摘要
目的探讨p16、RASSF1A基因甲基化与肺癌发生及被动吸烟的关系。方法采用Meta分析法研究p16、RASSF1A基因甲基化与中国人群肺癌发生与香烟烟雾暴露的关系;采用焦磷酸测序法检测被动吸烟对小鼠肺组织中p16、RASSF1A基因甲基化程度的影响。结果 (1) Meta分析结果显示,中国肺癌吸烟患者中p16基因甲基化频率显著高于肺癌不吸烟患者(OR=3.77,95%CI:1.88~7.58),差异具有统计学意义(P <0.05);RASSF1A基因甲基化频率显著高于肺癌不吸烟患者(OR=4.59,95%CI:1.39~15.15),差异具有统计学意义(P <0.05);(2)被动吸烟小鼠不同剂量组均未检测出p16和RASSF1A基因甲基化。结论中国人群肺癌患者中p16和RASSF1A基因甲基化高度相关,吸烟造成p16和RASSF1A基因甲基化与肺癌易感性相关;被动吸烟对小鼠p16、RASSF1A基因甲基化的程度未造成影响。
Objective To determine the association between p16, RASSF1 A gene methylation and lung cancer occurrence and passive smoking. Methods Meta-analysis was used to study the association between methylation of p16 and RASSF1 A gene and exposure to cigarette smoke in Chinese population. The effect of passive smoking on the methylation of p16 and RASSF1 A genes in the lung tissue of mice was determined by pyrosequencing. Results(1) Meta-analysis showed that the frequency of p16 gene methylation in Chinese lung cancer smoking patients was significantly higher than that in the non-smokers with lung cancer, OR = 3.77, 95%CI: 1.88-7.58, with significant difference(P < 0.05). The frequency of RASSF1 A gene methylation was significantly higher than that of non-smokers with lung cancer, OR = 4.59, 95%CI: 1.39-15.15, with significant difference(P < 0.05);(2) No methylation of the p16 and RASSF1 A genes was detected in passive smoking mice in different dose groups. Conclusion The methylation of p16 and RASSF1 A gene is highly correlated in lung cancer patients in China. The methylation of p16 and RASSF1 A gene is associated with lung cancer susceptibility to smoking. Cigarette exposure has no effect on the degree of methylation of p16 and RASSF1 A genes in mice.
引文
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