Article (Périodiques scientifiques)
Cystathionine-γ-lyase drives antioxidant defense in cysteine-restricted IDH1-mutant astrocytomas.
Cano-Galiano, Andrés; Oudin, Anais; Fack, Fred et al.
2024In Neuro-Oncology Advances, 3 (1), p. 057
Peer reviewed vérifié par ORBi
 

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Mots-clés :
IDH mutation; antioxidant defense; cysteine; glioma; glutathione; transsulfuration pathway
Résumé :
[en] BACKGROUND: Mutations in isocitrate dehydrogenase 1 or 2 (IDH1/2) define glioma subtypes and are considered primary events in gliomagenesis, impacting tumor epigenetics and metabolism. IDH enzyme activity is crucial for the generation of reducing potential in normal cells, yet the impact of the mutation on the cellular antioxidant system in glioma is not understood. The aim of this study was to determine how glutathione (GSH), the main antioxidant in the brain, is maintained in IDH1-mutant gliomas, despite an altered NADPH/NADP balance. METHODS: Proteomics, metabolomics, metabolic tracer studies, genetic silencing, and drug targeting approaches in vitro and in vivo were applied. Analyses were done in clinical specimen of different glioma subtypes, in glioma patient-derived cell lines carrying the endogenous IDH1 mutation and corresponding orthotopic xenografts in mice. RESULTS: We find that cystathionine-γ-lyase (CSE), the enzyme responsible for cysteine production upstream of GSH biosynthesis, is specifically upregulated in IDH1-mutant astrocytomas. CSE inhibition sensitized these cells to cysteine depletion, an effect not observed in IDH1 wild-type gliomas. This correlated with an increase in reactive oxygen species and reduced GSH synthesis. Propargylglycine (PAG), a brain-penetrant drug specifically targeting CSE, led to delayed tumor growth in mice. CONCLUSIONS: We show that IDH1-mutant astrocytic gliomas critically rely on NADPH-independent de novo GSH synthesis via CSE to maintain the antioxidant defense, which highlights a novel metabolic vulnerability that may be therapeutically exploited.
Disciplines :
Oncologie
Auteur, co-auteur :
Cano-Galiano, Andrés;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Oudin, Anais;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Fack, Fred;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Allega, Maria-Francesca;  Cancer Research UK Beatson Institute, Glasgow, UK. ; Institute of Cancer Sciences, University of Glasgow, Glasgow, UK.
Sumpton, David;  Cancer Research UK Beatson Institute, Glasgow, UK.
Martinez-Garcia, Elena;  Quantitative Biology Unit, Luxembourg Institute of Health, Luxembourg, Luxembourg.
DITTMAR, Gunnar ;  Quantitative Biology Unit, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Hau, Ann-Christin;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
De Falco, Alfonso;  National Center of Genetics, Laboratoire national de santé, Dudelange, Luxembourg.
Herold-Mende, Christel;  Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany.
Bjerkvig, Rolf;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg. ; Department of Biomedicine, University of Bergen, Bergen, Norway.
MEISER, Johannes ;  Cancer Metabolism Group, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Tardito, Saverio;  Cancer Research UK Beatson Institute, Glasgow, UK. ; Institute of Cancer Sciences, University of Glasgow, Glasgow, UK.
NICLOU, Simone P.  ;  NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg. ; Department of Biomedicine, University of Bergen, Bergen, Norway.
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Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Cystathionine-γ-lyase drives antioxidant defense in cysteine-restricted IDH1-mutant astrocytomas.
Date de publication/diffusion :
2024
Titre du périodique :
Neuro-Oncology Advances
eISSN :
2632-2498
Maison d'édition :
Oxford University Press, Royaume-Uni
Volume/Tome :
3
Fascicule/Saison :
1
Pagination :
vdab057
Peer reviewed :
Peer reviewed vérifié par ORBi
N° du Fonds :
23982/CRUK_/Cancer Research UK/United Kingdom
Commentaire :
© The Author(s) 2021. Published by Oxford University Press, the Society for Neuro-Oncology and the European Association of Neuro-Oncology.
Disponible sur ORBilu :
depuis le 26 février 2024

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