Objective:To observe the effects of Chinese herbal compound'Jisuikang'on the phagocytosis of microglia and the regeneration of injured neurons in co-culture system.Methods: Prepared drug serum of 'Jisuikang′ and isolated and identified the primary neuron and microglia.The neuron cells were induced apoptosis by glutamic acid and the microglia cells were predisposed by drug serum of'Jisuikang'.Then,the co-culture system of injured neurons and microglia cells was established.24 h and 96 h after co-culture,engulfment of neuron debris by microglia cells and regeneration of injured neurons were observed by immunofluorescence double labeling method.Results: 24 h after co-culture,middle and high dose of'Jisuikang' showed greater phagocytic percentage and phagocytic index than that of control.In comparison of LPS,high dose of'Jisuikang' showed no significant difference.96 h after co-culture,first grade of neuritis of middle and high dose of'Jisuikang' were more than that of control,and there were no significant difference in comparison of LPS.Neuritis' mean length per cell of middle and high dose of'Jisuikang' were larger than that of con-trol.Neuritis' mean length per cell of high dose of'Jisuikang' showed significant difference in comparison of LPS.Conclusion:Traditional Chinese medicine compound'Jisuikang'may enhance engulfment of neuron debris by microglia to improve local microenvi-ronment,which promote the repair and regeneration of injured neurons.%目的:观察中药复方脊髓康对共培养体系中小胶质细胞吞噬及损伤神经元修复再生的影响.方法:制备脊髓康含药血清,分离、鉴定原代海马神经元、原代小胶质细胞,谷氨酸诱导神经元损伤,含药血清预处理小胶质细胞,建立小胶质细胞/损伤神经元共培养体系,采用免疫荧光双重标记法观察混培养24 h后小胶质细胞对神经元碎片的吞噬作用及96 h后损伤神经元突起生长情况.结果:混合培养24 h后,脊髓康含药血清中、高剂量组在吞噬指数及吞噬百分率方面均高于空白组(P<0.05),中剂量组低于脂多糖(Lipopolysaccharide,LPS)组(P<0.05),高剂量组与 LPS组间的差异则无统计学意义(P>0.05).混合培养96 h后,脊髓康含药血清中、高剂量组一级突起数量多于空白组(P<0.05),与LPS组比较差异无统计学意义(P>0.05).脊髓康中、高剂量组平均突起较空白组长(P<0.05),与LPS对比,脊髓康中剂量组平均神经突起较短(P<0.05),而高剂量组则平均突起较长(P<0.05).结论:中药复方脊髓康可能通过促进小胶质细胞吞噬神经元碎片,改善局部微环境,从而促进损伤神经元的修复再生.
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