生脉散对VD大鼠行为学及海马组织NOS和神经元细胞凋亡的影响

目的 探讨中药方剂生脉散改善VD模型大鼠认知障碍的作用机制.方法 取健康Wister大鼠,随机分为正常对照组、假手术组、空白模型组、生脉散高剂量组、生脉散低剂量组和尼莫地平组.除正常对照组和假手术组外,其余各组采用双侧颈总动脉永久性结扎法,造成慢性脑灌注不足所致VD模型.术后生脉散低剂量组和高剂量组各自给予生脉散生药10 g/kg/d、30 g/kg/d,尼莫地平组予尼莫地平20/mg/kg/d灌胃,正常对照组、假手术组与空白模型组以等量生理盐水灌胃.通过Moreis水迷宫观察各组大鼠的学习记忆改善情况并检测各组大鼠海马组织中NOS阳性细胞数的变化及海马神经元细胞的凋亡率.结果 大鼠学习记忆能力、海马组织中NOS阳性细胞数及神经元细胞的凋亡率,生脉散低剂量组及尼莫地平组与空白模型组比较,差异有显著性意义(P<0.01);生脉散高剂量组和尼莫地平组相比,差异无显著性意义(P>0.05).结论 生脉散能明显改善VD大鼠的学习记忆能力.对缺血引起的VD具有益智作用,其作用机制可能与降低大鼠海马组织中的NOS阳性细胞数和抑制神经元凋亡有关;生脉散对血管性痴呆大鼠有一定的预防及逆转作用,但不能使其恢复至正常.

Effect of Shengmaisan on learning and memory abilities and hippocampal nitric oxide synthase expression and neuronal apoptosis in rats with vascular dementia

Objective To observe the effect of Shengmaisan on the learning and memory abilities and the expression of nitric oxide synthase and neuron apoptosis in the hippocampus of rats with vascular dementia(VD),and explore the mechanism of Shengmaisan for treatment of VD.Methods Wistar rats were divided randomly in to normal control group,sham-operated group,VD model group,high-dose Shengmaisan group,low-dose Shengmaisan group,and nimodipine group.In the latter 4 groups,bilateral common carotid artery occlusion(BCC...