Irradiation at 660 nm modulates different genes central to wound healing in wounded and diabetic wounded cell models

Nicolette N. Houreld

doi:10.1117/12.2041430

18 February 2014 Irradiation at 660 nm modulates different genes central to wound healing in wounded and diabetic wounded cell models

Nicolette N. Houreld

Author Affiliations +

Proceedings Volume 8932, Mechanisms for Low-Light Therapy IX; 89320A (2014) https://doi.org/10.1117/12.2041430
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Wound healing is a highly orchestrated process and involves a wide variety of cellular components, chemokines and growth factors. Laser irradiation has influenced gene expression and release of various growth factors, cytokines and extracellular matrix proteins involved in wound healing. This study aimed to determine the expression profile of genes involved in wound healing in wounded and diabetic wounded fibroblast cells in response to irradiation at a wavelength of 660 nm. Human skin fibroblast cells (WS1) were irradiated with a diode laser (wavelength 660 nm; fluence 5 J/cm²; power output 100 mW; power density 11 mW/cm²; spot size 9.1 cm²; exposure duration 7 min 35 s). Total RNA was isolated and 1 μg reverse transcribed into cDNA which was used as a template in real-time qualitative polymerase chain reaction (qPCR). Eighty four genes involved in wound healing (extracellular matrix and cell adhesion; inflammatory cytokines and chemokines; growth factors; and signal transduction) were evaluated in wounded and diabetic wounded cell models. Forty eight hours post-irradiation, 6 genes were significantly upregulated and 8 genes were down-regulated in irradiated wounded cells, whereas 1 gene was up-regulated and 33 genes down-regulated in irradiated diabetic wounded cells. Irradiation of stressed fibroblast cells to a wavelength of 660 nm and a fluence of 5 J/cm² modulated the expression of different genes involved in wound healing in different cell models. Modulation of these genes leads to the effects of laser irradiation seen both in vivo and in vitro, and facilitates the wound healing process.

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Nicolette N. Houreld "Irradiation at 660 nm modulates different genes central to wound healing in wounded and diabetic wounded cell models", Proc. SPIE 8932, Mechanisms for Low-Light Therapy IX, 89320A (18 February 2014); https://doi.org/10.1117/12.2041430

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KEYWORDS

Wound healing

Collagen

Tissues

Modulation

In vitro testing

Laser irradiation

Proteins

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