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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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2
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Ahmadi F, Shabrandi N, Hosseinzadeh L, Azizian H. Two DNA binding modes of a zinc-metronidazole and biological evaluation as a potent anti-cancer agent. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:449-480. [PMID: 30689502 DOI: 10.1080/15257770.2018.1562073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A complex of metronidazole (MTZ) with zinc ion was synthesized and characterized by UV-Vis, Fourier transform infrared (FT-IR), 1H-NMR, X-ray crystallography and thermal gravimetric-differential thermal analysis (TG-DTA). The cytotoxicity effect of the synthesized complex investigated over SKNMC, A549, MCF-7, and MCDK cell lines and the results have shown that it has high cytotoxic potential over cancer cell lines. In order to clarify the mechanism of cell cytotoxicity, the oxidative stress and binding of the complex to the calf thymus-DNA studied by evaluating the intrinsic binding constant and defining thermodynamic parameters of complex over the DNA accompanying with in silico molecular modeling method. For this purpose, the complex optimized at the B3LYP/LANL2DZ level and docked over the DNA structure. The results revealed that the metronidazole-zinc complex interacted with DNA via hydrogen binding and electrostatic interaction to the minor groove region and phosphate backbone of DNA, respectively.
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Affiliation(s)
- Farhad Ahmadi
- a Department of Medicinal Chemistry Faculty of Pharmacy , Kermanshah University of Medical Sciences , Kermanshah , Iran.,b Physiology Research Center Iran University of Medical Sciences , Tehran , Iran.,c Department of Medicinal Chemistry Faculty of Pharmacy-International Campus , Iran University of Medical Sciences , Tehran , Iran
| | - Nosaibeh Shabrandi
- a Department of Medicinal Chemistry Faculty of Pharmacy , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Leilah Hosseinzadeh
- d Student Research Committee, Faculty of Pharmacy , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Homa Azizian
- c Department of Medicinal Chemistry Faculty of Pharmacy-International Campus , Iran University of Medical Sciences , Tehran , Iran
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3
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Kasparkova J, Kostrhunova H, Novohradsky V, Pracharova J, Curci A, Margiotta N, Natile G, Brabec V. Anticancer kiteplatin pyrophosphate derivatives show unexpected target selectivity for DNA. Dalton Trans 2018; 46:14139-14148. [PMID: 28972623 DOI: 10.1039/c7dt02633a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One of the promising new antitumor platinum complexes is a large-ring chelate complex [PtCl2(cis-1,4-DACH)] (DACH = diaminocyclohexane) (kiteplatin). Recently, new platinum(ii) derivatives of kiteplatin with pyrophosphate as a carrier ligand have been synthesized and tested on a panel of human cancer cell lines. These derivatives of kiteplatin were found to be more effective than clinically used anticancer platinum drugs. The design of kiteplatin pyrophosphate derivatives was based on the concept of pyrophosphate coordinated platinum complexes, phosphaplatins. Phosphaplatins have been shown to function without binding to DNA and hence DNA has been excluded as the target of phosphaplatins in contrast to conventional antitumor platinum drugs. Cytotoxicity, major cellular targets and DNA interactions of the new anticancer platinum drug were characterized by standard biochemical methods and methods of molecular and cellular biology. We demonstrate that, in contrast to what has been reported on closely related phosphaplatins, the derivatives of kiteplatin with the pyrophosphate carrier ligand are activated in the cellular environment. This activation, which yields species capable of platination of DNA, very likely comprises the hydrolytic release of the pyrophosphate ligand that could be enzymatically catalyzed. Collectively, these data provide convincing evidence that unexpectedly DNA is an important target for the biological activity of the kiteplatin pyrophosphate derivatives, although the overall mechanism of action might be different from those of conventional platinum drugs.
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Affiliation(s)
- Jana Kasparkova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, CZ-61265 Brno, Czech Republic.
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4
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Potentiation of cytotoxic action of cis -[PtCl 2 (NH 3 )(1M7AI)] by UVA irradiation. Mechanistic insights. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.06.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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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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Johnstone TC, Suntharalingam K, Lippard SJ. The Next Generation of Platinum Drugs: Targeted Pt(II) Agents, Nanoparticle Delivery, and Pt(IV) Prodrugs. Chem Rev 2016; 116:3436-86. [PMID: 26865551 PMCID: PMC4792284 DOI: 10.1021/acs.chemrev.5b00597] [Citation(s) in RCA: 1674] [Impact Index Per Article: 209.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The platinum drugs, cisplatin, carboplatin, and oxaliplatin, prevail in the treatment of cancer, but new platinum agents have been very slow to enter the clinic. Recently, however, there has been a surge of activity, based on a great deal of mechanistic information, aimed at developing nonclassical platinum complexes that operate via mechanisms of action distinct from those of the approved drugs. The use of nanodelivery devices has also grown, and many different strategies have been explored to incorporate platinum warheads into nanomedicine constructs. In this Review, we discuss these efforts to create the next generation of platinum anticancer drugs. The introduction provides the reader with a brief overview of the use, development, and mechanism of action of the approved platinum drugs to provide the context in which more recent research has flourished. We then describe approaches that explore nonclassical platinum(II) complexes with trans geometry or with a monofunctional coordination mode, polynuclear platinum(II) compounds, platinum(IV) prodrugs, dual-threat agents, and photoactivatable platinum(IV) complexes. Nanoparticles designed to deliver platinum(IV) complexes will also be discussed, including carbon nanotubes, carbon nanoparticles, gold nanoparticles, quantum dots, upconversion nanoparticles, and polymeric micelles. Additional nanoformulations, including supramolecular self-assembled structures, proteins, peptides, metal-organic frameworks, and coordination polymers, will then be described. Finally, the significant clinical progress made by nanoparticle formulations of platinum(II) agents will be reviewed. We anticipate that such a synthesis of disparate research efforts will not only help to generate new drug development ideas and strategies, but also will reflect our optimism that the next generation of approved platinum cancer drugs is about to arrive.
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Affiliation(s)
- Timothy C Johnstone
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | | | - Stephen J Lippard
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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Kasparkova J, Kostrhunova H, Novakova O, Křikavová R, Vančo J, Trávníček Z, Brabec V. A Photoactivatable Platinum(IV) Complex Targeting Genomic DNA and Histone Deacetylases. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506533] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Kasparkova J, Kostrhunova H, Novakova O, Křikavová R, Vančo J, Trávníček Z, Brabec V. A Photoactivatable Platinum(IV) Complex Targeting Genomic DNA and Histone Deacetylases. Angew Chem Int Ed Engl 2015; 54:14478-82. [PMID: 26458068 DOI: 10.1002/anie.201506533] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 08/24/2015] [Indexed: 11/07/2022]
Abstract
We report toxic effects of a photoactivatable platinum(IV) complex conjugated with suberoyl-bis-hydroxamic acid in tumor cells. The conjugate exerts, after photoactivation, two functions: activity as both a platinum(II) anticancer drug and histone deacetylase (HDAC) inhibitor in cancer cells. This approach relies on the use of a Pt(IV) pro-drug, acting by two independent mechanisms of biological action in a cooperative manner, which can be selectively photoactivated to a cytotoxic species in and around a tumor, thereby increasing selectivity towards cancer cells. These results suggest that this strategy is a valuable route to design new platinum agents with higher efficacy for photodynamic anticancer chemotherapy.
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Affiliation(s)
- Jana Kasparkova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno (Czech Republic).
| | - Hana Kostrhunova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno (Czech Republic)
| | - Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno (Czech Republic)
| | - Radka Křikavová
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 77146 Olomouc (Czech Republic)
| | - Ján Vančo
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 77146 Olomouc (Czech Republic)
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 77146 Olomouc (Czech Republic)
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno (Czech Republic).,Department of Biophysics, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 77146 Olomouc (Czech Republic)
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9
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Zhao Y, Woods JA, Farrer NJ, Robinson KS, Pracharova J, Kasparkova J, Novakova O, Li H, Salassa L, Pizarro AM, Clarkson GJ, Song L, Brabec V, Sadler PJ. Diazido mixed-amine platinum(IV) anticancer complexes activatable by visible-light form novel DNA adducts. Chemistry 2013; 19:9578-91. [PMID: 23733242 PMCID: PMC4280898 DOI: 10.1002/chem.201300374] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 01/09/2023]
Abstract
Platinum diam(m)ine complexes, such as cisplatin, are successful anticancer drugs, but suffer from problems of resistance and side-effects. Photoactivatable Pt(IV) prodrugs offer the potential of targeted drug release and new mechanisms of action. We report the synthesis, X-ray crystallographic and spectroscopic properties of photoactivatable diazido complexes trans,trans,trans-[Pt(N3)2(OH)2(MA)(Py)] (1; MA=methylamine, Py=pyridine) and trans,trans,trans-[Pt(N3)2(OH)2(MA)(Tz)] (2; Tz=thiazole), and interpret their photophysical properties by TD-DFT modelling. The orientation of the azido groups is highly dependent on H bonding and crystal packing, as shown by polymorphs 1p and 1q. Complexes 1 and 2 are stable in the dark towards hydrolysis and glutathione reduction, but undergo rapid photoreduction with UVA or blue light with minimal amine photodissociation. They are over an order of magnitude more potent towards HaCaT keratinocytes, A2780 ovarian, and OE19 oesophageal carcinoma cells than cisplatin and show particular potency towards cisplatin-resistant human ovarian cancer cells (A2780cis). Analysis of binding to calf-thymus (CT), plasmids, oligonucleotide DNA and individual nucleotides reveals that photoactivated 1 and 2 form both mono- and bifunctional DNA lesions, with preference for G and C, similar to transplatin, but with significantly larger unwinding angles and a higher percentage of interstrand cross-links, with evidence for DNA strand cross-linking further supported by a comet assay. DNA lesions of 1 and 2 on a 50 bp duplex were not recognised by HMGB1 protein, in contrast to cisplatin-type lesions. The photo-induced platination reactions of DNA by 1 and 2 show similarities with the products of the dark reactions of the Pt(II) compounds trans-[PtCl2(MA)(Py)] (5) and trans-[PtCl2(MA)(Tz)] (6). Following photoactivation, complex 2 reacted most rapidly with CT DNA, followed by 1, whereas the dark reactions of 5 and 6 with DNA were comparatively slow. Complexes 1 and 2 can therefore give rapid potent photocytotoxicity and novel DNA lesions in cancer cells, with no activity in the absence of irradiation.
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Affiliation(s)
- Yao Zhao
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Julie A Woods
- Photobiology Unit, Department of Dermatology, University of DundeeNinewells Hospital and Medical School, Dundee, DD1 9SY (UK)
| | - Nicola J Farrer
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Kim S Robinson
- Photobiology Unit, Department of Dermatology, University of DundeeNinewells Hospital and Medical School, Dundee, DD1 9SY (UK)
| | - Jitka Pracharova
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Jana Kasparkova
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.Kralovopolska 135, 61265 Brno (Czech Republic)
| | - Huilin Li
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Luca Salassa
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Ana M Pizarro
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Guy J Clarkson
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Lijiang Song
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Viktor Brabec
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Peter J Sadler
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
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10
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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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11
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Antitumor carboplatin is more toxic in tumor cells when photoactivated: enhanced DNA binding. J Biol Inorg Chem 2012; 17:891-8. [DOI: 10.1007/s00775-012-0906-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 05/13/2012] [Indexed: 11/27/2022]
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12
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Pracharova J, Zerzankova L, Stepankova J, Novakova O, Farrer NJ, Sadler PJ, Brabec V, Kasparkova J. Interactions of DNA with a new platinum(IV) azide dipyridine complex activated by UVA and visible light: relationship to toxicity in tumor cells. Chem Res Toxicol 2012; 25:1099-111. [PMID: 22420335 DOI: 10.1021/tx300057y] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The Pt(IV) diazido complex trans,trans,trans-[Pt(N(3))(2)(OH)(2)(pyridine)(2)] (1) is unreactive in the dark but is cytotoxic when photoactivated by UVA and visible light. We have shown that 1 when photoactivated accumulates in tumor cells and binds strongly to nuclear DNA under conditions in which it is toxic to tumor cells. The nature of the DNA adducts, including conformational alterations, induced by photoactivated 1 are distinctly different from those produced in DNA by conventional cisplatin or transplatin. In addition, the observation that major DNA adducts of photoactivated 1 are able to efficiently stall RNA polymerase II more efficiently than cisplatin suggests that transcription inhibition may contribute to the cytotoxicity levels observed for photoactivated 1. Hence, DNA adducts of 1 could trigger a number of downstream cellular effects different from those triggered in cancer cells by DNA adducts of cisplatin. This might lead to the therapeutic effects that could radically improve chemotherapy by platinum complexes. The findings of the present work help to explain the different cytotoxic effects of photoactivated 1 and conventional cisplatin and thereby provide new insights into mechanisms associated with the antitumor effects of platinum complexes photoactivated by UVA and visible light.
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Affiliation(s)
- Jitka Pracharova
- Department of Biophysics, Faculty of Science, Palacky University, 17. Listopadu 12, Olomouc, Czech Republic
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13
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Dodoff NI, Lalia-Kantouri M, Gdaniec M, Czapik A, Vassilev NG, Markova LS, Apostolova MD. trans-Dichloro(η 2-ethylene) (N-3-pyridinylmethanesulfonamide)platinum(II). Crystal structure, spectroscopic, and thermoanalytical characterization, and cytotoxicity assays. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.659729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Nicolay I. Dodoff
- a Acad. R. Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences , Acad. G. Bonchev Street, Block 21, 1113 Sofia , Bulgaria
| | - Maria Lalia-Kantouri
- b Department of Chemistry, Faculty of Sciences , Aristotle University of Thessaloniki , P.O. Box 135, 54124 Thessaloniki , Greece
| | - Maria Gdaniec
- c Faculty of Chemistry , Adam Mickiewicz University , ul. Grunwaldzka 6, 60780 Poznań , Poland
| | - Agnieszka Czapik
- c Faculty of Chemistry , Adam Mickiewicz University , ul. Grunwaldzka 6, 60780 Poznań , Poland
| | - Nikolay G. Vassilev
- d Institute of Organic Chemistry with Center of Phytochemistry, Bulgarian Academy of Sciences , Acad. G. Bonchev Street, Block 9, 1113 Sofia , Bulgaria
| | - Leni S. Markova
- a Acad. R. Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences , Acad. G. Bonchev Street, Block 21, 1113 Sofia , Bulgaria
| | - Margarita D. Apostolova
- a Acad. R. Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences , Acad. G. Bonchev Street, Block 21, 1113 Sofia , Bulgaria
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14
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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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15
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Huang XW, Zhu WT, Zhang JC, Su GJ. Effects of the ancillary ligands of polypyridyl cobalt(II) complexes on pH-induced spectral properties and DNA binding properties. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0624-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Scaffidi-Domianello YY, Meelich K, Jakupec MA, Arion VB, Kukushkin VY, Galanski M, Keppler BK. Novel cis- and trans-configured bis(oxime)platinum(II) complexes: synthesis, characterization, and cytotoxic activity. Inorg Chem 2010; 49:5669-78. [PMID: 20459062 DOI: 10.1021/ic100584b] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel cis- and trans-configured bis(oxime)platinum(II) complexes have been synthesized and characterized by elemental analyses, IR, electrospray ionization mass spectrometry, multinuclear ((1)H, (13)C, and (195)Pt) NMR spectroscopy, and, in five cases, by X-ray diffraction. Their cytotoxicity was studied in the cisplatin-sensitive CH1 cell line as well as in inherently cisplatin-resistant SW480 cancer cells. Remarkably, every single dihalidobis(oxime)platinum(II) complex (with either a cis or trans configuration) shows a comparable cytotoxic potency in both cell lines, indicating a capacity of overcoming cisplatin resistance. Particularly strong cytotoxicities were observed in the case of trans-[PtCl(2)(R(2)C=NOH)(2)] (R = Me, n-Pr, i-Pr) with IC(50) values in the high nanomolar concentration range in both CH1 and SW480 cancer cells. These complexes are as potent as cisplatin in CH1 cells and up to 20 times more potent than cisplatin in SW480 cells. In comparison to transplatin, the novel compounds are up to 90 (CH1) and 120 times (SW480) more cytotoxic. The previously reported observation that the trans geometry yields a more active complex in the case of [PtCl(2)(Me(2)C=NOH)(2)] could be confirmed for at least two structural analogues.
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Ramos-Lima FJ, Moneo V, Quiroga AG, Carnero A, Navarro-Ranninger C. The role of p53 in the cellular toxicity by active trans-platinum complexes containing isopropylamine and hydroxymethylpyridine. Eur J Med Chem 2009; 45:134-41. [PMID: 19853978 DOI: 10.1016/j.ejmech.2009.09.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 09/14/2009] [Accepted: 09/22/2009] [Indexed: 11/30/2022]
Abstract
Despite some initial research that reported a lack of activity of trans geometry, complexes with general formula trans-[PtCl2(L)(L')] exhibit an important cytotoxic activity in cisplatin-sensitive and resistant cell lines. Based on the proposed mechanism of action for the trans-platinum compounds, they might form DNA adducts initiating a DNA-damage response and ultimately ending in the activation of the p53 protein. In the present work, we have studied the biochemical properties of the trans-[PtCl2(isopropylamine)(L)] complexes (where L is 3- or 4-(hydroxymethyl)-pyridine) against several cell lines and the relationship between cytotoxicity and the protein p53. Both complexes showed different antitumoral properties depending on the presence or absence of protein p53 in isogenic colon carcinoma HCT116 cell lines. Cell cycle studies with the complexes in these cell lines were performed to investigate their antitumoral activity. Apoptosis was observed to be launched from G1 or G2/M accumulations. Confocal microscopy showed the different behaviour of isogenic tumoral cell lines treated with the trans-platinum complexes. Our data suggest that small differences in the carrier ligands could play an important role in the overall biological effects. The body of the research regarding structure-activity relationships such as the different position of groups in the carrier ligands will provide new rational basis for the design of new platinum antitumor drugs.
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Affiliation(s)
- Francisco J Ramos-Lima
- Departamento de Química Inorgánica, Universidad Autónoma de Madrid, Francisco Tomas y Valiente 7, 28049 Madrid, Spain
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Nováková O, Malina J, Kaspárková J, Halámiková A, Bernard V, Intini F, Natile G, Brabec V. Energetics, conformation, and recognition of DNA duplexes modified by methylated analogues of [PtCl(dien)]+. Chemistry 2009; 15:6211-21. [PMID: 19449361 DOI: 10.1002/chem.200900388] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In early studies of empirical structure-activity relationships, monodentate Pt(II) complexes were considered to be biologically inactive. Examples of such inactive monodentate Pt(II) compounds are [PtCl(dien)]+ (dien=diethylenetriamine) and [PtCl(NH3)3]+. DNA is considered the major biological target of platinum compounds. Thus, monodentate DNA binding of Pt(II) compounds was previously expected to display insignificant biological effects because it was assumed to affect DNA conformation and downstream cellular processes markedly less than the cross-links of bifunctional Pt(II) complexes. More recently it was shown that some monodentate Pt(II) complexes do exhibit biological effects; the active monodentate Pt(II) complexes commonly feature bulkier amine ligands than the hitherto used dien or NH(3) groups. We were therefore interested in determining whether a simple but marked enhancement of the bulkiness of the dien ligand in monodentate [Pt(NO3)(dien)]+ by multiple methylation of this ligand affects the early phases in which platinum compounds exert their biological activity. More specifically, the goals of this study, performed in cell-free media, were to determine how the modification of DNA duplexes by methylated analogues of [Pt(NO3)(dien)]+ affects their energetics and how the alterations of this biophysical parameter are reflected by the recognition of these duplexes by DNA polymerases and the DNA repair system. We have found that the impact of the methylation of [Pt(NO3)(dien)]+ on the biophysical properties of DNA (thermodynamic, thermal, and conformational properties) and its biochemical processes (DNA polymerization and the repair of DNA adducts) is remarkable. Hence, we conclude that monodentate DNA binding of Pt(II) compounds may considerably affect the biophysical properties of DNA and consequently downstream cellular processes as a result of a large increase in the bulkiness of the nonleaving ligands in this class of metal complex.
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Affiliation(s)
- Olga Nováková
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i. Kralovopolska 135, CZ-61265 Brno, Czech Republic
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Interaction of antitumor platinum complexes with human liver microsomal cytochromes P450. Anticancer Drugs 2009; 20:305-11. [PMID: 19378397 DOI: 10.1097/cad.0b013e328323a7a8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Interaction of nine human hepatic cytochromes P450 (CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4) with six platinum complexes was studied using pooled human microsomes. The compounds used were cisplatin, oxaliplatin, carboplatin, transplatin, and trans-[PtCl2(NH3) (Am)], where Am=2-methylbutylamine or sec-butylamine. No significant inhibition of all CYP activities by carboplatin was observed. With cisplatin and oxaliplatin, a minor inhibition of CYP2C9 enzyme (75% of control at 400 miromol/l of these complexes) was seen; cisplatin also inhibited slightly the CYP2B6 activity (85% of control). With respect to plasma levels of cisplatin obtained in clinical applications, these effects are probably not important. In contrast, clinically ineffective transplatin, inhibited the CYP2B6 as well as CYP2C9 activities significantly (to 50-35% of control at 100 micromol/l); also, an inhibition of CYP2E1 activity was found here (to 70% at 100 micromol/l). Two other derivatives of transplatin (new antitumor agents with trans geometry), inhibited CYP activities more strongly reaching nearly a complete inhibition of the respective CYP activities at concentration of 200 micromol/l. Half maximal inhibitory concentration values were found in the range of tens of micromol/l indicating that there is a possibility of potential interactions of these compounds with drugs metabolized by CYP3A4, CYP2E1, CYP2D6, CYP2C19, CYP2B6, CYP2A6, and CYP1A2. Interestingly, clinically non-significant inhibition was found with the CYP2C9 and CYP2C8 indicating low probability of interactions with, for example, warfarin. The results document that the new antitumor agents based on the transplatin should be more thoroughly tested for interactions with liver microsomal drug-metabolizing cytochromes P450.
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Abstract
Substitution of NH(3) by a range of amines in trans-[PtCl(2)(NH(3))(2)] produces compounds with cytotoxicity significantly improved over the parent transplatin and in many cases equivalent to that of cisplatin. This microreview summarizes the chemistry and biology of trans-platinum compounds containing principally planar amines and succinctly reviews the current status of anticancer relevance of the trans-platinum geometry. The nature of bifunctional DNA adducts (intrastrand, interstrand) is remarkably dependent on the nature of the amine. Further, the stability of monofunctional adducts allows for competitive production of DNA-protein crosslinks and overall the results suggest that the trans-platinum chemotype may offer significant potential for design of selective DNA-protein crosslinking agents. A subset of proteins known to bind to DNA modified by trans-platinum is that comprised of zinc fingers - model studies show the potential for formation of heteronuclear thiolate-bridged species as precedent for zinc displacement from the biomolecule.
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Affiliation(s)
- Sheena M Aris
- Department of Chemistry, Virginia Commonwealth University 1001 W. Main St., Richmond VA 23284-2006
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Halámiková A, Heringová P, Kašpárková J, Intini FP, Natile G, Nemirovski A, Gibson D, Brabec V. Cytotoxicity, mutagenicity, cellular uptake, DNA and glutathione interactions of lipophilic trans-platinum complexes tethered to 1-adamantylamine. J Inorg Biochem 2008; 102:1077-89. [DOI: 10.1016/j.jinorgbio.2007.12.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2007] [Revised: 12/07/2007] [Accepted: 12/14/2007] [Indexed: 11/26/2022]
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Mackay FS, Woods JA, Heringová P, Kašpárková J, Pizarro AM, Moggach SA, Parsons S, Brabec V, Sadler PJ. A potent cytotoxic photoactivated platinum complex. Proc Natl Acad Sci U S A 2007; 104:20743-8. [PMID: 18093923 PMCID: PMC2410072 DOI: 10.1073/pnas.0707742105] [Citation(s) in RCA: 256] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Indexed: 12/13/2022] Open
Abstract
We show by x-ray crystallography that the complex trans, trans, trans-[Pt(N(3))(2)(OH)(2)(NH(3))(py)] (1) contains an octahedral Pt(IV) center with almost linear azido ligands. Complex 1 is remarkably stable in the dark, even in the presence of cellular reducing agents such as glutathione, but readily undergoes photoinduced ligand substitution and photoreduction reactions. When 1 is photoactivated in cells, it is highly toxic: 13-80 x more cytotoxic than the Pt(II) anticancer drug cisplatin, and ca. 15 x more cytotoxic toward cisplatin-resistant human ovarian cancer cells. Cisplatin targets DNA, and DNA platination levels induced in HaCaT skin cells by 1 were similar to those of cisplatin. However, cisplatin forms mainly intrastrand cis diguanine cross-links on DNA between neighboring nucleotides, whereas photoactivated complex 1 rapidly forms unusual trans azido/guanine, and then trans diguanine Pt(II) adducts, which are probably mainly intrastrand cross-links between two guanines separated by a third base. DNA interstrand and DNA-protein cross-links were also detected. Importantly, DNA repair synthesis on plasmid DNA platinated by photoactivated 1 was markedly lower than for cisplatin or its isomer transplatin (an inactive complex). Single-cell electrophoresis experiments also demonstrated that the DNA damage is different from that induced by cisplatin or transplatin. Cell death is not solely dependent on activation of the caspase 3 pathway, and, in contrast to cisplatin, p53 protein did not accumulate in cells after photosensitization of 1. The trans diazido Pt(IV) complex 1 therefore has remarkable properties and is a candidate for use in photoactivated cancer chemotherapy.
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Affiliation(s)
- Fiona S. Mackay
- *School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
| | - Julie A. Woods
- Photobiology Unit, Department of Dermatology, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, United Kingdom
| | - Pavla Heringová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, CZ-61265 Brno, Czech Republic; and
| | - Jana Kašpárková
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, CZ-61265 Brno, Czech Republic; and
| | - Ana M. Pizarro
- *School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Stephen A. Moggach
- *School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
| | - Simon Parsons
- *School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, CZ-61265 Brno, Czech Republic; and
| | - Peter J. Sadler
- *School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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Ramos-Lima FJ, Quiroga AG, García-Serrelde B, Blanco F, Carnero A, Navarro-Ranninger C. Newtrans-Platinum Drugs with Phosphines and Amines as Carrier Ligands Induce Apoptosis in Tumor Cells Resistant to Cisplatin. J Med Chem 2007; 50:2194-9. [PMID: 17407274 DOI: 10.1021/jm061219c] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cisplatin resistance observed in some human tumors has prompted research in platinum derivatives that can circumvent this effect. Despite initial works reporting lack of activity of trans-platinum derivatives, complexes with the general formula PtCl2(L)(L') exhibit cytotoxic activity in cisplatin-sensitive and -resistant cell lines. Here we reported the chemical and biological properties of seven platinum complexes with PPh3 or PMe2Ph in trans to several amines. They show important antitumoral properties in tumor cell lines. Among the compounds, those with a replacement of an ammine ligand in the inactive trans-DDP by a phosphine ligand have an important enhancement of their cytotoxic activity. In SKOV3, no G1 nor G2/M accumulation was observed after treatments, and apoptosis was launched probably by a mechanism independent of classical checkpoints activation. Our data indicate that our compounds are not cross-resistant with cisplatin and might be promising agents in the treatment of tumors unresponsive to cisplatin.
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Aris SM, Gewirtz DA, Ryan JJ, Knott KM, Farrell NP. Promotion of DNA strand breaks, interstrand cross-links and apoptotic cell death in A2780 human ovarian cancer cells by transplatinum planar amine complexes. Biochem Pharmacol 2007; 73:1749-57. [PMID: 17418817 PMCID: PMC2716119 DOI: 10.1016/j.bcp.2007.02.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Revised: 02/22/2007] [Accepted: 02/23/2007] [Indexed: 11/23/2022]
Abstract
Cisplatin is one of the primary drugs utilized in the treatment of ovarian cancer. However, despite the initial effectiveness of chemotherapy in suppressing this disease, drug resistance almost invariably develops and cures are relatively rare. While it is generally thought that only compounds of the cis geometry express antitumor activity, a number of transplatinum derivates have shown preclinical promise. The current work investigates the influence of transplanaramine (TPA) compounds of structure trans-[Pt (O(2)CR)(2) (L) (L')], (L=NH(3), L'=pyridine, quinoline, isoquinoline; L=L'=pyridine; R=H, CH(3), CH(2)OH, etc.) (with a focus on the contribution of the carboxylate leaving group to drug action) on growth and viability of A2780 human ovarian carcinoma cells as well as their putative mechanism(s) of cytotoxicity. The compounds, as a class, induce cell death through caspase-dependent apoptosis, with activation of both caspase 3 and caspase 9 and concomitant PARP cleavage. The trans-platinum compounds tested show induction of p53 as well as time dependent gammaH2AX induction, consistent with the promotion of DNA lesions. trans-[Pt(O(2)CH)(2)(NH(3))(4-pic)] can be shown to promote significant DNA strand breaks and DNA interstrand cross-linking. The enhanced cytotoxicity of trans-[Pt(O(2)CH)(2)(NH(3))(4-pic)] compared to its isostructural -O(2)CCH(3) and -O(2)CCH(2)OH analogs may be a consequence of its accelerated cellular accumulation, increased hydrolytic activation, interstrand cross-linking and abortive efforts by the cell to repair the cross linked DNA.
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Affiliation(s)
- Sheena M. Aris
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA
| | - David A. Gewirtz
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA
- To whom correspondence should be addressed at Massey Cancer Center, Virginia Commonwealth University, P.O. Box 980035, Richmond, VA 23298, Phone: 804-828-9523, Fax: 804-827-1134, e-mail:
| | - John J. Ryan
- Department of Biology, Virginia Commonwealth University, Richmond, VA
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González-Vadillo AM, Alvarez-Valdés A, Moneo V, Blanco F, Díaz RG, Carnero A, Navarro-Ranninger C. Structure-activity relationship of new trans-platinum(II) and (IV) complexes with cyclohexylamine. Interference with cell cycle progression and induction of cell death. J Inorg Biochem 2006; 101:551-8. [PMID: 17257684 DOI: 10.1016/j.jinorgbio.2006.11.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 11/21/2006] [Accepted: 11/22/2006] [Indexed: 10/23/2022]
Abstract
The new trans-Pt complexes, derived from trans-[PtCl2(amine)(dimethylamine)] and trans-[PtCl2(OH)2(amine)(dimethylamine)], were synthesized and characterized studying the structure-activity relationship and testing their antiproliferative activity. Their evaluation as cytotoxic agents towards different cancer and normal cell lines is presented. These compounds are active in a panel of tumor cell lines at low micromolar range. Compounds seems to be more active in tumoral than in normal primary human cell lines. Cytotoxic activity is closely related to the amine ligand. Cyclohexylamine ligand was the most active among the amine-ligands tested. Cytotoxic activity correlates with an increase in annexin V positive cells indicating an apoptotic effect of the compounds. Mechanistically, the antitumor activity correlates with a blockade of the cell cycle in S phase and a complete abolishment of G2/M checkpoint arrest suggesting physical interaction of compound with DNA inhibiting S phase transition.
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Affiliation(s)
- Ana M González-Vadillo
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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27
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Momekov G, Momekova D. Recent developments in antitumour platinum coordination compounds. Expert Opin Ther Pat 2006. [DOI: 10.1517/13543776.16.10.1383] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Najajreh Y, Ardeli-Tzaraf Y, Kasparkova J, Heringova P, Prilutski D, Balter L, Jawbry S, Khazanov E, Perez JM, Barenholz Y, Brabec V, Gibson D. Interactions of platinum complexes containing cationic, bicyclic, nonplanar piperidinopiperidine ligands with biological nucleophiles. J Med Chem 2006; 49:4674-83. [PMID: 16854073 DOI: 10.1021/jm060238j] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The determination of the structures and DNA interactions and the reactions with GSH and ubiquitin of complexes of the general formula trans-[PtCl2(Am)(pip-pip)] x HCl, where pip-pip is 4-piperidinopiperidine and Am is NH3, methylamine (MA), dimethylamine (DMA), n-propylamine (NPA), isopropylamine (IPA), n-butylamine (NBA), or cyclohexylamine (CHA), were performed. X-ray structures and NMR studies of the NH3 and MA complexes showed that both pip rings were in the chair conformation and that the second pip ring is fluxional. The DNA binding studies showed that these complexes bind to calf thymus DNA nearly an order of magnitude more quickly than cisplatin and form covalent adducts that stabilize the double helix. The binding of the pip-pip complexes to DNA results in high unwinding angles (approximately 30 degrees) and in the formation of approximately 25% interstrand cross-links. The pip-pip complexes reacted with GSH more quickly than cisplatin and transplatin, and the rate of reaction decreased with increasing steric bulk of the ligand trans to the pip-pip. The reactions with ubiquitin resulted in monofunctional binding to Met1. Only the NH3, MA, and DMA complexes reacted with ubiquitin in a slower and less efficient fashion than cisplatin.
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Affiliation(s)
- Yousef Najajreh
- Department of Medicinal Chemistry and Natural Products, Faculty of Pharmacy, Al-Quds University, Jerusalem, P.O. Box 20002, Palestine
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Ramos-Lima FJ, Vrána O, Quiroga AG, Navarro-Ranninger C, Halámiková A, Rybnícková H, Hejmalová L, Brabec V. Structural characterization, DNA interactions, and cytotoxicity of new transplatin analogues containing one aliphatic and one planar heterocyclic amine ligand. J Med Chem 2006; 49:2640-51. [PMID: 16610807 DOI: 10.1021/jm0602514] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report in the present work new analogues of clinically ineffective transplatin in which one ammine group was replaced by aliphatic and the other by a planar heterocyclic ligand, namely trans-[PtCl(2)(isopropylamine)(3-(hydroxymethyl)-pyridine)], 1, and trans-[PtCl(2)(isopropylamine)(4-(hydroxymethyl)-pyridine)], 2. The new compounds, in comparison with parent transplatin, exhibit radically enhanced activity in tumor cell lines both sensitive and in particular resistant to cisplatin. Concomitantly, the DNA binding mode of 1 and 2 compared to parent transplatin and other antitumor analogues of transplatin in which only one ammine group was replaced is also different. The results also suggest that the reactions of glutathione and metallothionein-2 with compounds 1 and 2 do not play a crucial role in their overall biological effects. In addition, the monofunctional adducts of 1 and 2 are quenched by glutathione considerably less than the adducts of transplatin, which may potentiate cytotoxic effects of these new platinum complexes.
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Affiliation(s)
- Francisco J Ramos-Lima
- Institute of Biophysics, Academy of Sciences of the Czech Republic, CZ-61265 Brno, Czech Republic
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Stehlíková K, Kaspárková J, Nováková O, Martínez A, Moreno V, Brabec V. Recognition of DNA modified by trans-[PtClNH(4-hydroxymethylpyridine)] by tumor suppressor protein p53 and character of DNA adducts of this cytotoxic complex. FEBS J 2006; 273:301-14. [PMID: 16403018 DOI: 10.1111/j.1742-4658.2005.05061.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
trans-[PtCl(2)NH(3)(4-Hydroxymethylpyridine)] (trans-PtHMP) is an analogue of clinically ineffective transplatin, which is cytotoxic in the human leukemia cancer cell line. As DNA is a major pharmacological target of antitumor platinum compounds, modifications of DNA by trans-PtHMP and recognition of these modifications by active tumor suppressor protein p53 were studied in cell-free media using the methods of molecular biology and biophysics. Our results demonstrate that the replacement of the NH(3) group in transplatin by the 4-hydroxymethylpyridine ligand affects the character of DNA adducts of parent transplatin. The binding of trans-PtHMP is slower, although equally sequence-specific. This platinum complex also forms on double-stranded DNA stable intrastrand and interstrand cross-links, which distort DNA conformation in a unique way. The most pronounced conformational alterations are associated with a local DNA unwinding, which was considerably higher than those produced by other bifunctional platinum compounds. DNA adducts of trans-PtHMP also reduce the affinity of the p53 protein to its consensus DNA sequence. Thus, downstream effects modulated by recognition and binding of p53 protein to DNA distorted by trans-PtHMP and transplatin are not likely to be the same. It has been suggested that these different effects may contribute to different antitumor effects of these two transplatinum compounds.
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Affiliation(s)
- Kristýna Stehlíková
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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Quiroga AG, Pérez JM, Alonso C, Navarro-Ranninger C, Farrell N. Novel Transplatinum(II) Complexes with [N2O2] Donor Sets. Cellular Pharmacology and Apoptosis Induction in Pam 212-ras Cells. J Med Chem 2005; 49:224-31. [PMID: 16392807 DOI: 10.1021/jm050804v] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cellular pharmacological properties of eight trans-picoline platinum(II) complexes of formula trans-[PtX(2)(L)(L')], where X = Cl or CH(3)COO (OAc) and L = L' = 3-picoline (3-pic), 4-picoline (4-pic) or L = NH(3) and L' = 3-pic or 4-pic, were investigated in murine keratinocyte Pam 212 cells and Pam 212-ras cells, murine tumor keratinocytes derived from transformation with a viral vector containing the H-ras oncogene. The derivatives trans-[Pt(OAc)(2)(L)(L')] (L = L' = 3-pic, 9, and L = L' = 4-pic, 10) were able to circumvent resistance in Pam 212-ras cells. Although all the trans-picoline platinum(II) acetate derivatives showed a similar level of DNA binding, there were remarkable differences in cellular accumulation: the complexes having two picoline ligands (9, 10) had a much higher intracellular accumulation than those having mixed picoline and ammine ligands (11, 12). No significant differences in cellular pharmacological properties have been observed between isomers having 3- or 4-picoline.
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Affiliation(s)
- Adoración G Quiroga
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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Brabec V, Kasparkova J. Modifications of DNA by platinum complexes. Relation to resistance of tumors to platinum antitumor drugs. Drug Resist Updat 2005; 8:131-46. [PMID: 15894512 DOI: 10.1016/j.drup.2005.04.006] [Citation(s) in RCA: 301] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2005] [Revised: 04/11/2005] [Accepted: 04/11/2005] [Indexed: 11/26/2022]
Abstract
The importance of platinum drugs in cancer chemotherapy is underscored by the clinical success of cisplatin [cis-diamminedichloroplatinum(II)] and its analogues and by clinical trials of other, less toxic platinum complexes that are active against resistant tumors. The antitumor effect of platinum complexes is believed to result from their ability to form various types of adducts with DNA. Nevertheless, drug resistance can occur by several ways: increased drug efflux, drug inactivation, alterations in drug target, processing of drug-induced damage, and evasion of apoptosis. This review focuses on mechanisms of resistance and sensitivity of tumors to conventional cisplatin associated with DNA modifications. We also discuss molecular mechanisms underlying resistance and sensitivity of tumors to the new platinum compounds synthesized with the goal to overcome resistance of tumors to established platinum drugs. Importantly, a number of new platinum compounds were designed to test the hypothesis that there is a correlation between the extent of resistance of tumors to these agents and their ability to induce a certain kind of damage or conformational change in DNA. Hence, information on DNA-binding modes, as well as recognition and repair of DNA damage is discussed, since this information may be exploited for improved structure-activity relationships.
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Affiliation(s)
- Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, CZ-61265 Brno, Czech Republic.
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Nguewa PA, Fuertes MA, Iborra S, Najajreh Y, Gibson D, Martínez E, Alonso C, Pérez JM. Water soluble cationic trans-platinum complexes which induce programmed cell death in the protozoan parasite Leishmania infantum. J Inorg Biochem 2005; 99:727-36. [PMID: 15708793 DOI: 10.1016/j.jinorgbio.2004.12.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2004] [Revised: 11/29/2004] [Accepted: 12/02/2004] [Indexed: 10/26/2022]
Abstract
We have evaluated the cytotoxic properties against the protozoan Leishmania infantum of four water soluble cationic trans-Pt(II)Cl(2) compounds containing as inert groups NH3 and piperazine (1), 4-picoline and piperazine (2), n-butylamine and piperazine (3), and NH3 and 4-piperidino-piperidine (4). The leishmanicidal activity of compounds 3 and 4 against promastigotes of the parasite Leishmania infantum was 2.5- and 1.6-times higher than that of the cytotoxic drug cis-diamminedichloroplatinum(II), respectively. Interestingly, compounds 3 and 4 produce in Leishmania infantum promastigotes a higher amount of programmed cell death than cisplatin, which is associated with cell cycle arrest in G2/M. In contrast to cis-diamminedichloroplatinum(II), binding of compounds 3 and 4 to calf thymus DNA induces conformational changes more similar to those of trans-diamminedichloroplatinum(II) that may be attributed to denaturation of the double helix. Similarly to cis-diamminedichloroplatinum(II) and trans-diamminedichloroplatinum(II), the interaction of compounds 3 and 4 with ubiquitin results in an increase of the alpha-helix content of the protein as observed by circular dichroism spectroscopy. However, fluorescence studies indicate that compounds 3 and 4 produce a decrease in the fluorescence of the tyrosine 59 residue of ubiquitin higher than both cis-diamminedichloroplatinum(II) and trans-diamminedichloroplatinum(II). Altogether, our results suggest that the biochemical mechanism of cytotoxic activity of compounds 3 and 4 against Leishmania infantum must be different from that of cis-diamminedichloroplatinum(II). To the best of our knowledge, compounds 3 and 4 are the first reported trans-platinum complexes that show antiparasitic activity.
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Affiliation(s)
- Paul A Nguewa
- Departamento de Parasitología, Facultad de Farmacia, Universidad de la Laguna, Tenerife, Spain
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