Abstract
Herein, we attempted to evaluate the therapeutic potential of photobiomodulation (PBM) and curcumin-loaded iron nanoparticles (CUR), alone and in combination, on wound closure rate (WCR), microbial flora by measuring colony-forming units (CFUs), the stereological and biomechanical properties of repairing wounds in the maturation stage of the wound healing course in an ischemic infected delayed healing wound model (IIDHWM) of type I diabetic (TIDM) rats. There were four groups: group 1 was the control, group 2 received CUR, rats in group 3 were exposed to PBM (80 Hz, 890 nm, and 0.2 J/cm2), and rats in group 4 received both PBM and CUR (PBM + CUR). We found CFU was decreased in groups 2, 3, and 4 compared to group 1 (p = 0.000 for all). Groups 2, 3, and 4 showed a considerable escalation in WCR compared to group 1 (p = 0.000 for all). In terms of wound strength parameters, substantial increases in bending stiffness and high-stress load were observed in groups 2, 3, and 4 compared to group 1 (p = 0.000 for all). Stereological examinations revealed decreases in neutrophil and macrophage counts and increases in fibroblast counts in groups 2, 3, and 4compared to group 1 (p = 0.000 for all). Blood vessel counts were more dominant in the PBM and PBM + CUR groups over group 1 (p = 0.000 for all). CFU and wound strength as well as macrophage, neutrophil, and fibroblast counts were found to be improved in the PBM + CUR and PBM groups compared to the CUR group (ranging from p = 0.000 to p < 0.05). Better results were achieved in the PBM + CUR treatment over the PBM therapy. We determined therapy with PBM + CUR, PBM alone, and CUR alone substantially accelerated diabetic wound healing in an IIDHWM of TIDM rats compared to control group. Concomitantly, the PBM + CUR and PBM groups attained significantly enhanced results for WCR, stereological parameters, and wound strength than the CUR group, with the PBM + CUR results being superior to those of the PBM group.
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Statistical analysis of our work was available as a supplementary file.
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Our research was economically supported by the Research Department of the medical faculty at SBMU (Grant No.: 30491, (IR.SBMU.MSP.REC.1400. 675,). This article was extracted from the thesis (IR.SBMU.AEC.1401.034) written by Mr. Hamidreza Omidi.
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MB wrote the manuscript. HO, KS, AM, HA, MM, FG, MA, and FR performed the experiments. AA, FF, LG, and SC added their comments. AM completed the statistical methods. All authors approved the manuscript.
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This investigation was permitted by the Clinical Morals office of SBMU (IR.SBMU.MSP.REC.1400. 675, and IR.SBMU.AEC.1401.034).
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Omidi, H., Sohrabi, K., Amini, A. et al. Application of combined photobiomodulation and curcumin-loaded iron oxide nanoparticles considerably enhanced repair in an infected, delayed-repair wound model in diabetic rats compared to either treatment alone. Photochem Photobiol Sci 22, 1791–1807 (2023). https://doi.org/10.1007/s43630-023-00411-7
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DOI: https://doi.org/10.1007/s43630-023-00411-7