Neural Regeneration Research ›› 2013, Vol. 8 ›› Issue (14): 1262-1268.doi: 10.3969/j.issn.1673-5374.2013.14.002

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Nanoparticles carrying neurotrophin-3-modified Schwann cells promote repair of sciatic nerve defects

Haibin Zong1, Hongxing Zhao2, Yilei Zhao2, Jingling Jia2, Libin Yang2, Chao Ma2, Yang Zhang1, Yuzhen Dong2   

  1. 1 Functional Laboratory, School of Basic Medical Sciences, Xinxiang Medical College, Xinxiang 453003, Henan Province, China
    2 Department of Orthopedics, the First Affiliated Hospital of Xinxiang Medical College, Weihui 453100, Henan Province, China
  • Received:2012-07-03 Revised:2013-04-25 Online:2013-05-15 Published:2013-05-15
  • Contact: Yuzhen Dong, M.D., Associate chief physician, Associate professor, Master’s supervisor, Department of Orthopedics, the First Affiliated Hospital of Xinxiang Medical College, Weihui 453100, Henan Province, China, dongyuzhen1998@163.com.
  • About author:Haibin Zong, Lecturer.
  • Supported by:

    2010年河南省教育厅高校科技创新人才课题(No. 2010HASTIT036)

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Abstract:

Schwann cells and neurotrophin-3 play an important role in neural regeneration, but the secretion of neurotrophin-3 from Schwann cells is limited, and exogenous neurotrophin-3 is inactived easily in vivo. In this study, we have transfected neurotrophin-3 into Schwann cells cultured in vitro using nanoparticle liposomes. Results showed that neurotrophin-3 was successfully transfected into Schwann cells, where it was expressed effectively and steadily. A composite of Schwann cells transfected with neurotrophin-3 and poly(lactic-co-glycolic acid) biodegradable conduits was transplanted into rats to repair 10-mm sciatic nerve defects. Transplantation of the composite scaffold could restore the myoelectricity and wave amplitude of the sciatic nerve by electrophysiological examination, promote nerve axonal and myelin regeneration, and delay apoptosis of spinal motor neurons. Experimental findings indicate that neurotrophin-3 transfected Schwann cells combined with bridge grafting can promote neural regeneration and functional recovery after nerve injury.

Key words: neural regeneration, peripheral nerve injury, neurotrophin-3, nanoparticle liposome, Schwann cells, sciatic nerve, neuroelectrophysiology, gene transfection, grants-supported paper, neuroregeneration