1
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Li T, Lu W, Tian H, Cao Y, He Q, Chen X, Wang H. Identification and Characterization of DNA-Oxaliplatin Adducts through α-hemolysin Nanopores. Anal Chem 2023; 95:11201-11210. [PMID: 37417945 DOI: 10.1021/acs.analchem.3c00461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
The antitumor effect of Pt-based drugs is determined by their binding activity with deoxyribonucleic acid (DNA), and understanding the reaction process in a systematic manner is crucial. However, existing assays used for DNA-Pt research suffer from several issues, such as complicated sample preparation, preamplification, and expensive instruments, which dramatically limit their practical application. In this study, a novel method was presented to investigate the adducts of DNA and oxaliplatin using an α-hemolysin nanopore sensor. This approach allows for real-time monitoring of the DNA-oxaliplatin condensation process through the detection of nanopore events associated with DNA-oxaliplatin adducts. Specifically, type I and II signals exhibiting specific current characteristics were observed during the process. Typical signals with high frequency were obtained by recording the designed DNA sequence. Furthermore, the production of these signals was confirmed to be independent of homologous adducts. This finding suggests that the DNA-oxaliplatin adduct can serve as a potential sensor for detecting oxaliplatin lesions and multiple types of molecules.
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Affiliation(s)
- Ting Li
- College of Life Science & Biotechnology, Mianyang Normal University, Mianyang 621000, China
| | - Wei Lu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Hui Tian
- College of Life Science & Biotechnology, Mianyang Normal University, Mianyang 621000, China
| | - Yu Cao
- College of Life Science & Biotechnology, Mianyang Normal University, Mianyang 621000, China
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Qianqian He
- College of Life Science & Biotechnology, Mianyang Normal University, Mianyang 621000, China
| | - Xia Chen
- College of Life Science & Biotechnology, Mianyang Normal University, Mianyang 621000, China
- China Academy of Engineering Physics, Institute of Nuclear Physics and Chemistry, Mianyang 621000, China
| | - Hailong Wang
- China Academy of Engineering Physics, Institute of Nuclear Physics and Chemistry, Mianyang 621000, China
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2
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Wang Y, Jiang B, Luo W. Memantine ameliorates oxaliplatin-induced neurotoxicity via mitochondrial protection. Bioengineered 2022; 13:6688-6697. [PMID: 35235756 PMCID: PMC8974112 DOI: 10.1080/21655979.2022.2026553] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Oxaliplatin is an effective chemotherapeutic agent for the treatment of malignant tumors. However, severe oxaliplatin-induced neurotoxicity has been well documented. Memantine is a drug for the management of Alzheimer's Disease (AD) due to its promising neuroprotective properties. We hypothesize that Memantine possesses a beneficial role against chemotherapy-induced neuronal damages. In this study, we established an oxaliplatin-induced neurotoxicity assay model in human SHSY-5Y neuronal cells and investigated the protective effect of Memantine. We showed that Memantine treatment ameliorated oxaliplatin-elevated intracellular production of reactive oxygen species (ROS), lipid product malondialdehyde (MDA), and NOX-2 expression. Memantine alleviated impairment of the mitochondrial membrane potential and ATP production by oxaliplatin. As a result, Memantine showed a protective role against oxaliplatin-induced cytotoxicity. Moreover, the terminal deoxynucleotidyl Transferase-mediated dUTP nick end labeling (TUNEL) apoptosis assay revealed that Memantine protected oxaliplatin-induced apoptosis through mitigating the ratio of Bax/Bcl-2 and Caspase-3 cleavage. We concluded Memantine ameliorated the neurotoxicity of oxaliplatin in a mitochondrial-dependent pathway.
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Affiliation(s)
- Youyu Wang
- Department of Thoracic Surgery, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, Guangdong, China
| | - Bo Jiang
- Department of Thoracic Surgery, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Wang Luo
- Departments of Respiratory Diseases, Zengcheng Branch of Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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3
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Epithelial Ovarian Cancer and Cancer Stem Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1330:21-32. [PMID: 34339028 DOI: 10.1007/978-3-030-73359-9_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Epithelial ovarian cancer is a lethal gynecological cancer. It is related to high mortality because the majority of the patients present in advanced stage and because of the high recurrence rates of the disease. Recurrent ovarian cancer is classified according to the time interval between the last platinum-based chemotherapy and the occurrence of recurrence, to platinum-sensitive and platinum-resistant. Many theories tried to explain development of resistance to platinum-based therapy. "Cancer stem cells" is one of these theories and is being currently under investigation by many groups. This chapter will demonstrate the suggested contribution of cancer stem cells to the development of recurrent ovarian cancer.
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4
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Moyano-Galceran L, Pietilä EA, Turunen SP, Corvigno S, Hjerpe E, Bulanova D, Joneborg U, Alkasalias T, Miki Y, Yashiro M, Chernenko A, Jukonen J, Singh M, Dahlstrand H, Carlson JW, Lehti K. Adaptive RSK-EphA2-GPRC5A signaling switch triggers chemotherapy resistance in ovarian cancer. EMBO Mol Med 2020; 12:e11177. [PMID: 32115889 PMCID: PMC7136956 DOI: 10.15252/emmm.201911177] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 12/20/2022] Open
Abstract
Metastatic cancers commonly activate adaptive chemotherapy resistance, attributed to both microenvironment‐dependent phenotypic plasticity and genetic characteristics of cancer cells. However, the contribution of chemotherapy itself to the non‐genetic resistance mechanisms was long neglected. Using high‐grade serous ovarian cancer (HGSC) patient material and cell lines, we describe here an unexpectedly robust cisplatin and carboplatin chemotherapy‐induced ERK1/2‐RSK1/2‐EphA2‐GPRC5A signaling switch associated with cancer cell intrinsic and acquired chemoresistance. Mechanistically, pharmacological inhibition or knockdown of RSK1/2 prevented oncogenic EphA2‐S897 phosphorylation and EphA2‐GPRC5A co‐regulation, thereby facilitating a signaling shift to the canonical tumor‐suppressive tyrosine phosphorylation and consequent downregulation of EphA2. In combination with platinum, RSK inhibitors effectively sensitized even the most platinum‐resistant EphA2high, GPRC5Ahigh cells to the therapy‐induced apoptosis. In HGSC patient tumors, this orphan receptor GPRC5A was expressed exclusively in cancer cells and associated with chemotherapy resistance and poor survival. Our results reveal a kinase signaling pathway uniquely activated by platinum to elicit adaptive resistance. They further identify GPRC5A as a marker for abysmal HGSC outcome and putative vulnerability of the chemo‐resistant cells to RSK1/2‐EphA2‐pS897 pathway inhibition.
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Affiliation(s)
- Lidia Moyano-Galceran
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Elina A Pietilä
- Research Programs Unit, Individualized Drug Therapy, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - S Pauliina Turunen
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Sara Corvigno
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden.,Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Elisabet Hjerpe
- Department of Obstetrics and Gynecology, Visby Hospital, Visby, Sweden
| | - Daria Bulanova
- Institute for Molecular Medicine Finland, FIMM, University of Helsinki, Helsinki, Finland
| | - Ulrika Joneborg
- Division of Pelvic Cancer, Department of Women's and Children's Health, Karolinska Institutet and University Hospital, Stockholm, Sweden
| | - Twana Alkasalias
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Research Centre, Salahaddin University-Erbil, Erbil, Iraq
| | - Yuichiro Miki
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Masakazu Yashiro
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Anastasiya Chernenko
- Research Programs Unit, Individualized Drug Therapy, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Joonas Jukonen
- Research Programs Unit, Individualized Drug Therapy, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Madhurendra Singh
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Hanna Dahlstrand
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden.,Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Joseph W Carlson
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Kaisa Lehti
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Research Programs Unit, Individualized Drug Therapy, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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5
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Li Y, Meng F, Chen Z, Han F, He D, Hao Y, Gao A, Jiang J, Wang Z, Liu W, Liu Q. Pharmacokinetics and tissue distribution in rats of a novel anticancer platinum compound LLC-1903. Xenobiotica 2020; 50:980-987. [PMID: 32072840 DOI: 10.1080/00498254.2020.1728421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
LLC-1903, a novel anticancer compound, was synthesized by optimizing the structure, which was derived from altering the leaving group of lobaplatin. It has an excellent in vitro anti-cancer activity, high water solubility, high stability in solution and low in vivo toxicity according to our former study.The plasma pharmacokinetics (PK) and tissue distribution of LLC-1903 and lobaplatin in rats were determined after intravenous administration of a single dose (0.06 mmol/kg body weight). Inductively coupled plasma mass spectrometry (ICP-MS) was used to measure the concentration of platinum (Pt) in plasma and tissue samples.Most PK parameters of the Pt in LLC-1903 showed a significant difference from those of lobaplatin. The plasma level of LLC-1903 is only half of that of lobaplatin (p < 0.01) which could be the direct result of faster drug clearance. The tissue distribution showed that both LLC-1903 and lobaplatin were mainly found in the liver and kidney, and less in other organs. At four time points (0.083, 0.5, 1 and 4 h) after administration, the tissue concentrations of LLC-1903 were almost always significantly higher than those of lobaplatin (p < 0.05 or p < 0.01).
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Affiliation(s)
- Yingxue Li
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Fanzhuo Meng
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Zhijian Chen
- Department of Oncology, Guangdong Hospital of Traditional Chinese Medicine, Guangzhou, China
| | - Fuguo Han
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Donglin He
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Yanli Hao
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Anli Gao
- Kunming Institute of Precious Metals, Kunming, China
| | - Jing Jiang
- Kunming Institute of Precious Metals, Kunming, China
| | - Zhao Wang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Weiping Liu
- Kunming Institute of Precious Metals, Kunming, China
| | - Qingfei Liu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
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6
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Allantoin reduces cell death induced by cisplatin: possible implications for tumor lysis syndrome management. J Biol Inorg Chem 2019; 24:547-562. [PMID: 31030325 DOI: 10.1007/s00775-019-01661-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 04/23/2019] [Indexed: 12/13/2022]
Abstract
Massive lysis of tumor mass in cancer patients under chemotherapy regimens generates high levels of uric acid, leading to what is known as tumor lysis syndrome (TLS). Rasburicase, a recombinant urate oxidase, converts urate to allantoin, which is readily excreted by the kidneys. Even though there is a high production of allantoin from urate in cancer patients following rasburicase treatment, there are no studies on how allantoin excess could interfere with chemotherapy. We have evaluated allantoin interference with cisplatin efficiency on the lung cancer cell line H460 in vitro. The cells were treated with cisplatin (33 µM), with or without allantoin, for 48 h, in the presence or absence of UV light, and N-acetyl-L-cysteine (NAC) for 24 h. Cell viability, cell cycle, ROS production, apoptosis and immunoblot assays were performed. We showed that allantoin reduced the apoptosis induced by cisplatin in the H460 cell line. However, the activity of carboplatin and oxaliplatin, betulinic acid, TIBA, UV and H2O2 was not affected by allantoin. NMR spectroscopy showed that allantoin reduces cisplatin activity through direct interaction with cisplatin.
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7
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PARP inhibition in platinum-based chemotherapy: Chemopotentiation and neuroprotection. Pharmacol Res 2018; 137:104-113. [PMID: 30278221 DOI: 10.1016/j.phrs.2018.09.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 09/25/2018] [Accepted: 09/28/2018] [Indexed: 01/01/2023]
Abstract
Cisplatin, carboplatin and oxaliplatin represent the backbone of platinum therapy for several malignancies including head and neck, lung, colorectal, ovarian, breast, and genitourinary cancer. However, the efficacy of platinum-based drugs is often compromised by a plethora of severe toxicities including sensory and enteric neuropathy. Acute and chronic neurotoxicity following platinum chemotherapy is a major constraint, contributing to dose-reductions, treatment delays, and cessation of treatment. Identifying drugs that effectively prevent these toxic complications is imperative to improve the efficacy of anti-cancer treatment and patient quality of life. Oxidative stress and mitochondrial dysfunction have been highlighted as key players in the pathophysiology of platinum chemotherapy-induced neuropathy. Inhibition of poly(ADP-ribose) polymerase (PARP), a nuclear enzyme activated upon DNA damage, has demonstrated substantial sensory and enteric neuroprotective capacity when administered in combination with platinum chemotherapeutics. Furthermore, administration of PARP inhibitors alongside platinum chemotherapy has been found to significantly improve progression-free survival in patients with breast and ovarian cancer when compared to those receiving chemotherapy alone. This review summarises the current knowledge surrounding mitochondrial damage and oxidative stress in platinum chemotherapy-induced neuropathy and highlights a potential role for PARP in chemopotentiation and neuroprotection.
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8
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McQuade RM, Stojanovska V, Stavely R, Timpani C, Petersen AC, Abalo R, Bornstein JC, Rybalka E, Nurgali K. Oxaliplatin-induced enteric neuronal loss and intestinal dysfunction is prevented by co-treatment with BGP-15. Br J Pharmacol 2018; 175:656-677. [PMID: 29194564 DOI: 10.1111/bph.14114] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 11/21/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND AND PURPOSE Gastrointestinal side effects of chemotherapy are an under-recognized clinical problem, leading to dose reduction, delays and cessation of treatment, presenting a constant challenge for efficient and tolerated anti-cancer treatment. We have found that oxaliplatin treatment results in intestinal dysfunction, oxidative stress and loss of enteric neurons. BGP-15 is a novel cytoprotective compound with potential HSP72 co-inducing and PARP inhibiting properties. In this study, we investigated the potential of BGP-15 to alleviate oxaliplatin-induced enteric neuropathy and intestinal dysfunction. EXPERIMENTAL APPROACH Balb/c mice received oxaliplatin (3 mg·kg-1 ·day-1 ) with and without BGP-15 (15 mg·kg-1 ·day-1 : i.p.) tri-weekly for 14 days. Gastrointestinal transit was analysed via in vivo X-ray imaging, before and after treatment. Colons were collected to assess ex vivo motility, neuronal mitochondrial superoxide and cytochrome c levels and for immunohistochemical analysis of myenteric neurons. KEY RESULTS Oxaliplatin-induced neuronal loss increased the proportion of neuronal NO synthase-immunoreactive neurons and increased levels of mitochondrial superoxide and cytochrome c in the myenteric plexus. These changes were correlated with an increase in PARP-2 immunoreactivity in the colonic mucosa and were attenuated by BGP-15 co-treatment. Significant delays in gastrointestinal transit, intestinal emptying and pellet formation, impaired colonic motor activity, reduced faecal water content and lack of weight gain associated with oxaliplatin treatment were restored to sham levels in mice co-treated with BGP-15. CONCLUSION AND IMPLICATIONS Our results showed that BGP-15 ameliorated oxidative stress, increased enteric neuronal survival and alleviated oxaliplatin-induced intestinal dysfunction, suggesting that BGP-15 may relieve the gastrointestinal side effects of chemotherapy.
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Affiliation(s)
- Rachel M McQuade
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia
| | - Vanesa Stojanovska
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia
| | - Rhian Stavely
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia.,Department of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Regenerative Medicine and Stem Cells Program, Australian Institute for Musculoskeletal Science (AIMSS), Western Health, Melbourne, VIC, Australia
| | - Cara Timpani
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia.,Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, VIC, Australia.,Department of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Regenerative Medicine and Stem Cells Program, Australian Institute for Musculoskeletal Science (AIMSS), Western Health, Melbourne, VIC, Australia
| | - Aaron C Petersen
- Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, VIC, Australia.,Department of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Regenerative Medicine and Stem Cells Program, Australian Institute for Musculoskeletal Science (AIMSS), Western Health, Melbourne, VIC, Australia
| | - Raquel Abalo
- Área de Farmacología y Nutrición y Unidad Asociada al Instituto de Química Médica (IQM) y al Instituto de Investigación en Ciencias de la Alimentación (CIAL) del Consejo Superior de Investigaciones Científicas (CSIC); Grupo de Excelencia Investigadora URJC-Banco de Santander-Grupo Multidisciplinar de Investigación y Tratamiento del Dolor (i+DOL), Universidad Rey Juan Carlos, Alcorcón, Spain
| | - Joel C Bornstein
- Department of Physiology, Melbourne University, Melbourne, VIC, Australia
| | - Emma Rybalka
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia.,Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, VIC, Australia.,Department of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Regenerative Medicine and Stem Cells Program, Australian Institute for Musculoskeletal Science (AIMSS), Western Health, Melbourne, VIC, Australia
| | - Kulmira Nurgali
- College of Health and Biomedicine, Victoria University, Melbourne, VIC, Australia.,Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, VIC, Australia.,Department of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Regenerative Medicine and Stem Cells Program, Australian Institute for Musculoskeletal Science (AIMSS), Western Health, Melbourne, VIC, Australia
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9
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Wang SS, Zimmermann M, Zhang H, Lin TY, Malfatti M, Haack K, Turteltaub KW, Cimino GD, de Vere White R, Pan CX, Henderson PT. A diagnostic microdosing approach to investigate platinum sensitivity in non-small cell lung cancer. Int J Cancer 2017; 141:604-613. [PMID: 28437852 PMCID: PMC5497716 DOI: 10.1002/ijc.30747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 03/21/2017] [Indexed: 12/29/2022]
Abstract
The platinum-based drugs cisplatin, carboplatin and oxaliplatin are often used for chemotherapy, but drug resistance is common. The prediction of resistance to these drugs via genomics is a challenging problem since hundreds of genes are involved. A possible alternative is to use mass spectrometry to determine the propensity for cells to form drug-DNA adducts-the pharmacodynamic drug-target complex for this class of drugs. The feasibility of predictive diagnostic microdosing was assessed in non-small cell lung cancer (NSCLC) cell culture and a pilot clinical trial. Accelerator mass spectrometry (AMS) was used to quantify [14 C]carboplatin-DNA monoadduct levels in the cell lines induced by microdoses and therapeutic doses of carboplatin, followed by correlation with carboplatin IC50 values for each cell line. The adduct levels in cell culture experiments were linearly proportional to dose (R2 = 0.95, p < 0.0001) and correlated with IC50 across all cell lines for microdose and therapeutically relevant carboplatin concentrations (p = 0.02 and p = 0.01, respectively). A pilot microdosing clinical trial was conducted to define protocols and gather preliminary data. Plasma pharmacokinetics (PK) and [14 C]carboplatin-DNA adducts in white blood cells and tumor tissues from six NSCLC patients were quantified via AMS. The blood plasma half-life of [14 C]carboplatin administered as a microdose was consistent with the known PK of therapeutic dosing. The optimal [14 C]carboplatin formulation for the microdose was 107 dpm/kg of body weight and 1% of the therapeutic dose for the total mass of carboplatin. No microdose-associated toxicity was observed in the patients. Additional accruals are required to significantly correlate adduct levels with response.
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Affiliation(s)
- Si-Si Wang
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
| | - Maike Zimmermann
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
- Accelerated Medical Diagnostics Incorporated, Berkeley, CA
| | - Hongyong Zhang
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
| | - Tzu-yin Lin
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
| | | | - Kurt Haack
- Lawrence Livermore National Laboratory, Livermore, CA
| | | | | | | | - Chong-xian Pan
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
- Department of Urology, University of California Davis, Sacramento, CA
- VA Northern California Health Care System, Mather, CA
| | - Paul T. Henderson
- Department of Internal Medicine, Division of Hematology and Oncology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA
- Accelerated Medical Diagnostics Incorporated, Berkeley, CA
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10
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Topolski A, Rozmarynowska P, Maj M, Czajkowski R. Kinetics and mechanism of chloride substitution by thiourea, l-methionine, and glutathione in bimetallic [Pt2(6NNqui)Cl4] complex in water-DMF medium. Unusually slow reaction with thiourea. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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McQuade RM, Carbone SE, Stojanovska V, Rahman A, Gwynne RM, Robinson AM, Goodman CA, Bornstein JC, Nurgali K. Role of oxidative stress in oxaliplatin-induced enteric neuropathy and colonic dysmotility in mice. Br J Pharmacol 2016; 173:3502-3521. [PMID: 27714760 PMCID: PMC5120153 DOI: 10.1111/bph.13646] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 09/18/2016] [Accepted: 09/19/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND AND PURPOSE Oxaliplatin is a platinum-based chemotherapeutic drug used as a first-line therapy for colorectal cancer. However, its use is associated with severe gastrointestinal side-effects resulting in dose limitations and/or cessation of treatment. In this study, we tested whether oxidative stress, caused by chronic oxaliplatin treatment, induces enteric neuronal damage and colonic dysmotility. EXPERIMENTAL APPROACH Oxaliplatin (3 mg·kg-1 per day) was administered in vivo to Balb/c mice intraperitoneally three times a week. The distal colon was collected at day 14 of treatment. Immunohistochemistry was performed in wholemount preparations of submucosal and myenteric ganglia. Neuromuscular transmission was studied by intracellular electrophysiology. Circular muscle tone was studied by force transducers. Colon propulsive activity studied in organ bath experiments and faeces were collected to measure water content. KEY RESULTS Chronic in vivo oxaliplatin treatment resulted in increased formation of reactive oxygen species (O2 -), nitration of proteins, mitochondrial membrane depolarisation resulting in the release of cytochrome c, loss of neurons, increased inducible NOS expression and apoptosis in both the submucosal and myenteric plexuses of the colon. Oxaliplatin treatment enhanced NO-mediated inhibitory junction potentials and altered the response of circular muscles to the NO donor, sodium nitroprusside. It also reduced the frequency of colonic migrating motor complexes and decreased circular muscle tone, effects reversed by the NO synthase inhibitor, Nω-Nitro-L-arginine. CONCLUSION AND IMPLICATIONS Our study is the first to provide evidence that oxidative stress is a key player in enteric neuropathy and colonic dysmotility leading to symptoms of chronic constipation observed in oxaliplatin-treated mice.
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Affiliation(s)
- Rachel M McQuade
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Simona E Carbone
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Vanesa Stojanovska
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Ahmed Rahman
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Rachel M Gwynne
- Department of Physiology, Melbourne University, Melbourne, Australia
| | - Ainsley M Robinson
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Craig A Goodman
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Joel C Bornstein
- Department of Physiology, Melbourne University, Melbourne, Australia
| | - Kulmira Nurgali
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
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12
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He D, Yin S, Han F, Zhu J, Shi Y, Tong Z, Liu Q. Pharmacokinetics and tissue distribution of two novel isomerism anticancer platinum compounds. Drug Dev Ind Pharm 2016; 42:1792-9. [PMID: 27042965 DOI: 10.3109/03639045.2016.1173053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Donglin He
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Shuhui Yin
- The Second Military General Hospital of Chinese Republic People’s Liberation Army, Beijing, China
| | - Fuguo Han
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Jingjie Zhu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Yun Shi
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Zhiyuan Tong
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Qingfei Liu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
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13
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Structural and functional evaluation of interaction between mammalian ribosomal RNA with platinum-containing antineoplastic drugs. Toxicol Lett 2016; 242:47-52. [DOI: 10.1016/j.toxlet.2015.11.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 11/23/2015] [Accepted: 11/26/2015] [Indexed: 01/20/2023]
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HNF1β drives glutathione (GSH) synthesis underlying intrinsic carboplatin resistance of ovarian clear cell carcinoma (OCCC). Tumour Biol 2015; 37:4813-29. [PMID: 26520442 DOI: 10.1007/s13277-015-4290-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/19/2015] [Indexed: 12/22/2022] Open
Abstract
Chemoresistance to platinum-based antineoplastic agents is a consistent feature among ovarian carcinomas; however, whereas high-grade serous carcinoma (OSC) acquires resistance during chemotherapy, ovarian clear cell carcinoma (OCCC) is intrinsically resistant. The main objective of this study was to explore, in vitro and in vivo, if hepatocyte nuclear factor 1β (HNF1β) and glutaminolysis contribute for the resistance of OCCC to carboplatin through the intrinsically increased GSH bioavailability. To disclose the role of HNF1β, experiments were also performed in an OSC cell line, which does not express HNF1β. Metabolic profiles, GSH quantification, HNF1β, and γ-glutamylcysteine ligase catalytic subunit (GCLC) and modifier subunit (GCLM) expression, cell cycle, and death were assessed in ES2 cell line (OCCC) and OVCAR3 cell line (OSC); HNF1β knockdown was performed in ES2 and murine model of subcutaneous and peritoneal OCCC tumors was established to test buthionine sulphoxamine (BSO), as a sensitizer to carboplatin. Glutaminolysis is activated in ES2 and OVCAR3, though ES2 exclusively synthesizes amino acids and GSH. ES2 cells are more resistant to carboplatin than OVCAR3 and the abrogation of GSH production by BSO sensitizes ES2 to carboplatin. HNF1β regulates the expression of GCLC, but not GCLM, and consequently GSH production in ES2. In vivo, BSO prior to carboplatin reduces dramatically subcutaneous tumor size and GSH levels, as well as peritoneal dissemination. Our study discloses HNF1β as the mediator of intrinsic OCCC chemoresistance and sheds a light to re-explore a cancer adjuvant therapeutic approach using BSO to overcome the lack of efficient therapy in OCCC.
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Kim CY, Seo SH, An MS, Kim KH, Bae KB, Hwang JW, Kim JH, Kim BM, Kang MS, Oh MK, Hong KH. ERCC1 as a Predictive Marker for FOLFOX Chemotherapy in an Adjuvant Setting. Ann Coloproctol 2015; 31:92-7. [PMID: 26161376 PMCID: PMC4496459 DOI: 10.3393/ac.2015.31.3.92] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 06/18/2015] [Indexed: 12/22/2022] Open
Abstract
Purpose The purpose of this study was to identify the excision repair cross-complementation group 1 (ERCC1) as a predictive marker for FOLFOX adjuvant chemotherapy in stages II and III colon cancer patients. Methods A total of 166 high risk stages II and III colon cancer patients were retrospectively enrolled in this study, and data were collected prospectively. They underwent a curative resection followed by FOLFOX4 adjuvant chemotherapy. We analyzed ERCC1 expression in the primary colon tumor by using immunohistochemical staining. The oncological outcomes included the 5-year disease-free survival (DFS) rate. The DFS was analyzed by using the Kaplan-Meier method with the log-rank test. A Cox proportional hazard model was used for the prognostic analysis. Results ERCC1-positive expression was statistically significant in the older patients (P = 0.032). In the multivariate analysis, the prognostic factors for DFS were female sex (P = 0.016), N stage (P = 0.009), and postoperative carcinoembryonic antigen level (P = 0.001), but ERCC1 expression was not a statistically significant prognostic factor for DFS in the univariate analysis (P = 0.397). The 5-year DFS rate was not significantly associated with the ERCC1 expression in all patients (P = 0.396) or with stage III disease (P = 0.582). Conclusion We found that ERCC1 expression was not significantly correlated with the 5-year DFS as reflected by the oncologic outcomes in patients with high-risk stages II and III colon cancer treated with FOLFOX adjuvant chemotherapy.
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Affiliation(s)
- Chee Young Kim
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Sang Hyuk Seo
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Min Sung An
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Kwang Hee Kim
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Ki Beom Bae
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Jin Won Hwang
- Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Ji Hyun Kim
- Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Bo Mi Kim
- Department of Pathology, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Mi Seon Kang
- Department of Pathology, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Min Kyung Oh
- Clinical Trial Center in Pharmacology, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Kwan Hee Hong
- Department of Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
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Kinetics, mechanism and equilibrium studies on the substitution reactions of Pd(II) in reference to Pt(II) complexes with bio-molecules. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.016] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Vo V, Tanthmanatham O, Han H, Bhowmik PK, Spangelo BL. Synthesis of [PtCl2(4,4'-dialkoxy-2,2'-bipyridine)] complexes and their in vitro anticancer properties. Metallomics 2014; 5:973-87. [PMID: 23817622 DOI: 10.1039/c3mt00128h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of [Pt(II)Cl2(4,4'-dialkoxy-2,2'-bipyridine)] complexes of the general formula of [Pt(II)Cl2(4,4'-bis(RO)-2,2'-bipyridine)] (where R = -(CH2)n-1CH3, n = 2-6, 8) were synthesized and characterized using (1)H NMR, (13)C NMR spectroscopy, elemental analysis, mass spectroscopy, and differential scanning calorimetry measurements. The in vitro anti-proliferative activities of these compounds were evaluated against human cancer cell lines A549 (lung adenocarcinoma), DU145 (prostate carcinoma), MCF-7 (breast adenocarcinoma), and MDA-MB-435 (melanoma) using the MTS cell proliferation assay. Several Pt(II) coordination compounds were found to have greatly enhanced activity compared to cisplatin after a one hour treatment in all cell lines tested. A structure-activity relationship was observed, that is, the activity increases as the carbon chain length of the alkyl group increases. The activity was maximum when the carbon chain length reached four or five carbons and decreased with the longer carbon chain length. Fluorescence microscopy and flow cytometry data indicate that the main mode of cell death is through apoptosis with some necrotic responses.
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Affiliation(s)
- Van Vo
- Department of Chemistry, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Box 454003, Las Vegas, NV 89154-4003, USA
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“Turn off–on” fluorescent sensor for platinum drugs-DNA interactions based on quantum dots. Biosens Bioelectron 2014; 52:29-35. [DOI: 10.1016/j.bios.2013.08.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 08/18/2013] [Accepted: 08/19/2013] [Indexed: 01/11/2023]
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Simonin K, N'Diaye M, Lheureux S, Loussouarn C, Dutoit S, Briand M, Giffard F, Brotin E, Blanc-Fournier C, Poulain L. Platinum compounds sensitize ovarian carcinoma cells to ABT-737 by modulation of the Mcl-1/Noxa axis. Apoptosis 2014; 18:492-508. [PMID: 23344663 DOI: 10.1007/s10495-012-0799-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ovarian cancer is the leading cause of death from gynecological cancer. The anti-apoptotic protein Bcl-x(L) is frequently overexpressed in ovarian carcinoma which correlates with chemotherapy resistance. It has been demonstrated that Bcl-x(L) cooperates with another anti-apoptotic protein, Mcl-1, to protect ovarian cancer cells against apoptosis, and that their concomitant inhibition induces massive cell death. Here, we examined the interest of ABT-737, a potent BH3-mimetic molecule targeting Bcl-x(L), both alone and in combination with Mcl-1 modulators, in ovarian cancer cell lines. As a single agent, ABT-737 was ineffective at promoting cell death in the four cell lines we tested in vitro. However, the specific inhibition of Mcl-1 by siRNA dramatically increased the sensitivity of chemoresistant cells to ABT-737. Platinum compounds also sensitize to ABT-737 by dose-dependently decreasing Mcl-1 expression or by increasing the expression of pro-apoptotic BH3-only proteins Noxa and, to a lower extent, Bim. Furthermore, we demonstrated that Noxa accumulation was involved in apoptosis occurring in response to the combination of ABT-737 and platinum compounds, since cells were protected from apoptosis by its silencing. Moreover, the combination was also highly cytotoxic ex vivo in sliced SKOV3 tumor nodes. However we observed in these slices a strong basal expression of Noxa and apoptotic cell death in response to ABT-737 alone. Therefore, we have revealed that the modulation of the Mcl-1/Noxa axis by platinum compounds results in a strong sensitization of chemoresistant ovarian carcinoma cells to ABT-737, which could constitute a promising therapeutic in these cancers.
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Affiliation(s)
- Karin Simonin
- Unité Biologie et Thérapies Innovantes des Cancers Localement Agressifs (EA 4656, Université de Caen Basse-Normandie et SF 4206 ICORE), Centre de Lutte Contre le Cancer François Baclesse, 3 Avenue du Général Harris, BP 5026, 14076 Caen Cedex 05, France
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Becker JP, Weiss J, Theile D. Cisplatin, oxaliplatin, and carboplatin unequally inhibit in vitro mRNA translation. Toxicol Lett 2013; 225:43-7. [PMID: 24275384 DOI: 10.1016/j.toxlet.2013.11.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/04/2013] [Accepted: 11/14/2013] [Indexed: 10/26/2022]
Abstract
DNA is considered the preferential target of platinum containing cytostatics such as cisplatin, oxaliplatin, and carboplatin. Despite profound knowledge on the interaction between platinum drugs and DNA, there is little data on the interaction with mRNA and even less on the potential differences among these antineoplastic agents to inhibit protein synthesis. We therefore established an in vitro translation system using in vitro transcribed mRNA encoding green fluorescent protein (GFP) to evaluate the effects of exposure of GFP mRNA to 0-100 μM of cisplatin, oxaliplatin, or carboplatin. We additionally investigated the interaction between these drugs and mRNA through evaluation of crossing-points during quantitative real-time polymerase chain reactions. In contrast to oxaliplatin or carboplatin, 100 μM cisplatin significantly increased crossing-points by about 3 cycles (P<0.01) and profoundly attenuated translation of GFP mRNA (P<0.05). Oxaliplatin showed a trend to reduce GFP mRNA translation, whereas carboplatin entirely failed to influence it. In conclusion, this study for the very first time documents different effects of platinum cytostatics on mRNA translation and demonstrates mRNA to be a functionally relevant target of at least cisplatin.
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Affiliation(s)
- Jonas Philipp Becker
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Johanna Weiss
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
| | - Dirk Theile
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
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Gao D, Hu J, Zhang X, Gao C, Hong J. Effect of hOGG1 over-expression on cisplatin resistance in esophageal squamous carcinoma cells. Cancer Biother Radiopharm 2013; 28:433-40. [PMID: 23806019 DOI: 10.1089/cbr.2012.1287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Human 8-oxoguanine DNA glycosylase (hOGG1) is an ubiquitous protein. It initiates the DNA base excision repair (BER) pathway to repair the 8-oxoguanine lesion. This may be associated with chemotherapeutics. In this article, the effect of hOGG1 over-expression on cisplatin resistance in esophageal squamous cell carcinoma (ESCC) EC9706 and ET13 cells was investigated. METHODS Recombinant adenovirus pAd/CMV/V5-DEST-hogg1 and control adenovirus pAd/CMV/5-GW/lacZ were constructed and transferred into EC9706 and ET13 cells, respectively. The protein expression and localization were determined by Western blot and by immunofluorescence assay. The cell growth viability was determined by 3-(4,5-dimethylthiazol-2yl)-2,5 diphe-nyltetrazolium bromide (MTT) assay and clonogenic survival assay. The apoptotic cells were detected by terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL) staining and flow cytometry. The oxidative DNA damage (8-Hydroxyguanine [8-oxoG] DNA level) was semi-quantified by immunohistochemistry assay. RESULTS The over-expression of hOGG1 protein was mainly in the nucleus in hOGG1 cells. After exposure to a common chemotherapeutic agent cisplatin, hOGG1 over-expression cells exhibited longer survival ability, lower cell apoptosis, and less 8-oxoG oxidative damage, compared with vector-treated cells and no-treated cells (p<0.05). CONCLUSION BER pathway to repair 8-oxoG lesion may be associated with ESCC sensitivity to cisplatin, and over-expression of hOGG1 in the nucleus can repair more 8-oxoG oxidative damage. The findings implied that over-expression of hOGG1 can protect ESCC cells from cisplatin-induced apoptosis and prolong cancer cell survival time. Modulation of DNA damage repair activity in the nucleus or in the mitochondria may lead to a different approach regarding cisplatin-induced resistance to chemotherapy.
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Affiliation(s)
- Daqing Gao
- School of Medicine, Southeast University, Nanjing, People's Republic of China.
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22
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P2X7 Cell Death Receptor Activation and Mitochondrial Impairment in Oxaliplatin-Induced Apoptosis and Neuronal Injury: Cellular Mechanisms and In Vivo Approach. PLoS One 2013; 8:e66830. [PMID: 23826152 PMCID: PMC3695015 DOI: 10.1371/journal.pone.0066830] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 05/10/2013] [Indexed: 12/25/2022] Open
Abstract
Limited information is available regarding the cellular mechanisms of oxaliplatin-induced painful neuropathy during exposure of patients to this drug. We therefore determined oxidative stress in cultured cells and evaluated its occurrence in C57BL/6 mice. Using both cultured neuroblastoma (SH-SY5Y) and macrophage (RAW 264.7) cell lines and also brain tissues of oxaliplatin-treated mice, we investigated whether oxaliplatin (OXA) induces oxidative stress and apoptosis. Cultured cells were treated with 2–200 µM OXA for 24 h. The effects of pharmacological inhibitors of oxidative stress or inflammation (N-acetyl cysteine, ibuprofen, acetaminophen) were also tested. Inhibitors were added 30 min before OXA treatment and then in combination with OXA for 24 h. In SH-SY5Y cells, OXA caused a significant dose-dependent decrease in viability, a large increase in ROS and NO production, lipid peroxidation and mitochondrial impairment as assessed by a drop in mitochondrial membrane potential, which are deleterious for the cell. An increase in levels of negatively charged phospholipids such as cardiolipin but also phosphatidylserine and phosphatidylinositol, was also observed. Additionally, OXA caused concentration-dependent P2X7 receptor activation, increased chromatin condensation and caspase-3 activation associated with TNF-α and IL-6 release. The majority of these toxic effects were equally observed in Raw 264.7 which also presented high levels of PGE2. Pretreatment of SH-SY5Y cells with pharmacological inhibitors significantly reduced or blocked all the neurotoxic OXA effects. In OXA-treated mice (28 mg/kg cumulated dose) significant cold hyperalgesia and oxidative stress in the tested brain areas were shown. Our study suggests that targeting P2X7 receptor activation and mitochondrial impairment might be a potential therapeutic strategy against OXA-induced neuropathic pain.
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Buac D, Schmitt S, Ventro G, Kona FR, Dou QP. Dithiocarbamate-based coordination compounds as potent proteasome inhibitors in human cancer cells. Mini Rev Med Chem 2013; 12:1193-201. [PMID: 22931591 DOI: 10.2174/138955712802762040] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/02/2012] [Accepted: 02/06/2012] [Indexed: 01/01/2023]
Abstract
Dithiocarbamates are a class of metal-chelating compounds with various applications in medicine. They have been used for the treatment of bacterial and fungal infections, possible treatment of AIDS, and most recently cancer. Their anti-tumor effects can in part be attributed to their ability to complex tumor cellular copper, leading to binding to and inhibition of the proteasome and in turn initiating tumor cell-specific apoptosis. Current chemotherapeutic agents are highly toxic and therefore their efficacy in the eradication of tumors is greatly limited. As a result many scientists have joined the quest for novel targeted therapies in hopes of reducing toxicity while maximizing potency and proteasome inhibition has become an attractive therapy in this regard. Here we discuss the origins, mechanism, and evolution of dithiocarbamates as potent proteasome inhibitors and therefore anti-cancer agents.
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Affiliation(s)
- Daniela Buac
- Departments of Oncology, Pharmacology and Pathology, and Developmental Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, 4100 John R Street Hudson Webber Cancer Research Center Room 516, Detroit, MI 48201, USA
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Li P, Fang YJ, Li F, Ou QJ, Chen G, Ma G. ERCC1, defective mismatch repair status as predictive biomarkers of survival for stage III colon cancer patients receiving oxaliplatin-based adjuvant chemotherapy. Br J Cancer 2013; 108:1238-44. [PMID: 23481186 PMCID: PMC3619275 DOI: 10.1038/bjc.2013.83] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background: Excision repair cross-complementation group 1 (ERCC1) expression status has been identified as a candidate marker for predicting efficacy of oxaliplatin (OX) treatment for metastatic colorectal cancer (CRC) in several trials. Also, an association between expression of mismatch repair (MMR) genes and favourable postoperative survival in stage II CRC receiving 5-FU chemotherapy has been identified. It is unknown if the expression of ERCC1 protein and MMR status are associated with survival of stage III colon cancer receiving OX-based chemotherapy. Methods: Immunohistochemistry (IHC) analysis of the expression of MMR and ERCC1 was performed on tumour tissue of 255 patients with stage III colon cancer. In all, 95 patients received fluoropyrimidine-based chemotherapy and 160 patients received OX-based chemotherapy. A predictive model for 5-year disease-free survival (DFS) and overall survival (OS) was constructed using Kaplan–Meier analysis, logistic and Cox regression. Results: Patients who were treated with OX-based therapy with positive ERCC1 tumours had lower 5-year DFS (54%) and OS (60%) than those with negative ERCC1 tumours (72% and 78%, respectively; DFS HR: 1.98, 95% confidence interval (CI): 1.19–3.31, P=0.009; OS HR: 2.44, 95% CI: 1.37–4.34, P=0.02). Excision repair cross-complementation group 1 status did not impact DFS or OS in fluorouracil group (DFS HR: 1.16, 95% CI: 0.63–2.14, P=0.62; OS HR: 1.16, 95% CI: 0.63–2.14, P=0.63), whereas MMR status had no impact on DFS or OS in either group. Conclusion: Excision repair cross-complementation group 1 status is highly predictive of which patients will benefit from the addition of OX to 5-FU for stage III colon cancer. Mismatch repair status had no predictive value in this setting.
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Affiliation(s)
- P Li
- Department of Colorectal Surgery, State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, China
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Abstract
The pyruvate mimetic 3-bromopyruvate (3-BP) is generally presented as an inhibitor of glycolysis and has shown remarkable efficacy in not only preventing tumor growth, but even eradicating existant tumors in animal studies. We here review reported molecular targets of 3-BP and suggest that the very range of possible targets, which pertain to the altered energy metabolism of tumor cells, contributes both to the efficacy and the tumor specificity of the drug. Its in vivo efficacy is suggested to be due to a combination of glycolytic and mitochondrial targets, as well as to secondary effects affecting the tumor microenvironment. The cytotoxicity of 3-BP is less due to pyruvate mimicry than to alkylation of, e.g., key thiols. Alkylation of DNA/RNA has not been reported. More research is warranted to better understand the pharmacokinetics of 3-BP, and its potential toxic effects to normal cells, in particular those that are highly ATP-/mitochondrion-dependent.
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Di Pasqua AJ, Goodisman J, Dabrowiak JC. Understanding how the platinum anticancer drug carboplatin works: From the bottle to the cell. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.01.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Namvaran-Abbas-Abad A, Tavakkoli F. Antinociceptive Effect of Salvia Extract on Cisplatin-Induced Hyperalgesia in Mice. NEUROPHYSIOLOGY+ 2012. [DOI: 10.1007/s11062-012-9249-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Theile D, Detering JC, Herold-Mende C, Dyckhoff G, Haefeli WE, Weiss J, Burhenne J. Cellular Pharmacokinetic/Pharmacodynamic Relationship of Platinum Cytostatics in Head and Neck Squamous Cell Carcinoma Evaluated by Liquid Chromatography Coupled to Tandem Mass Spectrometry. J Pharmacol Exp Ther 2011; 341:51-8. [DOI: 10.1124/jpet.111.189621] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Zayed A, Jones GDD, Reid HJ, Shoeib T, Taylor SE, Thomas AL, Wood JP, Sharp BL. Speciation of oxaliplatin adducts with DNA nucleotides. Metallomics 2011; 3:991-1000. [PMID: 21858382 DOI: 10.1039/c1mt00041a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This paper describes a set of fast and selective high performance liquid chromatography (HPLC) methods coupled to electro-spray ionisation linear ion trap mass spectrometry (ESI-MS), sector-field inductively coupled plasma mass spectrometry (SF-ICP-MS) and UV detection for in vitro studies of the bifunctional adducts of oxaliplatin with mono-nucleotides, di-nucleotides and cellular DNA. The stationary phases and the optimised conditions used for each separation are discussed. Interaction of oxaliplatin with A and G mono-nucleotides resulted in the formation of five bifunctional platinum diaminocyclohexane (DACHPt) adducts. These were two isomers of the A-DACHPt-A and A-DACHPt-G adducts, and one G-DACHPt-G adduct, as confirmed by MS/MS spectra obtained by collision induced dissociation. These adducts were also characterised by UV absorption data and SF-ICP-MS elemental (195)Pt and (31)P signals. Further, interaction of oxaliplatin with AG and GG di-nucleotides resulted in the formation of three adducts: DACHPt-GG and two isomers of the DACHPt-AG adduct, as confirmed by ESI-MS and the complementary data obtained by UV and SF-ICP-MS. Finally, a very sensitive LC-ICP-MS method for the quantification of oxaliplatin GG intra-strand adducts (DACHPt-GG) was developed and used for monitoring the in vitro formation and repair of these adducts in human colorectal cancer cells. The method detection limit was 0.14 ppb Pt which was equivalent to 0.22 Pt adduct per 10(6) nucleotides based on a 10 μg DNA sample. This detection limit makes this method suitable for in vivo assessment of DACHPt-GG adducts in patients undergoing oxaliplatin chemotherapy.
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Affiliation(s)
- Aref Zayed
- Centre for Analytical Science, Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK
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Balcerzak M. Methods for the Determination of Platinum Group Elements in Environmental and Biological Materials: A Review. Crit Rev Anal Chem 2011. [DOI: 10.1080/10408347.2011.588922] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Neher TM, Turchi JJ. Current advances in DNA repair: regulation of enzymes and pathways involved in maintaining genomic stability. Antioxid Redox Signal 2011; 14:2461-4. [PMID: 21235357 PMCID: PMC3096511 DOI: 10.1089/ars.2010.3748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Novel discoveries in the DNA repair field have lead to continuous and rapid advancement of our understanding of not only DNA repair but also DNA replication and recombination. Research in the field transcends numerous areas of biology, biochemistry, physiology, and medicine, making significant connections across these broad areas of study. From early studies conducted in bacterial systems to current analyses in eukaryotic systems and human disease, the innovative research into the mechanisms of repair machines and the consequences of ineffective DNA repair has impacted a wide scientific community. This Forum contains a select mix of primary research articles in addition to a number of timely reviews covering a subset of DNA repair pathways where recent advances and novel discoveries are improving our understanding of DNA repair, its regulation, and implications to human disease.
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Affiliation(s)
- Tracy M. Neher
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - John J. Turchi
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana
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Cavill R, Kamburov A, Ellis JK, Athersuch TJ, Blagrove MSC, Herwig R, Ebbels TMD, Keun HC. Consensus-phenotype integration of transcriptomic and metabolomic data implies a role for metabolism in the chemosensitivity of tumour cells. PLoS Comput Biol 2011; 7:e1001113. [PMID: 21483477 PMCID: PMC3068923 DOI: 10.1371/journal.pcbi.1001113] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 02/25/2011] [Indexed: 01/22/2023] Open
Abstract
Using transcriptomic and metabolomic measurements from the NCI60 cell line panel,
together with a novel approach to integration of molecular profile data, we show
that the biochemical pathways associated with tumour cell chemosensitivity to
platinum-based drugs are highly coincident, i.e. they describe a consensus
phenotype. Direct integration of metabolome and transcriptome data at the point
of pathway analysis improved the detection of consensus pathways by 76%,
and revealed associations between platinum sensitivity and several metabolic
pathways that were not visible from transcriptome analysis alone. These pathways
included the TCA cycle and pyruvate metabolism, lipoprotein uptake and
nucleotide synthesis by both salvage and de novo pathways. Extending the
approach across a wide panel of chemotherapeutics, we confirmed the specificity
of the metabolic pathway associations to platinum sensitivity. We conclude that
metabolic phenotyping could play a role in predicting response to platinum
chemotherapy and that consensus-phenotype integration of molecular profiling
data is a powerful and versatile tool for both biomarker discovery and for
exploring the complex relationships between biological pathways and drug
response. Resistance to chemotherapy drugs in cancer sufferers is very common. Using a
panel of 59 cell lines obtained from different types of cancer we study the
links between the genes and metabolites measured in these cells and the
resistance the cells show to common cancer drugs containing platinum. In order
to combine the information given by the genes and metabolites we introduce a new
pathway-based approach, which allows us to explore synergy between the different
types of data. We then extend the procedure to look at a wider panel of drugs
and show that the pathways we found were associated with platinum are not just
the pathways which are frequently selected for a large number of drugs. Given
the increasing use of multiple sets of measurements (genes, metabolites,
proteins etc.) in biological studies, we demonstrate a powerful, yet
straightforward method for dealing with the resulting large datasets and
integrating their knowledge. We believe that this work could contribute to
developing a personalised medicine approach to treating tumours, where the
genetic and metabolic changes in the tumour are measured and then used for
prediction of the optimal treatment regime.
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Affiliation(s)
- Rachel Cavill
- Biomolecular Medicine, Department of Surgery
and Cancer, Faculty of Medicine, Imperial College London, London, United
Kingdom
| | - Atanas Kamburov
- Max Planck Institute for Molecular Genetics,
Berlin, Germany
| | - James K. Ellis
- Biomolecular Medicine, Department of Surgery
and Cancer, Faculty of Medicine, Imperial College London, London, United
Kingdom
| | - Toby J. Athersuch
- Biomolecular Medicine, Department of Surgery
and Cancer, Faculty of Medicine, Imperial College London, London, United
Kingdom
- MRC-HPA Centre for Environment and Health,
Department of Epidemiology and Biostatistics, School of Public Health, Faculty
of Medicine, Imperial College London, London, United Kingdom
| | | | - Ralf Herwig
- Max Planck Institute for Molecular Genetics,
Berlin, Germany
| | - Timothy M. D. Ebbels
- Biomolecular Medicine, Department of Surgery
and Cancer, Faculty of Medicine, Imperial College London, London, United
Kingdom
- * E-mail: (HCK); (TMDE)
| | - Hector C. Keun
- Biomolecular Medicine, Department of Surgery
and Cancer, Faculty of Medicine, Imperial College London, London, United
Kingdom
- * E-mail: (HCK); (TMDE)
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Henderson PT, Li T, He M, Zhang H, Malfatti M, Gandara D, Grimminger PP, Danenberg KD, Beckett L, de Vere White RW, Turteltaub KW, Pan CX. A microdosing approach for characterizing formation and repair of carboplatin-DNA monoadducts and chemoresistance. Int J Cancer 2011; 129:1425-34. [PMID: 21128223 DOI: 10.1002/ijc.25814] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 11/04/2010] [Indexed: 12/13/2022]
Abstract
Formation and repair of platinum (Pt)-induced DNA adducts is a critical step in Pt drug-mediated cytotoxicity. Measurement of Pt-DNA adduct kinetics in tumors may be useful for better understanding chemoresistance and therapeutic response. However, this concept has yet to be rigorously tested because of technical challenges in measuring the adducts at low concentrations and consistent access to sufficient tumor biopsy material. Ultrasensitive accelerator mass spectrometry was used to detect [(14)C]carboplatin-DNA monoadducts at the attomole level, which are the precursors to Pt-DNA crosslink formation, in six cancer cell lines as a proof-of-concept. The most resistant cells had the lowest monoadduct levels at all time points over 24 hr. [(14)C]Carboplatin "microdoses" (1/100th the pharmacologically effective concentration) had nearly identical adduct formation and repair kinetics compared to therapeutically relevant doses, suggesting that the microdosing approach can potentially be used to determine the pharmacological effects of therapeutic treatment. Some of the possible chemoresistance mechanisms were also studied, such as drug uptake/efflux, intracellular inactivation and DNA repair in selected cell lines. Intracellular inactivation and efficient DNA repair each contributed significantly to the suppression of DNA monoadduct formation in the most resistant cell line compared to the most sensitive cell line studied (p < 0.001). Nucleotide excision repair (NER)-deficient and -proficient cells showed substantial differences in carboplatin monoadduct concentrations over 24 hr that likely contributed to chemoresistance. The data support the utility of carboplatin microdosing as a translatable approach for defining carboplatin-DNA monoadduct formation and repair, possibly by NER, which may be useful for characterizing chemoresistance in vivo.
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Affiliation(s)
- Paul T Henderson
- Division of Hematology and Oncology, Department of Internal Medicine, University of California Davis Medical Center, Sacramento, CA 95817, USA.
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Chapman EG, Hostetter AA, Osborn MF, Miller AL, DeRose VJ. Binding of kinetically inert metal ions to RNA: the case of platinum(II). Met Ions Life Sci 2011; 9:347-77. [PMID: 22010278 PMCID: PMC4080900 DOI: 10.1039/9781849732512-00347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In this chapter several aspects of Pt(II) are highlighted that focus on the properties of Pt(II)-RNA adducts and the possibility that they influence RNA-based processes in cells. Cellular distribution of Pt(II) complexes results in significant platination of RNA, and localization studies find Pt(II) in the nucleus, nucleolus, and a distribution of other sites in cells. Treatment with Pt(II) compounds disrupts RNA-based processes including enzymatic processing, splicing, and translation, and this disruption may be indicative of structural changes to RNA or RNA-protein complexes. Several RNA-Pt(II) adducts have been characterized in vitro by biochemical and other methods. Evidence for Pt(II) binding in non-helical regions and for Pt(II) cross-linking of internal loops has been found. Although platinated sites have been identified, there currently exists very little in the way of detailed structural characterization of RNA-Pt(II) adducts. Some insight into the details of Pt(II) coordination to RNA, especially RNA helices, can be gained from DNA model systems. Many RNA structures, however, contain complex tertiary folds and common, purine-rich structural elements that present suitable Pt(II) nucleophiles in unique arrangements which may hold the potential for novel types of platinum-RNA adducts. Future research aimed at structural characterization of platinum-RNA adducts may provide further insights into platinum-nucleic acid binding motifs, and perhaps provide a rationale for the observed inhibition by Pt(II) complexes of splicing, translation, and enzymatic processing.
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Affiliation(s)
- Erich G. Chapman
- Department of Chemistry University of Oregon Eugene OR 97403 USA
| | | | - Maire F. Osborn
- Department of Chemistry University of Oregon Eugene OR 97403 USA
| | - Amanda L. Miller
- Department of Chemistry University of Oregon Eugene OR 97403 USA
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35
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Kassem LA, Yassin NA. Role of erythropoeitin in prevention of chemotherapy-induced peripheral neuropathy. Pak J Biol Sci 2010; 13:577-587. [PMID: 21061908 DOI: 10.3923/pjbs.2010.577.587] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Neurotoxicity complicates the use of several commonly administered chemotherapeutic agents (platinum based alkylating agents, taxanes and vinca alkaloids), with chemotherapy-induced peripheral neuropathy being the most common manifestation. Structural damage to the peripheral nervous system results in positive symptoms, e.g., allodynia, hyperalgesia and pain with unpleasant features as burning and shooting. Patients are unable to complete full or optimal treatment schedules. The pathophysiologic basis of nerve injury in chemotherapy-induced peripheral neuropathy is incompletely understood and appears to be unique for each class of the chemotherapeutic agents. Erythropoeitin (EPO), a well-established hematopoietic factor, is a very effective and widely used treatment for anemia in cancer patients undergoing chemotherapy. It also possesses generalized neuroprotective and neurotrophic properties. Co-treatment of chemotherapy and erythropoietin has been proposed for preventing or reversing the disabling peripheral neuropathy induced by the different chemotherapeutic agents. This study first describes the pathophysiological background of the clinically relevant chemotherapeutic agents-inducing peripheral neuropathy. Secondly, the possible mechanisms that might underlie the neuroprotective effect of erythropoietin in chemotherapy-induced neuropathy. Further clinical trials of EPO in cancer patients receiving chemotherapy and suffering from neurological symptoms seem to be warranted in the future. This might improve the quality of life in cancer patients.
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Antonacopoulou AG, Argyriou AA, Scopa CD, Kottorou A, Kominea A, Peroukides S, Kalofonos HP. Integrin beta-3 L33P: a new insight into the pathogenesis of chronic oxaliplatin-induced peripheral neuropathy? Eur J Neurol 2010; 17:963-8. [DOI: 10.1111/j.1468-1331.2010.02966.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Owonikoko TK, Ramalingam SS, Kanterewicz B, Balius TE, Belani CP, Hershberger PA. Vorinostat increases carboplatin and paclitaxel activity in non-small-cell lung cancer cells. Int J Cancer 2010; 126:743-55. [PMID: 19621389 DOI: 10.1002/ijc.24759] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We observed a 53% response rate in non-small cell lung cancer (NSCLC) patients treated with vorinostat plus paclitaxel/carboplatin in a Phase I trial. Studies were undertaken to investigate the mechanism (s) underlying this activity. Growth inhibition was assessed in NSCLC cells by MTT assay after 72 hr of continuous drug exposure. Vorinostat (1 microM) inhibited growth by: 17% +/- 7% in A549, 28% +/- 6% in 128-88T, 39% +/- 8% in Calu1 and 41% +/- 7% in 201T cells. Vorinostat addition to carboplatin or paclitaxel led to significantly greater growth inhibition than chemotherapy alone in all 4 cell lines. Vorinostat (1 microM) synergistically increased the growth inhibitory effects of carboplatin/paclitaxel in 128-88T cells. When colony formation was measured after drug withdrawal, vorinostat significantly increased the effects of carboplatin but not paclitaxel. The % colony formation was control 100%; 1 microM vorinostat, 83% +/- 10%; 5 microM carboplatin, 41% +/- 11%; carboplatin/vorinostat, 8% +/- 4%; 2 nM paclitaxel, 53% +/- 11%; paclitaxel/vorinostat, 46% +/- 21%. In A549 and 128-88T, vorinostat potentiated carboplatin induction of gamma-H2AX (a DNA damage marker) and increased alpha-tubulin acetylation (a marker for stabilized mictrotubules). In A549, combination of vorinostat with paclitaxel resulted in a synergistic increase in alpha-tubulin acetylation, which reversed upon drug washout. We conclude that vorinostat interacts favorably with carboplatin and paclitaxel in NSCLC cells, which may explain the provocative response observed in our clinical trial. This likely involves a vorinostat-mediated irreversible increase in DNA damage in the case of carboplatin and a reversible increase in microtubule stability in the case of paclitaxel.
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Khrunin AV, Moisseev A, Gorbunova V, Limborska S. Genetic polymorphisms and the efficacy and toxicity of cisplatin-based chemotherapy in ovarian cancer patients. THE PHARMACOGENOMICS JOURNAL 2009; 10:54-61. [PMID: 19786980 DOI: 10.1038/tpj.2009.45] [Citation(s) in RCA: 141] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Platinum drugs are among the most active and widely used agents in the treatment of different cancers. However, the great individual variability in both outcome and toxicity of platinum chemotherapy requires the identification of genetic markers that can be used to screen patients before treatment. In this study, 21 polymorphisms in 10 genes, the protein activities of which may be addressed in different aspects of cisplatin metabolism, were tested for correlations with efficacy and toxicity of cisplatin-cyclophosphamide regimen in 104 ovarian cancer patients. The glutathione S-transferase P1 (GSTP1) Ile105Val polymorphism was strongly associated with progression-free survival (chi(2)=12.12, P=0.002). The allelic status of the GSTA1 -69 C>T polymorphism correlated with the overall survival: patients with T/T genotype survived longer than C/C carriers (P=0.044). Thrombocytopenia, anemia and neuropathy were less frequent among patients with the GSTM1-null or GSTM3 intron 6 AGG/AGG genotypes. Severe neutropenia was associated with the TP53 72 Pro/Pro, XPD 312 Asp/Asn and XRCC1 399 Arg/Arg genotypes. A higher risk of nephrotoxicity was noted for patients with the heterozygous ERCC1 19007 T/C and 8092 C/A genotypes. No correlations were found between genotypes and complete tumor responses.
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Affiliation(s)
- A V Khrunin
- Department of Molecular Bases of Human Genetics, Institute of Molecular Genetics, Russian Academy of Sciences, Moscow, Russia.
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Argyriou AA, Polychronopoulos P, Iconomou G, Koutras A, Makatsoris T, Gerolymos MK, Gourzis P, Assimakopoulos K, Kalofonos HP, Chroni E. Incidence and characteristics of peripheral neuropathy during oxaliplatin-based chemotherapy for metastatic colon cancer. Acta Oncol 2009; 46:1131-7. [PMID: 17851880 DOI: 10.1080/02841860701355055] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AIM The current prospective study sought to trace the incidence and severity of oxaliplatin-induced peripheral neuropathy (OXLIPN) and to determine its clinical and electrophysiological pattern. PATIENTS AND METHODS Twenty-five adult patients scheduled to be treated with 12 courses of the oxaliplatin-based regimen, FOLFOX-4, for metastatic colon cancer participated in this study. Patients were clinically and electrophysiologically monitored at baseline and followed-up during chemotherapy. The severity of OXLIPN was summarized by means of a modified Total Neuropathy Score (TNS). RESULTS Evidence of OXLIPN was disclosed in 16 of the 25 patients (64%). The mean TNS values for patients manifesting some grade of OXLIPN were 13.9 +/- 5.8 (range 7-28). All longitudinal comparisons concerning the motor conduction parameters failed to reach significance. By contrast, comparisons of the median changes at baseline and each of the follow-up studies revealed significant decrease in all sensory action potentials examined. CONCLUSION Our results indicate that the majority of patients treated with the FOLFOX-4 regimen would manifest an axonal, predominately sensory peripheral neuropathy, of mild to moderate severity.
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Affiliation(s)
- Andreas A Argyriou
- Department of Neurology-EMG Laboratory, University of Patras Medical School, Rion-Patras, Greece.
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Preston TJ, Henderson JT, McCallum GP, Wells PG. Base excision repair of reactive oxygen species-initiated 7,8-dihydro-8-oxo-2'-deoxyguanosine inhibits the cytotoxicity of platinum anticancer drugs. Mol Cancer Ther 2009; 8:2015-26. [PMID: 19567822 DOI: 10.1158/1535-7163.mct-08-0929] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Anticancer therapy with cisplatin and oxaliplatin is limited by toxicity and onset of tumor resistance. Both drugs form platinum-DNA cross-linked adducts, and cisplatin causes oxidative DNA damage including the 7,8-dihydro-8-oxo-2'-deoxyguanosine (8-oxodG) lesion. To assess oxidative DNA damage as a mechanism of cisplatin and oxaliplatin cytotoxicity, 8-oxodG-directed base excision repair was stably enhanced in human embryonic kidney cells by FLAG-tagged expression of human oxoguanine glycosylase 1 (alpha-OGG1) or its functional homologue, Escherichia coli formamidopyrimidine glycosylase (fpg). Both drugs increased reactive oxygen species and 8-oxodG levels, and cytotoxicity was decreased by antioxidant pretreatment. Ectopic expression of alpha-OGG1 or fpg in cell clones increased nuclear and mitochondrial 8-oxodG repair, and reduced death by reactive oxygen species initiators (H(2)O(2), menadione) and both platinum drugs. Exposure to oxaliplatin caused a more marked and sustained block of cell proliferation than exposure to cisplatin. We conclude that the 8-oxodG lesion is cytotoxic, and base excision repair a likely determinant of risk. The greater antitumor efficacy of oxaliplatin seems unrelated to oxidative DNA damage, suggesting a novel strategy for improving the therapeutic index in cancer therapy.
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Hernlund E, Hjerpe E, Avall-Lundqvist E, Shoshan M. Ovarian carcinoma cells with low levels of beta-F1-ATPase are sensitive to combined platinum and 2-deoxy-D-glucose treatment. Mol Cancer Ther 2009; 8:1916-23. [PMID: 19567816 DOI: 10.1158/1535-7163.mct-09-0179] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have here examined chemopotentiating effects of glycolysis inhibitor 2-deoxy-d-glucose (DG) in two epithelial ovarian carcinoma (EOC) cell lines and 17 freshly isolated ascitic EOC cell samples, and we identify low expression of the beta-F1-ATPase involved in mitochondrial ATP production as a candidate marker for sensitivity to this strategy. Although in the majority of samples, DG per se did not induce apoptosis, cotreatment with DG potentiated apoptosis and total antiproliferative effects of cisplatin and, to a lesser degree, carboplatin. In the cell lines, combination treatment with DG and cisplatin or carboplatin at noninhibitory concentrations prevented posttreatment regrowth in drug-free medium over a total of 5 days. DG per se allowed complete recuperation in drug-free medium. The more platinum-resistant a cell line was, the more sensitive it was to potentiation by DG and showed higher glucose uptake, DG-sensitive lactate production, and lower beta-F1-ATPase levels. In the ascitic samples, DG reduced the median IC(50) for cisplatin by 68% and, in the most sensitive samples, up to 90%, and DG-mediated potentiation correlated with low expression of beta-F1-ATPase. By contrast, cisplatin sensitivity did not correlate with beta-F1-ATPase levels. The findings validate targeting cancer cell glucose metabolism for potentiating platinum chemotherapy in EOC and indicate that reduced beta-F1-ATPase/oxidative phosphorylation distinguishes cells that are amenable to this strategy.
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Affiliation(s)
- Emma Hernlund
- Department of Oncology-Pathology, Cancer Center Karolinska R8, Karolinska Institutet, Stockholm, Sweden
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42
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Prieto González EA, Fuchs AG, Sánchez GS. Amifostine (WR2721) confers DNA protection to in vivo cisplatin-treated murine peripheral blood leukocytes. Dose Response 2009; 7:234-46. [PMID: 19809542 DOI: 10.2203/dose-response.08-026.prieto] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Amifostine [S-2-3-aminopropyl amino ethyl phosphorotioic acid], a modulator agent for antineoplastic drugs involved in free radicals generation has given controversial results in cisplatin treated leukocytes in vitro. We have evaluated the amifostine protection over leukocytes in vivo, using comet assay. Groups of five OF1 male mice were given one of three doses of amifostine (56, 105 and 200 mg/Kg) after a cisplatin single injection (10 mg/Kg). Serum malonyldialdehyde levels, catalase and superoxide dismutase activity were also evaluated. Amifostine showed significant DNA protection (p< 0.01) at the two lower doses evaluated. Malonyldialdehyde decreased in all amifostine treatments with respect to cisplatin while antioxidant enzyme activities remained unchanged. However, DNA migration increased with the highest amifostine dose; in fact highest dose of amifostine did no protect damage caused by cisplatin this result have implications on amifostine treatment schedules in clinical practice.
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Affiliation(s)
- E A Prieto González
- Centro de Altos Estudios en Ciencias de la Salud, Universidad Abierta Interamericana, Ave. Montes de Oca. No. 745, Buenos Aires Capital, Federal Argentina.
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Joseph EK, Levine JD. Comparison of oxaliplatin- and cisplatin-induced painful peripheral neuropathy in the rat. THE JOURNAL OF PAIN 2009; 10:534-41. [PMID: 19231296 DOI: 10.1016/j.jpain.2008.12.003] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 12/06/2008] [Accepted: 12/17/2008] [Indexed: 11/30/2022]
Abstract
UNLABELLED Although platinum-based cancer chemotherapies produce painful peripheral neuropathy as dose-limiting side effects, there are important differences in the pain syndromes produced by members of this class of drugs. In the rat, cisplatin-induced hyperalgesia has latency to onset of 24 to 48 hours, is maximal by 72 to 96 hours, and is attenuated by inhibitors of caspase signaling but not by inhibitors of the mitochondrial electron transport chain (mETC) and antioxidants. In contrast, oxaliplatin-induced mechanical hyperalgesia is already present by 5 minutes and peaks by 20 minutes. Whereas oxaliplatin hyperalgesia persists for weeks, starting around day 10 to 15, its severity decreases to a lower 2nd plateau level. The rapid-onset 1st plateau in oxaliplatin-induced hyperalgesia was characterized by prominent cold allodynia and in contrast to cisplatin was attenuated by inhibitors of the mETC and antioxidants but not inhibitors of caspase signaling. However, tested later during the 2nd plateau, it was characterized by less intense hyperalgesia and no cold allodynia and was attenuated by inhibitors of caspase signaling as well as by inhibitors of the mETC and by antioxidants. PERSPECTIVE The findings of this study distinguish between the neuropathic pain syndromes produced by members of a single chemical class of anticancer drugs and suggest that the underlying mechanisms of various forms of peripheral neuropathy may be different. Further, it defines the need for selective therapy for different types of neuropathy.
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Affiliation(s)
- Elizabeth K Joseph
- Department of Oral and Maxillofacial Surgery and Division of Neuroscience, University of California at San Francisco, San Francisco, CA 94143-0440, USA.
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44
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Brouwers EEM, Huitema ADR, Beijnen JH, Schellens JHM. Long-term platinum retention after treatment with cisplatin and oxaliplatin. BMC CLINICAL PHARMACOLOGY 2008; 8:7. [PMID: 18796166 PMCID: PMC2559818 DOI: 10.1186/1472-6904-8-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Accepted: 09/17/2008] [Indexed: 01/01/2023]
Abstract
Background The aim of this study was to evaluate long-term platinum retention in patients treated with cisplatin and oxaliplatin. Methods 45 patients, treated 8–75 months before participating in this study, were included. Platinum levels in plasma and plasma ultrafiltrate (pUF) were determined. In addition, the reactivity of platinum species in pUF was evaluated. Relationships between platinum retention and possible determinants were evaluated. Results Platinum plasma concentrations ranged between 142–2.99 × 103 ng/L. Up to 24% of plasma platinum was recovered in pUF. No platinum-DNA adducts in peripheral blood mononuclear cells (PBMCs) could be detected. Ex vivo incubation of DNA with pUF of patients revealed that up to 10% of the reactivity of platinum species was retained. Protein binding proceeded during sample storage. Sodium thiosulfate (STS) appeared to release platinum from the plasma proteins. Platinum levels were related to time, dose, STS co-administration, and glomerular filtration rates (GFR). Conclusion Our data suggest that plasma platinum levels are related to time, age, dose, GFR, and STS use. Platinum in plasma, probably, represent platinum eliminated from regenerating tissue. Platinum species in pUF were partly present in a reactive form. The effects of the reactivity on long-term consequences of Pt-containing chemotherapy, however, remains to be established.
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Affiliation(s)
- Elke E M Brouwers
- Department of Pharmacy & Pharmacology, Slotervaart Hospital/The Netherlands Cancer Institute, Louwesweg 6, 1066 EC Amsterdam, The Netherlands.
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45
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Pucci D, Bellusci A, Bernardini S, Bloise R, Crispini A, Federici G, Liguori P, Lucas MF, Russo N, Valentini A. Bioactive fragments synergically involved in the design of new generation Pt(ii) and Pd(ii)-based anticancer compounds. Dalton Trans 2008:5897-904. [PMID: 19082045 DOI: 10.1039/b808093c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New Pt(ii) and Pd(ii) complexes with the metal center coordinated to two different chelating ligands, tropolone (trop) and dihexadecyl-2,2'-bipyridine-4,4'-dicarboxylate bipyridine (bipy), [(bipy)M(trop)][CF(3)SO(3)], have been synthesized and their biological evaluation has been performed demonstrating a remarkable cytotoxic activity in vitro against the human prostate DU145 and hormone-sensitive LNCaP cells lines. Moreover, for the Pt(ii) derivative, the molecular structure has been determined by single-crystal X-ray diffraction and computational analysis on the hydrolysis reaction mechanisms have been performed by density functional theory (DFT) calculations, in order to correlate molecular structure, biological activity and mechanism of action of this new class of complexes based on two different bioactive fragments.
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Affiliation(s)
- Daniela Pucci
- Centro di Eccellenza CEMIF, CAL-LASCAMM, Unità INSTM della Calabria, Dipartimento di Chimica Università della Calabria, 87030, Arcavacata di Rende (CS), Italy.
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Mowaka S, Linscheid M. Separation and characterization of oxaliplatin dinucleotides from DNA using HPLC-ESI ion trap mass spectrometry. Anal Bioanal Chem 2008; 392:819-30. [PMID: 18709362 DOI: 10.1007/s00216-008-2311-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Revised: 07/11/2008] [Accepted: 07/18/2008] [Indexed: 12/01/2022]
Abstract
Oxaliplatin is a third-generation platinum complex, and has a broad spectrum of antitumor activity. Such platinum complexes with the DACH carrier ligand have recently received increasing attention since they show efficacy against cisplatin-resistant cell lines. As the foremost indication of antitumor activity of platinum drugs is the formation of adducts with genomic DNA, calf thymus DNA-oxaliplatin adducts were the major target in this study. Calf thymus DNA was incubated with oxaliplatin, resulting in the formation of a large number of platinum-DNA adducts. Treated DNA was digested into the dinucleotides with a combination of enzymes, namely, benzonase, alkaline phosphatase, and nuclease S1. Using a high-performance liquid chromatography, we carried out the separation of individual platinum-DNA adducts which were concurrently identified using electrospray ionization ion trap mass spectrometry (MS). Both 1,2-intrastrand and 1,2-interstrand cross-linked adducts were found; however, those of the intrastrand nature have a considerably higher abundance than those of the interstrand cross-links. Among them, d(GpG)-oxaliplatin was the most abundant bifuctional adduct. To a lesser extent, a few monofunctional adducts were detected as well. MS(n) experiments served to ascertain the detailed structures of oxaliplatin adducts of dinucleoside monophosphates and of dinucleotides.
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Affiliation(s)
- Shereen Mowaka
- Department of Chemistry, Humboldt Universitaet zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
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47
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Fabrik I, Krizkova S, Huska D, Adam V, Hubalek J, Trnkova L, Eckschlager T, Kukacka J, Prusa R, Kizek R. Employment of Electrochemical Techniques for Metallothionein Determination in Tumor Cell Lines and Patients with a Tumor Disease. ELECTROANAL 2008. [DOI: 10.1002/elan.200704215] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Tao Z, Jones E, Goodisman J, Souid AK. Quantitative measure of cytotoxicity of anticancer drugs and other agents. Anal Biochem 2008; 381:43-52. [PMID: 18602881 DOI: 10.1016/j.ab.2008.06.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 06/12/2008] [Accepted: 06/13/2008] [Indexed: 02/06/2023]
Abstract
Many anticancer drugs act on cancer cells to promote apoptosis, which includes impairment of cellular respiration (mitochondrial O(2) consumption). Other agents also inhibit cellular respiration, sometimes irreversibly. To investigate the sensitivity of cancer cells to cytotoxins, including anticancer drugs, we compare the profiles of cellular O(2) consumption in the absence and presence of these agents. Oxygen measurements are made at 37 degrees C, using glucose as a substrate, with [O(2)] obtained from the phosphorescence decay rate of a palladium phosphor. The rate of respiration k is defined as -d[O(2)]/dt in a sealed container. Different toxins produce different profiles of impaired respiration, implying different mechanisms for the drug-induced mitochondrial dysfunction. The decrease in the average value of k over a fixed time period, I, is proposed as a characteristic value to assess mitochondrial injury. The value of I depends on the nature of the toxin, its concentration, and the exposure time as well as on the cell type. Results for several cell types and 10 cytotoxins are presented here.
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Affiliation(s)
- Zhimin Tao
- Department of Pediatrics, State University of New York, Upstate Medical University, Syracuse, NY 13210, USA
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Hernlund E, Ihrlund LS, Khan O, Ates YO, Linder S, Panaretakis T, Shoshan MC. Potentiation of chemotherapeutic drugs by energy metabolism inhibitors 2-deoxyglucose and etomoxir. Int J Cancer 2008; 123:476-483. [PMID: 18452174 DOI: 10.1002/ijc.23525] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Inhibition of energy production as a strategy for potentiation of anticancer chemotherapy was investigated using 1 glycolysis inhibitor and 1 fatty acid beta-oxidation inhibitor-2-deoxyglucose and etomoxir, respectively, both known to be clinically well tolerated. Eighteen anticancer drugs were screened for potentiation by these inhibitors. 2-deoxyglucose potentiated acute apoptosis (24 hr) induced mainly by some, but not all, genotoxic drugs, whereas etomoxir had effect only on cisplatin. By contrast, etomoxir did potentiate the overall, 48 hr effects of some genotoxic drugs, and was in addition more efficient than deoxyglucose in potentiating the overall effects of several non-genotoxic drugs. Both types of potentiation were largely lost in the absence of p53. Because cisplatin was potentiated by both energy inhibitors in both types of assay, it was investigated at additional concentrations and over longer time. Both energy inhibitors strongly potentiated non-apoptotic concentrations of cisplatin in p53-wildtype as well as in p53-deficient, cisplatin-resistant HCT-116 colon carcinoma cells. Reduced ATP levels correlated with, but were not sole determinants, the antiproliferative effects. We conclude that the long-term effects of cisplatin potentiation are important and either p53-independent or improved by a lack of p53. We also conclude that although the potentiated drugs as yet have no obvious mechanistic factor in common, the strategy holds promise with genotoxic as well non-genotoxic anticancer drugs.
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Affiliation(s)
- Emma Hernlund
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden
| | | | - Omar Khan
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden.,Department of Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Yildiz Ozlem Ates
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden.,Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul, Turkey
| | - Stig Linder
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden
| | - Theocharis Panaretakis
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden.,Institut Gustave Roussy, 39 rue Camille Desmoulins, Villejuif, France
| | - Maria C Shoshan
- Department of Oncology-Pathology, Karolinska Institute, S-171 76 Stockholm, Sweden
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Argyriou AA, Polychronopoulos P, Iconomou G, Chroni E, Kalofonos HP. A review on oxaliplatin-induced peripheral nerve damage. Cancer Treat Rev 2008; 34:368-77. [PMID: 18281158 DOI: 10.1016/j.ctrv.2008.01.003] [Citation(s) in RCA: 212] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Revised: 01/07/2008] [Accepted: 01/08/2008] [Indexed: 01/24/2023]
Abstract
Platinum compounds are a class of chemotherapy agents that posses a broad spectrum of activity against several solid malignancies. Oxaliplatin (OXL) is a third-generation organoplatinum compound with significant activity mainly against colorectal cancer (CRC). Peripheral neuropathy is a well recognized toxicity of OXL, usually resulting in dose modification. OXL induces two types of peripheral neuropathy; acute and chronic. The acute oxaliplatin-induced peripheral neuropathy (OXLIPN) may be linked to the rapid chelation of calcium by OXL-induced oxalate and OXL is capable of altering the voltage-gated sodium channels through a pathway involving calcium ions. On the other hand, decreased cellular metabolism and axoplasmatic transport resulting from the accumulation of OXL in the dorsal root ganglia cells is the most widely accepted mechanism of chronic oxaliplatin-induced peripheral neuropathy (OXLIPN). As a result, OXL produces a symmetric, axonal, sensory distal primary neuronopathy without motor involvement. The incidence of OXLIPN is usually related to various risk factors, including treatment schedule, dosage, cumulative dose and time of infusion. The assessment of OXLIPN is primarily based on neurologic clinical examination and quantitative methods, such as nerve conduction study. To date, several neuroprotective agents including thiols, neurotrophic factors, anticonvulsants and antioxidants have been tested for their ability to prevent OXLIPN. However, the clinical data are still controversial. We herein review and discuss the pathogenesis, incidence, risk factors, diagnosis, characteristics and management of OXLIPN. We also highlight areas of future research.
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Affiliation(s)
- Andreas A Argyriou
- Department of Neurology, EMG Laboratory, University of Patras Medical School, Rion-Patras, Greece
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