ZnO纳米对雌性ICR小鼠急性毒性作用的研究

目的:研究氧化锌(ZnO)纳米颗粒对雌性小鼠的在体毒性作用,着重观察其对雌性小鼠牛殖系统的影响.方法:成年雌性小鼠隔日腹腔注射ZnO纳米(200、500 mg/kg),对照组注射等体积生理盐水,共给药5次.停药1周后,测量各重要脏器的脏器系数,血清生化指标、雌二醇和孕激素的水平,主要脏器作病理切片和HE染色.结果:与对照组相比,给药ZnO纳米(200mg/kg,500mg/kg)的小鼠,肝脏、肾脏和卵巢的脏器系数均显著增加,200ms/kg组的心脏脏器系数显著增加(P均<0.05);给药200 mg/kg和500 mg/kg组小鼠血生化指标中,尿酸(UA)显示增高,且有统计学意义(P<0.05),提示在200～500 mg/kgZnO纳米作用下肾功能有异常;此外,给药200 mg/kg和500 mg/kg组小鼠的乳酸脱氢酶(LDH)增高明显,提示心肌也有轻度的损伤.给药200 mg小鼠的雌二醇、孕酮水平没有统计学筹异(P0.05),生殖系统脏器组织病理也未发现明显异常.结论:200～500 mg/kg ZnO纳米对雌性小鼠肝、肾和心功能有轻度影响,对小鼠的雌孕激素的分泌及卵巢组织无明显影响.因此,200～500 mg/kg ZnO纳米对小剂量ZnO纳米有一定的毒性,而对雌性小鼠生殖系统功能是安全的.

Effects of Zinc Oxide nanoparticles on the main organs in female mice:study in vivo

Objectives:To investigate in vivo the effects of zinc oxide(ZnO) nanoparticles on the main organs of female mice, especially on female reproductive system. Methods:Female mice, aged 5 weeks, were intraperitoneally injected with 200 and 500 mg/kg of zinc oxide (ZnO) nanoparticles, respectively, every other day for 5 times. Control group was injected with equal volume of normal saline. After one week of treatment, the coefficients of organs serum biochemical parameters and gonadal hormone (E2 and P) in female...