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Keeping RelApse in Chk: molecular mechanisms of Chk1 inhibitor resistance in lymphoma. Biochem J 2022; 479:2345-2349. [DOI: 10.1042/bcj20220461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/24/2022]
Abstract
Chk1 is a member of the DNA damage response pathway, whose loss leads to replication stress and genome instability. Because of its protective role against lethal levels of DNA replication stress, Chk1 has been studied as a valuable and intriguing target for cancer therapy. However, one of the most prominent challenges with this strategy is development of resistance to Chk1 inhibitors, rendering the treatment ineffective. In their recent papers, Hunter and colleagues demonstrate multiple mechanisms by which Chk1 inhibitor resistance can arise in lymphomas. Specifically, this series of papers identify the relationship between dysfunction in NF-κB and the development of Chk1 inhibitor resistance through a loss of Chk1 activity in mouse models of lymphoma. They identify that cells lacking Chk1 activity can compensate for this loss through up-regulation of alternative pathways, such as PI3K/AKT. Finally, this work also identifies a novel role for Claspin, an important Chk1 activator, in female fertility and cancer development, furthering our understanding of how dysfunction in the Claspin/Chk1 signaling pathway affects disease states. These findings improve our understanding of drug resistance in cancer therapy, which has important implications for clinical use of Chk1 inhibitors.
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Hunter JE, Campbell AE, Butterworth JA, Sellier H, Hannaway NL, Luli S, Floudas A, Kenneth NS, Moore AJ, Brownridge PJ, Thomas HD, Coxhead J, Taylor L, Leary P, Hasoon MS, Knight AM, Garrett MD, Collins I, Eyers CE, Perkins ND. Mutation of the RelA(p65) Thr505 phosphosite disrupts the DNA replication stress response leading to CHK1 inhibitor resistance. Biochem J 2022; 479:2087-2113. [PMID: 36240065 PMCID: PMC9704643 DOI: 10.1042/bcj20220089] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 07/22/2022] [Accepted: 08/19/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Jill E. Hunter
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Amy E. Campbell
- Centre for Proteome Research, Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Jacqueline A. Butterworth
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Helene Sellier
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Nicola L. Hannaway
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Saimir Luli
- Newcastle University Clinical and Translational Research Institute, Preclinical In Vivo Imaging, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, U.K
| | - Achilleas Floudas
- Newcastle University Clinical and Translational Research Institute, Preclinical In Vivo Imaging, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, U.K
| | - Niall S. Kenneth
- Department of Molecular Physiology and Cell Signalling, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Adam J. Moore
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Philip J. Brownridge
- Centre for Proteome Research, Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Huw D. Thomas
- Newcastle University Clinical and Translational Research Institute, Preclinical In Vivo Imaging, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, U.K
| | - Jonathan Coxhead
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Leigh Taylor
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
| | - Peter Leary
- Department of Molecular Physiology and Cell Signalling, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Megan S.R. Hasoon
- Department of Molecular Physiology and Cell Signalling, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Andrew M. Knight
- Newcastle University Clinical and Translational Research Institute, Preclinical In Vivo Imaging, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, U.K
| | - Michelle D. Garrett
- School of Biosciences, University of Kent, Stacey Building, Canterbury, Kent CT2 7NJ, U.K
| | - Ian Collins
- Division of Cancer Therapeutics, The Institute of Cancer Research, Sutton SM2 5NG, U.K
| | - Claire E. Eyers
- Centre for Proteome Research, Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Neil D. Perkins
- Newcastle University Biosciences Institute, Wolfson Childhood Cancer Research Centre, Newcastle University, Herschel Building, Level 6, Brewery Lane, Newcastle upon Tyne NE1 7RU, U.K
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