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结直肠癌组织抑癌基因PTEN和癌基因C-myc蛋白表达及其相关性

房学东1,任 辉1,张 研2,田 宇3   

  1. 1.吉林大学第二医院基本外科,吉林 长春 130041;2.吉林大学中日联谊医院胃肠外科,吉林 长春 130033;3.吉林大学中日联谊医院神经外科,吉林 长春 130033
  • 收稿日期:2006-06-22 修回日期:1900-01-01 出版日期:2007-05-28 发布日期:2007-05-28
  • 通讯作者: 房学东

Correlation between expressions of PTEN and C-myc  in colorectal carcinoma

FANG Xue-dong1, REN Hui1, ZHANG Yan2, Tian Yu3   

  1. 1.Department of General Surgery, Second Hospital, Jilin University, Changchun 130041, China; 2.Department of Gastrointesinal Surgery, China-Japan Union Hospital, Jilin University, Changchun 130033, China; 3.Department of Neurosurgery, China-Japan Union Hospital, Jilin University, Changchun 130033, China
  • Received:2006-06-22 Revised:1900-01-01 Online:2007-05-28 Published:2007-05-28
  • Contact: FANG Xue-dong

摘要: 目的:探讨抑癌基因PTEN和癌基因C-myc在结直肠癌发生、发展中的作用及其相关性。 方法:采用免疫组织化学链霉菌抗生物素蛋白-过氧化酶法(S-P法),检测60例结直肠癌组织、10例癌旁组织及8例正常结直肠黏膜中PTEN和C-myc蛋白表达。 结果:结直肠癌组织中,C-myc蛋白表达阳性率为76.70%(46/60),显著高于正常(0)及邻近结直肠(癌旁)组织(10%),组间比较差异均有显著性(P<0.01);C-myc蛋白过度表达与结直肠癌肝转移呈正相关关系(r=5.540,P<0.05),与TNM分期无相关性(r=0.013,P>0.05);结直肠癌组织中,PTEN蛋白表达阳性率为25.00%(15/60),显著低于正常(100%)及邻近结直肠(癌旁)组织(90%)(P<0.01);PTEN蛋白表达与肿瘤分化程度呈正相关(r=0.869,P<0.05),与TNM分期、淋巴结转移和肝转移均呈负相关(r=-0.791,r=-0.741,r=-0.634,P<0.05);C-myc蛋白表达与PTEN蛋白表达水平呈负相关(r=-0.322,P<0.001)。 结论:癌基因C-myc蛋白过度表达不能作为判断结直肠癌肿瘤状态的单独指标;抑癌基因PTEN蛋白的表达缺失在结直肠癌的发生、发展及转移过程中起促进作用,有望成为结直肠癌诊断和预后判断的标记物。

关键词: 癌基因C-myc, 抑癌基因PTEN, 免疫组织化学

Abstract: Abstract:Objective To investigate the correlation between the expressions of tumour suppressor gene PTEN and oncogene C-myc in colorectal carcinoma. Methods The expressions of PTEN and C-myc protein in normal colorectal mucosa(n=8), adjacent non-cancerous tissues(n=10) and primary colorectal carcinoma tissues(n=60) were observed by S-P immunohistochemical assay. Results Of 60 colorectal carcinoma tissues, C-myc protein was detected in 46 cases. The expression rate of C-myc in the primary colorectal carcinoma tissues(76.70%) was significantly higher than that in the normal(0) and adjacent non-cancerous tissues(10%) (P<0.01). Overexpression of C-myc was significantly correlated with hepatic metastasis(r=5.540, P<0.05) and was not related with TNM staging(r=0.013, P>0.05). The positive expression rate of PTEN protein in the primary colorectal carcinoma tissues (25.00%,15/60) was significantly lower than that in the normal(100%) and adjacent non-cancerous tissues(90%) (P<0.01). PTEN protein expression was positively correlated with pathological differentiational degree(r=0.869, P<0.05), negatively with TNM staging, lymph nodes metastasis and hepatic metastasis(r=-0.791,r=-0.741, r=-0.634, P<0.05). The level of C-myc protein expression was negatively correlated with PTEN expression (r=-0.322, P<0.001). Conclusion C-myc protein overexpression can not be used as a clinicopathological parameter to dignose colorectal cancer. The expression of PTEN is closely related to clinicopathological features in colorectal carcinoma, and could be used as a marker of tumour burden of colorectal carcinoma.

Key words: oncogene C-myc, anti-oncogene PTEN, immunohistochemistry

中图分类号: 

  • R735.3