D-cycloserine Augmentation of Cognitive Remediation in Schizophrenia

2014-08-27 03:19:51 | BioPortfolio


This study seeks to examine the effects of D-cycloserine augmentation on cognitive remediation for patients diagnosed with schizophrenia. We will test the hypotheses that D-cycloserine will significantly improve cognitive performance, negative symptoms, and measures of functioning compared to placebo when combined with eight weeks of cognitive remediation. We expect that these effects will persist when assessed at six-month follow up.


We propose to conduct an 8-week, placebo-controlled, double-blind, parallel-group trial of D-cycloserine augmentation of cognitive remediation in 80 stable schizophrenia outpatients. The primary outcome measure is change in performance on the MATRICS cognitive battery composite score after 8 weeks. Secondary outcome measures include a measure of processing speed assessed after weeks 1, 2, 4 & 8, and changes in negative symptoms and measures of functioning after 4 and 8 weeks. In addition, all outcome measures will be repeated at 6 months to assess persistence of benefit.


1. D-cycloserine will significantly improve cognitive performance as measured by the composite score on the MATRICS battery compared to placebo after 8 weeks of cognitive remediation.

2. D-cycloserine will significantly improve negative symptoms as measured by the SANS compared to placebo after 8 weeks when combined with cognitive remediation.

3. D-cycloserine will significantly improve measures of functioning (GAS, QoL and CGI) at 8 weeks compared to placebo when combined with cognitive remediation.

4. D-cycloserine effects on cognition, negative symptoms and functioning will persist compared to placebo when assessed at 6-month follow-up.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment




D-cycloserine, Placebo, Cognitive Remediation


Massachusetts General Hospital
United States




National Institute of Mental Health (NIMH)

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:19:51-0400

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