中药髓复康促进脊髓内神经纤维修复与再生的实验研究

作者	单位
黄宇明	首都医科大学附属北京天坛医院神经内科
赵永青	武警医学院附属医院脑系科中心
田伟	中国中医科学院骨伤科研究所
李莉	中国中医科学院骨伤科研究所
韩凤岳	中国中医科学院骨伤科研究所

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中文摘要:

目的探讨实验性脊髓损伤后神经生长相关蛋白(GAP-43)和神经丝蛋白(NF)表达以及中药髓复康对GAP-43和NF表达的调节作用。方法选用54只雄性成年SD大鼠,其中48只在无菌手术下造成第12胸髓右侧半横断损伤模型。术后随机分成髓复康组(S)和模型对照组(B)。每组随机分成3、7、15、30天共4个时间点。S组术后灌喂髓复康颗粒剂溶液(SFK),B组灌喂等量生理盐水,另6只为正常对照组(N)不做任何处理。在相应的时间点处死大鼠取材,制备石蜡切片,GAP-43和NF免疫组化染色,显微观察和半定量图像分析GAP-43和NF阳性表达物的光密度值(OD)。结果(1)脊髓损伤后7天,B组的NF阳性表达物OD值明显的下调,与N组比较,差异有显著性(P<0.05),且以后维持在低水平。S组NF阳性表达物OD值明显的上调,与N组和S组比较,差异有显著性(P<0.05),15天达高峰,30天时下降,与N组接近;(2)脊髓损伤后3天,B组GAP-43阳性表达物的OD值降低,明显低于N组(P<0.05),S组GAP-43阳性表达物的OD值升高,明显高于N组和B组,组间差异有显著性(P<0.05)。7天后,B组GAP-43阳性表达物的OD值略回升,接近N组的,而S组的GAP-43阳性表达物的OD值仍然维持在高于N组和B组的水平,组间差异有显著性(P<0.05)。结论髓复康通过上调神经元GAP-43和NF阳性表达物的OD值促进损伤神经纤维的修复与再生。

英文摘要:

Objective To study the change in expressions of nerve growth related protein (GAP-43) and neurofilament (NF) after experimental injury of spinal cord, and the regulatory effect of Chinese medicine Suifukang (SFK) on them. Methods Forty-eight from the 54 selected adult SD rats were established into spinal cord injury model by making hemitransection at the T12 level, and randomly divided into two groups, the SFK group feed with SKF contained liquor and the model group feeding with equal volume of saline. The another 6 rats were untreated and taken as the normal group. All rats were sacrificed in batches at different time points of day 3, 7, 15 and 30 after modeling. The spinal cord was obtained for determining the optic density (OD) of positive expression of GAP-43 and NF with immunohistochemical stain by microscopic and semi-quantitative image analysis. Results (1) OD of NF in the model group was obviously decreased on day 7, showing significant difference to that in the normal group and that in the SFK group (P<0.05), and it maintained at low level after then, while the OD of NF in the SFK group was obviously higher than that in the model group (P<0.05), it arrived the peak on day 15 and then dropped near the level in the normal group on day 30;(2) OD and of GAP-43 in the model group obviously decreased on day 3 (P<0.05), showing significant difference to that in the normal group (P<0.05), then it returned to approach to the level in the normal group on day 7. It was higher in the SFK group than in the model group on day 3, and maintained the high level to day 7, at that time, it was still higher than that in the model group and also higher than that in the normal group (P<0.05).Conclusion SFK can promote the repair and regeneration of injured nerve fibers in spinal cord by up-regulating the expression of GAP-43 and NF.

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