线粒体蛋白Bcl-2和Bax在肿瘤发生中作用的初步探讨

目的:研究线粒体蛋白(MAB1273)、Bcl-2、Bax在肾细胞癌(RCC)组织内的表达及相关性分析.方法:采用免疫组织化学SP方法检测9例嗜酸细胞瘤、6例嫌色细胞癌、23例透明细胞癌以及12例正常肾组织中MABl273、Bcl-2和Bax蛋白的表达.结果:MABl273和Bel-2在嗜酸细胞瘤、嫌色细胞癌、透明细胞癌中表达明显高于正常肾组织(P=0.006,P=0.008).Bax在各组间表达无明显差异(P=0.057).通过秩相关分析,MAB1273的表达与Bcl-2的表达呈正相关(r=0.341,P=0.015),而Bcl-2表达与Bax表达呈负相关(r=-0.287,P=0.043).结论:线粒体蛋白及Bcl-2的高表达、Bax低表达可能共同参与了肾嗜酸细胞瘤、嫌色细胞癌及透明细胞癌的发生,提示线粒体蛋白表达异常参与RCC细胞凋亡调控过程.

A Preliminary Study on the Role of Mitochondrial Protein, Bcl-2 and Bax in Tumorigenesis

Objective: To study the expressions of mitochondrial protein (MAB1273), Bcl-2, and Bax in renal cell carcinoma and to investigate their role in the tumorigenesis. Methods: The expressions of mitochondrial protein, Bcl-2 and Bax were detected by immunohistochemistry SP method in 9 tissue samples of renal on-cocytoma, 6 samples of chromophobe carcinoma, 23 samples of clear cell carcinoma and 12 samples of normal renal tissue. Results: The expression of MAB1273 in renal oncocytoma, chromophobe carcinoma and clear cell carcinoma was much higher than that in normal renal tissue (P=0.006). No significant difference was found in MAB1273 expression among the three types of renal carcinoma. The expression of Bcl-2 was higher in the renal carcinoma groups than in the normal renal tissue group, with a significant difference (P=0.008). The expression of Bax was not different among all of the groups (P=0.057). Rank correlation analysis showed a positive correlation between MAB1273 and Bcl-2 expression (r=0.341, P=0.015). The expression of Bcl-2 was negatively correlated with Bax expression (r= -0.287, P=0.043). Conclusion: Overexpression of mitochondrial protein and Bcl-2 and underexpression of Bax may play a part in the genesis of renal oncocytoma, chromophobe carcinoma and the clear cell carcinoma, indicating that overexpression of MAB1273 may be correlated with apoptosis of renal cell carcinoma cells.