Chinese Journal of Tissue Engineering Research ›› 2020, Vol. 24 ›› Issue (25): 4000-4005.doi: 10.3969/j.issn.2095-4344.2094

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Transplantation of bone marrow mesenchymal stem cells for denervated muscular atrophy  

Yang Ying1, Yan Nan2, Tian Wei1, Han Cao3, Zhang Xiaoyan1, Zheng Xin1, Liu Shidan1, Zhang Shuo1, Wang Zhengdong4   

  1. 1Basic Medical College, 2Rehabilitation Department, 4Anatomy Department, Shenyang Medical College, Shenyang 110034, Liaoning Province, China; 3Central Affiliated Hospital of Shenyang Medical College, Shenyang 110000, Liaoning Province, China

  • Received:2019-12-12 Revised:2019-12-14 Accepted:2020-01-17 Online:2020-09-08 Published:2020-08-24
  • Contact: Wang Zhengdong, MD, Associate professor, Anatomy Department, Shenyang Medical College, Shenyang 110034, Liaoning Province, China
  • About author:Yang Ying, Basic Medical College, Shenyang Medical College, Shenyang 110034, Liaoning Province, China
  • Supported by:
    College Student Innovation and Entrepreneurship Training Plan of Liaoning Province, No. 201610164002 ; Liaoning Provincial Science and Technology Project, No. 2017225059

Abstract:

BACKGROUND: Microscopic surgery or some adjuvant treatments can neither effectively delay nor treat denervated muscle atrophy by repairing damaged nerve cells. Studies have found that bone marrow mesenchymal stem cells have the potential for directional differentiation and repair damaged tissues under certain environmental factors. It is speculated that the cells can play a certain role in repairing denervated atrophic muscles.

OBJECTIVE: To investigate whether transplantation of bone marrow mesenchymal stem cells can alleviate and retard atrophy of denervated muscles.

METHODS: Primary bone marrow mesenchymal stem cells were isolated from Sprague-Dawley rats, and passage 3 cells were labeled by BrdU for cell transplantation. Thirty Sprague-Dawley rats were divided into three groups, 10 rats in each group. In the sham operation group, only the main trunk of the sciatic nerve was exposed but not clamped. In the treatment group, the main trunk of the sciatic nerve was clamped and bone marrow mesenchymal stem cell suspension was injected into the gastrocnemius muscle. In the control group, after the sciatic nerve trunk was clamped, the gastrocnemius muscle innervated by the sciatic nerve was injected with DMEM medium of equal volume (without cells and fetal bovine serum). Basso, Beattie and Bresnahan scores were used to evaluate the motor function of the rat’s left hindlimb at 1 and 2 weeks after cell transplantation. Changes in the gastrocnemius muscle fibers were observed by hematoxylin-eosin staining and BrdU immunohistochemical staining at 14 days after cell transplantation.

RESULTS AND CONCLUSION: The passage 3 bone marrow mesenchymal stem cells were positive for BrdU. The labeled cells could survive in and repair the denervated muscle tissue in the treatment group. Compared with the model group, the denervated muscle fibers of the treatment group recovered from mutual fusion and re-arranged regularly. To conclude, transplantation of bone marrow mesenchymal stem cells can alleviate and retard atrophy of denervated muscles.

Key words:

peripheral nerve injury,  denervated muscle atrophy,  bone marrow mesenchymal stem cells,  cell transplantation,  BrdU,  gastrocnemius muscle 

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