《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2018, Vol. 24 ›› Issue (6): 634-640.doi: 10.3969/j.issn.1006-9771.2018.06.003

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Effect of Ultrashort Wave on Macrophage Polarization and Inflammatory Response after Spinal Cord Injury in Rats

GAO Lin1, FENG Zhi-ping1, DAI Chen-fei2, ZHANG Zhi-qiang1, ZHANG Li-xin1   

  1. 1. Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110022, China;
    2. Department of Orthopaedics, the Eleventh People's Hospital of Shenyang, Shenyang, Liaoning 110101, China
  • Received:2017-12-12 Revised:2018-04-25 Published:2018-06-25 Online:2018-06-28
  • Contact: ZHANG Li-xin. E-mail: uzhanglx@aliyun.com
  • Supported by:
    Supported by National Natural Science Foundation of China (No. 81101462), Liaoning Natural Science Foundation (No. 201602875) and Liaoning Public Science Foundation (No. 2016003001)

Abstract: Objective To explore the effect of ultrashort wave on macrophage polarization and inflammation response after spinal cord injury in rats.Methods A total of 96 Sprague-Dawley rats were randomly divided into sham group, model group and ultrashort wave group, with 32 rats in each group. The spinal cord injury model was established by modified Allen's method in the model group and the ultrashort wave group. The ultrashort wave group received ultrashort wave since the first day after modeling. BBB score was applied to evaluate the locomotion recovery. HE staining was used to assess the injury area, while immunochemistry, real-time PCR and Western blotting were applied to measure the mRNA and protein expression of inducible nitric oxide synthase (iNOS), arginase-1 (Arg-1) and tumor necrosis factor-α (TNF-α).Results Compared with the model group, the BBB score increased (P<0.05), the expression of iNOS and TNF-α decreased, and the expression of Arg-1 increased (P<0.05). Conclusion Ultrashort wave therapy may promote macrophage polarization from M1 to M2, inhibit inflammatory response and promote recovery after spinal cord injury in rats.

Key words: spinal cord injury, ultrashort wave, macrophage polarization, tumor necrosis factor-α, repair, rats

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