新生大鼠痉挛型脑瘫动物模型构建及评价的实验研究

目的:构建SCP动物模型,以期最大程度地模拟SCP的神经行为学及病理形态学改变,并探讨模型的评价方法。方法:清洁级5日龄W istar新生大鼠随机分为两组,实验组结扎双侧颈总动脉,而对照组仅切开颈部皮肤。检测方法分两部分:①两组各取20只新生大鼠,分别于术前、术后不同时期测量体重,术后25天进行神经行为学检测及数据统计分析;②两组各取16只新生大鼠,分别在术后不同时期对脑组织切片、HE染色及光镜观察。结果:①对照组存活率为100%,实验组存活率为85.71%。②术后实验组大鼠体重增长较对照组缓慢,差异有统计学意义(P<0.05)。③行为学检测结果显示,悬吊试验中、斜坡试验中、旷场试验中、拒俘反应试验中、肌张力测试中、不自主运动测试中,各组试验结果进行统计学分析后显示,均P<0.05,表明两组差异有统计学意义。④HE染色光镜观察,实验组脑组织病理改变为小胶质细胞浸润;星形胶质细胞肥大、增生;脑白质结构稀疏、紊乱;脑室周围白质软化灶形成,囊间少突胶质细胞减少;侧脑室扩大且形态多不规则等,对照组无异常。结论:①结扎5日龄新生大鼠双侧颈总动脉经神经行为学检测为成功构建痉挛型脑瘫动物模型;其脑损伤的部位主要在白质,该模型对脑瘫研究有重要意义。

Experimental study on constructing and evaluating the neonatal rat model spastic cerebral palsy

Objective:Experimental study on constructing and evaluating the neonatal model of spastic cerebral palsy,to simulate the changes of neurology pathology on neonatal rats after SCP,and to explore the method of evaluating model further.Methods:The clean five-day-old Wistar neonatal rats were randomly divided into experimental and control group.Bilateral carotid ligation was used to perform on brain damage in 4 experimental group,while the neck skin was cut only in the control group.The experiment was carried o...