Improvement of full-thickness rat skin wounds by photobiomodulation therapy (PBMT): A dosimetric study

Autor(es)

de Castro, Juliana Rodrigues ^[1] ; Pereira, Filipi da Silva ^[1] ; Chen, Lin ^[2] ; Arana-Chavez, Victor Elias ^[1] ; Ballester, Rafael Yague ^[1] ; DiPietro, Luisa A. ^[2] ; Simoes, Alyne ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Dent, Dept Biomat & Oral Biol, Lab Oral Biol, BR-05508000 Sao Paulo - Brazil

^[2] Univ Illinois, Coll Dent, Dept Periodont, Ctr Wound Healing & Tissue Regenerat, Chicago, IL - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY; v. 206, MAY 2020.
• Citações Web of Science: 0

Resumo

Basic dosimetric studies are necessary to support the use of photobiomodulation therapy (PBMT), since the great variety of laser parameters that are reported in the literature have created an obstacle to identifying reproducible results. Thus, the present study evaluates the process of tissue repair after the photobiomodulation therapy, taking into consideration the dose, frequency and the mode of energy delivery used. For this, 6 mm diameter wounds were created on dorsal skin of Wistar rats, and the animals were divided in control and irradiated groups, where L1 and L4 (irradiated with 1 point of 10 J/cm(2)), L2 and L5 (5 points of 10 J/cm(2)), L3 and L6 (1 point of 50 J/cm(2)), respectively for one or multiple days of irradiations. A diode laser, lambda 660 nm, 40 mW of power and 0.028 cm(2) of spot area was used. Our data showed that the group receiving multiple treatments over the first week post wounding, applied at 10 J/cm(2) at each of 5 points on and around the wound (group L5) presented the best improvement of wound closure, higher cytokeratin 10, lower macrophage infiltration, and greater tissue resistance to rupture. We conclude that PBMT improves the skin wound healing process, and the outcomes were directly related to the chosen laser parameters and irradiation mode. (AU)

• Processo FAPESP: 16/16332-0 - Papel do microRNA na reparação da pele: efeito da terapia com laser de baixa potência e análise comparativa com a reparação da mucosa oral
• Beneficiário: Alyne Simões Gonçalves
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 14/21214-1 - A terapia com laser em baixa intensidade na biomodulação tecidual no diabetes: mecanismo de ação e dosimetria
• Beneficiário: Alyne Simões Gonçalves
• Modalidade de apoio: Auxílio à Pesquisa - Regular