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Nat Immunol. 2009 Dec;10(12):1252-9. doi: 10.1038/ni.1798. Epub 2009 Oct 18.

MicroRNA miR-326 regulates TH-17 differentiation and is associated with the pathogenesis of multiple sclerosis.

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Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.

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  • Nat Immunol. 2010 Jun;11(6):543.


Interleukin 17 (IL-17)-producing T helper cells (T(H)-17 cells) are increasingly recognized as key participants in various autoimmune diseases, including multiple sclerosis. Although sets of transcription factors and cytokines are known to regulate T(H)-17 differentiation, the role of noncoding RNA is poorly understood. Here we identify a T(H)-17 cell-associated microRNA, miR-326, whose expression was highly correlated with disease severity in patients with multiple sclerosis and mice with experimental autoimmune encephalomyelitis (EAE). In vivo silencing of miR-326 resulted in fewer T(H)-17 cells and mild EAE, and its overexpression led to more T(H)-17 cells and severe EAE. We also found that miR-326 promoted T(H)-17 differentiation by targeting Ets-1, a negative regulator of T(H)-17 differentiation. Our data show a critical role for microRNA in T(H)-17 differentiation and the pathogenesis of multiple sclerosis.

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