TY - JOUR
T1 - Photobiomodulation improves cutaneous wound healing in an animal model of type II diabetes
AU - Byrnes, Kimberly R.
AU - Barna, Lauren
AU - Chenault, Michelle
AU - Waynant, Ronald W.
AU - Ilev, Ilko K.
AU - Longo, Leonardo
AU - Miracco, Clelia
AU - Johnson, Bryan
AU - Anders, Juanita J.
PY - 2004/8
Y1 - 2004/8
N2 - Objective: We investigated the effects of photobiomodulation (PBM) on cutaneous wound healing in an animal model of type II diabetes, Psammomys obesus (Sand Rats). Background Data: 632-nm light has been established as the most effective wavelength for treatment of cutaneous wounds; however, the inconsistent efficacy of PBM may be due to inadequate treatment parameter selection. Methods: Using 632-nm light, an initial series of experiments were done to establish optimal treatment parameters for this model. Following creation of bilateral full-thickness skin wounds, non-diabetic Sand Rats were treated with PBM of differing dosages. Wound healing was assessed according to wound closure and histological characteristics of healing. Optimal treatment parameters were then used to treat type II diabetic Sand Rats while a diabetic control group received no irradiation. In order to elucidate the mechanism behind an improvement in wound healing, expression of basic fibroblast growth factor (bFGF) was assessed. Results: Significant improvement in wound healing histology and wound closure were found following treatment with 4 J/cm 2 (16 mW, 250-sec treatments for 4 consecutive days; p < 0.05). The 4 J/cm2 dosage significantly improved histology and closure of wounds in the diabetic group in comparison to the non-irradiated diabetic group. Quantitative analysis of bFGF expression at 36 h post-injury revealed a threefold increase in the diabetic and non-diabetic Sand Rats after PBM. Conclusions: The results demonstrate that PBM at an energy density of 4 J/cm2 is effective in improving the healing of cutaneous wounds in an animal model of type II diabetes, suggesting that PBM (632 nm, 4 J/cm 2) would be effective in treating chronic cutaneous wounds in diabetic patients.
AB - Objective: We investigated the effects of photobiomodulation (PBM) on cutaneous wound healing in an animal model of type II diabetes, Psammomys obesus (Sand Rats). Background Data: 632-nm light has been established as the most effective wavelength for treatment of cutaneous wounds; however, the inconsistent efficacy of PBM may be due to inadequate treatment parameter selection. Methods: Using 632-nm light, an initial series of experiments were done to establish optimal treatment parameters for this model. Following creation of bilateral full-thickness skin wounds, non-diabetic Sand Rats were treated with PBM of differing dosages. Wound healing was assessed according to wound closure and histological characteristics of healing. Optimal treatment parameters were then used to treat type II diabetic Sand Rats while a diabetic control group received no irradiation. In order to elucidate the mechanism behind an improvement in wound healing, expression of basic fibroblast growth factor (bFGF) was assessed. Results: Significant improvement in wound healing histology and wound closure were found following treatment with 4 J/cm 2 (16 mW, 250-sec treatments for 4 consecutive days; p < 0.05). The 4 J/cm2 dosage significantly improved histology and closure of wounds in the diabetic group in comparison to the non-irradiated diabetic group. Quantitative analysis of bFGF expression at 36 h post-injury revealed a threefold increase in the diabetic and non-diabetic Sand Rats after PBM. Conclusions: The results demonstrate that PBM at an energy density of 4 J/cm2 is effective in improving the healing of cutaneous wounds in an animal model of type II diabetes, suggesting that PBM (632 nm, 4 J/cm 2) would be effective in treating chronic cutaneous wounds in diabetic patients.
UR - http://www.scopus.com/inward/record.url?scp=4444349267&partnerID=8YFLogxK
U2 - 10.1089/pho.2004.22.281
DO - 10.1089/pho.2004.22.281
M3 - Article
C2 - 15345169
AN - SCOPUS:4444349267
SN - 1549-5418
VL - 22
SP - 281
EP - 290
JO - Photomedicine and Laser Surgery
JF - Photomedicine and Laser Surgery
IS - 4
ER -