Related Experiment Videos
Screening for 22q11 deletions in a schizophrenia population
T Arinami1, T Ohtsuki, K Takase
1Department of Medical Genetics, Institute of Basic Medical Sciences, University of Tsukuba, Ibaraki, Tsukuba 305-8575, Japan. tarinami@md.tsukuba.ac.jp
Schizophrenia Research
|November 14, 2001
Summary
The 22q11.2 deletion, linked to velocardiofacial syndrome, is not a common cause of schizophrenia. However, it can occur in individuals with schizophrenia and mild intellectual disability without typical VCFS features.
Area of Science:
- Genetics
- Psychiatry
- Molecular Biology
Background:
- Velocardiofacial syndrome (VCFS) involves chromosome 22q11.2 deletions and is associated with psychotic symptoms.
- The 22q11.2 deletion has been proposed as a potential genetic factor in schizophrenia, found in over 1% of patients.
Purpose of the Study:
- To investigate the prevalence of 22q11.2 deletions in schizophrenia patients.
- To determine if 22q11.2 deletions are a substantial contributor to schizophrenia development.
Main Methods:
- Genotyping microsatellite markers in 300 schizophrenia patients and 300 controls.
- Confirmation of 22q11.2 deletions using fluorescent in situ hybridization (FISH).
Main Results:
- One schizophrenia patient with a 22q11.2 deletion was identified.
- This patient had mild intellectual disability but lacked typical VCFS physical malformations.
- The overall prevalence of 22q11.2 deletion in schizophrenia was not found to be substantial.
Conclusions:
- 22q11.2 deletion is unlikely to be a major cause of schizophrenia in the general population.
- The study confirms the existence of individuals with schizophrenia and 22q11.2 deletion who are physically near-normal, particularly among those with learning disabilities.