Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (24): 3833-3838.doi: 10.3969/j.issn.2095-4344.2017.24.011

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Effect of modified rabbit defensin 1 on peripheral nerve regeneration

Xu Chun-gui, Zhang Ji-sen, Xu Xin-zhong, Jing Jue-hua   

  1. the Second Hospital of Anhui Medical University, Hefei 230041, Anhui Province, China
  • Revised:2017-07-01 Online:2017-08-28 Published:2017-08-30
  • Contact: Jing Jue-hua, M.D., Chief physician, Associate professor, Master’s supervisor, the Second Hospital of Anhui Medical University, Hefei 230041, Anhui Province, China
  • About author:Xu Chun-gui, M.D., the Second Hospital of Anhui Medical University, Hefei 230041, Anhui Province, China
  • Supported by:

    the Natural Science Foundation of Anhui Province, No. 1608085QH206; the Research Foundation of Anhui Medical University, No. 2015xkj017

Abstract:

BACKGROUND: Peripheral nerve injury is a common disease in clinic, which severely affects the patients’ quality of life. How to promote peripheral nerve regeneration is an issue of concern.
OBJECTIVE: To study the effect of modified rabbit defensin 1 on peripheral nerve regeneration and functional recovery.
METHODS: Eighteen Sprague-Dawley rats were randomly divided into three groups. The rat sciatic nerves were transected and bridged by biodegenerated chitin conduits, followed by the injection of neurotrophic factor (group 1), modified rabbit defensin 1 (group 2) and normal saline (control group) into the gluteus, respectively, for consecutive 7 days.
RESULTS AND CONCLUSION: The sciatic nerve function index in the groups 1 and 2 was higher than that in the control group at 4 weeks postoperatively. The order of motor nerve conductive velocity was as follows: group 1 > group 2 > control group. The diameter regenerated fibers and axons, and the myelin thickness in the group 2 were less than those in the group 1, but were more than those in the control group. These results indicate that the modified rabbit defensin 1 can promote peripheral nerve regeneration, which may be related with the clearance of residual myelin by macrophages and the improvement in nerve regeneration environment.

 

Key words: Defensins, Macrophages, Tissue Engineering

CLC Number: