The effects of supernatants following irradiation of lymphocytes and monocytes with a semiconductor laser, on monocyte chemotaxis were investigated in vitro. Human peripheral lymphocytes and monocytes were obtained from healthy adult donors, and were suspended in medium, following laser irradiation. The laser irradiation (wavelength 900 nm, output power 1.5 mW) was carried out in the pulse wave mode at doses of 0.1 J cm-2 in total. After irradiation, the lymphocytes and monocytes were incubated with or without several kinds of stimulants for varying time periods. The supernatants of these cultures were then assayed for human monocyte chemotaxis. Through these experiments, we were unable to detect any significant levels of stimulative or depressive effects due to laser irradiation of the lymphocytes and monocytes, on the production of monocyte chemotactic activity.
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Yamaguchi, N., Tsukamoto, Y. The in vitro effects of semiconductor laser irradiation on inflammation: laser irradiation did not affect monocyte infiltration. J Mater Sci: Mater Med 5, 511–515 (1994). https://doi.org/10.1007/BF00124882
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DOI: https://doi.org/10.1007/BF00124882