HG-9-91-01 is an ATP site-targeting WH-4-023 (KIN112) structural analog that inhibits salt-inducible kinases (SIKs) with improved potency (IC50 = 0.6/6.6/9.6 nM against SIK1/2/3) and selectivity, exhibiting significant inhibitory activity only against 4 kinases among a panel of 108 (% inhibition at 100 nM ∼85/EPHA2, 88/EPHA4, 91/Src, 88/YES1) and much reduced or little potency toward the others (by <67% inhibition at 100 nM), including AMPK-related kinases BTK, MARK and NUAK. HG-9-91-01 (500 nM) enhances LPS-induced IL-10 production, while suppresses proinflammatory cytokine secretion from murine marrow-derived macrophages & dendritic cells (BMDMs & BMDCs) as well as primary human macrophages in a CRTC3-dependent manner. A useful tool for studying SIKs-mediated cellular signaling events.
Potent and selective inhibitor against salt-inducible kinases SIK1, SIK2, and SIK3
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