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大肠息肉中MGMT、XRCC1的表达及临床意义

2016-10-12安艳春董久兴陈海滨

贵州医科大学学报 2016年8期

安艳春, 赵 佳, 董久兴, 陈海滨

(1.中国石油天然气集团公司中心医院, 河北 廊坊 065099; 2.河北工程大学附属医院, 河北 邯郸 056002)



大肠息肉中MGMT、XRCC1的表达及临床意义

安艳春1, 赵佳1, 董久兴1, 陈海滨2

(1.中国石油天然气集团公司中心医院, 河北 廊坊065099; 2.河北工程大学附属医院, 河北 邯郸056002)

目的: 观察MGMT、XRCC1蛋白在大肠息肉中的表达。方法: 采用免疫组织化学方法检测MGMT、XRCC1蛋白在45例大肠增生性息肉组织、50例大肠腺瘤性息肉组织及30例正常大肠黏膜组织中的表达,探讨BRCA1、BRCA2蛋白表达与大肠腺瘤性息肉患者的性别、年龄,息肉部位、直径及是否有蒂的关系,分析MGMT、XRCC1蛋白在腺瘤性息肉组织中表达的相关性。结果: MGMT、XRCC1蛋白在正常大肠黏膜、大肠增生性息肉以及大肠腺瘤性息肉组织中的表达依次增加,差异有统计学意义(P<0.05);在大肠腺瘤性息肉组织中MGMT、XRCC1蛋白的表达与息肉的大小及是否有蒂有关(P<0.05),与患者的性别、年龄及直径无关(P>0.05);MGMT、XRCC1蛋白在腺瘤性息肉组织中表达呈正相关(r=7.356,P<0.05)。结论: BRCA1、BRCA2蛋白的表达与大肠腺瘤性息肉有关。

大肠,腺瘤性息肉; 增生; MGMT蛋白; XRCC1蛋白; 免疫组织化学

[Abstract]Objective: To observe the expression of MGMT, XRCC1 protein in colorectal polyps. Methods: Immunohistochemical SP was adopted to detect the expression of MGMT, XRCC1 protein in 45 cases of colorectal hyperplastic polyps, 50 cases of colorectal adenomatous polyps and 30 cases of normal colorectal mucosa. The relationship between BRCA1, BRCA2 protein expression and sex, age, polyp location, diameter and the pedicle of colorectal adenomas in patients with colorectal adenoma was explored, and the correlation of MGMT and XRCC1 protein expression in the tissues of the polyps was analyzed. Results: The expression of XRCC1, MGMT protein were increased in turn in normal colorectal mucosa, colorectal hyperplastic polyps and colorectal adenoma tissues, and the difference was statistically significant (P<0.05). The expression of XRCC1 and MGMT protein was related to the size of the polyp and whether there is pedicle or not (P<0.05), but not related to the gender, age and diameter of colorectal polyps (P<0.05). XRCC1, MGMT protein expression was positively correlated with the expression of in the tissues of the adenomatous polyps (r=7.356,P<0.05).Conclusion: BRCA1, the expression of BRCA2 protein is related to the colorectal adenoma polyps.

[Key words]colorectal,hyperplastic polyps; hyperplasia; MGMT protein; XRCC1 protein; immunohistochemistry

大肠癌(colorectal cancer,CRC)是常见恶性肿瘤之一,其治疗仍以手术为主[1]。CRC患者的生存率与肿瘤分期密切相关,早期CRC术后5年生存率超过90%,但多数患者确诊时已处于进展期,术后效果并不理想[2]。大肠腺瘤性息肉是CRC的癌前病变期,CRC的病理类型以腺癌最为多见,主要由腺瘤恶变而来,有学者认为CRC是由多种癌基因与抑癌基因相互作用的结果[3]。MGMT、XRCC1基因均为交叉修复基因,在DNA损伤修复、基因转录激活、细胞周期调节等方面发挥着重要作用[4-5]。本文通过观察大肠息肉中MGMT、XRCC1蛋白的表达及其与病理特征的关系,分析MGMT、XRCC1蛋白在CRC预防和诊断中的作用。……

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