Merck, SML2376-25MG, GSK′963

Biochem/physiol Actions
Brain-penetrant, highly potent and selective RIPK1 (RIP1) inhibitor with necroptosis blocking efficacy in vitro and in vivo.
GSK′963 (GSK′963A) is a brain-penetrant, highly potent and selective ATP site-targeting receptor-interacting protein 1 kinase (RIP1; RIPK1) inhibitor (IC50 = 0.8-8 nM with 50 μM ATP; IC50 >10 μM against RIPK2/3/5 and 335 other kinases) that protects against TNFα/zVAD-induced necroptosis (EC50 = 1/4 nM in mouse L929/human U937 cultures) and blocks Y. pestis-induced death of murine fetal liver macrophages (1 μM). GSK′963 prevents lethal hypothermia by acute sterile shock (2 mg/kg i.p. 15 min prior to TNFα/zVAD i.v.) and protects against acute neuronal death upon autologous blood intracerebral hemorrhage induction in mice in vivo (25 mg/kg/3 hr i.p.).