孕酮对新生鼠缺氧缺血性脑病脑水肿的保护作用

目的探讨孕酮对缺氧缺血性脑病(HIE)新生鼠脑水肿的影响。方法52只7日龄新生Wistar大鼠,随机分为:假手术对照组(A组)、HIE组(B组)、药物预防组(C、D、E组)。动物先行左侧颈总动脉结扎术,再吸入8%氧气和92%氮气混合气体2.5 h,建立HIE动物模型。C、D、E 3组分别于建立模型前30 min给予不同剂量孕酮溶液。24 h观察各组新生鼠海马水肿情况的变化。结果C、D、E 3组海马Na 含量明显低于B组,且D组K 含量明显高于B组(P<0.05),而A、E组K 含量与B组比较均无明显差异(P>0.05)。结论孕酮对新生鼠HIE引起的脑水肿有明显的预防和保护作用。

Protective Effect of Progesterone on Brain Edema in Newborn Rats with Hypoxic- Ischemic Encephalopathy

Objective To observe the protective effect of progesterone on brain edema in newborn rats with hypoxic-ischemic encephalopathy(HIE).Methods Fifty-two 7-day-old neonatal rats were randomly divided into 5 groups:normol control group(group A),hypoxic-ischemic group (group B) and pretreatment groups(group C,D and E).Rats were subjected to left common carotid artery ligation,then were exposed to 8% oxygen and 92% nitrogen for 2.5 hours to establish HIE model.Progesterone was injected intraperitoneally into the groups C,D and E rats respectively at 30 minutes before hypoxia.All rats were killed at the 24 hours after operations,then the contents of water,sodium,potassium were mensurated. Results The contentation of water in group B was higher than that in group A,the contentation of water,sodium in groups C,D and E were significantly lower compared with group B, but the contents potassium were no difference between group C,E and B. Conclusion Progesterone exerts a prominent preventive and protetive effects on the hypoxic ischemic brain edema in newborn rats.