Refametinib (RDEA119, Bay 86-9766)
Catalog No.S1089 Synonyms: BAY 869766
Molecular Weight(MW): 572.34
Refametinib (RDEA119, Bay 86-9766) is a potent, ATP non-competitive and highly selective inhibitor of MEK1 and MEK2 with IC50 of 19 nM and 47 nM, respectively.
Cited by 12 Publications
4 Customer Reviews
RDEA119 (1 µM) or JTP-74057 (0.1 µM) abolished the effects of G1 on DAPK1 and NR2B phosphorylation.
J Neurosci, 2012, 32(14): 4887-900. Refametinib (RDEA119, Bay 86-9766) purchased from Selleck.
Western blot analyses of downstream effector proteins of the MAPK signaling pathway. The panel of CRC cell lines was treated with or without refametinib (1 lM) for 72 h. a-Tubulin served as a loading control.
Mol Oncol, 2018, 12(8):1398-1409. Refametinib (RDEA119, Bay 86-9766) purchased from Selleck.
B: ERK and p-ERK1/2 levels in response to MEKi treatment. Tra = trametinib, Ref = refametinib, Sel = selumetinib, Bin = binimetinib. Films were intentionally overexposed to detect signal in lanes with low p-ERK1/2 expression. For each cell line all treatment conditions were performed as part of the same experiment. All experimental findings were confirmed in independent experiments performed in triplicate. Note: membranes incubated with p-ERK1/2 antibody were overexposed to capture all remaining signal after MEKi treatment. WB images have been cut to keep the same sample order. All membranes incubated with the same antibody have been exposed for the same period of time.
Am J Cancer Res, 2016, 6(10):2235-2251. Refametinib (RDEA119, Bay 86-9766) purchased from Selleck.
MEK inhibition of hypoosmolar-induced ADM. In all panels KrasG12D acinar explants were isolated and starved overnight. The next day explants were incubated with hypoosmotic (150 mOsm) medium for 5 min and then refametinib was added at the indicated concentrations. (A) HRP assay from two mice was performed immediately after the 5 min hypoosmotic treatment. Mean ± SD, two-tailed t-test. (B) Acinar explants were seeded in collagen and ADM was quantified at day 4. N = number of mice. Mean ± SD, two-tailed t-test. (C) Representative bright field images of acinar explants described in B. Dashed lines highlight acinar cell clusters, arrowheads: duct-like structures. Scale bars = 50 μm.
EBioMedicine, 2017, 15:90-99. Refametinib (RDEA119, Bay 86-9766) purchased from Selleck.
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|Description||Refametinib (RDEA119, Bay 86-9766) is a potent, ATP non-competitive and highly selective inhibitor of MEK1 and MEK2 with IC50 of 19 nM and 47 nM, respectively.|
RDEA119 is selectively bound directly to an allosteric pocket in the MEK1/2 enzymes, and highly efficacious at inhibiting cell proliferation in several tumor cell lines, including A375, SK-MEI-28, Colo205, HT-29 and BxPC3. RDEA119 inhibits anchorage-dependent growth of human cancer cell lines harboring the gain-of-function V600E BRAF mutant with GI50 values ranging from 67 to 89 nM. Under anchorage-independent conditions, GI50 values for all cell lines tested are similar (40-84 nM). RDEA119 shows a tissue selectivity that reduces its potential for central nervous system–related side effects.  RDEA119 potently inhibits the proliferation of the 4 cell lines that harbored BRAF mutation but has no or modest effects on the other 4 cells that harbored wild-type BRAF (IC50 of 0.034-0.217 μM vs. 1.413-34.120 μM). This inhibitory effect of RDEA119 in selected cell lines OCUT1 (BRAF V600E(+), PIK3CA H1047R(+)) and SW1376 (BRAF V600E(+)) is enhanced by combination with the mTOR inhibitor, temsirolimus. RDEA119 and temsirolimus also show synergistic effects on autophagic death of OCUT1 and KAT18 cells selectively tested. 
|In vivo||Oral administration of RDEA119 at 50 mg/kg on a once daily × 14 schedule leads to a 68% tumor growth inhibition (TGI) in human melanoma A375 tumor model. Oral administration of RDEA119 at 25 mg/kg on a once a once daily × 14 schedule leads to a 123% TGI in human colon carcinoma Colo205 tumor model (TGI > 100% occurs when the tumor shrinks below its starting volume). A dose of 25 mg/kg once daily × 14 produces 56% and 67% TGI for HT-29 and A431 tumors, respectively. |
MEK Kinase Assay:Kinase inactive murine ERK2 (mERK2) K52A/T183A is affinity purified from Escherichia coli expressed using the pET21a vector. MEK1 kinase activity is determined using mERK2 K52A T183A as the substrate. Recombinant MEK1 enzyme (5 nM) is first activated by 0.02 unit or 1.5 nM of RAF1 in the presence of 25 mM HEPES (pH 7.8), 1 mM MgCl2, 50 mM NaCl, 0.2 mM EDTA, and 50 μM ATP for 30 minutes at 25 °C. The reactions are initiated by adding 2 μM of mERK2K52A T183A and 2.5 μCi [γ-33P] ATP in a total volume of 20 μL. The MEK2 kinase activity is determined similarly except that activation by RAF1 is not needed and 11 nM of MEK2 enzyme (active) are used in the assays.Kinase profiling is performed by Invitrogen using their Select Screen Kinase Profiling Service. The Z'-LYTE biochemical assay is used. RDEA119 is assayed in quadruplicate at 10 μM against 205 kinases.
|In vitro||DMSO||100 mg/mL (174.72 mM)|
|Ethanol||100 mg/mL (174.72 mM)|
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