Author:
Birsen Rudy,Larrue Clement,Decroocq Justine,Johnson Natacha,Guiraud Nathan,Gotanegre Mathilde,Cantero-Aguilar Lilia,Grignano Eric,Huynh Tony,Fontenay Michaela,Kosmider Olivier,Mayeux Patrick,Chapuis Nicolas,Sarry Jean Emmanuel,Tamburini Jerome,Bouscary Didier
Abstract
APR-246 is a promising new therapeutic agent that targets p53 mutated proteins in myelodysplastic syndromes and in acute myeloid leukemia (AML). APR-246 reactivates the transcriptional activity of p53 mutants by facilitating their binding to DNA target sites. Recent studies in solid cancers have found that APR-246 can also induce p53-independent cell death. In this study, we demonstrate that AML cell death occurring early after APR-246 exposure is suppressed by iron chelators, lipophilic antioxidants and inhibitors of lipid peroxidation, and correlates with the accumulation of markers of lipid peroxidation, thus fulfilling the definition of ferroptosis, a recently described cell death process. The capacity of AML cells to detoxify lipid peroxides by increasing their cystine uptake to maintain major antioxidant molecule glutathione biosynthesis after exposure to APR-246 may be a key determinant of sensitivity to this compound. The association of APR-246 with induction of ferroptosis (either by pharmacological compounds, or genetic inactivation of SLC7A11 or GPX4) had a synergistic effect on the promotion of cell death, both in vivo and ex vivo.
Publisher
Ferrata Storti Foundation (Haematologica)
Cited by
95 articles.
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