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- W4313347785 abstract "Abstract Macrophages derived from IFN-regulatory factor-1 (IRF-1) and IRF-2 knockout (−/−) and wild-type (+/+) mice were utilized to examine the role of these transcription factors in the regulation of IL-12 mRNA and protein expression. Induction of IL-12 p40 mRNA by LPS was markedly diminished in both IRF-1−/− and IRF-2−/− macrophages. In contrast, IRF-1−/−, but not IRF-2−/−, macrophages exhibited impaired LPS-induced IL-12 p35 mRNA expression. The ability of IFN-γ to augment LPS-induced IL-12 p40 mRNA further when both stimuli were present simultaneously was significantly diminished in both IRF-1−/− and IRF-2−/− macrophages, with the most profound impairment observed for IRF-1−/− macrophages. Reductions in IL-12 mRNA expression after stimulation with LPS or LPS plus IFN-γ were accompanied by substantial reductions in IL-12 p40 and IL-12 p70 protein in both IRF-1−/− and IRF-2−/− macrophages. Priming IRF-1−/− and IRF-2−/− macrophages with IFN-γ for 24 h before LPS treatment partially restored impaired IL-12 mRNA and protein production in both IRF-1−/− and IRF-2−/− macrophages. Depressed IL-12 levels were paralleled by significant reductions in IFN-γ mRNA expression in IRF-1−/− and IRF-2−/− macrophages. These results indicate that both IRF-1 and IRF-2 are critical transcription factors in the regulation of macrophage IL-12 and consequently IFN-γ production." @default.
- W4313347785 created "2023-01-06" @default.
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- W4313347785 date "1999-08-01" @default.
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- W4313347785 title "IL-12 Is Dysregulated in Macrophages from IRF-1 and IRF-2 Knockout Mice" @default.
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- W4313347785 doi "https://doi.org/10.4049/jimmunol.163.3.1529" @default.
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