Table 1 Overview of existing/ongoing clinical developments.

From: Mitochondrial metabolism as a potential therapeutic target in myeloid leukaemia

Compounds

Mechanism of Action

Clinical Trial Results

References

Venetoclax

Selectively inhibits BCL-2 protein

Phase 1b/2 trials of venetoclax plus a hypomethylating agent therapy showed tolerable and promising clinical activity, over 60 trials are currently ongoing

[34, 36]

Biguanides

Inhibits the ETC complex I and the glycerol phosphate shuttle

Metformin trial in ALL relapsed patients showed a protective effect, however only high concentrations found effective in in vitro studies raising safety concerns for lactic acidosis, and phenformin trial in melanoma is currently in progress

[140, 145]

Tigecycline

Inhibits the synthesis of mitochondrial ETC complex subunits encoded by mtDNA

Phase I trial on relapsed/refracted AML patients showed satisfactory safety profile, but unsuccessful clinical benefits of tigecycline

[150]

IACS-010759

Inhibits activity of ETC complex I

Satisfactory efficacy in in vivo AML and glioma models, however reported increased serum lactate levels and currently phase I trials on relapsed/refractory AML in progress

[68, 150]

CPI-613

Deactivates PDH and prevents the entry of acetyl-CoA into TCA cycle

Phase I trials undergone in relapsed/refractory AML patients with CPI-613 alone and in combination with cytarabine with promising results in the combination treatment, phase II trial currently ongoing

[151, 154]

CB-839

Inhibits glutaminolysis by targeting GLS

Pre-clinical data were positive and phase I trial in AML and phase II trial on advance myelodysplastic malignancies are currently ongoing

[155]

Enasidenib

Inhibits the decarboxylation of isocitrate by inhibiting IDH2

Phase I and II trials revealed enasidenib to be tolerable and to induce haematologic responses in relapsed/refractory mutant-IDH2 AML, phase III is ongoing

[13]

  1. GLS glutaminase, IDH2 isocitrate dehydrogenase, mtDNA mitochondrial DNA, PDH pyruvate dehydrogenase.