Inhibition of fibroblast proliferation in vitro using red light-emitting diodes.

Red light is part of the visible light spectrum. The effects of light-emitting diode (LED)-generated red light on human skin are not well-characterized. To study the effect of red LED-generated low-level light therapy (LLLT) on fibroblast proliferation and viability in vitro. Irradiation of normal human skin fibroblasts using red LED panels was performed in vitro, and modulation of proliferation and viability was quantified using trypan blue dye exclusion assay. Statistically significant decreases in cell proliferation were noted at the following fluences (time): 160 J/cm2 (30 minutes, 34 seconds), 320 J/cm2 (61 minutes, 07 seconds) and 640 J/cm2 (122 minutes, 14 seconds) (Figure 1). Irradiation at the 160- (98.5 ± 1.2%) and 320-J/cm2 (98.0 ± 3.1%) doses did not significantly alter viability. At certain fluences, red LLLT can effectively inhibit fibroblast proliferation in vitro without altering viability and holds promise for the treatment of scars and other proliferative skin diseases. © 2013 by the American Society for Dermatologic Surgery, Inc. Published by Wiley Periodicals, Inc.

Citation

Hadar Lev-Tov, Andrew Mamalis, Neil Brody, Daniel Siegel, Jared Jagdeo. Inhibition of fibroblast proliferation in vitro using red light-emitting diodes. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]. 2013 Aug;39(8):1167-70

PMID: 23590233

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