MTHFR基因低表达和环境危险因素与食管癌发生的关系

[目的]了解亚甲基四氢叶酸还原酶基因（MTHFR基因）的表达与食管癌发生的关系，探讨食管癌相关环境危险因素与MTHFR基因表达水平之间的交互作用。[方法]收集97例淮安地区食管癌新发病例的食管癌组织及远端癌旁组织，采用实时荧光定量RT-PCR方法定量分析食管癌组织与癌旁组织中MTHFR基因的表达水平，同时运用单纯病例研究分析MTHFR mRNA水平与环境危险因素之间的交互作用。[结果]MTHFR mRNA表达水平在食管癌组织显著低于癌旁组织，与癌旁组织相比，癌组织的MTHFR mRNA表达水平下调了48％，条件Logistic回归分析表明MTHFR mRNA表达下调与食管组织癌变有统计学关联（OR=I．20，95％CI：1．05～1．37）；饮茶习惯与MTHFR mRNA低表达之间存在拮抗作用，且有剂量一反应关系。饮酒与MTHFR mRNA低表达之间的协同作用无统计学意义。[结论]MTHFR mRNA表达水平可反映食管组织叶酸代谢的能力，其下调与食管癌发生有关；饮茶可拮抗MTHFR mRNA表达缺陷对食管癌发病的影响。

Study on the Relationship between Reduced Expression of MTHFR Gene and Environmental Factors Associated with the Risk for Esophageal Squamous Cell Carcinoma in Huaian Population

[Objective]To determine whether the mRNA expression of MTHFR(methylenetetrahydrofolate reductase) gene is associated with the risk for ESCC (esophageal squarnous cell carcinoma) and the interaction between environmental risk factors and expression level of MTHFR mRNA.[Methods]97 patients with newly diagnosed,untreated ESCC were recruited in Huai' an city.Esophageal cancer tissues and tissues adjacent to the tumors were collected to determine the mRNA levels of MTHFR gene by quantitative real-time reverse tr...