乳腺癌中KAI1蛋白表达与临床病理特征的相关性

目的:研究KAI1蛋白在人乳腺癌中的表达及其与临床病理特征的相关性。方法:应用免疫组织化学S-P法检测107例乳腺癌及30例癌旁乳腺组织中的KAI1蛋白表达情况。结果:乳腺癌组中KAI1蛋白高表达率显著低于正常乳腺组织(P<0.05)。正常组织及非侵袭性乳腺癌中,KAI1蛋白呈高表达;反之,在浸润性乳腺癌中KAI1表达减少。伴有腋窝淋巴结转移的61例乳腺癌中,KAI1蛋白高表达率为21.3%(13/61),无腋窝淋巴结转移组46例中,KAI1蛋白高表达率为39.0%(18/46),两者差异有显著性(P<0.05)。同时发现KAI1蛋白表达与肿瘤大小、年龄无相关性。结论:在乳腺癌进展过程中,KAI1蛋白表达降低在乳腺癌浸润和转移过程中起着重要的作用,检测KAI1蛋白表达可能成为监测人乳腺癌进展及临床上判断其预后的重要参考指标。

Expression of KAI1 protein and its clinicopathological significance in breasf cancer

Purpose: To investigate the expression of KAI1 protein and its clinicopathological significance in breast cancer. Methods: Immunohistochemical staining ( S-P method) was used to detect the expression of KAI1 protein in specimens from 107 breast cancer and 30 adjacent normal breast tissues. Results: KAI1 protein positive rate in breast cancer tissues is significantly lower than that of adjacent nomal breast( P < 0. 01); KAI1 protein levels were higher in normal breast tissues and noninvasive breast cancer (ductal carcinoma in situ), but lower in invasive carcinoma. The high expression rate of KAI1 protein was lower in patients with axillary lymph node metastasis(21. 3%) than that in without lymph node metastasis( 39. 0%) (P < 0. 05) . We found that the high expression of KAI1 was not related to tumor size and age of patients (P > 0. 05). Conclusions: These data suggest that in advanced breast cancer, KAI1 is down-regulated and decrease in KAI1 ecpression plays an important role in the malignant progression of breast cancer. Therefore, detection of KAI1 protein might be a potentially valuable indicator for staging human breast cancer and predicting prognosis.