A Pharmacogenetic Investigation of Antipsychotics in Schizophrenia and Schizophrenia-Like Psychoses

March 11, 2009 updated by: TheraGenetics Limited

An individual's genetic make-up is known to determine their response to antipsychotic medication. Genetic markers that determine efficacy and side effects of medication may be identified and used to predict treatment outcome.

The study is a naturalistic study of routinely prescribed antipsychotics using outcome measures undertaken as part of the routine clinical care of the cohort. These clinical data are linked with genetic information obtained from DNA and RNA from blood samples undertaken as part of the study.

No alteration is made to the subjects treatment regime or medication.

The study is a two stage investigation:

  • The first stage involves the collection of a databank of clinical information and blood samples for DNA and RNA extraction from patients treated with antipsychotic medication.
  • The second stage is a molecular genetic investigation of treatment-related genetic factors that may contribute to response prediction and predisposition to side effects.

From these genetic studies pharmacogenetic prediction tests will be validated and/or developed.

Study Overview

Status

Terminated

Conditions

Study Type

Observational

Enrollment (Actual)

24

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • British Columbia
      • Vancouver, British Columbia, Canada
        • Vancouver Coastal Health

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

19 years to 65 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients of Vancouver Coastal Health

Description

Inclusion Criteria:

  • Written informed consent must be obtained

  • DSM-IV diagnosis must be one of:

    • schizophrenia
    • schizophreniform
    • schizoaffective
    • delusional disorder
    • brief reactive psychosis
    • psychosis not otherwise specified
  • Ethnic origin of both parents must be known
  • A minimum of 6 weeks continuous treatment completed with the given antipsychotic, prescribed at least at minimum recommended doses
  • Prospectively collected outcome data available (pre-treatment and after at least 6 weeks on treatment)

Exclusion criteria:

  • Significant psychiatric or medical co-morbidity including history of:

    • head injury with loss of consciousness
    • seizures
    • neurological disorder
    • mental retardation (DSM-IV)
    • drug or alcohol dependence (DSM-IV)
    • serious physical illness e.g. malignancy, hepatic/renal insufficiency
  • Concomitant psychotropic medication that may influence ratings
  • Concomitant antipsychotics, antidepressants or mood stabilisers prescribed for >2 weeks during the antipsychotic treatment period rated

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Olanzapine
Subjects treated with olanzapine as part of their routine clinical care
Risperidone
Subjects treated with risperidone as part of their routine clinical care
Quetiapine
Subjects treated with quetiapine as part of their routine clinical care

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

TheraGenetics Limited

Investigators

  • Principal Investigator: Soma Ganesan, MD, Vancouver Coastal Health
  • Study Director: Janet Munro, MB BS, TheraGenetics Limited

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2008

Primary Completion (ACTUAL)

March 1, 2009

Study Completion (ACTUAL)

March 1, 2009

Study Registration Dates

First Submitted

June 17, 2008

First Submitted That Met QC Criteria

June 17, 2008

First Posted (ESTIMATE)

June 19, 2008

Study Record Updates

Last Update Posted (ESTIMATE)

March 12, 2009

Last Update Submitted That Met QC Criteria

March 11, 2009

Last Verified

March 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • TheraGenetics-002

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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