活化白细胞粘附分子在前列腺上皮内瘤和前列腺癌中的表达及意义

目的 :探讨活化白细胞粘附分子 (ALCAM)在前列腺上皮内瘤 (PIN)和前列腺癌中的表达及与前列腺癌临床病理特征的关系。　方法 :用免疫组化EnVisionTM方法检测ALCAM蛋白在 4 1例前列腺癌和癌旁PIN、良性腺上皮的表达情况。　结果 :ALCAM在前列腺腺上皮普遍表达 ,在大部分PIN和低分化的前列腺癌表达增加 ,在部分高分化前列腺癌出现表达降低。ALCAM蛋白表达与前列腺癌病理分级相关 ,与术前血清前列腺特异性抗原水平、肿瘤分期无相关性。　结论 :ALCAM在PIN和前列腺癌中存在表达紊乱 ,提示ALCAM在前列腺癌发生发展中起一定作用。

Expression and Significance of Activated Leukocyte Cell Adhesion Molecule in Prostatic Intraepithelial Neoplasia and Adenocarcinoma

Objective: To investigate the expression of activated leukocyte cell adhesion molecule(ALCAM) protein in prostatic intraepithelial neoplasia and adenocarcinoma, and the relationship between ALCAM expression and clinicopathological features of prostatic carcinoma. Methods: ALCAM protein expression was evaluated in the tissues of 41 human prostatic carcinomas by using immunohistochemistry (EnVision TM method). Results: ALCAM was widely expressed in prostatic epithelia. Overexpression of ALCAM was found in most prostatic intraepithelial neoplasias and low-grade cancers, whereas a decreased expression shown in some high-grade cancers. The ALCAM protein expression in prostatic carcinoma was correlated with pathological grading. However, no correlation of ALCAM expression was found with preoperative serum prostate-specific antigen levels or clinical stages. Conclusion: Expression of ALCAM is disturbed in prostatic intraepithelial neoplasia and adenocarcinoma, indicating its involvement in the development of human prostatic carcinoma.