OBJECTIVE AND BACKGROUND DATA: Polarized light has already been experimentally and clinically used in an effort to promote wound healing, but the findings have been equivocal. The aim of this study was to evaluate the effect of visible and infrared polarized light of a specific range of wavelength (580-3400 nm) on the secondary healing of full-thickness skin wounds in rats. MATERIALS AND METHODS: Forty male Wistar rats were used, divided in two groups of 20 animals each. A standardized open full-thickness skin wound was created on the back of each animal. In the first group the rats were exposed to polarized light (40 mW/cm(2) and 2.4 J/cm(2)) for 7 min on a daily basis (total daily dose = 16.8 J/cm(2)), while the second group acted as controls. Clinical and histological evaluation of wound healing were performed on days 5, 10, 15, and 20 post-wound. The size of the wounds was measured with the use of planimetry, whereas epithelialization, inflammatory response, neovascularization, and collagen formation were histologically assessed. RESULTS: According to our findings, the group exposed to light therapy showed statistically significantly faster epithelialization seen on days 10 and 15 post-wound compared to controls, as well as better quality of the healing process (although not statistically significantly) at all time points. CONCLUSION: In conclusion, this specific fraction of polarized light seems to have beneficial effects on wound healing, leading to faster epithelialization and qualitatively better wound healing.
OBJECTIVE AND BACKGROUND DATA: Polarized light has already been experimentally and clinically used in an effort to promote wound healing, but the findings have been equivocal. The aim of this study was to evaluate the effect of visible and infrared polarized light of a specific range of wavelength (580-3400 nm) on the secondary healing of full-thickness skin wounds in rats. MATERIALS AND METHODS: Forty male Wistar rats were used, divided in two groups of 20 animals each. A standardized open full-thickness skin wound was created on the back of each animal. In the first group the rats were exposed to polarized light (40 mW/cm(2) and 2.4 J/cm(2)) for 7 min on a daily basis (total daily dose = 16.8 J/cm(2)), while the second group acted as controls. Clinical and histological evaluation of wound healing were performed on days 5, 10, 15, and 20 post-wound. The size of the wounds was measured with the use of planimetry, whereas epithelialization, inflammatory response, neovascularization, and collagen formation were histologically assessed. RESULTS: According to our findings, the group exposed to light therapy showed statistically significantly faster epithelialization seen on days 10 and 15 post-wound compared to controls, as well as better quality of the healing process (although not statistically significantly) at all time points. CONCLUSION: In conclusion, this specific fraction of polarized light seems to have beneficial effects on wound healing, leading to faster epithelialization and qualitatively better wound healing.
Authors: Renata Tupinambá Branquinho; Carlos Geraldo Campos de Mello; Maykon Tavares Oliveira; Levi Eduardo Soares Reis; Paula Mello de Abreu Vieira; Dênia Antunes Saúde-Guimarães; Vanessa Carla Furtado Mosqueira; Marta de Lana Journal: Antimicrob Agents Chemother Date: 2020-03-24 Impact factor: 5.191
Authors: Jack Feehan; Nicholas Tripodi; Sarah Fraser; Kathleen Mikkelsen; April Thewlis; Dimitrios Kiatos; Maja Husaric; Vasso Apostolopoulos Journal: J Biophotonics Date: 2019-12-29 Impact factor: 3.207
Authors: Lilla Knels; Monika Valtink; Jamlec De la Vega Marin; Gerald Steiner; Cora Roehlecke; Alexander Krueger; Richard H W Funk Journal: Oxid Med Cell Longev Date: 2012-10-17 Impact factor: 6.543
Authors: Eleonora Lima Alves Cunha; Fernanda Karoline Vieira da Silva Torchelsen; Lucas Maciel Cunha; Maykon Tavares Oliveira; Levi Eduardo Soares Reis; Kátia da Silva Fonseca; Paula Melo Abreu Vieira; Cláudia Martins Carneiro; Marta Lana Journal: MethodsX Date: 2019-10-21