前列腺癌和良性前列腺增生组织中M3受体表达及意义

目的 探讨前列腺组织中胆碱能毒蕈碱受体M3亚型表达在前列腺肿瘤发生发展中的作用.方法 收集正常前列腺、良性前列腺增生、前列腺癌组织标本各36例.应用RT-PCR方法分别测定标本组织中M3受体、血管内皮生长因子(VEGF)的表达情况;蛋白质印迹与免疫组织化学染色方法测定各组标本中M3、VEGF、人白细胞分化抗原34(CD34)的蛋白表达.图像分析系统检测数据,以相对表达强度(目的 物质表达强度/β-actin表达强度)作为统计学分析参数.数据统计分析 计数资料采用方差分析,分类变量资料采用χ2检验,相关性分析采用Pearson方法.结果 前列腺癌组织标本M3受体基因相对表达强度0.8354±0.1897、VEGF基因表达0.7824±0.2047,明显高于良性前列腺增生组织(0.6735±0.1603、0.6021±0.1637)和正常前列腺组织(0.5425±0.1629、0.3436±0.1581),组间差异有统计学意义(P<0.001),3种组织中M3受体与VEGF基因表达呈直线正相关关系(r=0.4999,P<0.001).前列腺癌组织标本M3受体蛋白表达0.4777±0.1638、VEGF蛋白表达0.5718±0.2245,明显高于良性前列腺增生组织(0.3655±0.1474、0.4342±0.1538)和正常前列腺组织(0.2659±0.1076、0.3380±0.1527),组间差异有统计学意义(P<0.05).结论 M3受体表达与前列腺肿瘤的发生发展有关.

Expression of M3 subtype of muscarinic receptors in normal,BPH and prostate cncer tissue

Objective To study the relationship between M3 receptor and prostastic tumor by analyzing the expressions of M3 and vascular endothelial growth factor(VEGF)in adult human normal and neoplastic prostatic gland tissue. Methods The specimens included 36 normal prostates(fresh),36 benign prostatic hyperplasia(BPH)tissue(fresh),and 36 cancer tissue(8 fresh).RT-PCR was used to detect M3 receptor,VEGPs genetic expression.At protein level,VEGF,Ms receptor,CD34 were detected by western-blot and immunohistochemical method. Results VEGF and M3 receptor's genetic expressions were higher in prostate cancer tissue(O.8354±0.1897,0.7824±0.2047)than in BPH tissue(0.6735±0.1603,0.6021±0.1637),while the expressions of these genes were lowest in normal prostate tissue(0.5425±0.1629,0.3436±0.1581)(P<0.001).There was a positive correlation between M3 and VEGFs gene expression(r=0.4999,P