Abstract:
:The tumor suppressor gene TP53 is the most frequently mutated gene in cancer. The compound APR-246 (PRIMA-1Met/Eprenetapopt) is converted to methylene quinuclidinone (MQ) that targets mutant p53 protein and perturbs cellular antioxidant balance. APR-246 is currently tested in a phase III clinical trial in myelodysplastic syndrome (MDS). By in vitro, ex vivo, and in vivo models, we show that combined treatment with APR-246 and inhibitors of efflux pump MRP1/ABCC1 results in synergistic tumor cell death, which is more pronounced in TP53 mutant cells. This is associated with altered cellular thiol status and increased intracellular glutathione-conjugated MQ (GS-MQ). Due to the reversibility of MQ conjugation, GS-MQ forms an intracellular drug reservoir that increases availability of MQ for targeting mutant p53. Our study shows that redox homeostasis is a critical determinant of the response to mutant p53-targeted cancer therapy.
journal_name
EMBO Mol Medjournal_title
EMBO molecular medicineauthors
Ceder S,Eriksson SE,Cheteh EH,Dawar S,Corrales Benitez M,Bykov VJN,Fujihara KM,Grandin M,Li X,Ramm S,Behrenbruch C,Simpson KJ,Hollande F,Abrahmsen L,Clemons NJ,Wiman KGdoi
10.15252/emmm.201910852subject
Has Abstractpub_date
2020-12-14 00:00:00pages
e10852eissn
1757-4676issn
1757-4684pub_type
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