- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04262895
TTI-0102 for Veterans With TBI
TTI-0102, a Cysteamine Precursor for Mild to Moderate TBI: Dosing and Feasibility Study
Study Overview
Status
Intervention / Treatment
Detailed Description
Approximately 12-23% of returning service members report a history of traumatic brain injury, mostly mild (mTBI). Post-concussive symptoms such as memory problems, irritability, and difficulty concentrating are common after TBI and may become chronic, interfering with successful return to duty or civilian reintegration, reducing quality of life, and increasing health care utilization for Veterans. In those whose TBI-related symptoms persist, there is accumulating evidence for increased morbidity (e.g., worse PTSD symptoms, chronic hypopituitarism, dementia), spurring efforts to improve diagnosis and intervention. Following a primary TBI injury, secondary injury and persistent symptoms may evolve through a complex cascade of events that culminate in inflammation, alterations in mitochondrial bioenergetics, and diminished blood brain barrier integrity, ultimately yielding a chronic disease state. To date, Veterans receiving strategy-based cognitive rehabilitation for TBI (CCT/CogSMART) have shown improvement in cognition and subjective neuropsychiatric symptoms. CCT is an evidence-based cognitive rehabilitation intervention emphasizing training in cognitive strategies to improve post-concussive symptoms, attention, learning/memory, and executive functioning. However, no pharmaceuticals have been developed for direct or adjunct-to CCT use to maximize treatment outcomes.
Given that inflammation has been observed in TBI, PTSD, and in co-occurring TBI/PTSD, it may be an important aspect of the TBI/PTSD disease state that could be manipulated to promote healing. The investigators are proposing to study TTI-0102, a cysteamine precursor that shows anti-inflammatory activity, as a potential adjunct to CCT for Veterans with TBI-related symptoms. TTI-0102 is a safe, easily administered, highly-water soluble compound that readily crosses the blood brain barrier. Compared with cysteamine, TTI-0102 degrades more slowly, dampening peak drug concentrations and sustaining drug plasma concentrations in a narrow therapeutic range. Developed to treat cystinosis, cysteamine is now believed to have potential for treatment of neurodegenerative disorders.
The goal of this proof of concept study is first, in Phase I (Year 1), to use symptom change (i.e., objective cognitive performance and subjective cognitive and neuropsychiatric symptoms) and biological profiles (i.e., metabolomics, inflammatory peptides [interleukin-6 and C-reactive protein], and brain-derived neurotrophic factor) to learn optimal dosing of TTI-0102 and to assess mechanism of action, and in Phase II (Year 2), to implement a feasibility trial in Veterans with a history of mild to moderate TBI and PTSD. In Phase I, 3 groups of 10 Veterans each will be randomly assigned to receive TTI-0102 2 grams/day, 4 grams/day, or placebo for 12 weeks. Baseline and post-treatment measures of objective cognition and subjective cognitive and neuropsychiatric symptoms will be administered, and plasma will be collected to measure the metabolomic, inflammatory, and protein biomarkers. In Phase II (Year 2), 12 different Veterans (6 per group) will be enrolled in a pilot randomized controlled trial (RCT) to assess the feasibility and acceptability of trial procedures. Participants in Phase II will be randomized to receive TTI-0102 (dose determined in Phase I) or placebo for 12 weeks as an adjunct to evidence-based CCT. The results of these double-blind, placebo-controlled trials will be used to plan a larger, fully-powered trial.
Study Type
Phase
- Phase 2
- Phase 1
Contacts and Locations
Study Locations
-
-
California
-
San Diego, California, United States, 92161
- VA San Diego Healthcare System, San Diego, CA
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Veteran receiving care at the VA San Diego Healthcare system
- age 18-65
- history of mild to moderate TBI (loss of consciousness <24 hours; posttraumatic amnesia <7 days)
documented impairment (>1 standard deviation below the mean) in at least one neuropsychological domain as determined by valid clinical neuropsychological testing using at least one performance validity test, i.e.:
- attention
- processing speed
- working memory
- learning, memory
- executive functioning
- DSM-5 diagnosis of PTSD based on the Clinician-Administered PTSD Scale
Exclusion Criteria:
- current alcohol and/or substance abuse or dependence
- high risk for homicide or suicide
- evidence of a significant uncontrolled/unstable medical illness or clinically significant surgery
- laboratory values that are significantly outside normal limits
- history of intolerance or hypersensitivity to cysteamine or penicillamine
- current participation in other intervention studies
- pregnant or intending to become pregnant in the next 3 months
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Placebo
|
Placebo
|
Experimental: TTI-0102 2 mg/day
|
TTI-0102 is a cysteamine precursor.
|
Experimental: TTI-0102 4 mg/day
|
TTI-0102 is a cysteamine precursor.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Objective cognition
Time Frame: Change from 0 to 12 weeks
|
Mean z-score of objective cognitive measures (Wechsler Adult Intelligence Scale-4th Edition Digit Span, WAIS-IV Coding, Hopkins Verbal Learning Test-Revised, Brief Visuospatial Memory Test-Revised, Delis-Kaplan Executive Function System Trails, D-KEFS Color-Word Interference, D-KEFS Verbal Fluency)
|
Change from 0 to 12 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Subjective cognition
Time Frame: Change from 0 to 12 weeks
|
Mean z-score of subjective cognitive measures (Neuro-QOL Applied Cognition Executive Function, Neuro-QOL Applied Cognition General Concerns)
|
Change from 0 to 12 weeks
|
Neuropsychiatric symptoms
Time Frame: Change from 0 to 12 weeks
|
Mean z-score of subjective neuropsychiatric symptom measures (Neurobehavioral Symptom Inventory Patient Health Questionnaire-9, General Anxiety Disorder-7, Insomnia Severity Index, PTSD Checklist for DSM-5, WHO Disability Assessment Schedule 2.0)
|
Change from 0 to 12 weeks
|
high-sensitive C-reactive protein
Time Frame: Change from 0 to 12 weeks
|
high-sensitive C-reactive protein Plasma high sensitivity C-reactive protein (hsCRP) will be measured using the Quantikine HS ELISA kit.
The assay sensitivity is 10 pg/ml, the standard range is linear to 100 pg/ml, and intra- and inter-assay CVs are 4.1% and 6.5%, respectively.
|
Change from 0 to 12 weeks
|
interleukin-6
Time Frame: change from 0 to 12 weeks
|
interleukin-6 Plasma interleukin-6 (IL-6) will be measured using the Quantikine HS ELISA kit.
The assay sensitivity is 0.70 pg/ml, the standard range is linear to 100 pg/ml, and intra- and inter-assay CVs are 2.6% and 4.5%, respectively.
|
change from 0 to 12 weeks
|
brain-derived neurotrophic factor
Time Frame: change from 0 to 12 weeks
|
brain-derived neurotrophic factor We will use the Quantikine direct ELISA that selectively detects plasma levels of free brain-derived neurotrophic factor (BNDF) without measuring BDNF bound to blood protein that occurs with ELISAs that detect total BDNF.
Specificity of this BDNF immunoassay has been further confirmed by using Western blots to detect BDNF levels in plasma that were also measured with the Quantikine BDNF ELISA.
We will use our previously established protocol to increase ELISA sensitivity to <4 pg/ml and maximize performance by blocking nonspecific binding on the 96-well plate and optimizing incubation times and other variables for the Quantikine free BDNF ELISA.
The intra- and inter-assay CVs for the BDNF ELISA are 4.4% and 7.8%, respectively.
|
change from 0 to 12 weeks
|
kynurenine metabolism
Time Frame: change from 0 to 12 weeks
|
kynurenine metabolism Kynurenine metabolism will be assessed by broad-spectrum, targeted metabolomics using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS).
Paired samples from each participant will be analyzed comparing baseline and TTI-0102-associated changes.
|
change from 0 to 12 weeks
|
sphingolipid metabolism
Time Frame: change from 0 to 12 weeks
|
sphingolipid metabolism Sphingolipid metabolism will be assessed by broad-spectrum, targeted metabolomics using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS).
Paired samples from each participant will be analyzed comparing baseline and TTI-0102-associated changes.
|
change from 0 to 12 weeks
|
purine metabolism
Time Frame: change from 0 to 12 weeks
|
purine metabolism Purine metabolism will be assessed by broad-spectrum, targeted metabolomics using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS).
Paired samples from each participant will be analyzed comparing baseline and TTI-0102-associated changes.
|
change from 0 to 12 weeks
|
eicosanoid metabolism
Time Frame: change from 0 to 12 weeks
|
eicosanoid metabolism Eicosanoid metabolism will be assessed by broad-spectrum, targeted metabolomics using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS).
Paired samples from each participant will be analyzed comparing baseline and TTI-0102-associated changes.
|
change from 0 to 12 weeks
|
sulfur amino acid metabolism
Time Frame: change from 0 to 12 weeks
|
sulfur amino acid metabolism Sulfur amino acid metabolism will be assessed by broad-spectrum, targeted metabolomics using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS).
Paired samples from each participant will be analyzed comparing baseline and TTI-0102-associated changes.
|
change from 0 to 12 weeks
|
Collaborators and Investigators
Investigators
- Principal Investigator: Elizabeth W. Twamley, PhD, VA San Diego Healthcare System, San Diego, CA
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- N3323-P
- I21RX003323-01 (U.S. NIH Grant/Contract)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Access Criteria
IPD Sharing Supporting Information Type
- Study Protocol
- Statistical Analysis Plan (SAP)
- Informed Consent Form (ICF)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Posttraumatic Stress Disorder
-
University Hospital, ToursCompletedPostTraumatic Stress DisorderFrance
-
The University of Texas Health Science Center at...University of Pennsylvania; Brooke Army Medical Center; C.R.Darnall Army Medical... and other collaboratorsCompletedPosttraumatic Stress Disorder (PTSD)United States
-
Icahn School of Medicine at Mount SinaiCompletedPosttraumatic Stress Disorder (PTSD)United States
-
Berlin Center for the Treatment of Torture VictimsCompletedPosttraumatic Stress Disorder (PTSD)Germany
-
VA Office of Research and DevelopmentCompletedPosttraumatic Stress Disorder (PTSD)United States
-
Michael E. DeBakey VA Medical CenterSouth Central VA Mental Illness Research, Education & Clinical CenterCompletedPosttraumatic Stress Disorder (PTSD)United States
-
TEMPVA Research Group, Inc.C.R.Darnall Army Medical Center; VA Boston Healthcare System; Central Texas Veterans...UnknownPosttraumatic Stress Disorder, Combat-relatedUnited States
-
VA Office of Research and DevelopmentCompletedPosttraumatic Stress Disorder (PTSD)United States
-
VA Office of Research and DevelopmentCompleted
-
Yale UniversityNational Center for PTSDCompletedPosttraumatic Stress Disorder (PTSD)United States
Clinical Trials on Placebo
-
SamA Pharmaceutical Co., LtdUnknownAcute Bronchitis | Acute Upper Respiratory Tract InfectionKorea, Republic of
-
National Institute on Drug Abuse (NIDA)CompletedCannabis UseUnited States
-
AstraZenecaParexel; Spandauer Damm 130; 14050; Berlin, GermanyCompletedMale Subjects With Type II Diabetes (T2DM)Germany
-
Heptares Therapeutics LimitedCompletedPharmacokinetics | Safety IssuesUnited Kingdom
-
GlaxoSmithKlineCompletedPulmonary Disease, Chronic ObstructiveUnited Kingdom, Netherlands
-
ItalfarmacoCompletedBecker Muscular DystrophyNetherlands, Italy
-
Shijiazhuang Yiling Pharmaceutical Co. LtdXuanwu Hospital, BeijingCompleted
-
GlaxoSmithKlineCompletedInfections, BacterialUnited States
-
West Penn Allegheny Health SystemCompletedAsthma | Allergic RhinitisUnited States