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Yu Z, Coorens THH, Uddin MM, Ardlie KG, Lennon N, Natarajan P. Genetic variation across and within individuals. Nat Rev Genet 2024; 25:548-562. [PMID: 38548833 DOI: 10.1038/s41576-024-00709-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2024] [Indexed: 04/12/2024]
Abstract
Germline variation and somatic mutation are intricately connected and together shape human traits and disease risks. Germline variants are present from conception, but they vary between individuals and accumulate over generations. By contrast, somatic mutations accumulate throughout life in a mosaic manner within an individual due to intrinsic and extrinsic sources of mutations and selection pressures acting on cells. Recent advancements, such as improved detection methods and increased resources for association studies, have drastically expanded our ability to investigate germline and somatic genetic variation and compare underlying mutational processes. A better understanding of the similarities and differences in the types, rates and patterns of germline and somatic variants, as well as their interplay, will help elucidate the mechanisms underlying their distinct yet interlinked roles in human health and biology.
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Affiliation(s)
- Zhi Yu
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | | | - Md Mesbah Uddin
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | | | - Niall Lennon
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Pradeep Natarajan
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Cardiovascular Research Center and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA.
- Department of Medicine, Harvard Medical School, Boston, MA, USA.
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Nunes M, Bartosch C, Abreu MH, Richardson A, Almeida R, Ricardo S. Deciphering the Molecular Mechanisms behind Drug Resistance in Ovarian Cancer to Unlock Efficient Treatment Options. Cells 2024; 13:786. [PMID: 38727322 PMCID: PMC11083313 DOI: 10.3390/cells13090786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 05/01/2024] [Indexed: 05/13/2024] Open
Abstract
Ovarian cancer is a highly lethal form of gynecological cancer. This disease often goes undetected until advanced stages, resulting in high morbidity and mortality rates. Unfortunately, many patients experience relapse and succumb to the disease due to the emergence of drug resistance that significantly limits the effectiveness of currently available oncological treatments. Here, we discuss the molecular mechanisms responsible for resistance to carboplatin, paclitaxel, polyadenosine diphosphate ribose polymerase inhibitors, and bevacizumab in ovarian cancer. We present a detailed analysis of the most extensively investigated resistance mechanisms, including drug inactivation, drug target alterations, enhanced drug efflux pumps, increased DNA damage repair capacity, and reduced drug absorption/accumulation. The in-depth understanding of the molecular mechanisms associated with drug resistance is crucial to unveil new biomarkers capable of predicting and monitoring the kinetics during disease progression and discovering new therapeutic targets.
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Affiliation(s)
- Mariana Nunes
- Differentiation and Cancer Group, Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal; (M.N.); (R.A.)
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal
| | - Carla Bartosch
- Porto Comprehensive Cancer Center Raquel Seruca (PCCC), Portuguese Oncology Institute of Porto (IPO-Porto), 4200-072 Porto, Portugal; (C.B.); (M.H.A.)
- Department of Pathology, Portuguese Oncology Institute of Porto (IPO-Porto), 4200-072 Porto, Portugal
- Cancer Biology & Epigenetics Group, Research Center of Portuguese Oncology Institute of Porto (CI-IPO-Porto), Health Research Network (RISE@CI-IPO-Porto), Portuguese Oncology Institute of Porto (IPO-Porto), 4200-072 Porto, Portugal
| | - Miguel Henriques Abreu
- Porto Comprehensive Cancer Center Raquel Seruca (PCCC), Portuguese Oncology Institute of Porto (IPO-Porto), 4200-072 Porto, Portugal; (C.B.); (M.H.A.)
- Department of Medical Oncology, Portuguese Oncology Institute of Porto (IPO-Porto), 4200-072 Porto, Portugal
| | - Alan Richardson
- The School of Pharmacy and Bioengineering, Guy Hilton Research Centre, Keele University, Thornburrow Drive, Stoke-on-Trent ST4 7QB, Staffordshire, UK;
| | - Raquel Almeida
- Differentiation and Cancer Group, Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal; (M.N.); (R.A.)
- Biology Department, Faculty of Sciences, University of Porto (FCUP), 4169-007 Porto, Portugal
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, University Institute of Health Sciences—CESPU, 4585-116 Gandra, Portugal
| | - Sara Ricardo
- Differentiation and Cancer Group, Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal; (M.N.); (R.A.)
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, University Institute of Health Sciences—CESPU, 4585-116 Gandra, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, Toxicologic Pathology Research Laboratory, University Institute of Health Sciences (1H-TOXRUN, IUCS-CESPU), 4585-116 Gandra, Portugal
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Yu A, Hazra A, Jiao JJ, Hellemans P, Mitselos A, Tian H, Ruixo JJP, Haddish-Berhane N, Ouellet D, Russu A. Demonstrating Bioequivalence for Two Dose Strengths of Niraparib and Abiraterone Acetate Dual-Action Tablets Versus Single Agents: Utility of Clinical Study Data Supplemented with Modeling and Simulation. Clin Pharmacokinet 2024; 63:511-527. [PMID: 38436924 PMCID: PMC11052869 DOI: 10.1007/s40262-023-01340-5] [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] [Accepted: 12/14/2023] [Indexed: 03/05/2024]
Abstract
BACKGROUND AND OBJECTIVE The combination of niraparib and abiraterone acetate (AA) plus prednisone is under investigation for the treatment of patients with metastatic castration-resistant prostate cancer (mCRPC) and metastatic castration-sensitive prostate cancer (mCSPC). Regular-strength (RS) and lower-strength (LS) dual-action tablets (DATs), comprising niraparib 100 mg/AA 500 mg and niraparib 50 mg/AA 500 mg, respectively, were developed to reduce pill burden and improve patient experience. A bioequivalence (BE)/bioavailability (BA) study was conducted under modified fasting conditions in patients with mCRPC to support approval of the DATs. METHODS This open-label randomized BA/BE study (NCT04577833) was conducted at 14 sites in the USA and Europe. The study had a sequential design, including a 21-day screening phase, a pharmacokinetic (PK) assessment phase comprising three periods [namely (1) single-dose with up to 1-week run-in, (2) daily dose on days 1-11, and (3) daily dose on days 12-22], an extension where both niraparib and AA as single-agent combination (SAC; reference) or AA alone was continued from day 23 until discontinuation, and a 30-day follow-up phase. Patients were randomly assigned in a parallel-group design (four-sequence randomization) to receive a single oral dose of niraparib 100 mg/AA 1000 mg as a LS-DAT or SAC in period 1, and patients continued as randomized into a two-way crossover design during periods 2 and 3 where they received niraparib 200 mg/AA 1000 mg once daily as a RS-DAT or SAC. The design was powered on the basis of crossover assessment of RS-DAT versus SAC. During repeated dosing (periods 2 and 3, and extension phase), all patients also received prednisone/prednisolone 5 mg twice daily. Plasma samples were collected for measurement of niraparib and abiraterone plasma concentrations. Statistical assessment of the RS-DAT and LS-DAT versus SAC was performed on log-transformed pharmacokinetic parameters data from periods 2 and 3 (crossover) and from period 1 (parallel), respectively. Additional paired analyses and model-based bioequivalence assessments were conducted to evaluate the similarity between the LS-DAT and SAC. RESULTS For the RS-DAT versus SAC, the 90% confidence intervals (CI) of geometric mean ratios (GMR) for maximum concentration at a steady state (Cmax,ss) and area under the plasma concentration-time curve from 0-24 h at a steady state (AUC 0-24h,ss) were respectively 99.18-106.12% and 97.91-104.31% for niraparib and 87.59-106.69 and 86.91-100.23% for abiraterone. For the LS-DAT vs SAC, the 90% CI of GMR for AUC0-72h of niraparib was 80.31-101.12% in primary analysis, the 90% CI of GMR for Cmax,ss and AUC 0-24h,ss of abiraterone was 85.41-118.34% and 86.51-121.64% respectively, and 96.4% of simulated LS-DAT versus SAC BE trials met the BE criteria for both niraparib and abiraterone. CONCLUSIONS The RS-DAT met BE criteria (range 80%-125%) versus SAC based on 90% CI of GMR for Cmax,ss and AUC 0-24h,ss. The LS-DAT was considered BE to SAC on the basis of the niraparib component meeting the BE criteria in the primary analysis for AUC 0-72h; abiraterone meeting the BE criteria in additional paired analyses based on Cmax,ss and AUC 0-24h,ss; and the percentage of simulated LS-DAT versus SAC BE trials meeting the BE criteria for both. CLINICALTRIALS GOV IDENTIFIER NCT04577833.
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Affiliation(s)
- Alex Yu
- Janssen Research and Development, LLC, 1400 McKean Rd, Springhouse, PA, USA.
| | - Anasuya Hazra
- Janssen Research and Development, LLC, 1400 McKean Rd, Springhouse, PA, USA
- Regeneron, Tarrytown, NY, USA
| | - James Juhui Jiao
- Janssen Research and Development, LLC, 920 US Highway 202, Raritan, NJ, USA
| | - Peter Hellemans
- Janssen Pharmaceutica NV, Research and Development BE, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Anna Mitselos
- Janssen Pharmaceutica NV, Research and Development BE, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Hui Tian
- Janssen Research and Development, LLC, 1400 McKean Rd, Springhouse, PA, USA
| | | | | | - Daniele Ouellet
- Janssen Research and Development, LLC, 1400 McKean Rd, Springhouse, PA, USA
| | - Alberto Russu
- Janssen-Cilag SpA, Via Michelangelo Buonarroti 23, 20093, Cologno Monzese, Italy
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Kloeber JA, Lou Z. Critical DNA damaging pathways in tumorigenesis. Semin Cancer Biol 2022; 85:164-184. [PMID: 33905873 PMCID: PMC8542061 DOI: 10.1016/j.semcancer.2021.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/22/2022]
Abstract
The acquisition of DNA damage is an early driving event in tumorigenesis. Premalignant lesions show activated DNA damage responses and inactivation of DNA damage checkpoints promotes malignant transformation. However, DNA damage is also a targetable vulnerability in cancer cells. This requires a detailed understanding of the cellular and molecular mechanisms governing DNA integrity. Here, we review current work on DNA damage in tumorigenesis. We discuss DNA double strand break repair, how repair pathways contribute to tumorigenesis, and how double strand breaks are linked to the tumor microenvironment. Next, we discuss the role of oncogenes in promoting DNA damage through replication stress. Finally, we discuss our current understanding on DNA damage in micronuclei and discuss therapies targeting these DNA damage pathways.
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Affiliation(s)
- Jake A Kloeber
- Department of Oncology, Mayo Clinic, Rochester, MN, 55905, USA; Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, 55905, USA; Mayo Clinic Medical Scientist Training Program, Mayo Clinic, Rochester, MN, 55905, USA
| | - Zhenkun Lou
- Department of Oncology, Mayo Clinic, Rochester, MN, 55905, USA.
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Endo S, Shigeta S, Tokunaga H, Shimizu T, Hasegawa-Minato J, Hashimoto C, Ishibashi M, Nagai T, Shiga N, Shimada M, Yaegashi N. A Retrospective Analysis of Clinical Biomarkers for Olaparib Maintenance Therapy in Patients with Recurrent Ovarian Cancer. TOHOKU J EXP MED 2022; 258:1-9. [PMID: 35705321 DOI: 10.1620/tjem.2022.j050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Shun Endo
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Shogo Shigeta
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Hideki Tokunaga
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Takanori Shimizu
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | | | - Chiaki Hashimoto
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Masumi Ishibashi
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Tomoyuki Nagai
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Naomi Shiga
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Muneaki Shimada
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
| | - Nobuo Yaegashi
- Department of Obstetrics and Gynecology, Tohoku University School of Medicine
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Hu X, Zhang J, Zhang Y, Jiao F, Wang J, Chen H, Ouyang L, Wang Y. Dual-target inhibitors of poly (ADP-ribose) polymerase-1 for cancer therapy: Advances, challenges, and opportunities. Eur J Med Chem 2022; 230:114094. [PMID: 34998039 DOI: 10.1016/j.ejmech.2021.114094] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 02/08/2023]
Abstract
PARP1 plays a crucial role in DNA damage repair, making it an essential target for cancer therapy. PARP1 inhibitors are widely used to treat BRCA-deficient malignancies, and six PARP inhibitors have been approved for clinical use. However, excluding the great clinical success of PARP inhibitors, the concomitant toxicity, drug resistance, and limited scope of application restrict their clinical efficacy. To find solutions to these problems, dual-target inhibitors have shown great potential. In recent years, several studies have linked PAPR1 to other primary cancer targets. Many dual-target inhibitors have been developed using structural fusion, linkage, or library construction methods, overcoming the defects of many single-target inhibitors of PARP1 and achieving great success in clinical cancer therapy. This review summarizes the advance of dual-target PARP1 inhibitors in recent years, focusing on their structural optimization process, structure-activity relationships (SARs), and in vitro or in vivo analysis results.
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Affiliation(s)
- Xinyue Hu
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Jifa Zhang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Ya Zhang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Fulun Jiao
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Jiaxing Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, 38163, Tennessee, United States
| | - Hao Chen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, 38163, Tennessee, United States
| | - Liang Ouyang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Yuxi Wang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, Joint Research Institution of Altitude Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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AKR1B1 as a Prognostic Biomarker of High-Grade Serous Ovarian Cancer. Cancers (Basel) 2022; 14:cancers14030809. [PMID: 35159076 PMCID: PMC8834204 DOI: 10.3390/cancers14030809] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 12/13/2022] Open
Abstract
Simple Summary We evaluated the levels of AKR1B1 and AKR1B10 in 99 patients with high-grade serous ovarian cancer and their association with clinicopathological characteristics, survival, and response to chemotherapy. An immunohistochemical analysis showed that higher AKR1B1 levels correlated with a better disease-free survival of patients whereas we saw no differences for AKR1B10 levels. A multivariant Cox analysis identified high AKR1B1 levels as an important prognostic factor for both overall and disease-free survival. A further analysis revealed no association between AKR1B1 and AKR1B10 levels and response to chemotherapy. Abstract Although aldo-keto reductases (AKRs) have been widely studied in cancer, no study to date has examined the roles of AKR family 1 members B1 (AKR1B1) and B10 (AKR1B10) in a large group of ovarian cancer patients. AKR1B1 and AKR1B10 play a significant role in inflammation and the metabolism of different chemotherapeutics as well as cell differentiation, proliferation, and apoptosis. Due to these functions, we examined the potential of AKR1B1 and AKR1B10 as tissue biomarkers. We assessed the immunohistochemical levels of AKR1B1 and AKR1B10 in tissue paraffin sections from 99 patients with high-grade serous ovarian cancer (HGSC) and compared these levels with clinicopathological characteristics, survival, and response to chemotherapy. A higher immunohistochemical AKR1B1 expression correlated with a better overall and disease-free survival of HGSC patients whereas AKR1B10 expression did not show any significant differences. A multivariant Cox analysis demonstrated that a high AKR1B1 expression was an important prognostic factor for both overall and disease-free survival. However, AKR1B1 and AKR1B10 were not associated with different responses to chemotherapy. Our data suggest that AKR1B1 is involved in the pathogenesis of HGSC and is a potential prognostic biomarker for this cancer.
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Wattenberg MM, Reiss KA. Determinants of Homologous Recombination Deficiency in Pancreatic Cancer. Cancers (Basel) 2021; 13:4716. [PMID: 34572943 PMCID: PMC8466888 DOI: 10.3390/cancers13184716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/10/2021] [Accepted: 09/16/2021] [Indexed: 12/23/2022] Open
Abstract
Pancreatic cancer is a treatment-resistant malignancy associated with high mortality. However, defective homologous recombination (HR), a DNA repair mechanism required for high-fidelity repair of double-strand DNA breaks, is a therapeutic vulnerability. Consistent with this, a subset of patients with pancreatic cancer show unique tumor responsiveness to HR-dependent DNA damage triggered by certain treatments (platinum chemotherapy and PARP inhibitors). While pathogenic mutations in HR genes are a major driver of this sensitivity, another layer of diverse tumor intrinsic and extrinsic factors regulate the HR deficiency (HRD) phenotype. Defining the mechanisms that drive HRD may guide the development of novel strategies and therapeutics to induce treatment sensitivity in non-HRD tumors. Here, we discuss the complexity underlying HRD in pancreatic cancer and highlight implications for identifying and treating this distinct subset of patients.
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Affiliation(s)
- Max M. Wattenberg
- Division of Hematology-Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
- Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kim A. Reiss
- Division of Hematology-Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
- Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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Khan MT, Ali S, Khan AS, Ali A, Khan A, Kaushik AC, Irfan M, Chinnasamy S, Zhang S, Zhang YJ, Cui Z, Wei AJ, Wang Y, Zhao M, Liu K, Wang H, Zeb MT, Wei DQ. Insight into the drug resistance whole genome of Mycobacterium tuberculosis isolates from Khyber Pakhtunkhwa, Pakistan. INFECTION GENETICS AND EVOLUTION 2021; 92:104861. [PMID: 33862292 DOI: 10.1016/j.meegid.2021.104861] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/31/2021] [Accepted: 04/08/2021] [Indexed: 12/17/2022]
Abstract
Whole genome sequencing (WGS) is one of the most reliable methods for detection of drug resistance, genetic diversity in other virulence factor and also evolutionary dynamics of Mycobacterium tuberculosis complex (MTBC). First-line anti-tuberculosis drugs are the major weapons against Mycobacterium tuberculosis (MTB). However, the emergence of drug resistance remained a major obstacle towards global tuberculosis (TB) control program 2030, especially in high burden countries including Pakistan. To overcome the resistance and design potent drugs, genomic variations in drugs targets as well as in the virulence and evolutionary factors might be useful for better understanding and designing potential inhibitors. Here we aimed to find genomic variations in the first-line drugs targets, along with other virulence and evolutionary factors among the circulating isolates in Khyber Pakhtunkhwa, Pakistan. Samples were collected and drug susceptibility testing (DST) was performed as per WHO standard. The resistance samples were subjected to WGS. Among the five whole genome sequences, three samples (NCBI BioProject Accession: PRJNA629298, PRJNA629388) harbored 1997, 1162, and 2053 mutations. Some novel mutations have been detected in drugs targets. Similarly, numerous novel variants have also been detected in virulency and evolutionary factors, PE, PPE, and secretory system of MTB isolates. Exploring the genomic variations among the circulating isolates in geographical specific locations might be useful for future drug designing. To the best of our knowledge, this is the first study that provides useful data regarding the insight genomic variations in virulency, evolutionary factors including ESX and PE/PPE as well as drug targets, for better understanding and management of TB in a WHO declared high burden country.
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Affiliation(s)
- Muhammad Tahir Khan
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Sajid Ali
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Anwar Sheed Khan
- Department of Microbiology, Kohat University of Science and Technology and Provincial Tuberculosis Reference Laboratory, Peshawar, Pakistan.
| | - Arif Ali
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
| | - Abbas Khan
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
| | | | - Muhammad Irfan
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, USA.
| | - Sathishkumar Chinnasamy
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China
| | - Shulin Zhang
- Department of Immunology and Microbiology, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
| | - Yu-Juan Zhang
- College of Life Sciences, Chongqing Normal University, Chongqing, China.
| | - Zhilei Cui
- Zhilei Cui, Department of Respiratory Medicine, XinHua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Amie Jinghua Wei
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China
| | - Yanjie Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China
| | - Mingzhu Zhao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
| | - Kejia Liu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
| | - Heng Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
| | - Muhammad Tariq Zeb
- Khyber Medical University and Senior Research Officer, In-charge Genomic Laboratory, Veterinary Research Institute, Peshawar 25000, Pakistan
| | - Dong Qing Wei
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China; Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nanshan District, Shenzhen, Guangdong 518055, China.
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10
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Ali RMM, McIntosh SA, Savage KI. Homologous recombination deficiency in breast cancer: Implications for risk, cancer development, and therapy. Genes Chromosomes Cancer 2020; 60:358-372. [DOI: 10.1002/gcc.22921] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 11/23/2020] [Indexed: 12/19/2022] Open
Affiliation(s)
- Rayhaan M. M. Ali
- Patrick G Johnston Centre for Cancer Research Queen's University Belfast Belfast UK
| | - Stuart A. McIntosh
- Patrick G Johnston Centre for Cancer Research Queen's University Belfast Belfast UK
| | - Kienan I. Savage
- Patrick G Johnston Centre for Cancer Research Queen's University Belfast Belfast UK
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11
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Khan MT, Ali S, Zeb MT, Kaushik AC, Malik SI, Wei DQ. Gibbs Free Energy Calculation of Mutation in PncA and RpsA Associated With Pyrazinamide Resistance. Front Mol Biosci 2020; 7:52. [PMID: 32328498 PMCID: PMC7160322 DOI: 10.3389/fmolb.2020.00052] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 03/16/2020] [Indexed: 12/16/2022] Open
Abstract
A central approach for better understanding the forces involved in maintaining protein structures is to investigate the protein folding and thermodynamic properties. The effect of the folding process is often disturbed in mutated states. To explore the dynamic properties behind mutations, molecular dynamic (MD) simulations have been widely performed, especially in unveiling the mechanism of drug failure behind mutation. When comparing wild type (WT) and mutants (MTs), the structural changes along with solvation free energy (SFE), and Gibbs free energy (GFE) are calculated after the MD simulation, to measure the effect of mutations on protein structure. Pyrazinamide (PZA) is one of the first-line drugs, effective against latent Mycobacterium tuberculosis isolates, affecting the global TB control program 2030. Resistance to this drug emerges due to mutations in pncA and rpsA genes, encoding pyrazinamidase (PZase) and ribosomal protein S1 (RpsA) respectively. The question of how the GFE may be a measure of PZase and RpsA stabilities, has been addressed in the current review. The GFE and SFE of MTs have been compared with WT, which were already found to be PZA-resistant. WT structures attained a more stable state in comparison with MTs. The physiological effect of a mutation in PZase and RpsA may be due to the difference in energies. This difference between WT and MTs, depicted through GFE plots, might be useful in predicting the stability and PZA-resistance behind mutation. This study provides useful information for better management of drug resistance, to control the global TB problem.
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Affiliation(s)
- Muhammad Tahir Khan
- Department of Bioinformatics and Biosciences, Capital University of Science and Technology, Islamabad, Pakistan
| | - Sajid Ali
- Department of Microbiology, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | | | - Aman Chandra Kaushik
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, Shanghai, China
| | - Shaukat Iqbal Malik
- Department of Bioinformatics and Biosciences, Capital University of Science and Technology, Islamabad, Pakistan
| | - Dong-Qing Wei
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, and Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education, Shanghai Jiao Tong University, Shanghai, China
- Peng Cheng Laboratory, Shenzhen, China
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12
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Rakha EA, Pareja FG. New Advances in Molecular Breast Cancer Pathology. Semin Cancer Biol 2020; 72:102-113. [PMID: 32259641 DOI: 10.1016/j.semcancer.2020.03.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 12/12/2022]
Abstract
Breast cancer (BC) comprises a diverse spectrum of diseases featuring distinct presentation, morphological, biological, and clinical phenotypes. BC behaviour and response to therapy also vary widely. Current evidence indicates that traditional prognostic and predictive classification systems are insufficient to reflect the biological and clinical heterogeneity of BC. Advancements in high-throughput molecular techniques and bioinformatics have contributed to the improved understanding of BC biology, refinement of molecular taxonomies and the development of novel prognostic and predictive molecular assays. Molecular testing has also become increasingly important in the diagnosis and treatment of BC in the era of precision medicine. Despite the enormous amount of research work to develop and refine BC molecular prognostic and predictive assays, it is still in evolution and proper incorporation of these molecular tests into clinical practice to guide patient's management remains a challenge. With the increasing use of more sophisticated high throughput molecular techniques, large amounts of data will continue to emerge, which could potentially lead to identification of novel therapeutic targets and allow more precise classification systems that can accurately predict outcome and response to therapy. In this review, we provide an update on the molecular classification of BC and molecular prognostic assays. Companion diagnostics, contribution of massive parallel sequencing and the use of liquid biopsy are also highlighted.
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Affiliation(s)
- Emad A Rakha
- Department of Histopathology, Division of Cancer and Stem Cells, School of Medicine, The University of Nottingham and Nottingham University Hospitals NHS Trust, Nottingham City Hospital, Nottingham, NG5 1PB, UK.
| | - Fresia G Pareja
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY USA
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13
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Zhu H, Wei M, Xu J, Hua J, Liang C, Meng Q, Zhang Y, Liu J, Zhang B, Yu X, Shi S. PARP inhibitors in pancreatic cancer: molecular mechanisms and clinical applications. Mol Cancer 2020; 19:49. [PMID: 32122376 PMCID: PMC7053129 DOI: 10.1186/s12943-020-01167-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 02/17/2020] [Indexed: 12/13/2022] Open
Abstract
Pancreatic cancer is a highly lethal disease with a poor prognosis, and existing therapies offer only limited effectiveness. Mutation gene sequencing has shown several gene associations that may account for its carcinogenesis, revealing a promising research direction. Poly (ADP-ribose) polymerase (PARP) inhibitors target tumor cells with a homologous recombination repair (HRR) deficiency based on the concept of synthetic lethality. The most prominent target gene is BRCA, in which mutations were first identified in breast cancer and ovarian cancer. PARP inhibitors can trap the PARP-1 protein at a single-stranded break/DNA lesion and disrupt its catalytic cycle, ultimately leading to replication fork progression and consequent double-strand breaks. For tumor cells with BRCA mutations, HRR loss would result in cell death. Pancreatic cancer has also been reported to have a strong relationship with BRCA gene mutations, which indicates that pancreatic cancer patients may benefit from PARP inhibitors. Several clinical trials are being conducted and have begun to yield results. For example, the POLO (Pancreatic Cancer Olaparib Ongoing) trial has demonstrated that the median progression-free survival was observably longer in the olaparib group than in the placebo group. However, PARP inhibitor resistance has partially precluded their use in clinical applications, and the major mechanism underlying this resistance is the restoration of HRR. Therefore, determining how to use PARP inhibitors in more clinical applications and how to avoid adverse effects, as well as prognosis and treatment response biomarkers, require additional research. This review elaborates on future prospects for the application of PARP inhibitors in pancreatic cancer.
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Affiliation(s)
- Heng Zhu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Miaoyan Wei
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Jin Xu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Jie Hua
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Chen Liang
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Qingcai Meng
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Yiyin Zhang
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Jiang Liu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Bo Zhang
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China
| | - Xianjun Yu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. .,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China.
| | - Si Shi
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. .,Pancreatic Cancer Institute, Fudan University; Shanghai Pancreatic Cancer Institute, Dong'An Road, Shanghai, 200032, Xuhui District, China.
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14
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Laera L, Guaragnella N, Giannattasio S, Moro L. 6-Thioguanine and Its Analogs Promote Apoptosis of Castration-Resistant Prostate Cancer Cells in a BRCA2-Dependent Manner. Cancers (Basel) 2019; 11:E945. [PMID: 31284411 PMCID: PMC6678799 DOI: 10.3390/cancers11070945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 07/03/2019] [Indexed: 12/27/2022] Open
Abstract
Background: Mutations in the oncosuppressor gene BReast CAncer susceptibility gene 2 (BRCA2) predispose to aggressive forms of prostate cancer which show poor response to taxane-based therapy, the standard treatment for castration-resistant, aggressive prostate cancer. Herein, we addressed the question whether changes in BRCA2 expression, a potential surrogate marker for BRCA2 activity, may affect the response of castration-resistant prostate cancer cells to 6-thioguanine (6-TG), a thiopurine used in the treatment of haematological malignancies. Methods: Yeast, normal prostate cells and castration-resistant prostate cancer cells were treated with 6-TG or its analogues, in presence or absence of paclitaxel, or with olaparib, a poly-(ADP-ribose) polymerase (PARP) inhibitor currently in clinical trials for treatment of metastatic castration-resistant prostate cancer, and cell proliferation, apoptosis and androgen receptor (AR) levels were measured. Results: 6-TG inhibited cell proliferation in yeast, normal and castration-resistant prostate cancer cells but promoted apoptosis only in cancer cells. Suppression of BRCA2 expression by siRNA or shRNA increased the sensitivity to 6-TG- and olaparib-induced apoptosis but did not affect cancer cell response to taxane. Intriguingly, 6-TG reduced AR expression levels independently on BRCA2 expression. Instead, olaparib decreased AR levels only in BRCA2-knockdown prostate cancer cells. Notably, overexpression of BRCA2 resulted in resistance of castration-resistant prostate cancer cells to 6-TG-, taxane- and olaparib-based treatment but promoted sensitivity to apoptosis induced by 2-amino-6-bromopurine and 2,6-dithiopurine, two 6-TG analogues. Conclusions: Our results provide a pre-clinical rationale for the use of 6-TG in the treatment of BRCA2-deficient castration-resistant prostate cancers, and of certain 6-TG analogues for treatment of BRCA2-proficient prostate cancers.
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Affiliation(s)
- Luna Laera
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Via Amendola 122/O, 70126 Bari, Italy
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via Orabona 4, 70125 Bari, Italy
| | - Nicoletta Guaragnella
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Via Amendola 122/O, 70126 Bari, Italy
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Via Orabona 4, 70125 Bari, Italy
| | - Sergio Giannattasio
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Via Amendola 122/O, 70126 Bari, Italy
| | - Loredana Moro
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Via Amendola 122/O, 70126 Bari, Italy.
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15
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Ganesan S. Tumor Suppressor Tolerance: Reversion Mutations in BRCA1 and BRCA2 and Resistance to PARP Inhibitors and Platinum. JCO Precis Oncol 2018; 2:1-4. [PMID: 35135103 DOI: 10.1200/po.18.00001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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16
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BRCAness and prostate cancer: diagnostic and therapeutic considerations. Prostate Cancer Prostatic Dis 2018; 21:488-498. [DOI: 10.1038/s41391-018-0069-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 02/25/2018] [Accepted: 03/24/2018] [Indexed: 12/14/2022]
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17
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DiSilvestro P, Alvarez Secord A. Maintenance treatment of recurrent ovarian cancer: Is it ready for prime time? Cancer Treat Rev 2018; 69:53-65. [PMID: 29908480 DOI: 10.1016/j.ctrv.2018.06.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 06/01/2018] [Accepted: 06/02/2018] [Indexed: 12/30/2022]
Abstract
Approximately 1% of women in the United States will be diagnosed with epithelial ovarian cancer (EOC) during their lifetime. It is most likely to present at a more advanced stage, requiring aggressive therapeutic measures, and most women will succumb to this illness. Due to advancements in therapy, the oncology community has begun to shift its focus to molecular targeted agents, alternative dosing schedules, and maintenance therapy. Women who achieve a response to initial adjuvant chemotherapy may be candidates for maintenance therapy, with the goal of inducing a lasting remission or prolonging the disease-free interval before recurrence. The rationale for maintenance therapy is to delay disease progression by eliminating residual, slowly-dying cancerous cells, or impeding cell turnover. This review discusses the goals of maintenance therapy for EOC with antiangiogenic agents or poly(adenosine diphosphate-ribose) polymerase (PARP) inhibitors, and reviews clinical studies that have demonstrated improvements in survival outcomes. The side-effect profiles for PARP inhibitors and the implications for preserving quality of life during maintenance therapy will also be discussed.
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Affiliation(s)
- Paul DiSilvestro
- Department of Obstetrics and Gynecology, The Warren Alpert Medical School, Brown University, Providence, RI, United States; Women & Infants' Hospital Program in Women's Oncology, Providence, RI, United States.
| | - Angeles Alvarez Secord
- Gynecology Oncology, Duke Cancer Institute, Durham, NC, United States; The Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Durham, NC, United States
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18
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Guney Eskiler G, Cecener G, Egeli U, Tunca B. Triple negative breast cancer: new therapeutic approaches andBRCAstatus. APMIS 2018; 126:371-379. [DOI: 10.1111/apm.12836] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 02/28/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Gamze Guney Eskiler
- Deparment of Medical Biology; Faculty of Medicine; Sakarya University; Sakarya Turkey
| | - Gulsah Cecener
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
| | - Unal Egeli
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
| | - Berrin Tunca
- Deparment of Medical Biology; Faculty of Medicine; Uludag University; Bursa Turkey
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19
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20
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Rytelewski M, Maleki Vareki S, Mangala LS, Romanow L, Jiang D, Pradeep S, Rodriguez-Aguayo C, Lopez-Berestein G, Figueredo R, Ferguson PJ, Vincent M, Sood AK, Koropatnick JD. Reciprocal positive selection for weakness - preventing olaparib resistance by inhibiting BRCA2. Oncotarget 2018; 7:20825-39. [PMID: 26959114 PMCID: PMC4991495 DOI: 10.18632/oncotarget.7883] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/17/2016] [Indexed: 12/20/2022] Open
Abstract
Human tumor heterogeneity promotes therapeutic failure by increasing the likelihood of resistant cell subpopulations. The PARP-1 inhibitor olaparib is approved for use in BRCA-mutated ovarian cancers but BRCA2-reversion mutations lead to functional homologous recombination repair (HRR) and olaparib resistance. To overcome that resistance and expand use of PARP1 inhibition to cancers with functional HRR, we developed an antisense strategy to render the majority of tumor cells in a population BRCA2-deficient. We predicted that this strategy would render HRR-proficient tumor cells sensitive to olaparib and prevent emergence of resistance in a tumor cell population heterogeneous for HRR proficiency. We report that BRCA2 downregulation sensitized multiple human tumor cell lines (but not non-cancer human kidney cells) to olaparib and, combined with olaparib, increased aneuploidy and chromosomal translocations in human tumor cells. In a mixed HRR-proficient and HRR-deficient cell population, olaparib monotherapy allowed outgrowth of HRR-proficient cells resistant to subsequent olaparib treatment. Combined BRCA2 inhibition and olaparib treatment prevented selection of HRR-proficient cells and inhibited proliferation of the entire population. Treatment with BRCA2 siRNA and olaparib decreased ovarian xenograft growth in mice more effectively than either treatment alone. In vivo use of BRCA2 antisense oligonucleotides may be a viable option to expand clinical use of olaparib and prevent resistance.
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Affiliation(s)
- Mateusz Rytelewski
- Department of Microbiology and Immunology, Western University, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
| | | | - Lingegowda S Mangala
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for RNA Interference and Non-coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Larissa Romanow
- Department of Microbiology and Immunology, Western University, London, ON, Canada
| | - Dahai Jiang
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sunila Pradeep
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Christian Rodriguez-Aguayo
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gabriel Lopez-Berestein
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for RNA Interference and Non-coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Rene Figueredo
- Department of Oncology, Western University, London, ON, Canada
| | | | - Mark Vincent
- Department of Oncology, Western University, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for RNA Interference and Non-coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - James D Koropatnick
- Department of Microbiology and Immunology, Western University, London, ON, Canada.,Department of Oncology, Western University, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
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21
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Emerging Therapeutics to Overcome Chemoresistance in Epithelial Ovarian Cancer: A Mini-Review. Int J Mol Sci 2017; 18:ijms18102171. [PMID: 29057791 PMCID: PMC5666852 DOI: 10.3390/ijms18102171] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 12/14/2022] Open
Abstract
Ovarian cancer is the fifth leading cause of cancer death among women and the most lethal gynecologic malignancy. One of the leading causes of death in high-grade serous ovarian cancer (HGSOC) is chemoresistant disease, which may present as intrinsic or acquired resistance to therapies. Here we discuss some of the known molecular mechanisms of chemoresistance that have been exhaustively investigated in chemoresistant ovarian cancer, including drug efflux pump multidrug resistance protein 1 (MDR1), the epithelial–mesenchymal transition, DNA damage and repair capacity. We also discuss novel therapeutics that may address some of the challenges in bringing approaches that target chemoresistant processes from bench to bedside. Some of these new therapies include novel drug delivery systems, targets that may halt adaptive changes in the tumor, exploitation of tumor mutations that leave cancer cells vulnerable to irreversible damage, and novel drugs that target ribosomal biogenesis, a process that may be uniquely different in cancer versus non-cancerous cells. Each of these approaches, or a combination of them, may provide a greater number of positive outcomes for a broader population of HGSOC patients.
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22
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Chand SN, Zarei M, Schiewer MJ, Kamath AR, Romeo C, Lal S, Cozzitorto JA, Nevler A, Scolaro L, Londin E, Jiang W, Meisner-Kober N, Pishvaian MJ, Knudsen KE, Yeo CJ, Pascal JM, Winter JM, Brody JR. Posttranscriptional Regulation of PARG mRNA by HuR Facilitates DNA Repair and Resistance to PARP Inhibitors. Cancer Res 2017; 77:5011-5025. [PMID: 28687616 PMCID: PMC5663502 DOI: 10.1158/0008-5472.can-16-2704] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/23/2016] [Accepted: 06/29/2017] [Indexed: 01/08/2023]
Abstract
The majority of pancreatic ductal adenocarcinomas (PDAC) rely on the mRNA stability factor HuR (ELAV-L1) to drive cancer growth and progression. Here, we show that CRISPR-Cas9-mediated silencing of the HuR locus increases the relative sensitivity of PDAC cells to PARP inhibitors (PARPi). PDAC cells treated with PARPi stimulated translocation of HuR from the nucleus to the cytoplasm, specifically promoting stabilization of a new target, poly (ADP-ribose) glycohydrolase (PARG) mRNA, by binding a unique sequence embedded in its 3' untranslated region. HuR-dependent upregulation of PARG expression facilitated DNA repair via hydrolysis of polyADP-ribose on related repair proteins. Accordingly, strategies to inhibit HuR directly promoted DNA damage accumulation, inefficient PAR removal, and persistent PARP-1 residency on chromatin (PARP-1 trapping). Immunoprecipitation assays demonstrated that the PARP-1 protein binds and posttranslationally modifies HuR in PARPi-treated PDAC cells. In a mouse xenograft model of human PDAC, PARPi monotherapy combined with targeted silencing of HuR significantly reduced tumor growth compared with PARPi therapy alone. Our results highlight the HuR-PARG axis as an opportunity to enhance PARPi-based therapies. Cancer Res; 77(18); 5011-25. ©2017 AACR.
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MESH Headings
- Animals
- Apoptosis
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Pancreatic Ductal/genetics
- Carcinoma, Pancreatic Ductal/metabolism
- Carcinoma, Pancreatic Ductal/pathology
- Cell Nucleus/drug effects
- Cell Nucleus/genetics
- Cell Proliferation
- DNA Damage/drug effects
- DNA Damage/genetics
- DNA Repair/drug effects
- DNA Repair/genetics
- Drug Resistance, Neoplasm/genetics
- ELAV-Like Protein 1/antagonists & inhibitors
- ELAV-Like Protein 1/genetics
- ELAV-Like Protein 1/metabolism
- Female
- Glycoside Hydrolases/genetics
- Humans
- Mice
- Mice, Nude
- Pancreatic Neoplasms/genetics
- Pancreatic Neoplasms/metabolism
- Pancreatic Neoplasms/pathology
- Poly(ADP-ribose) Polymerase Inhibitors/pharmacology
- Poly(ADP-ribose) Polymerases/chemistry
- RNA Processing, Post-Transcriptional
- RNA, Messenger/genetics
- Tumor Cells, Cultured
- Up-Regulation
- Xenograft Model Antitumor Assays
- Pancreatic Neoplasms
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Affiliation(s)
- Saswati N Chand
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Mahsa Zarei
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Matthew J Schiewer
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Akshay R Kamath
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Carmella Romeo
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Shruti Lal
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Joseph A Cozzitorto
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Avinoam Nevler
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Laura Scolaro
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Eric Londin
- Computational Medicine Center, Thomas Jefferson University, Philadelphia, Pennsylvania
- Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Wei Jiang
- Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | | | - Michael J Pishvaian
- Division of Hematology and Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC
| | - Karen E Knudsen
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Charles J Yeo
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - John M Pascal
- Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, Québec, Canada
| | - Jordan M Winter
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jonathan R Brody
- Department of Surgery, The Jefferson Pancreas, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania.
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23
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Dhawan MS, Bartelink IH, Aggarwal RR, Leng J, Zhang JZ, Pawlowska N, Terranova-Barberio M, Grabowsky JA, Gewitz A, Chien AJ, Moasser M, Kelley RK, Maktabi T, Thomas S, Munster PN. Differential Toxicity in Patients with and without DNA Repair Mutations: Phase I Study of Carboplatin and Talazoparib in Advanced Solid Tumors. Clin Cancer Res 2017; 23:6400-6410. [PMID: 28790114 DOI: 10.1158/1078-0432.ccr-17-0703] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/24/2017] [Accepted: 08/04/2017] [Indexed: 11/16/2022]
Abstract
Purpose: The PARP inhibitor (PARPi) talazoparib may potentiate activity of chemotherapy and toxicity in cells vulnerable to DNA damage.Experimental Design: This phase I study evaluated the safety, tolerability, pharmacokinetics, and efficacy of talazoparib and carboplatin. Pharmacokinetic modeling explored associations between DNA vulnerability and hematologic toxicity.Results: Twenty-four patients (eight males; 16 females) with solid tumors were enrolled in four cohorts at 0.75 and 1 mg daily talazoparib and weekly carboplatin (AUC 1 and 1.5, every 2 weeks or every 3 weeks), including 14 patients (58%) with prior platinum treatment. Dose-limiting toxicities included grade 3 fatigue and grade 4 thrombocytopenia; the MTD was not reached. Grade 3/4 toxicities included fatigue (13%), neutropenia (63%), thrombocytopenia (29%), and anemia (38%). After cycle 2's dose, delays/reductions were required in all patients. One complete and two partial responses occurred in germline BRCA1/2 (gBRCA1/2) patients. Four patients showed stable disease beyond 4 months, three of which had known mutations in DNA repair pathways. Pharmacokinetic toxicity modeling suggests that after three cycles of carboplatin AUC 1.5 every 3 weeks and talazoparib 1 mg daily, neutrophil counts decreased 78% [confidence interval (CI), 87-68] from baseline in gBRCA carriers and 63% (CI, 72-55) in noncarriers (P < 0.001). Pharmacokinetic toxicity modeling suggests an intermittent, pulse dosing schedule of PARP inhibition, differentiated by gBRCA mutation status, may improve the benefit/risk ratio of combination therapy.Conclusions: Carboplatin and talazoparib showed efficacy in DNA damage mutation carriers, but hematologic toxicity was more pronounced in gBRCA carriers. Carboplatin is best combined with intermittent talazoparib dosing differentiated by germline and somatic DNA damage mutation carriers. Clin Cancer Res; 23(21); 6400-10. ©2017 AACR.
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Affiliation(s)
| | | | | | - Jim Leng
- University of California, San Francisco, San Francisco, CA
| | - Jenna Z Zhang
- University of California, San Francisco, San Francisco, CA
| | - Nela Pawlowska
- University of California, San Francisco, San Francisco, CA
| | | | | | - Andrew Gewitz
- University of California, San Francisco, San Francisco, CA
| | - Amy J Chien
- University of California, San Francisco, San Francisco, CA
| | - Mark Moasser
- University of California, San Francisco, San Francisco, CA
| | - Robin K Kelley
- University of California, San Francisco, San Francisco, CA
| | - Tayeba Maktabi
- University of California, San Francisco, San Francisco, CA
| | - Scott Thomas
- University of California, San Francisco, San Francisco, CA
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24
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Haass NK, Gabrielli B. Cell cycle-tailored targeting of metastatic melanoma: Challenges and opportunities. Exp Dermatol 2017; 26:649-655. [PMID: 28109167 DOI: 10.1111/exd.13303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2017] [Indexed: 12/21/2022]
Abstract
The advent of targeted therapies of metastatic melanoma, such as MAPK pathway inhibitors and immune checkpoint antagonists, has turned dermato-oncology from the "bad guy" to the "poster child" in oncology. Current targeted therapies are effective, although here is a clear need to develop combination therapies to delay the onset of resistance. Many antimelanoma drugs impact on the cell cycle but are also dependent on certain cell cycle phases resulting in cell cycle phase-specific drug insensitivity. Here, we raise the question: Have combination trials been abandoned prematurely as ineffective possibly only because drug scheduling was not optimized? Firstly, if both drugs of a combination hit targets in the same melanoma cell, cell cycle-mediated drug insensitivity should be taken into account when planning combination therapies, timing of dosing schedules and choice of drug therapies in solid tumors. Secondly, if the combination is designed to target different tumor cell subpopulations of a heterogeneous tumor, one drug effective in a particular subpopulation should not negatively impact on the other drug targeting another subpopulation. In addition to the role of cell cycle stage and progression on standard chemotherapeutics and targeted drugs, we discuss the utilization of cell cycle checkpoint control defects to enhance chemotherapeutic responses or as targets themselves. We propose that cell cycle-tailored targeting of metastatic melanoma could further improve therapy outcomes and that our real-time cell cycle imaging 3D melanoma spheroid model could be utilized as a tool to measure and design drug scheduling approaches.
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Affiliation(s)
- Nikolas K Haass
- The University of Queensland Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, Qld, Australia.,The Centenary Institute, Newtown, NSW, Australia.,Discipline of Dermatology, University of Sydney, Sydney, NSW, Australia
| | - Brian Gabrielli
- Mater Medical Research Institute, Translational Research Institute, The University of Queensland, Brisbane, Qld, Australia
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25
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Pishvaian MJ, Biankin AV, Bailey P, Chang DK, Laheru D, Wolfgang CL, Brody JR. BRCA2 secondary mutation-mediated resistance to platinum and PARP inhibitor-based therapy in pancreatic cancer. Br J Cancer 2017; 116:1021-1026. [PMID: 28291774 PMCID: PMC5396101 DOI: 10.1038/bjc.2017.40] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/29/2016] [Accepted: 01/16/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Pancreatic cancer has become the third leading cause of cancer death with minimal improvements in outcome for over 40 years. Recent trials of therapies that target-defective DNA maintenance using poly (ADP-ribose) polymerase (PARP) inhibitors are showing promising results, yet invariably patients recur and succumb to disease. Mechanisms of resistance to platinum-based and PARP inhibitor therapy in other cancer types include secondary mutations, which restore the integrity of DNA repair through an increasing number of different mechanisms. METHODS Here we present a case of a 63-year-old female patient with a germ line pathogenic BRCA2 mutation (6714 deletion) who developed pancreatic cancer and had an exceptional response to platinum and PARP inhibitor therapy. Through next-generation sequencing and clinical follow-up, we correlated tumour response and resistance to the BRCA2 mutational status in the tumour. RESULTS Initially, the patient had an exceptional response to platinum and PARP inhibitor therapy, most likely due to the BRCA2 mutation. However, the primary lesion recurred while on PARP inhibitor therapy and contained a secondary mutation in BRCA2, which mostly likely restored BRCA2 function in PARP inhibitor-resistant tumour cells. CONCLUSIONS To our knowledge, this is the first report of a BRCA2 reversion mutation that conferred resistance to PARP inhibitor-based therapy in a pancreatic ductal adenocarcinoma patient. Future studies are needed to understand this important mechanism of resistance and how it may impact the choice of therapy for patients with pancreatic cancer.
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Affiliation(s)
- Michael J Pishvaian
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Andrew V Biankin
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK
- West of Scotland Pancreatic Unit, Glasgow Royal Infirmary, Glasgow G31 2ER, UK
- Faculty of Medicine, South Western Sydney Clinical School, University of NSW, Liverpool, New South Wales 2170, Australia
| | - Peter Bailey
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK
| | - David K Chang
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK
- West of Scotland Pancreatic Unit, Glasgow Royal Infirmary, Glasgow G31 2ER, UK
- Faculty of Medicine, South Western Sydney Clinical School, University of NSW, Liverpool, New South Wales 2170, Australia
| | - Daniel Laheru
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA
| | | | - Jonathan R Brody
- Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA
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26
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Kim Y, Kim A, Sharip A, Sharip A, Jiang J, Yang Q, Xie Y. Reverse the Resistance to PARP Inhibitors. Int J Biol Sci 2017; 13:198-208. [PMID: 28255272 PMCID: PMC5332874 DOI: 10.7150/ijbs.17240] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 09/09/2016] [Indexed: 12/24/2022] Open
Abstract
One of the DNA repair machineries is activated by Poly (ADP-ribose) Polymerase (PARP) enzyme. Particularly, this enzyme is involved in repair of damages to single-strand DNA, thus decreasing the chances of generating double-strand breaks in the genome. Therefore, the concept to block PARP enzymes by PARP inhibitor (PARPi) was appreciated in cancer treatment. PARPi has been designed and tested for many years and became a potential supplement for the conventional chemotherapy. However, increasing evidence indicates the appearance of the resistance to this treatment. Specifically, cancer cells may acquire new mutations or events that overcome the positive effect of these drugs. This paper describes several molecular mechanisms of PARPi resistance which were reported most recently, and summarizes some strategies to reverse this type of drug resistance.
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Affiliation(s)
- Yevgeniy Kim
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Aleksei Kim
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Ainur Sharip
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Aigul Sharip
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Juhong Jiang
- Department of Pathology, the First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Qing Yang
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
| | - Yingqiu Xie
- Department of Biology, Nazarbayev University, School of Science and Technology, Astana, 010000, Republic of Kazakhstan
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27
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Nair RS, Potti ME, Thankappan R, Chandrika SK, Kurup MRP, Srinivas P. Molecular trail for the anticancer behavior of a novel copper carbohydrazone complex in BRCA1 mutated breast cancer. Mol Carcinog 2017; 56:1501-1514. [PMID: 28052399 DOI: 10.1002/mc.22610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/28/2016] [Accepted: 12/31/2016] [Indexed: 01/25/2023]
Abstract
Novel chelated metal complexes were synthesized from carbohydrazones to thiocarbohydrazones using metal-based drug designing platforms and their combination effect with Pb, a naphthaquinone were analyzed for anticancer activity in breast cancer cell lines. A panel of BRCA1 wild-type and mutated breast cancer cells: MCF-7 (BRCA1+ /ER+ ), MDA-MB-231 (BRCA1+ /ERα- ), HCC-1937 (BRCA1- /ERα- ), HCC1937/wt BRCA1, MX1 (BRCA1- /ERα- ), and MDA-MB-436 (BRCA1- /ERα- ) were screened for anti-cancer activity. Cu2 (HL)(HSO4 ) · H2 O]SO4 · 6 H2 O (CS2) is the most potent anticancer agent among the copper carbohydrazone and thiocarbohydrazone complexes analyzed in this study. It can be suggested that the presence of sulphate, as pharmacologically active centre, can induce cytotoxicity more effectively when compared to chlorine, bromine, perchlorate, and methanol. This is the first report demonstrating that CS2 can bind to DNA by hindering BamH1 activity and could induce DNA double strand breaks as evidenced by γ-H2AX expression. In addition to this, CS2 could also act as a Topo II inhibitor at a much lower concentration than etoposide and induce apoptosis, making it a potent anticancer agent. In combination with Pb, a potent ROS inducer, CS2 could induce synergistic anti-cancer activity in HR/ BRCA1 defective breast cancer cells. This is the first study reporting the mechanism involved in the induction of apoptosis for a metal chelated copper carbohydrazone complex and its combination effects with Pb in HR defective, BRCA1 mutated breast cancer cells.
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Affiliation(s)
- Rakesh Sathish Nair
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
| | - Manoj Easwaran Potti
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochin, Kerala, India
| | - Ratheeshkumar Thankappan
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
| | | | | | - Priya Srinivas
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
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28
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Colmegna B, Morosi L, D'Incalci M. Molecular and Pharmacological Mechanisms of Drug Resistance:An Evolving Paradigm. Handb Exp Pharmacol 2017; 249:1-12. [PMID: 28332049 DOI: 10.1007/164_2017_20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The high heterogeneity and genomic instability of malignant tumors explains why even responsive tumors contain cell clones that are resistant for many possible mechanisms involving intracellular drug inactivation, low uptake or high efflux of anticancer drugs from cancer cells, qualitative or quantitative changes in the drug target. Many tumors, however, are resistant because of insufficient exposure to anticancer drugs, due to pharmacokinetic reasons and inefficient and heterogeneous tumor drug distribution, related to a deficient vascularization and high interstitial pressure. Finally, resistance can be related to the activation of anti-apoptotic and cell survival pathways by cancer cells and often enhanced by tumor microenvironment.
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Affiliation(s)
- Benedetta Colmegna
- Department of Oncology, IRCCS 'Mario Negri', Institute for Pharmacological Research, 20145, Milan, Italy
| | - Lavinia Morosi
- Department of Oncology, IRCCS 'Mario Negri', Institute for Pharmacological Research, 20145, Milan, Italy
| | - Maurizio D'Incalci
- Department of Oncology, IRCCS 'Mario Negri', Institute for Pharmacological Research, 20145, Milan, Italy.
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29
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Breast Cancer Genomics. Breast Cancer 2017. [DOI: 10.1007/978-3-319-48848-6_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Castiglione R, Ihle MA, Heydt C, Schultheis AM, Merkelbach-Bruse S, Mauch C, Büttner R. The impact of sequencing on diagnosis and treatment of malignant melanoma. Expert Rev Mol Diagn 2016; 16:423-33. [PMID: 26822148 DOI: 10.1586/14737159.2016.1147958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Melanoma is one of the clinically most important cancer types considering its high mortality rate and that it is commonly diagnosed in relatively young people. With the advent of targeted therapies and, more recently, immune checkpoint inhibitors, more treatment options are available resulting in higher patient survival rates. However, the successful application of these targeted therapies critically depends on the reliable detection of molecular aberrations. Today, massively parallel sequencing techniques enable us to analyze large sets of genes in a relatively short time. It has allowed increased knowledge of acquired somatic mutations in melanoma and has helped to identify new targets for personalized therapy, and potentially may help to predict response to immune therapies. Described here are the development of sequencing techniques, how their improvement has changed diagnosis, prognosis and management of malignant melanoma and the future perspectives of melanoma diagnostics in the routine clinical setting.
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Affiliation(s)
| | - Michaela A Ihle
- a Institute of Pathology , University Hospital Cologne , Cologne , Germany
| | - Carina Heydt
- a Institute of Pathology , University Hospital Cologne , Cologne , Germany
| | - Anne M Schultheis
- a Institute of Pathology , University Hospital Cologne , Cologne , Germany
| | | | - Cornelia Mauch
- b Clinic for Dermatology , University Hospital Cologne , Cologne , Germany
| | - Reinhard Büttner
- a Institute of Pathology , University Hospital Cologne , Cologne , Germany
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31
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Knudsen ES, O’Reilly EM, Brody JR, Witkiewicz AK. Genetic Diversity of Pancreatic Ductal Adenocarcinoma and Opportunities for Precision Medicine. Gastroenterology 2016; 150:48-63. [PMID: 26385075 PMCID: PMC5010785 DOI: 10.1053/j.gastro.2015.08.056] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 12/20/2022]
Abstract
Patients with pancreatic ductal adenocarcinoma (PDA) have a poor prognosis despite new treatments; approximately 7% survive for 5 years. Although there have been advances in systemic, primarily cytotoxic, therapies, it has been a challenge to treat patients with PDA using targeted therapies. Sequence analyses have provided a wealth of information about the genetic features of PDA and have identified potential therapeutic targets. Preclinical and early-phase clinical studies have found specific pathways could be rationally targeted; it might also be possible to take advantage of the genetic diversity of PDAs to develop therapeutic agents. The genetic diversity and instability of PDA cells have long been thought of as obstacles to treatment, but are now considered exploitable features. We review the latest findings in pancreatic cancer genetics and the promise of targeted approaches in PDA therapy.
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Affiliation(s)
- Erik S. Knudsen
- Simmons Cancer Center, University of Texas Southwestern Medical Center, TX,Department of Pathology, University of Texas Southwestern Medical Center, TX,CORRESPONDENCE, Erik Knudsen, PHD, UTSW, Dallas TX, , Agnieszka Witkiewicz, UTSW, Dallas TX,
| | - Eileen M. O’Reilly
- Department of Medicine, Gastrointestinal Oncology Service, Memorial Sloan Kettering Cancer Center, NY
| | - Jonathan R. Brody
- Department of Surgery, Jefferson Pancreatic, Biliary, and Related Cancer Center, Thomas Jefferson University, PA
| | - Agnieszka K. Witkiewicz
- Simmons Cancer Center, University of Texas Southwestern Medical Center, TX,Department of Pathology, University of Texas Southwestern Medical Center, TX,CORRESPONDENCE, Erik Knudsen, PHD, UTSW, Dallas TX, , Agnieszka Witkiewicz, UTSW, Dallas TX,
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32
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Zarogoulidis P, Petanidis S, Kioseoglou E, Domvri K, Anestakis D, Zarogoulidis K. MiR-205 and miR-218 expression is associated with carboplatin chemoresistance and regulation of apoptosis via Mcl-1 and Survivin in lung cancer cells. Cell Signal 2015; 27:1576-88. [PMID: 25917317 DOI: 10.1016/j.cellsig.2015.04.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/20/2015] [Accepted: 04/20/2015] [Indexed: 01/19/2023]
Abstract
Lung cancer chemoresistance is the most frequent barrier in lung cancer therapy. Recent studies have indicated that microRNAs play a significant role in this mechanism and can function as either tumor suppressor or tumor promoters. However the effect of miRNA in lung cancer chemoresistance is poorly understood. Therefore, in the present study we investigated the role of two distinct miR members, the miR-205 and the tumor suppressor miR-218 in the proliferation, invasion and induction of apoptosis in lung cancer cells after carboplatin treatment. The results showed that miR-205 overexpression in A549 and H1975 lung cancer cells is concurrent with the down regulation of miR-218 and in linked with carboplatin sensitivity and chemoresistance. Interestingly, ectopic miR-218 overexpression reduced cell proliferation, invasion and migration of lung cancer cells, whereas miR-205 rescued the suppressive effect of miR-218 by altering the expression levels of the pro-apoptotic proteins PARP, Caspase 3, Bax and upregulating the anti-apoptotic markers Mcl-1 and Survivin. Taken together our findings imply that the miRNAs miR-205 and miR-218 play a key role in the development of lung cancer acquired chemoresistance and the tumor suppressor role of miR-218 in inhibiting lung cancer cell tumorigenesis and overcoming platinum chemoresistance is significant for future cancer therapeutic approaches.
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Affiliation(s)
- Paul Zarogoulidis
- Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki 57010, Greece
| | - Savvas Petanidis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
| | - Efrosini Kioseoglou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Kalliopi Domvri
- Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki 57010, Greece
| | - Doxakis Anestakis
- Department of Medicine, Laboratory of General Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece; Department of Medicine, Laboratory of Forensic Medicine and Toxicology, Aristotle University of Thessaloniki, 54124, Greece
| | - Konstantinos Zarogoulidis
- Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki 57010, Greece
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33
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Zhang J, Lou X, Zellmer L, Liu S, Xu N, Liao DJ. Just like the rest of evolution in Mother Nature, the evolution of cancers may be driven by natural selection, and not by haphazard mutations. Oncoscience 2014; 1:580-90. [PMID: 25594068 PMCID: PMC4278337 DOI: 10.18632/oncoscience.83] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 09/17/2014] [Indexed: 12/24/2022] Open
Abstract
Sporadic carcinogenesis starts from immortalization of a differentiated somatic cell or an organ-specific stem cell. The immortalized cell incepts a new or quasinew organism that lives like a parasite in the patient and usually proceeds to progressive simplification, constantly engendering intermediate organisms that are simpler than normal cells. Like organismal evolution in Mother Nature, this cellular simplification is a process of Darwinian selection of those mutations with growth- or survival-advantages, from numerous ones that occur randomly and stochastically. Therefore, functional gain of growth- or survival-sustaining oncogenes and functional loss of differentiation-sustaining tumor suppressor genes, which are hallmarks of cancer cells and contribute to phenotypes of greater malignancy, are not drivers of carcinogenesis but are results from natural selection of advantageous mutations. Besides this mutation-load dependent survival mechanism that is evolutionarily low and of an asexual nature, cancer cells may also use cell fusion for survival, which is an evolutionarily-higher mechanism and is of a sexual nature. Assigning oncogenes or tumor suppressor genes or their mutants as drivers to induce cancer in animals may somewhat coerce them to create man-made oncogenic pathways that may not really be a course of sporadic cancer formations in the human.
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Affiliation(s)
- Ju Zhang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Xiaomin Lou
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Lucas Zellmer
- Hormel Institute, University of Minnesota, Austin, MN 55912, USA
| | - Siqi Liu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Ningzhi Xu
- Laboratory of Cell and Molecular Biology, Cancer Institute, Chinese Academy of Medical Science, Beijing 100021, P.R. China
| | - D Joshua Liao
- Hormel Institute, University of Minnesota, Austin, MN 55912, USA
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Lupo B, Trusolino L. Inhibition of poly(ADP-ribosyl)ation in cancer: old and new paradigms revisited. Biochim Biophys Acta Rev Cancer 2014; 1846:201-15. [PMID: 25026313 DOI: 10.1016/j.bbcan.2014.07.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 06/02/2014] [Accepted: 07/08/2014] [Indexed: 01/31/2023]
Abstract
Inhibitors of poly(ADP-ribose) polymerases actualized the biological concept of synthetic lethality in the clinical practice, yielding a paradigmatic example of translational medicine. The profound sensitivity of tumors with germline BRCA mutations to PARP1/2 blockade owes to inherent defects of the BRCA-dependent homologous recombination machinery, which are unleashed by interruption of PARP DNA repair activity and lead to DNA damage overload and cell death. Conversely, aspirant BRCA-like tumors harboring somatic DNA repair dysfunctions (a vast entity of genetic and epigenetic defects known as "BRCAness") not always align with the familial counterpart and appear not to be equally sensitive to PARP inhibition. The acquisition of secondary resistance in initially responsive patients and the lack of standardized biomarkers to identify "BRCAness" pose serious threats to the clinical advance of PARP inhibitors; a feeling is also emerging that a BRCA-centered perspective might have missed the influence of additional, not negligible and DNA repair-independent PARP contributions onto therapy outcome. While regulatory approval for PARP1/2 inhibitors is still pending, novel therapeutic opportunities are sprouting from different branches of the PARP family, although they remain immature for clinical extrapolation. This review is an endeavor to provide a comprehensive appraisal of the multifaceted biology of PARPs and their evolving impact on cancer therapeutics.
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Affiliation(s)
- Barbara Lupo
- Department of Oncology, University of Torino Medical School, 10060 Candiolo, Torino, Italy; Laboratory of Molecular Pharmacology, Candiolo Cancer Institute, FPO IRCCS, 10060 Candiolo, Torino, Italy
| | - Livio Trusolino
- Department of Oncology, University of Torino Medical School, 10060 Candiolo, Torino, Italy; Laboratory of Molecular Pharmacology, Candiolo Cancer Institute, FPO IRCCS, 10060 Candiolo, Torino, Italy.
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Rytelewski M, Tong JG, Buensuceso A, Leong HS, Maleki Vareki S, Figueredo R, Di Cresce C, Wu SY, Herbrich SM, Baggerly KA, Romanow L, Shepherd T, Deroo BJ, Sood AK, Chambers AF, Vincent M, Ferguson PJ, Koropatnick J. BRCA2 inhibition enhances cisplatin-mediated alterations in tumor cell proliferation, metabolism, and metastasis. Mol Oncol 2014. [PMID: 24974076 DOI: 10.1016/j.molonc.2014.05.017]+[] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Tumor cells have unstable genomes relative to non-tumor cells. Decreased DNA integrity resulting from tumor cell instability is important in generating favorable therapeutic indices, and intact DNA repair mediates resistance to therapy. Targeting DNA repair to promote the action of anti-cancer agents is therefore an attractive therapeutic strategy. BRCA2 is involved in homologous recombination repair. BRCA2 defects increase cancer risk but, paradoxically, cancer patients with BRCA2 mutations have better survival rates. We queried TCGA data and found that BRCA2 alterations led to increased survival in patients with ovarian and endometrial cancer. We developed a BRCA2-targeting second-generation antisense oligonucleotide (ASO), which sensitized human lung, ovarian, and breast cancer cells to cisplatin by as much as 60%. BRCA2 ASO treatment overcame acquired cisplatin resistance in head and neck cancer cells, but induced minimal cisplatin sensitivity in non-tumor cells. BRCA2 ASO plus cisplatin reduced respiration as an early event preceding cell death, concurrent with increased glucose uptake without a difference in glycolysis. BRCA2 ASO and cisplatin decreased metastatic frequency in vivo by 77%. These results implicate BRCA2 as a regulator of metastatic frequency and cellular metabolic response following cisplatin treatment. BRCA2 ASO, in combination with cisplatin, is a potential therapeutic anti-cancer agent.
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Affiliation(s)
- Mateusz Rytelewski
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jessica G Tong
- Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada
| | - Adrian Buensuceso
- Department of Biochemistry, Western University, London, Ontario, Canada
| | - Hon S Leong
- Department of Surgery, Western University, London, Ontario, Canada
| | - Saman Maleki Vareki
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Rene Figueredo
- Department of Oncology, Western University, London, Ontario, Canada
| | - Christine Di Cresce
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Sherry Y Wu
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Shelley M Herbrich
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Keith A Baggerly
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Larissa Romanow
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Trevor Shepherd
- Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada
| | - Bonnie J Deroo
- Department of Biochemistry, Western University, London, Ontario, Canada
| | - Anil K Sood
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA; Center for RNAi and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ann F Chambers
- Department of Oncology, Western University, London, Ontario, Canada
| | - Mark Vincent
- Department of Oncology, Western University, London, Ontario, Canada; Department of Pathology, Western University, London, Ontario, Canada
| | - Peter J Ferguson
- Department of Oncology, Western University, London, Ontario, Canada; Lawson Health Research Institute, London Health Sciences Centre, London, Ontario, Canada
| | - James Koropatnick
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada; Department of Oncology, Western University, London, Ontario, Canada; Department of Pathology, Western University, London, Ontario, Canada; Department of Physiology and Pharmacology, Western University, London, Ontario, Canada; Lawson Health Research Institute, London Health Sciences Centre, London, Ontario, Canada.
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BRCA2 inhibition enhances cisplatin-mediated alterations in tumor cell proliferation, metabolism, and metastasis. Mol Oncol 2014. [PMID: 24974076 DOI: 10.1016/j.molonc.2014.05.017] [] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Tumor cells have unstable genomes relative to non-tumor cells. Decreased DNA integrity resulting from tumor cell instability is important in generating favorable therapeutic indices, and intact DNA repair mediates resistance to therapy. Targeting DNA repair to promote the action of anti-cancer agents is therefore an attractive therapeutic strategy. BRCA2 is involved in homologous recombination repair. BRCA2 defects increase cancer risk but, paradoxically, cancer patients with BRCA2 mutations have better survival rates. We queried TCGA data and found that BRCA2 alterations led to increased survival in patients with ovarian and endometrial cancer. We developed a BRCA2-targeting second-generation antisense oligonucleotide (ASO), which sensitized human lung, ovarian, and breast cancer cells to cisplatin by as much as 60%. BRCA2 ASO treatment overcame acquired cisplatin resistance in head and neck cancer cells, but induced minimal cisplatin sensitivity in non-tumor cells. BRCA2 ASO plus cisplatin reduced respiration as an early event preceding cell death, concurrent with increased glucose uptake without a difference in glycolysis. BRCA2 ASO and cisplatin decreased metastatic frequency in vivo by 77%. These results implicate BRCA2 as a regulator of metastatic frequency and cellular metabolic response following cisplatin treatment. BRCA2 ASO, in combination with cisplatin, is a potential therapeutic anti-cancer agent.
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BRCA2 inhibition enhances cisplatin-mediated alterations in tumor cell proliferation, metabolism, and metastasis. Mol Oncol 2014; 8:1429-40. [PMID: 24974076 DOI: 10.1016/j.molonc.2014.05.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 05/28/2014] [Indexed: 12/14/2022] Open
Abstract
Tumor cells have unstable genomes relative to non-tumor cells. Decreased DNA integrity resulting from tumor cell instability is important in generating favorable therapeutic indices, and intact DNA repair mediates resistance to therapy. Targeting DNA repair to promote the action of anti-cancer agents is therefore an attractive therapeutic strategy. BRCA2 is involved in homologous recombination repair. BRCA2 defects increase cancer risk but, paradoxically, cancer patients with BRCA2 mutations have better survival rates. We queried TCGA data and found that BRCA2 alterations led to increased survival in patients with ovarian and endometrial cancer. We developed a BRCA2-targeting second-generation antisense oligonucleotide (ASO), which sensitized human lung, ovarian, and breast cancer cells to cisplatin by as much as 60%. BRCA2 ASO treatment overcame acquired cisplatin resistance in head and neck cancer cells, but induced minimal cisplatin sensitivity in non-tumor cells. BRCA2 ASO plus cisplatin reduced respiration as an early event preceding cell death, concurrent with increased glucose uptake without a difference in glycolysis. BRCA2 ASO and cisplatin decreased metastatic frequency in vivo by 77%. These results implicate BRCA2 as a regulator of metastatic frequency and cellular metabolic response following cisplatin treatment. BRCA2 ASO, in combination with cisplatin, is a potential therapeutic anti-cancer agent.
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38
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Lou X, Zhang J, Liu S, Xu N, Liao DJ. The other side of the coin: the tumor-suppressive aspect of oncogenes and the oncogenic aspect of tumor-suppressive genes, such as those along the CCND-CDK4/6-RB axis. Cell Cycle 2014; 13:1677-93. [PMID: 24799665 DOI: 10.4161/cc.29082] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Although cancer-regulatory genes are dichotomized to oncogenes and tumor-suppressor gene s, in reality they can be oncogenic in one situation but tumor-suppressive in another. This dual-function nature, which sometimes hampers our understanding of tumor biology, has several manifestations: (1) Most canonically defined genes have multiple mRNAs, regulatory RNAs, protein isoforms, and posttranslational modifications; (2) Genes may interact at different levels, such as by forming chimeric RNAs or by forming different protein complexes; (3) Increased levels of tumor-suppressive genes in normal cells drive proliferation of cancer progenitor cells in the same organ or tissue by imposing compensatory proliferation pressure, which presents the dual-function nature as a cell-cell interaction. All these manifestations of dual functions can find examples in the genes along the CCND-CDK4/6-RB axis. The dual-function nature also underlies the heterogeneity of cancer cells. Gene-targeting chemotherapies, including that targets CDK4, are effective to some cancer cells but in the meantime may promote growth or progression of some others in the same patient. Redefining "gene" by considering each mRNA, regulatory RNA, protein isoform, and posttranslational modification from the same genomic locus as a "gene" may help in better understanding tumor biology and better selecting targets for different sub-populations of cancer cells in individual patients for personalized therapy.
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Affiliation(s)
- Xiaomin Lou
- CAS Key Laboratory of Genome Sciences and Information; Beijing Institute of Genomics; Chinese Academy of Sciences; Beijing, PR China
| | - Ju Zhang
- CAS Key Laboratory of Genome Sciences and Information; Beijing Institute of Genomics; Chinese Academy of Sciences; Beijing, PR China
| | - Siqi Liu
- CAS Key Laboratory of Genome Sciences and Information; Beijing Institute of Genomics; Chinese Academy of Sciences; Beijing, PR China
| | - Ningzhi Xu
- Laboratory of Cell and Molecular Biology; Cancer Institute; Chinese Academy of Medical Science; Beijing, PR China
| | - D Joshua Liao
- Hormel Institute; University of Minnesota; Austin, MN USA
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Cotterell J. Exome sequencing reveals a potential mutational trajectory and treatments for a specific pancreatic cancer patient. Onco Targets Ther 2014; 7:655-62. [PMID: 24833909 PMCID: PMC4014375 DOI: 10.2147/ott.s45232] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Pancreatic cancer is the fourth biggest killer, and has one of the worst prognoses, of any cancer type. Approximately 95% of patients diagnosed with pancreatic cancer will not survive beyond 5 years post diagnosis, and these statistics have barely improved in over 40 years. Here, genomic changes in one particular patient with stage IV metastatic pancreatic cancer were explored to suggest a potential personalized treatment. In particular, exome sequencing of genomic DNA extracted from blood and the cancer biopsy was utilized with the aim of identifying mutational drivers of the cancer. This analysis revealed a splice site mutation in RBCK1 as the most promising driver of the cancer and a therapy based on a pan-cyclin-dependent kinase (pan-CDK) inhibitor, flavopiridol. This study suggests that drugs whose effectiveness is unclear for general populations of cancer sufferers should possibly be reconsidered for specific patients where the drug could be rationally argued to improve outcome.
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Affiliation(s)
- James Cotterell
- Center for Genomic Regulation, Barcelona, Spain ; Garvan Institute for Medical Research, Sydney, NSW, Australia
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40
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Blair BG, Bardelli A, Park BH. Somatic alterations as the basis for resistance to targeted therapies. J Pathol 2014; 232:244-54. [PMID: 24114654 DOI: 10.1002/path.4278] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Revised: 08/23/2013] [Accepted: 09/21/2013] [Indexed: 12/20/2022]
Abstract
Recent advances in genetics and genomics have revealed new genes and pathways that are somatically altered in human malignancies. This wealth of knowledge has translated into molecularly defined targets for therapy over the past two decades, serving as key examples that translation of laboratory findings can have great impact on the ability to treat patients with cancer. However, given the genetic instability and heterogeneity that are characteristic of all human cancers, drug resistance to virtually all therapies has emerged, posing further and future challenges for clinical oncology. Here we review the history of targeted therapies, including examples of genetically defined cancer targets and their approved therapies. We also discuss resistance mechanisms that have been uncovered, with an emphasis on somatic genetic alterations that lead to these phenotypes.
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Affiliation(s)
- Brian G Blair
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
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41
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Pierce A, McGowan PM, Cotter M, Mullooly M, O'Donovan N, Rani S, O'Driscoll L, Crown J, Duffy MJ. Comparative antiproliferative effects of iniparib and olaparib on a panel of triple-negative and non-triple-negative breast cancer cell lines. Cancer Biol Ther 2014; 14:537-45. [PMID: 23760496 DOI: 10.4161/cbt.24349] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
PARP inhibitors, both as monotherapy and in combination with cytotoxic drugs, are currently undergoing clinical trials in several different cancer types. In this investigation, we compared the antiproliferative activity of two PARP/putative PARP inhibitors, i.e., olaparib and iniparib, in a panel of 14 breast cancer cell lines (seven tripe-negative and seven non-triple-negative). In almost all cell lines investigated, olaparib was a more potent inhibitor of cell growth than iniparib. Inhibition by both drugs was cell line-dependent and independent of the molecular subtype status of the cells, i.e., whether cells were triple-negative or non-triple negative. Although the primary target of PARP inhibitors is PARP1, no significant association was found between baseline levels of PARP1 activity and inhibition with either agent. Similarly, no significant correlation was evident between sensitivity and levels of CDK1, BRCA1 or miR-182. Combined addition of olaparib and either the CDK1 inhibitor, RO-3306 or a pan HER inhibitor (neratinib, afatinib) resulted in superior growth inhibition to that obtained with olaparib alone. We conclude that olaparib, in contrast to iniparib, is a strong inhibitor of breast cancer cell growth and may have efficacy in breast cancer irrespective of its molecular subtype, i.e., whether HER2-positive, estrogen receptor (ER)-positive or triple-negative. Olaparib, in combination with a selective CDK1 inhibitor or a pan HER inhibitor, is a potential new approach for treating breast cancer.
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Affiliation(s)
- Aisling Pierce
- Education and Research Centre, St. Vincent's University Hospital, Dublin, Ireland
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42
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Westin SN, Herzog TJ, Coleman RL. Investigational agents in development for the treatment of ovarian cancer. Invest New Drugs 2013; 31:213-29. [PMID: 22661305 PMCID: PMC4103697 DOI: 10.1007/s10637-012-9837-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 05/17/2012] [Indexed: 12/16/2022]
Abstract
Although significant success has been achieved in the treatment of advanced and recurrent ovarian cancer, there is clearly room for improvement. The use of targeted agents in this patient population has the promise to provide improved survival and quality of life. There are a myriad of relevant pathways under exploration in all settings of ovarian cancer. Clinical trial data are accumulating for antiangiogenic therapy, including vascular endothelial growth factor (VEGF)-specific inhibitors and multiple angiogenic signaling target inhibitors, as well as poly-ADP-ribose polymerase (PARP) inhibitors. Other types of tumorigenic pathway inhibitors, including those that target phosphatidylinositol-3-kinase (PI3K), mammalian target of rapamycin (mTOR), protein kinase B (AKT), Src, folate receptor alpha, and insulin-like growth factor-1 receptor (IGF-1R) pathways are in earlier phases of development for ovarian cancer. Attempts to target the epidermal growth factor receptor (EGFR) of ovarian tumors have been met with limited success; however, newer agents that inhibit this pathway show promise. Finally, with recognition of the role of Wee-1 in p53-deficient tumors, an inhibitor of this tyrosine kinase is being evaluated in recurrent ovarian cancer. The logistical challenge is to determine the optimal timing and proper combinations of novel agents independently as well as concomitantly with conventional chemotherapeutics. Reported results have been modest; however, our growing understanding of these pathways will be potentially reflected in greater impact on response and survival.
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Affiliation(s)
- Shannon N Westin
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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43
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Malecki M, Dahlke J, Haig M, Wohlwend L, Malecki R. Eradication of Human Ovarian Cancer Cells by Transgenic Expression of Recombinant DNASE1, DNASE1L3, DNASE2, and DFFB Controlled by EGFR Promoter: Novel Strategy for Targeted Therapy of Cancer. ACTA ACUST UNITED AC 2013; 4:152. [PMID: 24587967 PMCID: PMC3938193 DOI: 10.4172/2157-7412.1000152] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Introduction Ovarian cancer is the most deadly among all gynecological cancers. Patients undergoing systemic therapies of advanced ovarian cancers suffer from horrendous side effects. Cancer survivors and their offspring suffer from iatrogenic consequences of systemic therapies: genetic mutations. The ultimate goal of our work is development of therapies, which selectively and completely eliminate cancer cells, but do not harm healthy cells. An important consideration for attaining this goal is the fact that ovarian cancer cells over-express EGFR or its mutants, what becomes the factor discriminating them from healthy cells - a potential facilitator of personalized therapy. Specific aim The specific aim of this project was threefold: (1) to bioengineer suicide genes’ carrying vectors guided by synthetic antibodies for EGFRvIII and EGFR; (2) to genetically engineer DNA constructs for the human, recombinant DNASE1, DNASE1L3, DNASE2, and DFFB controlled by the EGFR promoter; (3) to selectively eradicate ovarian cancer cells by intranuclear targeting of the transgenically expressed recombinant DNases. Methods Synthetic antibodies for EGFR and EGFRvIII were selected from the human library and used to bioengineer biotag-guided transgenes’ vectors. Coding sequences for the human DNASE1, DNASE1L3, DNASE2, DFFB controlled by the EGFR promoter were amplified from the human cDNA and genetically engineered into the plasmid constructs also coding for the fusions with NLS and GFP. The vectors carrying transgenes for the DNases were delivered in vitro into human ovarian cancer cells from ascites and cultures. Results Synthetic antibody guided vectors delivered the transgenes for the recombinant DNases efficiently into the ovarian cancer cells. Transgenic expression and nuclear targeting of the DNases in those cells resulted in destruction of their genomes and led to their death, as validated by labeling with the molecular death tags. In healthy cells, which did not over-express EGFR, no changes were recorded. Conclusion Targeted expression of the recombinant DNASE1, DNASE1L3, DNASE2, DFFB in the ovarian cancers in vitro resulted in their complete eradication, but had no effects upon the healthy cells. This novel therapeutic strategy has a potential for streamlining it into in vivo trials, as personalized, targeted therapy of ovarian and other cancers.
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Affiliation(s)
- Marek Malecki
- PBMEF, San Francisco, CA 94105, USA ; NMRFM, NIH, Madison, WI 53706, USA ; UW, Madison, WI 53706, USA
| | | | | | | | - Raf Malecki
- PBMEF, San Francisco, CA 94105, USA ; SFSU, San Francisco, CA 94132, USA
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MacConaill LE, Van Hummelen P, Meyerson M, Hahn WC. Clinical implementation of comprehensive strategies to characterize cancer genomes: opportunities and challenges. Cancer Discov 2012; 1:297-311. [PMID: 21935500 DOI: 10.1158/2159-8290.cd-11-0110] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An increasing number of anticancer therapeutic agents target specific mutant proteins that are expressed by many different tumor types. Recent evidence suggests that the selection of patients whose tumors harbor specific genetic alterations identifies the subset of patients who are most likely to benefit from the use of such agents. As the number of genetic alterations that provide diagnostic and/or therapeutic information increases, the comprehensive characterization of cancer genomes will be necessary to understand the spectrum of distinct genomic alterations in cancer, to identify patients who are likely to respond to particular therapies, and to facilitate the selection of treatment modalities. Rapid developments in new technologies for genomic analysis now provide the means to perform comprehensive analyses of cancer genomes. In this article, we review the current state of cancer genome analysis and discuss the challenges and opportunities necessary to implement these technologies in a clinical setting.
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Affiliation(s)
- Laura E MacConaill
- Center for Cancer Genome Discovery, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts 02215, USA
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45
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Bayraktar S, Rocha Lima CM. Emerging cell-cycle inhibitors for pancreatic cancer therapy. Expert Opin Emerg Drugs 2012; 17:571-82. [DOI: 10.1517/14728214.2012.739606] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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46
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BRCA1 and HSP90 cooperate in homologous and non-homologous DNA double-strand-break repair and G2/M checkpoint activation. Proc Natl Acad Sci U S A 2012; 109:13650-5. [PMID: 22869732 DOI: 10.1073/pnas.1203326109] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Expression of functional breast cancer susceptibility gene 1 (BRCA1) in human breast and ovarian cancers is associated with resistance to platinum-based chemotherapeutics and poly(ADP ribose) polymerase (PARP) inhibitors. BRCA1 is a nuclear tumor suppressor that is critical for resolving double-strand DNA breaks (DSBs) and interstrand crosslinks (ICLs) by homologous recombination (HR). In vitro, animal and human clinical data have demonstrated that BRCA1-deficient cancers are highly sensitive to ICL-inducing chemotherapeutic agents, are amenable to synthetic lethal approaches that exploit defects in DSB/ICL repair, and may be associated with improved survival. Conversely, high or restored expression of BRCA1 in breast and ovarian cancer is associated with therapeutic resistance and poor prognosis. There has been much interest in identifying agents that interfere with BRCA1-dependent DSB/ICL repair to restore or enhance sensitivity to cancer therapeutics. We demonstrate that the heat-shock protein 90 (HSP90) inhibitor 17-allylamino-17-demethoxygeldanamycin [17-AAG (Tanespimycin)], currently in Phase II/III clinical evaluation for several cancers, induces BRCA1 ubiquitination and proteasomal degradation, resulting in compromised repair of ionizing radiation- and platinum-induced DNA damage. We show that loss of HSP90 function abolishes BRCA1-dependent DSB repair and that BRCA1-deficient cells are hypersensitive to 17-AAG due to impaired Gap 2/Mitosis (G2/M) checkpoint activation and resultant mitotic catastrophe. In summary, we document an upstream HSP90-dependent regulatory point in the Fanconi anemia/BRCA DSB/ICL repair pathway, illuminate the role of BRCA1 in regulating damage-associated checkpoint and repair responses to HSP90 inhibitors, and identify BRCA1 as a clinically relevant target for enhancing sensitivity in refractory and/or resistant malignancies.
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Duffy MJ, McGowan PM, Crown J. Targeted therapy for triple-negative breast cancer: where are we? Int J Cancer 2012; 131:2471-7. [PMID: 22581656 DOI: 10.1002/ijc.27632] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 04/05/2012] [Indexed: 12/29/2022]
Abstract
Breast cancers that are negative for estrogen receptor (ER), progesterone receptors (PR) and HER2, using standard clinical assays, have been dubbed triple-negative (TN). Unlike other molecular subtypes of invasive breast cancer, validated targeted therapies are currently unavailable for patients with TN breast cancer. Preclinical studies however, have identified several potential targets such as epidermal growth factor receptor (EGFR), SRC, MET and poly ADP ribose polymerase 1/2 (PARP1/2). Because of tumor heterogeneity, it is unlikely that any single targeted therapy will be efficacious in all patients with TN breast cancer. The rational way forward for treating these patients is likely to be biomarker-driven, combination targeted therapies or combination of targeted therapy with cytotoxic chemotherapy.
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Affiliation(s)
- Michael J Duffy
- UCD Clinical Research Centre, St. Vincent's University Hospital, Dublin, Ireland.
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48
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Wang Z, Wang F, Tang T, Guo C. The role of PARP1 in the DNA damage response and its application in tumor therapy. Front Med 2012; 6:156-64. [PMID: 22660976 DOI: 10.1007/s11684-012-0197-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 03/14/2012] [Indexed: 11/28/2022]
Abstract
Single-strand break repair protein poly(ADP-ribose) polymerase 1 (PARP1) catalyzes the poly(ADP-ribosyl)ation of many key proteins in vivo and thus plays important roles in multiple DNA damage response pathways, rendering it a promising target in cancer therapy. The tumor-suppressor effects of PARP inhibitors have attracted significant interest for development of novel cancer therapies. However, recent evidence indicated that the underlying mechanism of PARP inhibitors in tumor therapy is more complex than previously expected. The present review will focus on recent progress on the role of PARP1 in the DNA damage response and PARP inhibitors in cancer therapy. The emerging resistance of BRCA-deficient tumors to PARP inhibitors is also briefly discussed from the perspective of DNA damage and repair. These recent research advances will inform the selection of patient populations who can benefit from the PARP inhibitor treatment and development of effective drug combination strategies.
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Affiliation(s)
- Zhifeng Wang
- Laboratory of Disease Genomics and Individual Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100029, China
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49
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Wahlberg E, Karlberg T, Kouznetsova E, Markova N, Macchiarulo A, Thorsell AG, Pol E, Frostell Å, Ekblad T, Öncü D, Kull B, Robertson GM, Pellicciari R, Schüler H, Weigelt J. Family-wide chemical profiling and structural analysis of PARP and tankyrase inhibitors. Nat Biotechnol 2012; 30:283-8. [PMID: 22343925 DOI: 10.1038/nbt.2121] [Citation(s) in RCA: 375] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 01/13/2012] [Indexed: 02/08/2023]
Abstract
Inhibitors of poly-ADP-ribose polymerase (PARP) family proteins are currently in clinical trials as cancer therapeutics, yet the specificity of many of these compounds is unknown. Here we evaluated a series of 185 small-molecule inhibitors, including research reagents and compounds being tested clinically, for the ability to bind to the catalytic domains of 13 of the 17 human PARP family members including the tankyrases, TNKS1 and TNKS2. Many of the best-known inhibitors, including TIQ-A, 6(5H)-phenanthridinone, olaparib, ABT-888 and rucaparib, bound to several PARP family members, suggesting that these molecules lack specificity and have promiscuous inhibitory activity. We also determined X-ray crystal structures for five TNKS2 ligand complexes and four PARP14 ligand complexes. In addition to showing that the majority of PARP inhibitors bind multiple targets, these results provide insight into the design of new inhibitors.
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Affiliation(s)
- Elisabet Wahlberg
- Structural Genomics Consortium, Karolinska Institutet, Department of Medical Biochemistry and Biophysics, Stockholm, Sweden
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50
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Hiss D. Optimizing molecular-targeted therapies in ovarian cancer: the renewed surge of interest in ovarian cancer biomarkers and cell signaling pathways. JOURNAL OF ONCOLOGY 2012; 2012:737981. [PMID: 22481932 PMCID: PMC3306947 DOI: 10.1155/2012/737981] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 11/24/2011] [Indexed: 12/18/2022]
Abstract
The hallmarks of ovarian cancer encompass the development of resistance, disease recurrence and poor prognosis. Ovarian cancer cells express gene signatures which pose significant challenges for cancer drug development, therapeutics, prevention and management. Despite enhancements in contemporary tumor debulking surgery, tentative combination regimens and abdominal radiation which can achieve beneficial response rates, the majority of ovarian cancer patients not only experience adverse effects, but also eventually relapse. Therefore, additional therapeutic possibilities need to be explored to minimize adverse events and prolong progression-free and overall response rates in ovarian cancer patients. Currently, a revival in cancer drug discovery is devoted to identifying diagnostic and prognostic ovarian cancer biomarkers. However, the sensitivity and reliability of such biomarkers may be complicated by mutations in the BRCA1 or BRCA2 genes, diverse genetic risk factors, unidentified initiation and progression elements, molecular tumor heterogeneity and disease staging. There is thus a dire need to expand existing ovarian cancer therapies with broad-spectrum and individualized molecular targeted approaches. The aim of this review is to profile recent developments in our understanding of the interrelationships among selected ovarian tumor biomarkers, heterogeneous expression signatures and related molecular signal transduction pathways, and their translation into more efficacious targeted treatment rationales.
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Affiliation(s)
- Donavon Hiss
- Molecular Oncology Research Laboratory, Department of Medical BioSciences, University of the Western Cape, Bellville 7535, South Africa
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