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Ashrafzadeh MS, Akbarzadeh A, Heydarinasab A, Ardjmand M. In vivo Glioblastoma Therapy Using Targeted Liposomal Cisplatin. Int J Nanomedicine 2020; 15:7035-7049. [PMID: 33061366 PMCID: PMC7522301 DOI: 10.2147/ijn.s255902] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/27/2020] [Indexed: 12/21/2022] Open
Abstract
Background Drug delivery systems have demonstrated promising results to cross blood–brain barrier (BBB) and deliver the loaded therapeutics to the brain tumor. This study aims to utilize the transferrin receptor (TR)-targeted liposomal cisplatin (Cispt) for transporting Cispt across the BBB and deliver Cispt to the brain tumor. Methods Targeted pegylated liposomal cisplatin (TPL-Cispt) was synthesized using reverse phase evaporation method and thiolated OX26 monoclonal antibody. The formulation was characterized in terms of size, size distribution, zeta potential, drug encapsulation and loading efficiencies, bioactivity, drug release profile, stability and cellular uptake using dynamic light scattering, flame atomic absorption spectroscopy (AAS), ELISA, dialysis membrane, and fluorescence assay. Next, the potency of the formulation to increase the therapeutic effects of Cispt and decrease its toxicity effects was evaluated in the brain tumor-bearing rats through measuring the mean survival time (MST), blood factors and histopathological studies. Results The results showed that TPL-Cispt with a size of 157±8 nm and drug encapsulation efficiency of 24%±1.22 was synthesized, that was biologically active and released Cispt in a slow-controlled manner. The formulation compared to Cispt-loaded PEGylated liposome nanoparticles (PL-Cispt) caused an increase in the cellular uptake by 1.43-fold, as well as an increase in the MST of the brain tumor-bearing rats by 1.7-fold compared to the PL-Cispt (P<0.001). TPL-Cispt was potent enough to cause a significant decrease in Cispt toxicity effects (P<0.001). Conclusion Overall, the results suggest that targeting the Cispt-loaded PEGylated liposome is a promising approach to develop formulation with enhanced efficacy and reduced toxicity for the treatment of brain tumor.
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Affiliation(s)
- Maryam Sadat Ashrafzadeh
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Azim Akbarzadeh
- Department of Pilot Nanobiotechnology, Pasteur Institute of Iran, Tehran, Iran
| | - Amir Heydarinasab
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mehdi Ardjmand
- Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
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Preparation, Characterization, and Evaluation of Cisplatin-Loaded Polybutylcyanoacrylate Nanoparticles with Improved In Vitro and In Vivo Anticancer Activities. Pharmaceuticals (Basel) 2020; 13:ph13030044. [PMID: 32168743 PMCID: PMC7151690 DOI: 10.3390/ph13030044] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 03/05/2020] [Accepted: 03/07/2020] [Indexed: 12/12/2022] Open
Abstract
This study aimed to evaluate the therapeutic efficacy of the cisplatin encapsulated into polybutylcyanoacrylate (PBCA) nanoparticles for the treatment of kidney cancer. The nanoformulation was successfully developed using the miniemulsion polymerization method and characterized in terms of size, size distribution, drug loading and encapsulation efficiencies, drug release behavior, in vitro cytotoxicity effects, in vivo toxicity, and therapeutic effects. Cisplatin-loaded PBCA nanoparticles were confirmed to be in nanoscale with the drug entrapment efficiency of 23% and controlled drug release profile, in which only 9% of the loaded drug was released after 48 h. The nanoparticles caused an increase in the cytotoxicity effects of cisplatin against renal cell adenocarcinoma cells (ACHN) (2.3-fold) and considerably decreased blood urea nitrogen and creatinine concentrations when compared to the standard cisplatin (1.6-fold and 1.5-fold, respectively). The nanoformulation also caused an increase in the therapeutic effects of cisplatin by 1.8-fold, in which a reduction in the mean tumor size was seen (3.5 mm vs. 6.5 mm) when compared to the standard cisplatin receiver rats. Overall, cisplatin-loaded PBCA nanoparticles can be considered as a promising drug candidate for the treatment of kidney cancer due to its potency to reduce the side effects of cisplatin and its toxicity and therapeutic effects on cancer-bearing Wistar rats.
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Rao H, Ma Y, Xue Z, Du X, Zhao G, Li S. Amperometric Determination of Maltol using a Cobalt Oxide-Assembled MCM-41 Composite-Modified Glassy Carbon Electrode. ANAL LETT 2016. [DOI: 10.1080/00032719.2016.1225749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Honghong Rao
- College of Chemistry & Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China
| | - Yaya Ma
- College of Chemistry & Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China
| | - Zhonghua Xue
- College of Chemistry & Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China
| | - Xinzhen Du
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, P. R. China
| | - Guohu Zhao
- College of Chemistry & Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China
| | - Shenyin Li
- College of Chemistry & Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China
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Cui H, Goddard R, Pörschke KR, Hamacher A, Kassack MU. Bispidine Analogues of Cisplatin, Carboplatin, and Oxaliplatin. Synthesis, Structures, and Cytotoxicity. Inorg Chem 2014; 53:3371-84. [DOI: 10.1021/ic402737f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Huiling Cui
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Klaus-Richard Pörschke
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Alexandra Hamacher
- Institut für Pharmazeutische und Medizinische
Chemie der Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse
1, 40225 Düsseldorf, Germany
| | - Matthias U. Kassack
- Institut für Pharmazeutische und Medizinische
Chemie der Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse
1, 40225 Düsseldorf, Germany
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Lopes P, Paixão D, de Paula F, Ferreira A, Ellena J, Guilardi S, Pereira-Maia E, Guerra W. A new copper(II) complex with 2-thenoyltrifluoroacetone and 2,2-bipyridine: Crystal structure, spectral properties and cytotoxic activity. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Alblawi K, Henderson W, Nicholson BK. Synthesis and characterization of nickel(II) maltolate complexes containing ancillary bisphosphine ligands. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.553224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Kamal Alblawi
- a Department of Chemistry , University of Waikato , Private Bag 3105, Hamilton, New Zealand
| | - William Henderson
- a Department of Chemistry , University of Waikato , Private Bag 3105, Hamilton, New Zealand
| | - Brian K. Nicholson
- a Department of Chemistry , University of Waikato , Private Bag 3105, Hamilton, New Zealand
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Substituted 9-aminoacridine-4-carboxamides tethered to platinum(II)diamine complexes: Chemistry, cytotoxicity and DNA sequence selectivity. J Inorg Biochem 2010; 104:815-9. [PMID: 20494445 DOI: 10.1016/j.jinorgbio.2010.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Revised: 02/16/2010] [Accepted: 03/19/2010] [Indexed: 11/24/2022]
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Dvořák L, Popa I, Štarha P, Trávníček Z. In Vitro Cytotoxic-Active Platinum(II) Complexes Derived from Carboplatin and Involving Purine Derivatives. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000322] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Barve A, Kumbhar A, Bhat M, Joshi B, Butcher R, Sonawane U, Joshi R. Mixed-ligand copper(II) maltolate complexes: synthesis, characterization, DNA binding and cleavage, and cytotoxicity. Inorg Chem 2010; 48:9120-32. [PMID: 19780613 DOI: 10.1021/ic9004642] [Citation(s) in RCA: 146] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mixed-ligand complexes [Cu(L)(maltol)] where L = 2,2'-bipyridine (bpy; 1), 1,10-phenanthroline (phen; 2), 1,10-phenanthroline-5,6-dione (phendione; 3), dipyrido[3,2-a:2',3'-c]phenazine (dppz; 4), and 4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f][1,10]-phenanthroline-6,13-dione (bipyridylglycoluril; bpg; 5) have been synthesized and characterized by structural, analytical, and spectral methods. The single-crystal X-ray structures of 1, 2, and 5 exhibit a distorted square-pyramidal structure, with the polypyridyl ligands and maltol occupying equatorial positions and either a water or nitrate anion at the axial position. The N,N-dimethylformamide glass as well as the single-crystal electron paramagnetic resonance of the complexes confirms the distorted square-pyramidal structure. The DNA binding investigated using different techniques (absorption titration, viscosity, thermal melting, and fluorescence quenching) indicates the partial intercalation of the planar polypyridyl ligands into DNA. The complexes cleave plasmid pBR322 DNA by a hydrolytic mechanism. The kinetic aspects of DNA cleavage under pseudo-Michaelis-Menten and true Michaelis-Menten conditions as well as the phosphodiesterase activity using model 4-nitrophenylphosphate are also detailed. The cytotoxicity of the complexes against HeLa (cervical) cancer cell lines shows that synergy between the metal and ligands results in a significant enhancement in the cell death with IC(50) of approximately 150-270 microg mL(-1).
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Affiliation(s)
- Archika Barve
- Department of Chemistry, University of Pune, Pune 411007, India
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Benedetti M, Antonucci D, Migoni D, Vecchio VM, Ducani C, Fanizzi FP. Water-soluble Organometallic Analogues of Oxaliplatin with Cytotoxic and Anticlonogenic Activity. ChemMedChem 2010; 5:46-51. [PMID: 19950163 DOI: 10.1002/cmdc.200900412] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Michele Benedetti
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Provinciale Lecce-Monteroni, 73100 Lecce, Italy
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Souza ET, Castro LC, Castro FAV, do Canto Visentin L, Pinheiro CB, Pereira MD, de Paula Machado S, Scarpellini M. Synthesis, characterization and biological activities of mononuclear Co(III) complexes as potential bioreductively activated prodrugs. J Inorg Biochem 2009; 103:1355-65. [PMID: 19665800 DOI: 10.1016/j.jinorgbio.2009.07.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 07/08/2009] [Accepted: 07/10/2009] [Indexed: 11/17/2022]
Abstract
Aiming to investigate the use of tridentate ligands to develop new bireductively activated prodrugs, two N(2)O-donor ligands (HL1: [(2-hydroxybenzyl)(2-(imidazol-2-yl)ethyl)]amine; and HL2: [(2-hydroxybenzyl)(2-(pyridil-2-yl)ethyl]amine) were used to synthesize new Co(III) complexes, 1 and 2. Both complexes were characterized by X-ray crystallography, mass spectrometry, electrochemistry, IR, UV-visible and (1)H NMR spectroscopies. Electrochemical data in methanol revealed that the Co(III)-->Co(II) reduction of 1 (-0.84V vs. normal hydrogen electrode - NHE) is more positive than 2 (-1.13V vs. NHE), while it was expected to be more negative due to better sigma-donor ability of imidazole ring in HL1, compared to pyridine in HL2. Considering that reduction processes on Co(III) center may involve the lowest unoccupied molecular orbital (LUMO), it might play an important role on the electronic properties of the complexes, and could explain the observed redox potentials. Then, geometry optimizations of 1 and 2 were performed using the density functional theory (DFT), and different group participation in their LUMO is demonstrated. Using Saccharomyces cerevisiae cells as eukaryotic model, it is shown that in situ generated reduced species, 1(red) and 2(red), have high capacity to inhibit cellular growth, with IC50 (0.50mM for both complexes) lower than cisplatin IC50 (0.6mM) at the same time of exposure. Regarding to their ability to promote S. cerevisiae cells death, after 24 h, cells became susceptible only when exposed to 1(red) and 2(red): (i) at concentrations higher than 0.5mM in a non-dose dependence, and (ii) in anaerobic metabolism. These data reveal the potential of 1 and 2 as bioreductively activated prodrugs, since their oxidized forms do not present expressive activities when compared to their reduced forms.
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Affiliation(s)
- Elizabeth Teixeira Souza
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil
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Ranaldo R, Margiotta N, Intini FP, Pacifico C, Natile G. Conformer distribution in (cis-1,4-DACH)bis(guanosine-5'-phosphate)platinum(II) adducts: a reliable model for DNA adducts of antitumoral cisplatin. Inorg Chem 2008; 47:2820-30. [PMID: 18284193 DOI: 10.1021/ic702202x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In [PtCl2(cis-1,4-DACH)] (DACH = diaminocyclohexane), the N-Pt-N bite angle (> or =97 degrees , as determined by X-ray diffraction analysis) is much larger than those found in other Pt complexes with bidentate diamines or in cisplatin (approximately 91 degrees ). Hence, the possibility exists that in (cis-1,4-DACH)PtG 2 adducts, rotation of the G's around the Pt-N7 bonds is slowed enough to allow observation of different conformers. In accord with this prevision, decreasing the temperature to 238 K enabled us to observe different conformers of (cis-1,4-DACH)Pt(5'-GMP) 2 (GMP = guanosine monophosphate). This observation is the first case in which such conformers for a platinum derivative with primary diamines and untethered guanines have been resolved and represents the closest model to clinically effective cisplatin obtained to date. We also found that the presence of the 1,4-DACH ligand increased the intensity of the circular dichroism signal stemming from the dominance of an HT conformer (DeltaHT in the adduct with 3'-GMPs and LambdaHT in the adduct with 5'-GMPs).
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Affiliation(s)
- Rosa Ranaldo
- Dipartimento Farmaco-Chimico, Università degli Studi di Bari, Via E. Orabona 4, 70125 Bari, Italy
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Fischer-Fodor E, Moldovan N, Virag P, Soritau O, Brie I, Lönnecke P, Hey-Hawkins E, Silaghi-Dumitrescu L. The CellScan technology for in vitro studies on novel platinum complexes with organoarsenic ligands. Dalton Trans 2008:6393-400. [DOI: 10.1039/b802364f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ozturk II, Hadjikakou SK, Hadjiliadis N, Kourkoumelis N, Kubicki M, Baril M, Butler IS, Balzarini J. Synthesis, Structural Characterization, and Biological Studies of New Antimony(III) Complexes with Thiones. The Influence of the Solvent on the Geometry of the Complexes. Inorg Chem 2007; 46:8652-61. [PMID: 17850141 DOI: 10.1021/ic700756e] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five new antimony(III) complexes with the heterocyclic thiones 2-mercapto-benzimidazole (MBZIM), 5-ethoxy-2-mercapto-benzimidazole (EtMBZIM), and 2-mercapto-thiazolidine (MTZD) of formulas {[SbCl(2)(MBZIM)4]+.Cl-.2H(2)O. (CH(3)OH)} (1), {[SbCl(2)(MBZIM)4]+.Cl-.3H(2)O.(CH3CN)} (2), [SbCl(3)(MBZIM)2] (3), [SbCl(3)(EtMBZIM)(2)] (4), and [SbCl(3)(MTZD)2] (5) have been synthesized and characterized by elemental analysis, FT-IR, far-FT-IR, differential thermal analysis-thermogravimetry, X-ray diffraction, and conductivity measurements. Complex {[SbCl2(tHPMT)(2)]+Cl-}, (tHPMT = 2-mercapto-3,4,5,6-tetrahydro-pyrimidine), already known, was also prepared, and its X-ray crystal structure was solved. It is shown that the complex is better described as {[SbCl3(tHPMT)(2)]} (6). Crystal structures of all other complexes (1-5) have also been determined by X-ray diffraction at ambient conditions. The crystal structure of the hydrated ligand, EtMBZIM.H2O is also reported. Compound [C(28)H(24)Cl(2)N(8)S(4)Sb.2H(2)O.Cl.(CH(3)OH)] (1) crystallizes in space group P2(1), with a = 7.7398(8) A, b = 16.724(3) A, c = 13.717(2) A, beta = 98.632(11) degrees, and Z = 2. Complex [C(28)H(24)Cl(2)N(8)S(4)S(b).Cl.3H(2)O.(CH(3)CN)] (2) corresponds to space group P2(1), with a = 7.8216(8) A, b = 16.7426(17) A, c = 13.9375(16) A, beta = 99.218(10) degrees , and Z = 2. In both 1 and 2 complexes, four sulfur atoms from thione ligands and two chloride ions form an octahedral (Oh) cationic [SbS(4)Cl(2)]+ complex ion, where chlorides lie at axial positions. A third chloride counteranion neutralizes it. Complexes 1 and 2 are the first examples of antimony(III) compounds with positively charged Oh geometries. Compound [C(14)H(12)Cl(3)N(4)S(2)S(b)] (3) crystallizes in space group P, with a = 7.3034(5) A, b = 11.2277(7) A, c = 12.0172(8) A, alpha = 76.772(5) degrees, beta = 77.101(6) degrees, gamma = 87.450(5) degrees, and Z = 2. Complex [C(18)H(20)Cl(3)N(4)O(2)S(2)S(b)] (4) crystallizes in space group P1, with a = 8.6682(6) A, b = 10.6005(7) A, c = 13.0177(9) A, alpha = 84.181(6) degrees, beta = 79.358(6) degrees, gamma = 84.882(6) degrees, and Z = 2, while complex [C(6)H(10)Cl(3)N(2)S(4)S(b)] (5) in space group P2(1)/c shows a = 8.3659(10) A, b = 14.8323(19) A, c = 12.0218(13) A, beta = 99.660(12) degrees, and Z = 4 and complex [C(8)H(16)Cl(3)N(4)S(2)S(b)] (6) in space group P1 shows a = 7.4975(6) A, b = 10.3220(7) A, c = 12.1094(11) A, alpha = 71.411(7) degrees, beta = 84.244(7) degrees, gamma = 73.588(6) degrees, and Z = 2. Crystals of complexes 3-6 grown from acetonitrile solutions adopt a square-pyramidal (SP) geometry, with two sulfur atoms from thione ligands and three chloride anions around Sb(III). The equatorial plane is formed by two sulfur and two chloride atoms in complexes 3-5, in a cis-S, cis-Cl arrangement in 3 and 5 and a trans-S, trans-Cl arrangement in 4. Finally, in the case of 6, the equatorial plane is formed by three chloride ions and one sulfur from the thione ligand while the second sulfur atom takes an axial position leading to a unique SP conformation. The complexes showed a moderate cytostatic activity against tumor cell lines.
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Affiliation(s)
- Ibrahim I Ozturk
- Section of Inorganic and Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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Splettstoesser F, Florea AM, Büsselberg D. IP(3) receptor antagonist, 2-APB, attenuates cisplatin induced Ca2+-influx in HeLa-S3 cells and prevents activation of calpain and induction of apoptosis. Br J Pharmacol 2007; 151:1176-86. [PMID: 17592515 PMCID: PMC2189830 DOI: 10.1038/sj.bjp.0707335] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Cisplatin drives specific types of tumour cells to apoptosis. In this study we investigate the involvement of intracellular calcium ([Ca(2+)](i)) in triggering apoptosis in two different cell lines. As cisplatin is used for the treatment of several forms of cancer we choose HeLa-S3 and U2-OS as two examples of tumour cell lines. EXPERIMENTAL APPROACH Cisplatin (1 nM-10 microM) was applied to HeLa-S3 and U2-OS cells and [Ca(2+)](i) measured with fluo-4, using laser scanning microscopy. Inositol-1,4,5-trisphosphate (IP(3)) receptors were visualized with immunostaining. Membrane conductances were measured with patch-clamp techniques. Levels of calpain and caspases were assessed by western blots and apoptotic cells were stained with Hoechst 33342 and counted. KEY RESULTS Cisplatin increases [Ca(2+)](i) concentration-dependently in HeLa-S3 but not in U2-OS cells. This elevation of [Ca(2+)](i) depended on extracellular Ca(2+) but was reduced by the IP(3) receptor blocker, 2-APB. This effect was not due to a Ca(2+) release triggered by Ca(2+) entry. Immunostaining showed IP(3)-receptors (type 1-3) at the cellular membrane of HeLa-S3 cells, but not in U2-OS cells. Electrophysiological experiments showed an increased membrane conductance with cisplatin only when Ca(2+) was present extracellularly. Increase of [Ca(2+)](i) was related to the activation of calpain but not caspase-8 and triggered apoptosis in HeLa-S3 but not in U2-OS cells. CONCLUSIONS AND IMPLICATIONS Our observations on the activation of IP(3)-receptors, calcium entry and apoptotic rate by cisplatin in specific carcinogenic cells might open new possibilities in the treatment of some forms of cancer.
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Affiliation(s)
- F Splettstoesser
- Institut für Physiologie, Universitätsklinikum, Universität Duisburg-Essen Essen, Germany
| | - A-M Florea
- Institut für Physiologie, Universitätsklinikum, Universität Duisburg-Essen Essen, Germany
| | - D Büsselberg
- Institut für Physiologie, Universitätsklinikum, Universität Duisburg-Essen Essen, Germany
- Author for correspondence:
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Carland M, Abrahams BF, Rede T, Stephenson J, Murray V, Denny WA, McFadyen WD. Syntheses and structural studies of platinum(II) complexes of O-methylselenomethionine and related ligands. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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