抑制素受体和激活素受体在正常卵巢皮质上的表达及其意义

摘要

目的 探讨卵泡期和黄体期抑制素受体β-多糖、抑制素结合蛋白(INHBP)和激活素受体(ACTR)在正常卵巢皮质上的表达变化及其与内分泌激素水平的关系.方法 采用实时荧光定量PCR和免疫组化方法检测21例卵泡期(卵泡期组)和21例黄体期(黄体期组)正常卵巢皮质中β-多糖、INHBP和ACTR基因表达水平,采用双抗体夹心酶联免疫吸附实验(ELISA)测定外周血血清雌二醇、卵泡刺激素(FSH)、黄体生成素(LH)、抑制素B(INHB)、激活素A(ACTA)水平,并进行受体基因表达水平与激素水平间的相关性分析.结果 (1)卵泡期组ACTRⅠA、ACTRⅠB、ACTRⅡA、ACTRⅡB基因表达水平分别为0.50±0.17、0.050±0.019、0.10±0.04、0.28±0.10,黄体期组分别为0.36±0.18、0.036±0.020、0.07±0.04、0.19±0.11,两组分别比较,差异均有统计学意义(P＜0.05).卵泡期组β-多糖基因表达水平为0.26±0.10,黄体期组为0.17±0.09,两组比较,差异均有统计学意义(P＜0.01).(2)卵泡期组卵巢皮质ACTRⅠA、ACTRⅡA、β-多糖染色强度均高于黄体期组,两组比较,差异有统计学意义(P＜0.05).(3)卵泡期组β-多糖基因表达水平与血清雌二醇、FSH、LH、INHB水平均呈正相关关系[r分别为0.53(P＜0.05)、0.74(P＜0.01)、0.85(P＜0.01)、0.76(P＜0.01)].结论 在卵泡期正常卵巢皮质上抑制素、激活素通过受体途径发挥抑制或促进FSH分泌的作用,从而影响卵泡发育.%Objective To explore the differences in the expression of inhibin(INH)receptors and activin (ACT)receptors in the follicular/luteinic phase in normal human ovaries and their relationship with female endocrine hormone levels.Methods Real time PCR and immunohistochemistry were used to determine the expression of inhibin receptors(INHR)genes,activin receptors(ACTR)genes.Serum estradiol(E2),follicle stimulating hormone(FSH),luteinizing hormone(LH),INHB,ACTA levels were determined by a solid quantitative sandwich enzyme immunoassay technique(Sandwich ELISA)in 21 women during follicular phase and another 21 women during luteinic phase,the correlations between each gene and each hormone were analyzed.Results(1)ACT type Ⅰ and Ⅱ receptors genes(ACTR Ⅰ A,ACTR Ⅰ B,ACTRⅡA,ACTR Ⅱ B)and INH receptor β-glycan genes were expressed higher in the follicular phase than in the luteinic phase:ACTR Ⅰ A(0.50±0.17 vs 0.36±0.18;P＜0.05),ACTR Ⅰ B(0.050±0.019 vs0.036±0.020;P＜0.05),ACTRⅡ A(0.10±0.04 vs 0.07±0.04;P＜0.05),ACTR Ⅱ B(0.28±0.10vs 0.19±0.11;P＜0.05),β-glycan(0.26±0.10 vs 0.17±0.09;P＜0.01).(2)The intensities of ACTR I A,ACTR Ⅱ A,β-glycan immunostaining in human normal ovaries in the follicular phase were significantly stronger compared to those in luteinic phase.In the follicular phase β-glycan expression was positively correlated with serum E2,FSH,LH,INHB levels.The correlation coefficient was 0.53(P＜0.05).0.74(P＜0.01),0.85(P＜0.01)and 0.76(P＜0.01)respectively.Conclusion In normal human ovary in the follicular phase INH and ACT bind their receptors and down-regulate or up-regulate FSH,thus influencing the follicular development.