We studied differences in the production of pro- and anti-inflammatory cytokines and IRF3 transcription factor by peritoneal macrophages from mice of opposite strains CBA/J and C57Bl/6 and the effect of 60-kDa oxidized dextran on these parameters. Macrophages from C57Bl/6 mice were mainly characterized by the production of proinflammatory cytokines TNFα, IL-12, and MCP-1 (markers of M1 polarization). By contrast, CBA/J mice exhibited a relatively high level of anti-inflammatory cytokine IL-10 and lower expression of proinflammatory cytokines (M2 phenotype). IRF3 content in peritoneal macrophages of CBA/J mice was higher than in C57Bl/6 mice. Oxidized dextran decreased the expression of IRF3 upon stimulation of cells from CBA/J mice with LPS, but increased this process in C57Bl/6 mice. Despite a diversity of oxidized dextran-induced changes in cytokine production, the data confirm our hypothesis that this agent can stimulate the alternative activation of macrophages.
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