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High Final Energy of Low-Level Gallium Arsenide Laser Therapy Enhances Skeletal Muscle Recovery without a Positive Effect on Collagen Remodeling.
de Freitas, Carlos Eduardo Assumpção; Bertaglia, Raquel Santilone; Vechetti Júnior, Ivan José; Mareco, Edson Assunção; Salomão, Rondinelle Artur Simões; de Paula, Tassiana Gutierrez; Nai, Gisele Alborghetti; Carvalho, Robson Francisco; Pacagnelli, Francis Lopes; Dal-Pai-Silva, Maeli.
Afiliação
  • de Freitas CE; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Bertaglia RS; Department of Physiotherapy, University of Oeste Paulista (UNOESTE), Presidente Prudente, SP, Brazil.
  • Vechetti Júnior IJ; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Mareco EA; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Salomão RA; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • de Paula TG; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Nai GA; Post Graduate Program in General and Applied Biology, Bioscience Institute, State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Carvalho RF; Department of Pathology, University of Oeste Paulista (UNOESTE), Presidente Prudente, SP, Brazil.
  • Pacagnelli FL; Department of Morphology, Bioscience Institute State University of São Paulo, UNESP, Botucatu, SP, Brazil.
  • Dal-Pai-Silva M; Department of Physiotherapy, University of Oeste Paulista (UNOESTE), Presidente Prudente, SP, Brazil.
Photochem Photobiol ; 91(4): 957-65, 2015.
Article em En | MEDLINE | ID: mdl-25752215
The aim of this study was to evaluate the effects of a Gallium Arsenide (GaAs) laser, using a high final energy of 4.8 J, during muscle regeneration after cryoinjury. Thirty Wistar rats were divided into three groups: Control (C, n = 10); Injured (I, n = 10) and Injured and laser treated (Injured/LLLT, n = 10). The cryoinjury was induced in the central region of the tibialis anterior muscle (TA). The applications of the laser (904 nm, 50 mW average power) were initiated 24 h after injury, at energy density of 69 J cm(-1) for 48 s, for 5 days, to two points of the lesion. Twenty-four hours after the final application, the TA muscle was removed and frozen in liquid nitrogen to assess the general muscle morphology and the gene expression of TNF-α, TGF-ß, MyoD, and Myogenin. The Injured/LLLT group presented a higher number of regenerating fibers and fewer degenerating fibers (P < 0.05) without changes in the collagen remodeling. In addition, the Injured/LLLT group presented a significant decrease in the expression of TNF-α and myogenin compared to the injured group (P < 0.05). The results suggest that the GaAs laser, using a high final energy after cryoinjury, promotes muscle recovery without changing the collagen remodeling in the muscle extracellular matrix.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arsenicais / Colágeno / Músculo Esquelético / Terapia a Laser / Gálio Limite: Animals Idioma: En Revista: Photochem Photobiol Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arsenicais / Colágeno / Músculo Esquelético / Terapia a Laser / Gálio Limite: Animals Idioma: En Revista: Photochem Photobiol Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos