Wavelength-Dependent Effects of Photobiomodulation for Wound Healing in Diabetic Mice
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This study investigated how different LED photobiomodulation (PBM) wavelengths—blue (470 nm), green (540 nm), and red (635 nm)—affected wound healing in diabetic mice with excision wounds. The goal was to compare whether wavelength differences influence healing effectiveness in diabetic wound treatment.
Researchers found that red light and, to a lesser extent, green light significantly improved wound healing, while blue light showed little to no therapeutic benefit. Red and green wavelengths helped reduce wound size and supported faster healing compared with untreated controls.
The study also showed that light absorption and biological effects were wavelength-dependent. Red light penetrated deeper into tissue and improved wound perfusion, while shorter wavelengths like green and blue mainly increased surface temperature. These differences influenced tissue response, circulation, and healing outcomes.
Key takeaway: Pulsed red LED PBM was the most effective for enhancing diabetic wound healing, with green light showing moderate benefits. The findings suggest that wavelength selection is critical when using PBM as a supportive treatment for chronic diabetic wounds.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10054229/