正常前列腺组织中雄激素受体亚型表达

目的 :研究雄激素受体 (AR)亚型在正常人前列腺组织中的表达及其意义。　方法 :14份正常前列腺标本均取自器官捐献者 ,年龄 2 1～ 2 8岁 ,平均 2 5岁。应用氚标技术与聚丙烯酰胺凝胶等电聚焦电泳的方法 ,对正常前列腺组织的AR亚型进行分析。　结果 :在 14份AR阳性的正常前列腺组织中发现有 4个AR亚型的表达 ,其等电点 (pI)分别为 6 .5、6 .0、5 .8和 5 .3。氚标的双氢睾酮 (DHT)与 4种受体亚型的结合 ,可以被非氚标的DHT、睾酮 (T)竞争抑制 ,而孕酮、雌二醇和己烯雌酚对此却无竞争抑制作用。　结论 :在正常人前列腺组织中 ,AR有 4个亚型表达 ,并具有因人而异的表达特征。

Expression of Androgen Receptor Isof orms in Normal Human Prostate

OBJECTIVE: To investigate the expression of androgen receptor (AR) isoforms in normal human prostate. METHODS: Fourteen normal prostatic specimens from donors, aged 25 on average (21-28 yr), were analyzed by high resolution isoelectric focusing (IEF). The expression of AR isoforms was demonstrated in all 14 normal human prostatic tissues. RESULTS: Four types of AR isoforms were detected with isoelectric point value at 6.5, 6.0, 5.8 and 5.3 in 14 prostatic specimens. Binding of 3H-dihydrotestosterone (DHT) to these four AR isoforms was inhibited by the addition of 100-fold excess of DHT and testosterone. No effect of progesterone, estradiol and diethylstilbestrol on tritiated hormone binding was observed. CONCLUSIONS: There are four AR isoforms in normal human prostate. The expression of AR isoforms is different from one another.