BMS-935177 is a potent, reversible Bruton's Tyrosine Kinase (BTK) inhibitor with an IC50 value of 2.8 nM and demonstrates good kinase selectivity. It is more potent against BTK than other kinase, including the other Tec family kinases (TEC, BMX, ITK, and
BMS-935177 is a potent, reversible Bruton's Tyrosine Kinase (BTK) inhibitor with an IC50 value of 2.8 nM and demonstrates good kinase selectivity. It is more potent against BTK than other kinase, including the other Tec family kinases (TEC, BMX, ITK, and TXK) over which the compound is between 5- and 67-fold selective.
BMS-935177 shows greater than 50-fold selectivity over the SRC family of kinases, including 1100-fold selectivity over SRC itself. Other kinases inhibited with a potency less than 150 nM (50-fold selectivity) included TRKA, HER4, TRKB, and RET. It inhibits calcium flux in human Ramos B cells (IC50 = 27 nM) and inhibits CD69 surface expression in peripheral B cells stimulated with anti-IgM and anti-IgG. However, BMS-935177 has no effect on CD69 surface expression in B cells stimulated through the CD40 receptor with CD40 ligand. Against IgG-containing immune complex-driven low affinity activating Fcγ receptor (FcγRIIa and FcγRIII) end points in peripheral blood mononuclear cells (PBMCs), BMS-935177 effectively inhibited TNFα production with an IC50 value of 14 nM[1].
Plasma protein binding for BMS-935177 is high for all species, with less than 1% free for human. It has excellent oral bioavailability in all preclinical species, from both suspension and solution dosing, despite its low aqueous solubility. The oral bioavailability for BMS-935177 with solution dosing ranges from 84% to 100% in rat, mouse, dog, and cynomolgus monkey, with low clearance in single intravenous (iv) infusion studies. When dosed at 2 mg/kg i.v. in mouse and rat, the T1/2 of BMS-935177 is 4 h and 5.1 h respectively[1].
[1] De Lucca GV, et al. J Med Chem. 2016, 59(17):7915-35.
Kinase experiment: | BMS-935177 is dissolved at 10 mM in DMSO and evaluated at 11 concentrations . To V-bottom 384- well plates are added BMS-935177, human recombinant BTK (1 nM), fluoresceinated peptide (1.5 μM), ATP (20 μM (Km app)), and assay buffer (20 mM HEPES, pH 7.4, 10 mM MgCl2, 0.015% Brij 35 surfactant, and 4 mM DTT in 1.6% DMSO), with a final volume of 30 μL. After incubation at room temperature for 60 min, the reaction is terminated by adding 45 μL of 35 mM EDTA to each sample. The reaction mixture is analyzed on the by electrophoretic separation of the fluorescent substrate and phosphorylated product (excitation, 488 nm; emission, 530 nm)[1]. |
Animal experiment: | Rats[1]Male Sprague?Dawley rats (255-298 g) are used in the PK studies. To investigate the oral bioavailability of BMS-935177 after crystalline microsuspension doses, rats receive BMS-935177 by oral gavage (1, 5, and 20 mg/kg), T99.5% 10 mM citrate buffer, pH 4, 0.02% DOSS, Methocel A4M. Serial blood samples are obtained after oral dosing at 0.25, 0.5, 0.75, 1, 2, 4, 6, 8, and 24 h postdose. Plasma samples, obtained by centrifugation at 4 °C (1500-2000g), are stored at ?20 °C until analysis[1].Mice[1]Efficacy of BMS-935177 (10 and 30 mg/kg) vs vehicle and dexamethasone (Dex) is studied in a mouse anti-collagen antibody-induced arthritis (CAIA) inflammation model. Mice are injected intraperitoneally (ip) with a mixture of four monoclonal antimouse type II collagen antibodies (1 mg of each). Daily oral dosing is immediately started with vehicle (EtOH:TPGS:PEG300, 5:5:90), BMS-935177 (10 or 30 mg/kg), or dexamethasone (dex, 1 mg/kg). Three days later, the mice are injected ip with 1.25 mg/kg LPS. Thereafter, mice are monitored 3×/ week for the development and severity of paw inflammation[1]. |
参考文献: [1]. De Lucca GV, et al. Small Molecule Reversible Inhibitors of Bruton's Tyrosine Kinase (BTK): Structure-Activity Relationships Leading to the Identification of 7-(2-Hydroxypropan-2-yl)-4-[2-methyl-3-(4-oxo-3,4-dihydroquinazolin-3-yl)phenyl]-9H-carbazole-1-carboxamide (BMS-935177). J Med Chem. 2016 Sep 8;59(17):7915-35. | |
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