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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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2
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Wu S, Yao X, Sun W, Jiang K, Hao J. Exploration of poly (ADP-ribose) polymerase inhibitor resistance in the treatment of BRCA1/2-mutated cancer. Genes Chromosomes Cancer 2024; 63:e23243. [PMID: 38747337 DOI: 10.1002/gcc.23243] [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: 04/19/2024] [Indexed: 05/21/2024] Open
Abstract
Breast cancer susceptibility 1/2 (BRCA1/2) genes play a crucial role in DNA damage repair, yet mutations in these genes increase the susceptibility to tumorigenesis. Exploiting the synthetic lethality mechanism between BRCA1/2 mutations and poly(ADP-ribose) polymerase (PARP) inhibition has led to the development and clinical approval of PARP inhibitor (PARPi), representing a milestone in targeted therapy for BRCA1/2 mutant tumors. This approach has paved the way for leveraging synthetic lethality in tumor treatment strategies. Despite the initial success of PARPis, resistance to these agents diminishes their efficacy in BRCA1/2-mutant tumors. Investigations into PARPi resistance have identified replication fork stability and homologous recombination repair as key factors sensitive to PARPis. Additionally, studies suggest that replication gaps may also confer sensitivity to PARPis. Moreover, emerging evidence indicates a correlation between PARPi resistance and cisplatin resistance, suggesting a potential overlap in the mechanisms underlying resistance to both agents. Given these findings, it is imperative to explore the interplay between replication gaps and PARPi resistance, particularly in the context of platinum resistance. Understanding the impact of replication gaps on PARPi resistance may offer insights into novel therapeutic strategies to overcome resistance mechanisms and enhance the efficacy of targeted therapies in BRCA1/2-mutant tumors.
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Affiliation(s)
- Shuyi Wu
- School of Life Sciences, Zhejiang Chinese Medicine University, HangZhou, China
| | - Xuanjie Yao
- The Fourth Clinical Medical College, Zhejiang Chinese Medicine University, HangZhou, China
| | - Weiwei Sun
- School of Life Sciences, Zhejiang Chinese Medicine University, HangZhou, China
| | - Kaitao Jiang
- School of Life Sciences, Zhejiang Chinese Medicine University, HangZhou, China
| | - Jie Hao
- School of Life Sciences, Zhejiang Chinese Medicine University, HangZhou, China
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3
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Sasaki Y, Inouchi T, Nakatsuka R, Inoue A, Masutani M, Nozaki T. Activated NAD+ biosynthesis pathway induces olaparib resistance in BRCA1 knockout pancreatic cancer cells. PLoS One 2024; 19:e0302130. [PMID: 38625917 PMCID: PMC11020856 DOI: 10.1371/journal.pone.0302130] [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: 07/13/2023] [Accepted: 03/28/2024] [Indexed: 04/18/2024] Open
Abstract
PARP inhibitors have been developed as anti-cancer agents based on synthetic lethality in homologous recombination deficient cancer cells. However, resistance to PARP inhibitors such as olaparib remains a problem in clinical use, and the mechanisms of resistance are not fully understood. To investigate mechanisms of PARP inhibitor resistance, we established a BRCA1 knockout clone derived from the pancreatic cancer MIA PaCa-2 cells, which we termed C1 cells, and subsequently isolated an olaparib-resistant C1/OLA cells. We then performed RNA-sequencing and pathway analysis on olaparib-treated C1 and C1/OLA cells. Our results revealed activation of cell signaling pathway related to NAD+ metabolism in the olaparib-resistant C1/OLA cells, with increased expression of genes encoding the NAD+ biosynthetic enzymes NAMPT and NMNAT2. Moreover, intracellular NAD+ levels were significantly higher in C1/OLA cells than in the non-olaparib-resistant C1 cells. Upregulation of intracellular NAD+ levels by the addition of nicotinamide also induced resistance to olaparib and talazoparib in C1 cells. Taken together, our findings suggest that upregulation of intracellular NAD+ is one of the factors underlying the acquisition of PARP inhibitor resistance.
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Affiliation(s)
- Yuka Sasaki
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, Hirakata, Osaka, Japan
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Takuma Inouchi
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, Hirakata, Osaka, Japan
| | - Ryusuke Nakatsuka
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, Hirakata, Osaka, Japan
| | - Amane Inoue
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, Hirakata, Osaka, Japan
| | - Mitsuko Masutani
- Department of Molecular and Genomic Biomedicine, Center for Bioinformatics and Molecular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Tadashige Nozaki
- Department of Pharmacology, Faculty of Dentistry, Osaka Dental University, Hirakata, Osaka, Japan
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Concannon K, Morris BB, Gay CM, Byers LA. Combining targeted DNA repair inhibition and immune-oncology approaches for enhanced tumor control. Mol Cell 2023; 83:660-680. [PMID: 36669489 PMCID: PMC9992136 DOI: 10.1016/j.molcel.2022.12.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 12/08/2022] [Accepted: 12/27/2022] [Indexed: 01/20/2023]
Abstract
Targeted therapy and immunotherapy have revolutionized cancer treatment. However, the ability of cancer to evade the immune system remains a major barrier for effective treatment. Related to this, several targeted DNA-damage response inhibitors (DDRis) are being tested in the clinic and have been shown to potentiate anti-tumor immune responses. Seminal studies have shown that these agents are highly effective in a pan-cancer class of tumors with genetic defects in key DNA repair genes such as BRCA1/2, BRCA-related genes, ataxia telangiectasia mutated (ATM), and others. Here, we review the molecular consequences of targeted DDR inhibition, from tumor cell death to increased engagement of the anti-tumor immune response. Additionally, we discuss mechanistic and clinical rationale for pairing targeted DDRis with immunotherapy for enhanced tumor control. We also review biomarkers for patient selection and promising new immunotherapy approaches poised to form the foundation of next-generation DDRi and immunotherapy combinations.
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Affiliation(s)
- Kyle Concannon
- Department of Hematology/Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Benjamin B Morris
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Carl M Gay
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Lauren A Byers
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
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5
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O'Connor MJ, Forment JV. Mechanisms of PARP Inhibitor Resistance. Cancer Treat Res 2023; 186:25-42. [PMID: 37978129 DOI: 10.1007/978-3-031-30065-3_3] [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] [Indexed: 11/19/2023]
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPi) represent the first medicines based on the targeting of the DNA damage response (DDR). PARPi have become standard of care for first-line maintenance treatment in ovarian cancer and have also been approved in other cancer indications including breast, pancreatic and prostate. Despite their efficacy, resistance to PARPi has been reported clinically and represents a growing patient population with unmet clinical need. Here, we describe the various mechanisms of PARPi resistance that have been identified in pre-clinical models and in the clinic.
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Affiliation(s)
- Mark J O'Connor
- Oncology R&D, AstraZeneca, Discovery Centre, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge, CB2 0AA, UK.
| | - Josep V Forment
- Oncology R&D, AstraZeneca, Discovery Centre, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge, CB2 0AA, UK
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Nakamura T, Kajihara N, Hama N, Kobayashi T, Otsuka R, Han N, Wada H, Hasegawa Y, Suzuki N, Seino KI. Interleukin-34 cancels anti-tumor immunity by PARP inhibitor. J Gynecol Oncol 2022; 34:e25. [PMID: 36603850 PMCID: PMC10157335 DOI: 10.3802/jgo.2023.34.e25] [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: 06/23/2022] [Revised: 10/05/2022] [Accepted: 11/30/2022] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Breast cancer susceptibility gene 1 (BRCA1)-associated ovarian cancer patients have been treated with A poly (ADP-ribose) polymerase (PARP) inhibitor, extending the progression-free survival; however, they finally acquire therapeutic resistance. Interleukin (IL)-34 has been reported as a poor prognostic factor in several cancers, including ovarian cancer, and it contributes to the therapeutic resistance of chemotherapies. IL-34 may affect the therapeutic effect of PARP inhibitor through the regulation of tumor microenvironment (TME). METHODS In this study, The Cancer Genome Atlas (TCGA) data set was used to evaluate the prognosis of IL-34 and human ovarian serous carcinoma. We also used CRISPR-Cas9 genome editing technology in a mouse model to evaluate the efficacy of PARP inhibitor therapy in the presence or absence of IL-34. RESULTS We found that IL34 was an independent poor prognostic factor in ovarian serous carcinoma, and its high expression significantly shortens overall survival. Furthermore, in BRCA1-associated ovarian cancer, PARP inhibitor therapy contributes to anti-tumor immunity via the XCR1+ DC-CD8+ T cell axis, however, it is canceled by the presence of IL-34. CONCLUSION These results suggest that tumor-derived IL-34 benefits tumors by creating an immunosuppressive TME and conferring PARP inhibitor therapeutic resistance. Thus, we showed the pathological effect of IL-34 and the need for it as a therapeutic target in ovarian cancer.
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Affiliation(s)
- Takayoshi Nakamura
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.,Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Nabeel Kajihara
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Naoki Hama
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Takuto Kobayashi
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Ryo Otsuka
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Nanumi Han
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Haruka Wada
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshinori Hasegawa
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Japan
| | - Nao Suzuki
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Ken-Ichiro Seino
- Division of Immunobiology, Graduate School of Medicine, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.
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7
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Huang TT, Burkett SS, Tandon M, Yamamoto TM, Gupta N, Bitler BG, Lee JM, Nair JR. Distinct roles of treatment schemes and BRCA2 on the restoration of homologous recombination DNA repair and PARP inhibitor resistance in ovarian cancer. Oncogene 2022; 41:5020-5031. [PMID: 36224341 PMCID: PMC9669252 DOI: 10.1038/s41388-022-02491-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/09/2022]
Abstract
Poly (ADP-ribose) polymerase inhibitors (PARPis) represent a major advance in ovarian cancer, now as a treatment and as a maintenance therapy in the upfront and recurrent settings. However, patients often develop resistance to PARPis, underlining the importance of dissecting resistance mechanisms. Here, we report different dosing/timing schemes of PARPi treatment in BRCA2-mutant PEO1 cells, resulting in the simultaneous development of distinct resistance mechanisms. PARPi-resistant variants PEO1/OlaJR, established by higher initial doses and short-term PARPi treatment, develops PARPi resistance by rapidly restoring functional BRCA2 and promoting drug efflux activity. In contrast, PEO1/OlaR, developed by lower initial doses with long-term PARPi exposure, shows no regained BRCA2 function but a mesenchymal-like phenotype with greater invasion ability, and exhibits activated ATR/CHK1 and suppressed EZH2/MUS81 signaling cascades to regain HR repair and fork stabilization, respectively. Our study suggests that PARPi resistance mechanisms can be governed by treatment strategies and have a molecular basis on BRCA2 functionality. Further, we define different mechanisms that may serve as useful biomarkers to assess subsequent treatment strategies in PARPi-resistant ovarian cancer.
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Affiliation(s)
- Tzu-Ting Huang
- Women's Malignancies Branch (WMB), Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD, USA
| | | | - Mayank Tandon
- Center for Cancer Research Collaborative Bioinformatics Resource, CCR, NCI, NIH, Bethesda, MD, USA
| | - Tomomi M Yamamoto
- Department of OB/GYN, Division of Reproductive Sciences, The University of Colorado, Aurora, CO, USA
| | - Nitasha Gupta
- Women's Malignancies Branch (WMB), Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Benjamin G Bitler
- Department of OB/GYN, Division of Reproductive Sciences, The University of Colorado, Aurora, CO, USA
| | - Jung-Min Lee
- Women's Malignancies Branch (WMB), Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD, USA.
| | - Jayakumar R Nair
- Women's Malignancies Branch (WMB), Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD, USA
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8
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Targeting Homologous Recombination Deficiency in Ovarian Cancer with PARP Inhibitors: Synthetic Lethal Strategies That Impact Overall Survival. Cancers (Basel) 2022; 14:cancers14194621. [PMID: 36230543 PMCID: PMC9563432 DOI: 10.3390/cancers14194621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/09/2022] [Accepted: 09/21/2022] [Indexed: 11/23/2022] Open
Abstract
Simple Summary Synthetic lethality approaches to cancer therapy involves combining events to cause cancer cell death. Using this strategy, major advances have occurred in the treatment of women with ovarian cancer who have defects in the Homologous Recombination Repair (HRR) pathway. When the HRR pathway is defective, due to mutations or epigenetic changes in genes such as BRCA1 or BRCA2, cells can no longer accurately repair double strand breaks (DSBs). Capitalising on this weakness, pharmacological inhibition of poly (ADP-ribose) polymerase (PARP) that function to repair single strand breaks (SSBs) leads to synthetic lethality in cells with defective HRR. PARP inhibitors (PARPis) including olaparib, niraparib and rucaparib are approved for the clinical management of women with ovarian cancer. Understanding and overcoming issues of acquired resistance to PARPis, extending these strategies to benefit more patients and combining PARPis with other drugs, including immunotherapies, are of high priority in the field today. Abstract The advent of molecular targeted therapies has made a significant impact on survival of women with ovarian cancer who have defects in homologous recombination repair (HRR). High-grade serous ovarian cancer (HGSOC) is the most common histological subtype of ovarian cancer, with over 50% displaying defective HRR. Poly ADP ribose polymerases (PARPs) are a family of enzymes that catalyse the transfer of ADP-ribose to target proteins, functioning in fundamental cellular processes including transcription, chromatin remodelling and DNA repair. In cells with deficient HRR, PARP inhibitors (PARPis) cause synthetic lethality leading to cell death. Despite the major advances that PARPis have heralded for women with ovarian cancer, questions and challenges remain, including: can the benefits of PARPis be brought to a wider range of women with ovarian cancer; can other drugs in clinical use function in a similar way or with greater efficacy than currently clinically approved PARPis; what can we learn from long-term responders to PARPis; can PARPis sensitise ovarian cancer cells to immunotherapy; and can synthetic lethal strategies be employed more broadly to develop new therapies for women with ovarian cancer. We examine these, and other, questions with focus on improving outcomes for women with ovarian cancer.
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Xu Q, Liu X, Mohseni G, Hao X, Ren Y, Xu Y, Gao H, Wang Q, Wang Y. Mechanism research and treatment progress of NAD pathway related molecules in tumor immune microenvironment. Cancer Cell Int 2022; 22:242. [PMID: 35906622 PMCID: PMC9338646 DOI: 10.1186/s12935-022-02664-1] [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: 06/13/2022] [Accepted: 07/19/2022] [Indexed: 11/21/2022] Open
Abstract
Nicotinamide adenine dinucleotide (NAD) is the core of cellular energy metabolism. NAMPT, Sirtuins, PARP, CD38, and other molecules in this classic metabolic pathway affect many key cellular functions and are closely related to the occurrence and development of many diseases. In recent years, several studies have found that these molecules can regulate cell energy metabolism, promote the release of related cytokines, induce the expression of neoantigens, change the tumor immune microenvironment (TIME), and then play an anticancer role. Drugs targeting these molecules are under development or approved for clinical use. Although there are some side effects and drug resistance, the discovery of novel drugs, the development of combination therapies, and the application of new technologies provide solutions to these challenges and improve efficacy. This review presents the mechanisms of action of NAD pathway-related molecules in tumor immunity, advances in drug research, combination therapies, and some new technology-related therapies.
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Affiliation(s)
- QinChen Xu
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Xiaoyan Liu
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Ghazal Mohseni
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Xiaodong Hao
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Yidan Ren
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Yiwei Xu
- Marine College, Shandong University, 264209, Weihai, China
| | - Huiru Gao
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China
| | - Qin Wang
- Department of Anesthesiology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhua Xi Road, Jinan, 250012, Shandong, China.
| | - Yunshan Wang
- Department of Clinical Laboratory, The Second Hospital of Shandong University, 247 Beiyuan Street, 250033, Jinan, Shandong, China.
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10
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Insights into the Possible Molecular Mechanisms of Resistance to PARP Inhibitors. Cancers (Basel) 2022; 14:cancers14112804. [PMID: 35681784 PMCID: PMC9179506 DOI: 10.3390/cancers14112804] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary The increasingly wide use of PARP inhibitors in breast, ovarian, pancreatic, and prostate cancers harbouring a pathogenic variant in BRCA1 or BRCA2 has highlighted the problem of resistance to therapy. This review summarises the complex interactions between PARP1, cell cycle regulation, response to stress replication, homologous recombination, and other DNA damage repair pathways in the setting of BRCA1/2 mutated cancers that could explain the development of primary or secondary resistance to PARP inhibitors. Abstract PARP1 enzyme plays an important role in DNA damage recognition and signalling. PARP inhibitors are approved in breast, ovarian, pancreatic, and prostate cancers harbouring a pathogenic variant in BRCA1 or BRCA2, where PARP1 inhibition results mainly in synthetic lethality in cells with impaired homologous recombination. However, the increasingly wide use of PARP inhibitors in clinical practice has highlighted the problem of resistance to therapy. Several different mechanisms of resistance have been proposed, although only the acquisition of secondary mutations in BRCA1/2 has been clinically proved. The aim of this review is to outline the key molecular findings that could explain the development of primary or secondary resistance to PARP inhibitors, analysing the complex interactions between PARP1, cell cycle regulation, PI3K/AKT signalling, response to stress replication, homologous recombination, and other DNA damage repair pathways in the setting of BRCA1/2 mutated cancers.
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11
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O’Sullivan Coyne G, Karlovich C, Wilsker D, Voth AR, Parchment RE, Chen AP, Doroshow JH. PARP Inhibitor Applicability: Detailed Assays for Homologous Recombination Repair Pathway Components. Onco Targets Ther 2022; 15:165-180. [PMID: 35237050 PMCID: PMC8885121 DOI: 10.2147/ott.s278092] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/26/2022] [Indexed: 12/19/2022] Open
Abstract
Poly(ADP-ribose) polymerase inhibitors (PARPi) have been in clinical use since 2014 for certain patients with germline BRCA1/2 mutations, but as evidence and approvals for their use in a wider range of patients grow, the question of how best to identify patients who would benefit from PARPi becomes ever more complex. Here, we discuss the development and current state of approved selection testing for PARPi therapy and the ongoing efforts to define a broader range of homologous recombination repair deficiencies that are susceptible to PARP inhibition.
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Affiliation(s)
- Geraldine O’Sullivan Coyne
- Early Clinical Trials Development Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Chris Karlovich
- Leidos Biomedical Research Inc, Molecular Characterization Laboratory, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Deborah Wilsker
- Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Andrea Regier Voth
- Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Ralph E Parchment
- Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Alice P Chen
- Early Clinical Trials Development Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - James H Doroshow
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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12
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Raikwar S, Jain A, Saraf S, Bidla PD, Panda PK, Tiwari A, Verma A, Jain SK. Opportunities in combinational chemo-immunotherapy for breast cancer using nanotechnology: an emerging landscape. Expert Opin Drug Deliv 2022; 19:247-268. [PMID: 35184620 DOI: 10.1080/17425247.2022.2044785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Breast carcinoma (BC) is one of the most frequent causes of cancer-related death among women, which is due to the poor response to conventional therapy. There are several complications associated with monotherapy for cancer, such as cytotoxicity to normal cells, multidrug resistance (MDR), side effects, and limited applications. To overcome these challenges, a combination of chemotherapy and immunotherapy (monoclonal antibodies, anticancer vaccines, checkpoint inhibitors, and cytokines) has been introduced. Drug delivery systems (DDSs) based on nanotechnology have more applications in BC treatment owing to their controlled and targeted drug release with lower toxicity and reduced adverse drug effects. Several nanocarriers, such as liposomes, nanoparticles, dendrimers, and micelles, have been used for the effective delivery of drugs. AREAS COVERED This article presents opportunities and challenges in BC treatment, the rationale for cancer immunotherapy, and several combinational approaches with their applications for BC treatment. EXPERT OPINION Nanotechnology can be used for the early prognosis and cure of BC. Several novel and targeted DDSs have been developed to enhance the efficacy of anticancer drugs. This article aims to understand new strategies for the treatment of BC and the appropriate design of nanocarriers used as a combinational DDS.
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Affiliation(s)
- Sarjana Raikwar
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Ankit Jain
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India
| | - Shivani Saraf
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Pooja Das Bidla
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Pritish Kumar Panda
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Ankita Tiwari
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Amit Verma
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
| | - Sanjay K Jain
- Department of Pharmaceutical Sciences, Pharmaceutics Research Projects Laboratory, Dr. Harisingh Gour Vishwavidyalaya, Sagar (M.P.), India
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Prados-Carvajal R, Irving E, Lukashchuk N, Forment JV. Preventing and Overcoming Resistance to PARP Inhibitors: A Focus on the Clinical Landscape. Cancers (Basel) 2021; 14:44. [PMID: 35008208 PMCID: PMC8750220 DOI: 10.3390/cancers14010044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 12/12/2022] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors (PARPi) are now a first-line maintenance treatment in ovarian cancer and have been approved in other cancer types, including breast, pancreatic and prostate. Despite their efficacy, and as is the case for other targeted therapies, resistance to PARPi has been reported clinically and is generating a growing patient population of unmet clinical need. Here, we discuss the mechanisms of resistance that have been described in pre-clinical models and focus on those that have been already identified in the clinic, highlighting the key challenges to fully characterise the clinical landscape of PARPi resistance and proposing ways of preventing and overcoming it.
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Affiliation(s)
- Rosario Prados-Carvajal
- DDR Biology, Bioscience, Oncology R&D, AstraZeneca, Cambridge CB4 0WG, UK; (R.P.-C.); (E.I.)
| | - Elsa Irving
- DDR Biology, Bioscience, Oncology R&D, AstraZeneca, Cambridge CB4 0WG, UK; (R.P.-C.); (E.I.)
| | - Natalia Lukashchuk
- Translational Medicine, Oncology R&D, AstraZeneca, Cambridge CB4 0WG, UK;
| | - Josep V. Forment
- DDR Biology, Bioscience, Oncology R&D, AstraZeneca, Cambridge CB4 0WG, UK; (R.P.-C.); (E.I.)
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14
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Park J, Lim MC, Lee JK, Jeong DH, Kim SI, Choi MC, Kim BG, Lee JY. A single-arm, phase II study of niraparib and bevacizumab maintenance therapy in platinum-sensitive, recurrent ovarian cancer patients previously treated with a PARP inhibitor: Korean Gynecologic Oncology Group (KGOG 3056)/NIRVANA-R trial. J Gynecol Oncol 2021; 33:e12. [PMID: 34910393 PMCID: PMC8899880 DOI: 10.3802/jgo.2022.33.e12] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/23/2021] [Accepted: 11/14/2021] [Indexed: 11/30/2022] Open
Abstract
Background Given the expanding clinical use of poly(adenosine diphosphate [ADP]-ribose) polymerase inhibitors (PARPis), there is a significant need for optimal strategies with which to treat patients whose cancer progresses while using a PARPi. However, the treatment consensus after PARPi has not been established. The aim of the Korean Gynecologic Oncology Group (KGOG) 3056/NIRVANA-R trial is to investigate the efficacy of niraparib in combination with bevacizumab as a maintenance therapy in platinum-sensitive ovarian cancer patients who were previously treated with a PARPi. Methods The KGOG 3056/NIRVANA-R is a multi-centre, investigator-initiated, single-arm, phase II trial of patients with platinum-sensitive recurrent ovarian cancer recruited from seven KGOG sites. This study included patients with platinum-sensitive recurrent epithelial ovarian cancer who received at least 2 previous courses of platinum-containing therapy and had been treated with a PARPi. Mucinous histology type was excluded. Patients who had responded to the last platinum regimen (either complete or partial response) were eligible to participate in this study. Forty-four patients will be recruited. All enrolled patients are treated with niraparib and bevacizumab for maintenance therapy until disease progression, unacceptable toxicity, or withdrawal of patient consent. The primary endpoint of the study is 6-month progression-free survival rate. Accrual is expected to be completed in 2022, followed by presentation of results in 2023. Trial Registration ClinicalTrials.gov Identifier: NCT04734665
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Affiliation(s)
- Junsik Park
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Myong Cheol Lim
- Division of Tumor Immunology, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.,Department of Cancer Control & Population Health, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.,Center for Gynecologic Cancer & Center for Clinical trials, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - Jae-Kwan Lee
- Department of Obstetrics and Gynecology, College of Medicine, Guro Hospital, Korea University, Seoul, Korea
| | - Dae Hoon Jeong
- Department of Obstetrics and Gynecology, Busan Paik Hospital, Inje University, Busan, Korea
| | - Se Ik Kim
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea
| | - Min Chul Choi
- Comprehensive Gynecologic Cancer Center, CHA Bundang Medical Center, Seongnam, Korea
| | - Byoung-Gie Kim
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jung-Yun Lee
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.
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15
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Understanding and overcoming resistance to PARP inhibitors in cancer therapy. Nat Rev Clin Oncol 2021; 18:773-791. [PMID: 34285417 DOI: 10.1038/s41571-021-00532-x] [Citation(s) in RCA: 213] [Impact Index Per Article: 71.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2021] [Indexed: 02/07/2023]
Abstract
Developing novel targeted anticancer therapies is a major goal of current research. The use of poly(ADP-ribose) polymerase (PARP) inhibitors in patients with homologous recombination-deficient tumours provides one of the best examples of a targeted therapy that has been successfully translated into the clinic. The success of this approach has so far led to the approval of four different PARP inhibitors for the treatment of several types of cancers and a total of seven different compounds are currently under clinical investigation for various indications. Clinical trials have demonstrated promising response rates among patients receiving PARP inhibitors, although the majority will inevitably develop resistance. Preclinical and clinical data have revealed multiple mechanisms of resistance and current efforts are focused on developing strategies to address this challenge. In this Review, we summarize the diverse processes underlying resistance to PARP inhibitors and discuss the potential strategies that might overcome these mechanisms such as combinations with chemotherapies, targeting the acquired vulnerabilities associated with resistance to PARP inhibitors or suppressing genomic instability.
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16
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Shah S, Rachmat R, Enyioma S, Ghose A, Revythis A, Boussios S. BRCA Mutations in Prostate Cancer: Assessment, Implications and Treatment Considerations. Int J Mol Sci 2021; 22:12628. [PMID: 34884434 PMCID: PMC8657599 DOI: 10.3390/ijms222312628] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/20/2021] [Accepted: 11/21/2021] [Indexed: 12/12/2022] Open
Abstract
Prostate cancer ranks fifth in cancer-related mortality in men worldwide. DNA damage is implicated in cancer and DNA damage response (DDR) pathways are in place against this to maintain genomic stability. Impaired DDR pathways play a role in prostate carcinogenesis and germline or somatic mutations in DDR genes have been found in both primary and metastatic prostate cancer. Among these, BRCA mutations have been found to be especially clinically relevant with a role for germline or somatic testing. Prostate cancer with DDR defects may be sensitive to poly(ADP-ribose) polymerase (PARP) inhibitors which target proteins in a process called PARylation. Initially they were used to target BRCA-mutated tumor cells in a process of synthetic lethality. However, recent studies have found potential for PARP inhibitors in a variety of other genetic settings. In this review, we explore the mechanisms of DNA repair, potential for genomic analysis of prostate cancer and therapeutics of PARP inhibitors along with their safety profile.
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Affiliation(s)
- Sidrah Shah
- Department of Palliative Care, Guy’s and St Thomas’ Hospital, Great Maze Pond, London SE1 9RT, UK;
| | - Rachelle Rachmat
- Department of Radiology, Guy’s and St Thomas’ Hospital, Great Maze Pond, London SE1 9RT, UK;
| | - Synthia Enyioma
- Department of Medical Oncology, Medway NHS Foundation Trust, Windmill Road, Gillingham ME7 5NY, UK; (S.E.); (A.R.)
| | - Aruni Ghose
- Department of Medical Oncology, Barts Cancer Centre, St. Bartholomew’s Hospital, Barts Health NHS Trust, W Smithfield, London EC1A 7BE, UK;
- Faculty of Life Sciences & Medicine, King’s College London, London WC2R 2LS, UK
| | - Antonios Revythis
- Department of Medical Oncology, Medway NHS Foundation Trust, Windmill Road, Gillingham ME7 5NY, UK; (S.E.); (A.R.)
| | - Stergios Boussios
- Department of Medical Oncology, Medway NHS Foundation Trust, Windmill Road, Gillingham ME7 5NY, UK; (S.E.); (A.R.)
- School of Cancer & Pharmaceutical Sciences, Faculty of Life Sciences & Medicine, King’s College London, London SE1 9RT, UK
- AELIA Organization, 9th Km Thessaloniki-Thermi, 57001 Thessaloniki, Greece
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17
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Abstract
ABSTRACT Despite representing only 5% of all annual cancer diagnoses in the United States, pancreatic cancer is projected to become the second leading cause of cancer-related death within the next 10 years. Progress in the treatment of advanced pancreatic cancer has been slow. Systemic therapies rely on combination cytotoxic agents, with limited options at progression. Recently, poly(ADP-ribose) polymerase inhibitors have demonstrated clinical activity in patients with advanced pancreatic cancer and pathogenic variants in BRCA1, BRCA2, and PALB2. In this review, we discuss the development of poly(ADP-ribose) polymerase inhibitors in pancreatic cancer, relevant clinical trials, and future directions.
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Affiliation(s)
- Timothy J Brown
- Abramson Cancer Center, The University of Pennsylvania, Philadelphia, PA 19121
| | - Kim A Reiss
- Abramson Cancer Center, The University of Pennsylvania, Philadelphia, PA 19121
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18
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Royfman R, Whiteley E, Noe O, Morand S, Creeden J, Stanbery L, Hamouda D, Nemunaitis J. BRCA1/2 signaling and homologous recombination deficiency in breast and ovarian cancer. Future Oncol 2021; 17:2817-2830. [PMID: 34058833 DOI: 10.2217/fon-2021-0072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Patients who have mutations of the genes BRCA1 or BRCA2 are at an increased risk for developing breast and ovarian cancer. BRCA1/2 function as tumor suppressor genes, responsible for regulating DNA repair, and play an essential role in homologous recombination. Mutation of BRCA1/2 results in homologous recombination deficiency and genomic instability which drives oncogenesis and cancer proliferation. Recently, BRCA1/2 gene expression has been implicated in regulating immune response. Here we discuss the signaling pathway of BRCA1/2 in relation to breast and ovarian cancer, with emphasis on how dysregulation facilitates the path to malignancy and current treatment options.
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Affiliation(s)
- Rachel Royfman
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - Emma Whiteley
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - Olivia Noe
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - Susan Morand
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - Justin Creeden
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - Laura Stanbery
- Gradalis, Inc., Carrollton, Department of Medical Affairs, Carrollton, TX 75006, USA
| | - Danae Hamouda
- University of Toledo Medical Center, Department of Internal Medicine, Toledo, OH 43614, USA
| | - John Nemunaitis
- Gradalis, Inc., Carrollton, Department of Medical Affairs, Carrollton, TX 75006, USA
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19
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Li L, Kumar AK, Hu Z, Guo Z. Small Molecule Inhibitors Targeting Key Proteins in the DNA Damage Response for Cancer Therapy. Curr Med Chem 2021; 28:963-985. [PMID: 32091326 DOI: 10.2174/0929867327666200224102309] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 01/17/2020] [Accepted: 01/29/2020] [Indexed: 11/22/2022]
Abstract
DNA damage response (DDR) is a complicated interactional pathway. Defects that occur in subordinate pathways of the DDR pathway can lead to genomic instability and cancer susceptibility. Abnormal expression of some proteins in DDR, especially in the DNA repair pathway, are associated with the subsistence and resistance of cancer cells. Therefore, the development of small molecule inhibitors targeting the chief proteins in the DDR pathway is an effective strategy for cancer therapy. In this review, we summarize the development of small molecule inhibitors targeting chief proteins in the DDR pathway, particularly focusing on their implications for cancer therapy. We present the action mode of DDR molecule inhibitors in preclinical studies and clinical cancer therapy, including monotherapy and combination therapy with chemotherapeutic drugs or checkpoint suppression therapy.
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Affiliation(s)
- Lulu Li
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, 1 WenYuan Road, Nanjing 210023, China
| | - Alagamuthu Karthick Kumar
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, 1 WenYuan Road, Nanjing 210023, China
| | - Zhigang Hu
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, 1 WenYuan Road, Nanjing 210023, China
| | - Zhigang Guo
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, 1 WenYuan Road, Nanjing 210023, China
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20
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Pleiotropic Roles of ABC Transporters in Breast Cancer. Int J Mol Sci 2021; 22:ijms22063199. [PMID: 33801148 PMCID: PMC8004140 DOI: 10.3390/ijms22063199] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/17/2021] [Accepted: 03/19/2021] [Indexed: 12/16/2022] Open
Abstract
Chemotherapeutics are the mainstay treatment for metastatic breast cancers. However, the chemotherapeutic failure caused by multidrug resistance (MDR) remains a pivotal obstacle to effective chemotherapies of breast cancer. Although in vitro evidence suggests that the overexpression of ATP-Binding Cassette (ABC) transporters confers resistance to cytotoxic and molecularly targeted chemotherapies by reducing the intracellular accumulation of active moieties, the clinical trials that target ABCB1 to reverse drug resistance have been disappointing. Nevertheless, studies indicate that ABC transporters may contribute to breast cancer development and metastasis independent of their efflux function. A broader and more clarified understanding of the functions and roles of ABC transporters in breast cancer biology will potentially contribute to stratifying patients for precision regimens and promote the development of novel therapies. Herein, we summarise the current knowledge relating to the mechanisms, functions and regulations of ABC transporters, with a focus on the roles of ABC transporters in breast cancer chemoresistance, progression and metastasis.
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21
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Miklikova S, Trnkova L, Plava J, Bohac M, Kuniakova M, Cihova M. The Role of BRCA1/2-Mutated Tumor Microenvironment in Breast Cancer. Cancers (Basel) 2021; 13:575. [PMID: 33540843 PMCID: PMC7867315 DOI: 10.3390/cancers13030575] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/23/2021] [Accepted: 01/29/2021] [Indexed: 12/15/2022] Open
Abstract
Taking into account the factors of high incidence rate, prevalence and mortality, breast cancer represents a crucial social and economic burden. Most cases of breast cancer develop as a consequence of somatic mutations accumulating in mammary epithelial cells throughout lifetime and approximately 5-10% can be ascribed to monogenic predispositions. Even though the role of genetic predispositions in breast cancer is well described in the context of genetics, very little is known about the role of the microenvironment carrying the same aberrant cells impaired by the germline mutation in the breast cancer development and progression. Based on the clinical observations, carcinomas carrying mutations in hereditary tumor-suppressor genes involved in maintaining genome integrity such as BRCA1/2 have worse prognosis and aggressive behavior. One of the mechanisms clarifying the aggressive nature of BRCA-associated tumors implies alterations within the surrounding adipose tissue itself. The objective of this review is to look at the role of BRCA1/2 mutations in the context of breast tumor microenvironment and plausible mechanisms by which it contributes to the aggressive behavior of the tumor cells.
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Affiliation(s)
- Svetlana Miklikova
- Cancer Research Institute, Biomedical Research Center, University Science Park for Biomedicine, Slovak Academy of Sciences, 84505 Bratislava, Slovakia; (S.M.); (L.T.); (J.P.)
| | - Lenka Trnkova
- Cancer Research Institute, Biomedical Research Center, University Science Park for Biomedicine, Slovak Academy of Sciences, 84505 Bratislava, Slovakia; (S.M.); (L.T.); (J.P.)
| | - Jana Plava
- Cancer Research Institute, Biomedical Research Center, University Science Park for Biomedicine, Slovak Academy of Sciences, 84505 Bratislava, Slovakia; (S.M.); (L.T.); (J.P.)
| | - Martin Bohac
- 2nd Department of Oncology, Faculty of Medicine, Comenius University, National Cancer Institute, Klenova 1, 83310 Bratislava, Slovakia;
- Department of Oncosurgery, National Cancer Institute, Klenova 1, 83310 Bratislava, Slovakia
- Regenmed Ltd., Medena 29, 81108 Bratislava, Slovakia
| | - Marcela Kuniakova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia;
| | - Marina Cihova
- Cancer Research Institute, Biomedical Research Center, University Science Park for Biomedicine, Slovak Academy of Sciences, 84505 Bratislava, Slovakia; (S.M.); (L.T.); (J.P.)
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22
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Kim DS, Camacho CV, Kraus WL. Alternate therapeutic pathways for PARP inhibitors and potential mechanisms of resistance. Exp Mol Med 2021; 53:42-51. [PMID: 33487630 PMCID: PMC8080675 DOI: 10.1038/s12276-021-00557-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/12/2020] [Indexed: 01/29/2023] Open
Abstract
Homologous recombination (HR) repair deficiency impairs the proper maintenance of genomic stability, thus rendering cancer cells vulnerable to loss or inhibition of DNA repair proteins, such as poly(ADP-ribose) polymerase-1 (PARP-1). Inhibitors of nuclear PARPs are effective therapeutics for a number of different types of cancers. Here we review key concepts and current progress on the therapeutic use of PARP inhibitors (PARPi). PARPi selectively induce synthetic lethality in cancer cells with homologous recombination deficiencies (HRDs), the most notable being cancer cells harboring mutations in the BRCA1 and BRCA2 genes. Recent clinical evidence, however, shows that PARPi can be effective as cancer therapeutics regardless of BRCA1/2 or HRD status, suggesting that a broader population of patients might benefit from PARPi therapy. Currently, four PARPi have been approved by the Food and Drug Administration (FDA) for the treatment of advanced ovarian and breast cancer with deleterious BRCA mutations. Although PARPi have been shown to improve progression-free survival, cancer cells inevitably develop resistance, which poses a significant obstacle to the prolonged use of PARP inhibitors. For example, somatic BRCA1/2 reversion mutations are often identified in patients with BRCA1/2-mutated cancers after treatment with platinum-based therapy, causing restoration of HR capacity and thus conferring PARPi resistance. Accordingly, PARPi have been studied in combination with other targeted therapies to overcome PARPi resistance, enhance PARPi efficacy, and sensitize tumors to PARP inhibition. Moreover, multiple clinical trials are now actively underway to evaluate novel combinations of PARPi with other anticancer therapies for the treatment of PARPi-resistant cancer. In this review, we highlight the mechanisms of action of PARP inhibitors with or without BRCA1/2 defects and provide an overview of the ongoing clinical trials of PARPi. We also review the current progress on PARPi-based combination strategies and PARP inhibitor resistance.
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Affiliation(s)
- Dae-Seok Kim
- grid.267313.20000 0000 9482 7121Laboratory of Signaling and Gene Regulation, Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA ,grid.267313.20000 0000 9482 7121Division of Basic Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA ,grid.267313.20000 0000 9482 7121Present Address: Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA
| | - Cristel V. Camacho
- grid.267313.20000 0000 9482 7121Laboratory of Signaling and Gene Regulation, Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA ,grid.267313.20000 0000 9482 7121Division of Basic Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA
| | - W. Lee Kraus
- grid.267313.20000 0000 9482 7121Laboratory of Signaling and Gene Regulation, Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA ,grid.267313.20000 0000 9482 7121Division of Basic Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390 USA
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23
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Grundy MK, Buckanovich RJ, Bernstein KA. Regulation and pharmacological targeting of RAD51 in cancer. NAR Cancer 2020; 2:zcaa024. [PMID: 33015624 PMCID: PMC7520849 DOI: 10.1093/narcan/zcaa024] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/25/2020] [Accepted: 09/03/2020] [Indexed: 01/06/2023] Open
Abstract
Regulation of homologous recombination (HR) is central for cancer prevention. However, too little HR can increase cancer incidence, whereas too much HR can drive cancer resistance to therapy. Importantly, therapeutics targeting HR deficiency have demonstrated a profound efficacy in the clinic improving patient outcomes, particularly for breast and ovarian cancer. RAD51 is central to DNA damage repair in the HR pathway. As such, understanding the function and regulation of RAD51 is essential for cancer biology. This review will focus on the role of RAD51 in cancer and beyond and how modulation of its function can be exploited as a cancer therapeutic.
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Affiliation(s)
- McKenzie K Grundy
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Ronald J Buckanovich
- Division of Hematology Oncology, Department of Internal Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Kara A Bernstein
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
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24
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Kovacsics D, Brózik A, Tihanyi B, Matula Z, Borsy A, Mészáros N, Szabó E, Németh E, Fóthi Á, Zámbó B, Szüts D, Várady G, Orbán TI, Apáti Á, Sarkadi B. Precision-engineered reporter cell lines reveal ABCG2 regulation in live lung cancer cells. Biochem Pharmacol 2020; 175:113865. [PMID: 32142727 DOI: 10.1016/j.bcp.2020.113865] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 02/18/2020] [Indexed: 12/19/2022]
Abstract
Expression of the ABCG2 multidrug transporter is a marker of cancer stem cells and a predictor of recurrent malignant disease. Understanding how human ABCG2 expression is modulated by pharmacotherapy is crucial in guiding therapeutic recommendations and may aid rational drug development. Genome edited reporter cells are useful in investigating gene regulation and visualizing protein activity in live cells but require precise targeting to preserve native regulatory regions. Here, we describe a fluorescent reporter assay that allows the noninvasive assessment of ABCG2 regulation in human lung adenocarcinoma cells. Using CRISPR-Cas9 gene editing coupled with homology-directed repair, we targeted an EGFP coding sequence to the translational start site of ABCG2, generating ABCG2 knock-out and in situ tagged ABCG2 reporter cells. Using the engineered cell lines, we show that ABCG2 is upregulated by a number of anti-cancer medications, HDAC inhibitors, hypoxia-mimicking agents and glucocorticoids, supporting a model in which ABCG2 is under the control of a general stress response. To our knowledge, this is the first description of a fluorescent reporter assay system designed to follow the endogenous regulation of a human ABC transporter in live cells. The information gained may guide therapy recommendations and aid rational drug design.
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Affiliation(s)
- Daniella Kovacsics
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Anna Brózik
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Borbála Tihanyi
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Zsolt Matula
- South-Pest Hospital Centre, National Institute of Hematology and Infectious Diseases, Laboratory of Molecular and Cytogenetics, Budapest, Hungary
| | - Adrienn Borsy
- South-Pest Hospital Centre, National Institute of Hematology and Infectious Diseases, Laboratory of Molecular and Cytogenetics, Budapest, Hungary
| | - Nikolett Mészáros
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Edit Szabó
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Eszter Németh
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Ábel Fóthi
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Boglárka Zámbó
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Dávid Szüts
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - György Várady
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Tamás I Orbán
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Ágota Apáti
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary
| | - Balázs Sarkadi
- Research Centre for Natural Sciences, Institute of Enzymology, Budapest, Hungary.
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25
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Morosi L, Matteo C, Ceruti T, Giordano S, Ponzo M, Frapolli R, Zucchetti M, Davoli E, D'Incalci M, Ubezio P. Quantitative determination of niraparib and olaparib tumor distribution by mass spectrometry imaging. Int J Biol Sci 2020; 16:1363-1375. [PMID: 32210725 PMCID: PMC7085221 DOI: 10.7150/ijbs.41395] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 01/18/2020] [Indexed: 12/15/2022] Open
Abstract
Rationale: Optimal intratumor distribution of an anticancer drug is fundamental to reach an active concentration in neoplastic cells, ensuring the therapeutic effect. Determination of drug concentration in tumor homogenates by LC-MS/MS gives important information about this issue but the spatial information gets lost. Targeted mass spectrometry imaging (MSI) has great potential to visualize drug distribution in the different areas of tumor sections, with good spatial resolution and superior specificity. MSI is rapidly evolving as a quantitative technique to measure the absolute drug concentration in each single pixel. Methods: Different inorganic nanoparticles were tested as matrices to visualize the PARP inhibitors (PARPi) niraparib and olaparib. Normalization by deuterated internal standard and a custom preprocessing pipeline were applied to achieve a reliable single pixel quantification of the two drugs in human ovarian tumors from treated mice. Results: A quantitative method to visualize niraparib and olaparib in tumor tissue of treated mice was set up and validated regarding precision, accuracy, linearity, repeatability and limit of detection. The different tumor penetration of the two drugs was visualized by MSI and confirmed by LC-MS/MS, indicating the homogeneous distribution and higher tumor exposure reached by niraparib compared to olaparib. On the other hand, niraparib distribution was heterogeneous in an ovarian tumor model overexpressing the multidrug resistance protein P-gp, a possible cause of resistance to PARPi. Conclusions: The current work highlights for the first time quantitative distribution of PAPRi in tumor tissue. The different tumor distribution of niraparib and olaparib could have important clinical implications. These data confirm the validity of MSI for spatial quantitative measurement of drug distribution providing fundamental information for pharmacokinetic studies, drug discovery and the study of resistance mechanisms.
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Affiliation(s)
- Lavinia Morosi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Cristina Matteo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Tommaso Ceruti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Silvia Giordano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Laboratory of Mass Spectrometry
| | - Marianna Ponzo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Roberta Frapolli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Massimo Zucchetti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Enrico Davoli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Laboratory of Mass Spectrometry
| | - Maurizio D'Incalci
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
| | - Paolo Ubezio
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology
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26
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Chakraborty G, Armenia J, Mazzu YZ, Nandakumar S, Stopsack KH, Atiq MO, Komura K, Jehane L, Hirani R, Chadalavada K, Yoshikawa Y, Khan NA, Chen Y, Abida W, Mucci LA, Lee GSM, Nanjangud GJ, Kantoff PW. Significance of BRCA2 and RB1 Co-loss in Aggressive Prostate Cancer Progression. Clin Cancer Res 2019; 26:2047-2064. [PMID: 31796516 DOI: 10.1158/1078-0432.ccr-19-1570] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 10/11/2019] [Accepted: 11/27/2019] [Indexed: 12/21/2022]
Abstract
PURPOSE Previous sequencing studies revealed that alterations of genes associated with DNA damage response (DDR) are enriched in men with metastatic castration-resistant prostate cancer (mCRPC). BRCA2, a DDR and cancer susceptibility gene, is frequently deleted (homozygous and heterozygous) in men with aggressive prostate cancer. Here we show that patients with prostate cancer who have lost a copy of BRCA2 frequently lose a copy of tumor suppressor gene RB1; importantly, for the first time, we demonstrate that co-loss of both genes in early prostate cancer is sufficient to induce a distinct biology that is likely associated with worse prognosis. EXPERIMENTAL DESIGN We prospectively investigated underlying molecular mechanisms and genomic consequences of co-loss of BRCA2 and RB1 in prostate cancer. We used CRISPR-Cas9 and RNAi-based methods to eliminate these two genes in prostate cancer cell lines and subjected them to in vitro studies and transcriptomic analyses. We developed a 3-color FISH assay to detect genomic deletions of BRCA2 and RB1 in prostate cancer cells and patient-derived mCRPC organoids. RESULTS In human prostate cancer cell lines (LNCaP and LAPC4), loss of BRCA2 leads to the castration-resistant phenotype. Co-loss of BRCA2-RB1 in human prostate cancer cells induces an epithelial-to-mesenchymal transition, which is associated with invasiveness and a more aggressive disease phenotype. Importantly, PARP inhibitors attenuate cell growth in human mCRPC-derived organoids and human CRPC cells harboring single-copy loss of both genes. CONCLUSIONS Our findings suggest that early identification of this aggressive form of prostate cancer offers potential for improved outcomes with early introduction of PARP inhibitor-based therapy.See related commentary by Mandigo and Knudsen, p. 1784.
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Affiliation(s)
- Goutam Chakraborty
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Joshua Armenia
- Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ying Z Mazzu
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Subhiksha Nandakumar
- Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Konrad H Stopsack
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Mohammad O Atiq
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Kazumasa Komura
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Department of Urology, Osaka Medical College, Osaka, Japan
| | - Lina Jehane
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Rahim Hirani
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Kalyani Chadalavada
- Molecular Cytogenetics Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Yuki Yoshikawa
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nabeela A Khan
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Yu Chen
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Human Oncology Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Wassim Abida
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lorelei A Mucci
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Gwo-Shu Mary Lee
- Department of Medicine, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Gouri J Nanjangud
- Molecular Cytogenetics Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Philip W Kantoff
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
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27
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Meghani K, Fuchs W, Detappe A, Drané P, Gogola E, Rottenberg S, Jonkers J, Matulonis U, Swisher EM, Konstantinopoulos PA, Chowdhury D. Multifaceted Impact of MicroRNA 493-5p on Genome-Stabilizing Pathways Induces Platinum and PARP Inhibitor Resistance in BRCA2-Mutated Carcinomas. Cell Rep 2019; 23:100-111. [PMID: 29617652 DOI: 10.1016/j.celrep.2018.03.038] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 02/05/2018] [Accepted: 03/10/2018] [Indexed: 10/17/2022] Open
Abstract
BRCA1/2-mutated ovarian cancers (OCs) are defective in homologous recombination repair (HRR) of double-strand breaks (DSBs) and thereby sensitive to platinum and PARP inhibitors (PARPis). Multiple PARPis have recently received US Food and Drug Administration (FDA) approval for treatment of OCs, and resistance to PARPis is a major clinical problem. Utilizing primary and recurrent BRCA1/2-mutated carcinomas from OC patients, patient-derived lines, and an in vivo BRCA2-mutated mouse model, we identified a microRNA, miR-493-5p, that induced platinum/PARPi resistance exclusively in BRCA2-mutated carcinomas. However, in contrast to the most prevalent resistance mechanisms in BRCA mutant carcinomas, miR-493-5p did not restore HRR. Expression of miR-493-5p in BRCA2-mutated/depleted cells reduced levels of nucleases and other factors involved in maintaining genomic stability. This resulted in relatively stable replication forks, diminished single-strand annealing of DSBs, and increased R-loop formation. We conclude that impact of miR-493-5p on multiple pathways pertinent to genome stability cumulatively causes PARPi/platinum resistance in BRCA2 mutant carcinomas.
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Affiliation(s)
- Khyati Meghani
- Department of Radiation Oncology, Division of Radiation and Genome Stability, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Walker Fuchs
- Department of Radiation Oncology, Division of Radiation and Genome Stability, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Alexandre Detappe
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Pascal Drané
- Department of Radiation Oncology, Division of Radiation and Genome Stability, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Ewa Gogola
- Division of Molecular Pathology and Cancer Genomics Netherlands, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Sven Rottenberg
- Division of Molecular Pathology and Cancer Genomics Netherlands, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands; Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Laenggassstr. 122, 3012 Bern, Switzerland
| | - Jos Jonkers
- Division of Molecular Pathology and Cancer Genomics Netherlands, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Ursula Matulonis
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Elizabeth M Swisher
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, USA
| | | | - Dipanjan Chowdhury
- Department of Radiation Oncology, Division of Radiation and Genome Stability, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
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28
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Noordermeer SM, van Attikum H. PARP Inhibitor Resistance: A Tug-of-War in BRCA-Mutated Cells. Trends Cell Biol 2019; 29:820-834. [PMID: 31421928 DOI: 10.1016/j.tcb.2019.07.008] [Citation(s) in RCA: 267] [Impact Index Per Article: 53.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 02/07/2023]
Abstract
Poly-(ADP)-ribose polymerase (PARP) inhibition is synthetic lethal with deficiency for homologous recombination (HR), a pathway essential for DNA double-strand break repair. PARP inhibitors (PARPi) therefore hold great promise for the treatment of tumors with disruptive mutations in BRCA1/2 or other HR factors. Unfortunately, PARPi resistance has proved to be a major problem in the clinic. Knowledge about PARPi resistance is expanding quickly, revealing four main mechanisms that alter drug availability, affect (de)PARylation enzymes, restore HR, or restore replication fork stability. We discuss how studies on resistance mechanisms have yielded important insights into the regulation of DNA double-strand break (DSB) repair and replication fork protection, and how these studies could pave the way for novel treatment options to target resistance mechanisms or acquired vulnerabilities.
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Affiliation(s)
- Sylvie M Noordermeer
- Leiden University Medical Center, Department of Human Genetics, Einthovenweg 20, 2333 ZC Leiden, The Netherlands; Oncode Institute, Jaarbeursplein 6, 3521 AL Utrecht, The Netherlands.
| | - Haico van Attikum
- Leiden University Medical Center, Department of Human Genetics, Einthovenweg 20, 2333 ZC Leiden, The Netherlands.
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29
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Ordonez LD, Hay T, McEwen R, Polanska UM, Hughes A, Delpuech O, Cadogan E, Powell S, Dry J, Tornillo G, Silcock L, Leo E, O’Connor MJ, Clarke AR, Smalley MJ. Rapid activation of epithelial-mesenchymal transition drives PARP inhibitor resistance in Brca2-mutant mammary tumours. Oncotarget 2019; 10:2586-2606. [PMID: 31080552 PMCID: PMC6498996 DOI: 10.18632/oncotarget.26830] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 03/23/2019] [Indexed: 01/06/2023] Open
Abstract
Tumours defective in the DNA homologous recombination repair pathway can be effectively treated with poly (ADP-ribose) polymerase (PARP) inhibitors; these have proven effective in clinical trials in patients with BRCA gene function-defective cancers. However, resistance observed in both pre-clinical and clinical studies is likely to impact on this treatment strategy. Over-expression of phosphoglycoprotein (P-gp) has been previously suggested as a mechanism of resistance to the PARP inhibitor olaparib in mouse models of Brca1/2-mutant breast cancer. Here, we report that in a Brca2 model treated with olaparib, P-gp upregulation is observed but is not sufficient to confer resistance. Furthermore, resistant/relapsed tumours do not show substantial changes in PK/PD of olaparib, do not downregulate PARP1 or re-establish double stranded DNA break repair by homologous recombination, all previously suggested as mechanisms of resistance. However, resistance is strongly associated with epithelial-mesenchymal transition (EMT) and treatment-naïve tumours given a single dose of olaparib upregulate EMT markers within one hour. Therefore, in this model, olaparib resistance is likely a product of an as-yet unidentified mechanism associated with rapid transition to the mesenchymal phenotype.
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Affiliation(s)
- Liliana D. Ordonez
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
| | - Trevor Hay
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
| | - Robert McEwen
- Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | | | - Adina Hughes
- Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | - Oona Delpuech
- Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | | | - Steve Powell
- Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | - Jonathan Dry
- Oncology, IMED Biotech Unit, AstraZeneca, Waltham, MA, USA
| | - Giusy Tornillo
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
| | - Lucy Silcock
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
| | | | | | - Alan R. Clarke
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
- Posthumous authorship
| | - Matthew J. Smalley
- European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, UK
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30
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de Gooijer MC, Buil LCM, Çitirikkaya CH, Hermans J, Beijnen JH, van Tellingen O. ABCB1 Attenuates the Brain Penetration of the PARP Inhibitor AZD2461. Mol Pharm 2018; 15:5236-5243. [PMID: 30252484 DOI: 10.1021/acs.molpharmaceut.8b00742] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Poly (ADP-ribose) polymerase (PARP) inhibitors are a relatively new class of anticancer agents that have attracted attention for treatment of glioblastoma because of their ability to potentiate temozolomide chemotherapy. Previous studies have demonstrated that sufficient brain penetration is a prerequisite for efficacy of PARP inhibitors in glioma mouse models. Unfortunately, however, most of the PARP inhibitors developed to date have a limited brain penetration due to the presence of P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP) at the blood-brain barrier. AZD2461 is a novel PARP inhibitor that is unaffected by P-gp mediated resistance in breast cancer models and thus appears to have promising characteristics for brain penetration. We here use a comprehensive set of in vitro and in vivo models to study the brain penetration and oral bioavailability of AZD2461. We report that AZD2461 has a good membrane permeability. However, it is a substrate of P-gp and BCRP, and P-gp in particular limits its brain penetration in vivo. We show that AZD2461 has a low oral bioavailability, although it is not affected by P-gp and BCRP. Together, these findings are not in favor of further development of AZD2461 for treatment of glioblastoma.
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Affiliation(s)
| | | | | | | | - Jos H Beijnen
- Department of Pharmacy and Pharmacology , The Netherlands Cancer Institute/MC Slotervaart Hospital , Louwesweg 6 , 1066 EC Amsterdam , The Netherlands.,Division of Pharmacoepidemiology and Clinical Pharmacology, Department of Pharmaceutical Sciences, Faculty of Science , Utrecht University , Universiteitsweg 99 , 3584 CG Utrecht , The Netherlands
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31
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Robey RW, Pluchino KM, Hall MD, Fojo AT, Bates SE, Gottesman MM. Revisiting the role of ABC transporters in multidrug-resistant cancer. Nat Rev Cancer 2018; 18:452-464. [PMID: 29643473 PMCID: PMC6622180 DOI: 10.1038/s41568-018-0005-8] [Citation(s) in RCA: 1108] [Impact Index Per Article: 184.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Most patients who die of cancer have disseminated disease that has become resistant to multiple therapeutic modalities. Ample evidence suggests that the expression of ATP-binding cassette (ABC) transporters, especially the multidrug resistance protein 1 (MDR1, also known as P-glycoprotein or P-gp), which is encoded by ABC subfamily B member 1 (ABCB1), can confer resistance to cytotoxic and targeted chemotherapy. However, the development of MDR1 as a therapeutic target has been unsuccessful. At the time of its discovery, appropriate tools for the characterization and clinical development of MDR1 as a therapeutic target were lacking. Thirty years after the initial cloning and characterization of MDR1 and the implication of two additional ABC transporters, the multidrug resistance-associated protein 1 (MRP1; encoded by ABCC1)), and ABCG2, in multidrug resistance, interest in investigating these transporters as therapeutic targets has waned. However, with the emergence of new data and advanced techniques, we propose to re-evaluate whether these transporters play a clinical role in multidrug resistance. With this Opinion article, we present recent evidence indicating that it is time to revisit the investigation into the role of ABC transporters in efficient drug delivery in various cancer types and at the blood-brain barrier.
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Affiliation(s)
- Robert W Robey
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Kristen M Pluchino
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Matthew D Hall
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD, USA
| | - Antonio T Fojo
- Division of Hematology/Oncology, Department of Medicine, Columbia University/New York Presbyterian Hospital, Manhattan, NY, USA
- James J. Peters VA Medical Center, Bronx, NY, USA
| | - Susan E Bates
- Division of Hematology/Oncology, Department of Medicine, Columbia University/New York Presbyterian Hospital, Manhattan, NY, USA
- James J. Peters VA Medical Center, Bronx, NY, USA
| | - Michael M Gottesman
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
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32
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Sunada S, Nakanishi A, Miki Y. Crosstalk of DNA double-strand break repair pathways in poly(ADP-ribose) polymerase inhibitor treatment of breast cancer susceptibility gene 1/2-mutated cancer. Cancer Sci 2018; 109:893-899. [PMID: 29427345 PMCID: PMC5891174 DOI: 10.1111/cas.13530] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 01/26/2018] [Accepted: 01/30/2018] [Indexed: 12/30/2022] Open
Abstract
Germline mutations in breast cancer susceptibility gene 1 or 2 (BRCA1 or BRCA2) significantly increase cancer risk in hereditary breast and ovarian cancer syndrome (HBOC). Both genes function in the homologous recombination (HR) pathway of the DNA double‐strand break (DSB) repair process. Therefore, the DNA‐repair defect characteristic of cancer cells brings about a therapeutic advantage for poly(ADP‐ribose) polymerase (PARP) inhibitor‐induced synthetic lethality. PARP inhibitor‐based therapeutics initially cause cancer lethality but acquired resistance mechanisms have been found and need to be elucidated. In particular, it is essential to understand in detail the mechanism of DNA damage and repair to PARP inhibitor treatment. Further investigations have shown the roles of BRCA1/2 and its associations to other molecules in the DSB repair system. Notably, the repair pathway chosen in BRCA1‐deficient cells could be entirely different from that in BRCA2‐deficient cells after PARP inhibitor treatment. The present review describes synthetic lethality and acquired resistance mechanisms to PARP inhibitor through the DSB repair pathway and subsequent repair process. In addition, recent knowledge of resistance mechanisms is discussed. Our model should contribute to the development of novel therapeutic strategies.
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Affiliation(s)
- Shigeaki Sunada
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Nakanishi
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshio Miki
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
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33
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BRCA-deficient mouse mammary tumor organoids to study cancer-drug resistance. Nat Methods 2017; 15:134-140. [PMID: 29256493 DOI: 10.1038/nmeth.4535] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 10/17/2017] [Indexed: 02/07/2023]
Abstract
Poly(ADP-ribose) polymerase inhibition (PARPi) is a promising new therapeutic approach for the treatment of cancers that show homologous recombination deficiency (HRD). Despite the success of PARPi in targeting HRD in tumors that lack the tumor suppressor function of BRCA1 or BRCA2, drug resistance poses a major obstacle. We developed three-dimensional cancer organoids derived from genetically engineered mouse models (GEMMs) for BRCA1- and BRCA2-deficient cancers. Unlike conventional cell lines or mammospheres, organoid cultures can be efficiently derived and rapidly expanded in vitro. Orthotopically transplanted organoids give rise to mammary tumors that recapitulate the epithelial morphology and preserve the drug response of the original tumor. Notably, GEMM-tumor-derived organoids can be easily genetically modified, making them a powerful tool for genetic studies of tumor biology and drug resistance.
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34
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Guo P, Pu T, Chen S, Qiu Y, Zhong X, Zheng H, Chen L, Bu H, Ye F. Breast cancers with EGFR and HER2 co-amplification favor distant metastasis and poor clinical outcome. Oncol Lett 2017; 14:6562-6570. [PMID: 29181099 PMCID: PMC5696709 DOI: 10.3892/ol.2017.7051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 02/28/2017] [Indexed: 02/05/2023] Open
Abstract
ErbB signaling serves essential roles in invasive ductal carcinoma (IDC). The aim of the present study was to assess gene amplification in ErbB family members in IDC with clinical implications. Quantitative polymerase chain reaction and fluorescence in situ hybridization were performed on formalin-fixed paraffin-embedded tumor samples for gene amplification detection. The clinical and histopathological characteristics, as well as the prognostic significance, were analyzed. Among the 119 IDC patients evaluated, epidermal growth factor receptor [EGFR; also known as human epidermal growth factor receptor (HER)1], HER2, HER3 and HER4 gene amplification was observed in 30 (25.2%), 44 (36.9%), 0 (0.0%) and 1 (0.8%) patients, respectively. EGFR amplification was associated with estrogen receptor status (P=0.028) and higher possibilities of recurrence (P=0.015) and distant metastasis (following initial surgery) (P=0.011). In survival analysis, EGFR amplification was also associated with disease-free survival (DFS) (P=0.001) and overall survival (OS) (P=0.003). HER2 amplification was associated with larger tumor size (P=0.006), later clinical stage (P=0.003) and distant metastasis (following initial surgery) (P=0.006). In survival analysis, HER2 amplification was also associated with DFS (P=0.011). Notably, the present study identified a group of patients in whom EGFR and HER2 were co-amplified. This group of patients appeared to have a higher possibility of metastasis (when diagnosed) (P=0.014) and distant metastasis (following initial surgery) (P<0.001). In survival analysis, these patients were noticed to be associated with DFS (P<0.001) and OS (P=0.002). With respect to treatment regimen, this was also true for the DFS association with chemotherapy (P<0.001), radiotherapy (P<0.001) and hormonal therapy (P=0.001). The present results suggest that EGFR and HER2 amplification favor distant metastasis following initial surgery and are significantly associated with poor clinical outcome in breast cancer patients.
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Affiliation(s)
- Peng Guo
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Tianjie Pu
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Department of Pathology, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Shinan Chen
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yan Qiu
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Department of Pathology, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaorong Zhong
- Cancer Center, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Laboratory of Molecular Diagnosis of Cancer, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Hong Zheng
- Cancer Center, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Laboratory of Molecular Diagnosis of Cancer, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Lina Chen
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Hong Bu
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Department of Pathology, State Key Laboratory of Biotherapy, National Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Feng Ye
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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35
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Abstract
Mutations in BRCA1 or BRCA2 define a subset of prostate cancer patients. Herein, we address the question whether BRCA1/2 mutations have a predictive impact on chemotherapy with docetaxel, a widely used drug in patients with metastatic castration resistant prostate cancer (mCRPC). Fifty-three men treated with docetaxel for mCRPC were tested for somatic BRCA1/2 mutations of the primary tumor. In a subgroup of patients, BRCA1/2 protein expression was tested as a potential surrogate marker for BRCA1/2 inactivation. Eight of 53 patients (15.1%) harbored a deleterious BRCA2 mutation. No BRCA1 mutation was found. Patients with a BRCA2 mutation showed a response rate of 25% to docetaxel in comparison to 71.1% in men with wildtype BRCA2 (p = 0.019). While the time to develop castration resistance was similar in both subgroups, the overall survival was significantly shorter in patients harboring a BRCA2 mutation. No correlation between the BRCA1/2 protein expression and the response to docetaxel was found. While the presence of a BRCA2 mutation does not preclude a response to docetaxel, there is overall a significant correlation between BRCA2 inactivation and a poor response rate. Our results suggest that a close oncological monitoring of patients with BRCA2 mutations for taxane resistance is warranted.
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36
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Dhillon KK, Bajrami I, Taniguchi T, Lord CJ. Synthetic lethality: the road to novel therapies for breast cancer. Endocr Relat Cancer 2016; 23:T39-55. [PMID: 27528623 DOI: 10.1530/erc-16-0228] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 08/15/2016] [Indexed: 12/12/2022]
Abstract
When the BRCA1 and BRCA2 tumour suppressor genes were identified in the early 1990s, the immediate implications of mapping, cloning and delineating the sequence of these genes were that individuals in families with a BRCA gene mutation could be tested for the presence of a mutation and their risk of developing cancer could be predicted. Over time though, the discovery of BRCA1 and BRCA2 has had a much greater influence than many might have imagined. In this review, we discuss how the discovery of BRCA1 and BRCA2 has not only provided an understanding of the molecular processes that drive tumourigenesis but also reignited an interest in therapeutically exploiting loss-of-function alterations in tumour suppressor genes.
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Affiliation(s)
| | - Ilirjana Bajrami
- The CRUK Gene Function Laboratory and Breast Cancer Now Toby Robins Research CentreThe Institute of Cancer Research, London, UK
| | | | - Christopher J Lord
- The CRUK Gene Function Laboratory and Breast Cancer Now Toby Robins Research CentreThe Institute of Cancer Research, London, UK
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Vaidyanathan A, Sawers L, Gannon AL, Chakravarty P, Scott AL, Bray SE, Ferguson MJ, Smith G. ABCB1 (MDR1) induction defines a common resistance mechanism in paclitaxel- and olaparib-resistant ovarian cancer cells. Br J Cancer 2016; 115:431-41. [PMID: 27415012 PMCID: PMC4985349 DOI: 10.1038/bjc.2016.203] [Citation(s) in RCA: 224] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/26/2016] [Accepted: 06/02/2016] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Clinical response to chemotherapy for ovarian cancer is frequently compromised by the development of drug-resistant disease. The underlying molecular mechanisms and implications for prescription of routinely prescribed chemotherapy drugs are poorly understood. METHODS We created novel A2780-derived ovarian cancer cell lines resistant to paclitaxel and olaparib following continuous incremental drug selection. MTT assays were used to assess chemosensitivity to paclitaxel and olaparib in drug-sensitive and drug-resistant cells±the ABCB1 inhibitors verapamil and elacridar and cross-resistance to cisplatin, carboplatin, doxorubicin, rucaparib, veliparib and AZD2461. ABCB1 expression was assessed by qRT-PCR, copy number, western blotting and immunohistochemical analysis and ABCB1 activity assessed by the Vybrant and P-glycoprotein-Glo assays. RESULTS Paclitaxel-resistant cells were cross-resistant to olaparib, doxorubicin and rucaparib but not to veliparib or AZD2461. Resistance correlated with increased ABCB1 expression and was reversible following treatment with the ABCB1 inhibitors verapamil and elacridar. Active efflux of paclitaxel, olaparib, doxorubicin and rucaparib was confirmed in drug-resistant cells and in ABCB1-expressing bacterial membranes. CONCLUSIONS We describe a common ABCB1-mediated mechanism of paclitaxel and olaparib resistance in ovarian cancer cells. Optimal choice of PARP inhibitor may therefore limit the progression of drug-resistant disease, while routine prescription of first-line paclitaxel may significantly limit subsequent chemotherapy options in ovarian cancer patients.
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Affiliation(s)
- Aparajitha Vaidyanathan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Lynne Sawers
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Anne-Louise Gannon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Probir Chakravarty
- Bioinformatics and Biostatistics Service, Cancer Research UK, 44 Lincolns Inn Fields, London WC2A 3PX, UK
| | - Alison L Scott
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Susan E Bray
- Tayside Tissue Bank, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | | | - Gillian Smith
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
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Vaidyanathan A, Sawers L, Gannon AL, Chakravarty P, Scott AL, Bray SE, Ferguson MJ, Smith G. ABCB1 (MDR1) induction defines a common resistance mechanism in paclitaxel- and olaparib-resistant ovarian cancer cells. Br J Cancer 2016. [PMID: 27415012 DOI: 10.1038/bjc.2016.203] [] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Clinical response to chemotherapy for ovarian cancer is frequently compromised by the development of drug-resistant disease. The underlying molecular mechanisms and implications for prescription of routinely prescribed chemotherapy drugs are poorly understood. METHODS We created novel A2780-derived ovarian cancer cell lines resistant to paclitaxel and olaparib following continuous incremental drug selection. MTT assays were used to assess chemosensitivity to paclitaxel and olaparib in drug-sensitive and drug-resistant cells±the ABCB1 inhibitors verapamil and elacridar and cross-resistance to cisplatin, carboplatin, doxorubicin, rucaparib, veliparib and AZD2461. ABCB1 expression was assessed by qRT-PCR, copy number, western blotting and immunohistochemical analysis and ABCB1 activity assessed by the Vybrant and P-glycoprotein-Glo assays. RESULTS Paclitaxel-resistant cells were cross-resistant to olaparib, doxorubicin and rucaparib but not to veliparib or AZD2461. Resistance correlated with increased ABCB1 expression and was reversible following treatment with the ABCB1 inhibitors verapamil and elacridar. Active efflux of paclitaxel, olaparib, doxorubicin and rucaparib was confirmed in drug-resistant cells and in ABCB1-expressing bacterial membranes. CONCLUSIONS We describe a common ABCB1-mediated mechanism of paclitaxel and olaparib resistance in ovarian cancer cells. Optimal choice of PARP inhibitor may therefore limit the progression of drug-resistant disease, while routine prescription of first-line paclitaxel may significantly limit subsequent chemotherapy options in ovarian cancer patients.
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Affiliation(s)
- Aparajitha Vaidyanathan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Lynne Sawers
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Anne-Louise Gannon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Probir Chakravarty
- Bioinformatics and Biostatistics Service, Cancer Research UK, 44 Lincolns Inn Fields, London WC2A 3PX, UK
| | - Alison L Scott
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Susan E Bray
- Tayside Tissue Bank, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | | | - Gillian Smith
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
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Wang YQ, Wang PY, Wang YT, Yang GF, Zhang A, Miao ZH. An Update on Poly(ADP-ribose)polymerase-1 (PARP-1) Inhibitors: Opportunities and Challenges in Cancer Therapy. J Med Chem 2016; 59:9575-9598. [PMID: 27416328 DOI: 10.1021/acs.jmedchem.6b00055] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Poly(ADP-ribose)polymerase-1 (PARP-1) is a critical DNA repair enzyme in the base excision repair pathway. Inhibitors of this enzyme comprise a new type of anticancer drug that selectively kills cancer cells by targeting homologous recombination repair defects. Since 2010, important advances have been achieved in PARP-1 inhibitors. Specifically, the approval of olaparib in 2014 for the treatment of ovarian cancer with BRCA mutations validated PARP-1 as an anticancer target and established its clinical importance in cancer therapy. Here, we provide an update on PARP-1 inhibitors, focusing on breakthroughs in their clinical applications and investigations into relevant mechanisms of action, biomarkers, and drug resistance. We also provide an update on the design strategies and the structural types of PARP-1 inhibitors. Opportunities and challenges in PARP-1 inhibitors for cancer therapy will be discussed based on the above advances.
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Affiliation(s)
- Ying-Qing Wang
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, China
| | - Ping-Yuan Wang
- CAS Key Laboratory of Receptor Research, and Synthetic Organic & Medicinal Chemistry Laboratory, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Lu, Building 3, Room 426, Pudong, Shanghai 201203, China.,Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, China
| | - Yu-Ting Wang
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, China
| | - Ao Zhang
- CAS Key Laboratory of Receptor Research, and Synthetic Organic & Medicinal Chemistry Laboratory, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Lu, Building 3, Room 426, Pudong, Shanghai 201203, China
| | - Ze-Hong Miao
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, China
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CD66 and CD49f expressing cells are associated with distinct neoplastic phenotypes and progression in human cervical cancer. Eur J Cancer 2016; 60:166-78. [PMID: 27132080 DOI: 10.1016/j.ejca.2016.03.072] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 03/16/2016] [Accepted: 03/17/2016] [Indexed: 12/31/2022]
Abstract
BACKGROUND In this study, building on our recent work identifying a subset of CD66+ve cells with distinctive tumourigenic properties in human cervical cancers, we examine patterns of expression and function of these cells; to generate insights into the process of metastasis. METHODS Our broad approach in this study has been to compare the expression and function of two subsets marked by CD66 and CD49f. We use a combination of histopathology, immunostaining and flow cytometry, functional analysis of an established cervical cancer cell line and a retrospective analysis of a cohort of cervical cancer. RESULTS We noted CD66 expression associated with clusters of cells which are spindle shaped, SMA+ve, podoplanin+ve, phalloidin high, fibronectin high, plakoglobin low, ki67-ve and CK10+ve at the migratory phase along with features of partial EMT. Further, TGFβ1 a well known regulator of EMT, positively correlated with CD66 expression. The additional CD49f+ve subset at the leading invading front of migration was SMA-ve, phalloidin low, fibronectin low, plakoglobin high, Ki67+ve and CK14+ve. These data are consistent with a role for CD66 cells in metastatic invasion with a collective cell migration process co-opting the CD49f subset. Our retrospective analysis of a cohort is consistent with a role for CD66 in metastasis. However, the broad analysis of CD66, CD49f and TGFβ1 expression with patterns of overall survival points to a possible protective effect particularly for local recurrences. Hence, future studies focussing on potential heterogeneity within the CD66 subset along with the possible role of isoforms and intra-cellular roles would be essential.
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Selective resistance to the PARP inhibitor olaparib in a mouse model for BRCA1-deficient metaplastic breast cancer. Proc Natl Acad Sci U S A 2015; 112:8409-14. [PMID: 26100884 DOI: 10.1073/pnas.1500223112] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Metaplastic breast carcinoma (MBC) is a rare histological breast cancer subtype characterized by mesenchymal elements and poor clinical outcome. A large fraction of MBCs harbor defects in breast cancer 1 (BRCA1). As BRCA1 deficiency sensitizes tumors to DNA cross-linking agents and poly(ADP-ribose) polymerase (PARP) inhibitors, we sought to investigate the response of BRCA1-deficient MBCs to the PARP inhibitor olaparib. To this end, we established a genetically engineered mouse model (GEMM) for BRCA1-deficient MBC by introducing the MET proto-oncogene into a BRCA1-associated breast cancer model, using our novel female GEMM ES cell (ESC) pipeline. In contrast to carcinomas, BRCA1-deficient mouse carcinosarcomas resembling MBC show intrinsic resistance to olaparib caused by increased P-glycoprotein (Pgp) drug efflux transporter expression. Indeed, resistance could be circumvented by using another PARP inhibitor, AZD2461, which is a poor Pgp substrate. These preclinical findings suggest that patients with BRCA1-associated MBC may show poor response to olaparib and illustrate the value of GEMM-ESC models of human cancer for evaluation of novel therapeutics.
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