前列腺癌组织中前列腺癌抗原-1的表达及临床意义

目的:探讨PCa组织中前列腺癌抗原-1(PCA-1)的表达及其临床意义。方法:采用逆转录-聚合酶链反应(RT-PCR)技术,检测45例PCa组织、30例前列腺高分级上皮样内瘤样病变组织(HG-PIN)、43例BPH组织和39例其他肿瘤组织标本中PCA-1 mRNA的表达。免疫组织化学检测不同前列腺组织中PCA-1蛋白的表达。结果:PCa与HG-PIN组织标本中PCA-1 mRNA的阳性表达率分别为80.0%(36/45)和60.0%(18/30),BPH组织及其他肿瘤组织中均未见PCA-1 mRNA的表达。PCA-1 mRNA表达与PCa的临床病理参数之间无明显相关性,差异均无统计学意义(P>0.05)。PCa与HG-PIN组织标本中PCA-1蛋白的阳性表达率分别为75.6%(34/45)和50.0%(15/30),BPH组织及其他肿瘤组织中未见PCA-1蛋白阳性表达。结论:PCA-1仅在PCa组织中表达,且与PCa的临床病理参数无关,有可能作为特异性的肿瘤标志物对PCa进行早期诊断。

Expression of Prostate Cancer Antigen-1 in Prostate Cancer and Its Clinical Significance

OBJECTIVE: To investigate the expression of prostate cancer antigen-1 (PCA-1) in different prostate tissues and analyze its correlation with the clinical parameters of prostate cancer (PCa). METHODS: The expression of PCA-1 mRNA was detected by RT-PCR in the samples from 45 cases of PCa with various clinico-pathologic characteristics, 30 cases of high-grade prostatic intraepithelial neoplasia (HG-PIN), 43 cases of BPH and 39 cases of other carcinoma tissues. The correlation of PCA-1 mRNA expression with the clinical parameters of PCa was statistically analyzed and the PCA-1 expression was examined in different samples by immunohistochemistry. RESULTS: The positive expression rate of PCA-1 mRNA was 88.9% and 60.0% and that of PCA-1 protein was 84.4% and 50.0% in the patients with PCa and HG-PIN, respectively. PCA-1 mRNA and PCA-1 proteins were not expressed in the BPH and other carcinoma tissues. The expression of PCA-1 mRNA was unrelated with the clinical parameters of PCa (P > 0.05). CONCLUSION: It is suggested that PCA-1 is a PCa-specific gene and its expression is unrelated to the clinical parameters of PCa. It might serve as a specific biomarker for the early diagnosis of PCa.