Clinical trial NCT02442115: Impact of Improving Gastrointestinal Symptoms on Autism Symptoms and Oxidative Stress
Official title: The MET Signaling System, Autism and Gastrointestinal Dysfunction
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Autistic Disorder
Constipation
Gastrointestinal Diseases
Keywords: Autism
Autism Spectrum Disorder (ASD)
Tummy Troubles
Constipation
GI Disorders
Gastrointestinal Disorders
Gastrointestinal
Oxidative Stress
Stomach problems
Behaviors
Autistic
ASD
MET gene
GID
Pediatric
Pediatric GI disorders
Children with Autism
functional constipation
Lead sponsor: Children's Hospital Los Angeles
Sponsor class: OTHER
First posted: 2015-05-13
Enrollment: 100
Sex: ALL
Minimum age (years): 5
Maximum age (years): 17
Standard ages: CHILD
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: Children with Autism Spectrum Disorders with and without functional constipation

Brief summary: The clinical manifestation of autism spectrum disorder (ASD) is complex, with medical and mental health disruptions that occur with the three core behavioral criteria used for diagnosis (social behavior, communication, restricted interests/repetitive behavior). Co-occurring medical conditions, such as gastrointestinal dysfunction (GID), often are overlooked when designing research strategies to understand the mechanisms underlying the expression of ASD. This study was initially a collaboration between Children's Hospital Los Angeles (CHLA) and the Children's Hospital at Vanderbilt University. The current research project proposes to recruit subject at CHLA and the Center for Autism and Developmental Disorders (CAND), a Children's Hospital of Orange County and University of California Irvine (UCI) Health collaborative program. In Aim 1, the investigators will characterize GID in pediatric populations with ASD. Over a 12 month period, subjects will receive standard of care for their GID, typically functional constipation. The study population will be characterized with a standardized instrument for diagnosing functional GI disorders in children, the Questionnaire on Pediatric Gastrointestinal Symptoms, and with the clinical acumen of an experienced pediatric gastroenterologist. Nutritional information also will be collected to determine whether there are patterns of GIDs that correlate with dietary and nutritional status. The in-depth characterization and treatment of GIDs in children with ASD will provide a unique way of determining if ASD symptom and GID symptom improvement are related to each other. In Aim 2, the investigators will do in-depth assessment of each subjects functional status for social communication, emotional regulation, cognitive function, speech-language, sensory integration, and a biomarker of oxidative stress. The latter will be measured in urine samples over the course of one year. There are no direct interventions for autism symptoms in this study. Rather, subjects will receive standard of care for the GID diagnosis and secondary effects on ASD symptoms will be evaluated. Our power calculation shows that the investigators will be adequately powered with the proposed study design and recruitment targets. As part of the study, the investigators have developed a collaboration with investigators in the University of Southern California (USC) School of Engineering, in which the investigators will work with them to develop computational tools to assist in the characterization of videotaped Autism Diagnostic Observation Schedule (ADOS-2) assessments.

Detailed description: Children ages 7 years 0 months to 12 years 11 months will be recruited into 1 clinical group (ASD+/FC+), utilizing the following clinics in Southern California:

CHLA-affiliated Clinics

* Boone-Fetter Clinic, home of the CHLA Autism Treatment Network
* University Center of Excellence on Developmental Disabilities (UCEDD) Clinic at CHLA - UC Irvine/Orange County-affiliated clinics
* Center for Autism and Neurodevelopmental Disorders in Orange County
* Children's Hospital of Orange County Exclusion criteria include a diagnosed syndromic disorder, prematurity, failure to meet standard birth weight, not enrolled in any ASD treatment program. For each child, the Questionnaire on Pediatric Gastrointestinal Symptoms (QPGS)-Rome III is administered and the child is seen by a board-certified pediatric gastroenterologist. The child will be seen at baseline, 3, 6 and 12 months for their research visits. Treatment of FC in children with ASD is based on the Autism Treatment Network (ATN) modified protocol of the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) and includes the following: 1) a thorough dietary history is reviewed and adjusted for introducing a diet rich in fiber (or supplements if able to be tolerated by the child; typically this will be in older children in the study); 2) assessment of abdominal pain, perianal skin tags, hemorrhoids, fissures, rectal exam if needed, frequency of stooling, quality of stool, rectal bleeding, other possible associated symptoms such as reflux/dyspepsia, vomiting, headaches, increase or decrease in appetite; 3) behavioral techniques, such as toileting after meal times, and other strategies are added; and 4) medicine and dietary adjustments are made. At each visit, the following instruments/questionnaires will be administered by a clinical psychologist: 1) social responsiveness scale; 2) Kaufman Brief Intelligence Test; 3) Child Behavior Checklist; 4) Aberrant Behavior Checklist; 5) Pediatric Quality of Life Inventory (Peds QL); 6) Repetitive Behavioral Scale-Revised; 7) Autism Impact Measure; 8) Pearson Short Sensory Profile. The Vineland will be administered at baseline and 12 months. The ADOS-2 will be used at baseline to ensure an ASD diagnosis.

At each visit, subject urine is collected and stored until an assay for the oxidative stress marker F2-isoprostane is measured.

A buccal swab is collected and DNA extracted for future genetic studies.

Eligibility criteria: Inclusion Criteria:

* English or Spanish-speaking of any ethnicity
* Boys or girls aged 5 years 0 months to 17 years 11 months

  * A clinical diagnosis of functional constipation (FC) for the ASD+/FC+ group, with or without encopresis
  * Clinical assessment of ASD using Diagnostic and Statistical Manual of Mental Disorders (DSM IV or V criteria)
  * ADOS-validated diagnosis of ASD
* Gestational age between 36 and 42 weeks
* Birth weight of at least 2500 grams

  * Children with suspected or an existing clinical diagnosis of ASD and FC will be recruited and consented for the study. Assessments and clinical diagnosis may be completed and confirmed through the Baseline study visit for subjects to be eligible.

    * Teacher participation is not required for child participation. However, teacher participation will be requested around the time of child enrollment.

Exclusion Criteria:

* Severe sensory or motor impairments (deafness, blindness;
* Identified inherited metabolic, syndromic, or progressive neurological disorders (including epilepsy, Down Syndrome, Rett Syndrome, Tuberous Sclerosis, Neurofibromatosis, Fragile X Syndrome);
* A non-functional GID, such as ulcerative colitis, Celiac disease or Hirschsprung's disease;
* Failure to meet birth weight/gestational age as noted above
* Participation in another ASD research study at the same time
* Not enrolled in an ASD intervention program

Primary outcomes:
measure: Reduction in F2-IsoProstanes (IsoPs) oxidative stress biomarker
timeFrame: 1 year
measure: Reduction in T-score from Social Responsiveness Scale (SRS-2) (Teacher questionnaire)
timeFrame: 1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Los Angeles
country: United States
facility: Children's Hospital Los Angeles
state: California
city: Santa Ana
country: United States
facility: The Center for Autism & Neurodevelopmental Disorders
state: California
Study officials:
affiliation: Children's Hospital Los Angeles
name: Pat Levitt, PhD
role: PRINCIPAL_INVESTIGATOR
References: