670 nm photobiomodulation improves the mitochondrial redox state of diabetic wounds
| Autor: | Betsy Abroe, Farnaz H. Foomani, Soudeh Mostaghimi, Shima Mehrvar, Mahsa Ranji, Sandeep Gopalakrishnan, Janis T. Eells |
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| Rok vydání: | 2021 |
| Předmět: |
Flavin adenine dinucleotide
Bioenergetics integumentary system business.industry Mitochondrial redox Diabetic mouse 010501 environmental sciences Pharmacology Nicotinamide adenine dinucleotide medicine.disease_cause 01 natural sciences chemistry.chemical_compound chemistry In vivo fluorescence medicine Radiology Nuclear Medicine and imaging Original Article Wound healing business Oxidative stress 0105 earth and related environmental sciences |
| Zdroj: | Quant Imaging Med Surg |
| ISSN: | 2223-4292 |
| Popis: | BACKGROUND: Photobiomodulation (PBM) by far-red (FR) to near-infrared (NIR) light has been demonstrated to accelerate diabetic wound healing in preclinical and clinical studies. Mitochondrial dysfunction and oxidative stress play key roles in impaired diabetic wound healing, and the effect of PBM on the metabolic state of diabetic wounds remains to be elucidated. METHODS: In this study, a custom-designed in vivo fluorescence imaging technique was used to quantitatively assess the effect of FR-PBM on the mitochondrial bioenergetics of diabetic wounds. The intrinsic fluorescence of two mitochondrial co-enzymes, nicotinamide adenine dinucleotide (NADH) and oxidized flavin adenine dinucleotide (FAD), was monitored to quantify the redox ratio (RR) (NADH/FAD) of wounds over time. RESULTS: Using an excisional model of wound healing, we demonstrated that 670 nm (FR) PBM improved mitochondrial bioenergetics and stimulated the rate of wound healing in diabetic db/db mice. Wound closure and the RR of diabetic wounds in response to 670 nm PBM (4.5 J/cm(2), 60 mW/cm(2) for 90 s per day, 5 days/week) were compared to the sham-treated group. At day 9 of post-wounding, we observed a 43% decrease in the wound area and a 75% increase in RR in FR-treated diabetic mice compared to sham-treated diabetic mice. CONCLUSIONS: We conclude that the increase in mitochondrial RR and the related decrease in oxidative stress may be an important factor in FR-PBM mediated acceleration of wound healing in diabetic mice. |
| Databáze: | OpenAIRE |
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