1
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Coulson-Gilmer C, Littler S, Barnes B, Brady R, Anagho H, Pillay N, Dey M, Macmorland W, Bronder D, Nelson L, Tighe A, Lin WH, Morgan R, Unwin R, Nielsen M, McGrail J, Taylor S. Intrinsic PARG inhibitor sensitivity is mimicked by TIMELESS haploinsufficiency and rescued by nucleoside supplementation. NAR Cancer 2024; 6:zcae030. [PMID: 39015544 PMCID: PMC11249981 DOI: 10.1093/narcan/zcae030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 06/20/2024] [Accepted: 06/26/2024] [Indexed: 07/18/2024] Open
Abstract
A subset of cancer cells are intrinsically sensitive to inhibitors targeting PARG, the poly(ADP-ribose) glycohydrolase that degrades PAR chains. Sensitivity is accompanied by persistent DNA replication stress, and can be induced by inhibition of TIMELESS, a replisome accelerator. However, the nature of the vulnerability responsible for intrinsic sensitivity remains undetermined. To understand PARG activity dependency, we analysed Timeless model systems and intrinsically sensitive ovarian cancer cells. We show that nucleoside supplementation rescues all phenotypes associated with PARG inhibitor sensitivity, including replisome speed and fork stalling, S-phase completion and mitotic entry, proliferation dynamics and clonogenic potential. Importantly nucleoside supplementation restores PARG inhibitor resistance despite the continued presence of PAR chains, indicating that sensitivity does not correlate with PAR levels. In addition, we show that inhibition of thymidylate synthase, an enzyme required for dNTP homeostasis, induces PARG-dependency. Together, these observations suggest that PARG inhibitor sensitivity reflects an inability to control replisome speed and/or maintain helicase-polymerase coupling in response to nucleotide imbalances.
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Affiliation(s)
- Camilla Coulson-Gilmer
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Samantha Littler
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Bethany M Barnes
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Rosie M Brady
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Holda A Anagho
- Proteomics program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Nisha Pillay
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Malini Dey
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - William Macmorland
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Daniel Bronder
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Louisa Nelson
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Anthony Tighe
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Wei-Hsiang Lin
- Genome Editing Unit, Faculty of Biology, Medicine and Health, University of Manchester, Michael Smith Building, Dover Street, Manchester M13 9PT, UK
| | - Robert D Morgan
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
- Department of Medical Oncology, The Christie NHS Foundation Trust, Wilmslow Rd, Manchester M20 4BX, UK
| | - Richard D Unwin
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Michael L Nielsen
- Proteomics program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Joanne C McGrail
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
| | - Stephen S Taylor
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre (MAHSC), Manchester Cancer Research Centre, Wilmslow Road, Manchester M20 4GJ, UK
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2
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Lu Y, Fu W, Xing W, Wu H, Zhang C, Xu D. Transcriptional regulation mechanism of PARP1 and its application in disease treatment. Epigenetics Chromatin 2024; 17:26. [PMID: 39118189 PMCID: PMC11308664 DOI: 10.1186/s13072-024-00550-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024] Open
Abstract
Poly (ADP-ribose) polymerase 1 (PARP1) is a multifunctional nuclear enzyme that catalyzes poly-ADP ribosylation in eukaryotic cells. In addition to maintaining genomic integrity, this nuclear enzyme is also involved in transcriptional regulation. PARP1 can trigger and maintain changes in the chromatin structure and directly recruit transcription factors. PARP1 also prevents DNA methylation. However, most previous reviews on PARP1 have focused on its involvement in maintaining genome integrity, with less focus on its transcriptional regulatory function. This article comprehensively reviews the transcriptional regulatory function of PARP1 and its application in disease treatment, providing new ideas for targeting PARP1 for the treatment of diseases other than cancer.
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Affiliation(s)
- Yu Lu
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China
- Hebei University, Baoding, Hebei, P.R. China
| | - Wenliang Fu
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China
| | - Weiwei Xing
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China
| | - Haowei Wu
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China
| | - Chao Zhang
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China.
| | - Donggang Xu
- Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Beijing, 100850, P.R. China.
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3
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Sun Y, Patterson-Fortin J, Han S, Li Z, Nowicka Z, Hirohashi Y, Kilgas S, Yi JK, Spektor A, Fendler W, Konstantinopoulos PA, Chowdhury D. 53BP1 loss elicits cGAS-STING-dependent antitumor immunity in ovarian and pancreatic cancer. Nat Commun 2024; 15:6676. [PMID: 39107288 PMCID: PMC11303708 DOI: 10.1038/s41467-024-50999-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 07/29/2024] [Indexed: 08/10/2024] Open
Abstract
53BP1 nucleates the anti-end resection machinery at DNA double-strand breaks, thereby countering BRCA1 activity. Loss of 53BP1 leads to DNA end processing and homologous recombination in BRCA1-deficient cells. Consequently, BRCA1-mutant tumors, typically sensitive to PARP inhibitors (PARPi), become resistant in the absence of 53BP1. Here, we demonstrate that the 'leaky' DNA end resection in the absence of 53BP1 results in increased micronuclei and cytoplasmic double-stranded DNA, leading to activation of the cGAS-STING pathway and pro-inflammatory signaling. This enhances CD8+ T cell infiltration, activates macrophages and natural killer cells, and impedes tumor growth. Loss of 53BP1 correlates with a response to immune checkpoint blockade (ICB) and improved overall survival. Immunohistochemical assessment of 53BP1 in two malignancies, high grade serous ovarian cancer and pancreatic ductal adenocarcinoma, which are refractory to ICBs, reveals that lower 53BP1 levels correlate with an increased adaptive and innate immune response. Finally, BRCA1-deficient tumors that develop resistance to PARPi due to the loss of 53BP1 are susceptible to ICB. Therefore, we conclude that 53BP1 is critical for tumor immunogenicity and underpins the response to ICB. Our results support including 53BP1 expression as an exploratory biomarker in ICB trials for malignancies typically refractory to immunotherapy.
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MESH Headings
- Tumor Suppressor p53-Binding Protein 1/metabolism
- Tumor Suppressor p53-Binding Protein 1/genetics
- Female
- Nucleotidyltransferases/metabolism
- Nucleotidyltransferases/genetics
- Membrane Proteins/metabolism
- Membrane Proteins/genetics
- Humans
- Animals
- Ovarian Neoplasms/immunology
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/pathology
- Ovarian Neoplasms/metabolism
- Pancreatic Neoplasms/immunology
- Pancreatic Neoplasms/genetics
- Pancreatic Neoplasms/pathology
- Pancreatic Neoplasms/metabolism
- Mice
- Cell Line, Tumor
- DNA Breaks, Double-Stranded
- BRCA1 Protein/metabolism
- BRCA1 Protein/genetics
- Signal Transduction
- CD8-Positive T-Lymphocytes/immunology
- Immune Checkpoint Inhibitors/therapeutic use
- Immune Checkpoint Inhibitors/pharmacology
- Poly(ADP-ribose) Polymerase Inhibitors/pharmacology
- Poly(ADP-ribose) Polymerase Inhibitors/therapeutic use
- Mice, Inbred C57BL
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Mice, Knockout
- Carcinoma, Pancreatic Ductal/immunology
- Carcinoma, Pancreatic Ductal/genetics
- Carcinoma, Pancreatic Ductal/pathology
- Immunity, Innate
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Affiliation(s)
- Yajie Sun
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Jeffrey Patterson-Fortin
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Sen Han
- Division of Genetics, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Zhe Li
- Division of Genetics, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Zuzanna Nowicka
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, Lodz, Poland
| | - Yuna Hirohashi
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Susan Kilgas
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Jae Kyo Yi
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Alexander Spektor
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Wojciech Fendler
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, Lodz, Poland
- Center for DNA Damage and Repair, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | | | - Dipanjan Chowdhury
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
- Broad Institute of Harvard and MIT, Cambridge, MA, USA.
- Department of Biological Chemistry & Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
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4
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Bhandari SK, Wiest N, Sallmyr A, Du R, Tomkinson AE. Redundant but essential functions of PARP1 and PARP2 in DNA ligase I-independent DNA replication. Nucleic Acids Res 2024:gkae672. [PMID: 39106163 DOI: 10.1093/nar/gkae672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 07/18/2024] [Accepted: 07/23/2024] [Indexed: 08/09/2024] Open
Abstract
While DNA ligase I (LigI) joins most Okazaki fragments, a backup pathway involving poly(ADP-ribose) synthesis, XRCC1 and DNA ligase IIIα (LigIIIα) functions along with the LigI-dependent pathway and is also capable of supporting DNA replication in the absence of LigI. Here we have addressed for the first time the roles of PARP1 and PARP2 in this pathway using isogenic null derivatives of mouse CH12F3 cells. While single and double null mutants of the parental cell line and single mutants of LIG1 null cells were viable, loss of both PARP1 and PARP2 was synthetically lethal with LigI deficiency. Thus, PARP1 and PARP2 have a redundant essential role in LigI-deficient cells. Interestingly, higher levels of PARP2 but not PARP1 associated with newly synthesized DNA in the LIG1 null cells and there was a much higher increase in PARP2 chromatin retention in LIG1 null cells incubated with the PARP inhibitor olaparib with this effect occurring independently of PARP1. Together our results suggest that PARP2 plays a major role in specific cell types that are more dependent upon the backup pathway to complete DNA replication and that PARP2 retention at unligated Okazaki fragments likely contributes to the side effects of current clinical PARP inhibitors.
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Affiliation(s)
- Seema Khattri Bhandari
- Cancer Research Facility, Departments of Internal Medicine and Molecular Genetics & Microbiology, University of New Mexico Comprehensive Cancer Center, University of New Mexico Health Sciences Center, 915 Camino de Salud, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Nathaniel Wiest
- Cancer Research Facility, Departments of Internal Medicine and Molecular Genetics & Microbiology, University of New Mexico Comprehensive Cancer Center, University of New Mexico Health Sciences Center, 915 Camino de Salud, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Annahita Sallmyr
- Cancer Research Facility, Departments of Internal Medicine and Molecular Genetics & Microbiology, University of New Mexico Comprehensive Cancer Center, University of New Mexico Health Sciences Center, 915 Camino de Salud, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Ruofei Du
- Cancer Research Facility, Departments of Internal Medicine and Molecular Genetics & Microbiology, University of New Mexico Comprehensive Cancer Center, University of New Mexico Health Sciences Center, 915 Camino de Salud, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Alan E Tomkinson
- Cancer Research Facility, Departments of Internal Medicine and Molecular Genetics & Microbiology, University of New Mexico Comprehensive Cancer Center, University of New Mexico Health Sciences Center, 915 Camino de Salud, 1 University of New Mexico, Albuquerque, NM 87131, USA
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5
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Das PK, Matada GSP, Pal R, Maji L, Dhiwar PS, Manjushree BV, Viji MP. Poly (ADP-ribose) polymerase (PARP) inhibitors as anticancer agents: An outlook on clinical progress, synthetic strategies, biological activity, and structure-activity relationship. Eur J Med Chem 2024; 274:116535. [PMID: 38838546 DOI: 10.1016/j.ejmech.2024.116535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/20/2024] [Accepted: 05/24/2024] [Indexed: 06/07/2024]
Abstract
Poly (ADP-ribose) polymerase (PARP) is considered an essential component in case of DNA (Deoxyribonucleic acid) damage, response by sensing DNA damage and engaging DNA repair proteins. Those proteins repair the damaged DNA via an aspect of posttranslational modification, known as poly (ADP-Ribosyl)ation (PARylation). Specifically, PARP inhibitors (PARPi) have shown better results when administered alone in a variety of cancer types with BRCA (Breast Cancer gene) mutation. The clinical therapeutic benefits of PARP inhibitors have been diminished by their cytotoxicity, progression of drug resistance, and limitation of indication, regardless of their tremendous clinical effectiveness. A growing number of PARP-1 inhibitors, particularly those associated with BRCA-1/2 mutations, have been identified as potential cancer treatments. Recently, several researchers have identified various promising scaffolds, which have resulted in the resuscitation of the faith in PARP inhibitors as cancer therapies. This review provided a comprehensive update on the anatomy and physiology of the PARP enzyme, the profile of FDA (Food and Drug Administration) and CFDA (China Food and Drug Administration)-approved drugs, and small-molecule inhibitors of PARP, including their synthetic routes, biological evaluation, selectivity, and structure-activity relationship.
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Affiliation(s)
- Pronoy Kanti Das
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India
| | - Gurubasavaraja Swamy Purawarga Matada
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India.
| | - Rohit Pal
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India.
| | - Lalmohan Maji
- Tarifa Memorial Institute of Pharmacy, Department of Pharmaceutical Chemistry, Murshidabad, 742166, West Bengal, India
| | - Prasad Sanjay Dhiwar
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India
| | - B V Manjushree
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India
| | - M P Viji
- Integrated Drug Discovery Centre, Department of Pharmaceutical Chemistry, Acharya & BM Reddy College of Pharmacy, Bengaluru, 560107, Karnataka, India
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6
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Mohan A, Quingalahua E, Gunchick V, Paul S, Kumar-Sinha C, Crysler O, Zalupski MM, Sahai V. PARP inhibitor therapy in patients with IDH1 mutated cholangiocarcinoma. Oncologist 2024; 29:725-730. [PMID: 39036962 PMCID: PMC11299928 DOI: 10.1093/oncolo/oyae163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 06/06/2024] [Indexed: 07/23/2024] Open
Abstract
BACKGROUND Isocitrate dehydrogenase 1 (IDH1) missense mutations occur at a frequency of 10%-15% in intrahepatic cholangiocarcinoma (iCCA). IDH1 mutations result in accumulation of (R)-2-hydroxyglutarate, an oncometabolite that leads to DNA hypermethylation and impairment of homologous recombination (HR). Impairment of HR results in a "BRCAness" phenotype which may confer sensitivity to poly(ADP ribose) polymerase (PARP) inhibition. METHODS We conducted a retrospective cohort review to identify patients with advanced, IDH1 mutated iCCA treated with a PARP inhibitor (PARPi) at the University of Michigan between 2018 and 2023. Patients are described with respect to prior lines of therapy, response to platinum-based chemotherapy, and progression-free survival (PFS) and overall survival (OS) from the time of PARPi initiation. RESULTS Between 2018 and 2023 we identified 40 patients with IDH1 mutated iCCA of which 6 patients were treated with a PARPi as monotherapy or in combination with an ATR inhibitor or anti-PD-1 immune checkpoint inhibitor. Majority of patients (n = 5) carried an IDH1 R132C mutation per tissue-based next generation sequencing. All patients had previously received at least one line of cisplatin-based systemic therapy for advanced disease prior to treatment with PARPi. PFS and OS from time of PARPi initiation ranged from 1.4 to 18.5 months and 2.8 to 42.4 months, respectively. Best response on PARPi therapy included 2 partial responses. CONCLUSION This is the first case series to describe PARPi treatment in IDH1 mutated iCCA. Results underscore the limitation of PARPi monotherapy, potentially support combined PARPi therapies, and highlight a need for effective treatment options for patients with IDH1 mutated iCCA.
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Affiliation(s)
- Arathi Mohan
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Elit Quingalahua
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Valerie Gunchick
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Simi Paul
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Chandan Kumar-Sinha
- Michigan Center for Translational Pathology, University of Michigan, Ann Arbor, MI, United States
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Oxana Crysler
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Mark M Zalupski
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Vaibhav Sahai
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
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7
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Fábián Z, Kakulidis ES, Hendriks IA, Kühbacher U, Larsen NB, Oliva-Santiago M, Wang J, Leng X, Dirac-Svejstrup AB, Svejstrup JQ, Nielsen ML, Caldecott K, Duxin JP. PARP1-dependent DNA-protein crosslink repair. Nat Commun 2024; 15:6641. [PMID: 39103378 DOI: 10.1038/s41467-024-50912-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 07/25/2024] [Indexed: 08/07/2024] Open
Abstract
DNA-protein crosslinks (DPCs) are toxic lesions that inhibit DNA related processes. Post-translational modifications (PTMs), including SUMOylation and ubiquitylation, play a central role in DPC resolution, but whether other PTMs are also involved remains elusive. Here, we identify a DPC repair pathway orchestrated by poly-ADP-ribosylation (PARylation). Using Xenopus egg extracts, we show that DPCs on single-stranded DNA gaps can be targeted for degradation via a replication-independent mechanism. During this process, DPCs are initially PARylated by PARP1 and subsequently ubiquitylated and degraded by the proteasome. Notably, PARP1-mediated DPC resolution is required for resolving topoisomerase 1-DNA cleavage complexes (TOP1ccs) induced by camptothecin. Using the Flp-nick system, we further reveal that in the absence of PARP1 activity, the TOP1cc-like lesion persists and induces replisome disassembly when encountered by a DNA replication fork. In summary, our work uncovers a PARP1-mediated DPC repair pathway that may underlie the synergistic toxicity between TOP1 poisons and PARP inhibitors.
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Affiliation(s)
- Zita Fábián
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Ellen S Kakulidis
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
- Biotech Research and Innovation Centre, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Ivo A Hendriks
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Ulrike Kühbacher
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Nicolai B Larsen
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Marta Oliva-Santiago
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
- Biotech Research and Innovation Centre, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Junhui Wang
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9RH, UK
| | - Xueyuan Leng
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
- Biotech Research and Innovation Centre, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - A Barbara Dirac-Svejstrup
- Department of Cellular and Molecular Medicine, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Jesper Q Svejstrup
- Department of Cellular and Molecular Medicine, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Michael L Nielsen
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Keith Caldecott
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9RH, UK
| | - Julien P Duxin
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark.
- Biotech Research and Innovation Centre, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark.
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8
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Onji H, Tate S, Sakaue T, Fujiwara K, Nakano S, Kawaida M, Onishi N, Matsumoto T, Yamagami W, Sugiyama T, Higashiyama S, Pommier Y, Kobayashi Y, Murai J. Schlafen 11 further sensitizes BRCA-deficient cells to PARP inhibitors through single-strand DNA gap accumulation behind replication forks. Oncogene 2024; 43:2475-2489. [PMID: 38961202 DOI: 10.1038/s41388-024-03094-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 06/17/2024] [Accepted: 06/26/2024] [Indexed: 07/05/2024]
Abstract
The preferential response to PARP inhibitors (PARPis) in BRCA-deficient and Schlafen 11 (SLFN11)-expressing ovarian cancers has been documented, yet the underlying molecular mechanisms remain unclear. As the accumulation of single-strand DNA (ssDNA) gaps behind replication forks is key for the lethality effect of PARPis, we investigated the combined effects of SLFN11 expression and BRCA deficiency on PARPi sensitivity and ssDNA gap formation in human cancer cells. PARPis increased chromatin-bound RPA2 and ssDNA gaps in SLFN11-expressing cells and even more in cells with BRCA1 or BRCA2 deficiency. SLFN11 was co-localized with chromatin-bound RPA2 under PARPis treatment, with enhanced recruitment in BRCA2-deficient cells. Notably, the chromatin-bound SLFN11 under PARPis did not block replication, contrary to its function under replication stress. SLFN11 recruitment was attenuated by the inactivation of MRE11. Hence, under PARPi treatment, MRE11 expression and BRCA deficiency lead to ssDNA gaps behind replication forks, where SLFN11 binds and increases their accumulation. As ovarian cancer patients who responded (progression-free survival >2 years) to olaparib maintenance therapy had a significantly higher SLFN11-positivity than short-responders (<6 months), our findings provide a mechanistic understanding of the favorable responses to PARPis in SLFN11-expressing and BRCA-deficient tumors. It highlight the clinical implications of SLFN11.
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Affiliation(s)
- Hiroshi Onji
- Department of Obstetrics and Gynecology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Sota Tate
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Toon, Ehime, Japan
| | - Tomohisa Sakaue
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Toon, Ehime, Japan
- Department of Cardiovascular and Thoracic Surgery, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Kohei Fujiwara
- Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Minato-ku, Tokyo, Japan
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan
| | - Shiho Nakano
- Department of Obstetrics and Gynecology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Miho Kawaida
- Division of Diagnostic Pathology, Keio University Hospital, Shinjuku-ku, Tokyo, Japan
| | - Nobuyuki Onishi
- Department of Clinical Diagnostic Oncology, Clinical Research Institute for Clinical Pharmacology and Therapeutics, Showa University, Shinagawa-ku, Tokyo, Japan
- Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Takashi Matsumoto
- Department of Obstetrics and Gynecology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Wataru Yamagami
- Department of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Takashi Sugiyama
- Department of Obstetrics and Gynecology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Shigeki Higashiyama
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Toon, Ehime, Japan
- Department of Oncogenesis and Tumor Regulation, Osaka International Cancer Institute, Chuo-ku, Osaka, Japan
| | - Yves Pommier
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Yusuke Kobayashi
- Department of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
- Department of Obstetrics and Gynecology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Junko Murai
- Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Toon, Ehime, Japan.
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan.
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9
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Barros AG, Mansinho H, Couto N, Teixeira MR, Tonin FS, Francisco R, Duarte-Ramos F. The Initial Journey of Patients with Metastatic Pancreatic Cancer (PaCTO Project): A Nationwide Survey among Portuguese Specialist Physicians. GE PORTUGUESE JOURNAL OF GASTROENTEROLOGY 2024; 31:262-272. [PMID: 39114325 PMCID: PMC11305690 DOI: 10.1159/000533178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/18/2023] [Indexed: 08/10/2024]
Abstract
Introduction We aimed to characterize the initial healthcare journey of metastatic pancreatic ductal adenocarcinoma (mPDAC) patients in Portugal, including healthcare provision and factors affecting therapeutic decisions, namely BRCA mutations testing. Methods This is a descriptive cross-sectional, web-based survey using a convenience sampling approach. Portuguese oncologists and pathologists that routinely work with mPDAC patients from the different geographical regions and settings were invited to participate in the study via email (December 2020). Descriptive statistical analyses were performed, with categorical variables reported as absolute and relative frequencies, and continuous variables with non-normal distribution as median and interquartile range (IQR) (Stata v.15.0). Results Seventy physicians participated in the study (43 oncologists, 27 pathologists). According to the responses, a median of 28 patients per center (IQR 12-70) was diagnosed with PDAC in the previous year; 22 of them referring (IQR 8-70) to mPDAC. The pointed median time from patients' first hospital admission until disease diagnosis/staging is between 2 and 4 weeks. Endoscopic ultrasound with fine-needle biopsy is available in most hospitals (86%). Around 50% of physicians request BRCA testing; the assessment of additional biomarkers besides BRCA is requested by 40% of professionals. Half of them stated that BRCA testing should be requested earlier-upon histological diagnosis, especially because the median time for results is of 4.0 weeks (IQR 4-8). PARP inhibitors such as olaparib, when available, would be the therapy of choice for most oncologists (71%) if no disease' progression occurs after 4 months. Treatments' selection is usually grounded on clinical criteria (e.g., performance status, liver function). Around 45% of patients use FOLFIRINOX/mFOLFIRINOX as the first-line therapy. Gemcitabine + nab-paclitaxel is used by 35% of patients as the second-line therapy. Conclusions Physicians in Portugal support the increasing role of patient-tailored treatments in mPDAC, whose selection should be grounded on tumoral subtyping and molecular profiling. Further efforts to develop multidisciplinary teams, standardized clinical practice, and optimize the implementation of new target therapies are needed.
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Affiliation(s)
- Anabela G. Barros
- Department of Medical Oncology, University Hospital of Coimbra, Coimbra, Portugal
| | - Hélder Mansinho
- Hemato Oncology Department, Garcia de Orta Hospital, Almada, Portugal
| | - Nuno Couto
- Digestive Unit, Champalimaud Clinical Centre, Champalimaud Research Centre, Lisbon, Portugal
| | - Manuel R. Teixeira
- Department of Laboratory Genetics, Portuguese Oncology Institute of Porto (IPO Porto), Porto Comprehensive Cancer Center, Porto, Portugal
- Cancer Genetics Group, IPO Porto Research Center (CI-IPOP)/RISE@CI-IPOP (Health Research Network), School of Medicine and Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal
| | - Fernanda S. Tonin
- Pharmaceutical Sciences Postgraduate Program, Federal University of Parana, Curitiba, Brazil
- H&TRC–Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisbon, Portugal
| | | | - Filipa Duarte-Ramos
- Department of Pharmacy, Pharmacology and Health Technologies, Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
- EPIUnit, Instituto de Saúde Pública da Universidade do Porto (ISPUP), Laboratório para a Investigação Integrativa e Translacional em Saúde Populacional (ITR), Porto, Portugal
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10
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Zhang H, Zha S. The dynamics and regulation of PARP1 and PARP2 in response to DNA damage and during replication. DNA Repair (Amst) 2024; 140:103690. [PMID: 38823186 DOI: 10.1016/j.dnarep.2024.103690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/14/2024] [Accepted: 04/29/2024] [Indexed: 06/03/2024]
Abstract
DNA strand breaks activate Poly(ADP-ribose) polymerase (PARP) 1 and 2, which use NAD+ as the substrate to covalently conjugate ADP-ribose on themselves and other proteins (e.g., Histone) to promote chromatin relaxation and recruit additional DNA repair factors. Enzymatic inhibitors of PARP1 and PARP2 (PARPi) are promising cancer therapy agents that selectively target BRCA1- or BRCA2- deficient cancers. As immediate early responders to DNA strand breaks with robust activities, PARP1 and PARP2 normally form transient foci (<10 minutes) at the micro-irradiation-induced DNA lesions. In addition to enzymatic inhibition, PARPi also extend the presence of PARP1 and PARP2 at DNA lesions, including at replication forks, where they may post a physical block for subsequent repair and DNA replication. The dynamic nature of PARP1 and PARP2 foci made live cell imaging a unique platform to detect subtle changes and the functional interaction among PARP1, PARP2, and their regulators. Recent imaging studies have provided new understandings of the biological consequence of PARP inhibition and uncovered functional interactions between PARP1 and PARP2 and new regulators (e.g., histone poly(ADP-ribosylation) factor). Here, we review recent advances in dissecting the temporal and spatial Regulation of PARP1 and PARP2 at DNA lesions and discuss their physiological implications on both cancer and normal cells.
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Affiliation(s)
- Hanwen Zhang
- Institute for Cancer Genetics, Vagelos College for Physicians and Surgeons, Columbia University, New York City, NY 10032, USA
| | - Shan Zha
- Institute for Cancer Genetics, Vagelos College for Physicians and Surgeons, Columbia University, New York City, NY 10032, USA; Department of Pathology and Cell Biology, Herbert Irvine Comprehensive Cancer Center, Vagelos College for Physicians and Surgeons, Columbia University, New York City, NY 10032, USA; Division of Hematology, Oncology and Stem Cell Transplantation, Department of Pediatrics, Vagelos College for Physicians and Surgeons, Columbia University, New York City, NY 10032, USA; Department of Immunology and Microbiology, Vagelos College for Physicians and Surgeons, Columbia University, New York City, NY 10032, USA.
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11
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Aubuchon LN, Verma P. Endogenous base damage as a driver of genomic instability in homologous recombination-deficient cancers. DNA Repair (Amst) 2024; 141:103736. [PMID: 39096699 DOI: 10.1016/j.dnarep.2024.103736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 07/18/2024] [Accepted: 07/22/2024] [Indexed: 08/05/2024]
Abstract
Homologous recombination (HR) is a high-fidelity DNA double-strand break (DSB) repair pathway. Both familial and somatic loss of function mutation(s) in various HR genes predispose to a variety of cancer types, underscoring the importance of error-free repair of DSBs in human physiology. While environmental sources of DSBs have been known, more recent studies have begun to uncover the role of endogenous base damage in leading to these breaks. Base damage repair intermediates often consist of single-strand breaks, which if left unrepaired, can lead to DSBs as the replication fork encounters these lesions. This review summarizes various sources of endogenous base damage and how these lesions are repaired. We highlight how conversion of base repair intermediates, particularly those with 5'or 3' blocked ends, to DSBs can be a predominant source of genomic instability in HR-deficient cancers. We also discuss how endogenous base damage and ensuing DSBs can be exploited to enhance the efficacy of Poly (ADP-ribose) polymerase inhibitors (PARPi), that are widely used in the clinics for the regimen of HR-deficient cancers.
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Affiliation(s)
- Lindsey N Aubuchon
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO 63110, USA; Cancer Biology Graduate Program, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Priyanka Verma
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO 63110, USA; Cancer Biology Graduate Program, Washington University School of Medicine, St. Louis, MO 63110, USA.
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12
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Piha-Paul SA, Tseng C, Leung CH, Yuan Y, Karp DD, Subbiah V, Hong D, Fu S, Naing A, Rodon J, Javle M, Ajani JA, Raghav KP, Somaiah N, Mills GB, Tsimberidou AM, Zheng X, Chen K, Meric-Bernstam F. Phase II study of talazoparib in advanced cancers with BRCA1/2, DNA repair, and PTEN alterations. NPJ Precis Oncol 2024; 8:166. [PMID: 39085400 PMCID: PMC11291882 DOI: 10.1038/s41698-024-00634-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 07/09/2024] [Indexed: 08/02/2024] Open
Abstract
Cancer cells with BRCA1/2 deficiencies are sensitive to poly (ADP-ribose) polymerase (PARP) inhibitors. We evaluated the efficacy of talazoparib in DNA-Damage Repair (DDR)-altered patients. In this phase II trial, patients were enrolled onto one of four cohorts based on molecular alterations: (1) somatic BRCA1/2, (2) other homologous recombination repair pathway, (3) PTEN and (4) germline BRCA1/2. The primary endpoint was a clinical benefit rate (CBR): complete response, partial response or stable disease ≥24 weeks. 79 patients with a median of 4 lines of therapy were enrolled. CBR for cohorts 1-4 were: 32.5%, 19.7%, 9.4% and 30.6%, respectively. PTEN mutations correlated with reduced survival and a trend towards shorter time to progression.Talazoparib demonstrated clinical benefit in selected DDR-altered patients. PTEN mutations/loss patients derived limited clinical benefit. Further study is needed to determine whether PTEN is prognostic or predictive of response to PARP inhibitors.
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Affiliation(s)
- Sarina A Piha-Paul
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - Chieh Tseng
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cheuk Hong Leung
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ying Yuan
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Daniel D Karp
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Vivek Subbiah
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - David Hong
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Siqing Fu
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Aung Naing
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jordi Rodon
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Milind Javle
- Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jaffer A Ajani
- Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kanwal P Raghav
- Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Neeta Somaiah
- Department of Sarcoma Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gordon B Mills
- Knight Cancer Institute, Oregon Health Sciences University, Portland, OR, USA
| | - Apostolia M Tsimberidou
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaofeng Zheng
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ken Chen
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Funda Meric-Bernstam
- Department of Investigational Cancer Therapeutics (A Phase I Clinical Trials Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Breast Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- The Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, University of Texas MD Anderson Cancer Center, Houston, TX, USA
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13
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Ramakrishnan N, Weaver TM, Aubuchon LN, Woldegerima A, Just T, Song K, Vindigni A, Freudenthal BD, Verma P. Nucleolytic processing of abasic sites underlies PARP inhibitor hypersensitivity in ALC1-deficient BRCA mutant cancer cells. Nat Commun 2024; 15:6343. [PMID: 39068174 PMCID: PMC11283519 DOI: 10.1038/s41467-024-50673-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 07/17/2024] [Indexed: 07/30/2024] Open
Abstract
Clinical success with poly (ADP-ribose) polymerase inhibitors (PARPi) is impeded by inevitable resistance and associated cytotoxicity. Depletion of Amplified in Liver Cancer 1 (ALC1), a chromatin-remodeling enzyme, can overcome these limitations by hypersensitizing BReast CAncer genes 1/2 (BRCA1/2) mutant cells to PARPi. Here, we demonstrate that PARPi hypersensitivity upon ALC1 loss is reliant on its role in promoting the repair of chromatin buried abasic sites. We show that ALC1 enhances the ability of the abasic site processing enzyme, Apurinic/Apyrimidinic endonuclease 1 (APE1) to cleave nucleosome-occluded abasic sites. However, unrepaired abasic sites in ALC1-deficient cells are readily accessed by APE1 at the nucleosome-free replication forks. APE1 cleavage leads to fork breakage and trapping of PARP1/2 upon PARPi treatment, resulting in hypersensitivity. Collectively, our studies reveal how cells overcome the chromatin barrier to repair abasic lesions and uncover cleavage of abasic sites as a mechanism to overcome limitations of PARPi.
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Affiliation(s)
- Natasha Ramakrishnan
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tyler M Weaver
- Department of Biochemistry and Molecular Biology, Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- University of Kansas Cancer Center, Kansas City, KS, 66160, USA
| | - Lindsey N Aubuchon
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Cancer Biology Graduate Program, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ayda Woldegerima
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Taylor Just
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Kevin Song
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Alessandro Vindigni
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Cancer Biology Graduate Program, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Bret D Freudenthal
- Department of Biochemistry and Molecular Biology, Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- University of Kansas Cancer Center, Kansas City, KS, 66160, USA
| | - Priyanka Verma
- Division of Oncology, Department of Medicine, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Cancer Biology Graduate Program, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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14
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Kostos L, Tran B, Azad AA. Combination of PARP Inhibitors and Androgen Receptor Pathway Inhibitors in Metastatic Castration-Resistant Prostate Cancer. Drugs 2024:10.1007/s40265-024-02071-y. [PMID: 39060912 DOI: 10.1007/s40265-024-02071-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2024] [Indexed: 07/28/2024]
Abstract
Despite recent advances in the treatment of metastatic prostate cancer, progression to a castration-resistant state remains inevitable for most and prognosis is limited. Genetic testing for homologous recombination repair pathway alterations is recommended for all patients with advanced prostate cancer given that a mutation is present in up to 25% of cases. Poly(ADP-ribose) polymerase (PARPis) are now approved for use in patients with metastatic castration-resistant prostate cancer who have progressed on an androgen receptor pathway inhibitor (ARPI) and harbour a germline or somatic homologous recombination repair mutation. Preclinical data support a synergistic effect with an ARPI and PARPi, and various ARPI-PARPi combinations have therefore been explored in phase III clinical trials. Despite heterogeneous findings, a clear hierarchy of benefit is evident, with patients harbouring a BRCA mutation deriving the greatest magnitude of benefit, followed by any homologous recombination repair mutation. The benefit in homologous recombination repair-proficient cohort is less clear, and questions remain about whether ARPI-PARPi combination therapy should be offered to patients without a homologous recombination repair mutation. With ARPIs now considered standard-of-care for metastatic hormone-sensitive prostate cancer, ARPI-PARPi combination therapy is currently being explored earlier in the treatment paradigm. The purpose of this review is to discuss the rationale behind ARPI-PARPi combination therapy, summarise the results of key clinical trials, and discuss clinical considerations and future perspectives.
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Affiliation(s)
- Louise Kostos
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, VIC, Australia
| | - Ben Tran
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, VIC, Australia
| | - Arun A Azad
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
- Sir Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, VIC, Australia.
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15
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Liu Z, Jiang H, Lee SY, Kong N, Chan YW. FANCM promotes PARP inhibitor resistance by minimizing ssDNA gap formation and counteracting resection inhibition. Cell Rep 2024; 43:114464. [PMID: 38985669 DOI: 10.1016/j.celrep.2024.114464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 05/22/2024] [Accepted: 06/24/2024] [Indexed: 07/12/2024] Open
Abstract
Poly(ADP-ribose) polymerase inhibitors (PARPis) exhibit remarkable anticancer activity in tumors with homologous recombination (HR) gene mutations. However, the role of other DNA repair proteins in PARPi-induced lethality remains elusive. Here, we reveal that FANCM promotes PARPi resistance independent of the core Fanconi anemia (FA) complex. FANCM-depleted cells retain HR proficiency, acting independently of BRCA1 in response to PARPis. FANCM depletion leads to increased DNA damage in the second S phase after PARPi exposure, driven by elevated single-strand DNA (ssDNA) gap formation behind replication forks in the first S phase. These gaps arise from both 53BP1- and primase and DNA directed polymerase (PRIMPOL)-dependent mechanisms. Notably, FANCM-depleted cells also exhibit reduced resection of collapsed forks, while 53BP1 deletion restores resection and mitigates PARPi sensitivity. Our results suggest that FANCM counteracts 53BP1 to repair PARPi-induced DNA damage. Furthermore, FANCM depletion leads to increased chromatin bridges and micronuclei formation after PARPi treatment, elucidating the mechanism underlying extensive cell death in FANCM-depleted cells.
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Affiliation(s)
- Zeyuan Liu
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Huadong Jiang
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Sze Yuen Lee
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Nannan Kong
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Ying Wai Chan
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.
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16
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Engbrecht M, Grundei D, Dilger AM, Wiedemann H, Aust AK, Baumgärtner S, Helfrich S, Kergl-Räpple F, Bürkle A, Mangerich A. Monitoring nucleolar-nucleoplasmic protein shuttling in living cells by high-content microscopy and automated image analysis. Nucleic Acids Res 2024:gkae598. [PMID: 39036969 DOI: 10.1093/nar/gkae598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 05/25/2024] [Accepted: 06/26/2024] [Indexed: 07/23/2024] Open
Abstract
The nucleolus has core functions in ribosome biosynthesis, but also acts as a regulatory hub in a plethora of non-canonical processes, including cellular stress. Upon DNA damage, several DNA repair factors shuttle between the nucleolus and the nucleoplasm. Yet, the molecular mechanisms underlying such spatio-temporal protein dynamics remain to be deciphered. Here, we present a novel imaging platform to investigate nucleolar-nucleoplasmic protein shuttling in living cells. For image acquisition, we used a commercially available automated fluorescence microscope and for image analysis, we developed a KNIME workflow with implementation of machine learning-based tools. We validated the method with different nucleolar proteins, i.e., PARP1, TARG1 and APE1, by monitoring their shuttling dynamics upon oxidative stress. As a paradigm, we analyzed PARP1 shuttling upon H2O2 treatment in combination with a range of pharmacological inhibitors in a novel reporter cell line. These experiments revealed that inhibition of SIRT7 results in a loss of nucleolar PARP1 localization. Finally, we unraveled specific differences in PARP1 shuttling dynamics after co-treatment with H2O2 and different clinical PARP inhibitors. Collectively, this work delineates a highly sensitive and versatile bioimaging platform to investigate swift nucleolar-nucleoplasmic protein shuttling in living cells, which can be employed for pharmacological screening and in-depth mechanistic analyses.
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Affiliation(s)
- Marina Engbrecht
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - David Grundei
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Asisa M Dilger
- Nutritional Toxicology, Institute of Nutritional Science, University of Potsdam, 14469 Potsdam, Germany
| | - Hannah Wiedemann
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Ann-Kristin Aust
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Sarah Baumgärtner
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | | | | | - Alexander Bürkle
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Aswin Mangerich
- Molecular Toxicology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
- Nutritional Toxicology, Institute of Nutritional Science, University of Potsdam, 14469 Potsdam, Germany
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17
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Böhi F, Hottiger MO. Expanding the Perspective on PARP1 and Its Inhibitors in Cancer Therapy: From DNA Damage Repair to Immunomodulation. Biomedicines 2024; 12:1617. [PMID: 39062190 PMCID: PMC11275100 DOI: 10.3390/biomedicines12071617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 07/11/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
The emergence of PARP inhibitors as a therapeutic strategy for tumors with high genomic instability, particularly those harboring BRCA mutations, has advanced cancer treatment. However, recent advances have illuminated a multifaceted role of PARP1 beyond its canonical function in DNA damage repair. This review explores the expanding roles of PARP1, highlighting its crucial interplay with the immune system during tumorigenesis. We discuss PARP1's immunomodulatory effects in macrophages and T cells, with a particular focus on cytokine expression. Understanding these immunomodulatory roles of PARP1 not only holds promise for enhancing the efficacy of PARP inhibitors in cancer therapy but also paves the way for novel treatment regimens targeting immune-mediated inflammatory diseases.
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Affiliation(s)
- Flurina Böhi
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
- Cancer Biology Ph.D. Program, Life Science Zurich Graduate School, University of Zurich, 8057 Zurich, Switzerland
| | - Michael O. Hottiger
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
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18
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Sellars E, Savguira M, Wu J, Cancelliere S, Jen M, Krishnan R, Hakem A, Barsyte-Lovejoy D, Hakem R, Narod SA, Kotsopoulos J, Salmena L. A high-throughput approach to identify BRCA1-downregulating compounds to enhance PARP inhibitor sensitivity. iScience 2024; 27:110180. [PMID: 38993666 PMCID: PMC11238136 DOI: 10.1016/j.isci.2024.110180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 04/29/2024] [Accepted: 06/01/2024] [Indexed: 07/13/2024] Open
Abstract
PARP inhibitors (PARPi) are efficacious in BRCA1-null tumors; however, their utility is limited in tumors with functional BRCA1. We hypothesized that pharmacologically reducing BRCA1 protein levels could enhance PARPi effectiveness in BRCA1 wild-type tumors. To identify BRCA1 downregulating agents, we generated reporter cell lines using CRISPR-mediated editing to tag endogenous BRCA1 protein with HiBiT. These reporter lines enable the sensitive measurement of BRCA1 protein levels by luminescence. Validated reporter cells were used in a pilot screen of epigenetic-modifying probes and a larger screen of more than 6,000 compounds. We identified 7 compounds that could downregulate BRCA1-HiBiT expression and synergize with olaparib. Three compounds, N-acetyl-N-acetoxy chlorobenzenesulfonamide (NANAC), A-443654, and CHIR-124, were validated to reduce BRCA1 protein levels and sensitize breast cancer cells to the toxic effects of olaparib. These results suggest that BRCA1-HiBiT reporter cells hold promise in developing agents to improve the clinical utility of PARPi.
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Affiliation(s)
- Erin Sellars
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, ON M5S 1B2, Canada
| | - Margarita Savguira
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Jie Wu
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Sabrina Cancelliere
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Mark Jen
- Lunenfeld-Tanenbaum Research Institute, Network Biology Collaborative Centre, High-Throughput Screening, Mt. Sinai Hospital, Sinai Health System, Toronto, ON M5G 1X5, Canada
| | - Rehna Krishnan
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Anne Hakem
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Dalia Barsyte-Lovejoy
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
- Structural Genomics Consortium, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Razqallah Hakem
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Steven A Narod
- Women's College Research Institute, Women's College Hospital, Toronto, ON M5S 1B2, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON M5T 3M7, Canada
| | - Joanne Kotsopoulos
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, ON M5S 1B2, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON M5T 3M7, Canada
| | - Leonardo Salmena
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, ON M5S 1B2, Canada
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19
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Gopal AA, Fernandez B, Delano J, Weissleder R, Dubach JM. PARP trapping is governed by the PARP inhibitor dissociation rate constant. Cell Chem Biol 2024; 31:1373-1382.e10. [PMID: 38262416 PMCID: PMC11259578 DOI: 10.1016/j.chembiol.2023.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 09/13/2023] [Accepted: 12/22/2023] [Indexed: 01/25/2024]
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPi) are a class of cancer drugs that enzymatically inhibit PARP activity at sites of DNA damage. Yet, PARPi function mainly by trapping PARP1 onto DNA with a wide range of potency among the clinically relevant inhibitors. How PARPi trap and why some are better trappers remain unknown. Here, we show trapping occurs primarily through a kinetic phenomenon at sites of DNA damage that correlates with PARPi koff. Our results suggest PARP trapping is not the physical stalling of PARP1 on DNA, rather the high probability of PARP re-binding damaged DNA in the absence of other DNA-binding protein recruitment. These results clarify how PARPi trap, shed new light on how PARPi function, and describe how PARPi properties correlate to trapping potency.
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Affiliation(s)
- Angelica A Gopal
- Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
| | - Bianca Fernandez
- Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
| | - Justin Delano
- Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - J Matthew Dubach
- Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114.
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20
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Li X, Zou L. BRCAness, DNA gaps, and gain and loss of PARP inhibitor-induced synthetic lethality. J Clin Invest 2024; 134:e181062. [PMID: 39007266 PMCID: PMC11245158 DOI: 10.1172/jci181062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024] Open
Abstract
Mutations in the tumor-suppressor genes BRCA1 and BRCA2 resulting in BRCA1/2 deficiency are frequently identified in breast, ovarian, prostate, pancreatic, and other cancers. Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPis) selectively kill BRCA1/2-deficient cancer cells by inducing synthetic lethality, providing an effective biomarker-guided strategy for targeted cancer therapy. However, a substantial fraction of cancer patients carrying BRCA1/2 mutations do not respond to PARPis, and most patients develop resistance to PARPis over time, highlighting a major obstacle to PARPi therapy in the clinic. Recent studies have revealed that changes of specific functional defects of BRCA1/2-deficient cells, particularly their defects in suppressing and protecting single-stranded DNA gaps, contribute to the gain or loss of PARPi-induced synthetic lethality. These findings not only shed light on the mechanism of action of PARPis, but also lead to revised models that explain how PARPis selectively kill BRCA-deficient cancer cells. Furthermore, new mechanistic principles of PARPi sensitivity and resistance have emerged from these studies, generating potentially useful guidelines for predicting the PARPi response and design therapies for overcoming PARPi resistance. In this Review, we will discuss these recent studies and put them in context with the classic views of PARPi-induced synthetic lethality, aiming to stimulate the development of new therapeutic strategies to overcome PARPi resistance and improve PARPi therapy.
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21
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Dibitetto D, Widmer CA, Rottenberg S. PARPi, BRCA, and gaps: controversies and future research. Trends Cancer 2024:S2405-8033(24)00134-1. [PMID: 39004561 DOI: 10.1016/j.trecan.2024.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/17/2024] [Accepted: 06/21/2024] [Indexed: 07/16/2024]
Abstract
In recent years, various poly(ADP-ribose) polymerase (PARP) inhibitors (PARPis) have been approved for the treatment of several cancers to target the vulnerability of homologous recombination (HR) deficiency (e.g., due to BRCA1/2 dysfunction). In this review we analyze the ongoing debates and recent breakthroughs in the use of PARPis for BRCA1/2-deficient cancers, juxtaposing the 'double-strand break (DSB)' and 'single-stranded DNA (ssDNA) gap' models of synthetic lethality induced by PARPis. We spotlight the complexity of this interaction, highlighting emerging research on the role of DNA polymerase theta (POLθ) and ssDNA gaps in shaping therapy responses. We scrutinize the clinical ramifications of these findings, especially concerning PARPi efficacy and resistance mechanisms, underscoring the heterogeneity of BRCA-mutated tumors and the urgent need for advanced research to bridge the gap between laboratory models and patient outcomes.
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Affiliation(s)
- Diego Dibitetto
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland; Bern Center for Precision Medicine and Cancer Therapy Research Cluster, Department for Biomedical Research, University of Bern, 3012 Bern, Switzerland; Molecular Oncology and DNA Damage Response Laboratory, Department of Experimental Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Mario Negri 2, 20156 Milan, Italy.
| | - Carmen A Widmer
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland; Bern Center for Precision Medicine and Cancer Therapy Research Cluster, Department for Biomedical Research, University of Bern, 3012 Bern, Switzerland
| | - Sven Rottenberg
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland; Bern Center for Precision Medicine and Cancer Therapy Research Cluster, Department for Biomedical Research, University of Bern, 3012 Bern, Switzerland; Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX Amsterdam, The Netherlands.
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22
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Mamar H, Fajka-Boja R, Mórocz M, Jurado E, Zentout S, Mihuţ A, Kopasz AG, Mérey M, Smith R, Sharma AB, Lakin N, Bowman A, Haracska L, Huet S, Timinszky G. The loss of DNA polymerase epsilon accessory subunits POLE3-POLE4 leads to BRCA1-independent PARP inhibitor sensitivity. Nucleic Acids Res 2024; 52:6994-7011. [PMID: 38828775 PMCID: PMC11229324 DOI: 10.1093/nar/gkae439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 05/02/2024] [Accepted: 05/09/2024] [Indexed: 06/05/2024] Open
Abstract
The clinical success of PARP1/2 inhibitors (PARPi) prompts the expansion of their applicability beyond homologous recombination deficiency. Here, we demonstrate that the loss of the accessory subunits of DNA polymerase epsilon, POLE3 and POLE4, sensitizes cells to PARPi. We show that the sensitivity of POLE4 knockouts is not due to compromised response to DNA damage or homologous recombination deficiency. Instead, POLE4 loss affects replication speed leading to the accumulation of single-stranded DNA gaps behind replication forks upon PARPi treatment, due to impaired post-replicative repair. POLE4 knockouts elicit elevated replication stress signaling involving ATR and DNA-PK. We find POLE4 to act parallel to BRCA1 in inducing sensitivity to PARPi and counteracts acquired resistance associated with restoration of homologous recombination. Altogether, our findings establish POLE4 as a promising target to improve PARPi driven therapies and hamper acquired PARPi resistance.
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Affiliation(s)
- Hasan Mamar
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Doctoral School of Biology, University of Szeged, 6720 Szeged, Hungary
| | - Roberta Fajka-Boja
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Department of Immunology, Albert Szent-Györgyi Medical School, Faculty of Science and Informatics, University of Szeged, 6720 Szeged, Hungary
| | - Mónika Mórocz
- HCEMM-BRC Mutagenesis and Carcinogenesis Research Group, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
| | - Eva Pinto Jurado
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Szeged, Hungary
- Univ Rennes, CNRS, IGDR (Institut de génétique et développement de Rennes) - UMR 6290, BIOSITUMS 3480 Rennes, France
| | - Siham Zentout
- Univ Rennes, CNRS, IGDR (Institut de génétique et développement de Rennes) - UMR 6290, BIOSITUMS 3480 Rennes, France
| | - Alexandra Mihuţ
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Szeged, Hungary
| | - Anna Georgina Kopasz
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Szeged, Hungary
| | - Mihály Mérey
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Szeged, Hungary
| | - Rebecca Smith
- Univ Rennes, CNRS, IGDR (Institut de génétique et développement de Rennes) - UMR 6290, BIOSITUMS 3480 Rennes, France
| | | | - Nicholas D Lakin
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, UK
| | - Andrew James Bowman
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick, UK
| | - Lajos Haracska
- HCEMM-BRC Mutagenesis and Carcinogenesis Research Group, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
| | - Sébastien Huet
- Univ Rennes, CNRS, IGDR (Institut de génétique et développement de Rennes) - UMR 6290, BIOSITUMS 3480 Rennes, France
| | - Gyula Timinszky
- Laboratory of DNA Damage and Nuclear Dynamics, Institute of Genetics, HUN-REN Biological Research Centre, 6276 Szeged, Hungary
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23
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Zhan Z, Zhang J, Liang H, Wang C, Hong L, Liu W. KAT6A Condensates Impair PARP1 Trapping of PARP Inhibitors in Ovarian Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2400140. [PMID: 38973255 DOI: 10.1002/advs.202400140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 05/04/2024] [Indexed: 07/09/2024]
Abstract
Most clinical PARP inhibitors (PARPis) trap PARP1 in a chromatin-bound state, leading to PARPi-mediated cytotoxicity. PARPi resistance impedes the treatment of ovarian cancer in clinical practice. However, the mechanism by which cancer cells overcome PARP1 trapping to develop PARPi resistance remains unclear. Here, it is shown that high levels of KAT6A promote PARPi resistance in ovarian cancer, regardless of its catalytic activity. Mechanistically, the liquid-liquid phase separation (LLPS) of KAT6A, facilitated by APEX1, inhibits the cytotoxic effects of PARP1 trapping during PARPi treatment. The stable KAT6A-PARP1-APEX1 complex reduces the amount of PARP1 trapped at the DNA break sites. In addition, inhibition of KAT6A LLPS, rather than its catalytic activity, impairs DNA damage repair and restores PARPi sensitivity in ovarian cancer both in vivo and in vitro. In conclusion, the findings demonstrate the role of KAT6A LLPS in fostering PARPi resistance and suggest that repressing KAT6A LLPS can be a potential therapeutic strategy for PARPi-resistant ovarian cancer.
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Affiliation(s)
- Zhiyan Zhan
- Department of Clinical Nutrition, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
- Clinical Research Center, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Jiarong Zhang
- Department of Obstetrics and Gynecology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Huisheng Liang
- Department of Gynecology, Zhongshan Hospital, Fudan University (Xiamen Branch), Xiamen, 361000, China
| | - Chong Wang
- Department of Obstetrics and Gynecology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, 85 Wujin Road, Shanghai, 200080, China
| | - Li Hong
- Department of Clinical Nutrition, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
- Clinical Research Center, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Wenxue Liu
- Department of Obstetrics and Gynecology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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24
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Li J, Xiong N, West KL, Leung M, Ching YP, Huang J, Yuan J, Yu CH, Leung J, Huen M. Nuclear F-actin assembly on damaged chromatin is regulated by DYRK1A and Spir1 phosphorylation. Nucleic Acids Res 2024:gkae574. [PMID: 38966995 DOI: 10.1093/nar/gkae574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 06/11/2024] [Accepted: 06/20/2024] [Indexed: 07/06/2024] Open
Abstract
Nuclear actin-based movements support DNA double-strand break (DSB) repair. However, molecular determinants that promote filamentous actin (F-actin) formation on the damaged chromatin remain undefined. Here we describe the DYRK1A kinase as a nuclear activity that promotes local F-actin assembly to support DSB mobility and repair, accomplished in part by its targeting of actin nucleator spire homolog 1 (Spir1). Indeed, perturbing DYRK1A-dependent phosphorylation of S482 mis-regulated Spir1 accumulation at damaged-modified chromatin, and led to compromised DSB-associated actin polymerization and attenuated DNA repair. Our findings uncover a role of the DYRK1A-Spir1 axis in nuclear actin dynamics during early DSB responses, and highlight the intricate details of nuclear cytoskeletal network in DSB repair and genome stability maintenance.
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Affiliation(s)
- Junshi Li
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
- State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, S.A.R
| | - Nan Xiong
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
- State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, S.A.R
| | - Kirk L West
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Manton Leung
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
| | - Yick Pang Ching
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
| | - Jun Huang
- The MOE Key Laboratory of Biosystems Homeostasis & Protection, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
- Cancer Center, Zhejiang University, Hangzhou 310058, China
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Jian Yuan
- Department of Biochemistry and Molecular Biology, Tongji University School of Medicine, Shanghai, China
| | - Cheng-Han Yu
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
| | - Justin Leung
- Department of Radiation Oncology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Michael Huen
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, S.A.R
- State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, S.A.R
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25
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Grothusen GP, Chang R, Cao Z, Zhou N, Mittal M, Datta A, Wulfridge P, Beer T, Wang B, Zheng N, Tang HY, Sarma K, Greenberg RA, Shi J, Busino L. DCAF15 control of cohesin dynamics sustains acute myeloid leukemia. Nat Commun 2024; 15:5604. [PMID: 38961054 PMCID: PMC11222469 DOI: 10.1038/s41467-024-49882-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 06/21/2024] [Indexed: 07/05/2024] Open
Abstract
The CRL4-DCAF15 E3 ubiquitin ligase complex is targeted by the aryl-sulfonamide molecular glues, leading to neo-substrate recruitment, ubiquitination, and proteasomal degradation. However, the physiological function of DCAF15 remains unknown. Using a domain-focused genetic screening approach, we reveal DCAF15 as an acute myeloid leukemia (AML)-biased dependency. Loss of DCAF15 results in suppression of AML through compromised replication fork integrity and consequent accumulation of DNA damage. Accordingly, DCAF15 loss sensitizes AML to replication stress-inducing therapeutics. Mechanistically, we discover that DCAF15 directly interacts with the SMC1A protein of the cohesin complex and destabilizes the cohesin regulatory factors PDS5A and CDCA5. Loss of PDS5A and CDCA5 removal precludes cohesin acetylation on chromatin, resulting in uncontrolled chromatin loop extrusion, defective DNA replication, and apoptosis. Collectively, our findings uncover an endogenous, cell autonomous function of DCAF15 in sustaining AML proliferation through post-translational control of cohesin dynamics.
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Affiliation(s)
- Grant P Grothusen
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Renxu Chang
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Zhendong Cao
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Nan Zhou
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Monika Mittal
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Arindam Datta
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Phillip Wulfridge
- Ellen and Ronald Caplan Cancer Center, The Wistar Institute, Philadelphia, PA, USA
| | - Thomas Beer
- Proteomics and Metabolomics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Baiyun Wang
- Howard Hughes Medical Institute, Department of Pharmacology, University of Washington, Seattle, WA, USA
| | - Ning Zheng
- Howard Hughes Medical Institute, Department of Pharmacology, University of Washington, Seattle, WA, USA
| | - Hsin-Yao Tang
- Proteomics and Metabolomics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Kavitha Sarma
- Ellen and Ronald Caplan Cancer Center, The Wistar Institute, Philadelphia, PA, USA
| | - Roger A Greenberg
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Junwei Shi
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Luca Busino
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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26
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Katsuda T, Nishio S, Tasaki S, Park J, Tasaki K, Tsuda N, Ushijima K. Olaparib maintenance therapy for platinum-sensitive relapsed ovarian cancer at a single institution: A retrospective study. J Obstet Gynaecol Res 2024; 50:1192-1200. [PMID: 38742699 DOI: 10.1111/jog.15965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/27/2024] [Indexed: 05/16/2024]
Abstract
AIM In this study, we aimed to investigate patient characteristics, efficacy, prognostic factors, and safety of olaparib maintenance therapy for platinum-sensitive recurrent ovarian cancer at our institution. METHODS Patients responding to platinum-based therapy and starting olaparib maintenance therapy for recurrent epithelial ovarian, fallopian tube, or peritoneal cancer at Kurume University Hospital between January 2018 and November 2021 were enrolled in the study. Their data were extracted retrospectively from medical records. RESULTS In all, 50 patients were included. The median (range) age of the patients, follow-up time, and duration of olaparib maintenance therapy were 62 (39-87) years, 21.6 (2.2-45.9) months, and 7.2 (2-45.9) months, respectively. Among the 29 patients tested for homologous recombination (HR) status, 22 (75.9%) were positive for HR deficiency (HRD), 12 (54.5%) of whom had BRCA-positive tumors. The median progression-free survival was 8.9 months (95% confidence interval: 6.2-12.6), and the median overall survival was 27.1 months (95% confidence interval: 22.5-40.3). Multivariate analysis of prognostic factors revealed that HRD was an independent prognostic factor for both progression-free survival and overall survival. The most common adverse event was nausea (any grade, n = 30, 60%), resulting in drug interruption (n = 23, 46%), dose reduction (n = 17, 34%), and discontinuation of treatment (n = 1, 2%). CONCLUSION Olaparib maintenance therapy for recurrent platinum-sensitive ovarian cancer at our institution was effective, with acceptable adverse events. HRD was the most significant prognostic factor for patients with recurrent platinum-sensitive ovarian cancer.
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Affiliation(s)
- Takahiro Katsuda
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Shin Nishio
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Shingo Tasaki
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Jongmyung Park
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Kazuto Tasaki
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Naotake Tsuda
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
| | - Kimio Ushijima
- Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
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27
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Noireterre A, Stutz F. Cdc48/p97 segregase: Spotlight on DNA-protein crosslinks. DNA Repair (Amst) 2024; 139:103691. [PMID: 38744091 DOI: 10.1016/j.dnarep.2024.103691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
The ATP-dependent molecular chaperone Cdc48 (in yeast) and its human counterpart p97 (also known as VCP), are essential for a variety of cellular processes, including the removal of DNA-protein crosslinks (DPCs) from the DNA. Growing evidence demonstrates in the last years that Cdc48/p97 is pivotal in targeting ubiquitinated and SUMOylated substrates on chromatin, thereby supporting the DNA damage response. Along with its cofactors, notably Ufd1-Npl4, Cdc48/p97 has emerged as a central player in the unfolding and processing of DPCs. This review introduces the detailed structure, mechanism and cellular functions of Cdc48/p97 with an emphasis on the current knowledge of DNA-protein crosslink repair pathways across several organisms. The review concludes by discussing the potential therapeutic relevance of targeting p97 in DPC repair.
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Affiliation(s)
- Audrey Noireterre
- Department of Molecular and Cellular Biology, University of Geneva, Geneva 4 1211, Switzerland
| | - Françoise Stutz
- Department of Molecular and Cellular Biology, University of Geneva, Geneva 4 1211, Switzerland.
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Wang T, Kyle AH, Baker JHE, Liu NA, Banáth JP, Teymori S, Minchinton AI. DNA-PK inhibitor AZD7648 is a more portent radiosensitizer than PARP inhibitor Olaparib in BRCA1/2 deficient tumors. DNA Repair (Amst) 2024; 139:103689. [PMID: 38749239 DOI: 10.1016/j.dnarep.2024.103689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/12/2024] [Accepted: 04/29/2024] [Indexed: 06/11/2024]
Abstract
The effectiveness of radiotherapy depends on the sensitivities of 'normal' and cancer cells to the administered radiation dose. Increasing the radiosensitivity of cancers by inhibiting DNA damage repair is a goal of much current research, however success depends on avoiding concomitant sensitization of normal tissues inevitably irradiated during therapy. In this study we investigated the mechanisms of radiosensitization for DNA-PK and PARP inhibitors by examining the impacts on proliferating vs quiescent cell populations. Experiments were performed in BRCA1/2null and wild-type parental cancer models in vitro and in vivo. Overall AZD7648 has greater radiosensitizing activity relative to Olaparib, with BRCA2-deficient models showing the greatest sensitivity. However, DNA-PK inhibitor AZD7648 also produced greater toxicity in all irradiated mice. While both DNA-PK and PARP inhibition sensitizes wild type tumor cells to radiation, in BRCA1/2 deficient cells PARP inhibition by Olaparib had limited radiosensitization capacity. Quiescent cells are more radioresistant than proliferating cells, and these were also effectively sensitized by AZD7648 while Olaparib was unable to increase radiation-induced cell kill, even in BRCA1/2null cells. These findings underscore the distinct mechanisms of radiosensitization for DNA-PK and PARP inhibitors. While DNA-PK inhibitors are able to target both proliferating and non-proliferating tumor cells for greater overall anti-cancer benefit, their application is limited by exacerbation of normal tissue toxicities. Conversely, PARP inhibitors exhibit selective activity for proliferating cells, providing a mechanism for targeting activity to cancers, but due to poor activity in non-proliferating cells they have an overall reduced impact on tumor growth control. This study highlights the importance of creating a therapeutic ratio with DNA damage repair inhibition radiation sensitizing strategies.
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Affiliation(s)
- Taixiang Wang
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Alastair H Kyle
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Jennifer H E Baker
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Nannan A Liu
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Judit P Banáth
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Sevin Teymori
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada
| | - Andrew I Minchinton
- BC Cancer Research Institute, Department of Integrative Oncology, 675W 10th Ave, Vancouver, BC V5Z 1L3, Canada.
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Patel V, Casimiro S, Abreu C, Barroso T, de Sousa RT, Torres S, Ribeiro LA, Nogueira-Costa G, Pais HL, Pinto C, Costa L, Costa L. DNA damage targeted therapy for advanced breast cancer. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2024; 5:678-698. [PMID: 38966174 PMCID: PMC11220312 DOI: 10.37349/etat.2024.00241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 01/04/2024] [Indexed: 07/06/2024] Open
Abstract
Breast cancer (BC) is the most prevalent malignancy affecting women worldwide, including Portugal. While the majority of BC cases are sporadic, hereditary forms account for 5-10% of cases. The most common inherited mutations associated with BC are germline mutations in the BReast CAncer (BRCA) 1/2 gene (gBRCA1/2). They are found in approximately 5-6% of BC patients and are inherited in an autosomal dominant manner, primarily affecting younger women. Pathogenic variants within BRCA1/2 genes elevate the risk of both breast and ovarian cancers and give rise to distinct clinical phenotypes. BRCA proteins play a key role in maintaining genome integrity by facilitating the repair of double-strand breaks through the homologous recombination (HR) pathway. Therefore, any mutation that impairs the function of BRCA proteins can result in the accumulation of DNA damage, genomic instability, and potentially contribute to cancer development and progression. Testing for gBRCA1/2 status is relevant for treatment planning, as it can provide insights into the likely response to therapy involving platinum-based chemotherapy and poly[adenosine diphosphate (ADP)-ribose] polymerase inhibitors (PARPi). The aim of this review was to investigate the impact of HR deficiency in BC, focusing on BRCA mutations and their impact on the modulation of responses to platinum and PARPi therapy, and to share the experience of Unidade Local de Saúde Santa Maria in the management of metastatic BC patients with DNA damage targeted therapy, including those with the Portuguese c.156_157insAlu BRCA2 founder mutation.
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Affiliation(s)
- Vanessa Patel
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Sandra Casimiro
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina de Lisboa, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Catarina Abreu
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Tiago Barroso
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | | | - Sofia Torres
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Leonor Abreu Ribeiro
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | | | - Helena Luna Pais
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Conceição Pinto
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Leila Costa
- Pharmacy Department, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
| | - Luís Costa
- Oncology Division, Unidade Local de Saúde Santa Maria, 1649-028 Lisboa, Portugal
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina de Lisboa, Universidade de Lisboa, 1649-028 Lisboa, Portugal
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30
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Peng X, Huang X, Zhang S, Zhang N, Huang S, Wang Y, Zhong Z, Zhu S, Gao H, Yu Z, Yan X, Tao Z, Dai Y, Zhang Z, Chen X, Wang F, Claret FX, Elkabets M, Ji N, Zhong Y, Kong D. Sequential Inhibition of PARP and BET as a Rational Therapeutic Strategy for Glioblastoma. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2307747. [PMID: 38896791 DOI: 10.1002/advs.202307747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 05/20/2024] [Indexed: 06/21/2024]
Abstract
PARP inhibitors (PARPi) hold substantial promise in treating glioblastoma (GBM). However, the adverse effects have restricted their broad application. Through unbiased transcriptomic and proteomic sequencing, it is discovered that the BET inhibitor (BETi) Birabresib profoundly alters the processes of DNA replication and cell cycle progression in GBM cells, beyond the previously reported impact of BET inhibition on homologous recombination repair. Through in vitro experiments using established GBM cell lines and patient-derived primary GBM cells, as well as in vivo orthotopic transplantation tumor experiments in zebrafish and nude mice, it is demonstrated that the concurrent administration of PARPi and BETi can synergistically inhibit GBM. Intriguingly, it is observed that DNA damage lingers after discontinuation of PARPi monotherapy, implying that sequential administration of PARPi followed by BETi can maintain antitumor efficacy while reducing toxicity. In GBM cells with elevated baseline replication stress, the sequential regimen exhibits comparable efficacy to concurrent treatment, protecting normal glial cells with lower baseline replication stress from DNA toxicity and subsequent death. This study provides compelling preclinical evidence supporting the development of innovative drug administration strategies focusing on PARPi for GBM therapy.
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Affiliation(s)
- Xin Peng
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
- Department of Systems Biology, the University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Xin Huang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Shaolu Zhang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100850, China
| | - Naixin Zhang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Shengfan Huang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Yingying Wang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Zhenxing Zhong
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Shan Zhu
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Haiwang Gao
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Zixiang Yu
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Xiaotong Yan
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Zhennan Tao
- Department of Neurosurgery, the Affiliated Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing, 210008, China
| | - Yuxiang Dai
- Department of Neurosurgery, the Affiliated Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing, 210008, China
| | - Zhe Zhang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
| | - Xi Chen
- Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin Eye Hospital, Tianjin, 300020, China
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Feng Wang
- Department of Genetics, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Francois X Claret
- Department of Systems Biology, the University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Moshe Elkabets
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Ning Ji
- National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China
| | - Yuxu Zhong
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100850, China
| | - Dexin Kong
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
- Key Laboratory of Immune Microenvironment and Diseases (Ministry of Education), International Joint Laboratory of Ocular Diseases (Ministry of Education), Tianjin Medical University, Tianjin, 300070, China
- Department of Pharmacy, Tianjin Medical University General Hospital, Tianjin, 300052, China
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31
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Sun L, Liu Y, Guo X, Cui T, Wu C, Tao J, Cheng C, Chu Q, Ji C, Li X, Guo H, Liang S, Zhou H, Zhou S, Ma K, Zhang N, Wang J, Liu Y, Liu L. Acetylation-dependent regulation of core spliceosome modulates hepatocellular carcinoma cassette exons and sensitivity to PARP inhibitors. Nat Commun 2024; 15:5209. [PMID: 38890388 PMCID: PMC11189467 DOI: 10.1038/s41467-024-49573-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 06/09/2024] [Indexed: 06/20/2024] Open
Abstract
Despite the importance of spliceosome core components in cellular processes, their roles in cancer development, including hepatocellular carcinoma (HCC), remain poorly understood. In this study, we uncover a critical role for SmD2, a core component of the spliceosome machinery, in modulating DNA damage in HCC through its impact on BRCA1/FANC cassette exons and expression. Our findings reveal that SmD2 depletion sensitizes HCC cells to PARP inhibitors, expanding the potential therapeutic targets. We also demonstrate that SmD2 acetylation by p300 leads to its degradation, while HDAC2-mediated deacetylation stabilizes SmD2. Importantly, we show that the combination of Romidepsin and Olaparib exhibits significant therapeutic potential in multiple HCC models, highlighting the promise of targeting SmD2 acetylation and HDAC2 inhibition alongside PARP inhibitors for HCC treatment.
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Affiliation(s)
- Linmao Sun
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China
| | - Yufeng Liu
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China
| | - Xinyu Guo
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Tianming Cui
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China
| | - Chenghui Wu
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Jie Tao
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Cheng Cheng
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Qi Chu
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Changyong Ji
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Xianying Li
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Hongrui Guo
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China
| | - Shuhang Liang
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China
| | - Huanran Zhou
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Department of Endocrinology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China
| | - Shuo Zhou
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Kun Ma
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China
| | - Ning Zhang
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China
| | - Jiabei Wang
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China.
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China.
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China.
| | - Yao Liu
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China.
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China.
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China.
| | - Lianxin Liu
- Department of Hepatobiliary Surgery, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China.
- Anhui Provincial Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, 230001, Anhui, China.
- Anhui Provincial Clinical Research Center for Hepatobiliary Diseases, Hefei, 230001, Anhui, China.
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Zentout S, Imburchia V, Chapuis C, Duma L, Schützenhofer K, Prokhorova E, Ahel I, Smith R, Huet S. Histone ADP-ribosylation promotes resistance to PARP inhibitors by facilitating PARP1 release from DNA lesions. Proc Natl Acad Sci U S A 2024; 121:e2322689121. [PMID: 38865276 PMCID: PMC11194589 DOI: 10.1073/pnas.2322689121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 05/07/2024] [Indexed: 06/14/2024] Open
Abstract
Poly(ADP-ribose) polymerase 1 (PARP1) has emerged as a central target for cancer therapies due to the ability of PARP inhibitors to specifically kill tumors deficient for DNA repair by homologous recombination. Upon DNA damage, PARP1 quickly binds to DNA breaks and triggers ADP-ribosylation signaling. ADP-ribosylation is important for the recruitment of various factors to sites of damage, as well as for the timely dissociation of PARP1 from DNA breaks. Indeed, PARP1 becomes trapped at DNA breaks in the presence of PARP inhibitors, a mechanism underlying the cytotoxitiy of these inhibitors. Therefore, any cellular process influencing trapping is thought to impact PARP inhibitor efficiency, potentially leading to acquired resistance in patients treated with these drugs. There are numerous ADP-ribosylation targets after DNA damage, including PARP1 itself as well as histones. While recent findings reported that the automodification of PARP1 promotes its release from the DNA lesions, the potential impact of other ADP-ribosylated proteins on this process remains unknown. Here, we demonstrate that histone ADP-ribosylation is also crucial for the timely dissipation of PARP1 from the lesions, thus contributing to cellular resistance to PARP inhibitors. Considering the crosstalk between ADP-ribosylation and other histone marks, our findings open interesting perspectives for the development of more efficient PARP inhibitor-driven cancer therapies.
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Affiliation(s)
- Siham Zentout
- University of Rennes, CNRS, Institut de génétique et développement de Rennes–UMR 6290, Biologie, Santé, Innovation Technologique (BIOSIT)–UMS3480, RennesF-35000, France
| | - Victor Imburchia
- University of Rennes, CNRS, Institut de génétique et développement de Rennes–UMR 6290, Biologie, Santé, Innovation Technologique (BIOSIT)–UMS3480, RennesF-35000, France
| | - Catherine Chapuis
- University of Rennes, CNRS, Institut de génétique et développement de Rennes–UMR 6290, Biologie, Santé, Innovation Technologique (BIOSIT)–UMS3480, RennesF-35000, France
| | - Lena Duma
- Sir William Dunn School of Pathology, University of Oxford, OxfordOX1 3RE, United Kingdom
| | - Kira Schützenhofer
- Sir William Dunn School of Pathology, University of Oxford, OxfordOX1 3RE, United Kingdom
| | - Evgeniia Prokhorova
- Sir William Dunn School of Pathology, University of Oxford, OxfordOX1 3RE, United Kingdom
| | - Ivan Ahel
- Sir William Dunn School of Pathology, University of Oxford, OxfordOX1 3RE, United Kingdom
| | - Rebecca Smith
- University of Rennes, CNRS, Institut de génétique et développement de Rennes–UMR 6290, Biologie, Santé, Innovation Technologique (BIOSIT)–UMS3480, RennesF-35000, France
- Sir William Dunn School of Pathology, University of Oxford, OxfordOX1 3RE, United Kingdom
| | - Sébastien Huet
- University of Rennes, CNRS, Institut de génétique et développement de Rennes–UMR 6290, Biologie, Santé, Innovation Technologique (BIOSIT)–UMS3480, RennesF-35000, France
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33
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Zhang Y, Li X, Liu F, Bai X, Liu X, Sun H, Gao C, Lin Y, Xing P, Zhu J, Liu R, Wang Z, Dai J, Shi D. Design of Selective PARP-1 Inhibitors and Antitumor Studies. J Med Chem 2024; 67:8877-8901. [PMID: 38776379 DOI: 10.1021/acs.jmedchem.3c02460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Designing selective PARP-1 inhibitors has become a new strategy for anticancer drug development. By sequence comparison of PARP-1 and PARP-2, we identified a possible selective site (S site) consisting of several different amino acid residues of α-5 helix and D-loop. Targeting this S site, 140 compounds were designed, synthesized, and characterized for their anticancer activities and mechanisms. Compound I16 showed the highest PARP-1 enzyme inhibitory activity (IC50 = 12.38 ± 1.33 nM) and optimal selectivity index over PARP-2 (SI = 155.74). Oral administration of I16 (25 mg/kg) showed high inhibition rates of Hela and SK-OV-3 tumor cell xenograft models, both of which were higher than those of the oral positive drug Olaparib (50 mg/kg). In addition, I16 has an excellent safety profile, without significant toxicity at high oral doses. These findings provide a novel design strategy and chemotype for the development of safe, efficient, and highly selective PARP-1 inhibitors.
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Affiliation(s)
- Yiting Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Xiangqian Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
- Laboratory of Marine Drugs and Biological Products, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Fang Liu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Xiaoyi Bai
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Xiaochun Liu
- Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
| | - Hao Sun
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Chenxia Gao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Yuxi Lin
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Pan Xing
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Jiqiang Zhu
- Shandong Linghai Biotechnology Co.Ltd., Jinan 250299, Shandong, P. R. China
| | - Ruihua Liu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Zemin Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Jiajia Dai
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China
| | - Dayong Shi
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
- Laboratory of Marine Drugs and Biological Products, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Shandong Linghai Biotechnology Co.Ltd., Jinan 250299, Shandong, P. R. China
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Fernandes I, Chehade R, MacKay H. PARP inhibitors in non-ovarian gynecologic cancers. Ther Adv Med Oncol 2024; 16:17588359241255174. [PMID: 38882441 PMCID: PMC11179472 DOI: 10.1177/17588359241255174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 04/25/2024] [Indexed: 06/18/2024] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPis) have transformed the treatment of ovarian cancer, particularly benefiting patients whose tumors harbor genomic events that result in impaired homologous recombination (HR) repair. The use of PARPi over recent years has expanded to include subpopulations of patients with breast, pancreatic, and prostate cancers. Their potential to benefit patients with non-ovarian gynecologic cancers is being recognized. This review examines the underlying biological rationale for exploring PARPi in non-ovarian gynecologic cancers. We consider the clinical data and place this in the context of the current treatment landscape. We review the development of PARPi strategies for treating patients with endometrial, cervical, uterine leiomyosarcoma, and vulvar cancers. Furthermore, we discuss future directions and the importance of understanding HR deficiency in the context of each cancer type.
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Affiliation(s)
| | - Rania Chehade
- Sunnybrook Odette Cancer Centre, Toronto, ON, Canada
| | - Helen MacKay
- Sunnybrook Odette Cancer Centre, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada
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Ndlovu H, Lawal IO, Mdanda S, Kgatle MM, Mokoala KMG, Al-Ibraheem A, Sathekge MM. [ 18F]F-Poly(ADP-Ribose) Polymerase Inhibitor Radiotracers for Imaging PARP Expression and Their Potential Clinical Applications in Oncology. J Clin Med 2024; 13:3426. [PMID: 38929955 PMCID: PMC11204862 DOI: 10.3390/jcm13123426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/30/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
Including poly(ADP-ribose) polymerase (PARP) inhibitors in managing patients with inoperable tumors has significantly improved outcomes. The PARP inhibitors hamper single-strand deoxyribonucleic acid (DNA) repair by trapping poly(ADP-ribose)polymerase (PARP) at sites of DNA damage, forming a non-functional "PARP enzyme-inhibitor complex" leading to cell cytotoxicity. The effect is more pronounced in the presence of PARP upregulation and homologous recombination (HR) deficiencies such as breast cancer-associated gene (BRCA1/2). Hence, identifying HR-deficiencies by genomic analysis-for instance, BRCA1/2 used in triple-negative breast cancer-should be a part of the selection process for PARP inhibitor therapy. Published data suggest BRCA1/2 germline mutations do not consistently predict favorable responses to PARP inhibitors, suggesting that other factors beyond tumor mutation status may be at play. A variety of factors, including tumor heterogeneity in PARP expression and intrinsic and/or acquired resistance to PARP inhibitors, may be contributing factors. This justifies the use of an additional tool for appropriate patient selection, which is noninvasive, and capable of assessing whole-body in vivo PARP expression and evaluating PARP inhibitor pharmacokinetics as complementary to the currently available BRCA1/2 analysis. In this review, we discuss [18F]Fluorine PARP inhibitor radiotracers and their potential in the imaging of PARP expression and PARP inhibitor pharmacokinetics. To provide context we also briefly discuss possible causes of PARP inhibitor resistance or ineffectiveness. The discussion focuses on TNBC, which is a tumor type where PARP inhibitors are used as part of the standard-of-care treatment strategy.
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Affiliation(s)
- Honest Ndlovu
- Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa; (H.N.); (S.M.); (M.M.K.); (K.M.G.M.)
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
| | - Ismaheel O. Lawal
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, GA 30322, USA
| | - Sipho Mdanda
- Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa; (H.N.); (S.M.); (M.M.K.); (K.M.G.M.)
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
| | - Mankgopo M. Kgatle
- Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa; (H.N.); (S.M.); (M.M.K.); (K.M.G.M.)
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
| | - Kgomotso M. G. Mokoala
- Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa; (H.N.); (S.M.); (M.M.K.); (K.M.G.M.)
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
| | - Akram Al-Ibraheem
- Department of Nuclear Medicine, King Hussein Cancer Center (KHCC), Al-Jubeiha P.O. Box 1269, Amman 11941, Jordan;
| | - Mike M. Sathekge
- Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa; (H.N.); (S.M.); (M.M.K.); (K.M.G.M.)
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa;
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Keggenhoff FL, Castven D, Becker D, Stojkovic S, Castven J, Zimpel C, Straub BK, Gerber T, Langer H, Hähnel P, Kindler T, Fahrer J, O'Rourke CJ, Ehmer U, Saborowski A, Ma L, Wang XW, Gaiser T, Matter MS, Sina C, Derer S, Lee JS, Roessler S, Kaina B, Andersen JB, Galle PR, Marquardt JU. PARP-1 selectively impairs KRAS-driven phenotypic and molecular features in intrahepatic cholangiocarcinoma. Gut 2024:gutjnl-2023-331237. [PMID: 38857989 DOI: 10.1136/gutjnl-2023-331237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 05/24/2024] [Indexed: 06/12/2024]
Abstract
OBJECTIVE Intrahepatic cholangiocarcinoma (iCCA) is the second most common primary liver cancer with limited therapeutic options. KRAS mutations are among the most abundant genetic alterations in iCCA associated with poor clinical outcome and treatment response. Recent findings indicate that Poly(ADP-ribose)polymerase1 (PARP-1) is implicated in KRAS-driven cancers, but its exact role in cholangiocarcinogenesis remains undefined. DESIGN PARP-1 inhibition was performed in patient-derived and established iCCA cells using RNAi, CRISPR/Cas9 and pharmacological inhibition in KRAS-mutant, non-mutant cells. In addition, Parp-1 knockout mice were combined with iCCA induction by hydrodynamic tail vein injection to evaluate an impact on phenotypic and molecular features of Kras-driven and Kras-wildtype iCCA. Clinical implications were confirmed in authentic human iCCA. RESULTS PARP-1 was significantly enhanced in KRAS-mutant human iCCA. PARP-1-based interventions preferentially impaired cell viability and tumourigenicity in human KRAS-mutant cell lines. Consistently, loss of Parp-1 provoked distinct phenotype in Kras/Tp53-induced versus Akt/Nicd-induced iCCA and abolished Kras-dependent cholangiocarcinogenesis. Transcriptome analyses confirmed preferential impairment of DNA damage response pathways and replicative stress response mediated by CHK1. Consistently, inhibition of CHK1 effectively reversed PARP-1 mediated effects. Finally, Parp-1 depletion induced molecular switch of KRAS-mutant iCCA recapitulating good prognostic human iCCA patients. CONCLUSION Our findings identify the novel prognostic and therapeutic role of PARP-1 in iCCA patients with activation of oncogenic KRAS signalling.
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Affiliation(s)
- Friederike L Keggenhoff
- First Department of Internal Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Darko Castven
- Department of Medicine I, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Diana Becker
- First Department of Internal Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Stojan Stojkovic
- Department of Medicine I, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Jovana Castven
- Department of Medicine I, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Carolin Zimpel
- Department of Medicine I, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Beate K Straub
- Institute of Pathology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Tissue Biobank of the University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Tiemo Gerber
- Institute of Pathology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Harald Langer
- Cardiology Angiology, University Medical Centre, Mannheim, Germany
| | - Patricia Hähnel
- Department of Hematology, Medical Oncology and Pneumology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Thomas Kindler
- Department of Hematology, Medical Oncology and Pneumology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Jörg Fahrer
- Department of Chemistry, RPTU Kaiserslautern-Landau, Kaiserslautern, Germany
| | - Colm J O'Rourke
- Department of Health and Medical Sciences, University of Copenhagen Biotech Research & Innovation Centre, Kobenhavn, Denmark
| | - Ursula Ehmer
- Department of Internal Medicine II, Klinikum rechts der Isar der Technischen Universitat, München, Germany
| | - Anna Saborowski
- Department of Gastroenterology, Hepatology, and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Lichun Ma
- Laboratory of Human Carcinogenesis, National Cancer Institute, Center for Cancer Research, Bethesda, Maryland, USA
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis, National Cancer Institute, Center for Cancer Research, Bethesda, Maryland, USA
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Timo Gaiser
- Institute of Pathology, University Medical Centre Mannheim, University of Heidelberg, Mannheim, Germany
| | - Matthias S Matter
- Institute of Pathology, University Hospital Basel, Basel, Switzerland
| | - Christian Sina
- Institute of Nutritional Medicine, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Stefanie Derer
- Institute of Nutritional Medicine, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
| | - Ju-Seog Lee
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Stephanie Roessler
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Bernd Kaina
- Department of Toxicology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Jesper B Andersen
- Department of Health and Medical Sciences, University of Copenhagen Biotech Research & Innovation Centre, Kobenhavn, Denmark
| | - Peter R Galle
- First Department of Internal Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Jens U Marquardt
- Department of Medicine I, University Medical Center Schleswig Holstein Campus Lübeck, Lübeck, Germany
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37
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McCarthy KA, Marcotte DJ, Parelkar S, McKinnon CL, Trammell LE, Stangeland EL, Jetson RR. Discovery of Potent Isoindolinone Inhibitors that Target an Active Conformation of PARP1 Using DNA-Encoded Libraries. ChemMedChem 2024; 19:e202400093. [PMID: 38482564 DOI: 10.1002/cmdc.202400093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Indexed: 04/11/2024]
Abstract
Inhibition of poly (ADP-ribose) polymerase-1 (PARP1), a DNA repair enzyme, has proven to be a successful strategy for the treatment of various cancers. With the appropriate selection conditions and protein design, DNA-encoded library (DEL) technology provides a powerful avenue to identify small molecules with the desired mechanism of action towards a target of interest. However, DNA-binding proteins, such as PARP1, can be challenging targets for DEL screening due to non-specific protein-DNA interactions. To overcome this, we designed and screened a PARP1 catalytic domain construct without the autoinhibitory helical domain. This allowed us to interrogate an active, functionally-relevant form of the protein resulting in the discovery of novel isoindolinone PARP1 inhibitors with single-digit nanomolar potency. These inhibitors also demonstrated little to no PARP1-DNA trapping, a property that could be advantageous in the clinic.
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Affiliation(s)
- Kelly A McCarthy
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Douglas J Marcotte
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Sangram Parelkar
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Crystal L McKinnon
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Lindsay E Trammell
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Eric L Stangeland
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
| | - Rachael R Jetson
- Discovery Sciences, Valo Health, 75 Hayden Avenue, Lexington, MA, 02421, United States
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38
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Amor-Guéret M. Loss of cytidine deaminase expression as a potential attempt to counteract the process of carcinogenesis by reducing basal PARP-1 activity and increasing tau levels. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167213. [PMID: 38714266 DOI: 10.1016/j.bbadis.2024.167213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 04/01/2024] [Accepted: 05/01/2024] [Indexed: 05/09/2024]
Abstract
Cytidine deaminase (CDA) is a pyrimidine salvage pathway enzyme that catalyzes the hydrolytic deamination of free cytidine and deoxycytidine to uridine and deoxyuridine, respectively. Our team discovered that CDA deficiency is associated with several aspects of genetic instability, such as increased sister chromatid exchange and ultrafine anaphase bridge frequencies. Based on these results, we sought (1) to determine how CDA deficiency contributes to genetic instability, (2) to explore the possible relationships between CDA deficiency and carcinogenesis, and (3) to develop a new anticancer treatment targeting CDA-deficient tumors. This review summarizes our major findings indicating that CDA deficiency is associated with a genetic instability that does not confer an increased cancer risk. In light of our results and published data, I propose a novel hypothesis that loss of CDA, by reducing basal PARP-1 activity and increasing Tau levels, may reflect an attempt to prevent, slow or reverse the process of carcinogenesis.
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Affiliation(s)
- Mounira Amor-Guéret
- Institut Curie, PSL Research University, UMR 3348, 91405 Orsay, France; CNRS UMR 3348, Centre Universitaire, 91405 Orsay, France; Université Paris-Saclay, Centre Universitaire, UMR 3348, 91405 Orsay, France.
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39
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Safdar R, Mishra A, Shah GM, Ashraf MZ. Poly (ADP-ribose) Polymerase-1 modulations in the genesis of thrombosis. J Thromb Thrombolysis 2024; 57:743-753. [PMID: 38787496 DOI: 10.1007/s11239-024-02974-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/28/2024] [Indexed: 05/25/2024]
Abstract
Thrombosis, a coagulation disorder, occurs due to altered levels of coagulation, fibrinolytic and immune factors, which are otherwise known to maintain hemostasis in normal physiological conditions. Here, we review the direct and indirect participation of a multifunctional nuclear enzyme poly (ADP-ribose) polymerase-1 (PARP1) in the expression of key genes and cellular processes involved in thrombotic pathogenesis. PARP1 biological activities range from maintenance of genomic integrity, chromatin remodeling, base excision DNA repair, stress responses to cell death, angiogenesis and cell cycle pathways. However, under homeostatic imbalances, PARP1 activities are linked with the pathogenesis of diseases, including cancer, aging, neurological disorders, and cardiovascular diseases. Disease-associated distressed cells employ a variety of PARP-1 functions such as oxidative damage exacerbations, cellular energetics and apoptosis pathways, regulation of inflammatory mediators, promotion of endothelial dysfunction, and ERK-mediated signaling in pathogenesis. Thrombosis is one such pathogenesis that comprises exacerbation of coagulation cascade due to biochemical alterations in endothelial cells, platelet activation, overexpression of adhesion molecules, cytokines release, and leukocyte adherence. Thus, the activation of endothelial and inflammatory cells in thrombosis implicates a potential role of PARP1 activation in thrombogenesis. This review article explores the direct impact of PARP1 activation in the etiology of thrombosis and discusses PARP1-mediated endothelial dysfunction, inflammation, and epigenetic regulations in the disease manifestation. Understanding PARP1 functions associated with thrombosis may elucidate novel pathogenetic mechanisms and help in better disease management through newer therapeutic interventions targeting PARP1 activity.
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Affiliation(s)
- Raishal Safdar
- Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
| | - Aastha Mishra
- CSIR-Institute of Genomics & Integrative Biology, Delhi, India
| | - Girish M Shah
- Neuroscience Division, CHU de Québec Université Laval Research Center, Québec City, QC, G1V 4G2, Canada
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40
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Lee AV, Nestler KA, Chiappinelli KB. Therapeutic targeting of DNA methylation alterations in cancer. Pharmacol Ther 2024; 258:108640. [PMID: 38570075 DOI: 10.1016/j.pharmthera.2024.108640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/13/2024] [Accepted: 03/22/2024] [Indexed: 04/05/2024]
Abstract
DNA methylation is a critical component of gene regulation and plays an important role in the development of cancer. Hypermethylation of tumor suppressor genes and silencing of DNA repair pathways facilitate uncontrolled cell growth and synergize with oncogenic mutations to perpetuate cancer phenotypes. Additionally, aberrant DNA methylation hinders immune responses crucial for antitumor immunity. Thus, inhibiting dysregulated DNA methylation is a promising cancer therapy. Pharmacologic inhibition of DNA methylation reactivates silenced tumor suppressors and bolster immune responses through induction of viral mimicry. Now, with the advent of immunotherapies and discovery of the immune-modulatory effects of DNA methylation inhibitors, there is great interest in understanding how targeting DNA methylation in combination with other therapies can enhance antitumor immunity. Here, we describe the role of aberrant DNA methylation in cancer and mechanisms by which it promotes tumorigenesis and modulates immune responses. Finally, we review the initial discoveries and ongoing efforts to target DNA methylation as a cancer therapeutic.
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Affiliation(s)
- Abigail V Lee
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
| | - Kevin A Nestler
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
| | - Katherine B Chiappinelli
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA.
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41
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Hill BR, Ozgencil M, Buckley-Benbow L, Skingsley SLP, Tomlinson D, Eizmendi CO, Agnarelli A, Bellelli R. Loss of POLE3-POLE4 unleashes replicative gap accumulation upon treatment with PARP inhibitors. Cell Rep 2024; 43:114205. [PMID: 38753485 DOI: 10.1016/j.celrep.2024.114205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 04/06/2024] [Accepted: 04/23/2024] [Indexed: 05/18/2024] Open
Abstract
The advent of PARP inhibitors (PARPis) has profoundly changed the treatment landscape of BRCA1/BRCA2-mutated cancers. Despite this, the development of resistance to these compounds has become a major challenge. Hence, a detailed understanding of the mechanisms underlying PARPi sensitivity is crucially needed. Here, we show that loss of the POLE3-POLE4 subunits of DNA polymerase epsilon (Polε) strongly sensitizes cancer cells to PARPis in a Polε level-independent manner. Loss of POLE3-POLE4 is not associated with defective RAD51 foci formation, excluding a major defect in homologous recombination. On the contrary, treatment with PARPis triggers replicative gap accumulation in POLE3-POLE4 knockout (KO) cells in a PRIMPOL-dependent manner. In addition to this, the loss of POLE3-POLE4 further sensitizes BRCA1-silenced cells to PARPis. Importantly, the knockdown of 53BP1 does not rescue PARPi sensitivity in POLE3-POLE4 KO cells, bypassing a common PARPi resistance mechanism and outlining a potential strategy to sensitize cancer cells to PARPis.
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Affiliation(s)
- Bethany Rebekah Hill
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Meryem Ozgencil
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Lauryn Buckley-Benbow
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Sophie Louise Pamela Skingsley
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Danielle Tomlinson
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Carmen Ortueta Eizmendi
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Alessandro Agnarelli
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK
| | - Roberto Bellelli
- Centre for Cancer Cell & Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, EC1M 6BQ London, UK.
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42
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Kanev PB, Varhoshkova S, Georgieva I, Lukarska M, Kirova D, Danovski G, Stoynov S, Aleksandrov R. A unified mechanism for PARP inhibitor-induced PARP1 chromatin retention at DNA damage sites in living cells. Cell Rep 2024; 43:114234. [PMID: 38758646 DOI: 10.1016/j.celrep.2024.114234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 03/20/2024] [Accepted: 04/26/2024] [Indexed: 05/19/2024] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPis) not only suppress PARP1 catalytic activity but also prolong its association to damaged chromatin. Here, through live-cell imaging, we quantify the alterations in PARP1 dynamics and activity elicited by seven PARPis over a wide range of concentrations to deliver a unified mechanism of PARPi-induced PARP1 chromatin retention. We find that gross PARP1 retention at DNA damage sites is jointly governed by catalytic inhibition and allosteric trapping, albeit in a strictly independent manner-catalytic inhibition causes multiple unproductive binding-dissociation cycles of PARP1, while allosteric trapping prolongs the lesion-bound state of PARP1 to greatly increase overall retention. Importantly, stronger PARP1 retention produces greater temporal shifts in downstream DNA repair events and superior cytotoxicity, highlighting PARP1 retention, a complex but precisely quantifiable characteristic of PARPis, as a valuable biomarker for PARPi efficacy. Our approach can be promptly repurposed for interrogating the properties of DNA-repair-targeting compounds beyond PARPis.
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Affiliation(s)
- Petar-Bogomil Kanev
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria
| | - Sylvia Varhoshkova
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria
| | - Irina Georgieva
- Transmembrane Signaling Laboratory, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria
| | - Maria Lukarska
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Dilyana Kirova
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria
| | - Georgi Danovski
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria
| | - Stoyno Stoynov
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria.
| | - Radoslav Aleksandrov
- Laboratory of Genomic Stability, Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.21, 1113 Sofia, Bulgaria.
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43
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Bulanova D, Akimov Y, Senkowski W, Oikkonen J, Gall-Mas L, Timonen S, Elmadani M, Hynninen J, Hautaniemi S, Aittokallio T, Wennerberg K. A synthetic lethal dependency on casein kinase 2 in response to replication-perturbing therapeutics in RB1-deficient cancer cells. SCIENCE ADVANCES 2024; 10:eadj1564. [PMID: 38781347 PMCID: PMC11114247 DOI: 10.1126/sciadv.adj1564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 04/16/2024] [Indexed: 05/25/2024]
Abstract
Resistance to therapy commonly develops in patients with high-grade serous ovarian carcinoma (HGSC) and triple-negative breast cancer (TNBC), urging the search for improved therapeutic combinations and their predictive biomarkers. Starting from a CRISPR knockout screen, we identified that loss of RB1 in TNBC or HGSC cells generates a synthetic lethal dependency on casein kinase 2 (CK2) for surviving the treatment with replication-perturbing therapeutics such as carboplatin, gemcitabine, or PARP inhibitors. CK2 inhibition in RB1-deficient cells resulted in the degradation of another RB family cell cycle regulator, p130, which led to S phase accumulation, micronuclei formation, and accelerated PARP inhibition-induced aneuploidy and mitotic cell death. CK2 inhibition was also effective in primary patient-derived cells. It selectively prevented the regrowth of RB1-deficient patient HGSC organoids after treatment with carboplatin or niraparib. As about 25% of HGSCs and 40% of TNBCs have lost RB1 expression, CK2 inhibition is a promising approach to overcome resistance to standard therapeutics in large strata of patients.
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Affiliation(s)
- Daria Bulanova
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Institute for Molecular Medicine Finland, Helsinki Institute for Life Sciences, University of Helsinki, Helsinki, Finland
| | - Yevhen Akimov
- Institute for Molecular Medicine Finland, Helsinki Institute for Life Sciences, University of Helsinki, Helsinki, Finland
| | - Wojciech Senkowski
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Jaana Oikkonen
- Research Program in Systems Oncology (ONCOSYS), University of Helsinki, Helsinki, Finland
| | - Laura Gall-Mas
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Sanna Timonen
- Institute for Molecular Medicine Finland, Helsinki Institute for Life Sciences, University of Helsinki, Helsinki, Finland
| | | | - Johanna Hynninen
- Department of Obstetrics and Gynecology, Turku University Hospital and University of Turku, Turku, Finland
| | - Sampsa Hautaniemi
- Research Program in Systems Oncology (ONCOSYS), University of Helsinki, Helsinki, Finland
| | - Tero Aittokallio
- Institute for Molecular Medicine Finland, Helsinki Institute for Life Sciences, University of Helsinki, Helsinki, Finland
- Institute for Cancer Research, Department of Cancer Genetics, Oslo University Hospital, Oslo, Norway
- Oslo Centre for Biostatistics and Epidemiology (OCBE), University of Oslo, Oslo, Norway
| | - Krister Wennerberg
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
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Wu N, Zhang X, Fang C, Zhu M, Wang Z, Jian L, Tan W, Wang Y, Li H, Xu X, Zhou Y, Chu TY, Wang J, Liao Q. Progesterone Enhances Niraparib Efficacy in Ovarian Cancer by Promoting Palmitoleic-Acid-Mediated Ferroptosis. RESEARCH (WASHINGTON, D.C.) 2024; 7:0371. [PMID: 38798714 PMCID: PMC11116976 DOI: 10.34133/research.0371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 04/10/2024] [Indexed: 05/29/2024]
Abstract
Poly (adenosine 5'-diphosphate-ribose) polymerase inhibitors (PARPi) are increasingly important in the treatment of ovarian cancer. However, more than 40% of BRCA1/2-deficient patients do not respond to PARPi, and BRCA wild-type cases do not show obvious benefit. In this study, we demonstrated that progesterone acted synergistically with niraparib in ovarian cancer cells by enhancing niraparib-mediated DNA damage and death regardless of BRCA status. This synergy was validated in an ovarian cancer organoid model and in vivo experiments. Furthermore, we found that progesterone enhances the activity of niraparib in ovarian cancer through inducing ferroptosis by up-regulating palmitoleic acid and causing mitochondrial damage. In clinical cohort, it was observed that progesterone prolonged the survival of patients with ovarian cancer receiving PARPi as second-line maintenance therapy, and high progesterone receptor expression combined with low glutathione peroxidase 4 (GPX4) expression predicted better efficacy of PARPi in patients with ovarian cancer. These findings not only offer new therapeutic strategies for PARPi poor response ovarian cancer but also provide potential molecular markers for predicting the PARPi efficacy.
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Affiliation(s)
- Nayiyuan Wu
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Xiu Zhang
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Chao Fang
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations,
Changsha Medical University, Changsha 410219, Hunan, China
| | - Miaochen Zhu
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Zhibin Wang
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Lian Jian
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
| | - Weili Tan
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
| | - Ying Wang
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - He Li
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
| | - Xuemeng Xu
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Yujuan Zhou
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Tang-Yuan Chu
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Department of Obstetrics & Gynecology,
Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan, China
| | - Jing Wang
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
| | - Qianjin Liao
- The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital, Changsha 410078, Hunan, China
- Public Service Platform of Tumor Organoids Technology,
Hunan Gynecological Tumor Clinical Research Center, Changsha 410013, Hunan, China
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45
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Dibitetto D, Liptay M, Vivalda F, Dogan H, Gogola E, González Fernández M, Duarte A, Schmid JA, Decollogny M, Francica P, Przetocka S, Durant ST, Forment JV, Klebic I, Siffert M, de Bruijn R, Kousholt AN, Marti NA, Dettwiler M, Sørensen CS, Tille JC, Undurraga M, Labidi-Galy I, Lopes M, Sartori AA, Jonkers J, Rottenberg S. H2AX promotes replication fork degradation and chemosensitivity in BRCA-deficient tumours. Nat Commun 2024; 15:4430. [PMID: 38789420 PMCID: PMC11126719 DOI: 10.1038/s41467-024-48715-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Histone H2AX plays a key role in DNA damage signalling in the surrounding regions of DNA double-strand breaks (DSBs). In response to DNA damage, H2AX becomes phosphorylated on serine residue 139 (known as γH2AX), resulting in the recruitment of the DNA repair effectors 53BP1 and BRCA1. Here, by studying resistance to poly(ADP-ribose) polymerase (PARP) inhibitors in BRCA1/2-deficient mammary tumours, we identify a function for γH2AX in orchestrating drug-induced replication fork degradation. Mechanistically, γH2AX-driven replication fork degradation is elicited by suppressing CtIP-mediated fork protection. As a result, H2AX loss restores replication fork stability and increases chemoresistance in BRCA1/2-deficient tumour cells without restoring homology-directed DNA repair, as highlighted by the lack of DNA damage-induced RAD51 foci. Furthermore, in the attempt to discover acquired genetic vulnerabilities, we find that ATM but not ATR inhibition overcomes PARP inhibitor (PARPi) resistance in H2AX-deficient tumours by interfering with CtIP-mediated fork protection. In summary, our results demonstrate a role for H2AX in replication fork biology in BRCA-deficient tumours and establish a function of H2AX separable from its classical role in DNA damage signalling and DSB repair.
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Affiliation(s)
- Diego Dibitetto
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland.
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland.
- Department of Experimental Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, via Mario Negri 2, 20156, Milan, Italy.
| | - Martin Liptay
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Francesca Vivalda
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Hülya Dogan
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Ewa Gogola
- Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX, Amsterdam, The Netherlands
- Oncode Institute, Amsterdam, The Netherlands
| | - Martín González Fernández
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Alexandra Duarte
- Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX, Amsterdam, The Netherlands
- Oncode Institute, Amsterdam, The Netherlands
| | - Jonas A Schmid
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Morgane Decollogny
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Paola Francica
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Sara Przetocka
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Stephen T Durant
- DDR Biology, Bioscience, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, UK
| | - Josep V Forment
- DDR Biology, Bioscience, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, UK
| | - Ismar Klebic
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
| | - Myriam Siffert
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
| | - Roebi de Bruijn
- Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX, Amsterdam, The Netherlands
- Oncode Institute, Amsterdam, The Netherlands
| | - Arne N Kousholt
- Oncode Institute, Amsterdam, The Netherlands
- Biotech Research and Innovation Centre, University of Copenhagen, 2200 N, Copenhagen, Denmark
| | - Nicole A Marti
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland
| | - Martina Dettwiler
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland
| | - Claus S Sørensen
- Biotech Research and Innovation Centre, University of Copenhagen, 2200 N, Copenhagen, Denmark
| | - Jean-Christophe Tille
- Division of Clinical Pathology, Department of Diagnostics, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Manuela Undurraga
- Division of Gynecology, Department of Pediatrics and Gynecology, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Intidhar Labidi-Galy
- Faculty of Medicine, Department of Medicine and Center of Translational Research in Onco-Hematology, University of Geneva, Swiss Cancer Center Leman, Geneva, Switzerland
- Department of Oncology, Hôpitaux Universitaires de Genève, 4, Rue Gabrielle Perret-Gentil, Geneva, 1205, Switzerland
| | - Massimo Lopes
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Alessandro A Sartori
- Institute of Molecular Cancer Research, University of Zürich, Zürich, Switzerland
| | - Jos Jonkers
- Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX, Amsterdam, The Netherlands.
- Oncode Institute, Amsterdam, The Netherlands.
| | - Sven Rottenberg
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012, Bern, Switzerland.
- Cancer Therapy Resistance Cluster and Bern Center for Precision Medicine, Department for Biomedical Research, University of Bern, 3012, Bern, Switzerland.
- Division of Molecular Pathology, The Netherlands Cancer Institute, 1066CX, Amsterdam, The Netherlands.
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46
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Schreuder A, Wendel TJ, Dorresteijn CGV, Noordermeer SM. (Single-stranded DNA) gaps in understanding BRCAness. Trends Genet 2024:S0168-9525(24)00100-8. [PMID: 38789375 DOI: 10.1016/j.tig.2024.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/26/2024]
Abstract
The tumour-suppressive roles of BRCA1 and 2 have been attributed to three seemingly distinct functions - homologous recombination, replication fork protection, and single-stranded (ss)DNA gap suppression - and their relative importance is under debate. In this review, we examine the origin and resolution of ssDNA gaps and discuss the recent advances in understanding the role of BRCA1/2 in gap suppression. There are ample data showing that gap accumulation in BRCA1/2-deficient cells is linked to genomic instability and chemosensitivity. However, it remains unclear whether there is a causative role and the function of BRCA1/2 in gap suppression cannot unambiguously be dissected from their other functions. We therefore conclude that the three functions of BRCA1 and 2 are closely intertwined and not mutually exclusive.
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Affiliation(s)
- Anne Schreuder
- Leiden University Medical Center, Department of Human Genetics, Leiden, The Netherlands; Oncode Institute, Utrecht, The Netherlands
| | - Tiemen J Wendel
- Leiden University Medical Center, Department of Human Genetics, Leiden, The Netherlands; Oncode Institute, Utrecht, The Netherlands
| | - Carlo G V Dorresteijn
- Leiden University Medical Center, Department of Human Genetics, Leiden, The Netherlands
| | - Sylvie M Noordermeer
- Leiden University Medical Center, Department of Human Genetics, Leiden, The Netherlands; Oncode Institute, Utrecht, The Netherlands.
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47
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Mentzel J, Hildebrand LS, Kuhlmann L, Fietkau R, Distel LV. Effective Radiosensitization of HNSCC Cell Lines by DNA-PKcs Inhibitor AZD7648 and PARP Inhibitors Talazoparib and Niraparib. Int J Mol Sci 2024; 25:5629. [PMID: 38891817 PMCID: PMC11172136 DOI: 10.3390/ijms25115629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/16/2024] [Accepted: 05/19/2024] [Indexed: 06/21/2024] Open
Abstract
(1) Head and neck squamous cell carcinoma (HNSCC) is common, while treatment is difficult, and mortality is high. Kinase inhibitors are promising to enhance the effects of radiotherapy. We compared the effects of the PARP inhibitors talazoparib and niraparib and that of the DNA-PKcs inhibitor AZD7648, combined with ionizing radiation. (2) Seven HNSCC cell lines, including Cal33, CLS-354, Detroit 562, HSC4, RPMI2650 (HPV-negative), UD-SCC-2 and UM-SCC-47 (HPV-positive), and two healthy fibroblast cell lines, SBLF8 and SBLF9, were studied. Flow cytometry was used to analyze apoptosis and necrosis induction (AnnexinV/7AAD) and cell cycle distribution (Hoechst). Cell inactivation was studied by the colony-forming assay. (3) AZD7648 had the strongest effects, radiosensitizing all HNSCC cell lines, almost always in a supra-additive manner. Talazoparib and niraparib were effective in both HPV-positive cell lines but only consistently in one and two HPV-negative cell lines, respectively. Healthy fibroblasts were not affected by any combined treatment in apoptosis and necrosis induction or G2/M-phase arrest. AZD7648 alone was not toxic to healthy fibroblasts, while the combination with ionizing radiation reduced clonogenicity. (4) In conclusion, talazoparib, niraparib and, most potently, AZD7648 could improve radiation therapy in HNSCC. Healthy fibroblasts tolerated AZD7648 alone extremely well, but irradiation-induced effects might occur. Our results justify in vivo studies.
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Affiliation(s)
- Jacob Mentzel
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany; (J.M.); (L.S.H.); (L.K.); (R.F.)
- Comprehensive Cancer Center Erlangen-Europäische Metropolregion Nürnberg (CCC ER-EMN), 91054 Erlangen, Germany
| | - Laura S. Hildebrand
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany; (J.M.); (L.S.H.); (L.K.); (R.F.)
- Comprehensive Cancer Center Erlangen-Europäische Metropolregion Nürnberg (CCC ER-EMN), 91054 Erlangen, Germany
| | - Lukas Kuhlmann
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany; (J.M.); (L.S.H.); (L.K.); (R.F.)
- Comprehensive Cancer Center Erlangen-Europäische Metropolregion Nürnberg (CCC ER-EMN), 91054 Erlangen, Germany
| | - Rainer Fietkau
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany; (J.M.); (L.S.H.); (L.K.); (R.F.)
- Comprehensive Cancer Center Erlangen-Europäische Metropolregion Nürnberg (CCC ER-EMN), 91054 Erlangen, Germany
| | - Luitpold V. Distel
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany; (J.M.); (L.S.H.); (L.K.); (R.F.)
- Comprehensive Cancer Center Erlangen-Europäische Metropolregion Nürnberg (CCC ER-EMN), 91054 Erlangen, Germany
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48
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Smith-Pillet ES, Billur R, Langelier MF, Talele TT, Pascal JM, Black BE. A PARP2-specific active site α-helix melts to permit DNA damage-induced enzymatic activation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.20.594972. [PMID: 38826291 PMCID: PMC11142140 DOI: 10.1101/2024.05.20.594972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
PARP1 and PARP2 recognize DNA breaks immediately upon their formation, generate a burst of local PARylation to signal their location, and are co-targeted by all current FDA-approved forms of PARP inhibitors (PARPi) used in the cancer clinic. Recent evidence indicates that the same PARPi molecules impact PARP2 differently from PARP1, raising the possibility that allosteric activation may also differ. We find that unlike for PARP1, destabilization of the autoinhibitory domain of PARP2 is insufficient for DNA damage-induced catalytic activation. Rather, PARP2 activation requires further unfolding of an active site α-helix absent in PARP1. Only one clinical PARPi, Olaparib, stabilizes the PARP2 active site α-helix, representing a structural feature with the potential to discriminate small molecule inhibitors. Collectively, our findings reveal unanticipated differences in local structure and changes in activation-coupled backbone dynamics between PARP1 and PARP2.
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Affiliation(s)
- Emily S. Smith-Pillet
- Department of Biochemistry and Biophysics, Penn Center for Genome Integrity, Epigenetics Institute
- Graduate Program in Biochemistry, Biophysics, Chemical Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19140-6059 USA
| | - Ramya Billur
- Department of Biochemistry and Biophysics, Penn Center for Genome Integrity, Epigenetics Institute
| | - Marie-France Langelier
- Département de Biochimie et Médecine Moléculaire, Université de Montréal Montréal, (Québec), H3C 3J7 Canada
| | - Tanaji T. Talele
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439 USA
| | - John M. Pascal
- Département de Biochimie et Médecine Moléculaire, Université de Montréal Montréal, (Québec), H3C 3J7 Canada
| | - Ben E. Black
- Department of Biochemistry and Biophysics, Penn Center for Genome Integrity, Epigenetics Institute
- Graduate Program in Biochemistry, Biophysics, Chemical Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19140-6059 USA
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49
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Khan R, Coleman N. Challenges and opportunities in the immunotherapy era: balancing expectations with hope in small-cell lung cancer. Ther Adv Med Oncol 2024; 16:17588359241249627. [PMID: 38765713 PMCID: PMC11102705 DOI: 10.1177/17588359241249627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 04/09/2024] [Indexed: 05/22/2024] Open
Abstract
Small-cell lung cancer (SCLC) is a biologically aggressive subtype of lung cancer, a lethal disease characterized by rapid tumor growth, early relapse, a strong tendency for early widespread metastasis, and high genomic instability, making it a formidable foe in modern oncology practice. While the management of non-SCLC has been revolutionized in the era of immunotherapy, progress in SCLC has been more muted. Recent randomized phase III clinical trials have combined programmed death ligand-1 inhibitors to a chemotherapy backbone and demonstrated improved survival; however, the absolute benefit observed is short months. There is an undeniable urgent need for better responses, better agents, novel therapeutic approaches, and more rational, biomarker-driven clinical trials in SCLC. In this review, we discuss the rationale and current understanding of the biology of SCLC in the modern era of immunotherapy, discuss recent advances in front-line immunotherapeutic approaches that have changed clinical practice globally, provide an overview of some of the challenges and limitations that have staggered immune checkpoint blockade in SCLC, and explore some of the novel immunotherapeutic approaches currently being investigated.
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Affiliation(s)
- Raza Khan
- School of Medicine, Trinity College, Dublin, Ireland
- St James’s Hospital, Dublin, Ireland
- Trinity St James’s Cancer Institute, Dublin, Ireland
| | - Niamh Coleman
- Trinity St James’s Cancer Institute, James Street, D08 NHY1 Dublin, Ireland
- School of Medicine, Trinity College, Dublin, Ireland
- St James’s Hospital, Dublin, Ireland
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50
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Tarsounas M. A PARP1-TIMELESS alliance in cancer therapy. Mol Cell 2024; 84:1824-1825. [PMID: 38759623 DOI: 10.1016/j.molcel.2024.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
In a recent paper in Nature, Petropoulos et al.1 report that PARP1 acts together with the replisome components TIMELESS and TIPIN to protect the genome from transcription-replication conflicts, which has important implications for the clinical use of PARP inhibitors.
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Affiliation(s)
- Madalena Tarsounas
- Genome Stability and Tumourigenesis Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK.
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