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Published in: Lasers in Medical Science 9/2019

01-12-2019 | Cytokines | Review Article

Photobiomodulation effects on keratinocytes cultured in vitro: a critical review

Authors: Priscila Thaís Rodrigues de Abreu, José Alcides Almeida de Arruda, Ricardo Alves Mesquita, Lucas Guimarães Abreu, Ivana Márcia Alves Diniz, Tarcília Aparecida Silva

Published in: Lasers in Medical Science | Issue 9/2019

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Abstract

Photobiomodulation therapy (PBMT) has been widely used for the promotion of tissue repair. Despite these therapeutic benefits, in some cases, PBMT appears to be unsuccessful, and the strongest hypothesis is that this failure is due to inadequate light dosimetry and wavelengths. The objective of the present critical review was to evaluate the effects of PBMT on cultured keratinocytes using blue, red, or near-infrared light categorized into arbitrary ranges of energy density (0.1–5.0, 5.1–10.0, 10.1–15.0, and over 15.0 J/cm2). The electronic searches were conducted in PubMed, Web of Science, Scopus and LILACS databases, and included LASER or LED devices. A total of 55 articles evaluating the effects of PBMT on cell viability, proliferation, migration, and cytokine and growth factor production were included. Overall, the studies failed to provide detailed information about light dosimetry or detailed experimental conditions. The vast majority of the energy densities tested produced unmodified results regardless of the wavelength applied. However, it was possible to observe that red and near-infrared light had more stimulatory effects than blue light. In addition, for all parameters analyzed, favorable outcomes were mostly obtained in the range of 0.1–5.0 J/cm2. The less explored energy densities were within the 10.1–15.0 J/cm2 range. Energy densities above 15.0 J/cm2 were ineffective or tended to cause cell death. The heterogeneity of the data does not allow us to define a PBMT range setting protocol that would have beneficial effects on keratinocytes.
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Metadata
Title
Photobiomodulation effects on keratinocytes cultured in vitro: a critical review
Authors
Priscila Thaís Rodrigues de Abreu
José Alcides Almeida de Arruda
Ricardo Alves Mesquita
Lucas Guimarães Abreu
Ivana Márcia Alves Diniz
Tarcília Aparecida Silva
Publication date
01-12-2019
Publisher
Springer London
Published in
Lasers in Medical Science / Issue 9/2019
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-019-02813-5

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