Cell lines

PAE-β cells and H526 cells

Preparation method

The solubility of this compound in DMSO is >20.9 mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37 ℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below - 20 ℃ for several months.

Reacting condition

0 nM ~ 3 mM

Applications

In PAE-β cells, CP-673451 inhibited PDGFR-β in a dose-dependent manner, with the IC50 value of 6.4nM. CP-673451 also inhibited c-kit in H526 cells, with the IC50 value of 1.1 μM. However, CP-673451 was >180× selective for PDGFR-β compared with c-kit in H526 cells.

Animal models

Mouse sponge angiogenesis model

Dosage form

3, 10 or 30 mg/kg; p.o.; q.d., for 5 days

Applications

CP-673451 (3, 10 or 30 mg/kg; p.o.; q.d., for 5 days) inhibited PDGF-BB-induced angiogenesis by 70 ~ 90%. Corresponding Cmax plasma concentrations after the last dose were 5.5 ~ 419 ng/mL. Besides, CP-673451 showed selective inhibition on PDGF-BB-induced angiogenesis over VEGF- or bFGF-induced angiogenesis (no inhibition observed).

Other notes

Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.

CP-673451 is a potent inhibitor of PDGFR with IC50 value of 10nM and 1nM for PDGFR-α and PDGFR-β, respectively [1].

CP-673451 is an ATP-competitive inhibitor and is investigated to treat for cancer. It is highly selective against PDGFR-α and PDGFR-β over a variety of other kinases such as VEGFR-1, VEGFR-2, Lck, TIE-2 and EGFR. In PAE-β cells, CP-673451 inhibits PDGFR-β with IC50 value of 6.4nM. CP-673451 also inhibits c-kit with IC50 value of 1.1μM in H526 cells. In rat C6 glioblastoma xenograft models, a single oral dose of 50mg/kg CP-673451 reduces >50% phosphorylation of PDGFR-β for 4 hours. In addition, CP-673451 is found to inhibit PDGF-BB-induced angiogenesis in a sponge angiogenesis model. Furthermore, CP-673451 inhibits the tumor growth in Colo205, LS174T, H460, and U87MG xenograft models. It also reduces the microvessel density of Colo205 xenografts [1].

References:
[1] Roberts W G, Whalen P M, Soderstrom E, et al. Antiangiogenic and antitumor activity of a selective PDGFR tyrosine kinase inhibitor, CP-673,451. Cancer research, 2005, 65(3): 957-966.