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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low-Level Laser Therapy (LLLT) in Dystrophin-Deficient Muscle Cells: Effects on Regeneration Capacity, Inflammation Response and Oxidative Stress

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Macedo, Aline Barbosa [1] ; Rapucci Moraes, Luis Henrique [1] ; Mizobuti, Daniela Sayuri [1] ; Fogaca, Aline Reis [1] ; Rapucci Moraes, Fernanda dos Santos [1] ; Hermes, Tulio de Almeida [1] ; Pertille, Adriana [2] ; Minatel, Elaine [1]
Total Authors: 8
[1] Univ Estadual Campinas UNICAMP, Inst Biol, Dept Biol Estrut & Func, Campinas, SP - Brazil
[2] Univ Metodista Piracicaba UNIMEP, Grad Program Sci Human Movement, Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: PLoS One; v. 10, n. 6 JUN 17 2015.
Web of Science Citations: 9

The present study evaluated low-level laser therapy (LLLT) effects on some physiological pathways that may lead to muscle damage or regeneration capacity in dystrophin-deficient muscle cells of mdx mice, the experimental model of Duchenne muscular dystrophy (DMD). Primary cultures of mdx skeletal muscle cells were irradiated only one time with laser and analyzed after 24 and 48 hours. The LLLT parameter used was 830 nm wavelengths at 5 J/cm(2) fluence. The following groups were set up: Ctrl (untreated C57BL/10 primary muscle cells), mdx (untreated mdx primary muscle cells), mdx LA 24 (mdx primary muscle cells - LLLT irradiated and analyzed after 24 h), and mdx LA 48 (mdx primary muscle cells - LLLT irradiated and analyzed after 48 h). The mdx LA 24 and mdx LA 48 groups showed significant increase in cell proliferation, higher diameter in muscle cells and decreased MyoD levels compared to the mdx group. The mdx LA 48 group showed significant increase in Myosin Heavy Chain levels compared to the untreated mdx and mdx LA 24 groups. The mdx LA 24 and mdx LA 48 groups showed significant increase in {[}Ca2+]i. The mdx group showed significant increase in H2O2 production and 4-HNE levels compared to the Ctrl group and LLLT treatment reduced this increase. GSH levels and GPx, GR and SOD activities increased in the mdx group. Laser treatment reduced the GSH levels and GR and SOD activities in dystrophic muscle cells. The mdx group showed significant increase in the TNF-alpha and NF-kappa B levels, which in turn was reduced by the LLLT treatment. Together, these results suggest that the laser treatment improved regenerative capacity and decreased inflammatory response and oxidative stress in dystrophic muscle cells, indicating that LLLT could be a helpful alternative therapy to be associated with other treatment for dystrophinopathies. (AU)

FAPESP's process: 11/02474-4 - Treatment in vivo and in vitro with calcium blocker and antioxidant in mdx mice
Grantee:Elaine Minatel
Support Opportunities: Regular Research Grants
FAPESP's process: 13/17299-9 - Effect of the combination of anti-inflammatory and antioxidant on dystrophic muscle cells
Grantee:Aline Reis Fogaça
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 10/01087-4 - In vivo and in vitro treatment, with N-acetylcistein and Deferoxamin in dystrophic mouse
Grantee:Luis Henrique Rapucci Moraes
Support Opportunities: Scholarships in Brazil - Doctorate