CDX2基因甲基化状态在结直肠锯齿状病变中的研究进展
2016-08-09李朝辉韩保卫王云帅郑州大学附属洛阳中心医院河南洛阳471000
李朝辉,韩保卫,王云帅郑州大学附属洛阳中心医院,河南洛阳 471000
CDX2基因甲基化状态在结直肠锯齿状病变中的研究进展
李朝辉,韩保卫,王云帅
郑州大学附属洛阳中心医院,河南洛阳471000
目的观察分析CDX2基因甲基化状态在结直肠锯齿状病变中的状态。方法选取该院在2011年3月—2015年7月期间收治的450例结直肠锯齿状病变患者(136例TSA,122例SSA/P,192例HP),并选取82例正常组织作为对照组,采用METHYLIGHT方法分析结直肠锯齿轮病变中CDX2基因甲基化状态,并采用免疫分析法分析CDX2基因的表达情况,收集相关的临床资料,分析CDX2基因甲基化状态在结直肠锯齿状病变中的状态和相关因素情况。结果正常对照组CDX2基因甲基化率53.38%(44/84),SSA/P组75.41%(92/122),HP组72.97% (140/192),TSA组80.88%(110/136);HP组与正常对照组相比,差异有统计学意义(P=0.009);TSA组与与正常对照组相比,差异有统计学意义(P=0.005);SSA/P组与正常对照组相比,差异有统计学意义(P=0.002)。结论结直肠锯齿状病变中CDX2基因启动子CpG岛中上游区域基化程度高,蛋白表达阳性率高,两者相关性不强,极少部分甲基化状态有可能有诱导CDX2蛋白表达下调的作用。
CDX2基因;甲基化状态;结直肠;锯齿状病变
[Abstract]Objective To observe the analysis of CDX2 methylation state in colorectal serrated lesions.Methods A total of our hospital in March 2011 during July 2015 from 450 cases of colorectal serrated lesions(136 cases of TSA,122 cases SSA/P,192 cases of HP),and select 82 cases of normal tissues as control group,by METHYLIGHT method analysis of colorectal saw gear changes in the methylation status of CDX2 gene,and the use of immune analysis method to analyze the expression of CDX2 gene,collected the clinical data,analysis of CDX2 gene A Methylation status in colorectal serrated lesions status and relevant factors.Results The normal control group of CDX2 gene methylation rate 53.38%44/84,SSA/P group 75.41%92/122,HP group 72.97%(140/192),TSA group 80.88%(110/136);HP group and normal control group compared,difference not obvious,does not have statistical significance(P=0.019).The TSA group and compared with normal control group,the difference is not obvious,does not have statistical significance(P= 0.015);group SSA/P and normal In the control group compared to the difference has statistical significance(P=0.002). Conclusion Colorectal serrated lesions CDX2 gene start promoter CpG island in the upstream region based level is high,the protein expression positive rate is high,the correlation is not strong,very small part of the methylation status may have induced down-regulation of CDX2 protein expression,most of the methyl of may along with the age increased.
[Key words]CDX2 gene;Methylation status;Colorectal;Serrated lesions
在全球范围内,结直肠癌是临床常见的一种恶性肿瘤[1],据临床数据统计,每年结直肠癌死亡人数占全部恶性肿瘤的8%,直接威胁到人类的健康与生命安全[2]。2010世界卫生组织对结直肠癌病变进行了更为详细的分类,包括增生性息肉(HP),占所有病变的75%以上,广基锯齿状腺瘤/息肉(SSA/P)占锯齿状病变的15%~25%[3],而传统型锯齿状腺瘤(TSA)并不常见,占锯齿状病变的1%左右[4]。……
