【摘要】 目的探讨骨髓干细胞来源的星形胶质细胞是否参与脑损伤后胶质界膜的形成。方法将制作好的雌性Sprague-Dawley大鼠脑损伤模型24h后经尾静脉植入GFP标记的雄性Sprague-Dawley大鼠的骨髓源干细胞。在植入后2、4和8周取脑,用GFAP荧光免疫组织化学方法显示星形胶质细胞,GFP显示骨髓来源细胞,观察损伤组织边缘的胶质界膜中是否存在GFP/GFAP双阳性细胞。结果在损伤组织边缘可见骨髓干细胞来源的星形胶质细胞。结论骨髓干细胞来源星形胶质细胞参与脑损伤后胶质界膜的形成。这对脑外伤的恢复和组织工程材料的植入有重要的意义。更多还原

【Abstract】 Objective To investigate the involvement of bone marrow stem cell-derived astrocytes (BMDSCs) in the formation of glia limitans after brain injury. Methods In a female SD rat model of brain injury, green fluorescence protein (GFP)-labeled BMDSCs from male SD rats were transplanted via the caudal vein 24 h after the injury. The rats were sacrificed at 2, 4 and 8 weeks after the transplantation, and immunohistochemistry for glial fibrillary acidic protein (GFAP) was performed to observe the astrocytes. The fluorescence emitted by GFP was observed to identify the presence of the bone marrow-derived stem cells, and the GFAP+/GFP+ cells in the glia limitnas were detected under fluorescence microscopy. Result The GFAP+/GFP+ cells were found in the glia limitans between the brain lesion and normal brain tissue. Conclusion Bone marrow stem cell-derived astrocytes is involved in glia limitans formation after brain injury, which can be of significance in brain injury recovery and implantation of engineered materials.更多还原