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首页> 外文期刊>Digestive Diseases and Sciences >Potential role of apoptosis and apoptotic regulatory proteins in colorectal neoplasia: correlations with clinico-pathological parameters and survival.
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Potential role of apoptosis and apoptotic regulatory proteins in colorectal neoplasia: correlations with clinico-pathological parameters and survival.

机译:凋亡和凋亡调节蛋白在大肠肿瘤中的潜在作用:与临床病理参数和生存率的关系。

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摘要

An imbalance between apoptotic and proliferative processes is believed to underlie colorectal neoplasia. We evaluated the expression of bcl-2, p53, mdm2 proteins, and apoptosis in colorectal neoplasms, as well as their correlation with clinico-pathological parameters, using image analysis. Biopsies from 46 colorectal cancers, 121 adenomas, and 25 controls were studied using monoclonal antibodies against p53, bcl-2, mdm2 and the terminal deoxynucleotidyl-transferase-mediated dUTP nick end labeling (TUNEL) method for apoptosis. P53 and bcl2 protein expression was higher in adenomas >or=1 cm (P < 0.03) and tubulovillous-villous adenomas (P < 0.03), and correlated with dysplasia (P < 0.03). In Cox regression analysis, Dukes' stage was the most significant independent prognostic indicator of a worse survival (P < 0.019), whereas when stage was eliminated, bcl-2 expression was also a powerful predictor for bad prognosis (P = 0.02).In conclusion, both bcl-2 and p53 immunohistochemical profiles may be useful adjuncts in detecting adenomas with a malignant potential, whereas bcl-2 could be used in combination with Dukes' stage as a predictor of prognosis in colorectal cancer.
机译:凋亡和增生过程之间的失衡被认为是结直肠瘤形成的基础。我们使用图像分析评估了大肠肿瘤中bcl-2,p53,mdm2蛋白的表达和细胞凋亡,以及它们与临床病理参数的相关性。使用针对p53,bcl-2,mdm2的单克隆抗体和末端脱氧核苷酸转移酶介导的dUTP缺口末端标记(TUNEL)方法研究了来自46个大肠癌,121个腺瘤和25个对照的活检组织。 P53和bcl2蛋白表达在≥或等于1 cm的腺瘤(P <0.03)和肾小管-绒毛状腺瘤(P <0.03)中较高,并且与不典型增生相关(P <0.03)。在Cox回归分析中,Dukes分期是生存率降低的最重要独立预后指标(P <0.019),而当消除分期时,bcl-2表达也是不良预后的有力预测因子(P = 0.02)。结论,bcl-2和p53免疫组化谱可能是检测具有恶性潜能的腺瘤的有用辅助手段,而bcl-2可以与Dukes分期结合使用作为大肠癌预后的预测指标。

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