ABSTRACT. The association of single nucleotide polymorphisms (SNPs) in PPARγ with hypertension is controversial. The aim of the present study was to clarify the contributions of PPARγ genetic variants to hypertension through an association study. A total of 414 unrelated Mongolian herdsmen and 524 Han farmers were included in this study. Fourteen intronic SNPs were analyzed and genotyped using a polymerase chain reaction/ligase detection reaction assay. Prior to correction for multiple testing, the SNPs rs6802898 and rs12633551 were significantly associated with the prevalence of hypertension in the Han and Mongolian populations, respectively. The genetic association of each SNP with hypertension was individually tested using logistic regression. The SNP rs6802898 was associated with hypertension in both dominant (P = 0.033) and additive models (P = 0.026) in the Han population, whereas the SNP rs12633551 was associated with hypertension in both dominant (P = 0.014) and additive models (P = 0.0073) in the Mongolian population. Moreover, SNP rs12633551 had a significant effect on systolic and diastolic blood pressure response. However, none of these associations were statistically significant after Bonferroni correction for multiple testing, although there was a significant difference among the haplotypes in the Han and Mongolian populations. Interestingly, there was an association of the PPARγ haplotypes with hypertension even after 19295-19308 (2015) Bonferroni correction. Thus, determination of the PPARγ haplotypes in different populations may prove informative for assessment of the genetic risk for hypertension.
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