D-serine for the Schizophrenia Prodrome
|ClinicalTrials.gov Identifier: NCT00826202|
Recruitment Status : Completed
First Posted : January 22, 2009
Results First Posted : February 8, 2017
Last Update Posted : August 14, 2017
The purpose of the study is to determine the safety and efficacy of D-serine as an early intervention treatment for the schizophrenia prodrome condition. This study is a placebo-controlled trial of D-serine in the symptomatic treatment of patients with the schizophrenia prodrome. Seventy two subjects meeting criteria for the schizophrenia prodrome will be included in this study, 24 at each site (Yale, Nathan Kline Institute and Zucker Hillside Hospital). The primary outcome measures will include symptom and neuropsychological measures. The duration of this study is two and a half years.
This research with D-serine holds out the prospect of direct benefit for the patient's current symptoms. Subjects may also benefit from the close monitoring of their symptoms, so that, if schizophrenic psychosis does occur, the psychosis will be recognized and treatment may begin with minimal delay. This study also could be of benefit by suggesting a promising lead in early intervention in the schizophrenic prodrome.
Overall Design Summary. We propose for prodromal patients to be randomized to D-serine vs placebo for 16 weeks. To insure that all subjects have the opportunity to receive D-serine, there will be an optional 16 week cross-over trial on the alternate study medication. No subject will be on D-serine for longer than 16 weeks. Admission criteria, Assessment Procedures, and Study Design will be the same across all sites. The procedures and timeline are shown in Table 1. The procedures and timeline are the same for the initial randomized 16 week trial and the optional cross-over trial on the alternate study medication. If patient's opt for the 16 week treatment on the alternate medication, we will use their assessments from end of initial treatment as baseline for 16 week treatment on alternate medication. Subjects will be seen for two preliminary visits, then once in treatment, subjects will be seen weekly for the first 5 visits then biweekly thereafter. A safety blood and urine collection will be done on day 3 (3 days after the start of study medication). Vital signs and weight, blood draw and urine collection for safety measures, urine pregnancy test and urine for toxicology will be repeated throughout treatment. Adverse effects ratings and symptom assessments will be repeated at each visit. Neuropsychological assessment and optional "Biomarker study" visual, auditory and ERPs tasks will be administered during one of the two preliminary visits then again at study endpoint. Any patients who convert to frank psychosis will be referred/offered immediate treatment.
|Condition or disease||Intervention/treatment||Phase|
|Schizophrenia Prodrome||Drug: D-serine Other: Placebo||Phase 2|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||44 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||D-Serine vs Placebo for the Schizophrenia Prodrome|
|Study Start Date :||March 2009|
|Actual Primary Completion Date :||November 2012|
|Actual Study Completion Date :||November 2012|
Experimental: D serine
|Placebo Comparator: Placebo||
- Scale of Prodromal Symptoms (SOPS) Negative Scale [ Time Frame: 16 weeks ]The SOPS Negative symptom scale consists of six Negative Symptom items. Each item has a severity scale rating from 0 (Never, Absent) to 6 (Severe/Extreme). The severity of the prodromal state is judged according to the sum of the ratings from each of the SOPS items and ranges from 0 to 36.
- Scale of Prodromal Symptoms (SOPS) Total [ Time Frame: 16 weeks ]The SOPS Total consists of five Positive Symptom items, six Negative Symptom items, four Disorganization Symptom items, and four General Symptom items. Each item has a severity scale rating from 0 (Never, Absent) to 6 (Severe/Extreme—and Psychotic, for the positive items). The severity of the prodromal state is judged according to the sum of the ratings from each of the SOPS items and ranges from 0 to 114.
- IL6 Levels [ Time Frame: 16 weeks ]Final IL6 levels (pg/ml) in available subjects
- Pittsburgh Sleep Quality Index Score [ Time Frame: 16 weeks ]The Pittsburgh Sleep Quality Index (PSQI) consists of 19 self-rated questions and five questions rated by the bed partner or roommate. The latter five questions are used for clinical information only, are not tabulated in the scoring of the PSQI. The 19 self-rated questions assess a wide variety of factors relating to sleep quality, including estimates of sleep duration and latency and of the frequency and severity of specific sleep-related problems. These I9 items are grouped into seven component scores, each weighted equally on a 0-3 scale. The seven component scores are then summed to yield a global PSQI score, which has a range of 0-21; higher scores
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00826202
|United States, Connecticut|
|New Haven, Connecticut, United States|
|United States, New York|
|Zucker Hillside Hospital|
|Glen Oaks, New York, United States|
|New York State Psychiatric Institute|
|New York, New York, United States, 10032|
|Nathan Kline Institute|
|Orangeburg, New York, United States, 10962|
|Principal Investigator:||Daniel C Javitt, MD, PhD||Nathan Kline Institute for Psychiatric Research|