爱普列特抑制体外培养的大鼠前列腺上皮细胞生长(英文)

目的:研究爱普列特对体外培养前列腺上皮细胞表皮生长因子受体和胰岛素样生长因子-Ⅰ受体表达的影响,探讨其抗前列腺增生的分子机制。方法:MTT法检测爱普列特对外源性表皮生长因子(epider-mal growth factof,EGF),胰岛素样生长因Ⅰ(insulin-like growth factor Ⅰ,IGF-Ⅰ)诱导的大鼠前列腺上皮细胞增殖的作用,逆转录PCR及流式细胞术定量检测体外培养前列腺上皮细胞EGFR和IGF-ⅠR mRNA及蛋白表达。结果:爱普列特180nmol/L和360nmol/L可以明显抑制IGF-Ⅰ5,25μg/L诱导的细胞增殖;爱普列特360 nmol/L可以抑制EGF25μg/L诱导的细胞增殖;爱普列特360nmol/L可以明显下调EGFR、IGF-ⅠR mRNA的表达,而爱普列特180nmol/L则没有明显作用;爱普列特180nmol/L和360nmol/L均可以明显下调EGFR和IGF-ⅠR蛋白的表达。结论:爱普列特抗前列腺增生的分子机制与纠正增生时异常表达的生长因子有关。

Inhibition of cultured rat prostatic epithelial cell growth by epristeride in vitro

AIM: To study the molecular mechanism of rat prostate atrophy induced by epristeride. METHODS: MTT test was used to determine the effect of epristeride on the growth of prostatic epithelial cell induced by exogenous epithelial growth factor (EGF) or insulin-like growth factor-I (IGF-I). RT-PCR and flow cytometry were then used to quantitatively detect the mRNA and protein expressions of EGFR and IGF-I R of the epithelial cells treated or untreated with epristeride. RESULTS: Epristeride attenuated growth of epithelial cells induced by exogenous EGF, IGF-I. Epristeride 360 nmol/L inhibited EGFR and IGF-I R expression at mRNA level, while epristeride 180 nmol/L had no marked effect on EGFR and IGF-I R mRNA expression. Both epristeride 180 nmol/L and 360 nmol/L could down regulate EGFR and IGF-I R protein levels. CONCLUSION: The molecular mechanisms of prostatic epithelial cell atrophy induced by epristeride might be associated with alteration in the expression of growth factor receptors such as EGF and IGF-I.