GNB3 C825T和ACE I/D多态性相互作用与子痫前期关系的研究
Interaction Between GNB3 C825T and ACE I/D Polymorphisms in Pre-eclampsia
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摘要: 目的 探讨G蛋白β3亚单位(GNB3)和血管紧张素Ⅰ转换酶(ACE)基因相互作用是否与子痫前期的发生有关联。方法 采用ACE基因PCR扩增片段长度多态性及GNB3基因限制性片段长度多态性方法,对成都地区汉族188例子痫前期及273例正常孕妇进行对照检测。结果 子痫前期及正常孕妇GNB3C825T和ACE I/D位点基因型和等位基因频率在两组之间差异无统计学意义(P>0.05),未见GNB3 C825T等位基因及ACEI/D相互作用与子痫前期发生的危险增加有关(OR 0.439~1.203,P均>0.05)。对联合基因型与血压水平关系的分析发现,正常对照组TT/II基因型携带者其舒张压水平增高〔(77.61±1.26) mmHg(1 mmHg=0.133 kPa)〕,且高于TT/ID〔(70.94±1.64) mmHg〕、CT/ID〔(73.15±0.89) mmHg〕和CT/DD〔(72.57±2.14) mmHg〕基因型携带者(P均P>0.05)。结论 本研究未发现GNB3基因C825T及ACE基因I/D位点的相互作用与中国人(成都地区)子痫前期发病有关联,但发现两基因的相互作用与正常孕妇舒张压水平有关。Abstract: Objective To verify the hypothesis if interaction between the G protein β3 subunit (GNB3) C825T polymorphism and angiotensin-I converting enzyme (ACE) insertion/deletion (I/D) could lead to the increased risk of pre-eclampsia. Methods Analyses of ACEand GNB3genotypes were performed in 188 pre-eclamptic patients and 273 normal pregnant controls by polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism in Chinese population, respectively. Results The distributions of alleles and genotypes for the GNB3C825T and ACE I/D polymorphisms were not found to be significantly associathed with pre-eclamptic status. No significant interaction of the influence of GNB3T allele and ACEgenotypes on the risk of pre-eclampsia was observed (OR 0.439-1.203, all P >0.05). However, we found that in homozygous 825T genotype carriers with the ACE II genotype in controls diastolic blood pressure (DBP) levels showed highest 〔(77.61±1.26) mmHg (1 mmHg=0.133 kPa)〕 among other three genotype combinations 〔TT/ID, (70.94±1.64) mmHg; CT/ID, (73.15±0.89) mmHg; CT/DD, (72.57±2.14) mmHg〕 (all P GNB3825T allele carriers with theACEI/D polymorphism in pre-eclampsia in Chinese population in Chengdu area. However there is the interaction of the two genes on DBP levels in pregnancy women without pre-eclampsia in the population.
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