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[Study on the relationship between nitric oxide synthase gene G894T polymorphism and hypertension related risk factors in patients with essential hypertension in Chongqing city].

OBJECTIVE
To explore the relationship between genetic anomaly and risk factors in hypertension, a polymorphism at position G894T of the gene encoding the endothelial nitric oxide synthase (eNOS) together with hypertension related risk factors were observed in patients with essential hypertension (EH) in Chongqing city.


METHODS
Two hundred and twenty-six patients with EH and matched controls were selected. Genotypes of polymorphisms were determined by polymerase chain reaction (PCR), while PCR products were digested by restriction endonuclease (BanII). Questionnaire referred to life style, dietary, smoking, alcohol consumption, psychological and mental state, waist-to-hip ratio (WHR), etc was administered.


RESULTS
There was no significant difference noticed in genotype distribution for the eNOS gene G894T genotype between hypertensive groups and controls, but difference was found among certain related risk factors, such as salt intake, snoring and WHR, etc. Logistic regression analysis showed no association between 894T allele and hypertension.


CONCLUSION
Although the polymorphism of eNOS gene G894T did not seem to play an important and direct role in the pathogenesis of EH it might have indirect effects through certain risk factors.