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Association between polymorphisms in the type 1 sigma receptor gene and schizophrenia
H Ishiguro1, T Ohtsuki, M Toru
1Department of Medical Genetics, Institute of Basic Medical Science, University of Tsukuba, Ibaraki, Japan.
Neuroscience Letters
|December 19, 1998
Summary
Researchers identified specific genetic variations in the type 1 sigma receptor gene linked to schizophrenia. The TT/Pro2 haplotype showed a significant association with the disorder, suggesting a potential genetic factor in schizophrenia etiology.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Antipsychotic medications often target sigma receptors.
- Sigma receptors are implicated in the pathophysiology of schizophrenia.
- Genetic factors are believed to contribute to schizophrenia development.
Purpose of the Study:
- To investigate nucleotide variants within the type 1 sigma receptor gene.
- To determine if specific genetic polymorphisms are associated with schizophrenia.
Main Methods:
- Systematic screening for gene variants in schizophrenic patients.
- Genotyping of two polymorphisms: GC-241-240TT and Gln2Pro.
- Association analysis in an expanded cohort of schizophrenics and controls.
Main Results:
- Identified two polymorphisms: GC-241-240TT and Gln2Pro, in linkage disequilibrium.
- The Pro2 variant alters the endoplasmic reticulum retention signal.
- A significant association was found between the TT/Pro2 haplotype and schizophrenia (OR=1.27, P=0.04).
Conclusions:
- The TT/Pro2 haplotype of the type 1 sigma receptor gene is associated with an increased risk of schizophrenia.
- These findings support a role for sigma receptor gene variants in schizophrenia etiology.
- Further research into sigma receptor genetics may offer new insights into schizophrenia treatment.