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Home > "G" Clinical Trials Conditions > Genetic Study of Schizophrenia  Genetic Study of Schizophrenia
Genetic Study of Schizophrenia
For Condition: Psychotic Disorder,Schizoaffective Disorder,Schizophrenia
Status: Recruiting
Sponsor(s): National Institute of Mental Health (NIMH) ,
Synopsis: The purpose of this study is to understand the role of genetics in the development of schizophrenia by studying heritable traits in families where at least one member has schizophrenia. Genetics play a significant role in the development of schizophrenia. This genetic study of schizophrenia seeks to identify genetic markers in families where at least one person has the diagnosis of schizophrenia and is willing to participate in the research. Eligible family members can contribute a sample of blood for genetic analysis. The member affected with schizophrenia (and if possible their siblings) can engage in a series of procedures that measure and compare neurobiological traits. In addition to the blood draw, participation can include clinical interviews, and a series of non-invasive neurological and neuropsychological procedures. Parental involvement is welcome but is limited to sharing relevant information through questionnaires and interviews and contributing a blood sample for genetic analysis.
Details: Genetic effects play a prominent role in the pathophysiology of schizophrenia. Prior attempts to link schizophrenia with genetic markers have largely failed for methodological reasons. New advances in molecular biology and quantitative genetics have provided techniques that are dramatically more powerful. We propose to take advantage of these techniques by studying a variety of quantitative traits associated with schizophrenia in patients and their siblings. This contrasts with prior linkage studies which have looked only at the relationship between genes and psychiatric diagnosis. Traits will include measurable, quantifiable neurobiological variables that have been implicated previously as possible phenotypes related to schizophrenia. These include tests of attention and cognition, eye tracking, evoked potentials, measures of schizotypy, and a variety of parameters using brain imaging. We will use a variety of genetic approaches, including, association studies, linkage with affected sib pairs, and quantitative trait loci (QTL) analysis with extreme discordant sib pairs to identify susceptibility loci and genes for biological phenotypes. Data from this study will also be used to assess the neurobiological meaning, or functional impact, of inheriting genes associated with schizophrenia.
Eligibility:
Study Type: Observational, Natural History
Minimum Age/Maximum Age: /
Genders: Both
Protocol Entry Criteria: INCLUSION CRITERIA Patients with schizophrenia and their siblings will be recrruited through families of current or former patients at NIMH, physician referrals, The National Alliance for the Mentally Ill (NAMI), Chestnut Lodge Hospital, St. Elizabeth's Hospital, and other sources both locally and nationally. Subjects will range in age from 18-65 years. The affected sib must have evidence of a diagnosis of schizophrenia, schizo-affective disorder, psychosis N.O.S., or schizophreniform disorder as determined by a preliminary screen of records and treating therapists' reports. EXCLUSION CRITERIA Persons who are mentally retarded, who suffer from organic brain damage, neurological disease, or have a significant history of alcoholism or substance abuse will not be included in the extensive phenotyping arm.
Total Enrollment: 5400
Location and Contact Information:
National Institute of Mental Health (NIMH) *Recruiting*
Bethesda, Maryland, 20892
United States
Recruiting CBDB 3014358970
Additional Information:
Study ID Numbers: 950150; 95-M-0150
Study Start Date: June 30, 1995
Record last reviewed: June 20, 2003
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00001486
Other Psychotic Disorder Studies:
1. Glycine to Treat Psychotic Disorders in Children
2. Comparison of Clozapine or Olanzapine in Childhood-Onset Psychotic Disorders
3. New Drugs in the Treatment of Mood Disorders
4. Genetic Study of Schizophrenia
5. Inpatient Evaluation of Adults with Schizophrenia
Related Studies:
Other Psychotic Disorder Clinical Trials
Other Maryland Clinical Trials
Other Bethesda Clinical Trials
Genetic Study of Schizophrenia
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