新疆哈萨克族人神经前体细胞表达发育调控蛋白4基因遗传变异的分布及其与高血压的相关性

目的 探讨神经前体细胞表达发育调控蛋白4( NEDD4)基因功能区的多态位点与新疆哈萨克族人高血压病的相关性.方法 采取以流行病学调查为基础的病例对照研究,选择938例哈萨克族自然人群(包括451例高血压患者和487例对照)作为研究对象.首先测序筛查哈萨克族高血压病患者 NEDD4基因功能区的变异位点,选择代表性变异位点应用TaqMan-PCR在自然人群中进行基因型鉴定及病例对照关联研究.结果 在 NEDD4基因的功能区共发现13个新的和15个已知的变异位点,其中包括7个错义突变. NEDD4基因的9个代表性变异位点中,4个低频率的错义突变不是哈萨克族人高血压病特有的变异,5个常见单核苷酸多肽及其组成的各单倍型在高血压病例与对照组间的频率分布差异无显著性(P＞0.05).结论 NEDD4基因遗传变异与哈萨克族人高血压病无相关性.

Distribution of Genetic Variation of Neural Precursor Cell Expressed Developmentally Down-regulated 4 Gene in Kazak Chinese and Its Association with Hypertension

Objective To analyze the association between the genetic variations of functional region in neural precursor cell expressed developmentally down-regulated 4 ( NEDD4) gene and hypertension in Kazak Chinese in Xinjiang Uygur Autonomous Region. MethodsThe sequences ofNEDD4 gene functional region (all exons, exon-intron boundaries, and the putative promoter region, including the 5'- and 3'-untranslated regions～1 kb) were sequenced in Kazak Chinese patients with hypertension. The representative variations selected were genotyped by TaqMan-PCR method in 938 Kazak individuals, including 451 hypertensive patients and 487 normotensive subjects. The association between genetic variations ofNEDD4 and hypertension in Kazak was analyzed. ResultsThirteen novel and 15 known single nucleotide polymorphism (SNPs) or mutations, including 7 missense mutations, were identified at the function region ofNEDD4 gene in 94 Kazak patients with hypertension. In the nine representative variations genotyped, 4 rare missense mutations 77291T>G (S189R), 77748 C>T (R342W), 123925C>T (P152L), rs1912403 (76821A>G, M33V)] were not specific for the prevalence of hypertension; in addition, the distribution of 5 common SNPs 77943A>C (N407H), rs2303580 (132882G>A, R607Q), rs8028559 (154845T>C), rs7162435 (164420A>G), and rs11550869 (165622C>G)] and haplotypes were not significantly different between the hypertensive patients and normotensive subjects (P>0.05). ConclusionThe NEDD4 gene polymorphisms is no associated with hypertension in Kazak Chinese population.