near-infrared photothermal stimulation shifts immune cells from infection-fighting to tissue-repair mode
Near-infrared (NIR) photothermal stimulation of a Ppy/PVA/PEG/HA hybrid hydrogel rapidly cleared infection via early M1 macrophage activation followed by M2 transition and accelerated tissue repair in diabetic wound models.
What this means for you
Your immune system has two key gears: one that fights infection and one that rebuilds tissue. Near-infrared light appears to help activate both in sequence — first clearing harmful bacteria, then signaling the body to shift into repair and recovery. This kind of coordinated immune response is central to how wounds close and skin regenerates.
The published research
Immunomodulatory Tissue‐Engineering Strategies for Diabetic Foot Ulcer Management: A Systematic Review
Wound Repair and Regeneration · 2026
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