Effects of ABT-737 and Purvalanol A treatments
on pediatric acute
myeloid leukemia cell lines as separate and combined treatments. (A)
MV4-11, MOLM-13, and MOLM-14 cells were treated for 72 h with 50 nM
ABT-737 or 1.3 μM Purvalanol A, as single or mixed drug treatments,
prior to assessment of cell viability by CellTiter-Glo. (B) Combination
index (CI) values obtained after a 72 h drug cotreatment for each
fraction of cells affected by the combination (Fa). CI values were
calculated following CellTiter-Glo assay, using the Chou–Talalay
method on CompuSyn software, where CI = 1 indicates an additive combination,
CI > 1 an antagonistic effect, and CI < 1 a synergistic effect.
Figure keys denote ABT-737/Purvalanol A molar ratios. (C) MV4-11,
MOLM-13, and MOLM-14 cells were treated for 72 h with 50 nM ABT-737
or 1.3 μM Purvalanol A, as single or mixed drug treatments,
prior to assessment of caspase 3/7 activity by Caspase 3/7 Glo. (D)
Cell cycle analysis in MV4-11 cells using RNase/PI staining and flow
cytometry upon 24 h of treatment with a range of concentrations of
free ABT-737 or Purvalanol A. Data are presented as mean ± SD, n = 3.