Mechanisms of action and clinical research progress of photobiomodulation.
Level 5 - mechanism / opinion, no new human data
Narrative review of biological mechanisms and clinical progress without systematic review methodology or new data.
PubMed 42497681 · doi:10.1016/j.jphotobiol.2026.113529
What was done
This narrative review summarizes the molecular mechanisms and research status of photobiomodulation (PBM; low-intensity visible or near-infrared light at 600–1100 nm). The authors synthesized mechanistic pathways (mitochondrial cytochrome c oxidase activation, ATP synthesis, reactive oxygen species signaling, PI3K/Akt, MAPK, and NF-κB) across five functional areas: tissue repair and regeneration, anti-inflammatory and immunomodulatory effects, glucose and lipid metabolism regulation, tumor intervention, and neuroprotection and analgesia.
What was found
The abstract provides a qualitative overview and reports no quantitative data, effect sizes, or study counts. It notes that photobiomodulation demonstrates wavelength- and dose-dependent bidirectional regulatory effects and identifies parameter variability as a primary driver of clinical efficacy uncertainty.
Why it matters
It provides a multisystem conceptual summary of photobiomodulation mechanisms to help guide standardized protocol design for adjunctive non-invasive light therapy.
Limits
The paper is a narrative overview without primary clinical or laboratory data. No systematic search criteria, meta-analytic pooling, or sample sizes are reported in the abstract, and therapeutic efficacy remains variable due to unstandardized treatment parameters.
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