TELAGLENASTAT (CB-839) IN MONOTHERAPY AND IN COMBINATION WITH EPIGENETIC MODULATORS OR IBRUTINIB INDUCES CELL DEATH IN CHRONIC LYMPHOCYTIC LEUKEMIA CELLS (EHA 2023)
Aims: This work investigated the therapeutic potential of Telaglenastat (CB-839), a glutaminase inhibitor, in a CLL cell line, in monotherapy and in therapeutic association with epigenetic modulators - the hypomethylating agents, azacytidine (AZA) and decitabine (DAC), and the histone deacetylates inhibitors, vorinostat (SAHA), and panobinostat (PANO) and with the BTK inhibitor, ibrutinib (IBRU). CB-839 reduced the metabolic activity of HG3 cells in a dose and time-dependent manner (IC 25 : 5nM, IC 50 : 25nM, 48h). Combinations of this glutaminase inhibitor with epigenetic modulators also reduced the metabolic activity (p<0.001), being the synergistic effect of the drug combination more significant with hypomethylating agents (AZA and DAC) and with IBRU. CB-839 induced cytotoxic and cytostatic effects, simultaneously by induced apoptosis and cell cycle arrest in the G0/G1 phase.