In this study, we successfully constructed a composite of bone marrow mesenchymal stem cells and a chitosan-collagen scaffold in vitro, transplanted either the composite or bone marrow mesenchymal stem cells alone int...In this study, we successfully constructed a composite of bone marrow mesenchymal stem cells and a chitosan-collagen scaffold in vitro, transplanted either the composite or bone marrow mesenchymal stem cells alone into the ischemic area in animal models, and compared their effects. At 14 days after co-transplantation of bone marrow mesenchymal stem cells and the hi- tosan-collagen scaffold, neurological function recovered noticeably. Vascular endothelial growth factor expression and nestin-labeled neural precursor cells were detected in the iscbemic area, surrounding tissue, hippocampal dentate gyrus and subventricular zone. Simultaneously, a high level of expression of glial fibrillary acidic protein and a low level of expression of neuron-spe- cific enolase were visible in BrdU-labeled bone marrow mesenchymal stem cells. These findings suggest that transplantation of a composite of bone marrow mesenchymal stem cells and a chi- tosan-collagen scaffold has a neuroprotective effect following ischemic stroke.展开更多
目的:探讨纤维蛋白胶联合几丁聚糖-胶原导管修复兔面神经损伤的效果。方法:30只健康中国大耳白兔随机分成3组,分别为显微外科吻合组(Ⅰ组)、纤维蛋白胶粘合组(Ⅱ组)、纤维蛋白胶联合几丁聚糖-胶原导管粘合组(Ⅲ组)。手术制作兔右侧面神...目的:探讨纤维蛋白胶联合几丁聚糖-胶原导管修复兔面神经损伤的效果。方法:30只健康中国大耳白兔随机分成3组,分别为显微外科吻合组(Ⅰ组)、纤维蛋白胶粘合组(Ⅱ组)、纤维蛋白胶联合几丁聚糖-胶原导管粘合组(Ⅲ组)。手术制作兔右侧面神经下颊支损伤模型,分别采用显微外科吻合、纤维蛋白胶粘合以及在几丁聚糖-胶原导管内用纤维蛋白胶粘合技术进行修复。术后16周进行大体观察、神经电生理检测、组织学观察、图像分析,采用SPSS 17.0统计软件对各组数据进行方差分析(one way ANOVA),以评价神经再生恢复情况。结果:16周时肉眼观察3组吻合口处均见神经再生。几丁聚糖-胶原导管吸收明显,能抑制吻合口周围纤维结缔组织形成。Ⅰ组再生神经周围软组织粘连较Ⅱ组和Ⅲ组严重;3个组神经肌肉功能恢复良好,口轮匝肌动作电位潜伏期和复合神经肌肉动作电位振幅(M波)检测结果经统计学分析无统计学意义(P>0.05);组织学观察3组均可见不同程度纤维结缔组织和新生毛细血管增生及炎性细胞浸润,无论是HE低倍镜还是Gomori银染高倍镜观察,纤维蛋白胶和几丁聚糖-胶原导管作用明显;图像分析结果提示3组轴突再生率不同(P<0.05),Ⅱ组、Ⅲ组均高于Ⅰ组,其中Ⅱ组明显高于Ⅰ组且差异有统计学意义(P<0.01);3个组再生轴突恢复比相似(P>0.05)。结论:几丁聚糖-胶原导管生物相容性良好,与纤维蛋白胶联合应用修复兔面神经损伤操作简便、效果肯定。展开更多
基金funded by a grant from Shaanxi Provincial Support Project of Scientific Research Development Plan of China,No.2012KCT-16
文摘In this study, we successfully constructed a composite of bone marrow mesenchymal stem cells and a chitosan-collagen scaffold in vitro, transplanted either the composite or bone marrow mesenchymal stem cells alone into the ischemic area in animal models, and compared their effects. At 14 days after co-transplantation of bone marrow mesenchymal stem cells and the hi- tosan-collagen scaffold, neurological function recovered noticeably. Vascular endothelial growth factor expression and nestin-labeled neural precursor cells were detected in the iscbemic area, surrounding tissue, hippocampal dentate gyrus and subventricular zone. Simultaneously, a high level of expression of glial fibrillary acidic protein and a low level of expression of neuron-spe- cific enolase were visible in BrdU-labeled bone marrow mesenchymal stem cells. These findings suggest that transplantation of a composite of bone marrow mesenchymal stem cells and a chi- tosan-collagen scaffold has a neuroprotective effect following ischemic stroke.
文摘目的:探讨纤维蛋白胶联合几丁聚糖-胶原导管修复兔面神经损伤的效果。方法:30只健康中国大耳白兔随机分成3组,分别为显微外科吻合组(Ⅰ组)、纤维蛋白胶粘合组(Ⅱ组)、纤维蛋白胶联合几丁聚糖-胶原导管粘合组(Ⅲ组)。手术制作兔右侧面神经下颊支损伤模型,分别采用显微外科吻合、纤维蛋白胶粘合以及在几丁聚糖-胶原导管内用纤维蛋白胶粘合技术进行修复。术后16周进行大体观察、神经电生理检测、组织学观察、图像分析,采用SPSS 17.0统计软件对各组数据进行方差分析(one way ANOVA),以评价神经再生恢复情况。结果:16周时肉眼观察3组吻合口处均见神经再生。几丁聚糖-胶原导管吸收明显,能抑制吻合口周围纤维结缔组织形成。Ⅰ组再生神经周围软组织粘连较Ⅱ组和Ⅲ组严重;3个组神经肌肉功能恢复良好,口轮匝肌动作电位潜伏期和复合神经肌肉动作电位振幅(M波)检测结果经统计学分析无统计学意义(P>0.05);组织学观察3组均可见不同程度纤维结缔组织和新生毛细血管增生及炎性细胞浸润,无论是HE低倍镜还是Gomori银染高倍镜观察,纤维蛋白胶和几丁聚糖-胶原导管作用明显;图像分析结果提示3组轴突再生率不同(P<0.05),Ⅱ组、Ⅲ组均高于Ⅰ组,其中Ⅱ组明显高于Ⅰ组且差异有统计学意义(P<0.01);3个组再生轴突恢复比相似(P>0.05)。结论:几丁聚糖-胶原导管生物相容性良好,与纤维蛋白胶联合应用修复兔面神经损伤操作简便、效果肯定。
