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• W3072479080 abstract "Interleukin (IL)-1β produced by macrophages plays an important role in inflammation development. However, the underlying mechanism in epigenetic regulation of IL-1β production is not fully addressed. Though DNA methylcytosine dioxygenase ten-eleven translocation 2 (TET2) is known to be involved in the regulation of inflammatory factors by oxidizing 5-methylcytosine (5mC), the underlying molecular mechanism is largely unknown. In this study, we found that the expression of both IL-1β and TET2 is upregulated by lipopolysaccharide (LPS)-stimulated mononuclear macrophage. We then knocked down TET2 in mouse macrophagelike cell line (J774.1) and found that LPS-induced IL-1β is also downregulated. In addition, LPS-stimulated phosphorylation of the mitogen-activated protein kinase (MAPK) signaling pathway and intracellular effectors of the toll-like receptor 4 (TLR4) signaling pathway were also suppressed in TET2-knockdown cells. The methylation status in the promoter regions of myeloid differentiation primary response gene (MyD)88 and TAK1 binding protein 2 (TAB2) were estimated by bisulfite polymerase chain reaction. Compared with that of the control, the 5mC level on the TAB2 promoter is downregulated in the LPS-stimulated cells which can be reversed by TET2-knockdown. These findings altogether suggest that LPS-upregulated TET2 enhances IL-1β expression through demethylating the promoter region of TAB2, the key member of the TLR4/MAPK signaling pathway, a previously unreported molecular mechanism in TET2-regulated expression of inflammatory factors." @default.
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• W3072479080 date "2020-10-01" @default.
• W3072479080 modified "2023-09-26" @default.
• W3072479080 title "TET2 promotes IL-1β expression in J774.1 cell through TLR4/MAPK signaling pathway with demethylation of TAB2 promoter" @default.
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• W3072479080 doi "https://doi.org/10.1016/j.molimm.2020.08.003" @default.
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