6种金属元素对小鼠卵母细胞成熟和体外受精的影响

Effects of 6 kinds of metal elements on meiotic maturation and in vitro fertilizaton on mouse oocyte

为研究镉、铅、镍、锰、铬、铝元素的生殖毒性 ,采用卵母细胞体外培养、体外受精的方法 ,观察它们对卵母细胞成熟和受精能力的影响。结果显示除了铝外 ,其它各金属元素均可以明显降低小鼠超排卵数 ;6个剂量组均可以抑制卵母细胞的成熟 ,显著降低卵母细胞第一极体释放率、体外受精率和细胞存活率 ,对体内卵母细胞的生发泡破裂没有影响 ,但是对体外培养卵母细胞的生发泡破裂有明显的抑制作用 (铝组除外 )。结果提示 ,这些金属元素被人体过量吸收后 ,可以破坏育龄妇女卵母细胞正常成熟 ,使受精能力下降 。

WTBZ To study the effects of Cd, Pb, Ni, Mn, Cr and Al on reproductive toxicity, the meiotic maturation and in vitro fertilization(IVF) of mouse oocytes were studied using in vitro culture and IVF of mouse oocytes. The results showed that except Al(NO 3) 2, the other groups ［CdCl 2, Pb(NO 3) 2, NiCl 2, MnSO 4 and CrCl 3］ could significantly reduce the number of superovulation oocyte. All of them could inhibit the meiotic maturation, the rates of IVF and extruding of the first polar body, but there was no impact on the germinal vesicle breakdown (GVBD) in vivo. The results also showed that except Al(NO 3) 3, other elements could obviously inhibit germinal vesicle breakdown of mouse oocytes. The results suggested that these elements might damage the process of meiotic maturation of oocyte of women at child bearing age oocyte and reduce the fertility and reproductive capacity and result in sterily. WTHZ