• 華中科技大學協和深圳醫院(廣東深圳,518052)1 胃腸外科,2 中心實驗室,3 消化內科;
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【摘要】 目的  探討凋亡抑制蛋白Livin與凋亡蛋白Caspase-3在結直腸腺瘤-癌序列中的表達變化及其相關性。 方法  2006年7月—2009年12月,采用免疫組織化學染色鏈霉菌抗生物素蛋白-過氧化物酶鏈接法streptavidin-peroxidese,SP)法檢測18例正常黏膜、84例結直腸腺瘤、72例結直腸癌中Livin及Caspase-3的表達情況。 結果  結直腸腺瘤組織中Livin蛋白的陽性表達率明顯高于正常黏膜組織(P lt;0.05),而低于腺癌組(P lt;0.05);腺瘤組內絨毛狀腺瘤與管狀腺瘤相比較,Livin蛋白表達率差異有統計學意義(P lt;0.05)。結直腸腺瘤組織中Caspase-3的陽性表達率明顯高于正常黏膜組織(P lt;0.05);而腺瘤組織與癌組織之間Caspase-3陽性表達率差異(P lt;0.05);腺瘤組內絨毛狀腺瘤與管狀腺瘤相比較,Caspase-3蛋白陽性表達率差異無統計學意義(P gt;0.05)。Livin表達與Caspase-3表達呈負相關(P lt;0.05)。 結論  凋亡抑制蛋白Livin參與了大腸腫瘤的發生,且在大腸腺瘤-腺癌階段起到了重要作用;凋亡抑制蛋白Livin與Caspase-3表達呈負相關,抑制Caspase-3蛋白的活性可能是Livin促進結腸癌發生的途徑之一。
【Abstract】 Objective  To investigate the expression of Livin and Caspase-3 among colorectal adenoma-carcinoma sequence, and to identify the relationship between Livin and Caspase-3 expression in colorectal adenoma-carcinoma sequence. Methods  Formalin-fixed paraffin embedded colorectal tissues from 174 patients, including 84 adenomas, 72 carcinomas, and 18 normal mucosa, were examined for expression of Livin and Caspase-3 by streptavidin-peroxidase (SP) immunohistochemistry between July 2006 and December 2009. Results  The positive rates of Livin protein expression in colorectal adenoma was significantly higher than that in normal mucosa (P lt;0.05), but lower than that in adenocarcinoma (P lt;0.05); the expression of Livin in tubular adenoma was significantly higher than that in villous adenoma (P lt;0.05). The positive rates of Caspase-3 protein expression in colorectal adenoma were significantly higher than that in normal mucosa and carcinoma (P lt;0.05), and the difference in positive rate of Caspase-3 expression was not significant between the villous adenoma and tubular adenoma (P gt;0.05). Livin expression had negative correlation with the Caspase-3 expression (P gt;0.05). Conclusion  The difference in expression of Livin between adenoma and adenocarcinoma indicates the potential value of it in carcinogenesis of colorectal cancer, which suggestes that suppressing Caspase-3 protein activity is one of the channels by which livin promotes colorectal carcinogenesis.

引用本文: 王永,宋怡才,尹作文,喻軍,劉軍輝,李一帆,郭梅梅. Livin和Caspase-3在結直腸腺瘤-癌序列中的表達及相關性研究. 華西醫學, 2011, 26(6): 878-881. doi: 復制