KIN-8194

KIN-8194 (KIN8194) is a highly potent dual HCK and BTK inhibitor with IC50 of <0.495 and 0.915 nM, respectively.KIN-8194 demonstrated greater selectivity compared with A419259 with no KIT, RET, PDGFRA, EPHB6, or CDPK1 inhibition.KIN-8194 binds to gatekeeper residue Thr333 of HCK, but not to Cys481 of BTK.KIN-8194 shows robust inhibition of both HCK and BTK activity in MYD88-mutated cells, showed robust inhibition of HCK Tyr410 phosphorylation; inhibits the growth and survival of MYD88-mutated WM and ABC DLBCL cells.KIN-8194 overcomes ibrutinib resistance relatedto BTK Cys481Ser-expressing MYD88-mutated B-cell lymphoma cells, synergizes with the BCL-2 inhibitor venetoclax.KIN-8194 shows superior activity over ibrutinib in MYD88-mutated TMD-8 ABC DLBCL xenograft mouse model.KIN-8194 is active against ibrutinib resistance in BTK Cys481Ser -expressing ABC DLBCL xenograft mouse model.

1. Guang Yang, et al. Blood. 2021 Nov 18;138(20):1966-1979.