PRN694 inhibits TEC, BTK, BMX, BLK, JAK3 with IC50s of 3.3, 17, 17, 125, 30 nM, respectively.
Immunoblot analysis of TCR activation pathways reveales that PRN694 blocks activation or nuclear translocation of NFAT1, JunB, pIκBα, and pERK. Results reveal inhibition of Ca signaling with PRN694 at all concentrations above 1 nM. PRN694 significantly attenuates NK cell FcR-induced killing at concentrations exceeding 0.37 μM.
Day 6 flow cytometry analysis reveals that PRN694 significantly inhibits the anti-CD3/CD28-induced proliferation of both CD4 and CD8 T-cells (p<0.01).