1
|
An experimental and Theoretical Approach of Coordination compounds derived from meso-tetra(thiophen-2-yl)porphyrin: DNA interactions and cytotoxicity. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
2
|
de Andrade Querino AL, da Silva JT, Silva JT, Alvarenga GM, da Silveira CH, de Magalhães MTQ, Chaves OA, Iglesias BA, Diniz R, Silva H. Mono and dinuclear platinum and palladium complexes containing adamantane–azole ligands: DNA and BSA interaction and cytotoxicity. J Biol Inorg Chem 2019; 24:1087-1103. [DOI: 10.1007/s00775-019-01719-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/13/2019] [Indexed: 01/01/2023]
|
3
|
Wang Q, Yang L, Wu J, Wang H, Song J, Tang X. Four mononuclear platinum(II) complexes: synthesis, DNA/BSA binding, DNA cleavage and cytotoxicity. Biometals 2016; 30:17-26. [DOI: 10.1007/s10534-016-9984-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 12/03/2016] [Indexed: 12/19/2022]
|
4
|
Almeida JDC, Paixão DA, Marzano IM, Ellena J, Pivatto M, Lopes NP, Ferreira AMD, Pereira-Maia EC, Guilardi S, Guerra W. Copper(II) complexes with β-diketones and N-donor heterocyclic ligands: Crystal structure, spectral properties, and cytotoxic activity. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.12.026] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
5
|
do Couto Almeida J, Marzano I, de Paula FS, Pivatto M, Lopes N, de Souza P, Pavan F, Formiga A, Pereira-Maia E, Guerra W. Complexes of platinum and palladium with β-diketones and DMSO: Synthesis, characterization, molecular modeling, and biological studies. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.07.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
6
|
Shao J, Bao WG, Tian H, Li B, Zhao XF, Qiao X, Xu JY. Nuclease activity and protein-binding properties of a novel tetranuclear thiosemicarbazide Pt(ii) complex. Dalton Trans 2014; 43:1663-71. [DOI: 10.1039/c3dt52044g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
7
|
Schneider V, Krieger ML, Bendas G, Jaehde U, Kalayda GV. Contribution of intracellular ATP to cisplatin resistance of tumor cells. J Biol Inorg Chem 2013; 18:165-174. [PMID: 23183891 DOI: 10.1007/s00775-012-0960-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Accepted: 11/05/2012] [Indexed: 01/12/2023]
Abstract
Decreased cellular accumulation of cisplatin is a frequently observed mechanism of resistance to the drug. Beside passive diffusion, several cellular proteins using ATP hydrolysis as an energy source are assumed to be involved in cisplatin transport in and out of the cell. This investigation aimed at clarifying the contribution of intracellular ATP as an indicator of energy-dependent transport to cisplatin resistance using the A2780 human ovarian adenocarcinoma cell line and its cisplatin-resistant variant A2780cis. Depletion of intracellular ATP with oligomycin significantly decreased cellular platinum accumulation (measured by flameless atomic absorption spectrometry) in sensitive but not in resistant cells, and did not affect cisplatin efflux in both cell lines. Inhibition of Na(+),K(+)-ATPase with ouabain reduced platinum accumulation in A2780 cells but to a lesser extent compared with oligomycin. Western blot analysis revealed lower expression of Na(+),K(+)-ATPase α(1) subunit in resistant cells compared with sensitive counterparts. The basal intracellular ATP level (determined using a bioluminescence-based assay) was significantly higher in A2780cis cells than in A2780 cells. Our results highlight the importance of ATP-dependent transport, among other processes mediated by Na(+),K(+)-ATPase, for cisplatin influx in sensitive cells. Cellular platinum accumulation in resistant cells is reduced and less dependent on energy sources, which may partly result from Na(+),K(+)-ATPase downregulation. Our data suggest the involvement of other ATP-dependent processes beside those regulated by Na(+),K(+)-ATPase. Higher basal ATP level in cisplatin-resistant cells, which appears to be a consequence of enhanced mitochondrial ATP production, may represent a survival mechanism established during development of resistance.
Collapse
Affiliation(s)
- Verena Schneider
- Department of Clinical Pharmacy, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Michaela L Krieger
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Gerd Bendas
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Ulrich Jaehde
- Department of Clinical Pharmacy, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Ganna V Kalayda
- Department of Clinical Pharmacy, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany.
| |
Collapse
|
8
|
Carrier-based intralymphatic cisplatin chemotherapy for the treatment of metastatic squamous cell carcinoma of the head & neck. Ther Deliv 2012; 1:237-45. [PMID: 21339844 DOI: 10.4155/tde.10.38] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Since head and neck squamous cell carcinoma (HNSCC) preferentially metastasizes to the locoregional lymphatics, treatment of the tumor-draining cervical lymph nodes is paramount. RESULTS We developed a hyaluronan-cisplatin (HA-Pt) nanoconjugate with prolonged lymphatic retention and greatly improved tumor tissue deposition for the treatment of metastatic HNSCC. We also developed an orthotopic metastatic xenograft model of HNSCC to examine the efficacy of the nanoconjugate. HNSCC (1/week x 3 weeks) were completely cured for 57% of the female mice in the HA-Pt treatment group, which demonstrated greatly hindered HNSCC progression compared with the standard cisplatin therapy (p < 0.05). CONCLUSION With this insight, we will be able to optimize the carriers for better uptake, penetration and retention within cancer cells.
Collapse
|
9
|
Di Pasqua AJ, Goodisman J, Dabrowiak JC. Understanding how the platinum anticancer drug carboplatin works: From the bottle to the cell. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.01.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Effect of reactivity on cellular accumulation and cytotoxicity of oxaliplatin analogues. J Biol Inorg Chem 2012; 17:699-708. [PMID: 22456982 DOI: 10.1007/s00775-012-0889-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Accepted: 03/03/2012] [Indexed: 01/12/2023]
Abstract
The purpose of this study was to systematically investigate the relationships between reactivity, cellular accumulation, and cytotoxicity of a panel of oxaliplatin analogues with different leaving groups in human carcinoma cells. The reactivity of the complexes towards the nucleotides 2'-deoxyguanosine 5'-monophosphate and 2'-deoxyadenosine 5'-monophosphate was studied using capillary electrophoresis. Cellular accumulation and cytotoxicity were measured in an oxaliplatin-sensitive and oxaliplatin-resistant ileocecal colorectal adenocarcinoma cell line pair (HCT-8/HCT-8ox). Platinum concentrations were determined by flameless atomic absorption spectrometry. The 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay was used to assess cytotoxicity. Early cellular platinum accumulation was predominantly affected by lipophilicity. A relationship between reactivity and cellular accumulation was observed for three of four platinum complexes investigated, whereas the most lipophilic oxaliplatin analogue was an exception. Increased reactivity and reduced lipophilicity were associated with high cytotoxic activity. Resistance was influenced by lipophilicity but not by reactivity. The observed relationships may help in the design of analogues with high antitumoral activity in oxaliplatin-sensitive as well as oxaliplatin-resistant cells.
Collapse
|
11
|
Rey NA, Neves A, Silva PP, Paula FC, Silveira JN, Botelho FV, Vieira LQ, Pich CT, Terenzi H, Pereira-Maia EC. A synthetic dinuclear copper(II) hydrolase and its potential as antitumoral: Cytotoxicity, cellular uptake, and DNA cleavage. J Inorg Biochem 2009; 103:1323-30. [DOI: 10.1016/j.jinorgbio.2009.05.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2008] [Revised: 04/21/2009] [Accepted: 05/08/2009] [Indexed: 11/30/2022]
|
12
|
Dans PD, Coitiño EL. Density Functional Theory Characterization and Descriptive Analysis of Cisplatin and Related Compounds. J Chem Inf Model 2009; 49:1407-19. [DOI: 10.1021/ci800421w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pablo D. Dans
- Laboratorio de Química Teórica y Computacional (LQTC), Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República (UdelaR), Iguá 4225, 11400 Montevideo, Uruguay
| | - E. Laura Coitiño
- Laboratorio de Química Teórica y Computacional (LQTC), Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República (UdelaR), Iguá 4225, 11400 Montevideo, Uruguay
| |
Collapse
|
13
|
de Paula F, Guerra W, Silva I, Silveira J, Botelho F, Vieira L, Pereira-Maia E. Cytotoxicity and Cellular Accumulation of Palladium(II) Complexes of Tetracyclines. Chem Biodivers 2008; 5:2124-2130. [DOI: 10.1002/cbdv.200890193] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Salerno M, Yahia D, Dzamitika S, de Vries E, Pereira-Maia E, Garnier-Suillerot A. Impact of intracellular chloride concentration on cisplatin accumulation in sensitive and resistant GLC4 cells. J Biol Inorg Chem 2008; 14:123-32. [DOI: 10.1007/s00775-008-0430-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Accepted: 08/29/2008] [Indexed: 11/25/2022]
|
15
|
Silva H, Valério Barra C, França da Costa C, de Almeida MV, César ET, Silveira JN, Garnier-Suillerot A, Silva de Paula FC, Pereira-Maia EC, Fontes APS. Impact of the carbon chain length of novel platinum complexes derived from N-alkyl-propanediamines on their cytotoxic activity and cellular uptake. J Inorg Biochem 2008; 102:767-72. [DOI: 10.1016/j.jinorgbio.2007.11.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 10/11/2007] [Accepted: 11/27/2007] [Indexed: 10/22/2022]
|
16
|
Hall MD, Okabe M, Shen DW, Liang XJ, Gottesman MM. The role of cellular accumulation in determining sensitivity to platinum-based chemotherapy. Annu Rev Pharmacol Toxicol 2008; 48:495-535. [PMID: 17937596 DOI: 10.1146/annurev.pharmtox.48.080907.180426] [Citation(s) in RCA: 350] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The platinum (Pt) drugs cisplatin and carboplatin are heavily employed in chemotherapy regimens; however, similar to other classes of drugs, a number of intrinsic and acquired resistance mechanisms hamper their effectiveness. The method by which Pt drugs enter cells has traditionally been attributed to simple passive diffusion. However, recent evidence suggests a number of active uptake and efflux mechanisms are at play, and altered regulation of these transporters is responsible for the reduced accumulation of drug in resistant cells. This review suggests a model that helps reconcile the disparate literature by describing multiple pathways for Pt-containing drugs into and out of the cell.
Collapse
Affiliation(s)
- Matthew D Hall
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-4255, USA
| | | | | | | | | |
Collapse
|
17
|
El-Kareh AW, Labes RE, Secomb TW. Cell cycle checkpoint models for cellular pharmacology of paclitaxel and platinum drugs. AAPS JOURNAL 2008; 10:15-34. [PMID: 18446502 DOI: 10.1208/s12248-007-9003-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2007] [Accepted: 11/21/2007] [Indexed: 11/30/2022]
Abstract
A pharmacokinetic-pharmacodynamic mathematical model is developed for cellular pharmacology of chemotherapeutic drugs for which the decisive step towards cell death occurs at a point in the cell cycle, presumably corresponding to a cell cycle checkpoint. For each cell, the model assumes a threshold level of some intracellular species at that checkpoint, beyond which the cell dies. The threshold level is assumed to have a log-normal distribution in the cell population. The kinetics of formation of the lethal intracellular species depends on the drug, and on the cellular pharmacokinetics and binding kinetics of the cell. Specific models are developed for paclitaxel and for platinum drugs (cisplatin, oxaliplatin and carboplatin). In the case of paclitaxel, two separate mechanisms of cell death necessitate a model that accounts for two checkpoints, with different intracellular species. The model was tested on a number of in vitro cytotoxicity data sets for these drugs, and found overall to give significantly better fits than previously proposed cellular pharmacodynamic models. It provides an explanation for the asymptotic convergence of dose-response curves as exposure time becomes long.
Collapse
Affiliation(s)
- Ardith W El-Kareh
- ARL-Microcirculation Division, University of Arizona, PO Box 245051, Tucson, AZ 85724-5051, USA.
| | | | | |
Collapse
|
18
|
Carvalho Júnior AD, Vieira FP, Melo VJD, Lopes MTP, Silveira JN, Ramaldes GA, Garnier-Suillerot A, Pereira-Maia EC, Oliveira MCD. Preparation and cytotoxicity of cisplatin-containing liposomes. Braz J Med Biol Res 2007; 40:1149-57. [PMID: 17665053 DOI: 10.1590/s0100-879x2006005000125] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Accepted: 03/26/2007] [Indexed: 11/21/2022] Open
Abstract
We encapsulated cisplatin into stealth pH-sensitive liposomes and studied their stability, cytotoxicity and accumulation in a human small-cell lung carcinoma cell line (GLC4) and its resistant subline (GLC4/CDDP). Since reduced cellular drug accumulation has been shown to be the main mechanism responsible for resistance in the GLC4/CDDP subline, we evaluated the ability of this new delivery system to improve cellular uptake. The liposomes were composed of dioleoylphosphatidylethanolamine (DOPE), cholesteryl hemisuccinate (CHEMS), and distearoylphosphatidylethanolamine-polyethyleneglycol 2000 (DSPE-PEG2000) and were characterized by determining the encapsulation percentage as a function of lipid concentration. Among the different formulations, DOPE/CHEMS/DSPE-PEG liposomes (lipid concentration equal to 40 mM) encapsulated cisplatin more efficiently than other concentrations of liposomes (about 20.0%, mean diameter of 174 nm). These liposomes presented good stability in mouse plasma which was obtained using a 0.24-M EDTA solution (70% cisplatin was retained inside the liposomes after 30 min of incubation). Concerning cytotoxic effects, they are more effective (1.34-fold) than free cisplatin for growth inhibition of the human lung cancer cell line A549. The study of cytotoxicity to GLC4 and GLC4/CDDP cell lines showed similar IC50 values (approximately 1.4 microM), i.e., cisplatin-resistant cells were sensitive to this cisplatin formulation. Platinum accumulation in both sensitive and resistant cell lines followed the same pattern, i.e., approximately the same intracellular platinum concentration (4.0 x 10-17 mol/cell) yielded the same cytotoxic effect. These results indicate that long-circulating pH-sensitive liposomes, also termed as stealth pH-sensitive liposomes, may present a promising delivery system for cisplatin-based cancer treatment. This liposome system proved to be able to circumvent the cisplatin resistance, whereas it was not observed when using non-long-circulating liposomes composed of phosphatidylcholine, phosphatidylserine, and cholesterol.
Collapse
Affiliation(s)
- A D Carvalho Júnior
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Di Pasqua AJ, Goodisman J, Kerwood DJ, Toms BB, Dubowy RL, Dabrowiak JC. Role of carbonate in the cytotoxicity of carboplatin. Chem Res Toxicol 2007; 20:896-904. [PMID: 17497898 DOI: 10.1021/tx700058f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Carboplatin, [Pt(NH3)2(CBDCA-O,O')], 1, where CBDCA is cyclobutane-1,1-dicarboxylate, is used against ovarian, lung, and other types of cancer. We recently showed (Di Pasqua et al. (2006) Chem. Res. Toxicol. 19, 139-149) that carboplatin reacts with carbonate under conditions that simulate therapy to produce carbonato carboplatin, cis-[Pt(NH3)2(O-CBDCA)(CO3)]2-, 2. We use 13C and 1H NMR and UV-visible absorption spectroscopy to show that solutions containing carboplatin that have been aged in carbonate buffer under various conditions contain 1, 2, and other compounds. We then show that aging carboplatin in carbonate produces compounds that are more toxic to human neuroblastoma (SK-N-SH), proximal renal tubule (HK-2) and Namalwa-luc Burkitt's lymphoma (BL) cells than carboplatin alone. Moreover, increasing the aging time increases the cytotoxicity of the platinum solutions as measured by the increase in cell death. Although HK-2 cells experience a large loss in survival upon exposure to carbonato forms of the drug, they have the highest values of IC50 of the three cell lines studied, so that HK-2 cells remain the most resistant to the toxic effects of the carbonato forms in the culture medium. This is consistent with the well-known low renal toxicity observed for carboplatin in therapy. The uptake rates for normal Jurkat cells (NJ) and cisplatin-resistant Jurkat cells (RJ), measured by inductively coupled plasma mass spectrometry (ICP-MS), are 16.6 +/- 4.2 and 12.3 +/- 4.8 amol of Pt h-1 cell-1, respectively, when exposed to carboplatin alone. However, when these cells are exposed to carboplatin that has been aged in carbonate media, normal Jurkat cells strongly bind/take up Pt at a rate of 14.5 +/- 4.1 amol of Pt h-1 cell-1, while resistant cells strongly bind/take up 5.1 +/- 3.3 amol of Pt h-1 cell-1. Collectively, these studies show that carboplatin carbonato species may play a major role in the cytotoxicity and uptake of carboplatin by cells.
Collapse
Affiliation(s)
- Anthony J Di Pasqua
- Department of Chemistry, Syracuse University, 111 College Place, CST, Room 1-014, Syracuse, New York 13244-4100, USA
| | | | | | | | | | | |
Collapse
|
20
|
Cheng K, Zhu H, Li Z. Synthesis, Characterization, and Cytotoxic Properties of Platinum(II)‐Amine Complexes. X‐ray Crystal Structure Determination of [Pt(C6H12N4)Cl2] · 3H2O. ACTA ACUST UNITED AC 2007. [DOI: 10.1080/15533170601028181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kui Cheng
- a Institute of Functional Biomolecules, State Key Laboratory of Pharmaceutical Biotechnology , Nanjing University , Nanjing, People's Republic of China
- b Department of Chemistry , Wuhan University of Science and Engineering , Wuhan, People's Republic of China
| | - Hai‐Liang Zhu
- a Institute of Functional Biomolecules, State Key Laboratory of Pharmaceutical Biotechnology , Nanjing University , Nanjing, People's Republic of China
- b Department of Chemistry , Wuhan University of Science and Engineering , Wuhan, People's Republic of China
| | - Zhi‐Bin Li
- a Institute of Functional Biomolecules, State Key Laboratory of Pharmaceutical Biotechnology , Nanjing University , Nanjing, People's Republic of China
- b Department of Chemistry , Wuhan University of Science and Engineering , Wuhan, People's Republic of China
| |
Collapse
|
21
|
Hägerlöf M, Papsai P, Chow CS, Elmroth SKC. More pronounced salt dependence and higher reactivity for platination of the hairpin r(CGCGUUGUUCGCG) compared with d(CGCGTTGTTCGCG). J Biol Inorg Chem 2006; 11:974-90. [PMID: 16953416 DOI: 10.1007/s00775-006-0157-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Accepted: 08/02/2006] [Indexed: 10/24/2022]
Abstract
The DNA interference pathways exhibited by cisplatin and related anticancer active metal complexes have been extensively studied. Much less is known to what extent RNA interaction pathways may operate in parallel, and perhaps contribute to both antineoplastic activity and toxicity. The present study was designed with the aim of comparing the reactivity of two model systems comprising RNA and DNA hairpins, r(CGCGUUGUUCGCG) and d(CGCGTTGTTCGCG), towards a series of platinum(II) complexes. Three platinum complexes were used as metallation reagents; cis-[PtCl(NH3)2(OH2)]+ (1), cis-[PtCl(NH3)(c-C6H11NH2)(OH2)]+ (2), and trans-[PtCl(NH3)(quinoline)(OH2)]+ (3). The reaction kinetics were studied at pH 6.0, 25 degrees C, and 1.0 mM < or = I < or = 500 mM. For both types of nucleic acid targets, compound 3 was found to react about 1 order of magnitude more rapidly than compounds 1 and 2. Further, all platinum compounds exhibited a more pronounced salt dependence for the interaction with r(CGCGUUGUUCGCG). Chemical and enzymatic cleavage studies revealed similar interaction patterns with r(CGCGUUGUUCGCG) after long exposure times to 1 and 2. A substantial decrease of cleavage intensity was found at residues G4 and G7, indicative of bifunctional adduct formation. Circular dichroism studies showed that platinum adduct formation leads to a structural change of the ribonucleic acid. Thermal denaturation studies revealed platination to cause a decrease of the RNA melting temperatures by 5-10 degrees C. Our observations therefore suggest that RNA is a kinetically competitive target to DNA. Furthermore, platination causes destabilization of RNA structural elements, which may lead to deleterious intracellular effects on biologically relevant RNA targets.
Collapse
|
22
|
Dzamitika S, Salerno M, Pereira-Maia E, Le Moyec L, Garnier-Suillerot A. Preferential energy- and potential-dependent accumulation of cisplatin-gutathione complexes in human cancer cell lines (GLC4 and K562): A likely role of mitochondria. J Bioenerg Biomembr 2006; 38:11-21. [PMID: 16732471 DOI: 10.1007/s10863-006-9001-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2005] [Accepted: 01/19/2006] [Indexed: 11/28/2022]
Abstract
cis-Diamminedichloroplatinum(II) (CDDP) is an important chemotherapeutic agent used in the treatment of a wide variety of solid tumors. We have recently shown that aquated forms of cisplatin (aqua-Pt) rapidly accumulate in K562 and GLC4 cultured cells, in comparison to CDDP. Thus, when cells are incubated with aquated forms of cisplatin a gradient of concentration is observed after a short time, approximately 40 min, with an intracellular concentration of aqua-Pt of 20-30 times higher than that of extracellular aqua-Pt. The same gradient of concentration is observed when cells are incubated with CDDP but it takes a longer time, i.e., about 24 h. Therefore, the question arises as to the identity of the intracellular sites of accumulation of aqua-Pt. Using several agents to modulate membrane potential, acidic compartment pH and/or ATP level, we obtained evidence that aqua-Pt may accumulate rapidly inside mitochondria as this accumulation is energy- and membrane-potential-dependent. However, aqua-Pt complexes are not characterized by a delocalized charge and a lipophilic character that would permit their movement through the inner membrane. Therefore, it is suggested that intracellular aqua-Pt reacts rapidly with glutathione with the resultant complex being transported inside the mitochondria via one of the known glutathione transporters, i.e., dicarboxylate and/or 2-oxoglutarate transporters present in the inner membrane.
Collapse
Affiliation(s)
- Simplice Dzamitika
- Biophysique Moléculaire Cellulaire et Tissulaire (BioMoCeTi UMR-CNRS 7033), Université Paris 13 et Université Paris 6, UFR SMBH, 74 rue Marcel Cachin, 93017, Bobigny, France
| | | | | | | | | |
Collapse
|
23
|
Couri MRC, de Almeida MV, Fontes APS, D’Arc Souza Chaves J, Cesar ET, Alves RJ, Pereira-Maia EC, Garnier-Suillerot A. Synthesis of Polyamines from Ethylenediamine and Their Platinum(II) Complexes, Potential Antitumor Agents. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200501024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Centerwall CR, Tacka KA, Kerwood DJ, Goodisman J, Toms BB, Dubowy RL, Dabrowiak JC. Modification and uptake of a cisplatin carbonato complex by Jurkat cells. Mol Pharmacol 2006; 70:348-55. [PMID: 16632646 DOI: 10.1124/mol.106.023184] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The interactions of Jurkat cells with cisplatin, cis-[Pt(15NH3)2Cl2]1, are studied using 1H-15N heteronuclear single quantum coherence (HSQC) NMR and inductively coupled plasma mass spectrometry. We show that Jurkat cells in culture rapidly modify the monocarbonato complex cis-[Pt(15NH3)2(CO3)Cl]- (4), a cisplatin species that forms in culture media and probably also in blood. Analysis of the HSQC NMR peak intensity for 4 in the presence of different numbers of Jurkat cells reveals that each cell is capable of modifying 0.0028 pmol of 4 within approximately 0.6 h. The amounts of platinum taken up by the cell, weakly bound to the cell surface, remaining in the culture medium, and bound to genomic DNA were measured as functions of time of exposure to different concentrations of drug. The results show that most of the 4 that has been modified by the cells remains in the culture medium as a substance of molecular mass <3 kDa, which is HSQC NMR silent, and is not taken up by the cell. These results are consistent with a hitherto undocumented extracellular detoxification mechanism in which the cells rapidly modify 4, which is present in the culture medium, so it cannot bind to the cell. Because there is only a slow decrease in the amount of unmodified 4 remaining in the culture medium after 1 h, -1.1 +/- 0.4 microM h(-1), the cells subsequently lose their ability to modify 4. These observations have important implications for the mechanism of action of cisplatin.
Collapse
Affiliation(s)
- Corey R Centerwall
- Department of Chemistry, 111 College Place, Rm. 1-014 CST, Syracuse University, Syracuse, NY 13244-4100, USA
| | | | | | | | | | | | | |
Collapse
|
25
|
Tacka KA, Szalda D, Souid AK, Goodisman J, Dabrowiak JC. Experimental and Theoretical Studies on the Pharmacodynamics of Cisplatin in Jurkat Cells. Chem Res Toxicol 2004; 17:1434-44. [PMID: 15540941 DOI: 10.1021/tx0498760] [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] [Indexed: 11/30/2022]
Abstract
For Jurkat cells in culture exposed to cisplatin (1), we measured the number of platinum adducts on DNA and showed that it is proportional to the AUC, the area under the concentration vs time curve, for cisplatin. The number of platinum-DNA adducts is measured immediately following exposure to drug. The AUC is calculated either as the product of the initial cisplatin concentration and the exposure time or as the integral under the concentration vs time curve for the unreacted dichloro species, which decreases exponentially. We also show that the number of adducts correlates with decreases in respiration, with the amount of DNA fragmentation, and with cell viability, all measured 24 h after exposure to the drug. To study the reactions of cisplatin at concentrations approaching clinical relevance (65 microM), we use two-dimensional [1H15N]HSQC NMR and the 15N-labeled form of the drug, cis-Pt(15NH3)2Cl2, 1. In the absence of cells, 1 reacts with components of the growth medium and also transforms slowly (k(h) = 0.205 h-1 at 37 degrees C) into the chloro-aquo species, cis-[Pt(15NH3)2Cl(H2O)]+ (2), which at the pH of the medium (pH 7.15), is mainly in the deprotonated chloro-hydroxy form, cis-Pt(15NH3)2Cl(OH) (4). The concentration of 2 (4), as measured by HSQC NMR, decreases due to reaction with components of the medium. In the presence of 5 million or more cells, the concentration of 1 decreases with time, but the NMR signal for 2 (4) is not seen because it is rapidly removed from solution by the cells, keeping its concentration very low. These experiments confirm that the species preferentially removed from the medium by cells is 2 (4) and not 1. Our findings are discussed in the context of a kinetic model for platination of nuclear DNA by cisplatin, which includes aquation of cisplatin outside the cell, passage of 2 (4) through the cell membrane, reaction of reactive platinum species (RPS) in the cytosol with thiols, formation of adducts between RPS and accessible sites on genomic DNA, and removal of platinum from DNA by repair. Some of the rate constants involved are measured, but others can only be estimated. Calculations with this model show that little of the platinum reacts with intracellular thiols before reaching the nuclear DNA, indicating that binding to thiols is not important in cisplatin resistance. The model also predicts the circumstances under which the amount of platination of nuclear DNA is proportional to AUC.
Collapse
Affiliation(s)
- Kirk A Tacka
- Department of Chemistry, Syracuse University, 111 College Place, CST Rm1-014, Syracuse, New York 13244-4100, USA
| | | | | | | | | |
Collapse
|
26
|
|