Photobiomodulation of distinct lineages of human dermal fibroblasts: a rational approach towards the selection of effective light parameters for skin rejuvenation and wound healing

Charles Mignon; Natallia E. Uzunbajakava; Bianca Raafs; Mitchel Moolenaar; Natalia V. Botchkareva; Desmond J. Tobin

doi:10.1117/12.2208574

8 March 2016 Photobiomodulation of distinct lineages of human dermal fibroblasts: a rational approach towards the selection of effective light parameters for skin rejuvenation and wound healing

Charles Mignon, Natallia E. Uzunbajakava, Bianca Raafs, Mitchel Moolenaar, Natalia V. Botchkareva, Desmond J. Tobin

Author Affiliations +

Proceedings Volume 9695, Mechanisms of Photobiomodulation Therapy XI; 969508 (2016) https://doi.org/10.1117/12.2208574
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

Distinct lineages of human dermal fibroblasts play complementary roles in skin rejuvenation and wound healing, which makes them a target of phototherapy. However, knowledge about differential responses of specific cell lineages to different light parameters and moreover the actual molecular targets remain to be unravelled. The goal of this study was to investigate the impact of a range of parameters of light on the metabolic activity, collagen production, and cell migration of distinct lineages of human dermal fibroblasts. A rational approach was used to identify parameters with high therapeutic potential. Fibroblasts exhibited both inhibitory and cytotoxic change when exposed to a high dose of blue and cyan light in tissue culture medium containing photo-reactive species, but were stimulated by high dose red and near infrared light. Cytotoxic effects were eliminated by refreshing the medium after light exposure by removing potential ROS formed by extracellular photo-reactive species. Importantly, distinct lineages of fibroblasts demonstrated opposite responses to low dose blue light treatment when refreshing the medium after exposure. Low dose blue light treatment also significantly increased collagen production by papillary fibroblasts; high dose significantly retarded closure of the scratch wound without signs of cytotoxicity, and this is likely to have involved effects on both cell migration and proliferation. We recommend careful selection of fibroblast subpopulations and their culture conditions, a systematic approach in choosing and translating treatment parameters, and pursuit of fundamental research on identification of photoreceptors and triggered molecular pathways, while seeking effective parameters to address different stages of skin rejuvenation and wound healing.

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Charles Mignon, Natallia E. Uzunbajakava, Bianca Raafs, Mitchel Moolenaar, Natalia V. Botchkareva, and Desmond J. Tobin "Photobiomodulation of distinct lineages of human dermal fibroblasts: a rational approach towards the selection of effective light parameters for skin rejuvenation and wound healing", Proc. SPIE 9695, Mechanisms of Photobiomodulation Therapy XI, 969508 (8 March 2016); https://doi.org/10.1117/12.2208574

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