中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (4): 629-636.doi: 10.4103/1673-5374.205104

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

适宜剂量重组人成纤维细胞生长因子2可促进挤压伤颏神经再生和感觉功能的恢复

  

  • 收稿日期:2017-03-17 出版日期:2017-04-15 发布日期:2017-04-15
  • 基金资助:

    韩国健康、福利、家庭事务部健康护理技术R&D项目

Recombinant human fibroblast growth factor-2 promotes nerve regeneration and functional recovery after mental nerve crush injury

Sung Ho Lee1, Wei-Peng Jin1, Na Ri Seo1, Kang-Mi Pang1, Bongju Kim2, Soung-Min Kim1, Jong-Ho Lee1, 3   

  1. 1 Dental Research Institute, Department of Oral and Maxillofacial Surgery, Seoul National University School of Dentistry, Seoul, Korea; 2 Dental Life Science Research Institute, Clinical Translational Research Center for Dental Science, Seoul National University Dental Hospital, Seoul, Korea; 3 Dental Research Institute, Seoul National University, Seoul, Korea
  • Received:2017-03-17 Online:2017-04-15 Published:2017-04-15
  • Contact: Jong-Ho Lee, D.D.S., M.S.D., Ph.D., leejongh@snu.ac.kr.
  • Supported by:

    This study was supported by a grant from the Korea Healthcare Technology R&D Project, Ministry for Health, Welfare & Family Affairs,
    Republic of Korea, No. A101578.

摘要:

研究显示,成纤维细胞生长因子可促进周围神经损伤后的轴突再生,但其对颏神经损伤后的再生与感觉功能恢复的影响尚不明了。由此,实验设计在大鼠颈背部皮下植入微渗泵(osmotic minipump),将重组人成纤维细胞生长因子2以10或50 µg/ml剂量持续泵入颏神经挤压伤部位4周。10µg/mL 重组人成纤维细胞生长因子给药2周时,以Von Frey针刺触觉测量法检测到大鼠皮肤触觉明显恢复,且效果优于50µg/mL重组人成纤维细胞生长因子。Dil 逆行神经元示踪显示,10和50µg/mL 重组人成纤维细胞生长因子给药2和4周后,颏神经损伤大鼠三叉神经节神经元数量明显增加。10µg/mL重组人成纤维细胞生长因子给药4周后还使损伤颏神经轴突密度明显增加。这些结果说明,10µg/mL重组人成纤维细胞生长因子在促进大鼠颏神经再生和感觉功能恢复方面是较为适宜的作用剂量。

ORCID:0000-0002-8843-545X(Jong-Ho Lee)

关键词: 神经再生, 颏神经, 成纤维细胞生长因子, 挤压伤, 感觉功能, 功能恢复

Abstract:

Several studies have shown that fibroblast growth factor-2 (FGF2) can directly affect axon regeneration after peripheral nerve damage. In this study, we performed sensory tests and histological analyses to study the effect of recombinant human FGF-2 (rhFGF2) treatment on damaged mental nerves. The mental nerves of 6-week-old male Sprague-Dawley rats were crush-injured for 1 minute and then treated with 10 or 50 μg/mL rhFGF2 or PBS in crush injury area with a mini Osmotic pump. Sensory test using von Frey filaments at 1 week revealed the presence of sensory degeneration based on decreased gap score and increased difference score. However, at 2 weeks, the gap score and difference score were significantly rebounded in the mental nerve crush group treated with 10 μg/mL rhFGF2. Interestingly, treatment with 10 μg/mL rhFGF had a more obviously positive effect on the gap score than treatment with 50 μg/mL rhFGF2. In addition, retrograde neuronal tracing with Dil revealed a significant increase in nerve regeneration in the trigeminal ganglion at 2 and 4 weeks in the rhFGF2 groups (10 μg/mL and 50 μg/mL) than in the PBS group. The 10 μg/mL rhFGF2 group also showed an obviously robust regeneration in axon density in the mental nerve at 4 weeks. Our results demonstrate that 10 μg/mL rhFGF induces mental nerve regeneration and sensory recovery after mental nerve crush injury.

Key words: nerve regeneration, mental nerve, fibroblast growth factor, crush injury, sensory neuron, functional recovery, neural regeneration