骨髓基质细胞自体移植兔坐骨神经的研究
2017-03-18何骁邓莉莉
何骁+邓莉莉



[摘要]目的 观察兔自体骨髓基质细胞作为种子细胞移植修复兔坐骨神经长距离缺损的能力及其安全性,探讨骨髓基质细胞在坐骨神经损伤模型内分化为神经元样细胞的可行性。方法 兔骨髓基质细胞分离培养、诱导、鉴定以及传代后注入坐骨神经损伤的兔模型中,并于细胞移植后第1、2、4、8及16周分别行透射电镜及免疫组化等方法观察。结果 移植侧与对照侧神经纤维均有不同程度再生,但对照侧较移植侧神经纤维数量明显减少(t=175.88,P<0.01)。结论 BMCSs移植能促进兔坐骨神经功能障碍的恢复,并与本身相容性良好,为细胞替代疗法提供了乐观的应用前景。
[关键词]骨髓基质细胞;细胞培养;自体移植;坐骨神经
[中图分类号] R-332 [文献标识码] A [文章编号] 1674-4721(2017)01(c)-0013-04
[Abstract]Objective To observe the ability and safety of autologous bone marrow stromal cells (BMSCs) as seed cells in repairing long distance defect of sciatic nerve in rabbits,and to explore the feasibility of BMSCs differentiating into neuron-like cells in sciatic nerve injury model.Methods BMSCs were injected into rabbit model of sciatic nerve injury,after isolated,cultured,induced,and identificated.Then electron microscope and immunohistochemisty were performed at the 1st,2nd,4th,8th and 16th weeks after cell transplantation.Results After transplantation,there were different degrees of regenerated nerve fibers between transplanted side and controlled side,but the number of nerve fibers was significantly reduced in control group,compared with the transplantation group (t=175.88,P<0.01).Conclusion BMCSs transplantation has a well compatibility,which can promote the recovery of rabbit sciatic nerve dysfunction and provide an optimistic application prospect for cell replacement therapy.
[Key words]Bone marrow stromal cell;Cell culture;Autotransplantation;Sciatic nerve
長距离周围神经缺损的传统治疗方法是自体神经移植,但此治疗方式存在严重缺陷,如为获取供体而导致的其他功能损害。目前干细胞的研究已逐渐深入,关于骨髓基质细胞(bone marrow stormal cells,BMSCs)自体移植修复长距离神经系统损伤的研究也越来越多,并逐渐成为热点[1]。作为自身组织,骨髓具有来源丰富、取材容易、高分裂增殖性、多组织分化潜能及不受免疫排斥等优点,这为细胞移植疗法提供了乐观的应用前景[2]。
本研究旨在识别、跟踪移植后BMSCs的存活状态及与宿主神经组织整合情况,最终为其进一步行体内自体移植治疗的实验应用奠定基础。
1材料与方法
1.1材料
选取体重为1.5~2.0 kg、约3月龄的新西兰兔(New Zealand Rabite)10只,均由南华大学动物中心提供。
1.2试剂
白血病抑制因子(leukemia inhibitory factor,LIF)、兔神经巢蛋白(nestin)抗体由Santa Cruz公司提供;FITC标记山羊抗小鼠IgG、生物素标记山羊抗小鼠IgG试剂盒均由Chemicon公司提供;……
