Mcl-1 inhibitor 3

Mcl-1 inhibitor 3 (compound 1) is a highly potent and orally activate macrocyclic Mcl-1 inhibitor (Ki= 0.061 nM; IC50=19 nM in an OPM-2 cell viability assay). Mcl-1 inhibitor 3 shows good pharmacokinetic properties and excellent in vivo efficacy without toxicity[1]. .

Signaling Pathways >> Apoptosis >> Bcl-2 Family

Research Areas >> Cancer

Mcl-1:19 nM (IC50)

Mcl-1:0.061 nM (Ki)

Mcl-1 inhibitor 3 shows an IC50 value of 19 nM in an OPM-2 cell viability assay, and a Ki value of 0.061 nM in Mcl-1 HTRF/TR-FRET assay[1].

Mcl-1 inhibitor 3 (oral administration; 3, 10, or 30 mg/kg; 6 hours) causes a significant loss of luminescence (∼40%) over vehicle at 30 mg/kg,This effect was observed with unbound drug levels in plasma, the [plasma]u/OPM-2 IC50 values are 0.24, 0.93 and 3.65 μM in 3, 10, 30 mg/kg doses,respectively[1]. Mcl-1 inhibitor 3 (oral administration; 10, 30, or 60 mg/kg; 6 hours) activates Bak by 8-fold at 30 mg/kg and by 14-fold at 60 mg/kg in this OPM-2 Luc assay,this test is based on the detection of activated Bak in nude mice subcutaneously injected with via electrochemiluminescence.[1]. Mcl-1 inhibitor 3 (oral administration; 10, 30, or 60 mg/kg; 30 days) led to a robust dose-dependent tumor growth inhibition at 30 mg/kg (44% TGI) and 34% tumor regression when the animals were dosed at 60 mg/kg.Lastly, no body weight loss is observed in any of the mice in this study efficacy models[1]. Animal Model: Nude miceinjected with HEK293 cells[1] Dosage: 3, 10, or 30 mg/kg Administration: Oral administration Result: Showed a disruption of the Mcl-1/Bak interaction in this in vivo model. Animal Model: Nude mice injected with human OPM-2 multiple myeloma tumor cells[1] Dosage: 10, 30, or 60 mg/kg Administration: Oral administration Result: Exhibited a inhibition of tumor growth without any toxicity.

[1]. Rescourio G, Discovery and in Vivo Evaluation of Macrocyclic Mcl-1 Inhibitors Featuring an α-Hydroxy Phenylacetic Acid Pharmacophore or Bioisostere.J Med Chem. 2019 Nov 27;62(22):10258-10271.