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CompletedNCT01235585Updated Nov 2, 2016

A Study of RO4917838 (Bitopertin) in Patients With Sub-optimally Controlled Symptoms of Schizophrenia (WN25306)

A Phase 3 interventional study of Placebo and bitopertin [RO4917838] in Schizophrenia, sponsored by Hoffmann-La Roche. Completed at 120 sites in 14 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-11-02.

Sponsored by Hoffmann-La Roche · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
597
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

This randomized, multi-center, double-blind, parallel-group, placebo-controlled study will evaluate the efficacy and safety of RO4917838 (bitopertin) in patients with sub-optimally controlled 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.

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Conditions studied

  • Schizophrenia

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In context

Schizophrenia

3,539 studies on the registry are indexed under Schizophrenia; 473 are open to participants now.

This study's enrollment of 597 is above the median of 70 across 2,924 interventional studies indexed under Schizophrenia.

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Lead sponsor

Hoffmann-La Roche is the lead sponsor of 2,099 studies on the registry; 88 are open to participants now.

Of its 324 completed or terminated interventional studies of FDA-regulated products, 245 (76%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Adult patients, >/= 18 years of age
  • Diagnosis of schizophrenia
  • Clinical stability for 16 weeks (4 months) prior to randomization
  • Antipsychotic treatment stability for the past 12 weeks prior to randomization
  • With the exception of clozapine, patients are on any of the available marketed atypical or typical antipsychotic (treatment with a maximum of two antipsychotics)

Exclusion criteria

Exclusion Criteria:

  • Has treatment resistant schizophrenia as judged by the treating physician OR have failed two trials
  • Evidence that patient has clinically significant uncontrolled or unstable medical disorder (e.g. cardiovascular, renal hepatic, gastrointestinal, hematologic, immunological, neurological, endocrine, metabolic or pulmonary disease)
  • Patient has a body mass index (BMI) of \<17 or >40 kg/m2, respectively)
  • Diagnosis of mental retardation or severe organic brain syndromes
  • In the investigator's judgment, a significant risk of suicide or violent behavior
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
597 participants (actual)

Study arms

  • Experimental
    Bitopertin oral dose level 1

    Drug: bitopertin [RO4917838]

  • Experimental
    Bitopertin oral dose level 2

    Drug: bitopertin [RO4917838]

  • Placebo comparator
    Placebo

    Drug: Placebo

Interventions

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What researchers measure

Primary outcomes

  1. Positive symptoms factor score assessed by Positive and Negative Syndrome Scale (PANSS)

    Time frame: Change from baseline to Week 12

  2. Safety (incidence of adverse events)

    Time frame: Week 12

Secondary outcomes

  1. Symptom domains of schizophrenia using Positive and Negative Syndrome Scale (PANSS)

    Time frame: Change from baseline to Week 12

  2. Disease improvement on Clinical Global Impression - Improvement (CGI-I) symptoms scale

    Time frame: Change from baseline to Week 12

  3. Disease severity on Clinical Global Impression - Severity (CGI-S) symptoms scale

    Time frame: Change from baseline to Week 12

  4. Safety (incidence of adverse events)

    Time frame: 60 weeks

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Study locations

120 sites
  • Carson, California 90746, United States
  • Garden Grove, California 92845, United States
  • Long Beach, California 90813, United States
  • Long Beach, California 90822, United States
  • Oceanside, California 92056, United States
  • San Diego, California 92121, United States
  • San Diego, California 92123, United States
  • Hartford, Connecticut 06106, United States
  • Norwalk, Connecticut 06851, United States
  • North Miami, Florida 33161, United States
  • Atlanta, Georgia 30328, United States
  • Chicago, Illinois 60612, United States
  • Hoffman Estates, Illinois 60169, United States
  • Joliet, Illinois 60435, United States
  • Lake Charles, Louisiana 70601, United States
  • St Louis, Missouri 63128, United States
  • St Louis, Missouri 63141, United States
  • Omahac, Nebraska 68131, United States
  • Cedarhurst, New York 11516, United States
  • Jamaica, New York 11418, United States
  • Rochester, New York 14623, United States
  • Allentown, Pennsylvania 18104, United States
  • Norristown, Pennsylvania 19403, United States
  • Philadelphia, Pennsylvania 19139, United States
  • Bothell, Washington 98011, United States
  • Salvador, Estado de Bahia 40301-500, Brazil
  • Goiânia, Goiás 74093-040, Brazil
  • Belo Horizonte, Minas Gerais 30150-270, Brazil
  • Curitiba, Paraná 80240-280, Brazil
  • Rio de Janeiro, Rio de Janeiro 22270-060, Brazil
  • Pelotas, Rio Grande do Sul 96030-002, Brazil
  • Porto Alegre, Rio Grande do Sul 90035-003, Brazil
  • Itapira, São Paulo 13970-905, Brazil
  • São Paulo, São Paulo 04044-000, Brazil
  • São Paulo, São Paulo 05403-010, Brazil
  • Calgary, Alberta T2N 4Z6, Canada
  • Medicine Hat, Alberta T1B 4E7, Canada
  • Vancouver, British Columbia V5Z 3P1, Canada
  • Halifax, Nova Scotia B3H 2E2, Canada
  • Burlington, Ontario L7R 4E2, Canada
  • Hamilton, Ontario L8N 3K7, Canada
  • Mississauga, Ontario L5M 4N4, Canada
  • Montreal, Quebec H1N 3M5, Canada
  • Montreal, Quebec H3A 1A1, Canada
  • Santiago, 7500710, Chile
  • Santiago, 7501126, Chile
  • Santiago, 8050000, Chile
  • Santiago, 8320000, Chile
  • Santiago, 8900000, Chile
  • Santiago, Chile
  • Valdivia, 5090000, Chile
  • Berlin, 10117, Germany
  • Bochum, 44805, Germany
  • Cologne, 50937, Germany
  • Freiburg im Breisgau, 79104, Germany
  • Hamburg, 20246, Germany
  • München, 80336, Germany
  • München, 81675, Germany
  • Nuremberg, 90402, Germany
  • Daugovpils, LV-5417, Latvia
  • Jelgava, LV-3008, Latvia
  • Liepāja, LV 3401, Latvia
  • Kaunas, 44279, Lithuania
  • Kaunas, 48259, Lithuania
  • Kaunas, 50009, Lithuania
  • Kaunas, 53136, Lithuania
  • Šilutė, 99142, Lithuania
  • Vilnius, 07156, Lithuania
  • Vilnius, 10204, Lithuania
  • Assen, 9400 RA, Netherlands
  • Groningen, 9700 AB, Netherlands
  • Groningen, 9713 GZ, Netherlands
  • Choroszcz, 16-070, Poland
  • Kielce, 25-103, Poland
  • Lublin, 20-045, Poland
  • Lublin, 20-080, Poland
  • Lublin, 20-582, Poland
  • Piekary Śląskie, 41-940, Poland
  • Skorzewo, 60-185, Poland
  • Tuszyn, 95-080, Poland
  • Warsaw, 02-957, Poland
  • Bojnice, 972 01, Slovakia
  • Bratislava, 820 07, Slovakia
  • Bratislava, 851 01, Slovakia
  • Rimavská Sobota, 97912, Slovakia
  • Svidník, 089 01, Slovakia
  • Trnava, 917 75, Slovakia
  • Barcelona, Barcelona 08036, Spain
  • Barcelona, Barcelona 08304, Spain
  • Barcelona, Barcelona 08830, Spain
  • Madrid, Madrid 28009, Spain
  • Madrid, Madrid 28040, Spain
  • Oviedo, Principality of Asturias 33011, Spain
  • Salamanca, Salamanca 37007, Spain
  • Zamora, Zamora 49021, Spain
  • Hualian Town, 970, Taiwan
  • Kaohsiung City, 80276, Taiwan
  • Taichung, 407, Taiwan
  • Tainan, 704, Taiwan
  • Tainan County, 717, Taiwan

Showing the first 100 of 120 sites across 14 countries.

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References and documents

Publications

  • Bugarski-Kirola D, Iwata N, Sameljak S, Reid C, Blaettler T, Millar L, Marques TR, Garibaldi G, Kapur S. Efficacy and safety of adjunctive bitopertin versus placebo in patients with suboptimally controlled symptoms of schizophrenia treated with antipsychotics: results from three phase 3, randomised, double-blind, parallel-group, placebo-controlled, multicentre studies in the SearchLyte clinical trial programme. Lancet Psychiatry. 2016 Dec;3(12):1115-1128. doi: 10.1016/S2215-0366(16)30344-3. Epub 2016 Nov 2. PubMed 27816567 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 2, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01235585
Lead sponsor
Hoffmann-La Roche
Responsible party
Sponsor
First posted
Nov 5, 2010
Start date
Dec 2010
Primary completion
Sep 2014
Completion
Sep 2014
Last update
Nov 2, 2016

Study contacts

Clinical Trials
study director · Hoffmann-La Roche
View the source record on ClinicalTrials.gov ↗

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