Clinical trial NCT05476783: A Long Term Extension Study to Assess the Safety of TB006 in Participants With Alzheimer's Disease
Official title: A Multi-center Open-label Long Term Extension Study to Assess the Safety of TB006 in Patients Who Have Completed Protocol TB006AD2102 and in De Novo Patients With Alzheimer's Disease
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE2
Conditions: Alzheimer's Disease
Keywords: Alzheimer's disease
Open-label Extension
TB006
TB006AD2102
De Novo
Lead sponsor: TrueBinding, Inc.
Sponsor class: INDUSTRY
First posted: 2022-07-27
Enrollment: 180
Sex: ALL
Minimum age (years): 50
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: This is an open-label long term extension study for participants with Alzheimer's disease (AD) who have completed Protocol TB006AD2102 (lead-in study) or participants who would have been eligible for the lead-in study but were not enrolled (de novo). The study is designed to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of TB006. The total study duration for each participant will be up to 113 weeks.

Detailed description: The total study duration for each participant will be up to 113 weeks \[This includes 101 weeks (2 years) of dosing and a 12-week safety follow-up period\]. The number of participants enrolled from the lead-in study will be 100 to 120 and additionally, up to 50 de novo participants, identified by the sponsor, may be included. A total of approximately 150 to 180 participants will be enrolled.

Eligibility criteria: Inclusion Criteria:

Lead-in study participants are eligible to be included in the study only if they meet the following criteria:

* Completed lead-in Protocol TB006AD2102 (Participants from both study drug and placebo groups) or are eligible for the lead-in study but were not enrolled (de novo).
* Eligibility must be reconfirmed by the investigator for participants who have a gap of more than 28 days between lead-in Protocol TB006AD2102 completion and enrolment in the current study. These participants will undergo the screening procedures in the current Open-label extension (OLE) protocol, with the exception of imaging.
* Contraceptive use by men should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
* Females must be of non-childbearing potential.
* Participants or caregiver has the ability to understand the purpose and risks of the study and provide signed and dated informed consent. Participants whose caregiver signs the informed consent must provide their assent.
* Either currently or previously (in pre-AD condition) literate and capable of reading, writing, and communicating effectively with others.
* Participants, along with the caregiver, will be compliant with study visits, procedure.

De novo participants, identified by the sponsor and referred to a participating site, are eligible to be included in the study only if all of the following criteria apply:

* Male and/or female \> 50 years of age at the time of signing the informed consent.
* Body weight of ≥ 50 kilograms (kg) and body mass index (BMI) between 18 and 35 kilograms per square meter (kg/m\^2), inclusive.
* MMSE score of 24 or less.
* Must be ambulatory.
* Clinical diagnosis of AD consistent with the following:

  1. Probable AD, according to National Institute of Neurological and Communicative Disorders and Stroke - Alzheimer's Disease and Related Disorders Association (NINCDS-ADRDA).
  2. Meets the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) - Criteria for Major Neurocognitive Disorder (previously dementia).
* Contraceptive use by men should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
* Females must be of non-childbearing potential.
* Participants or caregiver has the ability to understand the purpose and risks of the study and provide signed and dated informed consent. Participants whose caregiver signs the informed consent must provide their assent.
* Either currently or previously (in pre-AD condition) literate and capable of reading, writing, and communicating effectively with others.

Exclusion Criteria:

Lead-in study participants are excluded from the study if any of the following criteria apply:

* Development of an intolerable adverse event or an adverse event that was considered an important safety risk in Protocol TB006AD2102
* Any of the following emerging medical or psychiatric exclusion criteria as defined in the lead-in Protocol TB006AD2102:

  1. Any medical or neurological condition other than AD that in the opinion of the investigator could be a contributing cause of the Participant's dementia
  2. History within the past 6 months or evidence of clinically significant psychiatric illness like major depression, schizophrenia, or bipolar affective disorder
  3. Diagnosis of a dementia-related central nervous system (CNS) disease other than AD (eg, Parkinson's Disease, Huntington's Disease, frontotemporal dementia, multi-infarct dementia, dementia with Lewy bodies, or normal pressure hydrocephalus).
  4. Identification of other known cause of dementia or any other clinically significant contributing co-morbid pathologies at screening MRI
  5. Any contraindications to having a brain MRI eg, pacemaker; non-MRI compatible aneurysm clips, artificial heart valves, or other metal foreign body; claustrophobia)
  6. Any untreated or unstable clinically significant medical condition like hypertension, diabetes, chronic obstructive pulmonary disorder, asthma, or depression
  7. Any clinically significant findings in medical examination, including physical examination, 12-lead electrocardiogram (ECG), clinical laboratory tests.
  8. Undergone major surgery \<= 2 months before study drug administration.
  9. Loss of more than 100 milliliters (mL) blood (eg, a blood donation) within 2 months before first study drug administration, or has received any blood, plasma, or platelet transfusions within 3 months before Day 1, or plans to donate blood during the study or within 3 months after the study.
  10. Regular alcohol consumption within 6 months prior to the study defined as: an average weekly (QW) intake of \> 20 units for males or \> 16 units for females. One unit is equivalent to 8 grams (g) of alcohol.
  11. Meets DSM-5 criteria for moderate or severe substance use disorder within the past 12 months, or has a positive test for substances of abuse, or has used substances, including but not limited to opiates, methadone, buprenorphine, methamphetamine, cocaine, amphetamines recreationally within the past 12 months.
  12. Unable to complete this study for other reasons or the investigator believes the Participant should be excluded.
* Since participating in Protocol TB006AD2102, the participant has participated in another drug, biologic, device, or a clinical study or treatment with an investigational drug or approved therapy for investigational use.
* Any clinically significant findings in medical examination. This includes physical examination, 12-lead ECG, or clinical laboratory tests on the final visit in Protocol TB006AD2102 or on the Baseline visit in this study. Participants who are coronavirus disease of 2019 (COVID-19)-positive at Screening (or end of treatment \[EOT\] from lead-in study) must delay the start of the study until they are COVID-19-negative. They may be retested at weekly intervals.
* Participants who have undergone major surgery since enrolment in Protocol TB006AD2102 will be considered on a case-by-basis.

De Novo participants are excluded from the study if any of the following criteria apply:

* Any medical or neurological condition other than AD that in the opinion of the investigator could be a contributing cause of the participant's dementia
* History within the past 6 months or evidence of clinically significant psychiatric illness (eg, major depression, schizophrenia, or bipolar affective disorder).
* Diagnosis of a dementia-related CNS disease other than AD (eg, Parkinson's Disease, Huntington's Disease, frontotemporal dementia, multi-infarct dementia, dementia with Lewy bodies, normal pressure hydrocephalus).
* Identification of other known cause of dementia or any other clinically significant contributing co-morbid pathologies at screening MRI, in the opinion of the investigator.
* Participation in any other drug, biologic, device, or clinical study or treatment with any investigational drug or approved therapy for investigational use within 30 days (or 5 half-lives, whichever is longer) prior to screening, and/or participation in any other clinical study involving experimental medications for AD within the 60 days (or 5 half-lives, whichever is longer) prior to screening.
* Any contraindications to having a brain MRI eg, pacemaker; non-MRI-compatible aneurysm clips, artificial heart valves, or other metal foreign body; claustrophobia).
* Any untreated or unstable clinically significant medical condition (ie, hypertension, diabetes, chronic obstructive pulmonary disorder, asthma, depression, etc.) as judged by the investigator.
* Any clinically significant findings in medical examination, including physical examination, 12-lead ECG, clinical laboratory tests.
* Undergone major surgery \<= 2 months before study drug administration.
* Loss of more than 100 mL blood (eg, a blood donation) within 2 months before first study drug administration, or has received any blood, plasma, or platelet transfusions within 3 months before Day 1, or plans to donate blood during the study or within 3 months after the study.
* Recent (3-month) history of a positive COVID-19 test result or disease symptoms of COVID-19 disease such as shortness of breath, cough, rhinorrhea, and sore throat, etc.
* Known history of, or a positive test result for Hepatitis B surface antigen (HBsAg), immunoglobulin M antibody to Hepatitis B core antigen (IgM anti HBc), anti-hepatitis C virus antibodies (HCV), or human immunodeficiency virus (HIV) types 1 or 2 at screening. Participants with a documented history of treatment for Hepatitis C are otherwise eligible to participate.
* Regular alcohol consumption within 6 months prior to the study defined as: an average QW intake of \> 20 units for males or \> 16 units for females.
* Meets DSM-5 criteria for moderate or severe substance use disorder within the past 12 months, or has a positive test for substances of abuse, or has used substances, including but not limited to opiates, methadone, buprenorphine, methamphetamine, cocaine, amphetamines recreationally within the past 12 months.
* Unable to complete this study for other reasons or the investigator believes that he or she should be excluded.

Primary outcomes:
measure: Number of participants with adverse events (AEs) and serious adverse events (SAEs)
timeFrame: Up to 113 weeks
measure: Number of participants with Clinically Significant Clinical Laboratory Parameter Values
timeFrame: Up to 113 weeks
measure: Number of Participants with Clinically Significant Vital Sign Values
timeFrame: Up to 113 weeks
measure: Number of Participants with Clinically Significant 12-Lead electrocardiogram Findings
timeFrame: Up to 113 weeks
measure: Change from Baseline in Columbia Suicide Severity Rating Scale (C-SSRS)
timeFrame: Baseline and up to 113 weeks
measure: Number of Participants with Clinically Significant Physical Examination Findings
timeFrame: Up to 113 weeks
measure: Number of Participants with Clinically Significant Neurological Examination Findings
timeFrame: Up to 113 weeks
measure: Number of participants with magnetic resonance imaging (MRI) abnormalities
timeFrame: Up to 113 weeks
measure: Plasma concentration of TB006
timeFrame: Pre-dose, and Weeks 1, 5, 9, 13, 17, 21, 25, 45, 73, 101 and 113
measure: Number of Participants with Anti-TB006 Antibodies
timeFrame: Up to 113 weeks
Secondary outcomes:
measure: Change from Baseline in Clinical Dementia Rating Scale-Sum of Boxes (CDR SB) score
timeFrame: Baseline and up to Week 101
measure: Change from Baseline in cognitive functioning
timeFrame: Baseline and up to Week 101
measure: Change from Baseline in Mini Mental State Examination (MMSE) score
timeFrame: Baseline and up to Week 101
measure: Change from Baseline in Neuropsychiatry Inventory (NPI) score
timeFrame: Baseline and up to Week 101
measure: Change from Baseline in EuroQol 5 Dimension 5-Level quality of life (EQ 5D 5L QoL) total score
timeFrame: Baseline and up to Week 101
measure: Change from Baseline in brain atrophy measured by MRI
timeFrame: Baseline and up to Week 113
measure: Change from Baseline in amyloid plaque using positron emission tomography (PET) imaging
timeFrame: Baseline and up to Week 113
measure: Change from Baseline in brain volume using MRI
timeFrame: Baseline and up to Week 113
Other outcomes:
Locations:
city: San Diego
country: United States
facility: Clinical Trial Site
state: California
city: Delray Beach
country: United States
facility: Clinical Trial Site
state: Florida
city: Lady Lake
country: United States
facility: Clinical Trial Site
state: Florida
city: Maitland
country: United States
facility: Clinical Trial Site
state: Florida
city: Miami
country: United States
facility: Clinical Trial Site
state: Florida
city: Miami
country: United States
facility: Clinical Trial Site
state: Florida
city: Miami
country: United States
facility: Clinical Trial Site
state: Florida
city: West Palm Beach
country: United States
facility: Clinical Trial Site
state: Florida
city: Winter Park
country: United States
facility: Clinical Trial Site
state: Florida
city: Winter Park
country: United States
facility: Clinical Trial Site
state: Florida
city: Decatur
country: United States
facility: Clinical Trial Site
state: Georgia
city: Matthews
country: United States
facility: Clinical Trial Site
state: North Carolina
city: Fairfax
country: United States
facility: Clinical Trial Site
state: Virginia
Study officials:
References: