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Role of 904 nm superpulsed laser‐mediated photobiomodulation on nitroxidative stress and redox homeostasis in burn wound healing
Author(s) -
Yadav Anju,
Verma Saurabh,
Keshri Gaurav K.,
Gupta Asheesh
Publication year - 2020
Publication title -
photodermatology, photoimmunology and photomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.736
H-Index - 60
eISSN - 1600-0781
pISSN - 0905-4383
DOI - 10.1111/phpp.12538
Subject(s) - oxidative stress , chemistry , wound healing , nitric oxide , glutathione , inflammation , burn injury , catalase , reactive oxygen species , antioxidant , homeostasis , lipid peroxidation , protein carbonylation , pharmacology , biochemistry , immunology , medicine , surgery , enzyme , organic chemistry
Background Burn wound healing is delayed due to several critical factors such as sustained inflammation, vascular disorder, neuropathy, enhanced proteolysis, infection, and oxidative stress. Burn wounds have limited oxygen supply owing to compromised blood circulation. Hypoxic burn milieu leads to free radicals overproduction incurring oxidative injury, which impedes repair process causing damage to cell membranes, proteins, lipids, and DNA. Photobiomodulation (PBM) with 904 nm superpulsed laser had shown potent healing efficacy via attenuating inflammation while enhancing proliferation, angiogenesis, collagen accumulation, and bioenergetic activation in burn wounds. Methods This study investigated the effects of 904 nm superpulsed laser at 0.4 mW/cm 2 average power density, 0.2 J/cm 2 total energy density, 100 Hz frequency, and 200 ns pulse width for 10 min daily for seven days postburn injury on nitroxidative stress, endogenous antioxidants status, and redox homeostasis. Results Photobiomodulation treatment significantly decreased reactive oxygen species, nitric oxide, and lipid peroxidation levels as compared to non‐irradiated control. Further, protective action of PBM against protein oxidative damage was evidenced by reduced protein carbonylation and advanced oxidation protein product levels along with significantly enhanced endogenous antioxidants levels of SOD, catalase, GPx, GST, reduced glutathione, and thiol (T‐SH, Np‐SH, P‐SH). Biochemical changes aid in reduction of oxidative stress and maintenance of redox homeostasis, which further well corroborated by significantly up‐regulated protein expression of Nrf 2, hemeoxygenase (HO‐1), and thioredoxin reductase 2 (Txnrd2). Conclusion Photobiomodulation with 904 nm superpulsed laser led to reduction of nitroxidative stress, induction of endogenous antioxidants, and maintenance of redox homeostasis that could play a vital role in augmentation of burn wound healing.