Exposure to Zinc oxide nanoparticles during pregnancy induces oocyte DNA damage and affects ovarian reserve of mouse offspring

文献类型： 外文期刊

第一作者： Zhai, Qiu-Yue

作者： Zhai, Qiu-Yue;Ge, Wei;Wang, Jun-Jie;Sun, Xiao-Feng;Liu, Jing-Cai;Zhao, Yong;Shen, Wei;Ma, Jin-Mei;Feng, Yan-Zhong;Dyce, Paul W.;De Felici, Massimo

作者机构：

关键词： Zinc oxide nanoparticles; oocyte; meiosis; DNA damage; ovarian reserve

期刊名称：AGING-US （ 影响因子：5.682； 五年影响因子：6.38 ）

ISSN： 1945-4589

年卷期： 2018 年 10 卷 8 期

页码：

收录情况： SCI

摘要： Zinc oxide nanoparticles (nZnO) have been shown to have higher toxic effects likely due to their ion-shedding ability and low solubility under neutral conditions. In order to investigate whether exposure to nZnO during embryonic development affects ovary development, 12.5 day post coitum (dpc) fetal mouse ovaries were cultured in the presence of nZnO for 6 days. We found that the nanoparticles (NPs) accumulated within the oocyte cytoplasm in a dose dependent manner, caused DNA damage and apoptosis, and result in a significant decrease in oocyte numbers. No such effects were observed when the ovaries were incubated in the presence of ZnSO4 or bulk ZnO as controls. In addition, we injected intravenously 16 mg/kg body weight nZnO in 12.5 dpc pregnant mice on two consecutive days and analyzed the ovaries of fetuses or offspring at three critical periods of oogenesis: 17.5 dpc, 3 days post-partum (dpp) and 21 dpp. Evidence of increased DNA damage in pachytene oocytes in fetal ovaries and impaired primordial follicle assembly and folliculogenesis dynamics in the ovaries of the offspring were found. Our results indicate that certain types of NPs affect pre- and post-natal oogenesis in vitro and in vivo.

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