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- W2560803412 abstract "The IL-17 family cytokines IL-17A and IL-17C drive the pathogenesis of psoriatic skin inflammation, and anti-IL-17A Abs were recently approved to treat human psoriasis. Little is known about mechanisms that restrain IL-17 cytokine-mediated signaling, particularly IL-17C. In this article, we show that the endoribonuclease MCP-1-induced protein 1 (MCPIP1; also known as regnase-1) is markedly upregulated in human psoriatic skin lesions. Similarly, MCPIP1 was overexpressed in the imiquimod (IMQ)-driven mouse model of cutaneous inflammation. Mice with an MCPIP1 deficiency (Zc3h12a+/-) displayed no baseline skin inflammation, but they showed exacerbated pathology following IMQ treatment. Pathology in Zc3h12a+/- mice was associated with elevated expression of IL-17A- and IL-17C-dependent genes, as well as with increased accumulation of neutrophils in skin. However, IL-17A and IL-17C expression was unaltered, suggesting that the increased inflammation in Zc3h12a+/- mice was due to enhanced downstream IL-17R signaling. Radiation chimeras demonstrated that MCPIP1 in nonhematopoietic cells is responsible for controlling skin pathology. Moreover, Zc3h12a+/-Il17ra-/- mice given IMQ showed almost no disease. To identify which IL-17RA ligand was essential, Zc3h12a+/-Il17a-/- and Zc3h12a+/-Il17c-/- mice were given IMQ; these mice had reduced but not fully abrogated pathology, indicating that MCPIP1 inhibits IL-17A and IL-17C signaling. Confirming this hypothesis, Zc3h12a-/- keratinocytes showed increased responsiveness to IL-17A and IL-17C stimulation. Thus, MCPIP1 is a potent negative regulator of psoriatic skin inflammation through IL-17A and IL-17C. Moreover, to our knowledge, MCPIP1 is the first described negative regulator of IL-17C signaling." @default.
- W2560803412 created "2016-12-16" @default.
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- W2560803412 date "2016-12-05" @default.
- W2560803412 modified "2023-10-16" @default.
- W2560803412 title "MCPIP1/Regnase-1 Restricts IL-17A– and IL-17C–Dependent Skin Inflammation" @default.
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- W2560803412 doi "https://doi.org/10.4049/jimmunol.1601551" @default.
- W2560803412 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5225040" @default.
- W2560803412 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27920272" @default.
- W2560803412 hasPublicationYear "2016" @default.
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