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- W2416188414 abstract "Anti-inflammatory, immunomodulating and wound-healing effects of visible and infrared (IR) radiation from laser and non-laser sources are widely used in current medicine. However, the role of pro- and anti-inflammatory cytokines in development of these effects has been poorly studied. A randomized, placebo-controlled, double blind study was made. Using ELISA, the content of 10 cytokines was studied in the peripheral blood of volunteers after a single and four daily irradiations of the sacral area (D = 15 cm) with polychromatic visible + IR polarized light (480-3400 nm, 12 J/cm2). The phototherapeutic sessions were accompanied by four blood exfusions for the study (to a total volume of 80 ml). In the control (placebo) group, irradiation was imitated, and blood samples of the same volume were drawn at the same time intervals as in volunteers of the main group. A fast decrease in the level of pro-inflammatory cytokines was revealed as soon as in 0.5 h after the irradiation. This level was retained until the end of the phototherapeutic course. At the parameters exceeding the norm, the contents of TNF-alpha, IL-6 and IFN-gamma fell, on average, by 34, 12 and 1.5 times, respectively. By the end of the course, the levels of IFN-gamma and of IL-12 decreased by 5 and 15 times, respectively. A fast decrease (by two-fold) was also characteristic of normal values of IL-6. Neither IL-1beta, nor IL-2 were detected in blood plasma of the examined people both before and after the irradiation. In parallel with a decrease in the proinflammatory factor levels the amount of anti-inflammatory cytokines was found to rise: that of IL-10--by 2.7-3.5 times in 0.5 h and at later terms at the initially normal parameters, and that of TGF-beta1--by 1.4-1.5 times at the initially decreased level. The IL-4 content did not change. A characteristic feature of the light effect was a fast rise of IFN-gamma amount--by 3.3-4.0 times in individuals with its initially normal level, with no changes in IFN-alpha content. The above-reported regularities of the light effects were also recorded at a direct (in vitro) irradiation of the examined volunteers' blood, as well as on addition of irradiated blood to a 10-fold volume of non-irradiated autologous blood, i.e. at a modeling of mixing, of a small amount of transcutaneously photomodified blood with its main circulating volume in the vascular bed of an irradiated person. Such a similarity of effects in blood following its irradiation in vivo and in vitro enables us to associate the fast changes of the cytokine content in the entire volume of peripheral blood with the transcutaneous photomodification of its small amounts, and with a transfer of the light effects by photomodified blood to the whole pool of circulating blood." @default.
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- W2416188414 date "2005-01-01" @default.
- W2416188414 modified "2023-10-07" @default.
- W2416188414 title "Changes in cytokine content in the peripheral blood of volunteers after their exposure to polychromatic visible and infrared light" @default.
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