ROCK2 ,ROCK1

326.37

DMSO 65 mg/mL (199.16 mM)

Powder

RKI-1447 is a cell-permeable pyridylthiazolyl-urea that acts as a potent, ATP site-targeting Rho Kinase inhibitor, displaying much reduced potency against PKA, PKN1/PRK1, p70S6K/RPS6kB1, AKT1, MRCKa/CDC42BPA (85.5%, 80.5%, 61.9%, 56.0%, and 50.4% inhibition, respectively, by 1 µM RKI-1447) or 15 other kinases. Crystal structures of the RKI-1447/ROCK1 complex reveals that RKI-1447 is a Type I kinase inhibitor that binds the ATP binding site through interactions with the hinge region and the DFG motif. RKI-1447 suppresses phosphorylation of the ROCK substrates MLC-2 and MYPT-1 in human cancer cells, but had no effect on the phosphorylation levels of the AKT, MEK, and S6 kinase at concentrations as high as 10 μM. RKI-1447 is also highly selective at inhibiting ROCK-mediated cytoskeleton re-organization (actin stress fiber formation) following LPA stimulation, but does not affect PAK-meditated lamellipodia and filopodia formation following PDGF and Bradykinin stimulation. RKI-1447 inhibits migration, invasion and anchorage-independent tumor growth of breast cancer cells.

RKI-1447 is highly effective at inhibiting the outgrowth of mammary tumors in a transgenic mouse model. Tumors from mice treated with the RKI-1447 increases in size with an average percent change in tumor volume of only 8.8%. Thus, RKI-1447 inhibited mammary tumor growth by 87%, and on average the mammary tumors from Compared with those tumors from mice treated with the vehicle control, RKI-1447 treated mice are 7.7-fold smaller. RKI-1447 treatments does not result in mouse weight loss.

RKI 1447; RKI1447

C₁₆H₁₄N₄O₂S

1342278-01-6