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pubmed:abstractText |
Aminopeptidase enzyme inhibition is thought to deplete the free intracellular amino acids needed by malignant cells for growth and development, resulting in profound anti-proliferative and apoptotic effects. In this study, we investigated the effects of the metalloenzyme-inhibitor CHR-2797 (tosedostat), in primary acute myeloid leukemia (AML) cells. CHR-2797 demonstrated marked in vitro cytotoxicity in AML samples and strong synergy with Cytarabine (Ara-C), but significantly less cytotoxicity to normal marrow progenitors. Furthermore mechanistic investigations revealed that CHR-2797 inhibited the intrinsic nuclear, cytoplasmic and cell surface aminopeptidase function of AML blasts in a dose-dependent manner, demonstrating a promising novel approach for AML therapy.
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