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Effects of the led therapy on the global DNA methylation and the expression of Dnmt1 and Dnmt3a genes in a rat model of skin wound healing

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Abstract

The use of light emitting diodes (LED) as a therapeutic resource for wound healing has increased over the last years; however, little is still known about the molecular pathways associated to LED exposure. In the present study, we verified the effects of LED therapy on DNA methylation and expression of the DNA methyltransferase (Dnmt) genes, Dnmt1 and Dnmt3a, in an in vivo model of epithelial wound healing. Male Wistar rats were submitted to epithelial excision in the dorsal region and subsequently distributed within the experimental groups: group 1, animals that received irradiation of 0.8 J/cm2 of LED (604 nm); group 2, animals that received 1.6 J/cm2 of LED (604 nm); control (CTL), animals not submitted to therapeutic intervention. LED applications were performed during 7 days, and tissues from the periphery of the wound area were obtained for molecular analysis. The Image-J software was used for analysis of the wound area. DNA methylation was evaluated by ELISA-based method and gene expressions were quantified by real-time PCR. Decrease on global DNA methylation profile was observed in all experimental groups (CTL, 1, and 2) revealing the participation of DNA methylation in the healing process. Significant decrease in the wound area accompanied by increase in the Dnmt3a expression was associated to group 2. Based on our findings, we propose that DNA methylation is an important molecular mechanism associated to wound healing and that irradiation with 1.6 J/cm2 of LED evokes an increase in the expression of the Dnmt3a that might associates to the efficiency of the epithelial wound healing.

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Acknowledgments

This study was funded by the National Foundation for Development of Private Education (FUNADESP - Process N°5300859).

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Authors and Affiliations

  1. Centro de Ciências Biológicas e da Saúde, Universidade Norte do Paraná (UNOPAR), Avenida Paris 675, Jardim Piza, CEP: 86041-140, Londrina, PR, Brasil

    Marcus Vinícius de Matos Gomes, Marcelo Henrique Manfredo, Leandro Vaz Toffoli, Daniellen Christine Castro-Alves, Lucas Magnoni do Nascimento, Wyllian Rafael da Silva, Roberto Kiyoshi Kashimoto & Gelson Marcos Rodrigues-Jr

  2. Centro de Ciências da Saúde, Universidade Estadual de Londrina (UEL), Londrina, Paraná, Brasil

    Rodrigo Antonio Andraus

  3. Departamento de Ciências Fisiológicas, Universidade Estadual de Londrina (UEL), Londrina, Paraná, Brasil

    Viviane Batista Estrada & Gislaine Garcia Pelosi

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  1. Marcus Vinícius de Matos Gomes
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  2. Marcelo Henrique Manfredo
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  3. Leandro Vaz Toffoli
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  4. Daniellen Christine Castro-Alves
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  8. Gelson Marcos Rodrigues-Jr
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  9. Viviane Batista Estrada
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  11. Gislaine Garcia Pelosi
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Correspondence to Marcus Vinícius de Matos Gomes.

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Gomes, M.V.d.M., Manfredo, M.H., Toffoli, L.V. et al. Effects of the led therapy on the global DNA methylation and the expression of Dnmt1 and Dnmt3a genes in a rat model of skin wound healing. Lasers Med Sci 31, 1521–1526 (2016). https://doi.org/10.1007/s10103-016-2007-7

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  • DOI: https://doi.org/10.1007/s10103-016-2007-7

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