Table 1 Binding affinity of compounds 1, 2, and ABBV-467 to BCL-2 family proteins, and cellular activity of ABBV-467 and other clinical-stage MCL-1 inhibitors in human tumor cell lines.

From: Selective MCL-1 inhibitor ABBV-467 is efficacious in tumor models but is associated with cardiac troponin increases in patients

 

TR-FRET, Ki, nM

 

MCL-1

BCL-2

BCL-XL

BCL-W

BCL2-A1

Binding affinity

1 (MIK665)

<0.01

599

>660

>468

>468

2

5.54

>1200

>660

NT

NT

ABBV-467

<0.01

>642

>376

>247

>402

 

AMO-1

EC50 (nM, 10% FBS)

H929

EC50 (nM, 10% FBS)

MV4-11

EC50 (nM, 10% FBS)

DLD-1

EC50 (nM, 10% FBS)

Cellular activity

ABBV-467

0.16

0.47

3.91

>10,000

MIK665

2.06

4.75

10.87

4750

AMG 176

90.6

195

106

>10,000

AZD5991

22.9

31.7

34.9

>10,000

AMG 397

13.5

13.0

43.6

>10,000

  1. Data are representative of the mean of at least 3 independent experiments. The impact on cell viability was determined by CellTiter-Glo® after 24 h of continuous treatment (see “Methods”).
  2. BCL-2 B-cell lymphoma 2, EC50 half maximal effective concentration; FBS fetal bovine serum, Ki dissociation constant, NT not tested, TR-FRET time-resolved fluorescence resonance energy transfer.