Evaluating Genetic Risk Factors for Childhood-Onset Schizophrenia

This study is currently recruiting participants. (see Contacts and Locations)
Verified June 2014 by National Institutes of Health Clinical Center (CC)
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00001198
First received: November 3, 1999
Last updated: June 26, 2014
Last verified: June 2014
  Purpose

A study of children and adolescents (current N=100) with very early onset by age 12 (COS) of DSM-III-R defined schizophrenia with (97-M-0126) is examining the clinical, neurobiological, early neurodevelopmental, genetic, and clinical drug response characteristics of these cases. Earlier studies have documented the continuity between COS and adult onset cases (See Jacobsen and Rapoport, 1998 for review). The focus has now shifted to increasing the sample size and evaluation of familial risk factors including: psychiatric diagnoses of family members; smooth pursuit eye movements; neuropsychological tests deficits, and obtaining blood for cell lines for genetic studies (family members only, this is also covered under 96-M-0060, Dr. Ellen Sidransky).

A study of obstetrical records of COS probands indicated no increase in adverse pre or perinatal events for these cases compared with obstetrical records of their siblings (Nicolson et al submitted). In contrast, several findings point to increased risk for these probands. To date, a total of 5 (10.4%) COS subjects were found to have previously unknown cytogenetic abnormalities (Microdeletion of 22q11 (3 cases), (Usiskin et al, submitted), Mosaic 45X0 (one case) (Kumra et al, 1998) and balanced 1:7 translocation (Gordon et al 1994).

The study of first degree relatives of these very rare cases addresses the hypothesis that risk factors, most probably genetic, are increased in immediate family members relative both to community controls and to the relatives of patients with chronic, treatment resistant, adult-onset schizophrenia (AOS). A second hypothesis is that COS familial risk factors show significant relationship to the developmental delays/abnormalities being observed in the COS probands. As a total of 50 additional COS subjects will be studied over the next 5 years, the pediatric control sample for the probands will also be increased, determined by the need to have concurrent measures for patients and controls to maintain measurement validity. Thus a total of 600 additional subjects are to be studied including 50 controls for COS probands, 150 COS relatives, 150 controls for COS relatives, and 250 relatives of adult onset schizophrenics (AOS).


Condition
Psychosis
Schizophrenia
Genetic Structure
Childhood Onset Psychotic Disorders
Schizoaffective Disorder

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Biochemical, Physiological, and Psychological Measures in Normal Controls and Relatives of Psychiatric Patients

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 1975
Study Start Date: March 1984
Detailed Description:

A study of children and adolescents (current N = 117 with very early onset by age 12 (COS) of DSM-III-R defined schizophrenia is examining the clinical, neurobiological, early neurodevelopmental, genetic, and clinical drug response characteristics of these cases, under Protocols 97-M-0126 and 03-M-0035. Earlier studies have documented the continuity between COS and adult-onset case (1,2). The focus has now shifted to increasing the sample size and evaluation of familial risk factors including: psychiatric diagnoses of family members; neuropsychological test deficits, and obtaining blood and fibroblasts for cell lines for genetic studies.

A study of obstetrical records of COS probands indicated no increase in adverse pre or perinatal events for these cases compared with obstetrical records of their well siblings. In contrast, several findings point to increased genetic risk for these probands.

The study of first-degree relatives of these very rare cases addresses the hypothesis that risk factors, most probably genetic, are increased in immediate family members relative both to community controls and to the relatives of patients with chronic, treatment resistant, adult-onset schizophrenia (AOS). A second hypothesis is that COS familial risk factors show significant relationship to the developmental delays/abnormalities being observed in the COS probands.

  Eligibility

Ages Eligible for Study:   6 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria
  • INCLUSION CRITERIA:

Inclusion criteria for healthy controls will continue to be:

  1. Ages 6 and above
  2. Evidence of normal developmental history and normal functioning.

Inclusion criteria for relatives of probands will be:

  1. Ages 6 and above
  2. Evidence of blood relationship to proband with a disorder under study, with usual selection of first-degree relatives, and occasional participation of more distantly-related relatives (grandparents, aunts/uncles and cousins).

EXCLUSION CRITERIA:

Exclusion criteria for community controls are:

  1. Evidence of medical or neurological disease.
  2. Diagnosis of schizophrenia or schizoaffective disorder in the control or in first degree relatives by history, clinical interview, or by structured, diagnostic psychiatric interview (Diagnostic Interview for Children and Adolescents IV).

Exclusion criteria for relatives of probands:

  1. Absence of consent on the part of the proband or parent(s) of proband to contact relatives
  2. Absence of signed consent or assent by relative(s) to participate
  3. Lack of consent capacity
  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 ClinicalTrials.gov identifier: NCT00001198

Contacts
Contact: Judith L Rapoport, M.D. (301) 435-4501 rapoporj@mail.nih.gov

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
Investigators
Principal Investigator: Judith L Rapoport, M.D. National Institute of Mental Health (NIMH)
  More Information

Additional Information:
Publications:
ClinicalTrials.gov Identifier: NCT00001198     History of Changes
Other Study ID Numbers: 840050, 84-M-0050
Study First Received: November 3, 1999
Last Updated: June 26, 2014
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Schizophrenia
Observational

Additional relevant MeSH terms:
Schizophrenia
Psychotic Disorders
Mental Disorders
Disease
Schizophrenia, Childhood
Schizophrenia and Disorders with Psychotic Features
Pathologic Processes
Mental Disorders Diagnosed in Childhood

ClinicalTrials.gov processed this record on October 19, 2014