ObjectiveTo investigate the correlation of X-ray repair cross-complementing gene 1 (XRCC1-Arg399Gln, Arg280His, and Arg194Trp) polymorphisms and susceptibility to gastric cancer. MethodsOne hundred and twenty patients with gastric cancer were included in study group, 120 healthy volunteers were included in control group. The DNA was extracted from peripheral blood. Arg399Gln, Arg280His, and Arg194Trp gene polymorphisms were detected and analyzed using polymerase chain reaction-restriction fragment length polymorphism technique, and the susceptibility between different genotypes and gastric cancer was compared in two groups. ResultsThe age, gender, smoking, drinking, diet, and other common characteristics of exposure factors had no significant differences in two groups (P > 0.05). The mutation locus genotype frequencies of Arg399Gln and Arg280His had no significant differences between two groups (P > 0.05). However, the mutation locus genotype frequencies of Arg/Trp, Trp/Trp, and Arg/Trp+Trp/Trp were higher and the mutation locus genotype frequency of Arg/Arg was lower in the study group as compared with the control group (P < 0.05). ConclusionThe preliminary results from this study shows that XRCC1 Arg399Gln and Arg280His polymorphisms are not correlated with susceptibility to gastric cancer; However, Arg194Trp polymorphism is correlated with susceptibility to gastric cancer.
目的探討DNA損傷修復基因XRCC1 Arg194Trp位點多態性與結直腸癌易感性的關系。 方法選取120例結直腸癌患者與120例正常對照者進行對比研究。取外周血提取DNA，采用限制性片段長度多態性聚合酶鏈反應（PCR-RFLP）技術對XRCC1 Arg194Trp基因多態性進行檢測分析，比較不同基因型與結直腸癌易感性的關系。 結果2組觀察對象在年齡、性別、吸煙、飲酒、飲食特點等常見暴露因素方面的差異均無統計學意義（P＞0.05），變異基因型Arg/Trp＋Trp/Trp出現頻率在2組觀察對象中分別為30.00%和24.17%，差異無統計學意義（P＞0.05）。 結論XRCC1 Arg194Trp位點多態性與結直腸癌的易感性并無顯著相關性。