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Association of a 5-HT5A receptor polymorphism, Pro15Ser, to schizophrenia

Abstract

Several different lines of evidence suggest that genes involved in serotonergic neurotransmission are factors in the pathogenesis of schizophrenia. For example, 5-HT5A knockout mice revealed decreased locomotor response to lysergic diethylamide (LSD), which produces a psychotic-like state in healthy people. Recently, we reported a naturally occurring conservative Pro15Ser substitution in the 5-HT5A receptor. Here, we evaluate whether this substitution is associated with schizophrenia in a sample including 249 unrelated Japanese schizophrenia patients and 253 unrelated controls. Patients and controls were genotyped for the Pro15Ser polymorphism by a PCR-RFLP assay. Ser15 allele frequencies were 0.07 in patients with schizophrenia and 0.02 in controls (χ2 = 17.42, df =1, P < 0.0001). thus, we detected a highly significant association of pro15ser to schizophrenia in a large population of japanese schizophrenia patients and controls. since case-control studies have an inherent potential for false-positive results due to population stratification, this finding is preliminary pending further studies, including studies using the transmission/disequilibrium test to eliminate stratification bias or control loci to assess ethnic matching of cases and controls.

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Acknowledgements

This research was funded in part by Research Grant 10670923, and by a Grant-in-Aid for Scientific Research on Priority Areas (C) ‘Medical Genome Science’ from the Ministry of Education, Science, Sports and Culture of Japan and the Research Grant (9B-5) for Nervous and Mental Disorders from the Ministry of Health and Welfare of Japan (Drs Iwata and Ozaki). The authors thank Yukiko Yamamoto for her assistance.

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Correspondence to D Goldman.

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Iwata, N., Ozaki, N., Inada, T. et al. Association of a 5-HT5A receptor polymorphism, Pro15Ser, to schizophrenia. Mol Psychiatry 6, 217–219 (2001). https://doi.org/10.1038/sj.mp.4000829

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