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de la Cueva-Alique I, de la Torre-Rubio E, Muñoz L, Calvo-Jareño A, Perez-Redondo A, Gude L, Cuenca T, Royo E. Stereoselective synthesis of oxime containing Pd(II) compounds: Highly effective, selective and stereo-regulated cytotoxicity against carcinogenic PC-3 cells. Dalton Trans 2022; 51:12812-12828. [DOI: 10.1039/d2dt01403c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New palladium compounds [Pd{(1S,4R)-NOH^NH(R)}Cl2] (R = Ph 1a or Bn 1b), [Pd{(1S,4R)-NOH^NH(R)}{(1S,4R)-NO^NH(R)}][Cl] (R = Ph 2a or Bn 2b) and corresponding [Pd{(1R,4S)-NOH^NH(R)}Cl2] (R = Ph 1a’ or Bn 1b’) and...
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Hreusova M, Brabec V, Novakova O. Processing and Bypass of a Site-Specific DNA Adduct of the Cytotoxic Platinum-Acridinylthiourea Conjugate by Polymerases Involved in DNA Repair: Biochemical and Thermodynamic Aspects. Int J Mol Sci 2021; 22:ijms221910838. [PMID: 34639179 PMCID: PMC8509567 DOI: 10.3390/ijms221910838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 11/24/2022] Open
Abstract
DNA-dependent DNA and RNA polymerases are important modulators of biological functions such as replication, transcription, recombination, or repair. In this work performed in cell-free media, we studied the ability of selected DNA polymerases to overcome a monofunctional adduct of the cytotoxic/antitumor platinum–acridinylthiourea conjugate [PtCl(en)(L)](NO3)2 (en = ethane-1,2-diamine, L = 1-[2-(acridin-9-ylamino)ethyl]-1,3-dimethylthiourea) (ACR) in its favored 5′-CG sequence. We focused on how a single site-specific ACR adduct with intercalation potency affects the processivity and fidelity of DNA-dependent DNA polymerases involved in translesion synthesis (TLS) and repair. The ability of the G(N7) hybrid ACR adduct formed in the 5′-TCGT sequence of a 24-mer DNA template to inhibit the synthesis of a complementary DNA strand by the exonuclease-deficient Klenow fragment of DNA polymerase I (KFexo−) and human polymerases eta, kappa, and iota was supplemented by thermodynamic analysis of the polymerization process. Thermodynamic parameters of a simulated translesion synthesis across the ACR adduct were obtained by using microscale thermophoresis (MST). Our results show a strong inhibitory effect of an ACR adduct on enzymatic TLS: there was only small synthesis of a full-length product (less than 10%) except polymerase eta (~20%). Polymerase eta was able to most efficiently bypass the ACR hybrid adduct. Incorporation of a correct dCMP opposite the modified G residue is preferred by all the four polymerases tested. On the other hand, the frequency of misinsertions increased. The relative efficiency of misinsertions is higher than that of matched cytidine monophosphate but still lower than for the nonmodified control duplex. Thermodynamic inspection of the simulated TLS revealed a significant stabilization of successively extended primer/template duplexes containing an ACR adduct. Moreover, no significant decrease of dissociation enthalpy change behind the position of the modification can contribute to the enzymatic TLS observed with the DNA-dependent, repair-involved polymerases. This TLS could lead to a higher tolerance of cancer cells to the ACR conjugate compared to its enhanced analog, where thiourea is replaced by an amidine group: [PtCl(en)(L)](NO3)2 (complex AMD, en = ethane-1,2-diamine, L = N-[2-(acridin-9-ylamino)ethyl]-N-methylpropionamidine).
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Affiliation(s)
- Monika Hreusova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ 61265 Brno, Czech Republic; (M.H.); (V.B.)
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ 61265 Brno, Czech Republic; (M.H.); (V.B.)
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, CZ 78371 Olomouc, Czech Republic
| | - Olga Novakova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ 61265 Brno, Czech Republic; (M.H.); (V.B.)
- Correspondence: ; Tel.: +420-541-517-135
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Hreusova M, Novakova O, Brabec V. Thermodynamic Insights by Microscale Thermophoresis into Translesion DNA Synthesis Catalyzed by DNA Polymerases Across a Lesion of Antitumor Platinum-Acridine Complex. Int J Mol Sci 2020; 21:ijms21207806. [PMID: 33096927 PMCID: PMC7589001 DOI: 10.3390/ijms21207806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 11/16/2022] Open
Abstract
Translesion synthesis (TLS) through DNA adducts of antitumor platinum complexes has been an interesting aspect of DNA synthesis in cells treated with these metal-based drugs because of its correlation to drug sensitivity. We utilized model systems employing a DNA lesion derived from a site-specific monofunctional adduct formed by antitumor [PtCl(en)(L)](NO3)2 (complex AMD, en = ethane-1,2-diamine, L = N-[2-(acridin-9-ylamino)ethyl]-N-methylpropionamidine) at a unique G residue. The catalytic efficiency of TLS DNA polymerases, which differ in their processivity and fidelity for the insertion of correct dCTP, with respect to the other incorrect nucleotides, opposite the adduct of AMD, was investigated. For a deeper understanding of the factors that control the bypass of the site-specific adducts of AMD catalyzed by DNA polymerases, we also used microscale thermophoresis (MST) to measure the thermodynamic changes associated with TLS across a single, site-specific adduct formed in DNA by AMD. The relative catalytic efficiency of the investigated DNA polymerases for the insertion of correct dCTP, with respect to the other incorrect nucleotides, opposite the AMD adduct, was reduced. Nevertheless, incorporation of the correct C opposite the G modified by AMD of the template strand was promoted by an increasing thermodynamic stability of the resulting duplex. The reduced relative efficiency of the investigated DNA polymerases may be a consequence of the DNA intercalation of the acridine moiety of AMD and the size of the adduct. The products of the bypass of this monofunctional lesion produced by AMD and DNA polymerases also resulted from the misincorporation of dNTPs opposite the platinated G residues. The MST analysis suggested that thermodynamic factors may contribute to the forces that governed enhanced incorporation of the incorrect dNTPs by DNA polymerases.
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Affiliation(s)
- Monika Hreusova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic; (M.H.); (O.N.)
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, CZ 78371 Olomouc, Czech Republic
| | - Olga Novakova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic; (M.H.); (O.N.)
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic; (M.H.); (O.N.)
- Correspondence: ; Tel.: +420-541-517-148
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Translesion DNA Synthesis Across Lesions Induced by Oxidative Products of Pyrimidines: An Insight into the Mechanism by Microscale Thermophoresis. Int J Mol Sci 2019; 20:ijms20205012. [PMID: 31658654 PMCID: PMC6829345 DOI: 10.3390/ijms20205012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 01/02/2023] Open
Abstract
Oxidative stress in cells can lead to the accumulation of reactive oxygen species and oxidation of DNA precursors. Oxidized nucleotides such as 2'-deoxyribo-5-hydroxyuridin (HdU) and 2'-deoxyribo-5-hydroxymethyluridin (HMdU) can be inserted into DNA during replication and repair. HdU and HMdU have attracted particular interest because they have different effects on damaged-DNA processing enzymes that control the downstream effects of the lesions. Herein, we studied the chemically simulated translesion DNA synthesis (TLS) across the lesions formed by HdU or HMdU using microscale thermophoresis (MST). The thermodynamic changes associated with replication across HdU or HMdU show that the HdU paired with the mismatched deoxyribonucleoside triphosphates disturbs DNA duplexes considerably less than thymidine (dT) or HMdU. Moreover, we also demonstrate that TLS by DNA polymerases across the lesion derived from HdU was markedly less extensive and potentially more mutagenic than that across the lesion formed by HMdU. Thus, DNA polymerization by DNA polymerase η (polη), the exonuclease-deficient Klenow fragment of DNA polymerase I (KF-), and reverse transcriptase from human immunodeficiency virus type 1 (HIV-1 RT) across these pyrimidine lesions correlated with the different stabilization effects of the HdU and HMdU in DNA duplexes revealed by MST. The equilibrium thermodynamic data obtained by MST can explain the influence of the thermodynamic alterations on the ability of DNA polymerases to bypass lesions induced by oxidative products of pyrimidines. The results also highlighted the usefulness of MST in evaluating the impact of oxidative products of pyrimidines on the processing of these lesions by damaged DNA processing enzymes.
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de la Cueva-Alique I, Muñoz-Moreno L, de la Torre-Rubio E, Bajo AM, Gude L, Cuenca T, Royo E. Water soluble, optically active monofunctional Pd(ii) and Pt(ii) compounds: promising adhesive and antimigratory effects on human prostate PC-3 cancer cells. Dalton Trans 2019; 48:14279-14293. [DOI: 10.1039/c9dt02873k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water soluble, enantiomerically pure “rule breakers” Pd(ii) and Pt(ii) compounds with promising anticancer potential are reported.
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Affiliation(s)
- Isabel de la Cueva-Alique
- Departamento de Química Orgánica y Química Inorgánica
- Instituto de Investigación en Química Andrés M. del Río (IQAR)
- Universidad de Alcalá
- Madrid
- Spain
| | - Laura Muñoz-Moreno
- Departamento de Biología de Sistemas
- Facultad de Medicina y Ciencias de la Salud
- Universidad de Alcalá
- Madrid
- Spain
| | - Elena de la Torre-Rubio
- Departamento de Química Orgánica y Química Inorgánica
- Instituto de Investigación en Química Andrés M. del Río (IQAR)
- Universidad de Alcalá
- Madrid
- Spain
| | - Ana M. Bajo
- Departamento de Biología de Sistemas
- Facultad de Medicina y Ciencias de la Salud
- Universidad de Alcalá
- Madrid
- Spain
| | - Lourdes Gude
- Departamento de Química Orgánica y Química Inorgánica
- Instituto de Investigación en Química Andrés M. del Río (IQAR)
- Universidad de Alcalá
- Madrid
- Spain
| | - Tomás Cuenca
- Departamento de Química Orgánica y Química Inorgánica
- Instituto de Investigación en Química Andrés M. del Río (IQAR)
- Universidad de Alcalá
- Madrid
- Spain
| | - Eva Royo
- Departamento de Química Orgánica y Química Inorgánica
- Instituto de Investigación en Química Andrés M. del Río (IQAR)
- Universidad de Alcalá
- Madrid
- Spain
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6
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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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Lemmerhirt H, Behnisch S, Bodtke A, Lillig CH, Pazderova L, Kasparkova J, Brabec V, Bednarski PJ. Effects of cytotoxic cis- and trans-diammine monochlorido platinum(II) complexes on selenium-dependent redox enzymes and DNA. J Inorg Biochem 2017; 178:94-105. [PMID: 29125948 DOI: 10.1016/j.jinorgbio.2017.10.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 10/16/2017] [Accepted: 10/25/2017] [Indexed: 11/16/2022]
Abstract
Here we present the preparation of 14 pairs of cis- and trans-diammine monochlorido platinum(II) complexes, coordinated to heterocycles (i.e., imidazole, 2-methylimidazole and pyrazole) and linked to various acylhydrazones, which were designed as potential inhibitors of the selenium-dependent enzymes glutathione peroxidase 1 (GPx-1) and thioredoxin reductase 1 (TrxR-1). However, no inhibition of bovine GPx-1 and only weak inhibition of murine TrxR-1 was observed in in vitro assays. Nonetheless, the cis configured diammine monochlorido Pt(II) complexes exhibited cytotoxic and apoptotic properties on various human cancer cell lines, whereas the trans configured complexes generally showed weaker potency with a few exceptions. On the other hand, the trans complexes were generally more likely to lack cross-resistance to cisplatin than the cis analogues. Platinum was found bound to the nuclear DNA of cancer cells treated with representative Pt complexes, suggesting that DNA might be a possible target. Thus, detailed in vitro binding experiments with DNA were conducted. Interactions of the compounds with calf thymus DNA were investigated, including Pt binding kinetics, circular dichroism (CD) spectral changes, changes in DNA melting temperatures, unwinding of supercoiled plasmids and ethidium bromide displacement in DNA. The CD results indicate that the most active cis configured pyrazole-derived complex causes unique structural changes in the DNA compared to the other complexes as well as to those caused by cisplatin, suggesting a denaturation of the DNA structure. This may be important for the antiproliferative activity of this compound in the cancer cells.
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Affiliation(s)
- Heidi Lemmerhirt
- Institute of Pharmacy, Ernst-Moritz-Arndt University of Greifswald, 17487 Greifswald, Germany
| | - Steven Behnisch
- Institute of Pharmacy, Ernst-Moritz-Arndt University of Greifswald, 17487 Greifswald, Germany
| | - Anja Bodtke
- Institute of Pharmacy, Ernst-Moritz-Arndt University of Greifswald, 17487 Greifswald, Germany
| | - Christopher H Lillig
- Institute of Medical Biochemistry and Molecular Biology, Ernst-Moritz-Arndt University of Greifswald, 17475 Greifswald, Germany
| | - Lucia Pazderova
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 78371 Olomouc, Czech Republic
| | - Jana Kasparkova
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 78371 Olomouc, Czech Republic
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno, Czech Republic
| | - Patrick J Bednarski
- Institute of Pharmacy, Ernst-Moritz-Arndt University of Greifswald, 17487 Greifswald, Germany.
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Chen Z, Zhang S, Zhang J, Zhu Z. Enhanced anti-cancer efficacy to cancer cells by a novel monofunctional mononuclear platinum(ii) complex containing a mixed S,N,S-donor ligand. NEW J CHEM 2017. [DOI: 10.1039/c7nj01472d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A novel platinum–intercalator hybrid complex (1) exhibits a cytotoxicity comparable to that of cisplatin against MCF-7 cell lines, and more potent activities against HeLa and A-549 cell lines, especially against the former.
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Affiliation(s)
- Zhanfen Chen
- Flexible Display Mater. & Tech. Co-Innovation Center of Hubei
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- School of Chemistry and Environmental Engineering
- Jianghan University
- Wuhan 430056
| | - Shuping Zhang
- College of Chemistry & Chemical Engineering
- Hubei Normal University
- Huangshi 435002
- P. R. China
| | - Jian Zhang
- College of Chemistry & Chemical Engineering
- Hubei Normal University
- Huangshi 435002
- P. R. China
| | - Zhenzhu Zhu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210017
- P. R. China
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Xue X, Zhu C, Chen H, Bai Y, Shi X, Jiao Y, Chen Z, Miao Y, He W, Guo Z. A New Approach to Sensitize Antitumor Monofunctional Platinum(II) Complexes via Short Time Photo-Irradiation. Inorg Chem 2016; 56:3754-3762. [DOI: 10.1021/acs.inorgchem.6b02148] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuling Xue
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Chengcheng Zhu
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Huachao Chen
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yang Bai
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Xiangchao Shi
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yang Jiao
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Zhongyan Chen
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yupeng Miao
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Weijiang He
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Zijian Guo
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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Wang Z, Yu H, Gou S, Chen F, Fang L. Design, Synthesis, and Biological Features of Platinum(II) Complexes with Rigid Steric Hindrance. Inorg Chem 2016; 55:4519-28. [PMID: 27074104 DOI: 10.1021/acs.inorgchem.6b00361] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of platinum(II) complexes, with N-monosubstituted 1R,2R-diaminocyclohexane bearing methoxy-substituted benzyl groups as carrier ligands, were designed and synthesized. The newly prepared compounds, with chloride anions as leaving groups, were found to be very active against the tested cancer cell lines, including a cisplatin-resistant cell line. Despite their efficacy against tumor cells, they also showed low toxicity to a human normal liver cell line. Among them, complex 1 had superior cytotoxic activity against A549, HCT-116, MCF-7, SGC7901, and SGC7901/CDDP cancer cell lines. The DNA binding assay is of further special interest, as an unusual monofunctional binding mode was found, due to the introduction of a rigid substituted aromatic ring in the 1R,2R-diaminocyclohexane framework as steric hindrance. The linkage of complex 1 with DNA was stable and insensitive to nucleophilic attack. Moreover, studies including cellular uptake, gel electrophoresis, apoptosis and cell cycle, and Western blot analysis have provided insight into the high potency of this compound.
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Affiliation(s)
- Zhimei Wang
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering and ‡Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University , Nanjing 211189, China
| | - Haiyan Yu
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering and ‡Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University , Nanjing 211189, China
| | - Shaohua Gou
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering and ‡Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University , Nanjing 211189, China
| | - Feihong Chen
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering and ‡Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University , Nanjing 211189, China
| | - Lei Fang
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering and ‡Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University , Nanjing 211189, China
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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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Malina J, Natile G, Brabec V. Spontaneous Translocation of Antitumor Oxaliplatin, its Enantiomeric Analogue, and Cisplatin from One Strand to Another in Double-Helical DNA. Chemistry 2013; 19:11984-91. [DOI: 10.1002/chem.201300946] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/22/2013] [Indexed: 11/11/2022]
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13
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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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14
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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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15
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Malina J, Kasparkova J, Farrell NP, Brabec V. Walking of antitumor bifunctional trinuclear PtII complex on double-helical DNA. Nucleic Acids Res 2010; 39:720-8. [PMID: 20833634 PMCID: PMC3025560 DOI: 10.1093/nar/gkq803] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The trinuclear BBR3464 ([{trans-PtCl(NH3)2}2µ-(trans-Pt(NH3)2(H2N(CH2)6NH2)2)]4+) belongs to the polynuclear class of platinum-based anticancer agents. DNA adducts of this complex differ significantly in structure and type from those of clinically used mononuclear platinum complexes, especially, long-range (Pt, Pt) intrastrand and interstrand cross-links are formed in both 5′–5′ and 3′–3′ orientations. We show employing short oligonucleotide duplexes containing single, site-specific cross-links of BBR3464 and gel electrophoresis that in contrast to major DNA adducts of clinically used platinum complexes, under physiological conditions the coordination bonds between platinum and N7 of G residues involved in the cross-links of BBR3464 can be cleaved. This cleavage may lead to the linkage isomerization reactions between this metallodrug and double-helical DNA. Differential scanning calorimetry of duplexes containing single, site-specific cross-links of BBR3464 reveals that one of the driving forces that leads to the lability of DNA cross-links of this metallodrug is a difference between the thermodynamic destabilization induced by the cross-link and by the adduct into which it could isomerize. The rearrangements may proceed in the way that cross-links originally formed in one strand of DNA can spontaneously translocate from one DNA strand to its complementary counterpart, which may evoke walking of the platinum complex on DNA molecule.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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Novakova O, Malina J, Suchankova T, Kasparkova J, Bugarcic T, Sadler PJ, Brabec V. Energetics, conformation, and recognition of DNA duplexes modified by monodentate Ru(II) complexes containing terphenyl arenes. Chemistry 2010; 16:5744-54. [PMID: 20376825 DOI: 10.1002/chem.200903078] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We studied the thermodynamic properties, conformation, and recognition of DNA duplexes site-specifically modified by monofunctional adducts of Ru(II) complexes of the type [Ru(II)(eta(6)-arene)(Cl)(en)](+), in which arene=para-, meta-, or ortho-terphenyl (complexes 1, 2, and 3, respectively) and en=1,2-diaminoethane. It has been shown (J. Med. Chem. 2008, 51, 5310) that 1 exhibits promising cytotoxic effects in human tumor cells, whereas 2 and 3 are much less cytotoxic; concomitantly with the high cytotoxicity of 1, its DNA binding mode involves combined intercalative and monofunctional (coordination) binding modes, whereas less cytotoxic compounds 2 and 3 bind to DNA only through a monofunctional coordination to DNA bases. An analysis of conformational distortions induced in DNA by adducts of 1 and 2 revealed more extensive and stronger distortion and concomitantly greater thermodynamic destabilization of DNA by the adducts of nonintercalating 2. Moreover, affinity of replication protein A to the DNA duplex containing adduct of 1 was pronouncedly lower than to the adduct of 2. On the other hand, another damaged-DNA-binding protein, xeroderma pigmentosum protein A, did not recognize the DNA adduct of 1 or 2. Importantly, the adducts of 1 induced a considerably lower level of repair synthesis than the adducts of 2, which suggests enhanced persistence of the adducts of the more potent and intercalating 1 in comparison with the adducts of the less potent and nonintercalating 2. Also interestingly, the adducts of 1 inhibited DNA polymerization more efficiently than the adducts of 2, and they could also be bypassed by DNA polymerases with greater difficulty. Results of the present work along with those previously published support the view that monodentate Ru(II) arene complexes belong to a class of anticancer agents for which structure-pharmacological relationships might be correlated with their DNA-binding modes.
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Affiliation(s)
- Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 61265 Brno, Czech Republic
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X-ray structure and mechanism of RNA polymerase II stalled at an antineoplastic monofunctional platinum-DNA adduct. Proc Natl Acad Sci U S A 2010; 107:9584-9. [PMID: 20448203 DOI: 10.1073/pnas.1002565107] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
DNA is a major target of anticancer drugs. The resulting adducts interfere with key cellular processes, such as transcription, to trigger downstream events responsible for drug activity. cis-Diammine(pyridine)chloroplatinum(II), cDPCP or pyriplatin, is a monofunctional platinum(II) analogue of the widely used anticancer drug cisplatin having significant anticancer properties with a different spectrum of activity. Its novel structure-activity properties hold promise for overcoming drug resistance and improving the spectrum of treatable cancers over those responsive to cisplatin. However, the detailed molecular mechanism by which cells process DNA modified by pyriplatin and related monofunctional complexes is not at all understood. Here we report the structure of a transcribing RNA polymerase II (pol II) complex stalled at a site-specific monofunctional pyriplatin-DNA adduct in the active site. The results reveal a molecular mechanism of pol II transcription inhibition and drug action that is dramatically different from transcription inhibition by cisplatin and UV-induced 1,2-intrastrand cross-links. Our findings provide insight into structure-activity relationships that may apply to the entire family of monofunctional DNA-damaging agents and pave the way for rational improvement of monofunctional platinum anticancer drugs.
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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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