Liu Yupeng, Wang Yibaina, Hu Fulan, Sun Hongru, Zhang Zuoming, Wang Xuan, Luo Xiang, Zhu Lin, Huang Rong, Li Yan, Li Guangxiao, Li Xia, Lin Shangqun, Wang Fan, Liu Yanhong, Rong Jiesheng, Yuan Huiping, Zhao Yashuang
Department of Epidemiology, Public Health College, Harbin Medical University, Harbin 150081, Heilongjiang Province, The People's Republic of China.
Department of Clinical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, Heilongjiang Province, The People's Republic of China.
Oncotarget. 2017 May 22;8(37):61239-61252. doi: 10.18632/oncotarget.18054. eCollection 2017 Sep 22.
The relationship between gene-specific DNA methylation in peripheral blood leukocytes and colorectal cancer (CRC) susceptibility is unclear. In this case-control study, the methylation status of a panel of 10 CRC-related genes in 428 CRC cases and 428 cancer-free controls were detected with methylation-sensitive high-resolution melting analysis. We calculated a weighted methylation risk score (MRS) that comprehensively combined the methylation status of the panel of 10 genes and found that the MRS_10 was significantly associated with CRC risk. Compared with MRS-Low group, MRS-High group and MRS-Medium group exhibited a 6.51-fold (95% CI, 3.77-11.27) and 3.85-fold (95% CI, 2.72-5.45) increased risk of CRC, respectively. Moreover, the CRC risk increased with increasing MRS_10 ( < 0.0001). Stratified analyses demonstrated that the significant association retained in both men and women, younger and older, and normal weight or underweight and overweight or obese subjects. The area under the receiver operating characteristic curves for the MRS_10 model was 69.04% (95% CI, 65.57-72.66%) and the combined EF and MRS_10 model yielded an AUC of 79.12% (95% CI, 76.22-82.15%). Together, the panel of 10 gene-specific DNA methylation in leukocytes was strongly associated with the risk of CRC and might be a useful marker of susceptibility for CRC.
外周血白细胞中基因特异性DNA甲基化与结直肠癌(CRC)易感性之间的关系尚不清楚。在这项病例对照研究中,采用甲基化敏感的高分辨率熔解分析检测了428例CRC病例和428例无癌对照中一组10个CRC相关基因的甲基化状态。我们计算了一个加权甲基化风险评分(MRS),该评分综合了10个基因的甲基化状态,发现MRS_10与CRC风险显著相关。与MRS低分组相比,MRS高分组和MRS中分组的CRC风险分别增加了6.51倍(95%CI,3.77 - 11.27)和3.85倍(95%CI,2.72 - 5.45)。此外,CRC风险随着MRS_10的增加而增加(<0.0001)。分层分析表明,这种显著关联在男性和女性、年轻人和老年人以及体重正常或体重过轻与超重或肥胖的受试者中均存在。MRS_10模型的受试者工作特征曲线下面积为69.04%(95%CI,65.57 - 72.66%),而联合EF和MRS_10模型的AUC为79.12%(95%CI,76.22 - 82.15%)。总之,白细胞中10个基因特异性DNA甲基化与CRC风险密切相关,可能是CRC易感性的一个有用标志物。