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Ferraro MG, Piccolo M, Misso G, Santamaria R, Irace C. Bioactivity and Development of Small Non-Platinum Metal-Based Chemotherapeutics. Pharmaceutics 2022; 14:pharmaceutics14050954. [PMID: 35631543 PMCID: PMC9147010 DOI: 10.3390/pharmaceutics14050954] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 02/04/2023] Open
Abstract
Countless expectations converge in the multidisciplinary endeavour for the search and development of effective and safe drugs in fighting cancer. Although they still embody a minority of the pharmacological agents currently in clinical use, metal-based complexes have great yet unexplored potential, which probably hides forthcoming anticancer drugs. Following the historical success of cisplatin and congeners, but also taking advantage of conventional chemotherapy limitations that emerged with applications in the clinic, the design and development of non-platinum metal-based chemotherapeutics, either as drugs or prodrugs, represents a rapidly evolving field wherein candidate compounds can be fine-tuned to access interactions with druggable biological targets. Moving in this direction, over the last few decades platinum family metals, e.g., ruthenium and palladium, have been largely proposed. Indeed, transition metals and molecular platforms where they originate are endowed with unique chemical and biological features based on, but not limited to, redox activity and coordination geometries, as well as ligand selection (including their inherent reactivity and bioactivity). Herein, current applications and progress in metal-based chemoth are reviewed. Converging on the recent literature, new attractive chemotherapeutics based on transition metals other than platinum—and their bioactivity and mechanisms of action—are examined and discussed. A special focus is committed to anticancer agents based on ruthenium, palladium, rhodium, and iridium, but also to gold derivatives, for which more experimental data are nowadays available. Next to platinum-based agents, ruthenium-based candidate drugs were the first to reach the stage of clinical evaluation in humans, opening new scenarios for the development of alternative chemotherapeutic options to treat cancer.
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Affiliation(s)
- Maria Grazia Ferraro
- BioChemLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy; (M.G.F.); (M.P.); (R.S.)
| | - Marialuisa Piccolo
- BioChemLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy; (M.G.F.); (M.P.); (R.S.)
| | - Gabriella Misso
- Department of Precision Medicine, School of Medicine and Surgery, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
- Correspondence: (G.M.); (C.I.)
| | - Rita Santamaria
- BioChemLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy; (M.G.F.); (M.P.); (R.S.)
| | - Carlo Irace
- BioChemLab, Department of Pharmacy, School of Medicine and Surgery, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy; (M.G.F.); (M.P.); (R.S.)
- Correspondence: (G.M.); (C.I.)
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Targeting drug delivery system for platinum(Ⅳ)-Based antitumor complexes. Eur J Med Chem 2020; 194:112229. [PMID: 32222677 DOI: 10.1016/j.ejmech.2020.112229] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/04/2020] [Accepted: 03/10/2020] [Indexed: 12/22/2022]
Abstract
Classical platinum(II) anticancer agents are widely-used chemotherapeutic drugs in the clinic against a range of cancers. However, severe systemic toxicity and drug resistance have become the main obstacles which limit their application and effectiveness. Because divalent cisplatin analogues are easily destroyed in vivo, their bioavailability is low and no selective to tumor tissues. The platinum(IV) prodrugs are attractive compounds for cancer treatment because they have great advantages, e.g., higher stability in biological media, aqueous solubility and no cross-resistance with cisplatin, which may become the next generation of platinum anticancer drugs. In addition, platinum(IV) drugs could be taken orally, which could be more acceptable to cancer patients, breaking the current situation that platinum(II) drugs can only be given by injection. The coupling of platinum(IV) complexes with tumor targeting groups avoids the disadvantages such as instability in blood, irreversible binding to plasma proteins, rapid renal clearance, and non-specific distribution in normal tissues. Because of the above advantages, the combination of platinum complexes and tumor targeting groups has become the hottest field in the research and development of new platinum drugs. These approaches can be roughly categorized into two groups: active and passive targeted strategies. This review concentrates on various targeting and delivery strategies for platinum(IV) complexes to improve the efficacy and reduce the side effects of platinum-based anticancer drugs. We have made a summary of the related articles on platinum(IV) targeted delivery in recent years. We believe the results of the studies described in this review will provide new ideas and strategies for the development of platinum drugs.
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Yao X, Cheng X, Zhang L, Yu H, Bao J, Guan H, Lu R. Punicalagin from pomegranate promotes human papillary thyroid carcinoma BCPAP cell death by triggering ATM-mediated DNA damage response. Nutr Res 2017; 47:63-71. [PMID: 29241579 DOI: 10.1016/j.nutres.2017.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 02/04/2023]
Abstract
Punicalagin (PUN), a component derived from pomegranate, is well known for its anticancer activity. Our previous work revealed that PUN induces autophagic cell death in papillary thyroid carcinoma cells. We hypothesized that PUN triggers DNA damage associated with cell death because DNA damage was reported as an inducer of autophagy. Our results showed that PUN treatment caused DNA breaks as evidenced by the significant enhancement in the phosphorylation of H2A.X. However, reactive oxygen species and DNA conformational alteration, 2 common inducing factors in DNA damage, were not involved in PUN-induced DNA damage. The phosphorylation of ataxia-telangiectasia mutated gene-encoded protein (ATM) but not ataxia telangiectasia and Rad3-related protein (ATR) was up-regulated in a time- and dosage-dependent manner after PUN treatment. KU-55933, an inhibitor of ATM, inhibited the phosphorylation of ATM induced by PUN and reversed the decreased cell viability caused by PUN. Thus, we demonstrated that PUN induces cell death of papillary thyroid carcinoma cells by triggering ATM-mediated DNA damage response, which provided novel mechanisms and potential targets for the better understanding of the anticancer actions of PUN.
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Affiliation(s)
- Xin Yao
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China.
| | - Xian Cheng
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Li Zhang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China; State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu, China.
| | - Huixin Yu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Jiandong Bao
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Haixia Guan
- Department of Endocrinology and Metabolism and Institute of Endocrinology, the First Hospital of China Medical University, Shenyang, Liaoning, China.
| | - Rongrong Lu
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China.
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Gantchev TG, Petkov PS, Hunting DJ. Conformational rearrangement of 1,2-d(GG) intrastrand cis-diammineplatinum crosslinked DNA is driven by counter-ion penetration within the minor groove of the modified site. J Mol Model 2017; 23:278. [PMID: 28913561 DOI: 10.1007/s00894-017-3445-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 08/25/2017] [Indexed: 11/27/2022]
Abstract
The major structural aberrations of DNA induced by a cis-diammineplatinum (II) 1,2-d(GG) intrastrand cross-link (CPT) have been known for decades. To gain deeper insights into the structural dynamics of the sequence-dependent DNA distortions adjacent to the CPT adduct, we employed molecular modeling and molecular dynamics (MD) simulations. The structural dynamics of native (N-DNA) and cisPt 1,2-d(GG) crosslinked (CPT-DNA) in the form of symmetric 36 nt d(G2T15G*G*T15G2)●C2A15CCA15C2) oligonucleotide duplexes is compared. The selected sequence context enabled tracking of the origin of the DNA axis curvature at the YpR flexible points (N-DNA), the enhancement of axis bending, and further distortions due to steric/electrostatic perturbations arising from the CPT-crosslink. In addition to the known structural distortions of CPT-DNA: helix bend towards the major groove; local helix unwinding; high roll angle between cross-linked guanine bases; and adoption of A-form DNA on the 5'-side of the CPT-crosslink (TpG junction); our results show the existence of a singular irreversible and reproducible conformational rearrangement, not previously observed, resulting in two stable CPT-DNA1 and CPT-DNA2 conformers. The CPT-DNA2 conformation presents an enhanced DNA axis bend and a wider and shallower minor grove with increased solvent accessibility within the modified site. It is concluded that the polymorphous (unstable) DNA environment near the cisPt 1,2-d(GG) unit in synergy with specific dynamic events, such as prolonged minor groove retention of particular Na+ ions and water redistribution within the d(TG*G*T) site, together with the formation of extra and more stable H-bonds between Pt(NH3)2 amines and neighboring nucleotides, are cooperatively responsible for the initiation of the conformational rearrangement leading to the CPT-DNA2 conformer, which, surprisingly, closely resembles the HMGB1-bound CPT-DNA structure. Graphical abstract Superimposed averaged structures of normal (N-DNA, green) and cisplatin intrastrand cross-linked (CPT-DNA, orange). Global DNA axes: N-DNA (blue beads); CPT-DNA (red beads); PT (yellow sphere); crosslinked dGs viewed from the minor groove (bold).
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Affiliation(s)
- Tsvetan G Gantchev
- Department of Nuclear Medicine & Radiobiology, Faculty of Medicine, Université de Sherbrooke, Sherbrooke, QC, J1H 5N4, Canada. .,"Roumen Tsanev" Institute of Molecular Biology, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria.
| | - Peicho St Petkov
- Department of Atomic Physics, Faculty of Physics, Sofia University, 5 James Bourchier Blvd., 1164, Sofia, Bulgaria
| | - Darel J Hunting
- Department of Nuclear Medicine & Radiobiology, Faculty of Medicine, Université de Sherbrooke, Sherbrooke, QC, J1H 5N4, Canada
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Zhang L, Cheng X, Gao Y, Bao J, Guan H, Lu R, Yu H, Xu Q, Sun Y. Induction of ROS-independent DNA damage by curcumin leads to G2/M cell cycle arrest and apoptosis in human papillary thyroid carcinoma BCPAP cells. Food Funct 2016; 7:315-25. [PMID: 26442630 DOI: 10.1039/c5fo00681c] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Previously we found that curcumin, the active constituent of dietary spice turmeric, showed potent inhibitory effects on the cell growth of thyroid cancer cells. However, the detailed anti-cancer mechanism of curcumin is still unknown. In this study, we have reported that curcumin induces significant DNA damage in human papillary thyroid carcinoma BCPAP cells in a dose-dependent manner as evidenced by the upregulated phosphorylation of H2A.X at Ser139, which was further confirmed by the long tails in the comet assay and the increase in the number of TUNEL-positive cells. Subsequently, curcumin treatment caused a significant accumulation of cells at the G2/M phase that eventually resulted in a caspase-dependent apoptosis in BCPAP cells. DNA agarose gel electrophoresis revealed that curcumin-induced DNA damage in BCPAP cells was independent of DNA conformational change. Pretreatment with reactive oxygen species (ROS) scavengers failed to block the phosphorylation of H2A.X, suggesting the non-involvement of ROS in curcumin-mediated DNA damage. Interestingly, ATM/ATR activation by curcumin induced phosphorylation of Chk2 (Thr68) followed by that of Cdc25C (Ser216) and Cdc2 (Tyr15), and Cyclin B1 accumulation. In addition, the ATM-specific inhibitor KU-55933 reversed curcumin-induced phosphorylation of H2A.X. These results collectively show that curcumin treatment induced the DNA damage response via triggering an ATM-activated Chk2-Cdc25C-Cdc2 signaling pathway. These observations provide novel mechanisms and potential targets for the better understanding of the anti-cancer mechanisms of curcumin.
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Affiliation(s)
- Li Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu, China. and Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Xian Cheng
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Yanyan Gao
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Jiandong Bao
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Haixia Guan
- Department of Endocrinology & Metabolism and Institute of Endocrinology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Rongrong Lu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Huixin Yu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China.
| | - Qiang Xu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu, China.
| | - Yang Sun
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu, China.
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6
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Fong CW. Platinum based radiochemotherapies: Free radical mechanisms and radiotherapy sensitizers. Free Radic Biol Med 2016; 99:99-109. [PMID: 27417937 DOI: 10.1016/j.freeradbiomed.2016.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 06/18/2016] [Accepted: 07/08/2016] [Indexed: 12/22/2022]
Abstract
The radiosensitizing ability of Pt drugs can in the first instance be predicted based on the ease that they undergo activation by electron attachment accompanied by structural modification prior to forming Pt-DNA adducts. Unlike cisplatin, carboplatin and nedaplatin, oxaliplatin does not undergo a facile dissociative electron transfer reaction when an electron is attached. However, oxaliplatin undergoes a facile nucleophilic assisted proton coupled electron transfer (NAPCET), which may be key element of the success of FOLFOX radiochemotherapy against certain cancers. Under acidic conditions, oxaliplatin is a superior radiosensitizer to cisplatin or carboplatin, in the presence of nucleophiles such as water, chloride ions or thiols. Oxaliplatin may also be activated as a platinating agent and radiosensitizer by a minor hydrogen radical free radical mechanism as well as the more dominant NAPCET mechanism. The radiosensitizing synergism that is shown when oxaliplatin is combined with 5-fluorouracil can be due to the formation of a π complex between the two drugs, which is more potent under acidic conditions. These factors have a bearing on Pt based chemotherapy clinical regimes as well as clinical radiochemotherapy regimes, and could be a basis for optimizing how such drug schedules are administered.
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7
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Yang J, Chen J, Li Z. Structural Basis for the Structure–Activity Behaviour of Oxaliplatin and its Enantiomeric Analogues: A Molecular Dynamics Study of Platinum-DNA Intrastrand Crosslink Adducts. Aust J Chem 2016. [DOI: 10.1071/ch15624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The discrimination of Pt-GG adducts by mismatch repair proteins, DNA damage-recognition proteins, and translation DNA polymerases was thought to be vital in determining the toxicity, efficacy, and mutagenicity of platinum anti-tumour drugs. Studies on cis-diammine-Pt-GG (from cisplatin and carboplatin) and trans-R,R-diaminocyclohexane (DACH)-Pt-GG indicated that these proteins recognized the differences in conformation and conformational dynamics of Pt-DNA complexes. However, the structural basis of enantiomeric DACH-Pt-GG forms is unclear. Molecular dynamics simulations results presented here reveal that the conformational dynamics between trans-R,R-DACH-Pt-GG, trans-S,S-DACH-Pt-GG, cis-DACH-Pt-GG and undamaged DNA are distinct and depend on the chirality of DACH though their major conformations are similar. Trans-DACH-Pt was found to be energetically favoured over cis-DACH-Pt to form DNA adducts. Moreover, oxaliplatin and its cis-DACH analogues were found to preferentially form hydrogen bonds on the 3′ side of the Pt-GG adduct, whereas the S,S-DACH-Pt preferred the 5′ side. A three-centre hydrogen bond formed between cis1-DACH-Pt and DNA was observed, and the differences in hydrogen bond formation are highly correlated with differences in DNA conformational dynamics. Based on these results, it is suggested that the different bioactivities of oxaliplatin and its enantiomeric analogues were controlled by the difference in hydrogen bonds formation dynamics between DNA and the Pt moiety. Our molecular dynamics approach was demonstrated to be applicable to the study of stereoisomer conformations of platinum-DNA model, thereby suggesting its potential application as a tool for the study and design of new effective platinum-based drugs.
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9
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Vargiu AV, Magistrato A. Atomistic-Level Portrayal of Drug-DNA Interplay: A History of Courtships and Meetings Revealed by Molecular Simulations. ChemMedChem 2014; 9:1966-81. [DOI: 10.1002/cmdc.201402203] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Indexed: 12/19/2022]
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10
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Nguyen TH, Rossetti G, Arnesano F, Ippoliti E, Natile G, Carloni P. Molecular Recognition of Platinated DNA from Chromosomal HMGB1. J Chem Theory Comput 2014; 10:3578-84. [PMID: 26588321 DOI: 10.1021/ct500402e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Cisplatin cures testicular and ovarian cancers with unprecedented potency. It induces its beneficial activity by covalently binding to DNA. Repair enzymes, which remove the platinated lesions from DNA, cause drug resistance. Chromosomal High Mobility Group Box proteins (HMGB) may interfere with this process by binding to platinated DNA. Using 8 μs multiple-walker well-tempered metadynamics simulations, here, we investigated the structural and the energetic determinants of one of the HMGB proteins (HMGB1A) in complex with the platinated oligonucleotide [Pt(NH3)2](2+)-d(CCUCTCTG*G*ACCTTCC)-d(GGAGAGACCTGGAAGG) (*G are platinated guanines), for which experimental structural information is available. The calculated affinity is in good agreement with experiment. The process is predicted to be enthalpy-driven, as found for other protein/DNA complexes. The Lys7 residue, whose side-chain was not resolved in the X-ray structure, is found to interact with the C4 5'-phosphate and this interaction emerges as a key facet for the molecular recognition process. In addition, our calculations provide a molecular basis for the experimentally measured decreased affinity of HMGB1A for platinated DNA, as a consequence of Cys22-Cys44 S-S bridge formation (such an oxidation cannot take place in some members of this protein family present in the testis, where the drug is particularly effective). This decrease is likely to be caused by a small yet significant rearrangement of helices H1 and H2 with consequent alteration of the Phe37 juxtaposition.
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Affiliation(s)
- Trung Hai Nguyen
- Computational Biophysics, German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich, Germany) , D-52425 Jülich, Germany.,Institute for Advanced Simulation IAS-5, Computational Biomedicine, Forschungszentrum Jülich , D-52425 Jülich, Germany.,Computational Biomedicine section (INM-9), Institute for Neuroscience and Medicine (INM) , 52425 Jülich, Germany
| | - Giulia Rossetti
- Computational Biophysics, German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich, Germany) , D-52425 Jülich, Germany.,Institute for Advanced Simulation IAS-5, Computational Biomedicine, Forschungszentrum Jülich , D-52425 Jülich, Germany.,Computational Biomedicine section (INM-9), Institute for Neuroscience and Medicine (INM) , 52425 Jülich, Germany.,Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, Barcelona 08028, Spain.,Joint IRB-BSC Program in Computational Biology, Barcelona, Spain.,Jülich Supercomputing Centre (JSC), Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Fabio Arnesano
- Department of Chemistry, University of Bari "A. Moro" , via Edoardo Orabona 4, I-70125 Bari, Italy
| | - Emiliano Ippoliti
- Computational Biophysics, German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich, Germany) , D-52425 Jülich, Germany.,Institute for Advanced Simulation IAS-5, Computational Biomedicine, Forschungszentrum Jülich , D-52425 Jülich, Germany.,Computational Biomedicine section (INM-9), Institute for Neuroscience and Medicine (INM) , 52425 Jülich, Germany
| | - Giovanni Natile
- Department of Chemistry, University of Bari "A. Moro" , via Edoardo Orabona 4, I-70125 Bari, Italy
| | - Paolo Carloni
- Computational Biophysics, German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich, Germany) , D-52425 Jülich, Germany.,Institute for Advanced Simulation IAS-5, Computational Biomedicine, Forschungszentrum Jülich , D-52425 Jülich, Germany.,Computational Biomedicine section (INM-9), Institute for Neuroscience and Medicine (INM) , 52425 Jülich, Germany
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11
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Lando DY, Chang CL, Fridman AS, Grigoryan IE, Galyuk EN, Hsueh YW, Hu CK. Comparative thermal and thermodynamic study of DNA chemically modified with antitumor drug cisplatin and its inactive analog transplatin. J Inorg Biochem 2014; 137:85-93. [PMID: 24831492 DOI: 10.1016/j.jinorgbio.2014.04.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 04/14/2014] [Accepted: 04/15/2014] [Indexed: 12/11/2022]
Abstract
Antitumor activity of cisplatin is exerted by covalent binding to DNA. For comparison, studies of cisplatin-DNA complexes often employ the very similar but inactive transplatin. In this work, thermal and thermodynamic properties of DNA complexes with these compounds were studied using differential scanning calorimetry (DSC) and computer modeling. DSC demonstrates that cisplatin decreases thermal stability (melting temperature, Tm) of long DNA, and transplatin increases it. At the same time, both compounds decrease the enthalpy and entropy of the helix-coil transition, and the impact of transplatin is much higher. From Pt/nucleotide molar ratio rb=0.001, both compounds destroy the fine structure of DSC profile and increase the temperature melting range (ΔT). For cisplatin and transplatin, the dependences δTm vs rb differ in sign, while δΔT vs rb are positive for both compounds. The change in the parameter δΔT vs rb demonstrates the GC specificity in the location of DNA distortions. Our experimental results and calculations show that 1) in contrast to [Pt(dien)Cl]Cl, monofunctional adducts formed by transplatin decrease the thermal stability of long DNA at [Na(+)]>30mM; 2) interstrand crosslinks of cisplatin and transplatin only slightly increase Tm; 3) the difference in thermal stability of DNA complexes with cisplatin vs DNA complexes with transplatin mainly arises from the different thermodynamic properties of their intrastrand crosslinks. This type of crosslink appears to be responsible for the antitumor activity of cisplatin. At any [Na(+)] from interval 10-210mM, cisplatin and transplatin intrastrand crosslinks give rise to destabilization and stabilization, respectively.
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Affiliation(s)
- Dmitri Y Lando
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141 Minsk, Belarus.
| | - Chun-Ling Chang
- Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan
| | - Alexander S Fridman
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141 Minsk, Belarus
| | | | - Elena N Galyuk
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141 Minsk, Belarus
| | - Ya-Wei Hsueh
- Department of Physics, National Central University, Chungli 32001, Taiwan
| | - Chin-Kun Hu
- Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
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12
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Yue H, Yang B, Wang Y, Chen G. Investigations of the binding of [Pt2(DTBPA)Cl2](II) and [Pt2(TPXA)Cl2](II) to DNA via various cross-linking modes. Int J Mol Sci 2013; 14:19556-86. [PMID: 24077126 PMCID: PMC3821573 DOI: 10.3390/ijms141019556] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/14/2013] [Accepted: 09/10/2013] [Indexed: 12/14/2022] Open
Abstract
We have constructed models for a series of platinum-DNA adducts that represent the binding of two agents, [Pt2(DTBPA)Cl2](II) and [Pt2(TPXA)Cl2](II), to DNA via inter- and intra-strand cross-linking, and carried out molecular dynamics simulations and DNA conformational dynamics calculations. The effects of trans- and cis-configurations of the centers of these di-nuclear platinum agents, and of different bridging linkers, have been investigated on the conformational distortions of platinum-DNA adducts formed via inter- and intra-strand cross-links. The results demonstrate that the DNA conformational distortions for the various platinum-DNA adducts with differing cross-linking modes are greatly influenced by the difference between the platinum-platinum distance for the platinum agent and the platinum-bound N7–N7 distance for the DNA molecule, and by the flexibility of the bridging linkers in the platinum agent. However, the effects of trans/cis-configurations of the platinum-centers on the DNA conformational distortions in the platinum-DNA adducts depend on the inter- and intra-strand cross-linking modes. In addition, we discuss the relevance of DNA base motions, including opening, shift and roll, to the changes in the parameters of the DNA major and minor grooves caused by binding of the platinum agent.
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Affiliation(s)
| | | | - Yan Wang
- Authors to whom correspondence should be addressed; E-Mails: (Y.W.); (G.C.); Tel.: +86-10-5880-5247 (Y.W.); +86-10-5880-5424 (G.C.); Fax: +86-10-5880-2075 (Y.W. & G.C.)
| | - Guangju Chen
- Authors to whom correspondence should be addressed; E-Mails: (Y.W.); (G.C.); Tel.: +86-10-5880-5247 (Y.W.); +86-10-5880-5424 (G.C.); Fax: +86-10-5880-2075 (Y.W. & G.C.)
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13
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Wu K, Liu S, Luo Q, Hu W, Li X, Wang F, Zheng R, Cui J, Sadler PJ, Xiang J, Shi Q, Xiong S. Thymines in Single-Stranded Oligonucleotides and G-Quadruplex DNA Are Competitive with Guanines for Binding to an Organoruthenium Anticancer Complex. Inorg Chem 2013; 52:11332-42. [DOI: 10.1021/ic401606v] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kui Wu
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Suyan Liu
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Qun Luo
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Wenbing Hu
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Xianchan Li
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Fuyi Wang
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
| | - Renhui Zheng
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing 100190, P. R. China
| | - Jie Cui
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Peter J. Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4
7AL, United Kingdom
| | - Junfeng Xiang
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Qiang Shi
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing 100190, P. R. China
| | - Shaoxiang Xiong
- Beijing National
Laboratory
for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- CAS Key Laboratory of Analytical
Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Beijing 100190, P. R. China
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14
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Guo WJ, Zhang YM, Zhang L, Huang B, Tao FF, Chen W, Guo ZJ, Xu Q, Sun Y. Novel monofunctional platinum (II) complex Mono-Pt induces apoptosis-independent autophagic cell death in human ovarian carcinoma cells, distinct from cisplatin. Autophagy 2013; 9:996-1008. [PMID: 23580233 PMCID: PMC3722334 DOI: 10.4161/auto.24407] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Failure to engage apoptosis appears to be a leading mechanism of resistance to traditional platinum drugs in patients with ovarian cancer. Therefore, an alternative strategy to induce cell death is needed for the chemotherapy of this apoptosis-resistant cancer. Here we report that autophagic cell death, distinct from cisplatin-induced apoptosis, is triggered by a novel monofunctional platinum (II) complex named Mono-Pt in human ovarian carcinoma cells. Mono-Pt-induced cell death has the following features: cytoplasmic vacuolation, caspase-independent, no nuclear fragmentation or chromatin condensation, and no apoptotic bodies. These characteristics integrally indicated that Mono-Pt, rather than cisplatin, initiated a nonapoptotic cell death in Caov-3 ovarian carcinoma cells. Furthermore, incubation of the cells with Mono-Pt but not with cisplatin produced an increasing punctate distribution of microtubule-associated protein 1 light chain 3 (LC3), and an increasing ratio of LC3-II to LC3-I. Mono-Pt also caused the formation of autophagic vacuoles as revealed by monodansylcadaverine staining and transmission electron microscopy. In addition, Mono-Pt-induced cell death was significantly inhibited by the knockdown of either BECN1 or ATG7 gene expression, or by autophagy inhibitors 3-methyladenine, chloroquine and bafilomycin A 1. Moreover, the effect of Mono-Pt involved the AKT1-MTOR-RPS6KB1 pathway and MAPK1 (ERK2)/MAPK3 (ERK1) signaling, since the MTOR inhibitor rapamycin increased, while the MAPK1/3 inhibitor U0126 decreased Mono-Pt-induced autophagic cell death. Taken together, our results suggest that Mono-Pt exerts anticancer effect via autophagic cell death in apoptosis-resistant ovarian cancer. These findings lead to increased options for anticancer platinum drugs to induce cell death in cancer.
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Affiliation(s)
- Wen-Jie Guo
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing, China
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15
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Cui S, Wang Y, Chen G. Disturbance of DNA conformation by the binding of testosterone-based platinum drugs via groove-face and intercalative interactions: a molecular dynamics simulation study. BMC STRUCTURAL BIOLOGY 2013; 13:4. [PMID: 23517640 PMCID: PMC3610147 DOI: 10.1186/1472-6807-13-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 03/14/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND To explore novel platinum-based anticancer agents that are distinct from the structure and interaction mode of the traditional cisplatin by forming the bifunctional intrastrand 1,2 GpG adduct, the monofunctional platinum+DNA adducts with extensive non-covalent interactions had been studied. It was reported that the monofunctional testosterone-based platinum(II) agents present the high anticancer activity. Moreover, it was also found that the testosterone-based platinum agents could cause the DNA helix to undergo significant unwinding and bending over the non-testosterone-based platinum agents. However, the interaction mechanisms of these platinum agents with DNA at the atomic level are not yet clear so far. RESULTS In the present work, we used molecular dynamics (MD) simulations and DNA conformational dynamics calculations to study the DNA distortion properties of the testosterone-based platinum+DNA, the improved testosterone-based platinum+DNA and the non-testosterone-based platinum+DNA adducts. The results show that the intercalative interaction of the improved flexible testosterone-based platinum agent with DNA molecule could cause larger DNA conformational distortion than the groove-face interaction of the rigid testosterone-based platinum agent with DNA molecule. Further investigations for the non-testosterone-based platinum agent reveal the occurrence of insignificant change of DNA conformation due to the absence of testosterone ligand in such agent. Based on the DNA dynamics analysis, the DNA base motions relating to DNA groove parameter changes and hydrogen bond destruction of DNA base pairs were also discussed in this work. CONCLUSIONS The flexible linker in the improved testosterone-based platinum agent causes an intercalative interaction with DNA in the improved testosterone-based platinum+DNA adduct, which is different from the groove-face interaction caused by a rigid linker in the testosterone-based platinum agent. The present investigations provide useful information of DNA conformation affected by a testosterone-based platinum complex at the atomic level.
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Affiliation(s)
- Shanshan Cui
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Yan Wang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
- Present address: College of Chemistry, Beijing Normal University, 19# Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
| | - Guangju Chen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
- Present address: College of Chemistry, Beijing Normal University, 19# Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
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16
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Lando DY, Galyuk EN, Chang CL, Hu CK. Temporal behavior of DNA thermal stability in the presence of platinum compounds. Role of monofunctional and bifunctional adducts. J Inorg Biochem 2012; 117:164-70. [DOI: 10.1016/j.jinorgbio.2012.08.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/24/2012] [Accepted: 08/28/2012] [Indexed: 10/27/2022]
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17
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Ramachandran S, Temple B, Alexandrova AN, Chaney SG, Dokholyan NV. Recognition of platinum-DNA adducts by HMGB1a. Biochemistry 2012; 51:7608-17. [PMID: 22950413 DOI: 10.1021/bi3008577] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cisplatin (CP) and oxaliplatin (OX), platinum-based drugs used widely in chemotherapy, form adducts on intrastrand guanines (5'GG) in genomic DNA. DNA damage recognition proteins, transcription factors, mismatch repair proteins, and DNA polymerases discriminate between CP- and OX-GG DNA adducts, which could partly account for differences in the efficacy, toxicity, and mutagenicity of CP and OX. In addition, differential recognition of CP- and OX-GG adducts is highly dependent on the sequence context of the Pt-GG adduct. In particular, DNA binding protein domain HMGB1a binds to CP-GG DNA adducts with up to 53-fold greater affinity than to OX-GG adducts in the TGGA sequence context but shows much smaller differences in binding in the AGGC or TGGT sequence contexts. Here, simulations of the HMGB1a-Pt-DNA complex in the three sequence contexts revealed a higher number of interface contacts for the CP-DNA complex in the TGGA sequence context than in the OX-DNA complex. However, the number of interface contacts was similar in the TGGT and AGGC sequence contexts. The higher number of interface contacts in the CP-TGGA sequence context corresponded to a larger roll of the Pt-GG base pair step. Furthermore, geometric analysis of stacking of phenylalanine 37 in HMGB1a (Phe37) with the platinated guanines revealed more favorable stacking modes correlated with a larger roll of the Pt-GG base pair step in the TGGA sequence context. These data are consistent with our previous molecular dynamics simulations showing that the CP-TGGA complex was able to sample larger roll angles than the OX-TGGA complex or either CP- or OX-DNA complexes in the AGGC or TGGT sequences. We infer that the high binding affinity of HMGB1a for CP-TGGA is due to the greater flexibility of CP-TGGA compared to OX-TGGA and other Pt-DNA adducts. This increased flexibility is reflected in the ability of CP-TGGA to sample larger roll angles, which allows for a higher number of interface contacts between the Pt-DNA adduct and HMGB1a.
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Affiliation(s)
- Srinivas Ramachandran
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, USA
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18
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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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19
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Solier S, Zhang YW, Ballestrero A, Pommier Y, Zoppoli G. DNA damage response pathways and cell cycle checkpoints in colorectal cancer: current concepts and future perspectives for targeted treatment. Curr Cancer Drug Targets 2012; 12:356-71. [PMID: 22385513 DOI: 10.2174/156800912800190901] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 07/05/2011] [Accepted: 12/22/2011] [Indexed: 01/28/2023]
Abstract
Although several drugs have been designed in the last few years to target specific key pathways and functions in colorectal cancer (CRC), the backbone of CRC treatment is still made up of compounds which rely on DNA damage to accomplish their role. DNA damage response (DDR) and checkpoint pathways are intertwined signaling networks that arrest cell cycle, recognize and repair genetic mistakes which arise during DNA replication and transcription, as well as through the exposure to chemical and physical agents that interact with nucleic acids. The good but highly variable activity of DNA damaging agents in the treatment of CRC suggests that intrinsic alterations in DDR pathways and cell cycle checkpoints may contribute differentially to the way cancer cells react to DNA damage. In the present review, our aim is to depict the recent advances in understanding the molecular basis of the activity of DNA damaging agents used for the treatment of CRC. We focus on the known and potential drug targets that are part of these complex and intertwined pathways. We describe the potential role of the checkpoints in CRC, and how their pharmacological manipulation could lead to chemopotentiation or synergism with currently used drugs. Novel therapeutic agents playing a role in DDR and checkpoint inhibition are assessed. We discuss the possible rationale for combining PARP inhibition with DNA damaging agents, and we address the link between DDR and EGFR pathways in CRC.
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Affiliation(s)
- S Solier
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda (MD), USA
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20
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Elder R, Jayaraman A. Sequence-specific recognition of cancer drug-DNA adducts by HMGB1a repair protein. Biophys J 2012; 102:2331-8. [PMID: 22677386 PMCID: PMC3353062 DOI: 10.1016/j.bpj.2012.04.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 04/05/2012] [Accepted: 04/09/2012] [Indexed: 01/16/2023] Open
Abstract
The efficacy of cancer drugs such as cisplatin (Cp) and oxaliplatin (Ox), which covalently bind to DNA to form drug-DNA adducts, is linked to their recognition by repair proteins such as HMGB1a. Previous experimental studies showed that HMGB1a's binding affinity for Cp- and Ox-DNA varies with the drug used and the local DNA sequence context of the adduct. We link this differential binding affinity to the free energy of deforming (bending and minor groove opening) the drug-DNA molecule during HMGB1a binding. Specifically, the minimal binding affinity of HMGB1a for Ox-DNA in the TGGA context is explained by its larger deformation free energy compared with Cp-DNA or Ox-DNA in other sequence contexts. Methyl groups on neighboring thymine bases in Ox-TGGA crowd the minor groove and sterically hinder the motion of the diaminocyclohexane ring of Ox, leading to this reduced deformability and resultant decrease in HMGB1a's binding affinity.
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Affiliation(s)
| | - Arthi Jayaraman
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
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21
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Bhattacharyya D, Ramachandran S, Sharma S, Pathmasiri W, King CL, Baskerville-Abraham I, Boysen G, Swenberg JA, Campbell SL, Dokholyan NV, Chaney SG. Flanking bases influence the nature of DNA distortion by platinum 1,2-intrastrand (GG) cross-links. PLoS One 2011; 6:e23582. [PMID: 21853154 PMCID: PMC3154474 DOI: 10.1371/journal.pone.0023582] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 07/21/2011] [Indexed: 11/28/2022] Open
Abstract
The differences in efficacy and molecular mechanisms of platinum anti-cancer drugs cisplatin (CP) and oxaliplatin (OX) are thought to be partially due to the differences in the DNA conformations of the CP and OX adducts that form on adjacent guanines on DNA, which in turn influence the binding of damage-recognition proteins that control downstream effects of the adducts. Here we report a comprehensive comparison of the structural distortion of DNA caused by CP and OX adducts in the TGGT sequence context using nuclear magnetic resonance (NMR) spectroscopy and molecular dynamics (MD) simulations. When compared to our previous studies in other sequence contexts, these structural studies help us understand the effect of the sequence context on the conformation of Pt-GG DNA adducts. We find that both the sequence context and the type of Pt-GG DNA adduct (CP vs. OX) play an important role in the conformation and the conformational dynamics of Pt-DNA adducts, possibly explaining their influence on the ability of many damage-recognition proteins to bind to Pt-DNA adducts.
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Affiliation(s)
- Debadeep Bhattacharyya
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Srinivas Ramachandran
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Program in Cellular and Molecular Biophysics, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Shantanu Sharma
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Wimal Pathmasiri
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Candice L. King
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Irene Baskerville-Abraham
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Gunnar Boysen
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - James A. Swenberg
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Sharon L. Campbell
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
| | - Nikolay V. Dokholyan
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
| | - Stephen G. Chaney
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
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22
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Buss I, Garmann D, Galanski MS, Weber G, Kalayda GV, Keppler BK, Jaehde U. Enhancing lipophilicity as a strategy to overcome resistance against platinum complexes? J Inorg Biochem 2011; 105:709-17. [PMID: 21450275 DOI: 10.1016/j.jinorgbio.2011.02.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 02/10/2011] [Accepted: 02/10/2011] [Indexed: 01/31/2023]
Abstract
Decreased influx represents one of the major resistance mechanisms of platinum complexes. In order to address the question if this mechanism of resistance can be overcome by enhancing the lipophilicity of platinum complexes, we investigated the influence of lipophilicity on cellular accumulation and cytotoxicity in a panel of oxaliplatin analogues with different carrier ligands. Cellular accumulation, DNA platination and cytotoxicity were measured in a cisplatin-sensitive and -resistant ovarian carcinoma (A2780/A2780cis) and in an oxaliplatin-sensitive and -resistant ileocecal colorectal adenocarcinoma (HCT-8/HCT-8ox) cell line pair. Platinum concentrations were determined by flameless atomic absorption spectrometry or adsorptive stripping voltammetry. Passive diffusion represented the main influx mechanism of oxaliplatin analogues during the first minutes of incubation as indicated by a correlation between lipophilicity and early influx rate. Afterwards, the predominant influx mechanism was lipophilicity-independent. More lipophilic complexes showed a reduced cytotoxic activity, although the early influx rate was increased. The resistance profiles of the two cell line pairs were found to be different: HCT-8ox cells were less resistant against more lipophilic complexes, whereas A2780cis cells exhibited a comparable degree of resistance against all investigated compounds. However, the reduction in resistance factor of HCT-8ox cells cannot be explained by increased influx suggesting that other resistance mechanisms are circumvented upon exposure to more lipophilic compounds. Though resistance against more lipophilic platinum complexes analogues is lower we conclude that enhancing lipophilicity is not a successful strategy to overcome platinum resistance as higher lipophilicity is also associated with lower cytotoxic activity.
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Affiliation(s)
- Irina Buss
- Institute of Pharmacy, University of Bonn, Bonn, Germany.
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23
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Georgiades SN, Vilar R. Interaction of metal complexes with nucleic acids. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b918406f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Zhu Y, Wang Y, Chen G. Differences in conformational dynamics of [Pt3(HPTAB)]6+-DNA adducts with various cross-linking modes. Nucleic Acids Res 2009; 37:5930-42. [PMID: 19654239 PMCID: PMC2761282 DOI: 10.1093/nar/gkp618] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
We present here molecular dynamics simulations and DNA conformational dynamics for a series of trinuclear platinum [Pt3(HPTAB)]6+-DNA adducts [HPTAB = N,N,N′,N′,N′′,N′′-hexakis (2-pyridyl-methyl)-1,3,5-tris(aminomethyl) benzene], including three types of bifunctional crosslinks and four types of trifunctional crosslinks. Our simulation results reveal that binding of the trinuclear platinum compound to a DNA duplex induces the duplex unwinding in the vicinity of the platination sites, and causes the DNA to bend toward the major groove. As a consequence, this produces a DNA molecule whose minor groove is more widened and shallow compared to that of an undamaged bare-DNA molecule. Notably, for trifunctional crosslinks, we have observed extensive DNA conformational distortions, which is rarely seen for normal platinum–DNA adducts. Our findings, in this study, thus provide further support for the idea that platinum compounds with trifunctional intra-strand or long-range-inter-strand cross-linking modes can generate larger DNA conformational distortions than other types of cross-linking modes.
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Affiliation(s)
- Yanyan Zhu
- College of Chemistry, Beijing Normal University, Beijing 100875, P R China
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