PF-562271 besylate

• CAT Number: I005582
• CAS Number: 939791-38-5
• Molecular Formula: C₂₁H₂₀F₃N₇O₃S • CH₆O₃S
• Molecular Weight: 665.66
• Purity: ≥95%
• Synonyms: PF562271 besylate
• Target: FAK
• Solubility: DMSO: ≤ 24.5 mg/mL
• Storage: 3 years -20C powder
• IC50: 1.5 nM(FAK); 14 nM(Pyk2)
• InChI: InChI=1S/C21H20F3N7O3S.C6H6O3S/c1-31(35(2,33)34)19-12(4-3-7-25-19)10-26-18-15(21(22,23)24)11-27-20(30-18)28-14-5-6-16-13(8-14)9-17(32)29-16;7-10(8,9)6-4-2-1-3-5-6/h3-8,11H,9-10H2,1-2H3,(H,29,32)(H2,26,27,28,30);1-5H,(H,7,8,9)
• InChIKey: LKLWTLXTOVZFAE-UHFFFAOYSA-N
• SMILES: CN(C1=C(C=CC=N1)CNC2=NC(=NC=C2C(F)(F)F)NC3=CC4=C(C=C3)NC(=O)C4)S(=O)(=O)C.C1=CC=C(C=C1)S(=O)(=O)O

PF-562271 besylate is a potent, ATP-competitive, reversible inhibitor of FAK with IC50 of 1.5 nM, ~10-fold less potent for Pyk2 than FAK and >100-fold selectivity against other protein kinases, except for some CDKs. 


PF-562271 binds in the ATP-binding cleft of FAK, forming two of the three “canonical” H-bonds between the inhibitor and main-chain atoms in the kinase hinge region. PF-562271 is potent in an inducible cell-based assay measuring phospho-FAK with IC50 of 5 nM. PF-562271 (3.3 μM) results in G1 arrest of PC3-M cells [1]. PF-562271 (1 nM) blocks bFGF-stimulated blood vessel angiogenesis as performed in chicken chorioallantoic membrane assays. PF-262271 potently blocks blood vessel sprouting without detectable changes in vascular leakage [2]. PF-562271 (250 nM) results in complete inhibition of collective A431 cell invasion into collagen gels [3].
in vivo: PF-562271 (< 33 mg/kg p.o.) inhibits FAK phosphorylation in tumors in a dose- and time-dependent manner in U87MG-bearing mice. PF-562271 (50 mg/kg p.o. bid) results in 86% tumor growth inhibition in BxPc3 xenografts mice and 45% tumor growth inhibition in PC3-M xenografts mice. PF-562271 (25 mg/kg, bid) results in 2-fold greater apoptosis in treated tumors in mice bearing H125 lung xenografts [1]. PF-562271 (33 mg/kg, p.o.) inhibits extensive movement of the tumor cells over 24 hours in mice. PF-562271 (33 mg/kg, p.o.) results in altered E-cadherin dynamics in mice, which correlates with reduced E-cadherin–dependent collective cell movement [3].

Reference

[1]. Roberts WG, et al. Antitumor activity and pharmacology of a selective focal adhesion kinase inhibitor, PF-562,271. Cancer Res, 2008, 68(6), 1935-1944. 


[2]. Lim ST, et al. FERM control of FAK function: implications for cancer therapy. Cell Cycle, 2008, 7(15), 2306-2314.


[3]. Canel M, et al. Quantitative in vivo imaging of the effects of inhibiting integrin signaling via Src and FAK on cancer cell movement: effects on E-cadherin dynamics. Cancer Res, 2010, 70(22), 9413-9422.