锌对铅中毒大鼠海马nNOS神经元的影响

Influence of Zinc on lead poisoning Hippocarnpus nNOS Neuron Rats

目的探讨锌对铅暴露大鼠海马nNOS神经元的保护作用。方法4周龄健康Wistar雄性大鼠48只,分为对照组、铅中毒组、葡萄糖酸锌预防组和葡萄糖酸锌治疗组,每组12只。对照组用去离子水灌胃40d;铅中毒组大鼠用15mg/(kg·bw·d)醋酸铅灌胃30d,去离子水灌胃10d;锌预防组用30mg/(kg·bw·d)葡萄糖酸锌和15mg/(kg·bw·d)醋酸铅联合灌胃30d,后用去离子水灌胃10d;锌治疗组用15mg/(kg·bw·d)醋酸铅灌胃30d,后用30mg/(kg·bw·d)葡萄糖酸锌灌胃10d;对照组、铅中毒组、锌预防组和锌治疗组在第40天处死大鼠取海马,分别进行NOS活性测定;β-NADPH组织化学方法观察海马nNOS数量的变化。结果锌预防组和锌治疗组大鼠海马NOS活性高于铅中毒组而低于对照组;锌预防组大鼠海马NOS活性高于锌治疗组;在CA1区和齿状回,除锌预防组外,其它各组nNOS阳性神经元数量明显低于对照组,反应强度变弱;锌预防组和锌治疗组nNOS阳性神经元数量高于铅中毒组;锌预防组大鼠海马nNOS阳性神经元数量高于锌治疗组。结论补锌对铅中毒大鼠海马nNOS神经元的活性和数量都有提高,预防性补锌的效果更好。

Objective To approach protective effect of zinc on lead poisoning hippocampus nNOS neuron of rats.Methods 4 weeks old male wistar rats were divided into 4 groups randomly: blank group、 lead poison group、precaution group with Zinc Gluconate and therapy group with Zinc Gluconate. The blank group, administrated intragastrically with the deionized water for 40 days ; The Lead poisoned group, administered intragastrically with 15 mg/(kg·bw·d) lead acetate for 30 days and with the deionized water for next 10 days...