雪旺细胞胞浆神经营养蛋白促进周围神经再生的实验

EXPERIMENTAL STUDY ON SCHWANN CELLS CYTOPLASMIC NEUROTROPHIC PROTEINS TO IMPROVE THE REGENERATION OF THE INJURED PERIPHERAL NERVE IN VIVO

目的 研究雪旺细胞胞浆神经营养蛋白 (SDNF)对周围神经再生的影响。方法 选用 90只成年SD大鼠 ,在右侧坐骨神经造成长 10 m m缺损 ,用植入血管的变性骨骼肌桥接神经缺损。分成三组 ,每组 30只。分别将分子量为 2 6、5 8ku的 SDNF和生理盐水 (对照组 )于术中、术后 7及 14天注入肌桥的近段、中段和远段。术后均观察 6个月。术后 15天开始 ,每隔 15天走足印一次 ,测定坐骨神经功能指数。术后 1、3、6个月 ,每组取 10只大鼠行神经电生理检测、比目鱼肌收缩力测定和组织形态学观察。结果 分子量为 2 6、5 8ku的 SDNF两实验组坐骨神经功能恢复指数、神经电生理、比目鱼肌收缩力和形态学观察指标 ,与对照组比较有非常显著性差异 (P<0 .0 1)。结论 分子量为 2 6和 5 8ku的 SDNF有促进损伤的周围神经再生作用。

Objective To study the effects of Schwann cell cytoplasmic derived neurotrophic proteins(SDNF) on the regeneration of peripheral nerve in vivo. Methods Ninty adult SD rats were chosen as the experimental model of degenerated muscle graft with vascular implantation bridging the 10 mm length of right sciatic nerve. They were divided randomly into three groups, 30 SD rats in each groups. 25 μl of 26 ku SDNF (50 μg/ml, group A),58 ku SDNF (50 μg/ml, group B) and normal saline(group C) were injected respectively into the proximal, middle and distal part of the degenerated muscle grafts at operation, 7 and 14 days postoperatively. The motorial function recovery assessment was carried out every 15 days with the sciatic nerve function index(SFI) after 15 days to 6 months of operation. Histological and electrophysiological examination of regenerating nerve were made at 1, 3 and 6 months postoperatively.Results There were significant statistic differences between the both of experimental groups(group A and B) and control group(group C) in the respects of the histological, electrophysiological examination and SFI(P<0.01).Conclusion The 26 ku SDNF and 58 ku SNDF can improve the regeneration of the injured peripheral nerve in vivo.