维生素E拮抗双酚A对卵巢颗粒细胞性激素分泌的抑制作用  被引量:2

Vitamin E could reverse effects of bisphenol A on steroidogenesis in rat ovary granulosa cells

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作  者:陈威威[1] 孙伟杰[1] 王磊[1] 焦先婷[1] 余晓丹[1] 

机构地区:[1]上海交通大学医学院附属新华医院环境与儿童健康教育部和上海市重点实验室,上海200092

出  处:《上海交通大学学报(医学版)》2017年第6期732-737,共6页Journal of Shanghai Jiao tong University:Medical Science

基  金:国家重点基础研究发展计划("973"计划)(2014CB943300);上海市教育委员会高峰高原学科建设计划(20152220)~~

摘  要:目的·研究维生素E能否对双酚A(BPA)的雌性性激素干扰效应起拮抗作用,探索拮抗作用的适宜浓度。方法·提取大鼠卵巢原代颗粒细胞。不同浓度BPA(0、0.01、0.1、1、10、100μmol/L)孵育48 h后,收集并用ELISA法测定细胞培养基中的雌二醇(E_2)及孕酮(P_4)浓度。采用健康女性卵泡液中的平均浓度(简称"人体平均浓度",5μmol/L)或高浓度(25μmol/L)维生素E(α-生育酚)单独孵育或与BPA(10、100μmol/L)共同孵育颗粒细胞48 h后,测定培养液中性激素浓度。结果·10μmol/L及100μmol/L BPA可使大鼠原代卵巢颗粒细胞分泌性激素水平呈浓度依赖性降低(P<0.05)。25μmol/L维生素E单独孵育时可分别使E_2和P_4浓度显著升高(44.89±15.18)%和(43.33±8.82)%(P<0.05);维生素E(5μmol/L或25μmol/L)和BPA共同孵育时,性激素浓度恢复正常,与阴性对照组相比,差异无统计学意义(P>0.05)。结论·人体平均浓度及高浓度维生素E均可拮抗BPA导致的性激素降低效应,而高浓度维生素E的改善效果相对显著。Objective · To investigate whether vitamin E could reverse the disruptive effects of bisphenol A (BPA) on steroidogenesis and to explore the optimal vitamin E concentration. Methods · Rat primary granulosa cells were extracted and exposed to BPA (0, 0.01, 0.1,1,10,100 μmol/L). After 48 h of incubation, culture medium was collected and estradiol (E2) and progesterone (P4) were measured using ELISA kits. Then, granulosa cells were incubated with 5 μmol/L(average concentration in follicular fluid) or 25 μmol/L (high concentration in follicular fluid) vitamin E (α-tocopherol) or vitamin E (5 μmol/ L or 25 μmol/L) plus BPA (10 μmol/L or 100 μmol/L) for 48 h, E2 and P4 were measured. Results · BPA at 10 μmol/L and 100 μmol/L suppressed E2 and P4 production in a dose-dependent manner (P〈0.05). Vitamin E at 25 μmol/L significantly increased E2 and P4 levels by (44.89±15.18) % and (43.33±8.82) % (P〈0.05), respectively. Coincubation of the granulosa cells with BPA and vitamin E (5 μmol/L or 25 μmol/L) restored the productions of E2 and P4, which were not significantly different from the control group (P〉0.05). Conclusion · Vitamin E (5 μmol/L/ 25 μmol/L) could reverse BPA-induced reduction in steroid hormone production in rat ovary granulosa cells, and the antagonistic effect of 25 μmol/L vitamin E was more obvious than that of 5 μmol/L vitamin E.

关 键 词:双酚A 维生素E 卵巢颗粒细胞 雌二醇 孕酮 

分 类 号:R114[医药卫生—卫生毒理学]

 

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