PF-431396 is an orally active dual focal adhesion kinase (FAK) and proline-rich tyrosine kinase 2 (PYK2) inhibitor, with IC50 values of 2 nM and 11 nM, respectively.
PF-431396 has a Kd value of 445 nM for BRD4.
PF-431396 appeares to selectively inhibit BCR-induced tyrosine phosphorylation of Pyk2 and FAK.
PF-431396 (2.5, 5 μM, 45 min) inhibits the phosphorylation of Pyk2 and FAK induced by clustering LFA-1 with plate-bound Abs.
Western Blot Analysis
Cell Line:
A20 cells ((10 cells in 0.5 ml of RPMI 1640 medium with 2% fetal calf serum and 50 μM 2-mercaptoethanol)).
Concentration:
0.15, 1, 2.5, 5 μM.
Incubation Time:
45 min.
Result:
The phosphorylation of Pyk2 and FAK induced by clustering LFA-1 with plate-bound Abs was also inhibited.
体内研究
PF-431396 (10 or 30 mg/kg, orally) prevents bone loss induced by estrogen deficiency in rats primarily by stimulating bone formation, providing independent pharmacological confirmation for the function of PYK2 in regulating bone formation.