摘要
本文旨在探讨类固醇激素合成酶在多囊卵巢综合征(polycystic ovary syndrome,PCOS)中的表达变化。将Sprague-Dawley(SD)大鼠随机分为正常对照组(NC组)和多囊卵巢综合征组(PCOS组),PCOS组大鼠注射脱氢表雄酮(dehydroepiandroste rone,DHEA)以建立PCOS模型,用放射免疫法测血清激素(孕酮和雌二醇)水平,酶联免疫法检测血清睾酮水平。取各组卵巢组织,用免疫组化法对3β-羟基固醇脱氢酶(3β-hydroxy steroid dehydrogenase,3β-HSD)、17β-羟基固醇脱氢酶(17β-hydroxy steroid dehydrogenase,17β-HSD)和细胞色素P450芳香化酶(cytochrome P450 aromatase,P450arom)进行细胞定位分析,RT-PCR和Western blot分别检测这三种酶的mRNA和蛋白表达变化。结果显示,与NC组相比,PCOS组血清雌二醇和睾酮水平显著升高,孕酮无显著变化。与NC组相比,PCOS组3β-HSD和17β-HSDmRNA和蛋白表达均显著升高,P450arom的mRNA和蛋白表达则明显降低。以上结果提示,3β-HSD和17β-HSD共同参与了PCOS大鼠模型卵巢的激素调节,P450arom并未直接参与雌二醇的调节。
The aim of the present study was to investigate the expression changes of three steroidogenic enzymes in the polycystic ovary syndrome （PCOS）. Thirty Sprague-Dawley （SD） rats were randomly divided into normal control （NC） group and PCOS group. PCOS rat model was established by DHEA injection. The serum levels of progesterone, estrogen and testosterone were measured by immunoradioassay or enzyme immunoassay. The cellular distributions of 3β-hydroxy steroid dehydrogenase （3β-HSD）, 17β-hydroxy steroid dehydrogenase （17β-HSD） and cytochrome P450 aromatase （P450arom） in ovaries were detected by immunohistochemistry. The expression levels of 3β-HSD, 17β-HSD and P450arom were detected by RT-PCR and Western blot. The results showed that the serum levels of estrogen and testosterone of PCOS group were significantly higher than those of the NC group. There was no signifi- cant difference of serum progesterone level between the PCOS and NC groups. Compared with the NC group, the PCOS group showed increased mRNA and protein expressions of both 3β-HSD and 17β-HSD, as well as reduced P450arom mRNA and protein expressions. These results suggest that 3β-HSD and 1715-HSD, but not P450arom, may participate in the ovarian hormonal regulation in the present rat model of PCOS.
出处
《生理学报》
CAS
CSCD
北大核心
2013年第2期171-177,共7页
Acta Physiologica Sinica
基金
supported by the Scientific Research Fund of Department of Education
Zhejiang Province
China(No.Y200803848)
the Science and Technology Program of Wenzhou Municipality
Zhejiang Province
China(No.Y20080131)
