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A split β-lactamase sensor for the detection of DNA modification by cisplatin and ruthenium-based chemotherapeutic drugs. J Inorg Biochem 2022; 236:111986. [PMID: 36084568 DOI: 10.1016/j.jinorgbio.2022.111986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 08/23/2022] [Accepted: 08/28/2022] [Indexed: 12/15/2022]
Abstract
Here we present a split-enzyme sensor approach for the sequence-specific detection of metal-based drug adducts of DNA. Split β-lactamase reporters were constructed using domain A of the High Mobility Group Box 1 protein (HMGB1a) in conjunction with zinc finger DNA-binding domains. As a proof of concept, the sensors were characterized with the well-known drug cisplatin, which forms 1,2-intrastrand crosslinks with DNA that are recognized by HMGB1a. After promising results with cisplatin, five ruthenium-based drugs were studied, four of which produced significant signal over background. These results highlight the utility of our approach for rapid screening of novel metal-based chemotherapeutic drug candidates and provide evidence that HMGB1a likely binds to DNA adducts formed by NAMI-A (imidazolium trans-tetrachlorodimethylsulfoxideimidazoleruthenate(III)), KP1019 (indazolium trans-tetrachlorodiindazoleruthenate(III)), KP418 (imidazolium trans-tetrachlorodiimidazoleruthenate(III)), and RAPTA-C (dichloro(η6-p-cymene)(1,3,5-triaza-7-phosphaadamantane)ruthenium(II)). These results thus imply a potential biologically relevant mode of action for the ruthenium-based drugs investigated herein.
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2
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Hreusová M, Nováková O, Kostrhunová H, Prachařová J, Brabec V, Kašpárková J. DNA modification by cisplatin-like Pt(II) complexes containing 1,1′-binaphtyl-2,2′-diamine ligand does not correlate with their antiproliferative activity in cancer cells. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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3
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Lv WL, Arnesano F, Carloni P, Natile G, Rossetti G. Effect of in vivo post-translational modifications of the HMGB1 protein upon binding to platinated DNA: a molecular simulation study. Nucleic Acids Res 2019; 46:11687-11697. [PMID: 30407547 PMCID: PMC6294504 DOI: 10.1093/nar/gky1082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 10/19/2018] [Indexed: 12/26/2022] Open
Abstract
Cisplatin is one of the most widely used anticancer drugs. Its efficiency is unfortunately severely hampered by resistance. The High Mobility Group Box (HMGB) proteins may sensitize tumor cells to cisplatin by specifically binding to platinated DNA (PtDNA) lesions. In vivo, the HMGB/PtDNA binding is regulated by multisite post-translational modifications (PTMs). The impact of PTMs on the HMGB/PtDNA complex at atomistic level is here investigated by enhanced sampling molecular simulations. The PTMs turn out to affect the structure of the complex, the mobility of several regions (including the platinated site), and the nature of the protein/PtDNA non-covalent interactions. Overall, the multisite PTMs increase significantly the apparent synchrony of all the contacts between the protein and PtDNA. Consequently, the hydrophobic anchoring of the side chain of F37 between the two cross-linked guanines at the platinated site-a key element of the complexes formation - is more stable than in the complex without PTM. These differences can account for the experimentally measured greater affinity for PtDNA of the protein isoforms with PTMs. The collective behavior of multisite PTMs, as revealed here by the synchrony of contacts, may have a general significance for the modulation of intermolecular recognitions occurring in vivo.
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Affiliation(s)
- Wenping Lyu Lv
- Computational Biomedicine, Institute for Advanced Simulation IAS-5 and Institute of Neuroscience and Medicine INM-9, Forschungszentrum Jülich, 52425 Jülich, Germany.,Faculty of Mathematics, Computer Science and Natural Sciences, RWTH-Aachen University, 52056 Aachen, Germany.,Computation-Based Science and Technology Research Center, Cyprus Institute, 2121 Aglantzia, Nicosia, Cyprus
| | - Fabio Arnesano
- Department of Chemistry, University of Bari "A. Moro", via Edoardo Orabona 4, 70125 Bari, Italy
| | - Paolo Carloni
- Computational Biomedicine, Institute for Advanced Simulation IAS-5 and Institute of Neuroscience and Medicine INM-9, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Giovanni Natile
- Department of Chemistry, University of Bari "A. Moro", via Edoardo Orabona 4, 70125 Bari, Italy
| | - Giulia Rossetti
- Computational Biomedicine, Institute for Advanced Simulation IAS-5 and Institute of Neuroscience and Medicine INM-9, Forschungszentrum Jülich, 52425 Jülich, Germany.,Department of Hematology, Oncology, Hemostaseology, and Stem Cell Transplantation, Faculty of Medicine, RWTH Aachen University, 52062 Aachen, Germany.,Jülich Supercomputing Centre (JSC), Forschungszentrum Jülich, 52425 Jülich, Germany
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4
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Brabec V, Hrabina O, Kasparkova J. Cytotoxic platinum coordination compounds. DNA binding agents. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.04.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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5
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Jalili S, Maddah M, Schofield J. Molecular dynamics simulation and free energy analysis of the interaction of platinum-based anti-cancer drugs with DNA. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2016. [DOI: 10.1142/s0219633616500541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cisplatin and oxaliplatin are two widely-used anti-cancer drugs which covalently bind to a same location in DNA strands. Platinum agents make intrastrand and interstrand cross-links with the N7 atoms of guanine nucleotides which prevent DNA from polymerization by causing a distortion in the double helix. Molecular dynamics simulations and free energy calculations were carried out to investigate the binding of two platinum-based anti-cancer drugs with DNA. We compared the binding of these drugs which differ in their carrier ligands, and hence their potential interactions with DNA. When a platinum agent binds to nucleotides, it causes a high amount of deformation in DNA structure. To find the extent of deformation, torsion angles and base pair and groove parameters of DNA were considered. These parameters were compared with normal B-DNA which was considered as the undamaged DNA. The formation of hydrogen bonds between drugs and DNA nucleotides was examined in solution. It was shown that oxaliplatin forms more hydrogen bonds than cisplatin. Our results confirm that the structure of the platinated DNA rearranges significantly and cisplatin tries to deform DNA more than oxaliplatin. The binding free energies were also investigated to understand the affinities, types and the contributions of interactions between drugs and DNA. It was concluded that oxaliplatin tendency for binding to DNA is more than cisplatin in solvent environment. The binding free energy was calculated based on the MM/PBSA and MM/GBSA methods and the results of QM/MM calculations verified them.
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Affiliation(s)
- Seifollah Jalili
- Department of Chemistry, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran
- Computational Physical Sciences Research Laboratory, School of Nano-Science, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531 Tehran, Iran
| | - Mina Maddah
- Department of Chemistry, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran
| | - Jeremy Schofield
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Ontario M5S 3H6, Canada
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Ateyya H, Yosef H, Nader MA. Ameliorative effect of trimetazidine on cisplatin-induced hepatotoxicity in rats. Can J Physiol Pharmacol 2016; 94:225-230. [DOI: 10.1139/cjpp-2015-0304] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was designed to evaluate the protective effects of trimetazidine (TMZ) against cisplatin (CP) induced liver damage in rats. Animals were distributed among 4 groups as follows: control group; TMZ group (20 mg/kg body mass, per oral), which was treated for 10 days; CP group (6 mg/kg, by intraperitoneal injection), which received a single injection; and the CP + TMZ group (20 mg/kg, per oral), which received TMZ 4 days before and 6 days after CP injection. The extent of hepatic damage was studied by assessing biochemical parameters and histopathological evaluation of the extracted liver tissue. The results revealed that liver enzymes were markedly elevated after injection of CP, as evident from significant increases in the serum levels of alanine transaminase (AST), alanine aminotransferase (ALT), gamma glutamyl transferase (γ-GT), and lactate dehydrogenase (LDH), as well as marked changes to the liver architecture, with a significant decrease in serum levels of albumin. There were also marked changes to the antioxidant defense system, as indicated by significant decreases in total antioxidants and hepatic levels of reduced glutathione (GSH) and superoxide dismutase (SOD), together with a significant increase in lipid peroxidation. However, there was a significant increase in the activity of hepatic nuclear factor kappa B (NF-κB) as well as hepatic Bax protein expression. We conclude that TMZ protects against CP-induced liver damage through scavenging free radicals and anti-inflammatory and antiapoptotic effects, as well as through reducing NF-κB activation.
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Affiliation(s)
- Hayam Ateyya
- College of Pharmacy, Taibah University, Universities Road, El-Madinah El-Munawarah, KSA
- Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Hala Yosef
- College of Medicine, Taibah University, Universities Road, El-Madinah El-Munawarah, KSA
| | - Manar A. Nader
- College of Pharmacy, Taibah University, Universities Road, El-Madinah El-Munawarah, KSA
- Faculty of Pharmacy, Mansoura University, Mansoura, Dakahlia Governorate, Egypt
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7
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Kang R, Chen R, Zhang Q, Hou W, Wu S, Cao L, Huang J, Yu Y, Fan XG, Yan Z, Sun X, Wang H, Wang Q, Tsung A, Billiar TR, Zeh HJ, Lotze MT, Tang D. HMGB1 in health and disease. Mol Aspects Med 2014; 40:1-116. [PMID: 25010388 PMCID: PMC4254084 DOI: 10.1016/j.mam.2014.05.001] [Citation(s) in RCA: 670] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
Complex genetic and physiological variations as well as environmental factors that drive emergence of chromosomal instability, development of unscheduled cell death, skewed differentiation, and altered metabolism are central to the pathogenesis of human diseases and disorders. Understanding the molecular bases for these processes is important for the development of new diagnostic biomarkers, and for identifying new therapeutic targets. In 1973, a group of non-histone nuclear proteins with high electrophoretic mobility was discovered and termed high-mobility group (HMG) proteins. The HMG proteins include three superfamilies termed HMGB, HMGN, and HMGA. High-mobility group box 1 (HMGB1), the most abundant and well-studied HMG protein, senses and coordinates the cellular stress response and plays a critical role not only inside of the cell as a DNA chaperone, chromosome guardian, autophagy sustainer, and protector from apoptotic cell death, but also outside the cell as the prototypic damage associated molecular pattern molecule (DAMP). This DAMP, in conjunction with other factors, thus has cytokine, chemokine, and growth factor activity, orchestrating the inflammatory and immune response. All of these characteristics make HMGB1 a critical molecular target in multiple human diseases including infectious diseases, ischemia, immune disorders, neurodegenerative diseases, metabolic disorders, and cancer. Indeed, a number of emergent strategies have been used to inhibit HMGB1 expression, release, and activity in vitro and in vivo. These include antibodies, peptide inhibitors, RNAi, anti-coagulants, endogenous hormones, various chemical compounds, HMGB1-receptor and signaling pathway inhibition, artificial DNAs, physical strategies including vagus nerve stimulation and other surgical approaches. Future work further investigating the details of HMGB1 localization, structure, post-translational modification, and identification of additional partners will undoubtedly uncover additional secrets regarding HMGB1's multiple functions.
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Affiliation(s)
- Rui Kang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
| | - Ruochan Chen
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Qiuhong Zhang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Wen Hou
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Sha Wu
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Lizhi Cao
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jin Huang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yan Yu
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xue-Gong Fan
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhengwen Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA; Department of Neurology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Experimental Department of Institute of Gynecology and Obstetrics, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510510, China
| | - Haichao Wang
- Laboratory of Emergency Medicine, The Feinstein Institute for Medical Research, Manhasset, NY 11030, USA
| | - Qingde Wang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Allan Tsung
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Herbert J Zeh
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Michael T Lotze
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Daolin Tang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
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Novakova O, Liskova B, Vystrcilova J, Suchankova T, Vrana O, Starha P, Travnicek Z, Brabec V. Conformation and recognition of DNA damaged by antitumor cis-dichlorido platinum(II) complex of CDK inhibitor bohemine. Eur J Med Chem 2014; 78:54-64. [PMID: 24675180 DOI: 10.1016/j.ejmech.2014.03.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/20/2014] [Accepted: 03/14/2014] [Indexed: 12/18/2022]
Abstract
A substitution of the ammine ligands of cisplatin, cis-[Pt(NH3)2Cl2], for cyclin dependent kinase (CDK) inhibitor bohemine (boh), [2-(3-hydroxypropylamino)-6-benzylamino-9-isopropylpurine], results in a compound, cis-[Pt(boh)2Cl2] (C1), with the unique anticancer profile which may be associated with some features of the damaged DNA and/or its cellular processing (Travnicek Z et al. (2003) J Inorg Biochem94, 307-316; Liskova B (2012) Chem Res Toxicol25, 500-509). A combination of biochemical and molecular biology techniques was used to establish mechanistic differences between cisplatin and C1 with respect to the DNA damage they produce and their interactions with critical DNA-binding proteins, DNA-processing enzymes and glutathione. The results show that replacement of the NH3 groups in cisplatin by bohemine modulates some aspects of the mechanism of action of C1. More specifically, the results of the present work are consistent with the thesis that, in comparison with cisplatin, effects of other factors, such as: (i) slower rate of initial binding of C1 to DNA; (ii) the lower efficiency of C1 to form bifunctional adducts; (iii) the reduced bend of longitudinal DNA axis induced by the major 1,2-GG intrastrand cross-link of C1; (iv) the reduced affinity of HMG domain proteins to the major adduct of C1; (v) the enhanced efficiency of the DNA adducts of C1 to block DNA polymerization and to inhibit transcription activity of human RNA pol II and RNA transcription; (vi) slower rate of the reaction of C1 with glutathione, may partially contribute to the unique activity of C1.
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Affiliation(s)
- Olga Novakova
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic
| | - Barbora Liskova
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic
| | - Jana Vystrcilova
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic
| | - Tereza Suchankova
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic
| | - Oldrich Vrana
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic
| | - Pavel Starha
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic
| | - Zdenek Travnicek
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of The Czech Republic, v.v.i., CZ-61265 Brno, Czech Republic.
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He JP, Hao Y, Wang XL, Yang XJ, Shao JF, Guo FJ, Feng JX. Review of the molecular pathogenesis of osteosarcoma. Asian Pac J Cancer Prev 2014; 15:5967-5976. [PMID: 25124559 DOI: 10.7314/apjcp.2014.15.15.5967] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023] Open
Abstract
Treating the osteosarcoma (OSA) remains a challenge. Current strategies focus on the primary tumor and have limited efficacy for metastatic OSA. A better understanding of the OSA pathogenesis may provide a rational basis for innovative treatment strategies especially for metastases. The aim of this review is to give an overview of the molecular mechanisms of OSA tumorigenesis, OSA cell proliferation, apoptosis, migration, and chemotherapy resistance, and how improved understanding might contribute to designing a better treatment target for OSA.
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Affiliation(s)
- Jin-Peng He
- Pediatric Surgery Department, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China E-mail : ,
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Mlcouskova J, Malina J, Novohradsky V, Kasparkova J, Komeda S, Brabec V. Energetics, conformation, and recognition of DNA duplexes containing a major adduct of an anticancer azolato-bridged dinuclear PtII complex. Biochim Biophys Acta Gen Subj 2012; 1820:1502-11. [DOI: 10.1016/j.bbagen.2012.05.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 05/25/2012] [Accepted: 05/30/2012] [Indexed: 11/24/2022]
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Elder RM, Jayaraman A. Role of structure and dynamics of DNA with cisplatin and oxaliplatin adducts in various sequence contexts on binding of HMGB1a. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2011.654208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Abstract
Proteins in the HMG family are important transcription factors. They recognize cisplatin-damaged DNA lesions with a structure-specific preference and account for more than 70% of all proteins that interact with the cisplatin 1,2-intrastrand d(GpG) cross-link. HMGB4, a new member of the mammalian HMGB protein family expressed preferentially in the testis, was generated recombinantly, and its interactions with cisplatin-modified DNA were investigated in vitro. The binding affinities of the two individual DNA-binding domains of HMGB4 to DNA carrying a cisplatin 1,2-intrastrand d(GpG) cross-link are weaker than those of the DNA-binding domains of HMGB1. Full-length HMGB4, however, has a 28-fold stronger binding affinity (K(d) = 4.35 nM) for the platinated adduct compared to that of HMGB1 (K(d) = 120 nM), presumably because the former lacks a C-terminal acidic tail. The residue Phe37 plays a critical role in stabilizing the binding complex of HMGB4 with the cisplatin-modified DNA, as it does for HMGB1. Hydroxyl radical footprinting analysis of the HMGB4/platinated DNA complex reveals a footprinting pattern very different from that of HMGB1, however, revealing very little binding asymmetry with respect to the platinated lesion. An in vitro repair assay revealed that HMGB4, at 1 μM, interferes with repair of cisplatin 1,2-intrastrand cross-link damage by >90% compared to control, whereas HMGB1 at the same concentration inhibits repair by 45%. This repair inhibition capability is highly dependent on both the binding affinity and the size of the proteins. The putative role of HMGB4 in the mechanism of action of cisplatin, and especially its potential relevance to the hypersensitivity of testicular germ cell tumors to cisplatin, are discussed.
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Affiliation(s)
- Semi Park
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
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Olivova R, Kasparkova J, Vrana O, Vojtiskova M, Suchankova T, Novakova O, He W, Guo Z, Brabec V. Unique DNA Binding Mode of Antitumor Trinuclear Tridentate Platinum(II) Compound. Mol Pharm 2011; 8:2368-78. [DOI: 10.1021/mp200298g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Radana Olivova
- Department of Biophysics, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146 Olomouc,
Czech Republic
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Jana Kasparkova
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Oldrich Vrana
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Marie Vojtiskova
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Tereza Suchankova
- Department of Biophysics, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146 Olomouc,
Czech Republic
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Olga Novakova
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Weijiang He
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Zijian Guo
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Viktor Brabec
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
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14
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Kostrhunova H, Malina J, Pickard AJ, Stepankova J, Vojtiskova M, Kasparkova J, Muchova T, Rohlfing ML, Bierbach U, Brabec V. Replacement of a thiourea with an amidine group in a monofunctional platinum-acridine antitumor agent. Effect on DNA interactions, DNA adduct recognition and repair. Mol Pharm 2011; 8:1941-54. [PMID: 21806015 DOI: 10.1021/mp200309x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A combination of biophysical, biochemical, and computational techniques was used to delineate mechanistic differences between the platinum-acridine hybrid agent [PtCl(en)(L)](NO(3))(2) (complex 1, en = ethane-1,2-diamine, L = 1-[2-(acridin-9-ylamino)ethyl]-1,3-dimethylthiourea) and a considerably more potent second-generation analogue containing L' = N-[2-(acridin-9-ylamino)ethyl]-N-methylpropionamidine (complex 2). Calculations at the density functional theory level provide a rationale for the binding preference of both complexes for guanine-N7 and the relatively high level of adenine adducts observed for compound 1. A significant rate enhancement is observed for binding of the amidine-based complex 2 with DNA compared with the thiourea-based prototype 1. Studies conducted with chemical probes and on the bending and unwinding of model duplex DNA suggest that adducts of complex 2 perturb B-form DNA more severely than complex 1, however, without denaturing the double strand and significantly less than cisplatin. Circular and linear dichroism spectroscopies and viscosity measurements suggest that subtle differences exist between the intercalation modes and adduct geometries of the two complexes. The adducts formed by complex 2 most efficiently inhibit transcription of the damaged DNA by RNA polymerase II. Not only do complexes 1 and 2 cause less distortion to DNA than cisplatin, they also do not compromise the thermodynamic stability of the modified duplex. This leads to a decreased or negligible affinity of HMG domain proteins for the adducts formed by either Pt-acridine complex. In a DNA repair synthesis assay the lesions formed by complex 2 were repaired less efficiently than those formed by complex 1. These significant differences in DNA adduct formation, structure, and recognition between the two acridine complexes and cisplatin help to elucidate why compound 2 is highly active in cisplatin-resistant, repair proficient cancer cell lines.
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Affiliation(s)
- Hana Kostrhunova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, vvi Kralovopolska 135, CZ-61265 Brno, Czech Republic
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15
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Park S, Lippard SJ. Redox state-dependent interaction of HMGB1 and cisplatin-modified DNA. Biochemistry 2011; 50:2567-74. [PMID: 21355578 DOI: 10.1021/bi2000214] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
HMGB1, one of the most abundant nuclear proteins, has a strong binding affinity for cisplatin-modified DNA. It has been proposed that HMGB1 enhances the anticancer efficacy of cisplatin by shielding platinated DNA lesions from repair. Two cysteine residues in HMGB1 domain A form a reversible disulfide bond under mildly oxidizing conditions. The reduced domain A protein binds to a 25-bp DNA probe containing a central 1,2-d(GpG) intrastrand cross-link, the major platinum-DNA adduct, with a 10-fold greater binding affinity than the oxidized domain A. The binding affinities of singly and doubly mutated HMGB1 domain A, respectively deficient in one or both cysteine residues that form the disulfide bond, are unaffected by changes in external redox conditions. The redox-dependent nature of the binding of HMGB1 domain A to cisplatin-modified DNA suggests that formation of the intradomain disulfide bond induces a conformational change that disfavors binding to cisplatin-modified DNA. Hydroxyl radical footprinting analyses of wild-type domain A bound to platinated DNA under different redox conditions revealed identical cleavage patterns, implying that the asymmetric binding mode of the protein across from the platinated lesion is conserved irrespective of the redox state. The results of this study reveal that the cellular redox environment can influence the interaction of HMGB1 with the platinated DNA and suggest that the redox state of the A domain is a potential factor in regulating the role of the protein in modulating the activity of cisplatin as an anticancer drug.
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Affiliation(s)
- Semi Park
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
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Mechanistic insights into antitumor effects of new dinuclear cis PtII complexes containing aromatic linkers. Biochem Pharmacol 2010; 80:344-51. [DOI: 10.1016/j.bcp.2010.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Revised: 04/07/2010] [Accepted: 04/09/2010] [Indexed: 11/17/2022]
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17
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Arnesano F, Natile G. Mechanistic insight into the cellular uptake and processing of cisplatin 30 years after its approval by FDA. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2009.01.028] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Sharma A, Ramanjaneyulu A, Ray R, Rajeswari MR. Involvement of high mobility group B proteins in cisplatin-induced cytotoxicity in squamous cell carcinoma of skin. DNA Cell Biol 2009; 28:311-8. [PMID: 19435426 DOI: 10.1089/dna.2009.0851] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cis-diamminedichloroplatinum (II) (cisplatin) is a well-known anticancer drug with high potency and efficacy against various types of human cancers. Although it is widely accepted that the mechanism of cisplatin action is via apoptosis, there is enough evidence to support that cisplatin-induced cell death also occurs by other nonapoptotic pathways. Nonhistone, high mobility group (HMG) proteins are known to bind cisplatin-damaged DNA, and we studied their expression during cisplatin-induced cell death using immunohistochemistry, Western blot, and RT-PCR. Results show that the cell death is primarily apoptotic during initial stages of cisplatin treatment of skin tumors, and there is only marginal increase in high mobility group B (HMGB) levels, indicating that HMGB are still bound to nucleus. However, extended treatment of skin tumors with cisplatin caused necrosis and showed significantly increased levels of HMGB, which suggests that HMGB thus released from nuclei act as cytokine and trigger inflammatory response leading to necrosis. Present results clearly indicate a strong association between HMGB proteins and cisplatin-induced cell death that is dominantly apoptotic or necrotic depending on the duration of cisplatin exposure. Because of their important implication in the outcome of cancer chemotherapy, HMGB proteins can be interesting therapeutic targets.
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Affiliation(s)
- Ashok Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
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Dans PD, Coitiño EL. Density Functional Theory Characterization and Descriptive Analysis of Cisplatin and Related Compounds. J Chem Inf Model 2009; 49:1407-19. [DOI: 10.1021/ci800421w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pablo D. Dans
- Laboratorio de Química Teórica y Computacional (LQTC), Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República (UdelaR), Iguá 4225, 11400 Montevideo, Uruguay
| | - E. Laura Coitiño
- Laboratorio de Química Teórica y Computacional (LQTC), Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República (UdelaR), Iguá 4225, 11400 Montevideo, Uruguay
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20
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Abstract
Cisplatin, carboplatin, and oxaliplatin are three FDA-approved members of the platinum anticancer drug family. These compounds induce apoptosis in tumor cells by binding to nuclear DNA, forming a variety of structural adducts and triggering cellular responses, one of which is the inhibition of transcription. In this report we present (i) a detailed review of the structural investigations of various Pt-DNA adducts and the effects of these lesions on global DNA geometry; (ii) research detailing inhibition of cellular transcription by Pt-DNA adducts; and (iii) a mechanistic analysis of how DNA structural distortions induced by platinum damage may inhibit RNA synthesis in vivo. A thorough understanding of the molecular mechanism of action of platinum antitumor agents will aid in the development of new compounds in the family.
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Affiliation(s)
- Ryan C. Todd
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Stephen J. Lippard
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
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21
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Karotki AV, Vasák M. Interaction of metallothionein-2 with platinum-modified 5'-guanosine monophosphate and DNA. Biochemistry 2008; 47:10961-9. [PMID: 18803406 DOI: 10.1021/bi801253x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human metallothioneins (MTs), a family of cysteine- and metal-rich metalloproteins, play an important role in the acquired resistance to platinum drugs. MTs occur in the cytosol and the nucleus of the cells and sequester platinum drugs through interaction with their zinc-thiolate clusters. Herein, we investigate the ability of human Zn 7MT-2 to form DNA-Pt-MT cross-links using the cisplatin- and transplatin-modified plasmid DNA pSP73. Immunochemical analysis of MT-2 showed that the monofunctional platinum-DNA adducts formed DNA- cis/ trans-Pt-MT cross-links and that platinated MT-2 was released from the DNA- trans-Pt-MT cross-links with time. The DNA- cis/ trans-Pt-MT cross-links were also formed in the presence of 2 mM glutathione, a strong S-donor ligand. Independently, we used 5'-guanosine monophosphate (5'-GMP) platinated at the N7 position as a model of monofunctional platinum-DNA adducts. Comparison of reaction kinetics revealed that the formation of ternary complexes between Zn 7MT-2 and cis-Pt-GMP was faster than that of the trans isomer. The analysis of the reaction products with time showed that while the formation of ternary GMP- trans-Pt-MT complex(es) is accompanied by 5'-GMP release, a stable ternary GMP- cis-Pt-MT complex is formed. In the latter complex, a fast initial formation of two Pt-S bonds was followed by a slow formation of an additional Pt-S bond yielding an unusual Pt(II)S 3N coordination with N7-GMP as the only N-donor ligand. The ejection of negligible zinc from the zinc-thiolate clusters implies the initial formation of Zn-(mu-SCys)-Pt bridges involving the terminal thiolate ligands. The biological implications of these studies are discussed.
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Affiliation(s)
- Andrei V Karotki
- Department of Biochemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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HMG-box domain stimulation of RAG1/2 cleavage activity is metal ion dependent. BMC Mol Biol 2008; 9:32. [PMID: 18380906 PMCID: PMC2324110 DOI: 10.1186/1471-2199-9-32] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Accepted: 04/01/2008] [Indexed: 01/15/2023] Open
Abstract
Background RAG1 and RAG2 initiate V(D)J recombination by assembling a synaptic complex with a pair of antigen receptor gene segments through interactions with their flanking recombination signal sequence (RSS), and then introducing a DNA double-strand break at each RSS, separating it from the adjacent coding segment. While the RAG proteins are sufficient to mediate RSS binding and cleavage in vitro, these activities are stimulated by the architectural DNA binding and bending factors HMGB1 and HMGB2. Two previous studies (Bergeron et al., 2005, and Dai et al., 2005) came to different conclusions regarding whether only one of the two DNA binding domains of HMGB1 is sufficient to stimulate RAG-mediated binding and cleavage of naked DNA in vitro. Here we test whether this apparent discrepancy is attributed to the choice of divalent metal ion and the concentration of HMGB1 used in the cleavage reaction. Results We show here that single HMG-box domains of HMGB1 stimulate RAG-mediated RSS cleavage in a concentration-dependent manner in the presence of Mn2+, but not Mg2+. Interestingly, the inability of a single HMG-box domain to stimulate RAG-mediated RSS cleavage in Mg2+ is overcome by the addition of partner RSS to promote synapsis. Furthermore, we show that mutant forms of HMGB1 which otherwise fail to stimulate RAG-mediated RSS cleavage in Mg2+ can be substantially rescued when Mg2+ is replaced with Mn2+. Conclusion The conflicting data published previously in two different laboratories can be substantially explained by the choice of divalent metal ion and abundance of HMGB1 in the cleavage reaction. The observation that single HMG-box domains can promote RAG-mediated 23-RSS cleavage in Mg2+ in the presence, but not absence, of partner RSS suggests that synaptic complex assembly in vitro is associated with conformational changes that alter how the RAG and/or HMGB1 proteins bind and bend DNA in a manner that functionally replaces the role of one of the HMG-box domains in RAG-HMGB1 complexes assembled on a single RSS.
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Kasparkova J, Vojtiskova M, Natile G, Brabec V. Unique Properties of DNA Interstrand Cross-Links of Antitumor Oxaliplatin and the Effect of Chirality of the Carrier Ligand. Chemistry 2008; 14:1330-41. [DOI: 10.1002/chem.200701352] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Ahmed AA, Mills AD, Ibrahim AE, Temple J, Blenkiron C, Vias M, Massie CE, Iyer NG, McGeoch A, Crawford R, Nicke B, Downward J, Swanton C, Bell SD, Earl HM, Laskey RA, Caldas C, Brenton JD. The extracellular matrix protein TGFBI induces microtubule stabilization and sensitizes ovarian cancers to paclitaxel. Cancer Cell 2007; 12:514-27. [PMID: 18068629 PMCID: PMC2148463 DOI: 10.1016/j.ccr.2007.11.014] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 08/17/2007] [Accepted: 11/19/2007] [Indexed: 11/29/2022]
Abstract
The extracellular matrix (ECM) can induce chemotherapy resistance via AKT-mediated inhibition of apoptosis. Here, we show that loss of the ECM protein TGFBI (transforming growth factor beta induced) is sufficient to induce specific resistance to paclitaxel and mitotic spindle abnormalities in ovarian cancer cells. Paclitaxel-resistant cells treated with recombinant TGFBI protein show integrin-dependent restoration of paclitaxel sensitivity via FAK- and Rho-dependent stabilization of microtubules. Immunohistochemical staining for TGFBI in paclitaxel-treated ovarian cancers from a prospective clinical trial showed that morphological changes of paclitaxel-induced cytotoxicity were restricted to areas of strong expression of TGFBI. These data show that ECM can mediate taxane sensitivity by modulating microtubule stability.
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Affiliation(s)
- Ahmed Ashour Ahmed
- Functional Genomics of Drug Resistance Laboratory, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
- Gynaecological Oncology Regional Centre, Box 242, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge CB2 0QQ, UK
| | - Anthony D. Mills
- MRC Cancer Cell Unit, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Ashraf E.K. Ibrahim
- Functional Genomics of Drug Resistance Laboratory, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
| | - Jillian Temple
- Functional Genomics of Drug Resistance Laboratory, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Cherie Blenkiron
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Maria Vias
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Charlie E. Massie
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - N. Gopalakrishna Iyer
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Adam McGeoch
- MRC Cancer Cell Unit, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Robin Crawford
- Gynaecological Oncology Regional Centre, Box 242, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge CB2 0QQ, UK
| | - Barbara Nicke
- Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3PX, UK
| | - Julian Downward
- Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3PX, UK
| | - Charles Swanton
- Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3PX, UK
| | - Stephen D. Bell
- MRC Cancer Cell Unit, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Helena M. Earl
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Ronald A. Laskey
- MRC Cancer Cell Unit, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - Carlos Caldas
- Breast Cancer Functional Genomics Laboratory, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
| | - James D. Brenton
- Functional Genomics of Drug Resistance Laboratory, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
- Department of Oncology, Hutchison/MRC Research Centre, Hills Road, Cambridge, CB2 0XZ, UK
- Corresponding author
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25
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Affiliation(s)
- Yongwon Jung
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
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26
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Lehoczký P, McHugh PJ, Chovanec M. DNA interstrand cross-link repair in Saccharomyces cerevisiae. FEMS Microbiol Rev 2006; 31:109-33. [PMID: 17096663 DOI: 10.1111/j.1574-6976.2006.00046.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
DNA interstrand cross-links (ICL) present a formidable challenge to the cellular DNA repair apparatus. For Escherichia coli, a pathway which combines nucleotide excision repair (NER) and homologous recombination repair (HRR) to eliminate ICL has been characterized in detail, both genetically and biochemically. Mechanisms of ICL repair in eukaryotes have proved more difficult to define, primarily as a result of the fact that several pathways appear compete for ICL repair intermediates, and also because these competing activities are regulated in the cell cycle. The budding yeast Saccharomyces cerevisiae has proven a powerful tool for dissecting ICL repair. Important roles for NER, HRR and postreplication/translesion synthesis pathways have all been identified. Here we review, with reference to similarities and differences in higher eukaryotes, what has been discovered to date concerning ICL repair in this simple eukaryote.
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Affiliation(s)
- Peter Lehoczký
- Department of Molecular Genetics, Cancer Research Institute, Bratislava, Slovak Republic
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27
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Cini R, Tamasi G, Defazio S, Corsini M, Berrettini F, Cavaglioni A. Unusual hetero-atomic RhSCNSb(Rh) co-ordination ring: Synthesis and X-ray structure of [Rh(N1,S2-2-thiopyrimidinato)2(N1(Sb),S2(Rh)-2-thiopyrimidinato){Sb(C6H5)3}] and long time sought structure of mer-[RhCl3{Sb(C6H5)3}3]. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Marini V, Christofis P, Novakova O, Kasparkova J, Farrell N, Brabec V. Conformation, protein recognition and repair of DNA interstrand and intrastrand cross-links of antitumor trans-[PtCl2(NH3)(thiazole)]. Nucleic Acids Res 2005; 33:5819-28. [PMID: 16237123 PMCID: PMC1258167 DOI: 10.1093/nar/gki884] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2005] [Revised: 09/02/2005] [Accepted: 09/20/2005] [Indexed: 11/21/2022] Open
Abstract
Replacement of one ammine in clinically ineffective trans-[PtCl2(NH3)2] (transplatin) by a planar N-heterocycle, thiazole, results in significantly enhanced cytotoxicity. Unlike 'classical' cisplatin {cis-[PtCl2(NH3)2]} or transplatin, modification of DNA by this prototypical cytotoxic transplatinum complex trans-[PtCl2(NH3)(thiazole)] (trans-PtTz) leads to monofunctional and bifunctional intra or interstrand adducts in roughly equal proportions. DNA fragments containing site-specific bifunctional DNA adducts of trans-PtTz were prepared. The structural distortions induced in DNA by these adducts and their consequences for high-mobility group protein recognition, DNA polymerization and nucleotide excision repair were assessed in cell-free media by biochemical methods. Whereas monofunctional adducts of trans-PtTz behave similar to the major intrastrand adduct of cisplatin [J. Kasparkova, O. Novakova, N. Farrell and V. Brabec (2003) Biochemistry, 42, 792-800], bifunctional cross-links behave distinctly differently. The results suggest that the multiple DNA lesions available to trans-planaramine complexes may all contribute substantially to their cytotoxicity so that the overall drug cytotoxicity could be the sum of the contributions of each of these adducts. However, acquisition of drug resistance could be a relatively rare event, since it would have to entail resistance to or tolerance of multiple, structurally dissimilar DNA lesions.
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Affiliation(s)
- Victoria Marini
- Institute of Biophysics, Academy of Sciences of the Czech RepublicCZ-61265 Brno, Czech Republic
- Department of Chemistry, Virginia Commonwealth UniversityRichmond, VA 23284-2006, USA
| | - Petros Christofis
- Institute of Biophysics, Academy of Sciences of the Czech RepublicCZ-61265 Brno, Czech Republic
- Department of Chemistry, Virginia Commonwealth UniversityRichmond, VA 23284-2006, USA
| | - Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech RepublicCZ-61265 Brno, Czech Republic
- Department of Chemistry, Virginia Commonwealth UniversityRichmond, VA 23284-2006, USA
| | - Jana Kasparkova
- Institute of Biophysics, Academy of Sciences of the Czech RepublicCZ-61265 Brno, Czech Republic
- Department of Chemistry, Virginia Commonwealth UniversityRichmond, VA 23284-2006, USA
| | - Nicholas Farrell
- Department of Chemistry, Virginia Commonwealth UniversityRichmond, VA 23284-2006, USA
| | - Viktor Brabec
- To whom correspondence should be addressed. Tel: +42 5 41517148; Fax: +42 5 41240499;
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Bergeron S, Madathiparambil T, Swanson PC. Both high mobility group (HMG)-boxes and the acidic tail of HMGB1 regulate recombination-activating gene (RAG)-mediated recombination signal synapsis and cleavage in vitro. J Biol Chem 2005; 280:31314-24. [PMID: 15994314 PMCID: PMC5992625 DOI: 10.1074/jbc.m503063200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
RAG-1 and RAG-2 initiate V(D)J recombination through synapsis and cleavage of a 12/23 pair of V(D)J recombination signal sequences (RSS). RAG-RSS complex assembly and activity in vitro is promoted by high mobility group proteins of the "HMG-box" family, exemplified by HMGB1. How HMGB1 stimulates the DNA binding and cleavage activity of the RAG complex remains unclear. HMGB1 contains two homologous HMG-box DNA binding domains, termed A and B, linked by a stretch of basic residues to a highly acidic C-terminal tail. To identify determinants of HMGB1 required for stimulation of RAG-mediated RSS binding and cleavage, we prepared an extensive panel of mutant HMGB1 proteins and tested their ability to augment RAG-mediated RSS binding and cleavage activity. Using a combination of mobility shift and in-gel cleavage assays, we find that HMGB1 promotes RAG-mediated cleavage largely through the activity of box B, but optimal stimulation requires a functional A box tethered in the correct orientation. Box A or B mutants fail to promote RAG synaptic complex formation, but this defect is alleviated when the acidic tail is removed from these mutants.
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Affiliation(s)
| | | | - Patrick C. Swanson
- An American Cancer Society Research Scholar. To whom correspondence should be addressed: Dept. of Medical Microbiology and Immunology, Creighton University Medical Center, 2500 California Plaza, Omaha, NE, 68178. Tel.: 402-280-2716; Fax: 402-280-1875;
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Novakova O, Kasparkova J, Malina J, Natile G, Brabec V. DNA-protein cross-linking by trans-[PtCl(2)(E-iminoether)(2)]. A concept for activation of the trans geometry in platinum antitumor complexes. Nucleic Acids Res 2004; 31:6450-60. [PMID: 14602903 PMCID: PMC275558 DOI: 10.1093/nar/gkg863] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structure-pharmacological activity relationships generally accepted for antitumor platinum compounds stressed the necessity for the cis-[PtX(2)(amine)(2)] structure while the trans-[PtX(2)(amine)(2)] structure was considered inactive. However, more recently, several trans-platinum complexes have been identified which are potently toxic, antitumor-active and demonstrate activity distinct from that of conventional cisplatin (cis-[PtCl(2)(NH(3))(2)]). We have shown in the previous report that the replacement of ammine ligands by iminoether in transplatin (trans-[PtCl(2)(NH(3))(2)]) results in a marked enhancement of its cytotoxicity so that it is more cytotoxic than its cis congener and exhibits significant antitumor activity, including activity in cisplatin-resistant tumor cells. In addition, we have also shown previously that this new trans compound (trans-[PtCl(2)(E-iminoether)(2)]) forms mainly monofunctional adducts at guanine residues on DNA, which is generally accepted to be the cellular target of platinum drugs. In order to shed light on the mechanism underlying the antitumor activity of trans-[PtCl(2)(E-iminoether)(2)] we examined oligodeoxyribonucleotide duplexes containing a single, site-specific, monofunctional adduct of this transplatin analog by the methods of molecular biophysics. The results indicate that major monofunctional adducts of trans-[PtCl(2)(E-iminoether)(2)] locally distort DNA, bend the DNA axis by 21 degrees toward the minor groove, are not recognized by HMGB1 proteins and are readily removed from DNA by nucleotide excision repair (NER). In addition, the monofunctional adducts of trans-[PtCl(2)(E-iminoether)(2)] readily cross-link proteins, which markedly enhances the efficiency of this adduct to terminate DNA polymerization by DNA polymerases in vitro and to inhibit removal of this adduct from DNA by NER. It is suggested that DNA-protein ternary cross-links produced by trans-[PtCl(2)(E-iminoether)(2)] could persist considerably longer than the non-cross-linked monofunctional adducts, which would potentiate toxicity of this antitumor platinum compound toward tumor cells sensitive to this drug. Thus, trans-[PtCl(2)(E-iminoether)(2)] represents a quite new class of platinum antitumor drugs in which activation of trans geometry is associated with an increased efficiency to form DNA-protein ternary cross-links thereby acting by a different mechanism from 'classical' cisplatin and its analogs.
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Affiliation(s)
- Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, CZ-61265 Brno
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