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D-cycloserine: A Novel Treatment for Gulf War Illness (GWDCS)

D-cycloserine: A Novel Treatment for Gulf War Illness

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02983734
Acronym
GWDCS
Enrollment
22
Registered
2016-12-06
Start date
2015-10-01
Completion date
2019-09-15
Last updated
2026-09-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Gulf War Illness

Keywords

Gulf War, D-cycloserine, Neuroinflammation, Cognition, Memory

Brief summary

The purpose of this study is to investigate the efficacy of d-cycloserine (DCS) treatment for Gulf War Illness (GWI). Gulf War veterans with Gulf War Illness experience numerous chronic health symptoms, including cognition and fatigue, which reduces their quality of life. Gulf War veterans are in urgent need of novel treatment plans to tackle elusive symptomatology of Gulf War Illness. By using the literature of previous studies, the investigators have chosen to investigate d-cycloserine as a possible candidate for treating GWI, specifically cognitive symptoms. DCS has been shown to reduce neuroinflammation, regulate glutamate levels, and improve synaptic functioning in key areas of the brain.

Detailed description

Our study is a pilot study for the novel treatment of d-cycloserine to treat GWI. Our study will consist of two experimental groups of equal size (n=28): DCS treatment group and a placebo group. Participants will be randomized into either group; with a double blind study design. Participants will be instructed to self-administer their treatment pills once per day for 28 days. There will be a total of 6 study visits that will include medical and neuropsychological assessment. The first visit will be for establishing eligibility and baseline functioning. Three visits (visits 2-4) will occur during the medication trial (day 1, day 2 and two weeks into medication/placebo). Visit 5 will occur around the time medication/placebo is finished. Visit 6 (follow up) will occur one month after medication/placebo is complete.

Interventions

DRUGD-cycloserine

100mg of DCS will be administered orally in pill form daily for 4 weeks

DRUGPlacebo

A placebo will be administered orally daily for 4 weeks

Sponsors

Boston University Charles River Campus
Lead SponsorOTHER
United States Department of Defense
CollaboratorFED

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
43 Years to 85 Years
Healthy volunteers
No

Inclusion criteria

* Veterans of the 1991 Gulf War, male or female * Physical examination and laboratory findings within normal limits * Willingness and ability to participate in the informed consent process and comply with study protocols * Symptom criteria: Meets Gulf War Illness criteria with the cognitive symptom domain being present. Veteran does not have medical exclusions for Gulf War Illness

Exclusion criteria

* Veteran lacks the capacity to provide consent during the informed consent process * Veteran has the one of the following medical exclusion conditions and/or has been active or received treatment within the past 5 years: Cancer (except nonmelanoma skin cancer), diabetes (not well managed), seizure disorder, heart disease (except hypertension), liver disease, kidney disease, Lupus, multiple sclerosis, stroke, chronic infectious disease, immune disorder/immunosuppression * Veteran has a history of a major psychiatric or central nervous system disorder that can affect cognitive function (ie. epilepsy, brain tumor, Parkinson's Disease) * Veteran has been hospitalized in the past 5 years for depression, PTSD, alcohol or drug dependence * Veteran has current suicidal ideation or current alcohol or drug dependence * Pregnant women, lactating women, women who are breastfeeding, or women of childbearing potential who are not using medically accepted forms of contraception * Veteran is active duty personnel

Design outcomes

Primary

MeasureTime frameDescription
Immediate Recall Using the Logical Memory Test I8 weeksThe Logical Memory Test I will be used to evaluate immediate auditory memory and ability to recall details of orally presented stories right after hearing them. Two stories will be presented and each story contains 25 standard memory details (story units). A participant receives 1 point for every detail they successfully recall. Scores can range from 0 to 50.
Delayed Recall Using the Logical Memory Test II8 weeksThe Logical Memory Test II will be used to evaluate delayed auditory memory and ability to recall details of orally presented stories after a delay of 20-30 minutes after hearing them. Two stories will be presented and each story contains 25 standard memory details (story units). A participant receives 1 point for every detail they successfully recall. Scores can range from 0 to 50.

Secondary

MeasureTime frameDescription
Overall Psychological Distress or Negative Mood State8 weeksThe Total Mood Disturbance (TMD) score is a comprehensive metric used in psychology and sports science to quantify an individual's overall psychological distress or negative mood state. It is calculated directly from the 65 item Profile of Mood States (POMS) questionnaire where each item is scored on a 5-point Likert scale: 0 = Not at all, 1 = A little, 2 = Moderately, 3 = Quite a lot, 4 = Extremely. . The TMD score combines multiple subscales of mood by summing negative emotional dimensions and subtracting positive ones. Score ranges from -32 to 200. Higher Scores indicate a greater degree of mood disturbance, affective distress, or psychological stress.
Transient Emotional States and Mood Fluctuations Over Time8 weeksThe Profile of Mood States (POMS) is a standard, validated psychological test used to measure transient emotional states and mood fluctuations over time. It consists of 65 words or statements that describe different feelings and emotions. Each item is scored on a 5-point Likert scale: 0 = Not at all, 1 = A little, 2 = Moderately, 3 = Quite a lot, 4 = Extremely. Scores can range from 0-60.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORRosemary Toomey, Ph.D.

Boston University

Participant flow

Pre-assignment details

22 participants were enrolled, 2 voluntarily withdrew, 3 were lost to contact, 2 were withdrawn by the PI

Baseline characteristics

Characteristic
Age, Continuous56 years
STANDARD_DEVIATION 6
Current Military Status
National Guard
1 Participants
Current Military Status
Retired
4 Participants
Current Military Status
Veteran
3 Participants
Gulf War Duty Service
Active
5 Participants
Gulf War Duty Service
National guard
0 Participants
Gulf War Duty Service
Reserve
2 Participants
Military Rank
Enlisted
12 Participants
Military Rank
NCO
0 Participants
Military Rank
Officer
2 Participants
Race/Ethnicity, Customized
Black/African American
0 Participants
Race/Ethnicity, Customized
White/Caucasian
15 Participants
Region of Enrollment
United States
7 participants
Sex: Female, Male
Female
2 Participants
Sex: Female, Male
Male
5 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 70 / 9
other
Total, other adverse events
3 / 70 / 9
serious
Total, serious adverse events
0 / 70 / 9

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 10, 2026