Effects of amber LED on inflammatory and regulatory monocytes and lymphocytes
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY(2024)
摘要
The primary objective of the present study was to assess the impact of amber LED photobiomodulation (PBM) on human monocytes and lymphocytes that were polarized into proinflammatory and regulatory/reparative phenotypes. Human leukocytes were polarized with LPS or LPS + IL -4 for 2 h and irradiated after 2 and 6 h with amber LED (590 nm). Cell absorbance spectrum and gene and protein expression of IL-1 beta, IL -6, IL -10, IL -17, TNF alpha and IFN gamma determined after 24 h. The results showed that irradiation did not significantly alter absorbance of non -polarized monocytes, whereas irradiated polarized monocytes presented reduction in absorbance in 625850 nm region. Irradiated monocytes polarized with LPS + IL -4 presented reduction in absorbance in 600-725 nm region compared to non -irradiated group. Irradiated non -polarized lymphocytes presented absorbance peaks between 650 and 820 nm not seen in non -irradiated group. No difference was found in absorbance pattern of polarized lymphocytes after irradiation. Irradiation led to reduction in protein synthesis of IL -6 and TNF alpha in monocytes polarized to proinflammatory phenotype and increase in production of IL -17 in lymphocytes. Irradiation reduced production of IL -10 in monocytes and lymphocytes polarized to immunoregulatory phenotype. In conclusion, amber LED modulates light absorbance and expression of important cytokines in inflammatory/ repair processes in monocytes and lymphocytes.
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关键词
Leukocytes,Photobiomodulation,LED,Amber,Optical absorbance
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