中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (1): 136-140.doi: 10.4103/1673-5374.150722

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

预处理同种异体神经移植修复坐骨神经缺损:绿茶多酚与辐照对比谁的效果更好?

  

  • 收稿日期:2014-12-10 出版日期:2015-01-15 发布日期:2015-01-15
  • 基金资助:

    甘肃省科技计划项目(1208RJZA108);兰州军区科研基金课题资助项目(CLZ12JA07)。

Allograft pretreatment for the repair of sciatic nerve defects: green tea polyphenols versus radiation

Sheng-hu Zhou, Ping Zhen, Shen-song Li, Xiao-yan Liang, Ming-xuan Gao, Qi Tian, Xu-sheng Li *   

  1. Orthopedics Center, Lanzhou General Hospital of Lanzhou Military Area Command of Chinese PLA, Lanzhou, Gansu Province, China
  • Received:2014-12-10 Online:2015-01-15 Published:2015-01-15
  • Contact: Xu-sheng Li, M.D., lixush1968@sina.com.
  • Supported by:

    This study was supported by grants from Research Fund of Lanzhou Military Area Command of Chinese PLA, No. CLZ12JA07; Gansu Provincial Science and Technology Program, No. 1208RJZA108 .

摘要:

经辐照和绿茶多酚处理的同种异体神经移植,可较好地消除神经免疫原性,抑制移植早期的免疫排斥反应,可有较强的抗菌作用,有效解决组织保存、神经再生效果和机能恢复、术后感染等问题,但这两种干预方式那种干预效果更好?为此,实验建立大鼠坐骨神经1.0 cm缺损模型,随机分为4组:分别用自体神经、未经处理的异体神经,经辐照处理的或绿茶多酚溶液保存的异体神经移植修复坐骨神经缺损。神经移植后6、12周通过大体、电生理学、组织学、透射电镜观察评价各组修复神经缺损的效果。发现与未经处理的异体神经、经辐照处理(共12 h,剂量率约26.39 Gy/min,总剂量20KGy)的异体神经移植相比较,自体神经与绿茶多酚溶液(1 mg/mL,4℃)保存的异体神经移植后的神经周径与宿主坐骨神经基本一致,可见类似正常神经的结构;运动神经传导速度更快,已长入移植体的新生轴突更多,许旺细胞增生明显,有较多新生血管形成;并有较多髓鞘形成,有大量再生的有髓神经纤维,轴浆内富含微丝、微管等结构。说明绿茶多酚溶液保存的同种异体神经移植与自体神经在修复坐骨神经缺损方面基本可达到一样效果,促进神经再生作用较好,优于辐照处理的异体神经移植。

关键词: 神经再生, 周围神经损伤, 同种异体, 绿茶多酚, 辐照, 坐骨神经, 移植, 神经缺损, 神经修复, 替代材料

Abstract:

Pretreatment of nerve allografts by exposure to irradiation or green tea polyphenols can eliminate neuroimmunogenicity, inhibit early immunological rejection, encourage nerve regeneration and functional recovery, improve tissue preservation, and minimize postoperative infection. In the present study, we investigate which intervention achieves better results. We produced a 1.0 cm sciatic nerve defect in rats, and divided the rats into four treatment groups: autograft, fresh nerve allograft, green tea polyphenol-pretreated (1 mg/mL, 4°C) nerve allograft, and irradiation-pretreated nerve allograft (26.39 Gy/min for 12 hours; total 19 kGy). The animals were observed, and sciatic nerve electrophysiology, histology, and transmission electron microscopy were carried out at 6 and 12 weeks after grafting. The circumference and structure of the transplanted nerve in rats that received autografts or green tea polyphenol-pretreated nerve allografts were similar to those of the host sciatic nerve. Compared with the groups that received fresh or irradiation-pretreated nerve allografts, motor nerve conduction velocity in the autograft and fresh nerve allograft groups was greater, more neurites grew into the allografts, Schwann cell proliferation was evident, and a large number of new blood vessels was observed; in addition, massive myelinated nerve fibers formed, and abundant microfilaments and microtubules were present in the axoplasm. Our findings indicate that nerve allografts pretreated by green tea polyphenols are equivalent to transplanting autologous nerves in the repair of sciatic nerve defects, and promote nerve regeneration. Pretreatment using green tea polyphenols is better than pretreatment with irradiation.

Key words: nerve regeneration, peripheral nerve injury, allograft, green tea polyphenols, irradiation, sciatic nerve, transplantation, nerve defects, nerve repair, alternative, nerual regeneration