Abstract
We report the results of our investigations on the effect of antimicrobial photodynamic therapy (APDT) on angiogenesis in wounds of diabetic mice. For this, measurements were made on levels of nitric oxide (NO), vascular endothelial growth factor-A (VEGF-A), and markers of proinflammatory stress (phosphorylated nuclear factor kappa B and p38 mitogen-activated protein kinase) on day 3 post-wounding. For uninfected and infected wounds, the levels of NO, VEGF-A were lower and the levels of phospho-NF-kB-p65, phospho-p38MAPK were higher in diabetic mice compared with that in nondiabetic mice. For infected wounds, multiple APDT (fluence ~60 J/cm2) led to increase in NO, VEGF-A levels and a decrease in the phospho-NF-kB-p65, phospho-p38MAPK. Further, compared with aminoguanidine, and silver nitrate, multiple APDT was observed to result in a much improved proangiogenic response.
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Acknowledgment
The authors acknowledge help of Shri Anupam Chowdhury in establishment of wound infection and biochemical measurements.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethics statement
All the experimental procedures involving animals were approved by the Institutional Animal Ethics Committee, in accordance with the guidelines of the Committee for Purpose of Care and Supervision of Experimental Animals (CPCSEA), Department of Environment and Forests, Government of India. The animals were housed individually in cages with free access to food and water and maintained on a 12-h light/dark cycle at 22 °C (±2 °C). All the animal manipulations involving wounds were carried out in anesthetized conditions, and animals were kept on warm cotton pads for recovery from anesthesia. Animals were euthanized by cervical dislocation. All research animals were treated humanely, and all efforts were made to minimize the animal suffering and the number of animals killed.
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Sahu, K., Sharma, M., Dube, A. et al. Topical antimicrobial photodynamic therapy improves angiogenesis in wounds of diabetic mice. Lasers Med Sci 30, 1923–1929 (2015). https://doi.org/10.1007/s10103-015-1784-8
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DOI: https://doi.org/10.1007/s10103-015-1784-8