补阳还五汤对血管性痴呆大鼠行为学和海马神经元形态学的影响

目的观察补阳还五汤对血管性痴呆(VD)大鼠学习记忆能力和海马神经元形态的影响。方法将60只大鼠随机分为5组:正常对照组、假手术组、模型组、补阳还五汤组、尼莫地平组。补阳还五汤组药量为50g/(kg·d),尼莫地平组药量为20mg/(kg·d),共给药30d。模型组、假手术组和正常对照组均给予蒸馏水1mL/100g灌胃。治疗后以Morris水迷宫检测其学习记忆行为能力,以HE染色、Nissl染色检测其神经细胞形态学的变化。结果Morris水迷宫实验中,正常对照组、假手术组、模型组、补阳还五汤组、尼莫地平组的逃避潜伏期分别为:7.67s±3.42s、8.76s±4.03s、29.56s±13.28s、16.96s±7.06s、20.16s±8.89s;探索次数分别为:16.86/min±5.37/min、14.42/min±4.01/min、4.26/min±0.80/min、8.96/min±1.30/min、8.74/min±2.52/min。与正常对照组比较,模型组大鼠逃避潜伏期明显延长(P0.05),平均探索次数显著减少(P0.05);与模型组比较,补阳还五汤组、尼莫地平组大鼠逃避潜伏期明显缩短(P0.05),平均探索次数显著增加(P0.05)。光镜观察显示,补阳还五汤组和尼莫地平组均可见海马CA1区神经元脱失现象明显减轻,数目增多,神经元丢失率明显降低。结论补阳还五汤可以改善VD大鼠学习记忆能力,其机制可能与减轻脑缺血再灌注对海马CA1区神经元的损伤有关。

The Effects of Buyanghuanwu Decoction on Ethology and Morphology of Hippocampal Neurons in Rats with Vascular Dementia

Objective To investigate the effects of Buyanghuanwu decoction on learning and memory ability and hippocampal neurons morphology in rats with vascular dementia(VD).Methods Sixty rats with vascular dementia were randomly divided into five groups:Normal control group,sham-operation group,model group,Buyanghuanwu decoction group treated by Buyanghuanwu decoction,nimodipine group treated by nimodipine for thirty days. The learning and memory ability were tested by Morris water maze experiment and the changes of...