CHK1 as a therapeutic target to bypass chemoresistance in AML
Abstract
The nucleoside analog cytarabine, an inhibitor of DNA replication fork progression that results in DNA damage, is currently used in the treatment of acute myeloid leukemia (AML). We explored the prognostic value of the expression of 72 genes involved in various aspects of DNA replication in a set of 198 AML patients treated by cytarabine-based chemotherapy. We unveiled that high expression of the DNA replication checkpoint gene CHEK1 is a prognostic marker associated with shorter overall, event-free, and relapse-free survivals and determined that the expression of CHEK1 can predict more frequent and earlier postremission relapse. CHEK1 encodes checkpoint kinase 1 (CHK1), which is activated by the kinase ATR when DNA replication is impaired by DNA damage. High abundance of CHK1 in AML patient cells correlated with higher clonogenic ability and more efficient DNA replication fork progression upon cytarabine treatment. Exposing the patient cells with the high abundance of CHK1 to SCH900776, an inhibitor of the kinase activity of CHK1, reduced clonogenic ability and progression of DNA replication in the presence of cytarabine. These results indicated that some AML cells rely on an efficient CHK1-mediated replication stress response for viability and that therapeutic strategies that inhibit CHK1 could extend current cytarabine-based treatments and overcome drug resistance. Furthermore, monitoring CHEK1 expression could be used both as a predictor of outcome and as a marker to select AML patients for CHK1 inhibitor treatments.
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High CHK1 expression in AML is a marker of poor prognosis and resistance to cytarabine treatment.
“Recently, David and collaborators demonstrated that high CHK1 expression in AML is a marker of poor prognosis and resistance to cytarabine treatment.”
From The Spi1/PU.1 transcription factor accelerates replication fork progression by increasing PP1 phosphatase in leukemia (2017) · cites this paper as [42]
CHK1 inhibitors abolish cytarabine resistance and reduce the speed of fork progression in response to cytarabine.
“In that case, CHK1 inhibitors abolish cytarabine resistance and reduce the speed of fork progression in response to cytarabine [42].”
From The Spi1/PU.1 transcription factor accelerates replication fork progression by increasing PP1 phosphatase in leukemia (2017) · cites this paper as [42]
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“In that case, CHK1 inhibitors abolish cytarabine resistance and reduce the speed of fork progression in response to cytarabine [42].”
Background
- Authors
- David, L., Fernandez-Vidal, A., Bertoli, S., Grgurevic, S., Lepage, B., Deshaies, D., Prade, N., Cartel, M., Larrue, C., Sarry, J.-E., Delabesse, E., Cazaux, C., Didier, C., Récher, C., Manenti, S., & Hoffmann, J.-S.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Equipe Labellisée, La Ligue Contre Le Cancer, Toulouse, France.
- Université Toulouse III - Paul Sabatier (FR)
- Centre Hospitalier Universitaire de Toulouse (FR)
- Institut universitaire du cancer de Toulouse Oncopole (FR)
- Laboratoire d’Excellence Toulouse Cancer Labex TOUCAN, Cancer Research Center of Toulouse, Inserm U1037, CNRS ERL5294, Toulouse, France.
- Corresponding author
- David, Laure
- Fernandez-Vidal, Anne
- Récher, Christian
- Manenti, Stéphane
- Hoffmann, Jean-Sébastien
- ORCID
- Venue
- Science Signaling
- Published
- 2016-09-13
- Volume
- 9
- Issue
- 445
- Pages
- ra90-ra90
- ISSN
- 1937-9145 (ISSN-L)
- 1945-0877
- OpenAlex
- W2519866904
- Cited by
- 76
- References
- 39
- Citations by year
- 2026: 4 · 2025: 2 · 2024: 5 · 2023: 8 · 2022: 8 · 2021: 13 · 2020: 10 · 2019: 7 · 2018: 7 · 2017: 11 · 2016: 1
- FWCI
- 8.25
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science Signaling (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Funders
- La Ligue Nationale contre le Cancer
- Ligue Regionale Midi-Pyrenees 2014
- Laboratoire d'Excellence Toulouse Cancer Labex TOUCAN
- Toulouse Cancer Sante Foundation
- Canceropole Grand Sud-Ouest
- La Fondation de France
- Topics
- Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
- Keywords
- Chk1, acute myeloid leukemia, cytarabine, chemoresistance, DNA replication checkpoint, ATR kinase, CHK1 inhibitor, prognostic factors, replication stress response, clonogenicity, DNA replication fork progression
- MeSH terms
- Checkpoint Kinase 1, Cytarabine, DNA Replication, Female, Humans, Male, Neoplasm Proteins, Pyrazoles, Pyrimidines, Leukemia, Myeloid, Acute, Drug Resistance, Neoplasm
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