FK506缓释膜片促进外周神经端-侧吻合后神经再生的研究

目的 探讨免疫抑制剂FK506缓释膜片局部应用对周围神经端-侧吻合后神经再生的影响。方法 选用SD大白鼠40只，随机平均分成实验组和对照组。实验组：切断腓总神经，在邻近的胫神经干外膜上开一1mm窗口，将腓总冲经远端与胫神经干做端-侧神经吻合后在吻合口周围放置含有FK506分子可降解缓释膜片。对照组：单纯行神经端-侧吻合：两组分别于术后2、4、8、12周取材，对腓总神经和胫神经干用快蓝（FB）和荧光金（FG）注射标记，取背根神经节（DRG）和脊髓在荧光显微镜下观察被标记细胞。结果 实验组背根冲经节和脊髓内FB标记细胞明显多于对照组。结论 免疫抑制剂FK506能促进外周神经端-侧吻合后神经再生的速度和质量。

An experimental study of promoting peripheral nerve regeneration through slow-releasing diaphragm with FK506 after end-to-side neurorrhaphy

Objective To explore the effect for nerve regeneration with immunosuppresssant FK506 a-round the cut after end-to-side neurorrhaphy of peripheral nerve. Methods There were 40 adult SD rats and were divided into two groups randomly by means. In the experiment group, the right peroneal nerve of SD rat was cut off,then an 1mm epineural window was created on the neighboring tibial nerve,the distal end of peroneal nerve was sutured to the windowed tibial nerve by means of end-to-side attachment, application of slow-releasing diaphragm which was implanted around the nerve anastomosis with FK506. In the contrast group,there were not the FK506 around the cut after end-to-side neurorrhaphy. The tibial and peroneal nerve trunks were labeled by being in jected with fast blue ( KB) and fluorescence golden ( FG) respectively. The labeled cells in the dorsal root ganglia (DRG) and spinal cord were observed by fluorescence microscopy. Results There were a lot of FB labeled cells in the experiment group than in the contrast group in the DRG and spinal cord. Conclusion Immunosuppresssant FK506 could promote nerve regenerative speed and quality after end-to-side neurorrhaphy of peripheral nerve.