化学萃取同种异体神经种植许旺细胞的体外实验

目的：通过自体许旺细胞与化学萃取同种去细胞异体神经桥接物体外结合培养的研究，寻找一种在结构功能上与自体神经相似而抗原性少或无的物质来修复较长距离的神经缺损。方法：使用近交系F344乳鼠和双差速贴壁及Arab-C抑制成纤维细胞生长的细胞培养方法来获得大量纯度的许旺细胞。成年SD大鼠作为异体神经来源，利用化学萃取去除其中细胞成分降低其抗原性，制备去细胞神经桥接物，再把前者通过微注射方法注入到后者内部继续培养观察细胞生长情况。用抗S-100标记许旺细胞计算纯度，用HE染色、电镜观察神经萃取及细胞种植其内后生长情况。结果：许旺细胞培养纯度达92%以上。Triton-X-100及脱氧胆酸钠具有完全萃取掉神经纤维中的许旺细胞及髓鞘，萃取后所得到的桥接物适合于许旺细胞体外生长，并且细胞在其内有迁移排成行的特性。结论：通过化学萃取方法所得到的异体去细胞神经桥接物种植自体许旺细胞后可能为一种理想的神经缺损修复材料。

Study of planting isogenous Schwann cells into chemical extracted allogenous nerve in vitro

Objective To look for an ideal substance to repair large gap of nerve defect after injuries by culture,population of Schwann cells(Scs)and preparation of acellular allogenous nerve grafts with chemical extraction. Method The double adhesion culture and Arab c to prohibit the fibroblast growth were used to achieve high purified Scs;detergents:Triton X 100 and sodium deoxycholate were used to achieve acellural nerve grafts (ANG);and finally the Scs were micro injected into the acellural nerve grafts and the consequence studied Result By the way above,high purified Scs and the ANG was acquired,which can integrated each other well Scs can survived and transformed to aline in vitro Conclusion ANG populated isogenous Scs may be an ideal substance to repair the large gap of nerve defect after injuries