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Association study of the 5-HT6 receptor gene in schizophrenia.

Serotonergic (5-hydroxytryptamine; 5-HT) transmission may play an important role in the treatment and/or pathogenesis of schizophrenia. Previous studies reported that several atypical antipsychotic agents have high affinities for the 5-HT6 receptor. The 5-HT6 receptor gene polymorphism might contribute to the genetic background of this disorder. One hundred and fifty unrelated patients with schizophrenia and 150 unrelated healthy controls were genotyped for a biallelic polymorphism (267C/T) at the 5-HT6 receptor gene. No significant positive association between the 5-HT6 receptor genotype and schizophrenia was observed. Our results suggests that the 267C/T polymorphism of the 5-HT6 receptor gene may not be involved in the susceptibility to schizophrenia.