VER-155008 is an adenosine-derived inhibitor of heat shock protein 70 (Hsp70; IC50 = 0.5 μM) tIt targets the nucleotide-binding domain (NBD) of Hsp70 and similarly binds the NBDs of Hsp70 cognates Hsc70 (Ki = 10 μM) and glucose-regulated protein 78 (Grp78; KD = 80 nM).hat is selective over Hsp90. VER-155008 inhibits the proliferation of human breast and colon cancer cell lines, inducing apoptosis or caspase-independent cell death. It induces the proteasome-dependent degradation of Hsp90 client proteins and potentiates the apoptotic activity of Hsp90 inhibitors.
BYL719(cas 1217486-61-7) is a potent and selective PI3Kα inhibitor with IC50 of 5 nM, liitle or no effect on PI3Kβ/γ/δ. BYL719 inhibits the proliferation of breast cancer cell lines harboring PIK3CA mutations, correlating with inhibition of various downstream signaling components of the PI3K/Akt pathway.
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