Male mice (CBA x C57BL6)F1 were used for the experiments throughout this study. The levels of spontaneous and LPS-stimulated cytokines production (IL-1 beta, IL-6 and TNF-alpha) by peritoneal, splenic, and bone marrow macrophages were evaluated by means of enzyme-linked immunosorbent assay at 3, 6, 24, 48 and 72 hours after irradiation alone or combined injury (irradiation + thermal burn). The results suggest that macrophages, harvested from the main mice hematopoietic organs (bone marrow, spleen), did not increase cytokines production within the first three days following the 7 Gy gamma-irradiation or combined injury. Peritoneal macrophages revealed a capacity to enhance IL-6 and IL-1 production versus normal healthy mice. There were no significant differences of cytokine-producing activity if macrophages were harvested from irradiated or combined injured mice.
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