表皮生长因子在前列腺带性结构中的分布及意义

Distribution of epidermal growth factor in transition zone and peripheral zone of human normal prostate

目的探讨表皮生长因子(EGF)在前列腺移行带和外周带组织中的分布特征。方法RTPCR法半定量分析17例正常前列腺移行带和外周带组织、20例良性前列腺增生(BPH)组织EGFmRNA表达水平,印迹杂交法(Westernblot)检测EGF蛋白表达。结果正常前列腺移行带和外周带EGFmRNA表达量分别为0.96±0.31、0.53±0.27,差异有统计学意义(P<0.05)。BPH组织EGFmRNA表达量为1.67±0.25,显著高于正常移行带组织,差异有统计学意义(P<0.01)。Westernblot方法证实移行带EGF蛋白表达高于外周带,而在BPH组织中表达更强。结论EGF在正常前列腺移行带和外周带组织中的表达存在差异,EGF对移行带生长有重要的促进作用,可能是BPH的发病基础之一。

Objective To investigate the regional differential expression of epidermal growth factor(EGF)in transition/peripheral zones of human normal prostate. Methods RT-PCR was used to determine semi-quantitatively the expression of EGF mRNA in 17 specimens of peripheral /central zones from normal prostates and 20 specimens of periurethral zone from BPH.EGF protein expsession was examined with Western blot. Results In normal prostate tissue,EGF mRNA level in transition zone was significant higher than that in peripheral zone (0.96±0.31 vs 0.53±0.27,respectively,P<0.05). In BPH tissue, EGF mRNA expression was 1.67±0.25,which was also significant higher than that in transition zone of normal prostate (P<0.01).Western blot showed that EGF protein expression in the transition zone was significantly higher than that in peripheral zone,and EGF protein expression in BPH tissue was markedly increased. Conclusions In human normal prostate,expression of EGF in transition zone is significantly higher than that in peripheral zone.This difference has already existed,and may be involved in the initiation of BPH.