hUC-MSCs移植联合肾脑复元汤干预对MCAO大鼠及HGF表达的影响Effects of hUC-MSCs Transplantation Combined with Shennao Fuyuan Decoction on the Expression of HGF in MCAO Rats
邹婷,胡国恒,刘侃,王瑾茜,王小菊
摘要(Abstract):
目的通过观察肾脑复元汤及hUC-MSCs对大鼠缺血侧脑组织肝细胞生长因子(HGF)表达的影响,从细胞增殖的角度探讨肾脑复元汤及hUC-MSCs的神经保护作用机制。方法采用大脑中动脉线栓法建立大鼠局灶性脑缺血(MCAO)模型,将SD大鼠随机分成假手术组、模型组、中药(肾脑复元汤)组、干细胞(hUCMSCs)组、联合组5组,每组又分为3、7、14 d 3个时间点,每个时间点5只大鼠,给予不同的灌胃给药及hUCMSCs移植处理,分别于处理后3、7、14 d后次日处死,对大鼠进行神经肌肉功能缺损评分,采用HE染色法观察大鼠海马区细胞形态变化,Western blotting法观察缺血侧脑组织HGF的表达。结果 1)灌胃给药3 d后hUCMSCs移植神经功能缺损评分减少,联合组神经功能缺损评分明显减少(P <0.05);灌胃给药及干细胞移植7、14 d后,灌胃给药及hUC-MSCs移植均能够使神经功能缺损评分减少;2)模型组各时间点大鼠海马CA1区及DG区神经元出现异常变化,且有许多神经细胞出现变性坏死。中药组、干细胞组各时间点CA1区和DG区神经元介于模型组与假手术组之间,联合组与假手术组随着用药时间的延长,神经元相似度越接近;3)灌胃给药3 d后,干细胞组HGF表达与模型组比较差异具有统计学意义(P <0.05),联合组比较有显著统计学意义(P <0.01);灌胃给药及干细胞移植7、14 d后大鼠血清HGF的表达增高差异有统计学意义,二者联合效果更佳。结论肾脑复元汤、hUC-MSCs均能促进HGF的表达,肾脑复元汤主要在恢复期发挥作用,hUC-MSCs各期均能促进HGF的表达,二者联合效果更佳,这可能是促进神经功能恢复的机制之一。
关键词(KeyWords): 脑缺血;肾脑复元汤;hUC-MSCs;HGF;大鼠
基金项目(Foundation): 国家自然科学基金项目(81273751;81273941)
作者(Author): 邹婷,胡国恒,刘侃,王瑾茜,王小菊
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