[Association study of the polymorphisms of monoamine oxidase A genes with schizophrenia].
OBJECTIVE
To investigate the relationship between monoamine oxidase A (MAOA) gene polymorphisms and schizophrenia in a Chinese Han population.


METHODS
Two hundred and twelve schizophrenic patients and 168 healthy controls were recruited according to CCMD-3. The polymorphisms of MAOA gene were determined with the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. The case-control association analysis was adopted to analyze the frequencies of genotype and allele in schizophrenic patients and controls.


RESULTS
(1) The genotypes of MAOA gene were consistent with Hardy-Weinberg equilibrium in patient group and control group (chi2 = 0.618, df= 2, P> 0.05; chi2 = 3.173, df= 2, P> 0.05). (2) The distributions of genotypes or alleles of MAOA genes had no significant difference between patient group and control group (P> 0.05). (3)Divided by sex, the frequency of CT genotype in male patients was higher than that in male controls (chi2 = 7.654, P= 0.022). (4) There were no significant differences of genotypic and allelic distribution in MAOA genes between schizophrenic patients with positive family history and schizophrenic patients with negative family history and among different clinical subtypes in schizophrenic patients (P> 0.05).


CONCLUSIONS
No association between MAOA gene and schizophrenia is found in Chinese Han population, but CT genotype is likely to be a susceptible factor of male schizophrenia.
Department of Psychiatry, the Second Affiliated Hospital, Xinxiang Medical College, Xinxiang, Henan, 453002 P. R. China.
Yu-zhong
YZ
Shi
Cong-hui
CH
Wang
Lu-xian
LX
Lv
Yu-hong
YH
Wang
Hong-xing
HX
Zhang
Bai-yu
BY
Lou
D000293:Adolescent; D000328:Adult; D000483:Alleles; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D008995:Monoamine Oxidase / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D012559:Schizophrenia / Q000235:genetics*; D055815:Young Adult
D008995:Monoamine Oxidase