Relationship between inducible NOS single-nucleotide polymorphisms and hypertension in Han Chinese

Area of Science:

• Genetics
• Cardiovascular Disease
• Molecular Biology

Background:

• Inducible nitric oxide synthase (iNOS) single-nucleotide polymorphisms (SNPs) have been investigated for their role in hypertension susceptibility.
• Previous studies have yielded inconsistent findings regarding the association between iNOS SNPs and hypertension.

Purpose of the Study:

• To investigate the association between iNOS gene polymorphisms and hypertension in a Chinese population.
• To clarify the role of iNOS in the pathogenesis of hypertension.

Main Methods:

• A case-control study was conducted with 1172 hypertensive patients and 1172 healthy controls.
• Genotype and allele frequencies of iNOS SNPs (rs2779249 and rs2297518) were analyzed.
• Logistic regression models (additive, dominant, recessive) were used, adjusting for covariates like age, sex, BMI, and lipid profiles.

Main Results:

• Significant differences in genotype and allele frequencies of rs2779249 and rs2297518 were observed between hypertensive and normotensive subjects.
• Odds ratios (ORs) indicated increased hypertension risk associated with specific genotypes of rs2779249 (e.g., recessive OR=1.68) and rs2297518 (e.g., dominant OR=1.46).
• Adjusted analyses controlling for confounding factors reinforced the association between these iNOS SNPs and hypertension.

Conclusions:

• The study provides strong evidence for a significant association between inducible nitric oxide synthase (iNOS) gene polymorphisms and hypertension.
• These findings suggest that iNOS plays a role in the genetic susceptibility to hypertension in the studied Chinese population.