To investigate the relationship between G1958A gene polymorphism of methylenetetrahydrofolate dehydrogenase (MTHFD) and occurrence of congenital heart disease (CHD) in North China. Methods One hundred and ninety-two...To investigate the relationship between G1958A gene polymorphism of methylenetetrahydrofolate dehydrogenase (MTHFD) and occurrence of congenital heart disease (CHD) in North China. Methods One hundred and ninety-two CHD patients and their parents were included in this study as case group in Liaoning Province by birth defect registration cards, and 124 healthy subjects (age and gender matched) and their parents were simultaneously selected from the same geographic area as control. Their gene polymorphism of MTHFD G1958A locus was examined with PCR-RFLP, and serum folic acid and homocysteine (Hcy) levels were tested with radio-immunoassay and fluorescence polarization immunoassay (FPIA). Results There existed gene polymorphism at MTHFD G1958A locus in healthy subjects living in North China. The percentages of GG, GA, and AA genotype were 57.98%, 35.57%, and 6.45% respectively, and the A allele frequency was 24.23%, which was significantly different from Western population. No difference was observed when comparing genotype distribution and allele frequency between the case and control groups, so was the result from the comparison between genders. The A allele frequency of arterial septal defect patients’ mothers (10.87%) was significantly lower than that of controls (28.15%) (P=0.014), with OR=0.31 (95% CI: 0.09-0.84), and no difference in the other subgroups. The percentage of at least one parent carrying A allele in arterial septal defect subgroup (43.48%) was significantly lower than that in controls (69.64%) (P=0.017), with OR=0.34 (95% CI: 0.12-0.92). The analysis of genetic transmission indicated that there was no transmission disequillibrium in CHD nuclear families. Their serum folic acid level was significantly higher than that of controls (P=0.000), and Hcy level of the former was higher than that of the latter with no statistical significance (P>0.05). Serum Hcy and folic acid levels of mothers with gene mutation were lower than those of mothers with no mutation. Conclusion No 展开更多
基金This work was supported by the Major State Basic Research Development Program of People’s Republic of China (G1999055904)and the Danone’s Diet and Nutrition Research and Education Grant (DIC2002-08).
文摘To investigate the relationship between G1958A gene polymorphism of methylenetetrahydrofolate dehydrogenase (MTHFD) and occurrence of congenital heart disease (CHD) in North China. Methods One hundred and ninety-two CHD patients and their parents were included in this study as case group in Liaoning Province by birth defect registration cards, and 124 healthy subjects (age and gender matched) and their parents were simultaneously selected from the same geographic area as control. Their gene polymorphism of MTHFD G1958A locus was examined with PCR-RFLP, and serum folic acid and homocysteine (Hcy) levels were tested with radio-immunoassay and fluorescence polarization immunoassay (FPIA). Results There existed gene polymorphism at MTHFD G1958A locus in healthy subjects living in North China. The percentages of GG, GA, and AA genotype were 57.98%, 35.57%, and 6.45% respectively, and the A allele frequency was 24.23%, which was significantly different from Western population. No difference was observed when comparing genotype distribution and allele frequency between the case and control groups, so was the result from the comparison between genders. The A allele frequency of arterial septal defect patients’ mothers (10.87%) was significantly lower than that of controls (28.15%) (P=0.014), with OR=0.31 (95% CI: 0.09-0.84), and no difference in the other subgroups. The percentage of at least one parent carrying A allele in arterial septal defect subgroup (43.48%) was significantly lower than that in controls (69.64%) (P=0.017), with OR=0.34 (95% CI: 0.12-0.92). The analysis of genetic transmission indicated that there was no transmission disequillibrium in CHD nuclear families. Their serum folic acid level was significantly higher than that of controls (P=0.000), and Hcy level of the former was higher than that of the latter with no statistical significance (P>0.05). Serum Hcy and folic acid levels of mothers with gene mutation were lower than those of mothers with no mutation. Conclusion No
文摘目的探讨母亲亚甲基四氢叶酸脱氢酶(methylenetetrahydrofolate dehydrogenase,MTHFD)1、2(MTHFD1、MTHFD2)基因多态性与子代先天性心脏病(congenital heart disease,CHD)的关联。方法采用以医院为基础的病例对照研究,选取2017年11月至2020年3月在湖南省儿童医院就诊的683例单纯CHD患儿的母亲作为病例组,选取同时间段内就诊于同一家医院并排除任何先天畸形的740例儿童的母亲作为对照组。通过问卷调查,收集研究对象的相关暴露信息。完成调查问卷后,采集母亲5 mL静脉血,用于MTHFD1、MTHFD2基因多态性的检测。采用多因素logistic回归模型分析MTHFD1、MTHFD2基因多态性与CHD的关联;采用Haploview 4.2软件的四配子检验法构建单倍型,评估单倍型与CHD的关联;并采用广义多因子降维法和logistic回归法分析基因-基因交互作用与CHD的关联。结果多因素logistic回归分析显示,母亲MTHFD1基因rs11849530位点(GA vs AA:OR=1.49;GG vs AA:OR=2.04)和rs1256142位点(GA vs GG:OR=2.34;AA vs GG:OR=3.25)显著增加子代CHD的发生风险(P<0.05),而母亲MTHFD1基因rs1950902位点(AA vs GG:OR=0.57)和MTHFD2基因rs1095966位点(CA vs CC:OR=0.68)显著降低子代CHD的发生风险(P<0.05)。母亲携带单倍型G-G-G(OR=1.86)、G-A-G(OR=1.35)显著增加子代CHD的发生风险(P<0.05)。交互作用分析显示,母亲MTHFD基因2个位点(MTHFD1 rs1950902、MTHFD1 rs2236222)的一阶交互作用及3个位点(MTHFD1 rs1950902、MTHFD1 rs1256142、MTHFD2 rs1095966)的二阶交互作用可能与CHD的发生风险存在关联(P<0.05)。结论母亲MTHFD1、MTHFD2基因多态性及其单倍型,以及2个位点(MTHFD1 rs1950902、MTHFD1 rs2236222)和3个位点(MTHFD1 rs1950902、MTHFD1 rs1256142、MTHFD2 rs1095966)的交互作用与子代CHD的发生相关。
