title: The association of CLOCK gene T3111C polymorphism and hPER3 gene 54-nucleotide repeat polymorphism with Chinese Han people schizophrenics.
abstract: Many reports have shown that the biologic rhythm could be altered due to mutations of circadian gene hClock or hPeriod, and the mutations of circadian genes have some relationship with psychosis according to recent studies. A preliminary study has been conducted to examine wether the T3111C single nucleotide polymorphism of the hClock gene or the length polymorphism of the hPer3 gene is associated with the development of schizophrenia. The samples from schizophrenics (n=148, male: 57.4%, female: 42.6%) and normal controls (n=199, male: 59.3%, female: 40.7%) were examined. Allele frequencies of T3111C SNP of hClock were significantly different between schizophrenics and controls (χ2=19.738, P<0.05). Schizophrenics had a significantly higher frequency of the C allele compared with controls (OR=2.613, 95% CI=1.693-4.034). On the other hand, there is no significant difference of allele frequencies of 18 exon of hper3 between schizophrenics and controls (χ2=0.192, P>0.05). Our results suggest that the T3111C (RS1801260) polymorphism of hClock gene is associated with schizophrenia, but it seems that the length polymorphism of 18 exon of hPer3 may not be associated with schizophrenia. It is important to address of the relationship between circadian gene polymorphisms and dopamine functions in further study.
authors.affiliation: Health Ministry Key Laboratory of Chronobiology, School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Ga
authors.initials: G
authors.lastname: Liao
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Sun
authors.forename: Yanyou
authors.initials: Y
authors.lastname: Liu
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhou
authors.initials: Z
authors.lastname: Jiang
authors.forename: Zhengrong
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000328:Adult; D000483:Alleles; D019943:Amino Acid Substitution / Q000235:genetics; D044466:Asian People / Q000235:genetics*; D056926:CLOCK Proteins / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D005006:Ethnicity / Q000235:genetics; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D056950:Period Circadian Proteins / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics*; D012559:Schizophrenia / Q000235:genetics*
chemical_list: C512644:PER3 protein, human; D056950:Period Circadian Proteins; D056926:CLOCK Proteins; C538943:CLOCK protein, human