三个候选基因多态性与高血压病关联的研究

目的 探讨转化生长因子β1（TGF-β1）T869C、醛固酮合成酶（CYP1182）-344T／C和Oα-内收蛋白Gly460Trp3个单核苷酸多态性（SNPs）与原发性高血压（EH）的关系。方法采用限制性片段长度多态性和突变基因分离PCR法,在396例EH患者和214例正常人中分析T869C、-344T／C和Gly460Trp多态性的基因型分布。结果在单基因研究中,女性EH患者与对照组比较,TGF-β1T869C基因型和等位基因频率差异有统计学意义（P值分别=0．017,0．014）;与T等位基因携带者相比,CC纯合子EH患病率差异有统计学意义（OR=2．97,95％CI 1．38～6．32,P=0．004）;而男性则两组间T869C基因型分布和等位基因频率差异无统计学意义（P〉0．05）。采用多基因联合分析,TGF-β1 CC纯合子中,CYP1182Tr纯合子EH患病率高于C等位基因携带者（OR=1．99,95％CI 1．01～3．74,P=0．03）。结论TGF-β1 T869C多态性可能与中国汉族女性EH相关;在EH人群中,TGF-β1 T869C和CYP1182-344T／C多态性可能有协同作用。

Single nucleotide polymorphisms of three candidate genes in essential hypertension

OBJECTIVE: To explore the association of single nucleotide polymorphisms (SNPs) of three candidate genes, including T869C of transforming growth factor beta1 (TGF-beta1), -344T/C of aldosterone synthase (CYP11B2) and Gly460Trp of alpha-Adducin with essential hypertension in Chinese Han population. METHODS: Three hundred ninety six hypertensive patients and 214 normotensive subjects were genotyped for T869C, -344T/C and Gly460Trp polymorphisms with polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and mutagenically separated PCR (MS-PCR), respectively. RESULTS: In single-gene analysis, no association was observed between either CYP11B2 -344T/C or alpha-Adducin Gly460Trp polymorphism and essential hypertension. For female, there were significant difference in genotype distribution and allele frequency of T869C polymorphism (P < 0.02), as compared with subjects with T allele. CC homozygosity had a higher relative risk of hypertension (OR = 2.97, 95% CI, 1.38 to 6.32, P = 0.004), whereas we failed to detect any association between T869C polymorphism and essential hypertension in male. In multiple-gene analysis, the incidence of hypertension was higher in CYP11B2 TT homozygosity than in other CYP11B2 genotypes (OR = 1.99, 95% CI, 1.01 to 3.74, P = 0.03) in the presence of TGF-beta1 CC genotype. CONCLUSIONS: Our results indicated that T869C polymorphism of TGF-beta1 gene might be associated with essential hypertension in female, furthermore, the TGF-beta1 T869C and CYP11B2-344T/C polymorphisms appeared to interact in hypertensive population.