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- W2119237844 abstract "TLR agonists such as LPS and poly(I:C) induce expression of type I IFNs, such as IFN-α and -β, by macrophages. To examine the role of IFN-β in the induction of ISGs by LPS, we compared the ability of LPS to induce ISGF3 activity and ISG expression in bone marrow-derived macrophages from WT and Ifnb1(-/-) mice. We found that LPS treatment activated ISGF3 and induced expression of ISGs such as Oas1, Mx1, Ddx58 (RIG-I), and Ifih1 (MDA5) in WT macrophages, but not in macrophages derived from Ifnb1(-/-) mice or Ifnar1(-/-) mice. The inability of LPS to induce activation of ISGF3 and ISG expression in Ifnb1(-/-) macrophages correlated with the failure of LPS to induce activation of STAT1 and -2 in these cells. Consistent with these findings, LPS treatment also failed to induce ISG expression in bone marrow-derived macrophages from Stat2 KO mice. Although activation of ISGF3 and induction of ISG expression by LPS was abrogated in Ifnb1(-/-) and Ifnar1(-/-) macrophages, activation of NF-κB and induction of NF-κB-responsive genes, such as Tnf (TNF-α) and Il1b (IL-1β), were not affected by deletion of either the IFN-β or IFN-αR1 genes. These findings demonstrate that induction of ISGF3 activity and ISG expression by LPS is critically dependent on intermediate production of IFN-β and autocrine signaling through type I IFN receptors." @default.
- W2119237844 created "2016-06-24" @default.
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- W2119237844 date "2014-07-14" @default.
- W2119237844 modified "2023-10-14" @default.
- W2119237844 title "An essential role for IFN-β in the induction of IFN-stimulated gene expression by LPS in macrophages" @default.
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- W2119237844 doi "https://doi.org/10.1189/jlb.2a0414-191r" @default.
- W2119237844 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4163629" @default.
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