Cytokine production after helium-neon laser irradiation in cultures of human peripheral blood mononuclear cells. Journal of photochemistry and photobiology. B, Biology. [J Photochem Photobiol B] Journal article

Title	Cytokine production after helium-neon laser irradiation in cultures of human peripheral blood mononuclear cells.
Author(s)	Funk JO, Kruse A, Kirchner H
Institution	Institute of Immunology and Transfusion Medicine, University of Lübeck Medical School, Germany.
Source	J Photochem Photobiol B 1992 Dec; 16(3-4):347-55.
MeSH	Cell Division Cells, Cultured Cytokines DNA Dose-Response Relationship, Radiation Helium Humans Interferon Type II Interleukin-1 Interleukin-2 Kinetics Lasers Leukocytes, Mononuclear Neon Thymidine Time Factors Tumor Necrosis Factor-alpha
Abstract	The effects of laser light on the immune system have not been extensively characterized. Low-power laser sources, such as the helium-neon (He-Ne) laser with a wavelength of 632.8 nm, have been found to produce photobiological effects with evidence of interference with immunological functions. We have investigated the effects of He-Ne laser irradiation on Ficoll-Hypaque-isolated human peripheral blood mononuclear cells (PBMC). Cultured cells were irradiated for various times at two selected intensities and then stimulated with different mitogens. The rate of incorporation of 3H-thymidine into the DNA of stimulated cells decreased with increasing energy density. The levels of interleukin-1 alpha (IL-1 alpha), interleukin-2 (IL-2), tumour necrosis factor-alpha (TNF-alpha) and interferon-gamma (IFN-gamma) in supernatants of the cultures were determined (irradiated either before or after stimulation). When stimulating cells after irradiation, significantly increased levels of all cytokines were detected after 30 min of irradiation (18.9 J cm-2), whereas after 60 min of irradiation (37.8 J cm-2) cytokine levels were found to be significantly decreased.
Language	eng
Pub Type(s)	Journal Article
PubMed ID	1479476

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