JAK2-IN-20 is an orally active dual inhibitor targeting JAK2 kinase (IC50=49.17 nM) and influenza A virus PB2 protein (IC50=3.337 μM, Kd=2.82 μM). JAK2-IN-20 effectively blocks the JAK/STAT signaling pathway by reducing the phosphorylation levels of STAT1 and STAT3, thereby inhibiting viral replication and downregulating the expression of viral NP and PB2 proteins. In addition, JAK2-IN-20 significantly inhibits the mRNA expression of key inflammatory cytokines such as IL-6, TNF-α and IFN-β in inflammation and influenza infection models. JAK2-IN-20 serves as an important tool molecule for the study of influenza A virus infection and related pathologies.
