PI-3065 is a potent inhibitor of PI3K p110δ, with IC50 and Ki values of 5 nM and 1.5 nM, and exhibits less potent activity against p110α, p110β, p110γ with IC50s of 910, 600, >10000 nM.
PI-1840 is a potent and selective chymotrypsin-like (CT-L) inhibitor for with an IC50 value of 27 nM. PI-1840 inhibits cell proliferation and arrest cell cycle at G2/M phase. PI-1840 induces apoptosis and induces autophagy. PI-1840 induces the accumulation of proteasome substrates p27, Bax, and IκB-α[1][2].