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DMX-5084 is an inhibitor of MAP4K4 (IC50 = 3 nM).1 It is selective for MAP4K4 over a panel of 141 kinases at 1 µM but does inhibit MAP4K6 and TRAF2- and NCK-interacting kinase (TNIK; IC50s = 6.61 and 10.96 nM, respectively). DMX-5084 prevents hydrogen peroxide-induced decreases in viability in vCor.4U ventricular cardiomyocytes (EC50 = 3.16 nM). It inhibits decreases in the oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) induced by menadione (vitamin K3; Item No. 15950) in vCor.4U cells when used at concentrations of 3 or 10 µM. DMX-5084 prevents menadione-induced decreases in the number of beats per minute and force of contraction in a 3D human-engineered heart tissue (hEHT) model using vCor.4U cells. In vivo, DMX-5084 (50 mg/kg) reduces infarct size in a mouse model of ischemia-reperfusion injury induced by left anterior descending (LAD) coronary artery occlusion.
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1. MAP4K4 inhibition promotes survival of human stem cell-