% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Armescu:279884, author = {Armăşescu, Florian and Amuzescu, Bogdan and Gheorghe, Roxana-Olimpia and Ghenghea, Mihail and Ristoiu, Violeta and Ciurea, Jean and Gruia, Ion}, title = {{F}iber-optic-guided near-infrared laser exposure induces depolarization of cultured primary sensory neurons and modifies biophysical properties of human {N}av1.5 channels.}, journal = {Journal of photochemistry and photobiology / B}, volume = {269}, issn = {1011-1344}, address = {New York, NY [u.a.]}, publisher = {Elsevier}, reportid = {DZNE-2025-00851}, pages = {113191}, year = {2025}, abstract = {Photobiomodulation, a therapeutic method promoting wound healing, reduction in inflammation, pain and apoptosis, was widely tested in neurological/psychiatric disorders. In Parkinson's disease positive results have been obtained recently by transcranial or deep-fiber-optic-based near-infrared (NIR) light application. We assessed the effects of NIR stimulation with a 808.5 nm diode laser applied via a multimode fiber with a sharp tip placed over the cell on enzyme-dissociated cultured adult rat primary sensory neurons and human embryo kidney (HEK293) cells stably expressing human voltage-dependent Na+ channels (Nav1.5) approached via patch-clamp. For each type of cell, specific series of voltage- or current-clamp protocols were applied initially and after 3 min of laser exposure or control conditions. Laser exposure induced in neurons a resting potential depolarization (6.6 ± 1.8 mV vs. 2.4 ± 1.8 mV in control, mean ± SEM, p = 0.0594). In Nav1.5-expressing cells, peak INa amplitude slightly increased after laser application (111.2 ± 14.9 $\%$ vs. 70.6 ± 10.4 $\%$ in control experiments), and in outside-out patches the differences were larger (96.64 ± 5.25 $\%-laser$ vs. 37.95 ± 9.14 $\%-control).$ Via chemiluminometry we evidenced a delayed increase in ATP production in laser-exposed HEK293 cells. An explanation of these effects is that NIR exposure facilitates ATP production, maintaining an adequate state of Na+ channels phosphorylation, but we cannot exclude direct polarization effects on macromolecules including ion channels produced by the intense oriented electric field of the laser beam.}, keywords = {Humans / HEK293 Cells / NAV1.5 Voltage-Gated Sodium Channel: metabolism / Infrared Rays / Rats / Animals / Sensory Receptor Cells: radiation effects / Sensory Receptor Cells: metabolism / Sensory Receptor Cells: cytology / Lasers / Cells, Cultured / Patch-Clamp Techniques / Membrane Potentials: radiation effects / NIR laser (Other) / Nav1.5 (Other) / Patch-clamp (Other) / Phosphorylation (Other) / Photobiomodulation (Other) / Primary sensory neuron (Other) / NAV1.5 Voltage-Gated Sodium Channel (NLM Chemicals) / SCN5A protein, human (NLM Chemicals)}, cin = {AG Dityatev}, ddc = {540}, cid = {I:(DE-2719)1310007}, pnm = {351 - Brain Function (POF4-351)}, pid = {G:(DE-HGF)POF4-351}, typ = {PUB:(DE-HGF)16}, pubmed = {pmid:40460513}, doi = {10.1016/j.jphotobiol.2025.113191}, url = {https://pub.dzne.de/record/279884}, }