 
 
Forty-five subjects receiving no dietary therapy (i.e., consuming a normal diet) with a 
proven (genetically determined) G1D diagnosis will be enrolled. Subjects may be male 
or female, between the ages of 2 and 35 years old (N=15 per age group: 2 to 6, 7-11, 
and 12-35 years old), and must be willing to provide assent if they are of age 10-17. 
Subjects may be English or Spanish speaking. Subjects may be currently taking 
anticonvulsants or other medications. Subjects must agree not to change their dietary 
therapy during the trial without consulting with the study team. Subjects must have 
evidence of abnormal EEG in the last 36 months. 
 
1. STUDY OBJECTIVES 
 
1.1. 
The main hypotheses tested are:  
 
• C7 positively affects neuropsychological indices (sustained attention, IQ, 
language, working memory, processing speed, emotional functioning, 
adaptive behavior functioning, and quality of life indicators) and neurological 
performance, such as ataxia, in G1D. 
 
1.2. The secondary hypotheses tested are: 
 
• C7 provides a spectrum of short-term (hours to days) and long-term (over 6 
months) benefits in subjects with G1D, defined as a decrease in abnormal 
EEG activity both in the acute and long-term, as measured by the change in 
EEG from pre-C7 baseline. These changes in EEG activity are defined and 
measured as specified below. 
• C7 supplementation is safe when used over a long term (6 months), as 
measured by the absence of clinically significant changes in standard 
laboratory measures (blood cell count, blood electrolytes, AST, ALT, blood 
urea nitrogen, creatinine, lipid panel, plasma glucose, and beta-
hydroxybutyric acid). 
 


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2. BACKGROUND 
 
2.1. 
Rationale 
 
Glucose transporter deficiency type 1 (G1D), a prototypic glycolytic defect that 
impairs the first step of glucose metabolism, was first described in 1991 and is 
caused by haploinsufficiency of the blood brain barrier and astrocyte glucose 
transporter (2-4). In its most common form, G1D leads to epilepsy and 
intellectual discapacity. Associated features include microcephaly (signifying 
limited brain growth) and movement incoordination (ataxia). There is no known 
alteration of systemic carbohydrate metabolism.  
 
Some manifestations of G1D are treatable in a significant fraction of patients: In 
~2/3 of over 100 subjects that we have cared for over the years, a ketogenic diet 
has been efficacious for seizure control but without significantly impacting 
intellectual discapacity or ataxia ((5) and PI observations). Therefore, G1D is at 
least partially responsive to the alternative fuels generated by the diet in a 
fraction of patients, namely even-carbon-number fatty acids and ketone bodies 
(3). We currently care for well over 100 G1D genetically-confirmed subjects, 
representing ~40% of all North American and ~10% of European subjects either 
reported or genotyped (often by us (6) under our NIH CETT Program for G1D) 
and we have elucidated the principal brain metabolic pathways in G1D (7). 
Although much work remains to be carried out to fully understand the 
biochemistry of the disorder, significant progress has been made in G1D, such 
that we believe that the finding of enhanced anaplerosis after administration of 
the C7 constituent heptanoate and related indicators of tricarboxylic acid (TCA) 
cycle stimulation (8) warrants the trial of anaplerotic therapy at this time in this 
disease. An additional sense of urgency is imposed by the potential window of 
opportunity that closes once the child brain matures. 
 
We have established the dosing, tolerability, and safety profile of triheptanoin in 
adults in a broad variety of inherited carbohydrate and lipid metabolic disorders 
(of which G1D is a part) (9-13) (FDA IND 59303: “Dietary therapy for inherited 
disorders of mitochondrial fat oxidation, glycogenoses and mitochondrial 
myopathies”, responsible investigator Dr. Charles Roe and subsequent 
expansion to “glycolytic defects” and cross-referencing with responsible 
investigator Dr. Pascual). The C7 triglyceride has no discernible effects on 
normal metabolism as assessed by comprehensive analytical methods. 
However, this has not been sufficiently replicated in G1D. The goal of the 
accompanying Protocol 1 is thus to determine the maximum tolerable dose 
(MTD) and safety profile of triheptanoin in pediatric G1D patients. While there are 
no significant natural sources of triheptanoin or odd-carbon number fatty acids in 
nature, triheptanoin is available commercially for cosmetic and food industry 
applications. C7 is a colorless and tasteless oil.  
 


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Forty-five subjects with G1D and currently receiving no dietary therapy diet will 
participate. After baseline measurements of common blood work analytes, 
neuropsychological performance, EEG, blood ketone body levels, blood 
anaplerotic precursor levels and neurological performance, subjects will be given 
triheptanoin at the MTD (i.e., dosed by individual daily caloric intake), divided in 4 
daily fractionated doses.  
 
 
All subjects will take triheptanoin daily for 6 months. Subjects will return for 
clinical evaluations, repeat blood work, and neuropsychological testing at this 
time point, will be discontinued from the oil at this visit, and returned to their usual 
diet. Subjects will also repeat EEG at this visit. At 3 months after oil 
discontinuation, subjects will return for a final clinical evaluation, blood work, 
EEG, and neuropsychological testing. 
 
Rationale for attention functioning as primary outcome: Attention is a core 
cognitive function that permits access to other areas of cognition and is 
commonly impaired in association with seizure disorders. Existing research has 
indicated that dietary interventions have the potential to promote attention 
functioning in children with G1D (26, 27). With regard to long-term outcomes, 
research in the field of childhood absence epilepsy has shown that even after 
attaining seizure freedom, attention deficits may remain (28). In other words, 
even normal EEG findings may not correspond to functional neuropsychological 
improvements. These findings in the field of childhood absence epilepsy are 
significant for the present study given that EEG seizures are more common than 
observable seizures in children with G1D. Again, attention is a core cognitive 
function that permits access to other areas of cognition (including language) and 
is commonly impaired in association with seizure disorders. For all of these 
reasons, attention functioning as measured by neuropsychological testing 
(described below in 6.3.9) may be a more relevant primary outcome for the 
present study than EEG findings. Precedent for neuropsychological ratings as a 
primary outcome in epilepsy exists. For example, see 
https://clinicaltrials.gov/ct2/show/NCT02127918  
 
Rationale for EEG as secondary outcome: As explained below, EEG seizures 
in G1D (which are generally defined clinically in idiopathic absence epilepsy as a 
generalized spike-wave episode lasting over 3.0 s) are more frequent than 
observable seizures (see also (1) for details) and improvement in EEG outcome 
(as independently defined for that article) was correlated with 1) improved 
language functioning, 2) improved cerebral metabolic rate for some subjects, 3) 
improved quality of life as demonstrated by patient and caretaker reports (see the 
proposal for details). Thus, EEG is potentially a clinically meaningful outcome 
that may correlate with patient benefit and disease burden reduction (1).  
 
This study will define meaningful outcome measures for G1D. Based on 
preliminary evidence, C7 oil therapy may improve important symptoms of G1D 
(seizures, ataxia, and neurocognitive deficits). Moreover, in contrast to the strict 
and often unsatisfactory ketogenic diet commonly used for G1D, addition of C7 to 


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a regular diet represents a simpler treatment that may facilitate compliance, and 
potentially lead to improved outcomes. Additionally, due to the differential 
metabolic effects of C7 relative to the ketogenic diet, there is potential for greater 
neurological and cognitive benefits to subjects than with the ketogenic diet alone. 
 
Establishing long-term safety and tolerability of C7 in children is critical, as many 
epilepsies manifest in childhood and can negatively impact brain development. 
By providing a treatment in early childhood, it may be possible to avoid the 
deleterious effects of chronic, medication-refractory seizures in G1D patients. 
 
2.2 Supporting Data 
 
There is evidence of beneficial effects of C7 metabolism on the TCA cycle G1D 
(8). This evidence stems from our work in the G1D mouse model via 13C nuclear 
magnetic resonance (NMR) spectroscopy and mass spectrometry. Open-label 
treatment using triheptanoin has been pioneered by us and others in several 
disorders characterized by impaired anaplerosis (9, 11, 12, 14), proving safe, 
tolerable and efficacious. 
 
C7 dosing will adhere to the MTD determined in Protocol 1. The dosing, 
tolerability, and safety profile of triheptanoin has been documented in other 
disorders (9, 11, 12, 14). Therapeutic response is seen at 35% of the daily caloric 
needs supplied by C7 oil, and 14 years of experience administering C7 has 
elicited no serious adverse events. However, side effects of stomach upset/ 
diarrhea, nausea, and mild weight gain have been observed. Because C7 oil is a 
fat, it is possible that subjects will experience changes in lipid levels, cholesterol, 
and triglycerides, but these changes have not been observed.  
 
3. STUDY DESIGN 
 
This is an open-label, phase II trial of C7 in subjects with G1D.  
 
Forty-five subjects with G1D receiving a modified atkins diet or a normal diet will 
be enrolled. Subjects will undergo all baseline and follow-up clinic procedures in 
the Neurology Outpatient Clinic located in the Children’s Medical Center 
Ambulatory Care Pavilion. Inpatient procedures including blood draws will be 
completed in the Children’s Medical Center Epilepsy Monitoring Unit (EMU). 
These facilities can accept adults as well as children subjects. 
  
Evaluation of outcome measures will be accomplished at the pre- and post-
baseline assessments, 6 month post-treatment and 9 month off-treatment time 
points by comparing baseline, post-treatment, and endpoint measures. Analyses 
of changes in comprehensive blood work and side effects over time will help 
ensure further safety and tolerability of C7 oil at the specified dose; improvement 
in ataxia rating scale, EEG, clinical evaluation, and neuropsychological testing 
will confirm the use of the clinical measures to assess outcomes.  


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Neuropsychological testing at the 6-month time point is designed to capture 
changes in neuropsychological functioning secondary to oil treatment.  Testing 
again at the 9-month time point is designed to assess whether those changes 
persist for at least the short term (3 months after discontinuation of C7 oil).  Most 
of the measures have alternate forms that may be utilized to minimize practice 
effects between the 6-month and 9-month time points, or they have shown not to 
demonstrate practice effects over a 3-month timeframe. As the IQ measures do 
not have alternate forms and likely are more sensitive to practice effects over that 
3-month timeframe, we will not be conducting a 6-month administration of those 
measures in order to obtain an optimally valid estimate of intellectual functioning 
at the 9-month time point. 
 
To address the potential circumstance that C7 may be associated or coincide 
with an increase in clinical seizure frequency between visits, an additional 
optional procedure will include the performance of a routine outpatient clinical 
EEG. This procedure will be obtained and reported locally (i.e., in the area of 
patient residence) in an accredited clinical facility and the report forwarded to the 
M.D. investigators for decision and intervention as detailed below.    
 
4. SELECTION AND ENROLLMENT OF SUBJECTS 
4.1. 
 Inclusion Criteria 
4.1.1. Diagnosis of glucose transporter type I deficiency (G1D), confirmed by 
clinical genotyping at a CLIA-certified laboratory or by PET scan.  
4.1.2. Stable diet on either a modified Atkins diet or on no dietary therapy (i.e., 
no dietary therapy for 1 month). 
4.1.3. Males and females 24 months to 35 years old, inclusive. 
4.2. 
 Exclusion Criteria 
4.2.1. Subjects with evidence of independent, unrelated metabolic and/or genetic 
disease. 
4.2.2. Subjects with a chronic gastrointestinal disorder, such as irritable bowel 
syndrome, Crohn’s disease, or colitis that could increase the subject’s risk 
of developing diarrhea or stomach pain. 
4.2.3. Subjects with a BMI (body mass index) greater than or equal to 40.   
4.2.4. Subjects currently on dietary therapy (i.e., ketogenic diet, medium chain 
triglyceride-supplemented diets, Atkins diet, and low glycemic index diet.). 
4.2.5. Subjects with no evidence of abnormal EEG (spike-wave discharges). 


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4.2.6. Women who are pregnant or breast-feeding may not participate. Women 
who plan to become pregnant during the course of the study, or who are 
unwilling to use birth control to prevent pregnancy (including abstinence) 
may not participate. Females age 10 and over will be asked to provide a 
serum or urine sample for a pregnancy test via dipstick. Subjects will be 
asked to agree to abstinence or another form of birth control for the 
duration of the study. 
4.2.7. Allergy/sensitivity to C7. 
4.2.8. Previous use of triheptanoin in the past 1 month. Subjects who participate 
in Protocol 1 of this study are thus eligible. 
4.2.9. Subjects exhibiting signs of dementia, or diagnosed with any 
degenerative brain disorder (such as Alzheimer’s disease) that would 
confound assessment of cognitive changes, in the opinion of the 
investigator.  
4.2.10. Active drug or alcohol use or dependence that, in the opinion of the 
investigator, would interfere with adherence to study requirements. 
4.2.11. Inability or unwillingness of subject or legal guardian/representative to 
give written informed consent, or assent for children age 10-17. 
4.2.12. Addition of a new antiseizure drug in the previous 3 months. 
4.3. 
Study Enrollment Procedures 
4.3.1. Recruitment 
Dr. Pascual is the Director of the Rare Brain Disorders Program at UT 
Southwestern Medical Center and Children’s Medical Center Dallas. This clinic 
currently provides care for approximately 100 confirmed G1D subjects from 
around the United States. Dr. Pascual’s current subjects will be contacted by Dr. 
Pascual to determine interest in participating in this research. Our experience 
has been that, due to the childhood manifestations of this disease, the chronic 
nature of symptoms, and the difficulty in finding effective treatments, these 
families and subjects are particularly eager for clinical trial opportunities. Our pilot 
study of G1D (1), which was conducted to establish the feasibility of a similar 
protocol as well as providing other preliminary data, recruited 14 subjects in 15 
days and had to decline as many as twice that number of interested subjects who 
made contact just after recruitment was complete.  
In addition, Dr. Pascual maintains a strong collaborative relationship (Medical 
Advisory Board chair) with the Glut1 Deficiency Foundation, the leading 
community-based patient advocacy  501(c)(3) organization dedicated to 
supporting research in G1D (see Letter of Support). Dr. Pascual is an invited 
speaker to their annual meeting, and the G1D Foundation has expressed its 


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willingness to support and promote our research efforts through their community 
boards and newsletters.  
Information regarding the trial will also be posted on the ClinicalTrials.gov and UT 
Southwestern websites, the latter of which includes a searchable database for 
current trials ongoing at UT Southwestern. 
An additional recruitment tool is our web-based, patient-generated G1D patient 
registry (www.G1DRegistry.org). The registry is an IRB-approved, HIPAA-
compliant comprehensive, inclusive questionnaire that captures all relevant 
aspects of G1D natural history and therapies. The registry, which has been 
accessible for 1 ½ years now, is housed in the UT Southwestern servers that 
contain the medical center medical records and currently has over 200 unique 
enrollees. 
4.3.2 Screening Log and Enrollment 
We anticipate enrolling approximately 1-2 subject(s) every month for 44 months 
(months 14-44). Because this study is resource intensive due to the inpatient 
stay, enrollment at a rate greater than 1-2 per month is not feasible for personnel 
and resource availability. This enrollment rate allows for flexibility in scheduling 
the Epilepsy Monitoring Unit (EMU) with these research patients. 
A screening log will be maintained in an Excel spreadsheet, documenting how 
subjects learned about the trial (Dr. Pascual, community group, clinicaltrials.gov, 
etc.), who referred them to the trial, the reasons for ineligibility (if applicable), and 
the reasons for nonparticipation of eligible subjects. The research coordinator will 
meet with Dr. Pascual at the end of each clinic day to confirm eligible and 
ineligible subjects seen during the day. The research coordinator will be 
responsible for screening the designated secure UT Southwestern email 
account, contacting interested subjects, and logging which subjects qualify and 
which subjects do not and why. All of these procedures are in place and have 
been successfully used by us for (1). 
Enrollment will open in month 14, although screening will begin prior to this 
month in order to schedule appointments immediately. We anticipate reaching 
25% enrollment for this study in month 20, 50% enrollment in month 27, 75% 
enrollment in month 35, and 100% enrollment in month 44.  
Recruitment will be monitored monthly. If recruitment goals fail to be met within 
the first 6 months of opening enrollment, the recruitment log will be analyzed to 
clarify the reasons for lack of enrollment, and these reasons will be addressed if 
possible. In our experience, this population is eager for research studies and very 
willing to participate, even traveling from several states away and Canada to 
participate in research.  
If we have not met recruitment goals, we have several steps in place to improve 
recruitment. 


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1.    We will utilize our G1D Registry, which includes a patient-agreed clause to 
inform registered patients about clinical research, and reach out these patients if 
they have not been enrolled. This process will take approximately 1-2 weeks, and 
we will re-evaluate recruitment, based on scheduled visits, after 4 weeks. 
2.     If recruitment is still lagging, or we have exhausted available patients in the 
registry, we will work with the Glut1 Deficiency Foundation. Per the FOA, 
researchers are encouraged to work with and engage patient groups. We have 
worked with the Glut1 Deficiency Foundation in various capacities over the past 
several years and maintain an excellent working relationship with them (See 
Letter of Support), including making their broad patient base regularly aware of 
our research. The Glut1 Deficiency Foundation will send an email to members 
with information regarding the trial, and encourage interested families to contact 
us if desired. This process will take 1-2 weeks, and recruitment will be re-
evaluated after 4 weeks, based on scheduled visits. 
3.     Finally, if we still experience a lack of patients, we will reach out to the G1D 
Research Consortium (G1DRC; which is not contributing support letters because 
the Consortium is not part of this proposal), which we have established for the 
broad purpose of clinical investigation and patient information. There are 
currently 10 U.S. institutions in the consortium, which cover virtually all densely 
populated areas of the U.S. The relationship with Consortium members is 
excellent, as, even before the Consortium was formed, members had previously 
referred to us a total of 36 G1D patients for specialized neurological consultation.  
In addition, if enrollment is slower than anticipated, it is within the scope of this 
research to allow an additional 6 months to enroll (months 45-50). See Protocol 
Timeline below. 
Protocol Timeline 
 
4.3.3. Consent and Assent Procedures 
Subjects will be asked to verify basic eligibility for the trial prior to enrollment 
(age, diagnosis, if they currently are on dietary therapy) and to provide a copy of 
their current medical record at the time of enrollment, if they choose to 


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participate. Interested subjects will be securely emailed a copy of the consent 
prior to their enrollment appointment. The Rare Brain Disorders Program 
maintains a dedicated secure email address 
(Rare.Diseases@UTSouthwestern.edu) for correspondence with current and 
prospective subjects and research participants. Interested patients may ask any 
questions via this email, or arrange a phone conversation to answer questions 
prior to traveling to Dallas for enrollment. Dr. Pascual or M.D. co-investigator will 
consent the subjects in a private exam room. Each aspect of the trial will be 
thoroughly explained to the legal guardian and subject. Time will be allowed for 
questions to be asked. The physician will explain that participation is voluntary, 
the decision not to participate does not affect the quality of their standard of care 
treatment with the physicians, and subjects may withdraw from the study at any 
time. Subjects age 10 to 17, inclusive, will be asked to sign the assent form, and 
a legal guardian will be asked to sign the consent form. Subjects under the age 
of 10 are not required to sign assent. The subject’s legal guardian will be asked 
to sign the consent form for these subjects. 
Subjects and legal guardians will also have the HIPAA Authorization for 
Research explained to them, and again any questions will be answered. The 
subject’s legal guardian will be asked to sign the HIPAA form. 
Subjects and their legal guardians will receive a signed copy of both the consent 
form and the HIPAA Authorization form. One copy will be placed in the research 
folder, and one copy will be placed in the subject’s medical record. 
Subjects and their legal guardians will also be able to consent to the study via 
Redcap or by email. 
4.3.4. Group Assignment 
 
This is an open-label study; there is no group assignment. 
5. 
STUDY INTERVENTIONS 
5.1. Interventions, Administration, and Duration 
5.1.1. Triheptanoin: A triglyceride oil containing three odd-carbon chain-length 
fatty acids (i.e., a triglyceride of 7-carbon heptanoic acid) manufactured for 
food applications. Triheptanoin will be taken 4 times per day 
(approximately every 6 hours: prior to breakfast, lunch and dinner and a 
mid-afternoon snack) by mouth. It is dosed 4 times per day, divided 
evenly. Subjects will receive supplementation at the maximum tolerable 
dose (MTD) determined in Protocol 1 (either 35%, 40%, or 45% of daily 
caloric intake).  Subjects who experience acute gastrointestinal distress 
(nausea, mild stomach upset, mild diarrhea) may decrease the dose to 
50% for two days, then increase the dose over the course of less than a 
week (in a manner similar to what is described in Protocol 1) until they 
reach the intended dose. Subjects who are unable to tolerate the 
maximum tolerable dose will be discontinued from the study. The oil 


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should be taken approximately one hour before meals, and will be mixed 
with fat-free, sugar-free yogurt or pudding for administration.  
5.1.2. Forty-five subjects will be enrolled in a 6 month on/3 month off treatment 
trial of triheptanoin. Initiation of triheptanoin will be done in the Children’s 
Medical Center Dallas Epilepsy Monitoring Unit. 
5.1.3. Subjects will not be required to stop other medications. Subjects will be 
directed to maintain their usual medications, including rescue seizure 
medications, as necessary for the course of the study. Subjects may have 
any clinical medical records transferred back to their referring physician at 
completion of the study. 
5.1.4. Side Effects: 14 years of experience with C7 diet therapy in children and 
adults (including our 14 G1D subjects (1), and a larger group of patients 
with fatty acid oxidation defects) has failed to reveal any dangerous or 
permanent adverse effects (9, 11, 12, 14). However, subjects may 
experience mild gastrointestinal upset or stomach pain, and mild diarrhea 
(1). Both of these side effects are usually resolved by lowering the initial 
dose of oil by one-half and gradually titrating up to the required dose. In 
addition, subjects who do not follow the recommendations to reduce other 
fat intake in their diet may experience weight gain. Careful monitoring of 
fat and calorie intake has effectively reversed the weight gain. The data 
indicate no adverse effects on normal metabolism. A side effects 
questionnaire will be used to track any self-reported side effects. Patient 
safety information will be updated, if necessary, after completion of this 
trial. 
5.2. Handling of Study Interventions 
5.2.1. Triheptanoin will be purchased from 1) Stepan Lipid Nutrition 
headquartered in Maywood, New Jersey, where the company has also a 
production facility. The oil is supplied in 25 kg containers under a current 
Material Transfer Agreement (see Letter of Support), and/or 2) CKM 
Corporation headquartered in Racine, Wisconsin with the production 
facility in Racine, Wisconsin. 
5.2.2. Stepan Lipid Nutrition and/or CKM Corporation will distribute the oil to the 
Investigational Pharmacy Services (IPS) at Children’s Medical Center. The 
pharmacists at the IPS will package the oil for each subject based on oil 
weight, and provide enough oil for the duration of the study plus a 5% 
overage to account for spillage and adjustments in dosage. The packaged 
oil will be given to the research personnel for shipping to the families via 
FedEx Appointment Home Delivery. This method of delivery provides a 
confirmed time of delivery and requires an adult signature for delivery. 
This is a three day shipping time. Subjects will be provided a 4 day supply 
of C7 oil upon discharge to ensure they have enough to last until the 
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5.3. Concomitant Interventions 
 
5.3.1. Required Interventions: There are no additional required interventions. 
 
5.3.2. Prohibited Interventions: Subjects are prohibited from starting or changing 
dietary therapy or other oil-based dietary modifications (including 
ketogenic diet or medium chain triglyceride therapy) while on study 
protocol. Subjects who feel this change is necessary will be withdrawn 
from the study for their own protection.  
 
5.3.3. Precautionary interventions: Dr. Pascual or M.D. co-investigator may 
direct subjects to adjust the dosing of their oil if necessary for tolerability. If 
subjects experience acute gastrointestinal distress by self-report during 
treatment initiation, the amount of oil administered will be decreased to 
50% of the dose for 2 days, then gradually increased over less than a 
week until the desired dose is reached. Subjects who are unable to 
tolerate the maximum tolerable dose of oil will be discontinued from the 
trial. If subjects experience gastrointestinal distress during the 6 months of 
treatment (post treatment initiation), the amount of C7 oil will also be 
decreased as above. Subjects unable to tolerate a return to the required 
dose will be discontinued from the study. A dietician will also be available 
to provide nutritional counseling for subjects who are having difficulties 
adjusting to the oil, as experience has shown that mixing the C7 oil with an 
emulsifier, such as yogurt, and other simple dietary interventions can 
effective and permanently improve tolerability (based on our previous 
experience with G1D (1)). 
 
5.3.4. Drug treatments during C7 consumption: G1D patients will generally not 
need to change any concomitant drug treatment as part of this study. 
Such changes may be initiated by outside local neurologists or by M.D. 
investigators in this study and prompted by increase seizure frequency or 
unexpected drug toxicity. While participants will be screened for a stable 
drug regimen (see Exclusion Criteria) and recognizing that changes in 
such therapy may occur, the following scenarios will be entertained: 
5.3.4.1. 
No change in type of drug treatment is the planned study conduct. 
It is likely that this plan will be followed by all subjects because, in clinical 
practice, the withdrawal of an antiseizure drug on a given patient is 
usually evaluated only at 2-year intervals, which exceeds the duration of 
this Protocol. Modest (10-25% dose) changes will be allowed per 
standard clinical practice in rapidly growing (young) children, whose 
weigh normally increases on a monthly basis. These children will thus 
continue to be treated per standard pediatric neurological practice. 
5.3.4.2. 
Addition of a new antiseizure drug. This will be prompted by 
increased seizures and is equivalent to C7 failure. 
 
 


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5.3.4.3. 
Discontinuation of an antiseizure drug. This will be prompted by 
drug adverse events and recorded as such (as outlined below). Such 
events are very unlikely in patients who have been receiving a stable 
drug regimen (see Exclusion Criteria).  
 
5.4. Adherence Assessment: The coordinator will call subjects and families once a 
month to determine adherence (by self-report), remind subjects to go in for the 
month two lab draw if not already done, and assess amount of oil remaining, and 
will prompt and procure an answer to any questions that the family may have. If 
any subjects are having trouble as reported during a call, Dr. Pascual or M.D. co-
investigator will be notified and a written plan of action will be developed. 
Additionally, a nutritional consult will be completed to determine if the C7 dose is 
still correct. If the subject’s caloric intake has changed significantly enough to 
require a change in the amount of C7 needed, the dietician will consult with PI or 
M.D. co-investigator, who will contact the family to provide directions for the dose 
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6. CLINICAL AND LABORATORY EVALUATIONS 
6.1. Schedule of Evaluations 
 
 
6.2. Timing of Evaluations 
1Optional 
6.2.1. Pre-Entry Evaluations 
 
6.2.1.1. 
Screening  
 
In order to evaluate subjects’ eligibility to participate prior to traveling to Dallas, a 
waiver of informed consent will be obtained only for the purposes of obtaining 
information regarding age, diagnosis, height, weight, and current dietary therapy. Once 
  
  
Visit 1*  
Pre-Entry and Entry  
Monthly 
Phone Calls 
Visit 2 (±7 days) 
6 mo. on-oil 
Visit 3 (±7 days) 
3 mo. off-oil 
Evaluation 
Screen 
-1 month 
Day 1 
Pre-Entry 
and Entry 
Day 2 
Entry  
Months 1-5 
Day 1 
On oil 
Day 2 
Off oil 
Day 1 
Day 2 
Informed Consent 
  
X 
  
  
  
  
  
  
Documentation of 
Disease/Disorder 
X 
X 
  
  
X 
  
X 
  
Medical/Treatment 
History 
X 
X 
  
  
X 
  
X 
  
Clinical Assessment 
  
X 
  
  
X 
  
X 
  
Targeted Physical 
Exam 
  
X 
  
  
X 
  
X 
  
Ataxia Scale 
  
X 
  
  
X 
  
X 
  
Clinical Global 
Impression 
  
X 
  
  
X 
  
X 
  
Side Effect 
Assessment 
  
X 
  
X 
X 
  
X 
  
Pregnancy Testing 
  
X 
  
  
 X  
  
  
  
Neuropsychological 
tests  
  
X 
 X 
  
X 
 
X 
 
Nutritional 
Assessment 
  
X 
  
X 
X 
  
X 
  
Seizure Count 
  
X 
  
X 
X 
  
X 
  
Inpatient 
  
Admit: 
Noon 
D/C: 
Noon 
  
Admit: 
Noon 
D/C: 
Noon 
Admit: 
Noon 
D/C: 
Noon 
Continuous EEG 
  
X 
X 
  
X 
X 
 X 
X 
Laboratory 
Evaluations: 
Hematology, 
Chemistry on Day 1 
or Day 2 
  
 X 
X 
X 
X  
X 
X  
X 
Blood collection to 
measure C7 
ketones1 
 
X 
X 
 
X 
X 
 
 
Triheptanoin  
Supplementation 
  
 
Start 
  
  
End 
  
  


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the subject’s basic eligibility has been confirmed, the subject will be scheduled a 
screening visit in order to be consented and to continue the screening process. We will 
request that subjects keep a seizure log for one month prior to their screening visit. 
This information will be collected from the subject on the completion of the consent 
process. Keeping a month long seizure log does not differ from standard of care. A 
month long seizure log is normally requested of all subjects whether or not they are 
participating in a research study.   
 
After signing the informed consent, subjects will finish the screening for study eligibility. 
All screening evaluations to determine eligibility must be completed within one day 
prior to study entry. Screening and pre-entry evaluations may occur concurrently. All 
screening activities are consistent with standard of care. Screening includes 
documentation of diagnosis, medical history, and pregnancy testing if appropriate. 
 
6.2.1.2. 
Pre-Entry Day 1 
 
The first day of the subject’s visit is Pre-entry Day 1. Pre-entry assessments consist of 
clinical assessment, targeted physical exam, ataxia rating, clinical global impression, 
side effect assessment, pregnancy testing if appropriate, and a seizure count. 
Neuropsychological testing will be conducted in the afternoon of the same day.  
6.2.2. On-Study/On-Intervention Evaluations 
6.2.2.1. 
Entry Day 1-2 
Subjects will be admitted for a 24 hour inpatient stay for treatment initiation and 
monitoring. Entry evaluations will be done within a day of pre-entry and consist of a  
blood draw to evaluate hematology, blood chemistry, and lipid panel.  We will also 
obtain 3 mL of blood that is left over from the samples above (if available) or draw an 
additional 3 mL of blood to measure C7 ketones. The collection of this blood for 
measurement of ketones is optional.  A continuous EEG will be completed on subjects 
over the 24 inpatient stay. 
 
 
Subjects will be started on-intervention on the morning of Day 2 after they fast 
overnight. We will draw an additional 3 mL of blood to measure C7 ketones. The 
collection of this blood for measurement of ketones is optional. Subjects will be started 
on C7 oil at the maximum tolerable dose from Protocol 1, a percentage of age-
dependent individual daily caloric intake, divided into 4 doses per day. Subjects will be 
maintained on continuous EEG for 4-6 hours after the initial C7 administration, then be 
discharged from their inpatient stay. Subjects will undergo neuropsychological testing 
on the afternoon of Day 2, ending Visit 1. 
 
6.2.2.2. Months 1-5 
 
Each month between Visit 1 and 2, the research coordinator will contact each family to 
evaluate adherence and tolerability. Additionally, at month two each subject will 
complete safety blood work at a local CLIA-certified clinical laboratory and have the 


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results returned to PI at UT Southwestern Medical Center. Every effort will be made to 
ensure adherence to the protocol: Subjects who do not comply with the month two 
blood draw (i.e., those who submit blood work results 10 days or later past the due 
date) will receive extra guidance via telephone and secure email. The maximum 
tolerable period for result submission delay is 30 days, after which subjects will be 
evaluated for termination or, if extenuating circumstances have occurred, may have the 
delivery of oil delayed until they return to compliance with the protocol. Subjects 
determined to exhibit greater propensity to delays in the opinion of the research team 
will receive pre-emptive anticipatory guidance before each blood draw due date and 
help with local phlebotomy scheduling. 
 
Contingency plans for any pro-epileptogenic effects of C7: This is extremely unlikely 
since C7 is fully consumed in the TCA cycle as a metabolic fuel source and experience 
with C7 has failed to show any adverse events, including epilepsy. The EEG in G1D 
shows preprandial spike-waves in the majority of patients regarding of apparent clinical 
seizure control, thus providing an individual baseline. To address the potential 
circumstance that C7 may be associated or coincide with a significant increase in 
clinical seizure frequency between visits, study exit will be considered. An additional 
optional procedure will include the performance of a routine outpatient clinical EEG. 
This procedure will be obtained and reported locally (i.e., in the area of patient 
residence) in an accredited clinical facility and the report forwarded to the M.D. 
investigators for the following decisions and interventions after clinical comparison with 
previous patient EEGs. If the new EEG is deemed significantly more abnormal following 
clinical neurophysiological evaluation by a board-certified pediatric epileptologist, C7 
cessation will be followed by study exit procedures. 
 
6.2.3. Intervention Discontinuation Evaluations 
Subjects will return for a discontinuation visit at 6 months after initiation of treatment. 
Subjects undergo the same set of evaluations completed at enrollment. Subjects will 
complete a medical history, clinical visit, physical exam, pregnancy test if appropriate, 
and neuropsychological testing on the first day of the visit. Subjects will undergo a 24 
hour inpatient stay with continuous EEG to capture EEG recordings in all states: non-
fasting/on oil; fasting/on oil; fasting/off oil; and fasting/on oil. On day 1 or day two, 
subjects can have  blood drawn to evaluate hematology, chemistry, and lipid panel. We 
will also obtain 3 mL of blood that is left over from the samples above (if available) or 
draw an additional 3 mL of blood to measure C7 ketones. The collection of this blood for 
measurement of ketones is optional. Subjects will be administered a final dose of oil on 
the morning of Day 2 for the purposes of fasting, on oil EEG. At that point, they will be 
discontinued from the oil and discharged from the inpatient stay.  
If subjects wish to discontinue the oil before 6 months, we will ask them to return for a 
discontinuation visit as soon as feasible and remain on the oil until they return. If 
subjects wish to discontinue due to intolerable side effects, they will be permitted to do 
so, and asked to return for a final visit as soon as feasible. Many of our patients come 


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from out of town, and it could potentially be a matter of weeks to a month before a 
return visit is possible. Subjects will complete a medical history, clinical visit, physical 
exam, pregnancy test, and neuropsychological testing on the first day of the exit visit. 
On day one or day two, subjects will complete a fasting blood drawn to evaluate 
hematology, chemistry, lipid panel, and specialized metabolites. We will also obtain 3 
mL of blood that is left over from the samples above (if available) or draw an additional 
3 mL of blood to measure C7 ketones. The collection of this blood for measurement of 
ketones is optional. Subjects will also have a fasting EEG, and will be discontinued from 
the study at this visit. 
 
6.2.4 Final On-Study Evaluations 
Subjects will return for a 3 month off-intervention visit, which will essentially repeat the 
Visit 2 discontinuation visit. Subjects will undergo a medical history, clinical evaluation, 
physical exam, and neuropsychological testing, then be admitted for 24 inpatient 
continuous EEG. On day 1 or day 2, subjects will undergo  blood work (hematology,  
chemistry, and lipid panel). This stay will complete their participation, and subjects will 
be discontinued from the study. 
6.2.5. Pregnancy 
Women who become pregnant while on study will be discontinued from the oil 
immediately and brought in for a final evaluation as outlined above. If a women 
becomes pregnant on study, she will be dismissed from the study and will undergo no 
further study procedures. If a participant becomes pregnant while on study the subject 
would be instructed to discontinue further study therapy and inform the investigator 
immediately if she becomes pregnant at any time between the initiation of triheptanoin 
until 30 days after last receiving the triheptanoin. The investigator would counsel the 
subject regarding the possible effects of triheptanoin on the fetus and the need to inform 
the study site PI of the outcome of the pregnancy. If the outcome of the pregnancy 
meets the criteria for classification as an SAE. The PI would follow the procedures for 
reporting the SAE to both the IRB and FDA. This oil is used as a butter fat marker in 
Europe and there are no known teratogenic effects. However, no studies have been 
completed examining the effect of C7 on fetuses or breastfeeding newborns.  
 
6.3. Special Instructions and Definitions of Evaluations 
6.3.1. Informed Consent 
 
Patients will be brought into a private exam room for the consent process. The 
coordinator will introduce the study, explain the procedures, the patient rights and 
responsibilities, and the risks and benefits of the study. Dr. Pascual or M.D. co-
investigator will then discuss any additional questions regarding the study, ensure the 
patient and family understand the protocol, their responsibilities, and their commitment to 
the research. Once the Dr. Pascual or co-investigator is satisfied with the patient and 
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sign the consent form. If the subject is age 10-17 years, the subject must assent to the 
research study in order to participate. Dr. Pascual or co-investigator will then sign the 
consent form documenting that consent was obtained. 
The institutional research HIPAA form will also be reviewed with the family and any 
questions answered. Once the research team feels the subject and family understand the 
HIPAA form, parent or subject signatures will be obtained. 
Once the consent and HIPAA forms have been signed by the subject, parents, and PI or 
M.D. co-investigator, study procedures may be initiated. The research coordinator will 
create copies of the consent and HIPAA forms: one copy of each form will be returned to 
the subject and family, and the original of each document will be filed in the subject’s 
research file for the duration of the subject’s participation.  
Potential subjects who live out of state or outside the United States will have the option to consent 
to the study via telephone. Subjects will be provided a copy of the informed consent document, 
then a telephone call will be scheduled with Dr. Pascual. The process of obtaining informed 
consent will be conducted as outlined above. The subject will sign the consent form, then send 
the original copy of the informed consent document to Dr. Pascual. A copy of the signed consent 
form from both parties will be emailed or mailed back to the family for their records.  
6.3.2. Documentation of Glucose Transporter Type I Deficiency (G1D) 
 
Subjects must provide results of genotyping obtained in a CLIA-certified laboratory 
identifying the GID mutation, or PET scan results. Subjects enrolled in Protocol 1 of this 
study are eligible for this Protocol. 
6.3.3. Medical/Treatment History 
Procedure location:  Children’s Medical Center Rare Brain Disorders Clinic. Facilitators: 
Principal Investigator or physician co-investigators. All subjects’ symptoms, past medical 
history, and current and past treatments will be obtained using a standardized 
questionnaire that we have used extensively in metabolic encephalopathies to ensure that 
symptoms anticipated in G1D are sufficiently characterized (15, 16). For example, seizure 
frequency (the main indicator of neural dysfunction) is captured by this tool. However, in 
order to avoid ascertainment bias, a wide range of general questions related to all 
systems is included. This assessment takes approximately 30 minutes. 
6.3.4. Clinical Assessments/Targeted Physical Exam 
Procedure location: Children’s Medical Center Rare Brain Disorders Clinic. Facilitators: 
Dr. Pascual or physician co-investigators. We will utilize a standardized scoring system 
previously used by us to assess the clinical findings on examination (15, 16). The tool 
focuses on the following domains: (a) height, weight, and head circumference; (b) general 
medical exam; (c) general neurological exam; (d) cranial nerves; (e) stance and gait; (f) 
involuntary movements; (g) sensation; (h) cerebellar function; (i) muscle bulk, tone and 
strength; (j) myotatic reflexes, (k) presence of Babinski signs; and (l) other findings. 


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Results of these domains are scored as normal or abnormal and summarized as a total 
score with 76 being normal. This assessment takes approximately 30 minutes. 
6.3.5. Ataxia Scale: Brief Ataxia Rating Scale (BARS)  
Procedure location: Children’s Medical Center Rare Brain Disorders Clinic. Facilitators: 
Dr. Pascual or physician co-investigators. This assessment takes approximately 15 
minutes. The BARS (17) is valid, reliable, and sufficiently fast and accurate for clinical 
purposes (see Attachment). Items examined include: Gait, Knee-tibia test (decomposition 
of movement and intention tremor), Finger-to-nose test (decomposition and dysmetria of 
arm and hand), Dysarthria and Oculomotor abnormalities. Normal score is 0 and most 
ataxic score is 30. 
6.3.6. Clinical Global Impression Scale (CGI) 
Procedure location: Children’s Medical Center Rare Brain Disorders Clinic. Facilitators: 
Dr. Pascual or physician co-investigators. The CGI (18) is a 3-item, observer rated scale 
that provides an overall impression of subject condition based on the clinician’s 
assessment. This assessment takes approximately 5 minutes.  
6.3.7. Side Effect Assessment 
Side effects will be assessed using the Hague Side Effect Scale (19) and the VA Toxicity 
Scale (20), which are part of the Common Data Elements for NINDS. These scales, 
between them, measure side effects of anti-epileptic medications, including some 
gastrointestinal symptoms and systemic effects measured by our safety blood work. Side 
effects reported by the family but not found on the scales will be noted. These scales take 
approximately 20 minutes to complete. 
6.3.8. Pregnancy testing 
Pregnancy testing will be done via urine or  blood draw.. As the majority of our subjects 
are minors, we do not anticipate the timing will interfere with C7 initiation; however, C7 
will not be initiated until the pregnancy results are returned and are confirmed negative. 
Pregnancy tests can be ordered at any time if clinically necessary. 
6.3.9. Neuropsychological Evaluations 
The assessment battery, administration time, and data source (i.e., parent or child) is 
included in Table below. The selection of instruments is based on the NIH Workgroup 
recommendations. Outcome measures were selected based on clinical relevance, 
satisfactory reliability, established validity, sensitivity to change, minimal practice effect, 
and feasibility for administration to children with G1D. The battery is complete in that it 
measures the major domains of cognitive functioning, including intellectual ability, 
language, attention, working memory, processing speed, emotional and behavioral 
functioning, as well as adaptive behavior and quality of life. The primary outcome 
measure will be attention, as measured by performance on a computerized measure (K-


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CPT-2 or CPT-3, as described below) for the two older age groups (see Table B of the 
Proposal) and by performance on a working memory composite (Wechsler Working 
Memory Index [WMI], as described below) for the youngest age group (see Table B of 
the Proposal).  The WMI will be the primary outcome measure for the youngest age group 
because working memory relies heavily on attention—to the extent that it has been 
conceptualized as “executive attention” (29) and is increasingly viewed as having 
significant overlap with core attentional processes (30, 31)—and there are no direct, 
performance-based measures specific to attention that are normed for the youngest 
subjects in the present study, whereas the WMI is normed for the entirety of the three age 
groups described in Table B of the Proposal.  Attention is a core cognitive function that 
permits access to other areas of cognition (31) and is commonly impaired in association 
with seizure disorders. Existing research has indicated that dietary interventions have the 
potential to promote attention functioning in children with G1D (26, 27). 
The neuropsychologist or technician will complete the assessment battery. All instruments 
are age-appropriate and most are recommended as core or supplemental measures by 
the NIH Workgroup. Rest breaks will be provided. 
Subjects will be administered either the short form of the Wechsler Primary and Preschool 
Scale of Intelligence, 4th Edition (WPPSI-IV) (Wechsler, D.  (2012). WPPSI-IV: Wechsler 
Preschool and Primary Scale of Intelligence-Fourth Edition. San Antonio, TX: 
Psychological Corporation) or the Wechsler Abbreviated Scale of Intelligence, 2nd Edition 
(WASI-II) (Wechsler, D. (2011). WASI -II: Wechsler Abbreviated Scale of Intelligence- 
Second Edition.  San Antonio, TX: Psychological Corporation), according to the age of 
subject.  Administration takes approximately 20 minutes.  These tests provide an estimate 
of intellectual functioning.   
Subjects will be administered the Processing Speed Index Scale (PSI) from either the 
Wechsler Primary and Preschool Scale of Intelligence, 4th Edition (WPPSI-IV), Wechsler 
Intelligence Scale for Children, 5th Edition (WISC-V) (Wechsler, D.  (2014). WISC-V:  
Wechsler Intelligence Scale for Children, Fifth Edition. San Antonio, TX: Psychological 
Corporation) or the Wechsler Adult Intelligence Scale, 4th Edition (WAIS-IV), (Wechsler, 
D.  (2008).   WAIS-IV: Wechsler Adult Intelligence Scale, Fourth Edition, San Antonio, TX: 
Psychological Corporation) according to the age of subject.  Administration takes 
approximately 8 minutes.  These tests provide a motor-based estimate of the subject’s 
cognitive processing speed. 
Subjects will be administered the Working Memory Index Scale (WMI) from either the 
Wechsler Primary and Preschool Scale of Intelligence, 4th Edition (WPPSI-IV), Wechsler 
Intelligence Scale for Children, 5th Edition (WISC-V), or  the Wechsler Adult Intelligence 
Scale, 4th Edition (WAIS-IV) according to the age of subject.  Administration takes 
approximately 8 minutes.  These tests provide an estimate of the subject’s ability to 
temporarily keep information in mind for a brief period of time in order to use it, which 
often requires mentally reorganizing the information according to a given rule. 


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Subjects ages 5 and up will be administered the Purdue Pegboard (Tiffin, 1948). 
Administration takes approximately 3 to 5 minutes.  This test provides an estimate of 
unilateral and bilateral finger and hand dexterity. 
Subjects will be administered either the Conners’ Kiddie Continuous Performance Test 
Second Edition (K-CPT 2) (Conners, C.  K. (2013).  K-CPT 2:  Conners’ Kiddie 
Continuous Performance Test-Second Edition.  North Towanda, NY: Multihealth 
Systems) or the Conners’ Continuous Performance Test, Third Edition (CPT-3) (Conners, 
C.  K. (2013).  CPT-3:  Conners’ Continuous Performance Test-Third Edition. North 
Towanda, NY: Multihealth Systems) according to age.  These tests measure sustained 
attention and impulsivity; administration takes approximately 7 to 14 minutes depending 
on age of subject.   
Subjects will be administered a Peabody Picture Vocabulary Test, 4th Ed. (PPVT-4) 
(Dunn, L.M. & Dunn, D.M. (2007). Peabody Picture Vocabulary Test-Fourth Edition. 
Minneapolis, MN: Pearson Assessments) and Expressive Vocabulary Test, 2nd Ed. 
(EVT-2) (Williams, K.T. (2007). Expressive Vocabulary Test, Second Edition. 
Minneapolis, MN: Pearson Assessments). Combined administration takes approximately 
30 minutes, and each test is validated for ages from 2.5 years to adulthood. These tests 
measure receptive and expressive vocabulary, and incorporate domains of attention, 
information retrieval, and information expression.  
Parents or caregivers will be asked to complete the Adaptive Behavior Assessment 
System-Third Edition (ABAS-3) (Harrison, P. & Oakland, T. (2015). Adaptive Behavior 
Assessment System-Third Edition. San Antonio TX: Western Psychological Services) and 
the Child Behavior Checklist or Adult Behavior Checklist (as age appropriate) 
(Achenbach, T. M., & Rescorla, L. A. (2000). Manual for the ASEBA Preschool Forms & 
Profiles. Burlington, VT: University of Vermont, Research Center for Children, Youth, & 
Families, Achenbach, T. M., & Rescorla, L. A. (2001). Manual for the ASEBA School-Age 
Forms & Profiles. Burlington, VT: University of Vermont, Research Center for Children, 
Youth, & Families, Achenbach, T. M., & Rescorla, L. A. (2003). Manual for the ASEBA 
Adult Forms & Profiles. Burlington, VT: University of Vermont, Research Center for 
Children, Youth, & Families). These forms take approximately 30 minutes to complete 
together. Parents or caregivers also will be asked to complete a brief questionnaire 
(Appendix B: “Patient History Form”) that was locally developed to document information 
related to neuropsychological functioning, including demographic information, other 
medical history, and academic performance. This data will be collected in order to control 
for potential confounds affecting performance on the neuropsychological testing battery. 
This form takes approximately 15 minutes to complete. 
The Pediatric Quality of Life Inventory 4.0-Generic Core Scales (PedsQL) (21) will be 
completed by either the subject or parent/caregiver, depending on age of the subject.  At 
the completion of testing, the neuropsychologist will rate the utility of the completed 
testing, based on the child’s understanding of and ability to do the task. Particularly in the 
case of our younger subjects, the tests may be validated to their age, but the subject may 
be too impaired to provide useful testing results. 


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The Wechsler Primary and Preschool Scale of Intelligence-4th Edition (WPPSI-IV) is an 
individually administered, norm-referenced instrument for measuring the intelligence of 
children aged 2-years, 6-months to 7-years, 3-months.  The WPPSI-IV is a revision of the 
Wechsler Primary and Preschool Scale of Intelligence-3rd Edition (WPPSI-III) instrument 
recommended by the NINDS Common Data Elements (Neuropsychology) for assessing 
intelligence (22).  The WPPSI-III short-form is recommended for research purposes for 
obtaining an estimate of a child’s intellectual status (Sattler, J.  M., & Dumont, R.  (2004). 
Assessment of children: WISC-IV and WPPSI-III supplement.  La Mesa, CA:  Jerome M. 
Sattler); the short-form of the WPPSI-IV thus is utilized for the present study due to its 
updated normative data.   For each item, the subject will either be asked to define words 
that are read out loud or respond to a question by choosing a picture from four response 
options and answer questions that address a broad range of general knowledge topics.  
The subject will also either view an incomplete matrix and select the response option that 
completes the matrix or use one- or two-color blocks to re-create a design viewed in a 
model or picture.  The reliability and validity of the selected WPPSI-III short-forms is 
strong across ages with coefficients ranging from of .92 to .93 and .71 to .86, respectively.     
The Wechsler Abbreviated Scale of Intelligence-2nd Edition (WASI-II) is an individually 
administered, norm-referenced assessment of the intelligence of examinees ages 6 years 
through 90 years.  The WASI-II is a revision of the Wechsler Abbreviated Scale of 
Intelligence (WASI) (Wechsler, D. (1999). WASI: Wechsler Abbreviated Scale of 
Intelligence. San Antonio, TX: Psychological Corporation), recommended by the NINDS 
for the assessment of intelligence.  For each item, the subject will be asked to define 
words that are read out loud.  The subject will also view an incomplete matrix and asked 
to select the response option that completes the matrix.  The overall average reliability for 
FSIQ-2 (primary index score) is excellent across ages, ranging from .93 to .94.  The 
average test-retest reliability is strong across ages for FSIQ-2, ranging from .89 to .94.   
The Processing Speed Index Scale (PSI) is composed of two subtests from either the 
Wechsler Primary and Preschool Scale of Intelligence-4th Edition (WPPSI-IV PSI): Bug 
Search and Cancellation; the Wechsler Intelligence Scale for Children, 5th Edition (WISC-
V PSI): Coding and Symbol Search; or the Wechsler Adult Intelligence Scale, 4th Edition 
(WAIS-IV PSI): Coding and Symbol Search.  The Processing Speed Index Scale (PSI) 
provides a measure of the examinee’s ability to quickly and correctly scan, sequence, or 
discriminate simple visual information.  Young children (ages 4 to <6) will be asked to 
mark the bug that matches the target bug in a series of search groups and to scan two 
arrangements of objects (one random, one structured) and mark target objects, both 
tasks to be completed within separate time limits.  Older subjects (ages 6 and older) will 
be asked to use a key to fill in symbols that correspond with simple geometric shapes and 
to indicate whether target symbols are present in a series of search groups, both tasks to 
be completed within separate time limits. For the overall normative sample, the average 
reliability and stability coefficients range from strong to excellent.  The WPPSI-IV PSI has 
an overall average reliability of .86 and an overall average stability of .84.  The WISC-V 
PSI has an overall average reliability coefficient of .88 and average stability coefficient of 
.83 across ages.  The WAIS-IV PSI has an overall average reliability coefficient of .90 and 
average stability of .87 across ages. 


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The Working Memory Index Scale (WMI) is composed of two subtests from either the 
Wechsler Primary and Preschool Scale of Intelligence-4th Edition (WPPSI-IV WMI): 
Picture Memory and Zoo Locations; the Wechsler Intelligence Scale for Children, 5th 
Edition (WISC-V WMI): Digit Span and Picture Span; or the Wechsler Adult Intelligence 
Scale, 4th Edition (WAIS-IV WMI): Digit Span and Arithmetic.  The Working Memory Index 
Scale (WMI) provides a measure of the examinee’s working memory abilities.  Young 
children (ages 2:6 to <6) will be asked to select previously viewed pictures from options 
on a response page and to place previously viewed animal cards in the previously viewed 
location on a “zoo” template.  Older subjects (ages 6 to 16 years) will be read sequences 
of numbers and asked to recall the numbers in the same order, reverse order, and 
ascending order and to select previously viewed pictures from options on a response 
page.  Adult subjects (ages 17+) will be read a sequence of numbers and asked to recall 
the numbers in the same order, reverse order, and ascending order and to mentally solve 
a series of arithmetic problems.  For the overall normative sample, the average reliability 
and stability coefficients range from strong to excellent.  The WPPSI-IV WMI has an 
overall average reliability of .91 and an overall average stability of .87.  The WISC-V WMI 
has an overall average reliability coefficient of .92 and average stability coefficient of .82 
across ages.  The WAIS-IV WMI has an overall average reliability coefficient of .94 and 
average stability of .88 across ages.  
 
The Purdue Pegboard is a norm-referenced test of manual dexterity of examinees ages 5 
years through 89 years.  The Purdue Pegboard is recommended by the NINDS for the 
assessment of fine motor speed and manual dexterity (22). The right-hand (RH) and left-
hand (LH) subtests of the Purdue Pegboard provide a time-efficient estimate of these 
functions. For those two subtests, subjects use only the designated hand to place as 
many pins in holes as possible within 30 seconds.  Test-retest reliability ranges from 
acceptable to good, ranging from .76 to .89. 
The Conners’ Kiddie Continuous Performance Test- 2nd Edition (Conners K–CPT 2) is a 
norm-referenced, computerized measure of sustained attention and impulsivity that has 
normative data for children ages 4 years through 7 years.  The K–CPT 2 uses pictures of 
objects rather than letters, which are used in the Conners CPT-3.  The child is asked to 
respond to targets (all objects except soccer ball) and refrain from responding to non-
targets (soccer ball) that appear on the computer screen.  The median split -half reliability 
estimate across all scores was equal to .87.  The median test-retest correlation was .57. 
These results suggest a good level of test-retest reliability.  
The Conner’s Continuous Performance Test- 3rd Edition (Conners CPT-3) is a norm-
referenced, computerized measure of sustained attention and impulsivity that has 
normative data for children and adults ages 6 years and older.  The CPT-3 requires 
subjects to press the space bar whenever any letter except the letter ‘X’ appears on the 
computer screen.  Split-half reliability estimates of the Conners CPT-3 scales were 
calculated for the normative samples.  Results were very strong – across all scores, the 
median split-half reliability estimate was .92. 


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The Peabody Picture Vocabulary Test-Fourth Edition (PPVT-4) is a norm-referenced 
measure of receptive vocabulary that has normative data for ages 2 years 6 months 
through age 90 years.  The PPVT-4 has equivalent Forms A and B, and the PPVT-4 was 
co-normed with the Expressive Vocabulary Test-2 (EVT-2).  For each item, the examiner 
says a word, and the examinee responds by selecting the picture that best illustrates that 
word’s meaning.  Alternate form mean reliability across ages is strong (M=.89), as is test-
retest reliability across ages (M=.93).  In addition to measuring receptive vocabulary, the 
PPVT-4 has demonstrated utility as a method for estimating premorbid intelligence (25), 
which represents an additional rationale for its inclusion in the present study.  However, it 
should be noted that all subjects will participate in neuropsychological testing within the 
study protocol prior to administration of oil, thus providing baseline/pre-treatment data 
regarding neuropsychological functioning.  It is not possible to obtain truly “premorbid” 
neuropsychological data in the case of genetic disorders present at birth.  
The EVT–2 is an individually administered, norm-referenced instrument that assesses 
expressive vocabulary and word retrieval for children and adults ages 2 years 6 months 
through age 90 years. The EVT-2 provides two parallel forms A and B, and is co-normed 
with the PPVT-4.  Alternate form reliability across ages is excellent (M=.87) as is test-
retest reliability across ages (M=.95). 
Validity and reliability of the PPVT-4 and EVT-2 may be limited for examinees whose 
primary language is not English or Spanish, but this is predicted to affect a very small 
number of subjects.  At present, all North American patients in the registry have identified 
English as their primary language.  With any neuropsychological measure, individual 
factors such as language and overall degree of impairment may result in reduced utility of 
results in select cases, as previously acknowledged on Page 22 of this Protocol. 
The Adaptive Behavior Assessment System–Third Edition (ABAS–3) provides a 
comprehensive norm-referenced assessment of the adaptive skills of individuals ages 
birth to 89 years.  The scale yields assessment of 10 individual adaptive behavior 
domains (e.g., Self-Care, Home Living) and aggregates into Social, Conceptual, Practical, 
and General Adaptive Composites.  Test-retest reliability for the General Adaptive 
Composite across ages ranges from .82-.89 and inter-rater reliability across ages ranges 
from .83-.85.   
The Child Behavior Checklist for Ages 1 ½ to 5, Child Behavior Checklist, and Adult 
Behavior Checklist are parent/caregiver rating scales that assesses competencies, 
adaptive functioning, and behavioral, emotional, and social problems from age 1½ to over 
90 years.  Test-retest reliability is excellent, with coefficients for Total Problems scales for 
the parent/caregiver form falling at .90 for the preschool version, .94 for the school age 
scale, and .92 for the adult version of the rating scale.  Stability correlations are also 
acceptable at 12 months for the preschool (r=.76) and school age (r=.81) version, and 2-
year stability of the adult version falling at an acceptable level (r=.67). 
The PedsQL 4.0- Generic Core Scales is a modular approach to measuring health-related 
quality of life (HRQOL) in healthy children and adolescents and those with acute and 
chronic health conditions. The PedsQL 4.0 Generic Core Scales consist of 23 items and 


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covers 4 domains: physical (8 items), emotional (5 items), social (5 items) and school (5 
items).  It provides a total scales score from 23 items, of which 8 are for physical health 
summary score and 15 are for psychosocial health summary score.  The instrument takes 
5 minutes to complete and is translated in multiple international languages including 
broadcast Spanish. It is usable for parents/guardians of children between the ages of 2 to 
18 years (in 4 age groups) and child versions are available for all age groups except the 
2-4 years old.  Internal consistency reliability for the total scale Score (α = 0.88 child, 0.90 
parent report), Physical Health Summary Score (α = 0.80 child, 0.88 parent), and Psycho-
social Health Summary Score (α = 0.83 child, 0.86 parent) were acceptable for group 
comparisons (23).  Validity was demonstrated using the known-groups method, 
correlations with indicators of morbidity and illness burden, and factor analysis. The 
PedsQL distinguished between healthy children and pediatric patients with acute or 
chronic health conditions, was related to indicators of morbidity and illness burden, and 
displayed a factor-derived solution largely consistent with the a priori conceptually-derived 
scales. 
 
Schedule of Neuropsychological Testing 
Instrument/ (Age) 
Test  
Domain/time 
Data 
Source 
Timepoints 
Wechsler Preschool and 
Primary Scale of Intelligence, 
4th Edition (WPPSI-IV) - short 
form FSIQ-2 / (2:6 ≤ 5 yrs); 
Wechsler Abbreviated Scale of 
Intelligence-2nd Edition (WASI-
II) FSIQ-2 / (≥ 6 yrs)      
Intellectual 
ability/ 
(20’);(20’) 
Subject 
Visit 1: 
• 
Day 1: Pre-entry (non-
fasting no-oil) 
• 
Day 2: fasting EEG,  
Visit 3 (9 mo. off-oil) 
• 
Day 1: non-fasting, off-oil 
Peabody Picture Vocabulary 
Test, 4th Edition (PPVT-4)/ (≥ 
2:6 yrs)   & 
Expressive Vocabulary Test 2nd 
Edition (EVT- 2) / (≥ 2:6 yrs)        
 
Language/ 
(15’); (15’)  
Subject 
Visit 1: 
• 
Day 1: Pre-entry (non-
fasting no-oil)  
• 
Day 2: On treatment (non-
fasting on-oil) 
Visit 2 (6 mo. on-oil) 
• 
Day 1: non-fasting, on-oil 
Visit 3 (9 mo. off-oil) 
• 
Day 1: non-fasting, off-oil 
Conners’ Kiddie CPT, 2nd Ed. 
(K-CPT 2) / (4-5 yrs);  
Conners’ CPT, 3rd Ed. (CPT-3) /  
(6+ yrs) 
Attention/ 
(7.5’);(14’) 
Subject 
Visit 1: 
• 
 Day 1: Pre-entry (non-
fasting no-oil)  
• 
 Day 2: On treatment 
(non-fasting on-oil) 
Visit 2 (6 mo. on-oil) 
• 
Day 1: non-fasting, on-oil 
Visit 3 (9 mo. off-oil) 
• 
Day 1: non-fasting, off-oil 


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Working Memory Index Scale 
(WMI) subtests from either: 
• 
Wechsler Preschool and 
Primary Scale of 
Intelligence, 4th Ed. 
(WPPSI-IV; 2:6 to <6 
yrs) 
• 
Wechsler Intelligence 
Scale for Children, 5th Ed. 
(WISC-V; 6 to 16 yrs) 
• 
Wechsler Adult 
Intelligence Scale, 4th Ed. 
(WAIS-IV; 17+ yrs) 
Working 
memory/ 
(8’) 
Subject 
Visit 1: 
• 
Day 1: Pre-entry (non-
fasting no-oil)  
• 
Day 2: On treatment (non-
fasting on-oil) 
Visit 2, Day 1 (6 mo. on-oil) 
Visit 3, Day 1 (9 mo. off-oil) 
Processing Speed Index Scale 
(PSI) subtests from either: 
• 
Wechsler Preschool and 
Primary Scale of 
Intelligence, 4th Ed. 
(WPPSI-IV; 4 to <6 yrs) 
• 
Wechsler Intelligence 
Scale for Children, 5th Ed. 
(WISC-V; 6 to 16 yrs) 
• 
Wechsler Adult 
Intelligence Scale, 4th Ed. 
(WAIS-IV; 17+ yrs) 
Processing 
speed/ 
(8’) 
Subject 
Visit 1: 
• 
Day 1: Pre-entry (non-
fasting no-oil)  
• 
Day 2: On treatment (non-
fasting on-oil) 
Visit 2, Day 1 (6 mo. on-oil) 
Visit 3, Day 1 (9 mo. off-oil) 
Purdue Pegboard (5+ yrs) 
Fine motor 
speed and 
dexterity/ 
(3’ to 5’) 
Subject 
Visit 1: 
• 
Day 1: Pre-entry (non-
fasting no-oil)  
• 
Day 2: On treatment (non-
fasting on-oil) 
Visit 2, Day 1 (6 mo. on-oil) 
Visit 3, Day 1 (9 mo. off-oil) 
Adaptive Behavior Assessment 
Scale-Third Ed. (ABAS-3) - 
Parent/Primary Caregiver Form 
(0-5 yrs); Parent Form (5-21 
yrs.) 
Adaptive 
Behavior/ 
(15’ to 20’) 
Caregiver Visit 1, Day 1: Pre-entry (non-
fasting no-oil)  
Visit 2, Day 1 (6 mo. on-oil) 
Visit 3, Day 1 (9 mo. off-oil) 
Child Behavior Checklist 
(CBCL) /(1 ½ - 5 yrs); Child 
Behavior Checklist (CBCL) / (6-
18 yrs) 
Emotional & 
Behavioral 
Functioning/ 
(15’ to 20’) 
Caregiver Visit 1, Day 1: Pre-entry (non-
fasting no-oil) 
Visit 2, Day 1 (6 mo. on-oil) 
Visit 3; Day 1 (9 mo. off-oil) 
6.3.10. Nutritional Assessment 
At the initial visit, the registered dietician will conduct a complete review of the subject’s 
caloric intake, and work with PI to determine the optimal amount of oil based on the age, 
current caloric intake and dosing determined in Protocol 1. Additional nutritional 
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in the subject’s diet to minimize the risk of weight gain. The initial consult will take 
approximately 60 minutes. 
During each monthly phone call, the registered dietician will evaluate the subject’s current 
dietary intake to determine if any changes in amount of C7 administered are necessary. 
As these are primarily growing children, it is important to evaluate caloric intake regularly, 
as these needs can change dramatically over even a few months if the child goes through 
a growth spurt. Any changes in caloric intake, up or down, will be accounted for, and PI 
will be consulted if the changes are great enough to warrant a change in amount of daily 
C7 administration. This procedure will take approximately 20 minutes. 
6.3.11. Seizure count 
For one month prior to each study visit and for each month of participation, parents and 
caregivers will be asked to track how many observable seizures their child has. Although 
we have evidence that many patients with G1D have frequent abnormal EEG without 
observable seizures, seizure count is considered a gold standard in epilepsy research 
and will be included as a secondary measure. 
6.3.12. Electroencephalogram 
EEG recordings will be performed with standard 10-20 electrode recording placement and 
recorded by digital devices with a 1000 Hz sampling rate.  Recordings will last for 8 hours 
during daytime to provide a broad sample of the awake state.  The recordings will be 
stored electronically and locally until they are ready for central review.  Prior to 
transmission for central review the tracings will be de-identified and assigned a unique 
study number so that the EEG interpretation can be conducted in a blinded fashion. 
Central EEG review will be done by Dr. Douglas Nordli. 
Central EEG readings will be done using an FDA-approved specialized software designed 
for interpreting recordings from a wide variety of manufacturers (Insight by Persyst).   This 
will permit uniform interpretation of the tracings and will also allow for precise quantitative 
analysis of the spike-wave discharges.  The study will be pruned so that only awake 
portions are present before the analyses begin and the total duration of the awake 
recording will be noted. 
There will be three measures of the cerebral electrical activity.  The first will be a 
determination of the frequency of the posterior dominant rhythm.  This will be measured 
bilaterally in a non-drowsy portion of the awake recording after eye closure. 
The second measure will be the total number of generalized spike-wave discharges will 
be counted in the awake state only. Computerized automated spike detection will be run 
on the sample and then the resultant spikes will be analyzed using the spike clustering 
feature of Insight.  This will allow the central reader to reject all detections that are not 
generalized spikes, and the resultant number of bona fide generalized spikes will be 
displayed.  The ratio of generalized spike-wave discharges per unit time of the awake 
tracing will be recorded.  


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The final and third analysis will be of the total number of generalized 3 Hz spike-wave 
discharges lasting longer than 3 seconds.  Here, the rhythmic burst detection system of 
Insight will be used to identify every burst, and these will be reviewed by the central 
reader to ensure that they are all accurate detections of the specified time duration.  The 
total number will be recorded and once again compared to the total duration of the awake 
tracing.   
Laboratory Evaluations 
Hematological and chemical profiles (including blood cell count, comprehensive metabolic 
panel, lactate, lipid panel, urine and or blood pregnancy test if appropriate,  and beta-
hydroxybutyric acid (a ketone body generated by ketogenic diets) will be measured by 
standard clinical laboratory methods and compared to normal values established in each 
laboratory. Measurement of C7 ketones will be conducted by a collaborating research 
laboratory. 
 
6.3.13. Triheptanoin Initiation 
Triheptanoin initiation will be accomplished in the Epilepsy Monitoring Unit located in the 
Children’s Medical Center. Initiation will be completed under the supervision of Dr. Pascual 
or one of the physician investigators. 
6.3.14. Adherence Assessments 
Adherence will be evaluated during a monthly phone call. Parents will be asked to rate 
adherence on a scale of 1 to 10. Quantity of oil remaining will also be assessed via the 
phone call. 
 
7. 
MANAGEMENT OF ADVERSE EXPERIENCES 
 
Previous experience with C7 oil in different populations has yielded no serious adverse 
effects. Due to the limited nature of the use of C7 oil, there are no definitive data available 
on how frequent the following side effects occur. 
 
Diarrhea: Subjects who experience diarrhea may be instructed to increase the amount of 
fiber consumed with each meal. In addition, C7 will be administered in a fat free, sugar 
free food item, such as yogurt or pudding, and subjects are instructed to consume this 
food over 30 minutes in order to minimize diarrhea. Subjects who cannot tolerate the 
maximum tolerable dose will be discontinued from the study. 
 
Stomach pain: Subjects who experience stomach pain at treatment initiation may, at the 
direction of Dr. Pascual or M.D. co-investigator, reduce the dose of C7 oil to 50% for 2 
days, then increase the daily dose back to the recommended level within a week. If 
subjects cannot tolerate the recommended dose, they will be discontinued from the study. 
 


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Weight gain: Subjects who experience weight gain (defined as any weight gain greater 
than 5% of the total body weight expected if the individual percentile were followed in the 
standard weight growth curve; CDC Standard Growth Curves, 2001) will be re-counseled 
about the dietary changes recommended while taking the C7 oil supplement. Subjects will 
have a dietician consult prior to treatment initiation and during treatment initiation, to 
discuss these changes (primarily reduction in other dietary fat). If subjects continue to 
experience weight gain, they will undergo a dietary assessment. If subjects have made 
recommended changes and continue to gain weight, they will be removed from the study 
and an adverse event will be reported. 
 
8. 
CRITERIA FOR INTERVENTION DISCONTINUATION 
 
Triheptanoin supplementation will be discontinued if any of the following occur: 
 
Any of the cited or other adverse experiences become intolerable to the subject 
Metabolic syndrome develops as assessed by glucose and lipid profiles 
Any elevation above laboratory normal range in hepatic transaminases or 
creatinine is noted 
Any clinically relevant blood cell count abnormality  develops 
Non-compliance occurs 
Severe intercurrent illnesses take place 
 
Subjects who discontinue due to the above reasons will be asked to return for a final 
research visit to complete exit procedures and receive referrals for ongoing care if 
necessary. Subjects who are discontinued due to adverse events will be followed via 
daily, alternate-day or weekly phone calls to assess resolution of the adverse event. 
9. 
STATISTICAL CONSIDERATIONS 
9.1. General Design Issues  
In the proposed single-arm phase II trial, we define favorable impact on the 
neurocognitive outcome as at least 0.5 standard deviation (SD) improvement in 
performance on attention measures (measured as described above) after administration 
of C7. That is, impact on the outcome is determined by whether a treatment causes at 
least 0.5 SD improvement on the primary attention measure for that age group in a 
single arm trial and the interest is primarily focused on reaching a decision on 
whether to progress with C7 to a future larger trial. (Note: The SD is a normative 
parameter provided with the testing instruments). The evidence to make this decision is 
evaluated by testing the null hypothesis that the true efficacy rate is less than or equal 
to some pre-specified value. It is desirable to achieve this goal whilst minimizing the 
number of subjects exposed to a novel agent. Here, we use the Simon’s optimal two-
stage design that yields the smallest expected sample size when the null hypothesis is 
true. 


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We apply Simon’s optimal two-stage design (24) using as primary outcome attention 
performance for each of three age groups. At least 0.5 SD improvement in performance 
on the primary attention measure after the administration of C7 is considered a 
favorable outcome. The measurement of 0.5 SD improvement is commonly accepted as 
the cutoff for a minimally clinically important difference, as described in various studies 
(e.g., 32, 33). 
 
This protocol will yield data that allow a clear go/ no-go decision regarding whether C7 
should proceed to an efficacy trial:  
 
• If a favorable outcome occurs in less than 50% of subjects, we will recommend 
that C7 not proceed to an efficacy trial.  
 
• If a favorable outcome occurs in at least 80% of subjects, we will recommend 
that C7 proceed to an efficacy trial.  
 
The sample size estimation for this optimal two-stage design is given in Section 9.3.  
 
If an intermediate number of subjects (51 – 79%) exhibit a favorable primary attention 
outcome, the rest of outcomes, including the long-term, 6-month responses, will be 
considered for the go/ no-go decision on the basis of impact on these outcomes and the 
disease process, in addition to tolerability and safety indicators.   
 
Clinical significance and meaningfulness of the primary neurocognitive 
(attention) outcome: Attention is a core cognitive function that permits access to other 
areas of cognition and is commonly impaired in association with seizure disorders. 
Existing research has indicated that dietary interventions have the potential to promote 
attention functioning in children with G1D (26, 27). With regard to long-term outcomes, 
research in the field of childhood absence epilepsy has shown that even after attaining 
seizure freedom, attention deficits may remain (28). In other words, even normal EEG 
findings may not correspond to functional neuropsychological improvements. These 
findings in the field of childhood absence epilepsy are significant for the present study 
given that EEG seizures are more common than observable seizures in children with 
G1D. Additionally, these findings with regard to childhood absence epilepsy may help 
explain why language functioning improvements in children with G1D after 
administration of triheptanoin were not statistically significant in a previous trial (1). 
Again, attention is a core cognitive function that permits access to other areas of 
cognition (including language) and is commonly impaired in association with seizure 
disorders. For all of these reasons, attention functioning as measured by 
neuropsychological testing (described below in 6.3.9) may be a more relevant primary 
outcome for the present study than EEG findings.  As noted above, the measurement of 
0.5 SD improvement is commonly accepted as the cutoff for a minimally clinically 
important difference, as described in various studies (e.g., 32, 33), and thus in the 
present study we will look for this degree of improvement in performance on the primary 
measure of attention to answer the go/no-go decision for each age group. 
 


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Clinical significance and meaningfulness of the secondary EEG outcome: A 
specific (but variable across studies) percentage in EEG seizure reduction is a generally 
accepted outcome in epilepsy trials. The spike-wave and other EEG changes 
investigated above in this trial have the potential to reflect a meaningful disease burden 
reduction to patients that would be associated, if realized, with considerably fewer 
observable seizures, since EEG seizures are significantly more frequent than overt 
seizures in G1D (1). In this publication (1) we observed that, on average, a reduction in 
seizure rate comparable to the reduction sought above is associated with a significant 
acute (hours to days) impact on neuropsychological performance as well as sustained 
(months) quality of life and neuropsychological scores (1). As described in the proposal, 
this rate allowed many patients to significantly increase school performance, social 
interactions, autonomy and a decrease in or a cessation of antiseizure drugs. Every 
patient who participated in (1) experienced improvement in terms of one or more of 
these aspects and most improved in all of them. Thus, the expected reduction in EEG 
spike-wave burden after C7 treatment may be highly medically significant, but the 
definitive implications of this will be established only in more advance-phase trials. 
Therefore, we will attempt to relate attention scores (primary outcome) with EEG 
recordings (used here as a surrogate marker of the disease and a secondary outcome) 
to seek such correlations. The long-term aspects of the treatment, which may be 
expected to illustrate sustained or additional benefits as in (1) are also captured on the 
6-month on-treatment study design. 
 
Although a variety of designs were considered, including crossover designs for non-
ketogenic diet subjects and randomization to C7 or ketogenic diet, several factors 
contributed to the development of an open-label design. The G1D population, while 
hypothesized to be greater than previously realized, is currently a relatively small 
population and the number of patients needed to adequately power a cross over study 
could be difficult to recruit. This holds true for a head to head comparison of C7 and 
ketogenic diet, although the increasing availability of genomic testing may increase the 
available population in the next few years. Finally, and most importantly, the safety and 
tolerability of C7 has not been rigorously proven in G1D. Therefore, this issue needs to 
be addressed before entering into advanced clinical trials.  
 
A six-month, on-supplement follow up time period was chosen in order to provide long-
term safety and tolerability data for triheptanoin. Additionally, we consulted with Dr. 
Holland (co-investigator), an established pediatric neuropsychologist expert in G1D. It 
is general practice to wait a minimum of 6 months after ischemic insult to the brain 
(such as traumatic brain injury or stroke) before assessing neurocognitive changes. 
This time period is consistent with how long it takes the brain to demonstrate 
performance improvement after these insults. Because chronic seizures can also 
induce long-term brain changes, 6 months was chosen to allow sufficient time for the 
brain to exhibit improvement that could be captured by the outcome measure tools.  
 
The three-month exit visit allows us to assess whether changes in brain wave activity 
and other neurocognitive measures persist after withdrawal of oil. 
 


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9.2.  Outcomes 
9.2.1. Primary outcome 
9.2.1.1. 
Attention performance 
C7 provides a spectrum of short-term (hours to days) and long-term (over 
6 months) benefits in subjects with G1D as measured by a 0.5 SD 
improvement in performance on the primary attention measure both in the 
acute and long-term. 
Subjects receiving C7 supplementation will experience a significant (0.5 
SD) improvement in performance on the primary attention measure for 
each subject’s age group.  
 
9.2.2. Secondary outcomes  
9.2.2.1. 
EEG 
C7 provides a spectrum of short-term (hours to days) and long-term (over 
6 months) benefits in subjects with G1D as measured by a decrease in 
abnormal EEG activities as defined above both in the acute and long-term. 
9.2.2.2. 
Other neuropsychological and neurological performance, such as ataxia. 
Subjects undergoing C7 supplementation will experience improvements in 
neuropsychological and neurological performance over the long term. 
Subjects will experience an increase in vocabulary expression and recall 
in both the acute (days) and long term (months) time frames. Subjects will 
also experience decreases in ataxia and other neurological symptoms 
measured on the neurological assessment. 
9.2.2.3. 
Safety 
C7 supplementation is safe when used over the long term (6 months) 
period. Subjects will experience no clinically significant changes in 
standard laboratory measures (blood cell count, blood electrolytes, AST, 
ALT, blood urea nitrogen, creatinine, lipid panel, plasma glucose and beta-
hydroxybutyric acid.) and exhibit no evidence of toxicity as measured by 
the VA Toxicity Scale. 
 
9.3.  Sample Size and Accrual 
We estimated the sample size using the primary outcome (attention) for each of three 
age groups. The same method will be applied for sample size estimation in each of 
three age groups. An improvement of 0.5 SD or more on the primary attention measure 


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after the administration of C7 is considered a favorable outcome. This study will yield 
data that allow a clear go/no-go decision regarding whether C7 should proceed to an 
efficacy trial: If a favorable outcome occurs in less than 50% of subjects, we will 
recommend that C7 not proceed to an efficacy trial. If a favorable outcome occurs in at 
least 80% of subjects, we will recommend that C7 proceed to an efficacy trial. 
 
The sample size was estimated using Simon’s optimal two-stage design (24). The null 
hypothesis that the proportion of favorable outcome is 50% will be tested against a one-
sided alternative hypothesis that the proportion of favorable outcome is 80%. In the first 
stage, 7 subjects will be accrued. If there are 4 or fewer favorable outcomes in these 7 
subjects, the study will be stopped, and we will recommend that C7 not proceed to an 
efficacy trial. Otherwise, 6 additional subjects will be accrued for a total of 13 subjects. If 
8 or fewer favorable outcomes are observed in 13 subjects by the end of stage two, 
then no further investigation of C7 is warranted. This design yields a type I error rate of 
0.1 and power of 80% when the true favorable outcome occurs in 80% of subjects. We 
plan to recruit 15 subjects with an expected 15% dropout rate resulting in 13 subjects 
for each age group.  That is, we will recruit a total of 45 subjects for this protocol. 
 
9.4. Data and Safety Monitoring 
 
A Monitoring Committee (MC) consisting of 5 external pediatric neurologists and a 
patient advocate has been assembled. The committee will be chaired by Dr. Marc 
Patterson of the Mayo Clinic in Rochester, MN. Dr. Patterson and the committee will 
review the side effect and adverse event data at each enrollment milestone (25%, 50%, 
75%, and 100%), and additionally as recommended by the committee. The committee 
will meet via Skype or web conference at these milestones, and Dr. Patterson will 
communicate the results to PI, along with any recommendations the committee had 
regarding safety. The current committee is composed of the members listed in the 
following table. 
 
 
Data and safety monitoring committee at a glance 
Member 
Affiliation 
Credentials 
Patterson, chair 
Director of Pediatric and 
Adolescent Neurology, Mayo 
Clinic 
Neurometabolic disorders, 
clinical trials (Niemann-Pick type 
C disease, lysosomal storage 
diseases) 
DiMauro  
Director emeritus, H. Houston 
Merritt Clinical Research Center 
Columbia University 
Neurometabolic disorders, 
clinical trials (mitochondrial and 
neuromuscular diseases). 
Member, Institute of Medicine 
Kossoff 
Medical director, Ketogenic Diet 
Program, Johns Hopkins 
University 
Ketogenic diet and alternative 
therapies. Coauthor of 
Treatment of Pediatric 
Neurologic Disorders and the 5th 
edition of The Ketogenic Diet 


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Rapaport 
Patient advocacy 
representative: Glut1 Deficiency 
Foundation member (Education 
Committee) 
Ph.D. (Environmental 
Engineering and Chemistry). 
Past Associate Director, Product 
Safety and Regulatory Affairs, 
Procter & Gamble. Led 
Department consisting of > 100 
toxicologists in U.S., Europe and 
Asia. 
Ronen 
Professor of Pediatrics, 
McMaster University 
Identified index case of G1D in 
1989 (De Vivo el al., NEJM 
325:703-9, 1991). Master’s 
degree in clinical research 
methodology. Director of 
internationally-acclaimed 
research program in quality of 
life in children with epilepsy 
 
 
 
 
Roach 
Section Chief of Pediatric 
Neurosciences at Dell 
Children’s Medical Center of 
Central Texas; Professor, 
Department of Neurology, 
University of Texas at Austin 
Authored or edited 9 medical 
text books and more than 200 
journal articles, many focusing 
on genetic neurological 
disorders or stroke in children 
and adults.  Editor-in-chief of 
Pediatric Neurology and former 
president of the Child Neurology 
Society 
 
If a physician committee member determines that they are no longer able to serve on 
the MC, the other committee members will be asked for recommendations for a 
replacement member, in consultation with PI. A replacement member will be identified, 
and the approval of NINDS will be sought prior to confirming the replacement. 
 
In the event that the patient advocate representative makes the decision to step down, 
the board of the Glut1 Deficiency Foundation will be consulted, and a request for a 
replacement member will be made. The approval of NINDS will be sough prior to 
confirming the replacement of this committee member. 
 
9.5.  Data Analyses 
 
Summary descriptive statistics:  For normally distributed, continuous data, means and 
standard deviations will be used to describe the demographic and clinical 
characteristics of the patient population participating in the study and medians and 
semi-interquartile ranges will be used to describe characteristics of the patient 
population when the data are continuous, non-normally distributed.  For categorical or 
dichotomous variables, the frequency or the proportion will be reported. 
 


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Primary Aim: The primary aim is demonstrating the benefit of C7, as measured by a 
change in performance on the primary attention measure for each age group. The 
proportion of subjects who achieved favorable outcome will be estimated along with the 
corresponding 95% confidence interval using an exact binomial method. We will also 
investigate if there will be significant differences in the proportions of favorable 
outcomes among three age groups using Fisher’s exact test. We will make every effort 
to minimize the missing data. We expect minimal amount of missing data. If missing 
data occurs, missing data will be imputed using multiple imputation techniques. 
Generalized estimating equation (GEE) analysis will be used to examine if C7 positively 
affects other neuropsychological (e.g., IQ, language, processing speed) and 
neurological performance, such as ataxia over time (baseline, 6 months, and 9 
months). 
 
Secondary Aim: A secondary aim is to evaluate the effect of C7 supplementation of a 
regular diet on an EEG activity and to evaluate the safety of C7 supplementation. EEG 
will be analyzed in 3 ways (spike-wave duration, total number of seizures and 
background of the EEG as described above). GEE analysis will be used to examine if 
there are significant changes in EEG activity and safety over time. GEE analysis will be 
also conducted to investigate whether attention neuropsychological scores correlate 
with the EEG findings.  
 
Study end. Statistical analyses at the end of the study will examine the initial measures 
at baseline, 6 months, and 9 months. Repeated measurement data will be analyzed 
using the generalized estimating equation (GEE) approach. The GEE method has 
been widely used for the analysis of repeated measurement data because of its 
robustness to random missing and misspecification of the true correlation structure.  
 
SAS V9.4 (SAS Institute, Inc. SAS V9.4, Cary, NC, 2014) will be used to analyze the 
data. 
10. DATA COLLECTION, SITE MONITORING, AND ADVERSE EXPERIENCE REPORTING 
 
10.1. 
Records to Be Kept 
All signed informed consent forms will be maintained in a locked filing cabinet 
accessible only to the Dr. Pascual, Clinical Director, and research coordinator. 
This cabinet is located in a limited-access room which requires an authorized 
badge to enter. 
 
All records collected for research-only purposes (research EEG, metabolic 
assays) will be maintained in a secure fashion. Paper records will be maintained 
in a locked filing cabinet in a limited-access room. Electronic records will be 
maintained on an internal, secure UTSW server accessible only by authorized 
username and password. These servers are backed up nightly, are HIPAA and 
HiTECH compliant, and are behind the same level of security as UT 
Southwestern and Children’s Medical Center Dallas’ medical records. 


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Subject’s will be assigned a study ID, and all materials collected for research 
purposes will be de-identified using this study ID, including data and case report 
forms. A file containing the link will be maintained for the duration of active study 
procedures and during data cleaning. Once the data has been cleaned, the file 
containing the link to patient ID will be deleted and destroyed.  
Records collected for clinical and research purposes (e.g., blood tests completed 
at Children’s Medical Center, and neurological evaluations done at each visit) will 
become part of the subject’s medical record at Children’s Medical Center and 
may be copied and transferred to the subject’s primary referring physician at the 
patient request. 
 
Neuropsychological test forms are not part of the medical records. Results from 
these tests will become part of the subject’s research record, but source 
documents will be maintained by the Department of Psychology at Children’s 
Medical Center in accordance with internal privacy laws, and are subject to a 
greater level of confidentiality than the primary medical record. 
 
The investigator-sponsor will maintain records in accordance with Good Clinical 
Practice guidelines; to include: 
 
• FDA correspondence related to the IND application and Investigational Plan; 
including copies of submitted Form FDA 3500 A, supplemental IND applications, 
current investigator lists, progress reports, and failure to obtain informed consent 
reports; 
• IRB correspondence (including approval notifications) related to the clinical 
protocol; including copies of adverse event reports and annual or interim reports; 
• Current and past versions of the IRB-approved clinical protocol and 
corresponding IRB-approved consent form(s) and, if applicable, subject 
recruitment advertisements. 
• Signed Investigator’s Agreements and Certifications of Financial Interests of 
Clinical Investigators; 
• Curriculum vitae (investigator-sponsor and clinical protocol sub-investigators); 
• Certificates of required training (e.g., human subject protections, Good Clinical 
Practice, etc.) for investigator-sponsor and listed sub-investigators; 
• Normal value(s)/range(s) for medical/laboratory/technical procedures or tests 
included in the clinical protocol; 
• Laboratory certification information; 
• Instructions for on-site preparation and handling of the investigational study 
treatment (i.e., if not addressed in the clinical protocol); 
• Signed informed consent forms; 
• Completed Case Report Forms; signed and dated by investigator-sponsor; 
• Source Documents or certified copies of Source Documents; 
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• Copies of investigator-sponsor correspondence to sub-investigators, including 
notifications of adverse effect information; 
• Subject screening and enrollment logs; 
• Subject identification code list; 
• Investigational drug accountability records, including documentation of disposal; 
• Final clinical study report. 
 
The investigator-sponsor will retain the specified records and reports for up to 2 
years after the marketing application is approved for the investigational product; 
or, if a marketing application is not submitted or approved for the investigational 
drug, until 2 years after investigations under the IND have been discontinued and 
the FDA so notified. 
 
 
 


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10.2. 
Role of Data Management 
This is a single site study; there are no other clinical sites or statistical center. 
The CTSA division at UT Southwestern Medical Center will create and maintain 
our database for this study. 
10.3. 
Quality Assurance 
Study personnel and physicians will be trained prior to protocol initiation. Dr. 
Pascual will participate in several subject intake and evaluations with the 
physician investigators throughout the study period to ensure quality of clinical 
exams. In addition, Dr. Pascual will review records collected during these clinical 
exams to ensure completeness and accuracy. 
The Clinical Director will supervise training of all support personnel, including the 
research coordinator. She will provide monitoring of regulatory compliance on all 
aspects of the study, including review of research records and consent forms. 
The research coordinator will be responsible for submitting all IRB 
documentation, but will work with the Clinical Director when necessary to ensure 
compliance.  
Dr. Pascual and Clinical Director will work together to ensure all personnel are 
properly trained on their role in the project, and will work together on all federal 
submissions to remain compliant with reporting requirements. 
In the event that monitoring authorities request records, Dr. Pascual and the 
Clinical Director will work together with the authorities to provide all requested 
and required documentation. 
10.4. 
Adverse Experience Reporting 
Adverse experiences will be collected from subjects at each daily visit. Adverse 
experiences will be recorded using Adverse Event forms from the NINDS 
common data elements for epilepsy website (VA toxicity scale; see Attachment). 
Adverse events will be reported following all requirements set forth by the FDA, 
OHRP, and local IRB. 
 
 
10.4.1.Adverse event definitions 
 
Adverse effect. Any untoward medical occurrence in a clinical study of an 
investigational product, regardless of the causal relationship of the problem with 
the product. 
 
Associated with the investigational product.  There is a reasonable possibility that 
the adverse effect may have been caused by the investigational product. 
 


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Disability.  A substantial disruption of a person’s ability to conduct normal life 
functions. 
 
Life-threatening adverse effect.  Any adverse effect that places the subject, in the 
view of the investigator-sponsor, at immediate risk of death from the effect as it 
occurred (i.e., does not include an adverse effect that, had it actually occurred in 
a more severe form, might have caused death). 
 
Serious adverse effect. Any adverse effect that results in any of the following 
outcomes: death, a life-threatening adverse effect, inpatient hospitalization or 
prolongation of existing hospitalization, a persistent or significant 
disability/incapacity, or a congenital anomaly/birth defect. 
 
Hospitalization shall include any initial admission (even if less than 24 hours) to a 
healthcare facility as a result of a precipitating clinical adverse effect; to include 
transfer within the hospital to an intensive care unit.  Hospitalization or 
prolongation of hospitalization in the absence of a precipitating, clinical adverse 
effect (e.g., for a preexisting condition not associated with a new adverse effect 
or with a worsening of the preexisting condition; admission for a protocol-
specified procedure) is not, in itself, a serious adverse effect.   
 
Unexpected adverse effect.  Any adverse effect, the frequency, specificity or 
severity of which is not consistent with the risk information described in the 
clinical study protocol(s) or elsewhere in the current IND application, as 
amended. 
 
Unanticipated adverse effect.  Any serious adverse effect on health or safety or 
any life-threatening problem or death caused by, or associated with, an 
investigational product, if that effect, problem, or death was not previously 
identified in nature, severity, or degree of incidence in the investigational plan or 
IND application (including a supplementary plan or application), or any other 
unanticipated serious problem associated with an investigational product that 
relates to the rights, safety, or welfare of subjects. 
 
 
10.4.2. Recording and assessment of adverse effects.  
 
All observed or volunteered adverse effects (serious or non-serious) and 
abnormal test findings, regardless of treatment group, if applicable, or suspected 
causal relationship to the investigational product will be recorded in the subjects’ 
case histories.  For all adverse effects, sufficient information will be pursued 
and/or obtained so as to permit 1) an adequate determination of the outcome of 
the effect (i.e., whether the effect should be classified as a serious adverse 
effect) and; 2) an assessment of the casual relationship between the adverse 
effect and the investigational product.    
 


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Adverse effects or abnormal test findings felt to be associated with the 
investigational product will be followed until the effect (or its sequelae) or the 
abnormal test finding resolves or stabilizes at a level acceptable to the 
investigator-sponsor. 
 
 
10.4.3 Abnormal test findings:   
 
An abnormal test finding will be classified as an adverse effect if one or more of 
the following criteria are met: 
 
• The test finding is accompanied by clinical symptoms. 
 
• The test finding necessitates additional diagnostic evaluation(s) or 
medical/surgical intervention; including significant additional concomitant drug or 
other therapy.  (Note: simply repeating a test finding, in the absence of any of the 
other listed criteria, does not constitute an adverse effect.) 
 
• The test finding leads to a change in study dosing or exposure or discontinuation 
of subject participation in the clinical study. 
 
• The test finding is considered an adverse effect by the investigator-sponsor. 
 
 
 
10.4.4.Causality and severity assessment:  
 
The investigator-sponsor will promptly review documented adverse effects and 
abnormal test findings to determine 1) if the abnormal test finding should be 
classified as an adverse effect; 2) if there is a reasonable possibility that the 
adverse effect was caused by the investigational product; and 3) if the adverse 
effect meets the criteria for a serious adverse effect. 
 
If the investigator-sponsor’s final determination of causality is “unknown and of 
questionable relationship to the investigational product”, the adverse effect will be 
classified as associated with the use of the investigational product for reporting 
purposes.  If the investigator-sponsor’s final determination of causality is 
“unknown but not related to the investigational product”, this determination and 
the rationale for the determination will be documented in the respective subject’s 
case history.  
 
 
10.4.5.Reporting of adverse effects to the FDA 
 
The investigator-sponsor will submit a completed Form FDA 3500 A to the FDA’s 
Center for Devices and Radiological Health for any observed or volunteered 
adverse effect that is determined to be an unanticipated adverse effect.  A copy 
of this completed form will be provided to all participating sub-investigators.   
 


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The completed Form FDA 3500 A will be submitted to the FDA as soon as 
possible and, in no event, later than 10 working days after the investigator-
sponsor first receives notice of the adverse effect. 
 
If the results of the sponsor-investigator’s follow-up evaluation show that an 
adverse effect that was initially determined to not constitute an unanticipated 
adverse effect does, in fact, meet the requirements for reporting; the investigator-
sponsor will submit a completed Form FDA 3500 A as soon as possible, but in no 
event later than 10 working days, after the determination was made. 
 
For each submitted Form FDA 3500 A, the sponsor-investigator will identify all 
previously submitted reports that that addressed a similar adverse effect 
experience and will provide an analysis of the significance of newly reported 
adverse effect in light of the previous, similar report(s). 
 
Subsequent to the initial submission of a completed Form FDA 3500 A, the 
investigator-sponsor will submit additional information concerning the reported 
adverse effect as requested by the FDA. 
 
 
10.4.6.Reporting of adverse effects to the responsible IRB.   
 
In accordance with applicable policies of the University of Texas Southwestern 
Medical Center Institutional Review Board (IRB), the investigator-sponsor will 
report, to the IRB, any observed or volunteered adverse effect that is determined 
to meet all of the following criteria: 1) associated with the investigational product; 
2) a serious adverse effect; and 3) an unexpected adverse effect.  Adverse event 
reports will be submitted to the IRB in accordance with the respective IRB 
procedures.  
 
Applicable adverse effects will be reported to the IRB as soon as possible and, in 
no event, later than 10 calendar days following the investigator-sponsor’s receipt 
of the respective information.  Adverse effects which are 1) associated with the 
investigational drug or, if applicable, other study treatment or diagnostic 
product(s); 2) fatal or life-threatening; and 3) unexpected will be reported to the 
IRB within 24 hours of the investigator-sponsor’s receipt of the respective 
information.  
 
Follow-up information to reported adverse effects will be submitted to the IRB as 
soon as the relevant information is available.  If the results of the sponsor-
investigator’s follow-up investigation show that an adverse effect that was initially 
determined to not require reporting to the IRB does, in fact, meet the 
requirements for reporting; the investigator-sponsor will report the adverse effect 
to the IRB as soon as possible, but in no event later than 10 calendar days, after 
the determination was made. 
 


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11. HUMAN SUBJECTS 
11.1. 
Institutional Review Board (IRB) Review and Informed Consent 
This protocol and the informed consent document (Appendix I) and any 
subsequent modifications will be reviewed and approved by the IRB committee 
responsible for oversight of the study. A signed consent form will be obtained 
from the subject. For subjects who cannot consent for themselves, such as those 
below the legal age, a parent, legal guardian, or person with power of attorney, 
must sign the consent form; additionally, the subject's assent must also be 
obtained if he or she is able to understand the nature, significance, and risks 
associated with the study.  The consent form will describe the purpose of the 
study, the procedures to be followed, and the risks and benefits of participation. 
A copy of the consent form will be given to the subject, parent, or legal guardian, 
and this fact will be documented in the subject’s record. 
 
11.2. 
Subject Confidentiality 
 
All laboratory specimens, evaluation forms, reports, video recordings, and other 
records that leave the site will be identified only by the Study Identification 
Number (SID) to maintain subject confidentiality. All records will be kept in a 
locked file cabinet. All computer entry and networking programs will be done 
using SIDs only. Clinical information will not be released without written 
permission of the subject, except as necessary for monitoring by IRB, the FDA, 
the NINDS, the OHRP, the sponsor, or the sponsor’s designee. 
 
11.3. 
Study Modification/Discontinuation 
 
The study may be modified or discontinued at any time by the IRB, the NINDS, 
the OHRP, the FDA, or other government agencies as part of their duties to 
ensure that research subjects are protected. 
 
 
12. ETHICAL CONSIDERATIONS 
 
12.1. 
Risk/benefit assessment 
Prior experience with triheptanoin has seen no adverse events in approximately 
100 patients (adults and pediatric). Side effects risks (weight gain and 
gastrointestinal distress, diarrhea, and nausea) do not persist after 
discontinuation or appropriate modification of diet. Extensive laboratory tests will 
be completed at every visit in order to monitor for any changes in patient health 
status. 
Benefits potentially include a reduction in daily seizure activity, improvement in 
movement symptoms (e.g., ataxia), and improvement in neuropsychological 
functioning. For these reasons, we find the risk/benefit assessment to be 
positive. 


46 
 
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Version 6 
 
 
01/21/2021 
STU122016-013, Pascual, FormA3-ResearchProtocol-21Jan2021, Mod_17, 01-22-21 (3)  
 
 
12.2 Pediatric Populations 
Although this medical food is not yet approved for use in adults, the need for 
early intervention in many neurological disorders has led us to propose this trial. 
As mentioned previously, there is no history, in our experience, of adverse 
events related to triheptanoin use in either adult populations or in our small pilot 
sample. Additionally, subjects with G1D typically manifest symptoms very young, 
and it is still unclear as to whether impairment in adulthood is the result of the 
disorder or of chronic, unmanageable seizures throughout childhood and 
adolescence. Finally, this rare disorder has no treatment options that address all 
facets of the disorder: seizures, movement disorders, and neuropsychological 
impairment ([4] and personal observations). Very few children with G1D grow into 
adults who are capable of holding a job and living independently (personal 
observations of PI), which describes a critical need for improvement in treatment 
for this population. 
 
13. PUBLICATION OF RESEARCH FINDINGS 
 
Any presentation, abstract, or manuscript will be made available for review by the 
NINDS prior to submission. All publications will meet ethical requirements for reporting 
patient data and institutional requirements for reporting conflict of interest. 


47 
 
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Version 6 
 
 
01/21/2021 
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14. REFERENCES 
 
1. 
Pascual JM, Liu P, Mao D, Kelly DI, Hernandez A, Sheng M, et al. Triheptanoin for 
glucose transporter type I deficiency (G1D): modulation of human ictogenesis, cerebral 
metabolic rate, and cognitive indices by a food supplement. JAMA Neurol. 2014;71(10):1255-
65. 
2. 
Pascual JM, Wang D, Hinton V, Engelstad K, Saxena CM, Van Heertum RL, et al. Brain 
glucose supply and the syndrome of infantile neuroglycopenia. Arch Neurol. 2007;64(4):507-
13. 
3. 
Pascual JM, Wang D, Lecumberri B, Yang H, Mao X, Yang R, et al. GLUT1 deficiency 
and other glucose transporter diseases. Eur J Endocrinol. 2004;150(5):627-33. 
4. 
Wang D, Pascual JM, De Vivo D. Glucose Transporter Type 1 Deficiency Syndrome. 
2012. 
5. 
Wang D, Pascual JM, Yang H, Engelstad K, Jhung S, Sun RP, et al. Glut-1 deficiency 
syndrome: clinical, genetic, and therapeutic aspects. Ann Neurol. 2005;57(1):111-8. 
6. 
Pascual JM, Wang D, Yang R, Shi L, Yang H, De Vivo DC. Structural signatures and 
membrane helix 4 in GLUT1: inferences from human blood-brain glucose transport mutants. J 
Biol Chem. 2008;283(24):16732-42. PMCID: 2423257. 
7. 
Marin-Valencia I, Good LB, Ma Q, Arning E, Bottiglieri T, Jeffrey FM, et al., editors. 
Glycolysis, citric acid cycle flux and neurotransmitter synthesis in mouse brain by 13C NMR 
spectroscopy Society for Neuroscience Annual Meeting; 2009; Chicago. 
8. 
Marin-Valencia I, Good LB, Ma Q, Malloy CR, Pascual JM. Heptanoate as a neural fuel: 
energetic and neurotransmitter precursors in normal and glucose transporter I-deficient (G1D) 
brain. J Cereb Blood Flow Metab. 2013;33(2):175-82. PMCID: 3564188. 
9. 
Roe CR, Bottiglieri T, Wallace M, Arning E, Martin A. Adult Polyglucosan Body Disease 
(APBD): Anaplerotic diet therapy (Triheptanoin) and demonstration of defective methylation 
pathways. Mol Genet Metab. 2010;101(2-3):246-52. 
10. 
Roe CR, Mochel F. Anaplerotic diet therapy in inherited metabolic disease: therapeutic 
potential. J Inherit Metab Dis. 2006;29(2-3):332-40. 
11. 
Roe CR, Sweetman L, Roe DS, David F, Brunengraber H. Treatment of cardiomyopathy 
and rhabdomyolysis in long-chain fat oxidation disorders using an anaplerotic odd-chain 
triglyceride. J Clin Invest. 2002;110(2):259-69. PMCID: 151060. 
12. 
Roe CR, Yang BZ, Brunengraber H, Roe DS, Wallace M, Garritson BK. Carnitine 
palmitoyltransferase II deficiency: successful anaplerotic diet therapy. Neurology. 
2008;71(4):260-4. 
13. 
Brunengraber H, Roe CR. Anaplerotic molecules: current and future. J Inherit Metab 
Dis. 2006;29(2-3):327-31. 
14. 
Mochel F, DeLonlay P, Touati G, Brunengraber H, Kinman RP, Rabier D, et al. Pyruvate 
carboxylase deficiency: clinical and biochemical response to anaplerotic diet therapy. Mol 
Genet Metab. 2005;84(4):305-12. 
15. 
Kaufmann P, Engelstad K, Wei Y, Kulikova R, Oskoui M, Battista V, et al. Protean 
phenotypic features of the A3243G mitochondrial DNA mutation. Arch Neurol. 2009;66(1):85-
91. 
16. 
Kaufmann P, Engelstad K, Wei Y, Jhung S, Sano MC, Shungu DC, et al. 
Dichloroacetate causes toxic neuropathy in MELAS: a randomized, controlled clinical trial. 
Neurology. 2006;66(3):324-30. 


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17. 
Schmahmann JD, Gardner R, MacMore J, Vangel MG. Development of a brief ataxia 
rating scale (BARS) based on a modified form of the ICARS. Mov Disord. 2009;24(12):1820-8. 
PMCID: 3800087. 
18. 
Guy W. ECDEU Assessment Manual for Psychopharmacology —Revised. In: U.S. 
Department of Health E, and Welfare, Public Health Service, Alcohol, Drug Abuse, and Mental 
Health Administration, editor. Rockville, MD: NIMH Psychopharmacology Research Branch, 
Division of Extramural Research Programs; 1976. p. 218-22. 
19. 
Carpay JA, Vermeulen J, Stroink H, Brouwer OF, Boudewyn Peters AC, Aldenkamp AP, 
et al. Parent-reported subjective complaints in children using antiepileptic drugs: what do they 
mean? Epilepsy Behav. 2002;3(4):322-9. 
20. 
Cramer JA, Smith DB, Mattson RH, Delgado Escueta AV, Collins JF. A method of 
quantification for the evaluation of antiepileptic drug therapy. Neurology. 1983;33(3 Suppl 
1):26-37. 
21. 
Varni JW, Seid M, Rode CA. The PedsQL: measurement model for the pediatric quality 
of life inventory. Med Care. 1999;37(2):126-39. 
22. 
Grinnon ST, Miller K, Marler JR, Lu Y, Stout A, Odenkirchen J, et al. National Institute of 
Neurological Disorders and Stroke Common Data Element Project - approach and methods. 
Clin Trials. 2012;9(3):322-9. PMCID: 3513359. 
23. 
Varni JW, Seid M, Kurtin PS. PedsQL 4.0: reliability and validity of the Pediatric Quality 
of Life Inventory version 4.0 generic core scales in healthy and patient populations. Med Care. 
2001;39(8):800-12. 
24. 
Simon R. Optimal two-stage designs for phase II clinical trials. Control Clin Trials. 
1989;10(1):1-10. 
25.   Snitz BE, Bieliauskas LA, Crossland A, Basso MR, Roper B.  PPVT-R as an estimate of 
premorbid intelligence in older adults.  The Clinical Neuropsychologist. 2000;14(2): 181-186. 
26. 
Akman CI, Engelstad K, Hinton VJ, Ullner P, Koenigsberger D, Leary L, Wang D, De 
Vivo DC. Acute hyperglycemia produces transient improvement in glucose transporter type 1 
deficiency. Annals of Neurology Ann Neurol. 2010; 67(1): 31-40.  
27. 
Ramm-Pettersen A, Stabell KE, Nakken KO, Selmer KK. Does ketogenic diet improve 
cognitive function in patients with GLUT1-DS? A 6- to 17-month follow-up study. Epilepsy & 
Behavior. 2014; 39: 111-115.  
28. 
Masur D, Shinnar S, Cnaan A, Shinnar RC, Clark P, Wang J, Weiss EF, Hirtz DG, 
Glauser TA.  Pretreatment cognitive deficits and treatment effects on attention in childhood 
absence epilepsy. Neurology.  2013; 81(18): 1572-1580.  
29. 
Engle RW. Working memory capacity as executive attention. Current Directions in 
Psychological Science.  2002; 11(1): 19-23.  
30. 
Gazzaley A, Nobre AC. Top-down modulation: Bridging selective attention and working 
memory. Trends in Cognitive Sciences.  2012; 16(2): 129-135.  
31. 
Mccabe DP, Roediger, HL, Mcdaniel MA, Balota DA, Hambrick DZ. The relationship 
between working memory capacity and executive functioning: Evidence for a common 
executive attention construct. Neuropsychology: 2010; 24(2): 222-243.  
32. 
Harvey PD.  Clinical applications of neuropsychological assessment.  Dialogues in 
Clinical Neuroscience:  2012; 14(1): 91-99. 
33. 
Norman GR, Sloan JA, Wyrwich KW.  Interpretation of changes in health-related quality 
of life.  Medical Care:  2003; 41(5):  582-592.  
 

ICF_001.pdf: 
INFORMED CONSENT FORM 
 
Dietary treatment of Glucose Transporter Type 1 
Deficiency (G1D). 
 
 
NCT number:  NCT03181399 
IRB Approved date: 01-22-21 


STU122016-013, Pascual, FormE-Consent-21Jan2021, Mod_17, 01-22-21 
 
 
Page 1 of 13 
Do Not Disclose 
Version 21Jan2021 
The University of Texas Southwestern Medical Center  
Parkland Health & Hospital System 
Children’s Medical Center 
Retina Foundation of the Southwest 
Texas Scottish Rite Hospital for Children 
Texas Health Presbyterian Hospital Dallas 
 
CONSENT TO PARTICIPATE IN RESEARCH 
 
Title of Research: 
Dietary treatment of Glucose Transporter Type 1 
Deficiency (G1D) 
 
Funding Agency/Sponsor: 
National Institutes of Neurological Disorders and Stroke 
 
(NINDS) 
 
Study Doctors: 
Juan M Pascual, MD, PhD 
 
Deepa Sirsi, MD  
 
Saima Kayani, MD 
 
 
You may call these study doctors or research personnel during regular office hours at 
214-456-2768.  At other times, you may call a doctor on call at the same number and 
follow the instructions. 
 
Note: If you are a parent or guardian of a minor and have been asked to read and sign 
this form, the “you” in this document refers to the minor. 
 
Instructions: 
Please read this consent form carefully and take your time making a decision about 
whether to participate.  As the researchers discuss this consent form with you, please ask 
him/her to explain any words or information that you do not clearly understand.  The 
purpose of the study, risks, inconveniences, discomforts, and other important information 
about the study are listed below.  If you decide to participate, you will be given a copy of 
this form to keep. 
 
Why is this study being done? 
The study is being done to find out whether an investigational dietary agent called 
triheptanoin (C7 oil) can treat your condition (Glucose Transporter Type 1 Deficiency or 
G1D) better or more safely than standard medication.  
 
The word “investigational” means the triheptanoin is still being tested in research 
studies and has been approved by the U.S. Food and Drug Administration (FDA) for 
use in this research. 
 
Why is this considered research?  
This is a research study because triheptanoin  is not FDA approved for any purpose, 
and that the study is being done to see if it can treat G1D better or more safely than 
IRB Approved Date: 1/22/2021


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Version 21Jan2021 
standard medication.  The FDA has not approved triheptanoin consumption for any 
other general purpose. 
 
The following definitions may help you understand this study:  
 Standard medical care means the regular care you would receive from your 
personal doctor if you choose not to participate in this research. 
 Researchers means the study doctor and research personnel at the University of 
Texas Southwestern Medical Center at Dallas and its affiliated hospitals. 
 
Why am I being asked to take part in this research study? 
You are being asked to take part in this study because you have been diagnosed with 
G1D and are either on a modified Atkins diet or are not currently on dietary therapy.   
 
 
Do I have to take part in this research study? 
No.  You have the right to choose whether you want to take part in this research study.  
If you decide to participate and later change your mind, you are free to stop participation 
at any time. 
 
If you decide not to take part in this research study it will not change your legal rights or 
the quality of health care that you receive at this center. 
 
How many people will take part in this study? 
About 50 people will take part in this study at UT Southwestern or Children’s Medical 
Center.  
 
What is involved in the study? 
If you volunteer to take part in this research study, you will be asked to sign this consent 
form and will have the following tests and procedures.  Some of the procedures may be 
part of your standard medical care, but others are being done solely for the purpose of 
this study. 
 
If you live out-of-state or outside the United States, you will be given the choice to 
consent to this study over the telephone or in person. This will help minimize your travel 
time and travel costs.  
 
Screening Procedures 
To help decide if you qualify to be in this study, the researchers will ask you 
questions about your health, including medications you take and any surgical 
procedures you have had. 
 
You may also have to fill out certain forms or have the following exams, tests or 
procedures: 
 
 Documentation of Glucose Transporter Type 1 Deficiency (G1D) (including 
genotyping) 
 Medical/Treatment History 
IRB Approved Date: 1/22/2021


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 Pregnancy testing (if applicable) 
 Seizure diary 
 
 
Study Medication/Intervention 
If you decide to participate in this study you will take triheptanoin 4 times a day, as a 
replacement for part of the fat in your diet. The amount of oil you will take each day 
will be determined based on your nutritional consult with the registered dietician. 
 
Procedures and Evaluations during the Research 
 
EEG, Visits 1, 2, and3: Electroencephalogram (EEG) will be performed at visits 1, 
2, and 3. This will take place at Children's Medical Center. No sedation, special 
medications or injections will be used to complete these procedures. We expect that 
EEG lead placement will take approximately 1 hour. The EEG will remain in place for 
up to 24 hours. The EEG in this study is designed for research, to evaluate any brain 
wave abnormalities. You will be told if notice any important changes. You and your 
regular doctor can decide together whether to follow up with more tests or treatment. 
Because the EEG and blood studies done in this study are not for medical purposes, 
only select or no research results will be sent to you or to your regular doctor.  
 
Neuropsychological evaluation will occur at visit 1, visit 2, and visit 3: You will 
undergo an evaluation to measure your mood, how well you adapt to situations and 
change, and a standardized test to evaluate how well you think and solve problems. 
These tests will take approximately 2 hours  to complete, and will be completed at 
every visit.  
 
 
Screening  
Screening and pre-entry evaluations may occur concurrently. All screening activities 
are consistent with standard of care. Screening includes documentation of 
diagnosis, medical history, and pregnancy testing if appropriate. 
 
 
Pre-Entry Day 1 
The first day of your visit is Pre-entry Day 1. Pre-entry assessments consist of 
clinical assessment and a targeted physical exam. Neuropsychological testing will 
be done on the same day in the afternoon. Neuropsychological testing is 
questionnaires designed to test intelligence, memory and comprehension. 
 
On day one or day two, you will have a blood draw to evaluate hematology, 
chemistry, and lipid panel. We will obtain blood that is left over from the blood draws 
or draw additional blood, if needed, to measure the amount of C7 ketones. Providing 
this extra blood is optional. You will be started on-intervention the day after 
screening and pre-entry evaluations. We will also draw additional blood after you 
take the two doses of C7 oil to measure the amount of C7 ketones. Providing this 
extra blood is optional also. You will receive your initial doses of triheptanoin under 
IRB Approved Date: 1/22/2021


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24 hour inpatient stay to ensure your safety. You will have neuropsychological 
testing on the day of discharge, in the afternoon.  
 
Each month between Visit 1 and 2, the research coordinator will contact you to 
evaluate adherence and tolerability. Additionally, you will complete a monthly seizure 
log. On month two you will complete  safety blood work at a local clinical laboratory 
and have the results returned to Dr. Juan Pascual at UT Southwestern Medical 
Center. If you do not comply with the month two blood draw you may have the 
delivery of oil delayed until you return to compliance with the protocol.  
 
6 Month Visit 
You will return for a discontinuation visit at 6 months after initiation of treatment. You 
undergo essentially the same set of evaluations completed at enrollment. You will 
complete a medical history, clinical visit, physical exam, pregnancy test if  
appropriate, and neuropsychological testing on the first day of the visit. On day one 
or day two, you will have a blood draw to evaluate hematology, chemistry, and lipid 
panel. We will obtain blood that is left over from the blood draws or draw additional 
blood, if needed, to measure the amount of C7 ketones. Providing this extra blood is 
optional. You will also have a fasting EEG. You will have one final dose of oil for the 
purposes of the EEG, at the dose you are accustomed to taking therapeutically. At 
that point, you will be discontinued from the oil. You will return on day 2 for off-oil 
neuropsychological testing. 
 
9 month Visit 
You will return for a study exit visit 3 months after completing C7 treatment. You will 
complete a medical history, clinical visit, physical exam, pregnancy test, and 
neuropsychological testing on the first day of the visit. On day one or day two, you 
will have a blood draw to evaluate hematology, chemistry, and lipid panel. You will 
also have a fasting EEG.  
 
The movement scale, clinical global impression scale (CGI), side effect assessment, 
neuropsychological evaluations, nutritional assessment, genotyping (if necessary), 
EEG, and metabolite evaluations in this study are designed for research not for 
medical purposes.  They are not useful for finding problems or diseases.  Even 
though the researchers are not looking at the results of these evaluations to find or 
treat a medical problem, you will be told if they notice something unusual.  You and 
your regular doctor can decide together whether to follow up with more tests or 
treatment. Because these evaluations are not for medical purposes, the research 
results will not be sent to you or to your regular doctor. You may request a copy of 
the results of the clinical exam and laboratory work to be sent to your doctor at the 
conclusion of the study. 
 
IRB Approved Date: 1/22/2021


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How long can I expect to be in this study? 
1 Optional 
 
Your participation in this study will be approximately 9 months. You will receive the 
dietary agent for 6 months, and will then be asked to return at 9 months for a follow up 
visit. 
 
You can choose to stop participating for any reason at any time.  However, if you decide 
to stop participating in the study, we encourage you to tell the researchers.  You may be 
asked if you are willing to complete some study termination tests. 
 
  
  
Visit 1*  
Pre-Entry and Entry  
Monthly 
Phone Calls 
Visit 2 (±7 days) 
6 mo. on-oil 
Visit 3 (±7 days) 
3 mo. off-oil 
Evaluation 
Screen 
-1 month 
Day 1 
Pre-Entry 
and Entry 
Day 2 
Entry  
Months 1-5 
Day 1 
On oil 
Day 2 
Off oil 
Day 1 
Day 2 
Informed Consent 
  
X 
  
  
  
  
  
  
Documentation of 
Disease/Disorder 
X 
X 
  
  
X 
  
X 
  
Medical/Treatment 
History 
X 
X 
  
  
X 
  
X 
  
Clinical Assessment 
  
X 
  
  
X 
  
X 
  
Targeted Physical 
Exam 
  
X 
  
  
X 
  
X 
  
Ataxia Scale 
  
X 
  
  
X 
  
X 
  
Clinical Global 
Impression 
  
X 
  
  
X 
  
X 
  
Side Effect 
Assessment 
  
X 
  
X 
X 
  
X 
  
Pregnancy Testing 
  
X 
  
  
 X  
  
  
  
Neuropsychological 
tests  
  
X 
 X 
  
X 
X 
X 
 
Nutritional 
Assessment 
  
X 
  
X 
X 
  
X 
  
Seizure Count 
  
X 
  
X 
X 
  
X 
  
Inpatient 
  
Admit: 
Noon 
D/C: 
Noon 
  
Admit: 
Noon 
D/C: 
Noon 
Admit: 
Noon 
D/C: 
Noon 
Continuous EEG 
  
X 
X 
  
X 
X 
 X 
X 
Laboratory 
Evaluations: 
Hematology, 
Chemistry Day 1 or 
Day 2 
  
X  
X 
X 
 X 
X 
 X 
X 
Blood collection to 
measure C7 
ketones1 
 
X 
X 
 
X 
X 
 
 
Triheptanoin  
Supplementation 
  
 
Start 
  
  
End 
  
  
IRB Approved Date: 1/22/2021


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What are the risks of the study? 
 
Study Procedure/Intervention 
Because of your participation in this study, you are at risk for the following side effects. 
You should discuss these with the researchers and your regular health care provider.  
 
Triheptanoin may cause some, all or none of the side-effects listed below.  
 
Frequent 
 mild diarrhea 
 
Occasionally 
 gastric discomfort 
 Weight gain 
 
Rare 
 none 
 
Serious but Rare 
 none 
 
 
Psychological Stress 
Some of the questions we will ask you as part of this study may make you feel 
uncomfortable.  You may refuse to answer any of the questions, take a break or stop 
your participation in this study at any time. 
 
Loss of Confidentiality 
Any time information is collected; there is a potential risk for loss of confidentiality.  
Every effort will be made to keep your information confidential; however, this cannot be 
guaranteed.  
 
Risks to Sperm, Embryo, Fetus or Breast-fed Infant 
Males: Being in this research may damage your sperm, which could cause harm to a 
child that you may father while on this study. If you take part in this study and are 
sexually active, you must agree to use a medically-acceptable form of birth control. 
Medically-acceptable forms of birth control include: 
(1) surgical sterilization (vasectomy), or 
(2) a condom used with a spermicide (a substance that kills sperm). 
 
Females: If you are part of this study while pregnant or breast-feeding an infant, it is 
possible that you may expose the unborn child or infant to risks.  For that reason, 
pregnant and breast-feeding females cannot participate in the study.  If you can become 
pregnant, a blood pregnancy test will be done (using 1 teaspoon of blood drawn from a 
vein by needle-stick), and it must be negative before you participate in this study. If you 
take part in this study and you are sexually active, you and any person that you have 
sex with must use medically-acceptable birth control (contraceptives) during the study.  
Medically-acceptable birth control (contraceptives) includes: 
(1) surgical sterilization (such as hysterectomy or “tubes tied”), 
(2) approved hormonal contraceptives ( such as birth control pills, patch or ring; 
Depo-Provera, Implanon), 
IRB Approved Date: 1/22/2021


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(3) barrier methods (such as condom or diaphragm) used with a spermicide (a 
substance that kills sperm), or  
(4) an intrauterine device (IUD). 
If you do become pregnant during this study, you must tell the researchers immediately. 
 
Risks of Blood Drawing 
Risks associated with IV include minimal discomfort and/or bruising.  Infection, excess 
bleeding, clotting, and/or fainting also are possible, although unlikely. 
 
You will have approximately 12 tablespoons of blood collected because you are in this 
research study. 
 
EEG 
You may experience mild discomfort due to the electrode gel and cap placed on head or 
slight itchiness due to the cap. 
 
Other Risks 
There may possibly be other side effects that are unknown at this time. If you are 
concerned about other, unknown side effects, please discuss this with the researchers. 
 
How will risks be minimized or prevented?   
The researchers will make every effort to keep you comfortable during the scan as well 
as during blood draws.  If you are too uncomfortable at any time, please tell the study 
doctor and we will stop the study right away.  Your standard clinical care will not be 
affected. 
 
What will my responsibilities be during the study?   
While you are part of this study, the researchers will follow you closely to determine 
whether there are problems that need medical care.  It is your responsibility to do the 
following: 
 Ask questions about anything you do not understand. 
 Keep your appointments. 
 Follow the researchers’ instructions. 
 Let the researchers know if your telephone number or address changes. 
 Tell the researchers before you take any new medication, even if it is prescribed 
by another doctor for a different medical problem or something purchased over 
the counter. 
 Tell your regular doctor about your participation in this study. 
 Report to the researchers any injury or illnesses while you are on study even if 
you do not think it is related.  
 
If I agree to take part in this research study, will I be told of any new risks that 
may be found during the course of the study? 
Yes.  You will be told if any new information becomes available during the study that 
could cause you to change your mind about continuing to participate or that is important 
to your health or safety. 
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What should I do if I think I am having problems? 
If you have unusual symptoms, pain, or any other problems while you are in the study, 
you should report them to the researchers right away.  Telephone numbers where they 
can be reached are listed on the first page of this consent form. 
 
If you have a sudden, serious problem, like difficulty breathing or severe pain, go to the 
nearest hospital emergency room, or call 911 (or the correct emergency telephone 
number in your area).  Tell emergency personnel about any medications you are taking, 
including any medications you are taking for this study.   
 
What are the possible benefits of this study? 
If you agree to take part in this study, there may be direct benefits to you, as prior 
studies with patients diagnosed with other metabolic disorders taking the triheptanoin 
diet have noticed a decrease of progression of their illness. However, the researchers 
cannot guarantee that you will benefit from participation in this research. 
 
We hope the information learned from this study will benefit others with G1D in the 
future.  Information gained from this research could lead to better detection, earlier 
diagnosis and improved treatment. 
 
What options are available if I decide not to take part in this research study? 
You do not have to participate in this research to receive care for your medical problem. 
Instead of being in this study, you have the following options: 
 Ketogenic diet 
 Medication treatment for individual symptom management 
 
Please talk to the researchers or your personal doctor about these options.  
 
Will I be paid if I take part in this research study? 
Yes.  You will be paid $250.00 at each regular study visit (enrollment visit, 6 month fol-
low up, and 9 month follow up).  If you stop taking part in this study or are withdrawn by 
the research team, you will receive payment for only the visits you have completed.  For 
example, if you complete 2 study visits you will be paid $500.00 total. 
 
Your Social Security Number (SSN) will be given to The University of Texas 
Southwestern Medical Center in order to process your payment as required by law.  
This information will remain confidential unless you give your permission to share it with 
others, or if we are required by law to release it. 
 
If you are an employee of UT Southwestern, your payment will be added to your regular 
paycheck and income tax will be deducted. 
 
UT Southwestern, as a State agency, will not be able to make any payments to you for 
your participation in this research if the State Comptroller has issued a “hold” on all 
State payments to you.  Such a “hold” could result from your failure to make child sup-
IRB Approved Date: 1/22/2021


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port payments or pay student loans, etc.  If this happens, UT Southwestern will be able 
to pay you for your taking part in this research 1) after you have made the outstanding 
payments and 2) the State Comptroller has issued a release of the “hold.” 
 
You will be reimbursed for your parking expenses, transportation to and from the 
research center (for example air fare or gasoline), hotel, and car rental costs, up to 
$1220 for each visit. You will also be reimbursed for your month two lab draw blood 
work up to $1750. In order to receive reimbursement, you will need to turn in all your 
receipts to the research coordinator. 
 
How will I be paid?  
You will be issued a UT Southwestern Greenphire ClinCard, which can be used as a 
credit or debit card. You will also receive instructions on how to use the card.  In order 
to receive study payments, your name, address, date of birth and Social Security 
Number (SSN) will be collected from you by the research staff.  All information will be 
stored in a secure fashion and will be deleted from the UT Southwestern Greenphire 
ClinCard system once the study has been completed.   
 
 
Will my insurance provider or I be charged for the costs of any part of this 
research study? 
No. Neither you, nor your insurance provider, will be charged for anything done only for 
this research study (i.e., the Screening Procedures, Experimental Procedures, or 
Monitoring/Follow-up Procedures described above).   
 
However, the standard medical care for your condition (care you would have received 
whether or not you were in this study) is your responsibility (or the responsibility of your 
insurance provider or governmental program).  You will be charged, in the standard 
manner, for any procedures performed for your standard medical care. 
 
What will happen if I am harmed as a result of taking part in this study? 
It is important that you report any illness or injury to the research team listed at the top 
of this form immediately. 
 
Compensation for an injury resulting from your participation in this research is not 
available from the University of Texas Southwestern Medical Center at Dallas or 
Children’s Medical Center. 
 
You retain your legal rights during your participation in this research 
 
Can I stop taking part in this research study? 
Yes.  If you decide to participate and later change your mind, you are free to stop taking 
part in the research study at any time. 
 
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If you decide to stop taking part in this research study, it will not affect your relationship 
with the UT Southwestern staff or doctors.  Whether you participate or not will have no 
effect on your legal rights or the quality of your health care. 
 
If you are a medical student, fellow, faculty, or staff at the Medical Center, your status 
will not be affected in any way. 
 
If you are a clinic patient of Dr. Juan Pascual, , Dr. Saima Kayani, or Dr. Deepa Sirsi, 
the following statement applies to you: Your doctor is a research investigator in this 
study.  S/he is interested in both your medical care and the conduct of this research 
study.  At any time, you may discuss your care with another doctor who is not part of 
this research study.  You do not have to take part in any research study offered by your 
doctor. 
 
If I agree to take part in this research study, can I be removed from the study 
without my consent? 
Yes.  The researchers may decide to take you off this study if: 
 Your medical problem remains unchanged or becomes worse. 
 The researchers believe that participation in the research is no longer safe for 
you. 
 The researchers believe that other treatment may be more helpful. 
 The sponsor or the FDA stops the research for the safety of the participants. 
 The sponsor cancels the research. 
 You are unable to keep appointments or to follow the researcher’s instructions. 
 
Will my information be kept confidential? 
Medical information collected during this study and the results of any test or procedure 
that may affect your medical care may be included in your medical record. The 
information included in your medical record will be available to health care providers 
and authorized persons including your insurance company. 
 
You should know that certain organizations that may look at and/or copy your medical 
records for research, quality assurance, and data analysis include: 
 
• 
National Institute for Neurological Disorders and Stroke 
 
The University of Chicago (Dr. Douglas Nordli). This is another researcher and 
research facility that is working with UT Southwestern on the Research Project. 
• 
Representatives of government agencies, like the U.S. Food and Drug 
Administration (FDA), involved in keeping research safe for people; and 
• 
The UT Southwestern Institutional Review Board.  
 
A description of this clinical trial will be available on http://www.ClinicalTrials.gov, as 
required by U.S. Law.  This Web site will not include information that can identify you.  
At most, the Web site will include a summary of the results.  You can search this Web 
site at any time. 
 
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In addition to this consent form, you will be asked to sign an "Authorization for Use and 
Disclosure of Protected Health Information."  This authorization will give more details 
about how your information will be used for this research study, and who may see 
and/or get copies of your information. 
 
Are there procedures I should follow after stopping participation in this research? 
Yes.  If you, the researchers, or the sponsor stops your participation in the research, 
you may be asked to do the following: 
 
 Let the researchers know immediately that you wish to withdraw from the 
research. 
 Return to the research center for tests that may be needed for your safety. 
 Return any unused study materials, including empty containers. 
 Discuss your future medical care, if any, with the researchers and/or your 
personal doctor. 
 
If you wish to discontinue the oil before 6 months, we will ask you to come in for a 
discontinuation visit as soon as feasible and remain on the oil until you return. If you 
wish to discontinue prior to your exit visit due to intolerable side effects, you will be 
provided instruction on discontinuation, and you will be asked to come in for a final 
visit as soon as feasible. You will complete a medical history, clinical visit, physical 
exam, pregnancy test, and neuropsychological testing on the first day of the exit 
visit. On day two, you will complete a fasting blood draw to evaluate hematology and 
chemistry. You will also have a fasting EEG and will be discontinued from the study 
at this visit. 
 
Whom do I call if I have questions or problems? 
For questions about the study, contact Dr. Juan Pascual at 214.456.2768.  At other times, 
you may call a doctor on call at the same number or at 214.456.7000 and follow the 
instructions. 
 
For questions about your rights as a research participant, contact the UT Southwestern 
Institutional Review Board (IRB) Office at 214-648-3060. 
 
 
 
 
 
 
 
 
 
 
 
 
IRB Approved Date: 1/22/2021


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SIGNATURES: 
 
YOU WILL BE GIVEN A COPY OF THIS CONSENT FORM TO KEEP. 
 
Your signature below certifies the following: 
 
 You have read (or been read) the information provided above. 
 You have received answers to all of your questions and have been told who to 
call if you have any more questions. 
 You have freely decided to participate in this research. 
 You understand that you are not giving up any of your legal rights. 
 You understand that a copy of this signed consent document, information about 
this study, and the results of any test or procedure that may affect your medical 
care, may be included in your medical record.  Information in your medical 
record will be available to health care providers and authorized persons 
including your insurance company. 
 
 
____________________________________________ 
 
 
Name of Participant (Printed) 
 
 
____________________________________________ 
________ 
_______ AM / PM 
Signature of Participant 
Date 
Time 
 
____________________________________________ 
 
 
Legally Authorized Representative’s Name (Printed) 
 
 
____________________________________________ 
________ 
_______ AM / PM 
Legally Authorized Representative’s Signature 
Date 
Time 
 
 
____________________________________________ 
 
 
Name of Person Obtaining Consent (Printed) 
 
 
____________________________________________ 
________ 
_______ AM / PM 
Signature of Person Obtaining Consent 
Date 
Time 
 
 
 
 
 
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ASSENT OF A MINOR: 
I have discussed this research study with my parent or legal guardian and the 
researchers, and I agree to participate. 
 
 
____________________________________________ 
________ 
_______ AM / PM 
Participant’s Signature (age 10 through 17) 
Date 
Time 
 
Interpreter Statement: 
I have interpreted this consent form into a language understandable to the participant 
and the participant has agreed to participate as indicated by their signature on the 
associated short form. 
 
 
____________________________________________ 
 
 
Name of Interpreter (Printed) 
 
 
____________________________________________ 
________ 
_______ AM / PM 
Signature of Interpreter 
Date 
Time 
 
IRB Approved Date: 1/22/2021