Genetic Study of Schizophrenia
|First Received Date ICMJE||November 3, 1999|
|Last Updated Date||August 16, 2014|
|Start Date ICMJE||June 1995|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00001486 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Genetic Study of Schizophrenia|
|Official Title ICMJE||A Neurobiological Investigation of Patients With Schizophrenia Spectrum Disorders and Their Siblings|
This large ongoing study at NIMH investigates the neurobiology of schizophrenia by identifying susceptibility genes, evaluating their impact on brain function to better understand how to treat and prevent this illness.
Objective: Schizophrenia is a complex genetic disorder which likely involves many genes each producing a slight increase in risk. Finding weak-acting genes in complex genetic disorders has been challenging and will likely require a number of approaches and large clinical samples. Several strategies have emerged recently that appear to markedly improve the power of genetic studies for detecting such genes. These include using association (rather than linkage) and using intermediate phenotypes in addition to DMS-IV diagnosis.
Study Population: We propose to take advantage of these techniques by studying quantitative traits related to schizophrenia in patients, siblings, and controls.
Design: We will employ an association design, rather than linkage. Traits will include quantifiable neurobiological variables that have been implicated previously as possible phenotypes related to schizophrenia. These include tests of attention and cognition, and a variety of parameters using brain imaging and magnetoencephalography.
Outcome Measure: We will use several statistical methods to show that specific genetic polymorphisms affect these phenotypes, including case control and family based association studies.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||6150|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Inclusion criteria for Siblings (probands and unaffected siblings):
Exclusion Criteria for Siblings (probands and unaffected siblings):
Siblings who do not qualify for the 2-day or 1-day study, may participate in the limited phenotyping arm in which only a psychiatric interview and a blood draw for genetic analysis (SCID-DNA) will be performed, case control analysis or be included as part of a trio (one parent, one sibling, one patient) to study genetic transmission from parents to offsprings.. All parents are eligible for the study.
Healthy Controls Inclusion Criteria:
To be eligible for this research study, healthy volunteers must be:
Healthy Controls Exclusion Criteria:
They will not be eligible if:
|Ages||18 Years and older|
|Accepts Healthy Volunteers||Yes|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00001486|
|Other Study ID Numbers ICMJE||950150, 95-M-0150|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Mental Health (NIMH)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||August 2014|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP