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Smith HL, Willmore E, Prendergast L, Curtin NJ. ATR, CHK1 and WEE1 inhibitors cause homologous recombination repair deficiency to induce synthetic lethality with PARP inhibitors. Br J Cancer 2024:10.1038/s41416-024-02745-0. [PMID: 38965423 DOI: 10.1038/s41416-024-02745-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 05/24/2024] [Accepted: 05/31/2024] [Indexed: 07/06/2024] Open
Abstract
PURPOSE PARP inhibitors (PARPi) are effective in homologous recombination repair (HRR) defective (HRD) cancers. To (re)sensitise HRR proficient (HRP) tumours to PARPi combinations with other drugs are being explored. Our aim was to determine the mechanism underpinning the sensitisation to PARPi by inhibitors of cell cycle checkpoint kinases ATR, CHK1 and WEE1. EXPERIMENTAL DESIGN A panel of HRD and HRP cells (including matched BRCA1 or 2 mutant and corrected pairs) and ovarian cancer ascites cells were used. Rucaparib (PARPi) induced replication stress (RS) and HRR (immunofluorescence microscopy for γH2AX and RAD51 foci, respectively), cell cycle changes (flow cytometry), activation of ATR, CHK1 and WEE1 (Western Blot for pCHK1S345, pCHK1S296 and pCDK1Y15, respectively) and cytotoxicity (colony formation assay) was determined, followed by investigations of the impact on all of these parameters by inhibitors of ATR (VE-821, 1 µM), CHK1 (PF-477736, 50 nM) and WEE1 (MK-1775, 100 nM). RESULTS Rucaparib induced RS (3 to10-fold), S-phase accumulation (2-fold) and ATR, CHK1 and WEE1 activation (up to 3-fold), and VE-821, PF-477736 and MK-1775 inhibited their targets and abrogated these rucaparib-induced cell cycle changes in HRP and HRD cells. Rucaparib activated HRR in HRP cells only and was (60-1,000x) more cytotoxic to HRD cells. VE-821, PF-477736 and MK-1775 blocked HRR and sensitised HRP but not HRD cells and primary ovarian ascites to rucaparib. CONCLUSIONS Our data indicate that, rather than acting via abrogation of cell cycle checkpoints, ATR, CHK1 and WEE1 inhibitors cause an HRD phenotype and hence "induced synthetic lethality" with PARPi.
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Affiliation(s)
- Hannah L Smith
- Faculty of Medical Sciences, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK.
| | - Elaine Willmore
- Faculty of Medical Sciences, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK
| | - Lisa Prendergast
- Faculty of Medical Sciences, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK
| | - Nicola J Curtin
- Faculty of Medical Sciences, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK.
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2
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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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3
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Tao L, Xia X, Kong S, Wang T, Fan F, Wang W. Natural pentacyclic triterpenoid from Pristimerin sensitizes p53-deficient tumor to PARP inhibitor by ubiquitination of Chk1. Pharmacol Res 2024; 201:107091. [PMID: 38316371 DOI: 10.1016/j.phrs.2024.107091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 01/18/2024] [Accepted: 01/30/2024] [Indexed: 02/07/2024]
Abstract
Inhibition of checkpoint kinase 1 (Chk1) has shown to overcome resistance to poly (ADP-ribose) polymerase (PARP) inhibitors and expand the clinical utility of PARP inhibitors in a broad range of human cancers. Pristimerin, a naturally occurring pentacyclic triterpenoid, has been the focus of intensive studies for its anticancer potential. However, it is not yet known whether low dose of pristimerin can be combined with PARP inhibitors by targeting Chk1 signaling pathway. In this study, we investigated the efficacy, safety and molecular mechanisms of the synergistic effect produced by the combination olaparib and pristimerin in TP53-deficient and BRCA-proficient cell models. As a result, an increased expression of Chk1 was correlated with TP53 mutation, and pristimerin preferentially sensitized p53-defective cells to olaparib. The combination of olaparib and pristimerin resulted in a more pronounced abrogation of DNA synthesis and induction of DNA double-strand breaks (DSBs). Moreover, pristimerin disrupted the constitutional levels of Chk1 and DSB repair activities. Mechanistically, pristimerin promoted K48-linked polyubiquitination and proteasomal degradation of Chk1 while not affecting its kinase domain and activity. Importantly, combinatorial therapy led to a higher rate of tumor growth inhibition without apparent hematological toxicities. In addition, pristimerin suppressed olaparib-induced upregulation of Chk1 and enhanced olaparib-induced DSB marker γΗ2ΑΧ in vivo. Taken together, inhibition of Chk1 by pristimerin has been observed to induce DNA repair deficiency, which may expand the application of olaparib in BRCA-proficient cancers harboring TP53 mutations. Thus, pristimerin can be combined for PARP inhibitor-based therapy.
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Affiliation(s)
- Li Tao
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Xiangyu Xia
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Shujing Kong
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Tingye Wang
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Fangtian Fan
- Anhui Engineering Technology Research Center of Biochemical Pharmaceuticals, School of Pharmacy, Bengbu Medical College, Bengbu, Anhui 233003, China
| | - Weimin Wang
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China; Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu 214200, China.
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4
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Xu Y, Spear S, Ma Y, Lorentzen MP, Gruet M, McKinney F, Xu Y, Wickremesinghe C, Shepherd MR, McNeish I, Keun HC, Nijhuis A. Pharmacological depletion of RNA splicing factor RBM39 by indisulam synergizes with PARP inhibitors in high-grade serous ovarian carcinoma. Cell Rep 2023; 42:113307. [PMID: 37858464 DOI: 10.1016/j.celrep.2023.113307] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 09/04/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023] Open
Abstract
Ovarian high-grade serous carcinoma (HGSC) is the most common subtype of ovarian cancer with limited therapeutic options and a poor prognosis. In recent years, poly-ADP ribose polymerase (PARP) inhibitors have demonstrated significant clinical benefits, especially in patients with BRCA1/2 mutations. However, acquired drug resistance and relapse is a major challenge. Indisulam (E7070) has been identified as a molecular glue that brings together splicing factor RBM39 and DCAF15 E3 ubiquitin ligase resulting in polyubiquitination, degradation, and subsequent RNA splicing defects. In this work, we demonstrate that the loss of RBM39 induces splicing defects in key DNA damage repair genes in ovarian cancer, leading to increased sensitivity to cisplatin and various PARP inhibitors. The addition of indisulam also improved olaparib response in mice bearing PARP inhibitor-resistant tumors. These findings demonstrate that combining RBM39 degraders and PARP inhibitors is a promising therapeutic approach to improve PARP inhibitor response in ovarian HGSC.
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Affiliation(s)
- Yuewei Xu
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Sarah Spear
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK
| | - Yurui Ma
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Marc P Lorentzen
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK
| | - Michael Gruet
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Flora McKinney
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Yitao Xu
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Chiharu Wickremesinghe
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK
| | | | - Iain McNeish
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK
| | - Hector C Keun
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK.
| | - Anke Nijhuis
- Department of Surgery & Cancer, Imperial College London, London, UK; Ovarian Cancer Action Research Centre, Department of Surgery & Cancer, Imperial College London, London, UK.
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5
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Cordani N, Bianchi T, Ammoni LC, Cortinovis DL, Cazzaniga ME, Lissoni AA, Landoni F, Canova S. An Overview of PARP Resistance in Ovarian Cancer from a Molecular and Clinical Perspective. Int J Mol Sci 2023; 24:11890. [PMID: 37569269 PMCID: PMC10418869 DOI: 10.3390/ijms241511890] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/18/2023] [Accepted: 07/23/2023] [Indexed: 08/13/2023] Open
Abstract
Epithelial ovarian cancer (EOC), a primarily high-grade serous carcinoma (HGSOC), is one of the major causes of high death-to-incidence ratios of all gynecological cancers. Cytoreductive surgery and platinum-based chemotherapy represent the main treatments for this aggressive disease. Molecular characterization of HGSOC has revealed that up to 50% of cases have a deficiency in the homologous recombination repair (HRR) system, which makes these tumors sensitive to poly ADP-ribose inhibitors (PARP-is). However, drug resistance often occurs and overcoming it represents a big challenge. A number of strategies are under investigation, with the most promising being combinations of PARP-is with antiangiogenetic agents and immune checkpoint inhibitors. Moreover, new drugs targeting different pathways, including the ATR-CHK1-WEE1, the PI3K-AKT and the RAS/RAF/MEK, are under development both in phase I and II-III clinical trials. Nevertheless, there is still a long way to go, and the next few years promise to be exciting.
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Affiliation(s)
- Nicoletta Cordani
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
| | - Tommaso Bianchi
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
- Clinic of Obstetrics and Gynecology, Fondazione IRCCS San Gerardo dei Tintori, University of Milano-Bicocca, 20900 Monza, Italy
| | - Luca Carlofrancesco Ammoni
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
| | | | - Marina Elena Cazzaniga
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
- Phase 1 Research Centre, Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy
| | - Andrea Alberto Lissoni
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
- Clinic of Obstetrics and Gynecology, Fondazione IRCCS San Gerardo dei Tintori, University of Milano-Bicocca, 20900 Monza, Italy
| | - Fabio Landoni
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (T.B.); (L.C.A.); (M.E.C.); (A.A.L.); (F.L.)
- Clinic of Obstetrics and Gynecology, Fondazione IRCCS San Gerardo dei Tintori, University of Milano-Bicocca, 20900 Monza, Italy
| | - Stefania Canova
- Medical Oncology Unit, Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy;
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6
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Targeting the DNA damage response for cancer therapy. Biochem Soc Trans 2023; 51:207-221. [PMID: 36606678 PMCID: PMC9988002 DOI: 10.1042/bst20220681] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 01/07/2023]
Abstract
The DNA damage response (DDR) is an elegant system, coordinating DNA repair with cell cycle checkpoints, that evolved to protect living organisms from the otherwise fatal levels of DNA damage inflicted by endogenous and environmental sources. Since many agents used to treat cancer; radiotherapy and cytotoxic chemotherapy, work by damaging DNA the DDR represents a mechanism of resistance. The original rational for the development of drugs to inhibit the DDR was to overcome this mechanism of resistance but clinical studies using this approach have not led to improvements in the therapeutic index. A more exciting approach is to exploit cancer-specific defects in the DDR, that represent vulnerabilities in the tumour and an opportunity to selectively target the tumour. PARP inhibitors (PARPi) selectively kill homologous recombination repair defective (HRD, e.g. through BRCA mutation) cells. This approach has proven successful clinically and there are now six PARPi approved for cancer therapy. Drugs targeting other aspects of the DDR are under pre-clinical and clinical evaluation as monotherapy agents and in combination studies. For this promising approach to cancer therapy to be fully realised reliable biomarkers are needed to identify tumours with the exploitable defect for monotherapy applications. The possibility that some combinations may result in toxicity to normal tissues also needs to be considered. A brief overview of the DDR, the development of inhibitors targeting the DDR and the current clinical status of such drugs is described here.
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Li S, Wang L, Wang Y, Zhang C, Hong Z, Han Z. The synthetic lethality of targeting cell cycle checkpoints and PARPs in cancer treatment. J Hematol Oncol 2022; 15:147. [PMID: 36253861 PMCID: PMC9578258 DOI: 10.1186/s13045-022-01360-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 09/30/2022] [Indexed: 11/17/2022] Open
Abstract
Continuous cell division is a hallmark of cancer, and the underlying mechanism is tumor genomics instability. Cell cycle checkpoints are critical for enabling an orderly cell cycle and maintaining genome stability during cell division. Based on their distinct functions in cell cycle control, cell cycle checkpoints are classified into two groups: DNA damage checkpoints and DNA replication stress checkpoints. The DNA damage checkpoints (ATM-CHK2-p53) primarily monitor genetic errors and arrest cell cycle progression to facilitate DNA repair. Unfortunately, genes involved in DNA damage checkpoints are frequently mutated in human malignancies. In contrast, genes associated with DNA replication stress checkpoints (ATR-CHK1-WEE1) are rarely mutated in tumors, and cancer cells are highly dependent on these genes to prevent replication catastrophe and secure genome integrity. At present, poly (ADP-ribose) polymerase inhibitors (PARPi) operate through “synthetic lethality” mechanism with mutant DNA repair pathways genes in cancer cells. However, an increasing number of patients are acquiring PARP inhibitor resistance after prolonged treatment. Recent work suggests that a combination therapy of targeting cell cycle checkpoints and PARPs act synergistically to increase the number of DNA errors, compromise the DNA repair machinery, and disrupt the cell cycle, thereby increasing the death rate of cancer cells with DNA repair deficiency or PARP inhibitor resistance. We highlight a combinational strategy involving PARP inhibitors and inhibition of two major cell cycle checkpoint pathways, ATM-CHK2-TP53 and ATR-CHK1-WEE1. The biological functions, resistance mechanisms against PARP inhibitors, advances in preclinical research, and clinical trials are also reviewed.
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Affiliation(s)
- Shuangying Li
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Liangliang Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Yuanyuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Changyi Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Zhenya Hong
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Zhiqiang Han
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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Yin C, Kulasekaran M, Roy T, Decker B, Alexander S, Margolis M, Jha RC, Kupfer GM, He AR. Homologous Recombination Repair in Biliary Tract Cancers: A Prime Target for PARP Inhibition? Cancers (Basel) 2022; 14:2561. [PMID: 35626165 PMCID: PMC9140037 DOI: 10.3390/cancers14102561] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/10/2022] [Accepted: 05/14/2022] [Indexed: 01/27/2023] Open
Abstract
Biliary tract cancers (BTCs) are a heterogeneous group of malignancies that make up ~7% of all gastrointestinal tumors. It is notably aggressive and difficult to treat; in fact, >70% of patients with BTC are diagnosed at an advanced, unresectable stage and are not amenable to curative therapy. For these patients, chemotherapy has been the mainstay treatment, providing an inadequate overall survival of less than one year. Despite the boom in targeted therapies over the past decade, only a few targeted agents have been approved in BTCs (i.e., IDH1 and FGFR inhibitors), perhaps in part due to its relatively low incidence. This review will explore current data on PARP inhibitors (PARPi) used in homologous recombination deficiency (HRD), particularly with respect to BTCs. Greater than 28% of BTC cases harbor mutations in genes involved in homologous recombination repair (HRR). We will summarize the mechanisms for PARPi and its role in synthetic lethality and describe select genes in the HRR pathway contributing to HRD. We will provide our rationale for expanding patient eligibility for PARPi use based on literature and anecdotal evidence pertaining to mutations in HRR genes, such as RAD51C, and the potential use of reliable surrogate markers of HRD.
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Affiliation(s)
- Chao Yin
- Ruesch Center for the Cure of Gastrointestinal Cancers, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA; (C.Y.); (M.K.); (T.R.)
| | - Monika Kulasekaran
- Ruesch Center for the Cure of Gastrointestinal Cancers, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA; (C.Y.); (M.K.); (T.R.)
| | - Tina Roy
- Ruesch Center for the Cure of Gastrointestinal Cancers, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA; (C.Y.); (M.K.); (T.R.)
| | - Brennan Decker
- Foundation Medicine, Cambridge, MA 20007, USA; (B.D.); (S.A.); (M.M.)
| | - Sonja Alexander
- Foundation Medicine, Cambridge, MA 20007, USA; (B.D.); (S.A.); (M.M.)
| | - Mathew Margolis
- Foundation Medicine, Cambridge, MA 20007, USA; (B.D.); (S.A.); (M.M.)
| | - Reena C. Jha
- Department of Radiology, Georgetown University Medical Center, Washington, DC 20007, USA;
| | - Gary M. Kupfer
- Departments of Oncology and Pediatrics, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA;
| | - Aiwu R. He
- Ruesch Center for the Cure of Gastrointestinal Cancers, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA; (C.Y.); (M.K.); (T.R.)
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9
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Misek SA, Foda BM, Dexheimer TS, Akram M, Conrad SE, Schmidt JC, Neubig RR, Gallo KA. BRAF Inhibitor Resistance Confers Increased Sensitivity to Mitotic Inhibitors. Front Oncol 2022; 12:766794. [PMID: 35444937 PMCID: PMC9015667 DOI: 10.3389/fonc.2022.766794] [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: 08/30/2021] [Accepted: 02/22/2022] [Indexed: 11/13/2022] Open
Abstract
Single agent and combination therapy with BRAFV600E/K and MEK inhibitors have remarkable efficacy against melanoma tumors with activating BRAF mutations, but in most cases BRAF inhibitor (BRAFi) resistance eventually develops. One resistance mechanism is reactivation of the ERK pathway. However, only about half of BRAFi resistance is due to ERK reactivation. The purpose of this study is to uncover pharmacological vulnerabilities of BRAFi-resistant melanoma cells, with the goal of identifying new therapeutic options for patients whose tumors have developed resistance to BRAFi/MEKi therapy. We screened a well-annotated compound library against a panel of isogenic pairs of parental and BRAFi-resistant melanoma cell lines to identify classes of compounds that selectively target BRAFi-resistant cells over their BRAFi-sensitive counterparts. Two distinct patterns of increased sensitivity to classes of pharmacological inhibitors emerged. In two cell line pairs, BRAFi resistance conferred increased sensitivity to compounds that share the property of cell cycle arrest at M-phase, including inhibitors of aurora kinase (AURK), polo-like kinase (PLK), tubulin, and kinesin. Live cell microscopy, used to track mitosis in real time, revealed that parental but not BRAFi-resistant melanoma cells were able to exit from compound-induced mitotic arrest through mitotic slippage, thus escaping death. Consistent with the key role of Cyclin B1 levels in regulating mitosis at the spindle checkpoint in arrested cells, we found lower Cyclin B1 levels in parental compared with BRAFi-resistant melanoma cells, suggesting that inability to down-regulate Cyclin B1 expression levels may explain the increased vulnerability of resistant cells to mitotic inhibitors. Another BRAFi-resistant cell line showed increased sensitivity to Chk1/2 inhibitors, which was associated with an accumulation of DNA damage, resulting in mitotic failure. This study demonstrates that BRAFi-resistance, in at least a subset of melanoma cells, confers vulnerability to pharmacological disruption of mitosis and suggests a targeted synthetic lethal approach for overcoming resistance to BRAF/MEK-directed therapies.
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Affiliation(s)
- Sean A Misek
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Bardees M Foda
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,Molecular Genetics and Enzymology Department, National Research Centre, Dokki, Egypt
| | - Thomas S Dexheimer
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States
| | - Maisah Akram
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States
| | - Susan E Conrad
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
| | - Jens C Schmidt
- Department of Obstetrics, Gynecology and Reproductive Biology, Michigan State University, East Lansing, MI, United States.,Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, United States
| | - Richard R Neubig
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, United States.,"Nicholas V. Perricone, M.D.", Division of Dermatology, Department of Medicine, Michigan State University, East Lansing, MI, United States
| | - Kathleen A Gallo
- Department of Physiology, Michigan State University, East Lansing, MI, United States
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10
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Luo L, Keyomarsi K. PARP inhibitors as single agents and in combination therapy: the most promising treatment strategies in clinical trials for BRCA-mutant ovarian and triple-negative breast cancers. Expert Opin Investig Drugs 2022; 31:607-631. [PMID: 35435784 DOI: 10.1080/13543784.2022.2067527] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Poly (ADP-ribose) polymerase inhibitors (PARPis) are an exciting class of agents that have shown efficacy, particularly for BRCA-mutant triple-negative breast cancer (TNBC) and high-grade serous ovarian cancer (HGSOC). However, most patients who receive PARPi as their standard of care therapy inevitably develop resistance and this underscores the need to identify additional targets that can circumvent such resistance. Combination treatment strategies have been developed in preclinical and clinical studies to address the challenges of efficacy and resistance. AREAS COVERED This review examines completed or ongoing clinical trials of PARPi mono- and combination therapies. PARPi monotherapy in HER2 negative breast (HR+ and TNBC subtypes) and ovarian cancer is a focal point. The authors propose potential strategies that might overcome resistance to PARPi and discuss key questions and future directions. EXPERT OPINION While the advent of PARPis has significantly improved the treatment of tumors with defects in DNA damage and repair pathways, careful patient selection will be essential to enhance these treatments. The identification of molecular biomarkers to predict disease response and progression is an endeavor.
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Affiliation(s)
- Linjie Luo
- Department of Experimental Radiation Oncology, the University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Khandan Keyomarsi
- Department of Experimental Radiation Oncology, the University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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11
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van Doorn CLR, Steenbergen SAM, Walburg KV, Ottenhoff THM. Pharmacological Poly (ADP-Ribose) Polymerase Inhibitors Decrease Mycobacterium tuberculosis Survival in Human Macrophages. Front Immunol 2021; 12:712021. [PMID: 34899683 PMCID: PMC8662539 DOI: 10.3389/fimmu.2021.712021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 11/12/2021] [Indexed: 02/04/2023] Open
Abstract
Diabetes mellites (DM) is correlated with increased susceptibility to and disease progression of tuberculosis (TB), and strongly impairs effective global TB control measures. To better control the TB-DM co-epidemic, unravelling the bidirectional interactivity between DM-associated molecular processes and immune responses to Mycobacterium tuberculosis (Mtb) is urgently required. Since poly (ADP-ribose) polymerase (PARP) activation has been associated with DM and with Mtb infection in mouse models, we have investigated whether PARP inhibition by pharmacological compounds can interfere with host protection against Mtb in human macrophage subsets, the predominant target cell of Mtb. Pharmacological inhibition of PARP decreased intracellular Mtb and MDR-Mtb levels in human macrophages, identifying PARP as a potential target for host-directed therapy against Mtb. PARP inhibition was associated with modified chemokine secretion and upregulation of cell surface activation markers by human macrophages. Targeting LDH, a secondary target of the PARP inhibitor rucaparib, resulted in decreased intracellular Mtb, suggesting a metabolic role in rucaparib-induced control of Mtb. We conclude that pharmacological inhibition of PARP is a potential novel strategy in developing innovative host-directed therapies against intracellular bacterial infections.
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12
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Arena A, Gilardini Montani MS, Romeo MA, Benedetti R, Gaeta A, Cirone M. DNA damage triggers an interplay between wtp53 and c-Myc affecting lymphoma cell proliferation and Kaposi sarcoma herpesvirus replication. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1869:119168. [PMID: 34728235 DOI: 10.1016/j.bbamcr.2021.119168] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 11/27/2022]
Abstract
The induction of DNA damage together with the interference with DNA repair represents a promising strategy in cancer treatment. Here we show that the PARP-1/2/3 inhibitor AZD2461 in combination with the CHK1 inhibitor UCN-01 altered the DNA damage response and reduced cell proliferation in PEL cells, an aggressive B cell lymphoma highly resistant to chemotherapies. AZD2461/UCN-01 combination activated p53/p21 and downregulated c-Myc in these cells, leading to a reduced expression level of RAD51, molecule involved in DNA repair. The effect of AZD2461/UCN-01 on c-Myc and p53/p21 was inter-dependent and, besides impairing cell proliferation, contributed to the activation of the replicative cycle of KSHV, carried in a latent state in PEL cells. Finally, we found that the pharmacological or genetic inhibition of p21 counteracted the viral lytic cycle activation and further reduced PEL cell proliferation, suggesting that it could induce a double beneficial effect in this setting. This study unveils that, therapeutic approaches, based on the induction of DNA damage and the reduction of DNA repair, could be used to successfully treat this malignant lymphoma.
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Affiliation(s)
- Andrea Arena
- Department of Experimental Medicine, "Sapienza" University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
| | - Maria Saveria Gilardini Montani
- Department of Experimental Medicine, "Sapienza" University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
| | - Maria Anele Romeo
- Department of Experimental Medicine, "Sapienza" University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
| | - Rossella Benedetti
- Department of Experimental Medicine, "Sapienza" University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
| | - Aurelia Gaeta
- Department of Molecular Medicine, "Sapienza" University of Rome, Rome, Italy
| | - Mara Cirone
- Department of Experimental Medicine, "Sapienza" University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy..
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13
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Bradbury M, Borràs E, Pérez-Benavente A, Gil-Moreno A, Santamaria A, Sabidó E. Proteomic Studies on the Management of High-Grade Serous Ovarian Cancer Patients: A Mini-Review. Cancers (Basel) 2021; 13:cancers13092067. [PMID: 33922979 PMCID: PMC8123279 DOI: 10.3390/cancers13092067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/14/2021] [Accepted: 04/22/2021] [Indexed: 01/23/2023] Open
Abstract
High-grade serous ovarian cancer (HGSC) remains the most common and deadly subtype of ovarian cancer. It is characterized by its late diagnosis and frequent relapse despite standardized treatment with cytoreductive surgery and platinum-based chemotherapy. The past decade has seen significant advances in the clinical management and molecular understanding of HGSC following the publication of the Cancer Genome Atlas (TCGA) researchers and the introduction of targeted therapies with anti-angiogenic drugs and poly(ADP-ribose) polymerase inhibitors in specific subgroups of patients. We provide a comprehensive review of HGSC, focusing on the most important molecular advances aimed at providing a better understanding of the disease and its response to treatment. We emphasize the role that proteomic technologies are now playing in these two aspects of the disease, through the identification of proteins and their post-translational modifications in ovarian cancer tumors. Finally, we highlight how the integration of proteomics with genomics, exemplified by the work performed by the Clinical Proteomic Tumor Analysis Consortium (CPTAC), can guide the development of new biomarkers and therapeutic targets.
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Affiliation(s)
- Melissa Bradbury
- Centre de Regulació Genòmica, Barcelona Institute of Science and Technology (BIST), Dr Aiguader 88, 08003 Barcelona, Spain; (M.B.); (E.B.)
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr Aiguader 88, 08003 Barcelona, Spain
- Biomedical Research Group in Gynecology, Vall d’Hebron Institut de Recerca, Vall d’Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (A.P.-B.); (A.G.-M.)
- Gynecologic Oncology Unit, Department of Gynecology, Hospital Universitari Vall d’Hebron, Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
| | - Eva Borràs
- Centre de Regulació Genòmica, Barcelona Institute of Science and Technology (BIST), Dr Aiguader 88, 08003 Barcelona, Spain; (M.B.); (E.B.)
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr Aiguader 88, 08003 Barcelona, Spain
| | - Assumpció Pérez-Benavente
- Biomedical Research Group in Gynecology, Vall d’Hebron Institut de Recerca, Vall d’Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (A.P.-B.); (A.G.-M.)
- Gynecologic Oncology Unit, Department of Gynecology, Hospital Universitari Vall d’Hebron, Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
| | - Antonio Gil-Moreno
- Biomedical Research Group in Gynecology, Vall d’Hebron Institut de Recerca, Vall d’Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (A.P.-B.); (A.G.-M.)
- Gynecologic Oncology Unit, Department of Gynecology, Hospital Universitari Vall d’Hebron, Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red (CIBERONC), Instituto de Salud Carlos III, Avenida de Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Anna Santamaria
- Biomedical Research Group in Gynecology, Vall d’Hebron Institut de Recerca, Vall d’Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (A.P.-B.); (A.G.-M.)
- Cell Cycle and Cancer Laboratory, Biomedical Research Group in Urology, Vall Hebron Institut de Recerca, Vall d’Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
- Correspondence: (A.S.); (E.S.)
| | - Eduard Sabidó
- Centre de Regulació Genòmica, Barcelona Institute of Science and Technology (BIST), Dr Aiguader 88, 08003 Barcelona, Spain; (M.B.); (E.B.)
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr Aiguader 88, 08003 Barcelona, Spain
- Correspondence: (A.S.); (E.S.)
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14
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Yip HYK, Papa A. Signaling Pathways in Cancer: Therapeutic Targets, Combinatorial Treatments, and New Developments. Cells 2021; 10:659. [PMID: 33809714 PMCID: PMC8002322 DOI: 10.3390/cells10030659] [Citation(s) in RCA: 203] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 12/13/2022] Open
Abstract
Molecular alterations in cancer genes and associated signaling pathways are used to inform new treatments for precision medicine in cancer. Small molecule inhibitors and monoclonal antibodies directed at relevant cancer-related proteins have been instrumental in delivering successful treatments of some blood malignancies (e.g., imatinib with chronic myelogenous leukemia (CML)) and solid tumors (e.g., tamoxifen with ER positive breast cancer and trastuzumab for HER2-positive breast cancer). However, inherent limitations such as drug toxicity, as well as acquisition of de novo or acquired mechanisms of resistance, still cause treatment failure. Here we provide an up-to-date review of the successes and limitations of current targeted therapies for cancer treatment and highlight how recent technological advances have provided a new level of understanding of the molecular complexity underpinning resistance to cancer therapies. We also raise three basic questions concerning cancer drug discovery based on molecular markers and alterations of selected signaling pathways, and further discuss how combination therapies may become the preferable approach over monotherapy for cancer treatments. Finally, we consider novel therapeutic developments that may complement drug delivery and significantly improve clinical response and outcomes of cancer patients.
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Affiliation(s)
| | - Antonella Papa
- Cancer Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia;
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15
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Curtin N, Bai P. PARPs, PAR and NAD Metabolism and Their Inhibitors in Cancer. Cancers (Basel) 2020; 12:cancers12123494. [PMID: 33255262 PMCID: PMC7760776 DOI: 10.3390/cancers12123494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/19/2020] [Indexed: 01/15/2023] Open
Abstract
The role of poly(ADP-ribose) polymerase-1 (PARP1) in DNA repair and as a potential target for anticancer therapy has been under investigation for more than 50 years [...].
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Affiliation(s)
- Nicola Curtin
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
- Correspondence: (N.C.); (P.B.); Tel.: +36-52-412-345 (P.B.); Fax: +36-52-412-566 (P.B.)
| | - Péter Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
- MTA-DE Lendület Laboratory of Cellular Metabolism, 4032 Debrecen, Hungary
- Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
- Correspondence: (N.C.); (P.B.); Tel.: +36-52-412-345 (P.B.); Fax: +36-52-412-566 (P.B.)
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16
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Yusoh NA, Ahmad H, Gill MR. Combining PARP Inhibition with Platinum, Ruthenium or Gold Complexes for Cancer Therapy. ChemMedChem 2020; 15:2121-2135. [PMID: 32812709 PMCID: PMC7754470 DOI: 10.1002/cmdc.202000391] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Indexed: 12/24/2022]
Abstract
Platinum drugs are heavily used first-line chemotherapeutic agents for many solid tumours and have stimulated substantial interest in the biological activity of DNA-binding metal complexes. These complexes generate DNA lesions which trigger the activation of DNA damage response (DDR) pathways that are essential to maintain genomic integrity. Cancer cells exploit this intrinsic DNA repair network to counteract many types of chemotherapies. Now, advances in the molecular biology of cancer has paved the way for the combination of DDR inhibitors such as poly (ADP-ribose) polymerase (PARP) inhibitors (PARPi) and agents that induce high levels of DNA replication stress or single-strand break damage for synergistic cancer cell killing. In this review, we summarise early-stage, preclinical and clinical findings exploring platinum and emerging ruthenium anti-cancer complexes alongside PARPi in combination therapy for cancer and also describe emerging work on the ability of ruthenium and gold complexes to directly inhibit PARP activity.
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Affiliation(s)
- Nur Aininie Yusoh
- Department of ChemistryFaculty of ScienceUniversiti Putra Malaysia43400 UPMSerdang, SelangorMalaysia
| | - Haslina Ahmad
- Department of ChemistryFaculty of ScienceUniversiti Putra Malaysia43400 UPMSerdang, SelangorMalaysia
- Integrated Chemical BiophysicsFaculty of ScienceUniversiti Putra Malaysia43400 UPMSerdang, SelangorMalaysia
| | - Martin R. Gill
- Department of ChemistrySwansea UniversitySwanseaWales (UK
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17
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Neizer-Ashun F, Bhattacharya R. Reality CHEK: Understanding the biology and clinical potential of CHK1. Cancer Lett 2020; 497:202-211. [PMID: 32991949 DOI: 10.1016/j.canlet.2020.09.016] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/26/2020] [Accepted: 09/20/2020] [Indexed: 12/13/2022]
Abstract
The DNA damage response enables cells to cope with various stresses that threaten genomic integrity. A critical component of this response is the serine/threonine kinase CHK1 which is encoded by the CHEK1 gene. Originally identified as a regulator of the G2/M checkpoint, CHK1 has since been shown to play important roles in DNA replication, mitotic progression, DNA repair, and overall cell cycle regulation. However, the potential of CHK1 as a cancer therapy has not been realized clinically. Herein we expound our current understanding of the principal roles of CHK1 and highlight different avenues for CHK1 targeting in cancer therapy.
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Affiliation(s)
- Fiifi Neizer-Ashun
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, OK, 73104, United States
| | - Resham Bhattacharya
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, OK, 73104, United States; Department of Obstetrics and Gynecology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104, United States; Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Science Center, Oklahoma City, OK, 73104, United States.
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