A transient protective effect of low-level laser irradiation against disuse-induced atrophy of rats

被引:0
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作者
Yung-Ting Kou
Hui-Tien Liu
Chun-Yin Hou
Chuang-Yu Lin
Chung-Min Tsai
Hsi Chang
机构
[1] Taipei Medical University,Department of Pediatrics, Shung Ho Hospital
[2] Taipei Medical University,Department of Pediatrics, School of Medicine, College of Medicine
[3] Taipei Medical University,Graduate Institute of Medical Sciences, College of Medicine
[4] Taipei City Hospital,Department of Family Medicine
[5] Kyoto University,Department of Clinical Application, Center for iPS Cell Research and Application (CiRA)
[6] Taipei Medical University Hospital,Department of Pediatrics
来源
Lasers in Medical Science | 2019年 / 34卷
关键词
Low-level laser irradiation; Disuse-induced atrophy; Myoblast; Enhanced proliferation; Apoptosis; Transient protective effect;
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中图分类号
学科分类号
摘要
Satellite cells, a population of skeletal muscular stem cells, are generally recognized as the main and, possibly, the sole source of postnatal muscle regeneration. Previous studies have revealed the potential of low-level laser (LLL) irradiation in promoting satellite cell proliferation, which, thereby, boosts the recovery of skeletal muscle from atrophy. The purpose of this study is to investigate the beneficial effect of LLL on disuse-induced atrophy. The optimal irradiation condition of LLL (808 nm) enhancing the proliferation of Pax7+ve cells, isolated from tibialis anterior (TA) muscle, was examined and applied on TA muscle of disuse-induced atrophy model of the rats accordingly. Healthy rats were used as the control. On one hand, transiently, LLL was able to postpone the progression of atrophy for 1 week through a reduction of apoptosis in Pax7−veMyoD+ve (myocyte) population. Simultaneously, a significant enhancement was observed in Pax7+veMyoD+ve population; however, most of the increased cells underwent apoptosis since the second week, which suggested an impaired maturation of the population. On the other hand, in normal control rats with LLL irradiation, a significant increase in Pax7+veMyoD+ve cells and a significant decrease of apoptosis were observed. As a result, a strengthened muscle contraction was observed. Our data showed the capability of LLL in postponing the progression of disuse-induced atrophy for the first time. Furthermore, the result of normal rats with LLL irradiation showed the effectiveness of LLL to strengthen muscle contraction in healthy control.
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页码:1829 / 1839
页数:10
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