亚甲基四氢叶酸还原酶基因多态性与先天性心脏病的关联性研究
2021-02-21李倩王华张海燕朱文英
李倩 王华 张海燕 朱文英
【摘 要】目的:分析先天性心脏病(CHD)与亚甲基四氢叶酸还原酶(MTHFR)基因的两个多态位点C677T/rs1801133、A1298C/ rs1801131的相关风险。方法:应用病例-对照研究方法,选择2016年1月至2019年12月在昆山市第一人民医院就诊的129例先心病患儿为病例组,同期的112名无先心病的新生儿为对照组。基因分型采用Taqman探针法,血浆MTHFR水平的检测用间接酶联免疫吸附法。结果:两个位点C677T与A1298C的基因型分布差异在病例组与对照组中无统计学意义(rs1801131 P=0.276;rs1801133 P=0.365),血浆MTHFR水平在病例组与对照组中无统计学差异(P= 0.079)。结论:MTHFR基因遗传变异与先心病的易感性无明显关联,此研究结果尚需大样本研究和后续功能学的进一步验证。
【关键词】先天性心脏病;MTHFR基因;遗传变异
The association study between MTHFR polymorphisms and congenital heart disease
Li Qian, Wang Hua, Zhang Haiyan, Zhu Wenying (corresponding author)
Department of Pediatrics, The First People’s Hospital of Kunshan,Jiangsu, Jiangsu Kunshan 215300, China
【Abstract】Objective: To analyze the risk of congenital heart disease (CHD) and two polymorphic loci C677T / rs1801133 and A1298C / rs1801131 of methylenetetrahydrofolate reductase (MTHFR) gene.Methods: Using the case-control study method, 129 children with congenital heart disease treated in the first people,s hospital of Kunshan from January 2016 to December 2019 were selected as the case group , and 112 newborns without congenital heart disease in the same period were selected as the control group. Taqman probe method was used for Genotyping,ELISA was used to detected the serum MTHFR level.Results: There was no significant difference in genotype distribution of C677T and A1298C between the case group and the control group (rs1801131 P= 0.276; rs1801133 P= 0.365), and there was no significant difference in plasma MTHFR level between the case group and the control group (P= 0.079). Conclusion: There is no significant association between genetic variation of MTHFR gene and susceptibility to CHD. The results of this study need to be further validated by large sample studies and subsequent functional studies.
【Key?Words】Congenital heart disease; MTHFR gene; Genetic variation
先天性心臟病(congenital heart disease, CHD)是胎儿时期心血管异常发育导致的一组畸形的总称,它是在怀孕期间前6周心脏未完全发育,表现为心脏及大血管形成障碍而引起局部解剖结构异常。研究表明,大多数先心病是由遗传和环境因素共同引起,其中同型半胱氨酸(homocysteine,HCY)的代谢异常在先心病的发病机制中有重要作用[1-2]。亚甲基四氢叶酸还原酶(MTHFR)是叶酸代谢中的一种关键酶,其作为甲基的间接供体参与核苷酸的重新合成,维持体内正常的HCY水平。MTHFR基因的单核苷酸多态性(single nucleotide polymorphisms, SNP)可以影响基因的功能从而影响酶的活性,进而影响HCY的代谢水平[3]。本研究对MTHFR基因C677T/ rs1801133和A1298C/rs1801131两多态位点及血浆MTHFR水平与新生儿先心病发生的相关性进行探讨。
1.1 研究对象
病例为2016年1月至2019年12月在江苏省昆山市第一人民医院新生儿科就诊的有明确诊断的先心病新生儿患者,共收集129例。……
