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- W1973287716 abstract "The mechanisms involved in the modulation of cutaneous immune responses by UV radiation have been extensively investigated; by contrast, few studies have addressed the effects of x-irradiation on epidermal immune function. We therefore investigated the effect of x-irradiation of mice on: (a) the density of epidermal Ia+ Langerhans cells (LC) in immunofluorescence studies, (b) epidermal cell (EC) allostimulatory capacity in the allogeneic EC-lymphocyte reaction (ELR), and (c) production of epidermal cell-derived thymocyte activating factor (ETAF). C3H/He and BALB/c mice were irradiated with 900, 1,800, 2,700, or 3,600 rad from a 137Cs source, and sacrificed 10 h or 3 days later. X-irradiation of mice 10 h previously only slightly decreased the density of epidermal Ia+ LC and did not affect the capacity of their EC to stimulate allogeneic responder lymphocytes in the ELR. X-irradiation of mice 3 days previously, however, resulted in a dose-dependent decrease in the density of Ia+ LC. This decrease was accompanied by a substantial reduction in EC allostimulatory capacity in the ELR at all doses of x-irradiation. ETAF production by cultured EC from mice x-irradiated 3 days previously was also found to be diminished at all doses of x-irradiation. Trypan blue exclusion studies demonstrated that the observed decreases in EC allostimulatory capacity and ETAF production were not the result of a generalized lethal effect of x-irradiation on EC. The reduction in EC allostimulatory capacity following in vivo x-irradiation could not be reversed by addition of exogenous ETAF or interleukin-1 in the ELR. Taken together, these results indicate that x-irradiation decreases the density of Ia+ LC, impairs LC alloantigen-presenting function, and reduces ETAF production. Thus cutaneous x-irradiation may affect inflammatory and neoplastic processes not only by its antimitotic activity, but also by a direct effect on EC which subserve immunologic functions." @default.
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- W1973287716 date "1985-12-01" @default.
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- W1973287716 title "Effect of X-irradiation on Epidermal Immune Function: Decreased Density and Alloantigen-Presenting Capacity of Ia+ Langerhans Cells and Impaired Production of Epidermal Cell-Derived Thymocyte Activating Factor (ETAF)" @default.
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- W1973287716 doi "https://doi.org/10.1111/1523-1747.ep12277399" @default.
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