| First Author | Cao L | Year | 2019 |
| Journal | Sci Signal | Volume | 12 |
| Issue | 573 | PubMed ID | 30890658 |
| Mgi Jnum | J:283512 | Mgi Id | MGI:6380998 |
| Doi | 10.1126/scisignal.aau4604 | Citation | Cao L, et al. (2019) HIPK2 is necessary for type I interferon-mediated antiviral immunity. Sci Signal 12(573) |
| abstractText | Precise control of interferons (IFNs) is crucial to maintain immune homeostasis. Here, we demonstrated that homeodomain-interacting protein kinase 2 (HIPK2) was required for the production of type I IFNs in response to RNA virus infection. HIPK2 deficiency markedly impaired IFN production in macrophages after vesicular stomatitis virus (VSV) infection, and HIPK2-deficient mice were more susceptible to lethal VSV disease than were wild-type mice. After VSV infection, HIPK2 was cleaved by active caspases, which released a hyperactive, N-terminal fragment that translocated to the nucleus and further augmented antiviral responses. In part, HIPK2 interacted with ELF4 and promoted its phosphorylation at Ser(369), which enabled Ifn-b transcription. In addition, HIPK2 production was stimulated by type I IFNs to further enhance antiviral immunity. These data suggest that the kinase activity and nuclear localization of HIPK2 are essential for the production of type I IFNs. |
