405554-55-4

Selective for B-Raf against 46 other kinases. SB 590885 dihydrochloride decreases anchorage-independent growth of melanoma cell lines. Inhibits ERK phosphorylation and proliferation in tumor cells expressing B-RafV600E.

sb590885 is a potent and selective inhibitor of b-raf kinase with ki value of 0.16nm [1].sb590885 is a potent inhibitor of oncogenic b-raf protein kinase with ki value of 0.16nm. it is more potent to inhibit b-raf than c-raf. the ki value of sb590885 for c-raf is 1.72nm. sb590885 is a quite selective inhibitor. it shows no activity against 48 other human kinases such as abl, ampk, ck1, ck2 and erk2. it is found that sb590885 binds to b-raf within the atp-binding pocket and stabilizes the active conformation of b-raf. sb590885 decreases the phosphorylation of erk and shows anti-proliferation only in tumor cells expressing oncogenic b-raf v600e. the normal cells and tumor cells not expressing mutant b-raf have no sensitivity towards sb590885 except the normal melanocytes and primary melanoma cells expressing wild-type b-raf. moreover, sb590885 is also found to decrease the transformed and tumorigenic properties of malignant cells expressing mutant b-raf [1].

[1] king a j, patrick d r, batorsky r s, et al. demonstration of a genetic therapeutic index for tumors expressing oncogenic braf by the kinase inhibitor sb-590885. cancer research, 2006, 66(23): 11100-11105.