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Description

A cell-permeable hydroxynaphthalenylthioacetate that targets Mcl-1 BH3-binding groove and selectively competes against 8 nM FITC-AHA-BIM142-161 for Mcl-1, but not Bcl-xL, binding (IC50 = 310 nM vs &,gt,40 &,micro,M, [Mcl-1] &, [Bcl-xL] = 6.25 nM), displaying little inhibitory potency toward CYP450 isoforms 1A2/2D6/3A4/2C9 (IC50 = >,10 µ,M). Antiproliferation potencies against 2 murine lymphoma cell lines (GI50 = 300 nM/ MCl1-1780 &, 1.1 microM/Bcl2-1863) and 11 human cancer lines of various origins (GI50 from 1.6 to 25 microM) correlate well with intracellular BH3 domain peptide-binding capacity. Likewise, greater apoptosis induction is observed in MCl1-1780 than the highly Bcl-2/Bcl-xL primed Bcl2-1863 cultures upon drug treatment. Stability studies using murine and human liver microsome preparations reveal t1/2 values of 40 min and 55 min, respectively., A cell-permeable hydroxynaphthalenylthioacetate that targets Mcl-1 BH3-binding groove and selectively competes against 8 nM FITC-AHA-BIM142-161 for Mcl-1, but not Bcl-xL, binding (IC50 = 310 nM vs >,40 µ,M, [Mcl-1] & [Bcl-xL] = 6.25 nM). Antiproliferation potencies against 2 murine lymphoma cell lines and 11 human cancer lines of various origins (GI50 from 0.3 to 25 microM) correlate well with intracellular BH3 domain peptide-binding capacity. Likewise, greater apoptosis induction is observed in MCl1-1780 than the highly Bcl-2/Bcl-xL primed Bcl2-1863 cultures upon drug treatment.