Tumor acidosis-induced DNA damage response and tetraploidy enhance sensitivity to ATM and ATR inhibitors.
Fiche publication
Date publication
février 2024
Journal
EMBO reports
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BOIDOT Romain
Tous les auteurs :
Aubert L, Bastien E, Renoult O, Guilbaud C, Özkan K, Brusa D, Bouzin C, Richiardone E, Richard C, Boidot R, Léonard D, Corbet C, Feron O
Lien Pubmed
Résumé
Tumor acidosis is associated with increased invasiveness and drug resistance. Here, we take an unbiased approach to identify vulnerabilities of acid-exposed cancer cells by combining pH-dependent flow cytometry cell sorting from 3D colorectal tumor spheroids and transcriptomic profiling. Besides metabolic rewiring, we identify an increase in tetraploid cell frequency and DNA damage response as consistent hallmarks of acid-exposed cancer cells, supported by the activation of ATM and ATR signaling pathways. We find that regardless of the cell replication error status, both ATM and ATR inhibitors exert preferential growth inhibitory effects on acid-exposed cancer cells. The efficacy of a combination of these drugs with 5-FU is further documented in 3D spheroids as well as in patient-derived colorectal tumor organoids. These data position tumor acidosis as a revelator of the therapeutic potential of DNA repair blockers and as an attractive clinical biomarker to predict the response to a combination with chemotherapy.
Mots clés
3D Spheroids, ATM, DNA Damage Response, Organoids, Tumor Acidosis
Référence
EMBO Rep. 2024 02 16;: