PF-562271 Besylate

2 years -80 in solvent

Administered via p.o.

Squamous cell carcinoma (SCC)

<=100 mg/kg

1.5 nM, 1.5 nM, 1.5 nM, 1.5 nM, 1.5 nM, 1.5 nM

In several human s.c. xenograft models, PF-562271 exhibits dose-dependent tumor growth inhibition, and produces maximum tumor inhibition for PC-3M, BT474, BxPc3, and LoVo ranging from 78% to 94% inhibition at doses of 25 to 50 mg/kg twice daily, without weight loss, morbidity, or death. [1] PF-562271 (25 mg/kg by p.o.) leads to a significant decrease in tumor progression in both subcutaneous and bone metastasis PC3M-luc-C6 xenograft models. [3] In a Huh7.5 hepatocellular carcinoma xenograft model, combination therapy of sunitinib and PF-562271 targets angiogenesis and tumor aggressiveness, and produces more significant anti-tumor effect than single agent by blocking tumor growth and impacting the ability of the tumor to recover upon withdrawal of the therapy. [4]

Recombinant kinase assay and enzyme kinetics, Briefly, purified-activated FAK kinase domain (amino acid 410–689) is reacted with 50 uM ATP and 10 ug per well of a random peptide polymer of Glu and Tyr, p(Glu/Tyr), in kinase buffer [50 mM HEPES (pH 7.5), 125 mM NaCl, and 48 mM MgCl2] for 15 minutes. Phosphorylation of p(Glu/Tyr) is challenged with serially diluted PF-562271 at 1/2-Log concentrations starting at a top concentration of 1 uM. Each concentration is tested in triplicate. Phosphorylation of p(Glu/Tyr) is detected with a general antiphospho-tyrosine (PY20) antibody followed by horseradish peroxidase (HRP)-conjugated goat anti-mouse IgG antibody. HRP substrate is added, and absorbance readings at 450 nm are obtained after addition of stop solution (2 M H2SO4). IC50 values are determined using the Hill-Slope Model. Broad kinase selectivity profiling is performed in house and by using the KinaseProfiler Selectivity Screening Service available through UpState Biotechnology.

DMSO 0.4 mg/mL, Water <1 mg/mL, Ethanol <1 mg/mL

N-methyl-N-(3-((2-(2-oxoindolin-5-ylamino)-5-(trifluoromethyl)pyrimidin-4-ylamino)methyl)pyridin-2-yl)methanesulfonamide benzenesulfonate