Small Molecule Inhibitors of Interferon‐Induced JAK‐STAT Signalling
作者:Leishemba K. Thoidingjam、Cédric M. Blouin、Christine Gaillet、Aurélien Brion、Stéphanie Solier、Supaporn Niyomchon、Ahmed El Marjou、Sara Mouasni、Fernando E. Sepulveda、Geneviève de Saint Basile、Christophe Lamaze、Raphaël Rodriguez
DOI:10.1002/anie.202205231
日期:2022.8.8
AbstractInterferons (IFN) are cytokines which, upon binding to cell surface receptors, trigger a series of downstream biochemical events including Janus Kinase (JAK) activation, phosphorylation of Signal Transducer and Activator of Transcription protein (STAT), translocation of pSTAT to the nucleus and transcriptional activation. Dysregulated IFN signalling has been linked to cancer progression and auto‐immune diseases. Here, we report the serendipitous discovery of a small molecule that blocks IFNγ activation of JAK‐STAT signalling. Further lead optimisation gave rise to a potent and more selective analogue that exerts its activity by a mechanism consistent with direct IFNγ targeting in vitro, which reduces bleeding in model of haemorrhagic colitis in vivo. This first‐in‐class small molecule also inhibits type I and III IFN‐induced STAT phosphorylation in vitro. Our work provides the basis for the development of pan‐IFN inhibitory drugs.
Six furandialkynes were prepared and investigated in gold-catalyzed reactions. Only gold(III) chloride allowed a conversion of the furandialkynes into the corresponding phenol derivative and a further conversion of the ortho-alkynylfurans into benzofurans. Free hydroxy groups in the substrate led to competing hydroalkoxylations to give acylfurans or benzofuran spiroketals.