丹芪水提液对泼尼松性大鼠脑损害的防治作用

目的 探讨长期超生理剂量糖皮质激素对大鼠所致的脑损害特点, 并观察丹芪水提液对其防治作用。 方法 SD 大鼠予泼尼松2.7 mg·kg^-1灌胃, 每日1 次, 连续12 周, 同时用丹芪水提液高、中、低3种剂量(2.5, 5.0, 10.0 g·kg^-1 ·d^-1) 进行治疗。测试大鼠迷宫记忆力, 检测脑匀浆与神经活动有关的酶含量并对脑组织的形态进行计量学分析。 结果 长期使用糖皮质激素后, 大鼠迷宫正确率明显下降;脑匀浆中超氧化物歧化酶(SOD) 含量降低而单胺氧化酶(MAO) 含量增高(P <0.05);海马神经元出现明显的变性坏死, 皮层结构紊乱;丹芪水提液3 组均可有效预防泼尼松所致的大鼠中枢神经系统的功能和结构的改变, 明显减少糖皮质激素长期应用所造成的不良反应。 结论 长期应用泼尼松可对大鼠造成脑损害, 丹芪水提液对其有较好的对抗作用。

Preventive effects of compound danqi on prednisone-induced cerebra in rats

AIM: To study the cerebra damaged by long-term administration of prednisone, and investigate the preventive effects of compound danqi (CD) in rats. METHODS: 40 SD rats were randomly divided into 5 groups with 8 rats each group.Group 1 was control (NS group), other groups were oral gavages prednisone (2.7 mg·kg^-1 ·d^-1) first, and then plus vehicle (GC group), or plus CD at dose of 2.5, 5.0 or 10.0 g·kg^-1·d^-1, respectively, once a day for 12 weeks.At the experimental endpoint, animals were drawn blood from right ventricle under anesthesia.The left half cerebrum was milled in 10 % homogenate to test the content of mono-amine oxidase (MAO), superoxide dismutase (SOD) and acetylcholinesterase (AchE).The right half cerebrum was for histological observation. RESULTS: The concentration of SOD and AchE decreased, yet MAO increased significantly in GC group.Moreover, histopathology showed that the structure of cerebrum cortex became thinner and hippocampi was in disorder.Dropsical and necrotic nerve cells were found.Yet CD could prevent the changes of nerve centre in prednisone tats. CONCLUSION: Cerebra damage occurs in four-month-old male Sprague-Dawley rats after prednisone-treated for 12 weeks.The treatment of CD in different dose can prevent the damage.