MTHFR基因多态性与原因不明复发性流产的相关性研究

目的探讨亚甲基四氢叶酸还原酶(MTHFR)C677T、A1298C位点单核苷酸多态性与原因不明复发性流产发生的相关性。方法采用病例对照研究的方法,对140例原因不明复发性流产者(流产组)和143例健康妇女(对照组)采集口腔黏膜上皮细胞,并提取基因组DNA,利用荧光定量PCR技术对C677T、A1298C位点进行检查,用统计学方法分析单核苷酸多态性与疾病的关系。结果流产组和对照组的MTHFR C677T位点基因型、等位基因的分布情况差异有统计学意义(P0.05);MTHFR A1298C位点基因型、等位基因的分布情况差异无统计学意义(P0.05);677TT基因型携带者发生流产的风险是677CC基因型携带者的2.732倍,差异有统计学意义(P0.05)。结论不明原因复发性流产的发生与MTHFR C677T位点单核苷酸多态性与具有相关性。

Study on the correlation between MTHFR gene polymorphism and unexplained recurrent spontaneous abortion

Objective To discuss the correlation between MTHFR gene polymorphism and unexplained recurrent spontaneous abortion.Methods A case control study was used in this study,140 patients with unexplained recurrent spontaneous abortion(UR-SA) (abortion group)and 143 cases of normal women(control group)were recruited.Genomic DNA was obtained and extracted from the oral mucosa cells.Fluorescence quantitative PCR was used to examine the MTHFR gene polymorphisms,and Taqman-MGB technology was conducted to analysis the relationship between single nucleotide polymorphism and disease.Results There was statistically significant difference in the frequencies of C677T genotype and alleles between the two groups(P＜0.05).However,no significant difference in the frequencies of A1298C genotype and alleles between the two groups(P＞0.05).Conclusion MTHFR gene C677T polymorphism might be one of the genetic risk factors of URSA.