Research ArticleCytokines

IL-17 integrates multiple self-reinforcing, feed-forward mechanisms through the RNA binding protein Arid5a

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Science Signaling  09 Oct 2018:
Vol. 11, Issue 551, eaat4617
DOI: 10.1126/scisignal.aat4617

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Stabilizing the IL-17 response

The inflammatory cytokine IL-17 can stimulate both antifungal host defense and autoimmunity by promoting the stability of target mRNAs (see the Focus by Puel and Casanova). Amatya et al. found that IL-17 increased the abundance of the RNA binding protein Arid5a in mouse cells. Loss of Arid5a decreased the cellular response to IL-17 by reducing the mRNA stability of a selection of IL-17–stimulated transcripts. For others, Arid5a instead interacted with the translation initiation factor eIF4G to augment their translation. Thus, Arid5a uses multiple posttranscriptional mechanisms to enhance IL-17 signaling.