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A Study of RO4917838 (Bitopertin) in Patients With Persistent, Predominant Negative Symptoms of Schizophrenia (WN25309)

This study has been completed.
Information provided by (Responsible Party):
Hoffmann-La Roche Identifier:
First received: August 30, 2010
Last updated: October 3, 2016
Last verified: October 2016
This multi-center, randomized, double blind, parallel-group, placebo-controlled study will evaluate the efficacy and safety of RO4917838 (bitopertin) in patients with persistent, predominant negative symptoms of schizophrenia. Patients, on stable treatment with antipsychotics, will be randomized to receive daily oral doses of RO4917838 or matching placebo for 52 weeks, followed by an optional treatment extension for up to 3 years.

Condition Intervention Phase
Drug: Placebo
Drug: bitopertin [RO4917838]
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
Official Title: A Phase III, Multi-center, Randomized, 24 Week, Double-blind, Parallel-group, Placebo-controlled Study to Evaluate Efficacy and Safety of RO4917838 in Stable Patients With Persistent, Predominant Negative Symptoms of Schizophrenia Treated With Antipsychotics Followed by a 28 Week, Double-blind Treatment Period.

Resource links provided by NLM:

Further study details as provided by Hoffmann-La Roche:

Primary Outcome Measures:
  • Efficacy (PANSS negative symptoms factor score) [ Time Frame: Week 24 ] [ Designated as safety issue: No ]
  • Safety (incidence of adverse events) [ Time Frame: Week 24 ] [ Designated as safety issue: No ]

Enrollment: 624
Study Start Date: December 2010
Study Completion Date: July 2014
Primary Completion Date: July 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 Drug: bitopertin [RO4917838]
Oral dose level 1, once a day for 52 weeks
Experimental: 2 Drug: bitopertin [RO4917838]
Oral dose level 2, once a day for 52 weeks
Placebo Comparator: 3 Drug: Placebo
Oral doses, once a day for 52 weeks


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult patients, aged 18 years and above
  • Diagnosis of schizophrenia of paranoid, disorganized, residual, undifferentiated or catatonic subtype
  • Predominant negative symptoms
  • With the exception of clozapine, patients are on any of the available marketed atypical or typical antipsychotics (treatment with a maximum of two antipsychotics)

Exclusion Criteria:

  • Evidence that patient has clinically significant, uncontrolled and unstable disorder (e.g. cardiovascular, renal, hepatic disorder)
  • Body Mass Index (BMI) of <17 or >40 kg/m2
  • Depressive symptoms, defined as a score of 9 or greater on the Calgary Depression Rating Scale for Schizophrenia (CDSS)
  • A severity score of 3 or greater on the Parkinsonism item of the ESRS-A (Clinical Global Impression, Parkinsonism)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01192906

  Show 113 Study Locations
Sponsors and Collaborators
Hoffmann-La Roche
Study Director: Clinical Trials Hoffmann-La Roche
  More Information

Responsible Party: Hoffmann-La Roche Identifier: NCT01192906     History of Changes
Other Study ID Numbers: WN25309  2010-020467-21 
Study First Received: August 30, 2010
Last Updated: October 3, 2016
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders processed this record on October 21, 2016