| First Author | Luo Q | Year | 2023 |
| Journal | Immunity | Volume | 56 |
| Issue | 9 | Pages | 2006-2020.e6 |
| PubMed ID | 37473759 | Mgi Jnum | J:341126 |
| Mgi Id | MGI:7528596 | Doi | 10.1016/j.immuni.2023.06.012 |
| Citation | Luo Q, et al. (2023) An autonomous activation of interleukin-17 receptor signaling sustains inflammation and promotes disease progression. Immunity 56(9):2006-2020.e6 |
| abstractText | Anti-interleukin-17 (IL-17) therapy has been used in various autoimmune diseases. However, the efficacy is unexpectedly limited in several IL-17-associated diseases, and the mechanism of limited efficacy remains unclear. Here, we show that a molecular complex containing the adaptor molecule Act1 and tyrosine phosphatase SHP2 mediated autonomous IL-17R signaling that accelerated and sustained inflammation. SHP2, aberrantly augmented in various autoimmune diseases, was induced by IL-17A itself in astrocytes and keratinocytes, sustaining chemokine production even upon anti-IL-17 therapies. Mechanistically, SHP2 directly interacted with and dephosphorylated Act1, which replaced Act1-TRAF5 complexes and induced IL-17-independent activation of IL-17R signaling. Genetic or pharmacologic inactivation of SHP2, or blocking Act1-SHP2 interaction, paralyzed both IL-17-induced and IL-17-independent signaling and attenuated primary or relapsing experimental autoimmune encephalomyelitis. Therefore, Act1-SHP2 complexes mediate an alternative pathway for autonomous activation of IL-17R signaling, targeting which could be a therapeutic option for IL-17-related diseases in addition to current antibody therapies. |
