Pim (provirus integration site for Moloney murine leukemia virus) family proteins are highly conserved serine/threonine kinases implicated in transcription, translation, cell cycle, survival, and drug resistance through the numerous targets. CX-6258 Hydrochloride is the hydrochloride form of CX-6258. CX-6258 is a selective and potent Pim inhibitor with IC50 values of 5nM, 25nM and 16nM for Pim-1, Pim-2 and Pim-3 (measured by SAR assay), respectively. Treatment with CX-6258 at concentration ranging in 0.1-10μM for 2h caused dose-dependent reduction of phosphorylation level of BAD, a substrate of Pim-1, and 4E-BP1-S65 and 4E-BP1-T37/46 in MV-4-11 cells. CX-6258 showed antiproliferative activity against a panel of cell lines derived from human solid tumors and hematological malignancies with IC50 values ranging in 0.02-3.7μM, most potent to acute leukemia cell lines. In vivo study showed that oral administration of CX-6258 at dose of 50 or 100mg/kg, once daily for 21 days reduced tumor growth in MV-4-11 xenograft models without obvious weight loss observed[1].
作用机制
CX-6258 can bind to the ATP binding pocket of Pim-1 enzyme.[1]
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