Introduction: Several studies have shown the role of oxidative stress in pathophysiology of burn injuries. This study aimed to evaluate the changes of oxidant-antioxidant levels during the week following burn injuries and its correlation with grade of burn.
Methods: In this prospective cross-sectional study, changes of total glutathione, reduced glutathione (GSH), oxidized GSH (GSSG), GSH/GSSG ratio, as well as Pro-oxidant-antioxidant balance (PAB) were investigated on the 1st, 2nd and 7th days of admission in patients with > 15 % burns.
Results: 40 patients with the mean age of 21.1 ± 14.5 were studied (47.5% male). More than 50% of patients were in the 18 – 55 years age range and over 70% had 20% – 60% grade of burn. Total serum glutathione level and GSH had significant decreasing trends (P < 0.001) and GSSG and GSH/GSSG ratio had increasing trends (p < 0.001). No significant correlation was observed between serum GSH level and the total body surface area (TBSA) of burn injury (r = 0.047; p = 0.779). The evaluation of PAB and its correlation with TBSA showed a significant and direct association between them on the 1st (coefficient = 0.516; p = 0.001), 2nd (coefficient = 0.62; p <0.001), and 3rd (coefficient = 0.471; p = 0.002) day of follow up.
Conclusion: According to this study, the redox perturbation occurred in burn injury which was measured and proved by decreased GSH/GSSG ratio as well as the shift of PAB in favour of oxidants. Besides, since PAB positively correlated with the severity of dermal damage, it might suggest the application of antioxidants as a part of therapeutic protocol for which the dosage should be proportionate to the surface area of the damaged skin.
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