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Sánchez-Lombardo I, Alvarez S, McLauchlan CC, Crans DC. Evaluating transition state structures of vanadium-phosphatase protein complexes using shape analysis. J Inorg Biochem 2015; 147:153-64. [PMID: 25953100 DOI: 10.1016/j.jinorgbio.2015.04.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 12/19/2022]
Abstract
Shape analysis of coordination complexes is well-suited to evaluate the subtle distortions in the trigonal bipyramidal (TBPY-5) geometry of vanadium coordinated in the active site of phosphatases and characterized by X-ray crystallography. Recent studies using the tau (τ) analysis support the assertion that vanadium is best described as a trigonal bipyramid, because this geometry is the ideal transition state geometry of the phosphate ester substrate hydrolysis (C.C. McLauchlan, B.J. Peters, G.R. Willsky, D.C. Crans, Coord. Chem. Rev. http://dx.doi.org/10.1016/j.ccr.2014.12.012 ; D.C. Crans, M.L. Tarlton, C.C. McLauchlan, Eur. J. Inorg. Chem. 2014, 4450-4468). Here we use continuous shape measures (CShM) analysis to investigate the structural space of the five-coordinate vanadium-phosphatase complexes associated with mechanistic transformations between the tetrahedral geometry and the five-coordinate high energy TBPY-5 geometry was discussed focusing on the protein tyrosine phosphatase 1B (PTP1B) enzyme. No evidence for square pyramidal geometries was observed in any vanadium-protein complexes. The shape analysis positioned the metal ion and the ligands in the active site reflecting the mechanism of the cleavage of the organic phosphate in a phosphatase. We identified the umbrella distortions to be directly on the reaction path between tetrahedral phosphate and the TBPY-5-types of high-energy species. The umbrella distortions of the trigonal bipyramid are therefore identified as being the most relevant types of transition state structures for the phosphoryl group transfer reactions for phosphatases and this may be related to the possibility that vanadium is an inhibitor for enzymes that support both exploded and five-coordinate transition states.
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Affiliation(s)
| | - Santiago Alvarez
- Departament de Química Inorganica, Institut de Química Teorica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franques, 1-11, 08028 Barcelona, Spain.
| | - Craig C McLauchlan
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, IL 61790, USA
| | - Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
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Habala L, Bartel C, Giester G, Jakupec MA, Keppler BK, Rompel A. Complexes of N-hydroxyethyl-N-benzimidazolylmethylethylenediaminediacetic acid with group 12 metals and vanadium-Synthesis, structure and bioactivity of the vanadium complex. J Inorg Biochem 2015; 147:147-52. [PMID: 25920686 DOI: 10.1016/j.jinorgbio.2015.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 04/03/2015] [Accepted: 04/03/2015] [Indexed: 11/18/2022]
Abstract
Four new complexes of group 12 metals [Zn(II), Cd(II) and Hg(II)], along with vanadyl bound to the ligand N-hydroxyethyl-N-benzimidazolylmethylethylenediaminediacetic acid, have been synthesized and characterized. The structure of the complexes with Zn(II), Hg(II) and V(IV) was determined by X-ray structural analysis. In all observed cases, the symmetry of these complexes was found to be distorted octahedral. The inhibition of protein tyrosine phosphatase 1B by the vanadium(IV) complex was demonstrated. The cytotoxicity of the vanadium(IV) complex was tested in vitro against three cancer cell lines, with a comparison of the activity of the free ligand and of vanadyl acetylacetonate and sodium orthovanadate. The IC50 values of the complex were in the range of 9 to 21μM. Remarkably, cytotoxic potency in the multidrug-resistant non-small cell lung cancer cell line A549 was at least as high as in the broadly chemosensitive ovarian teratocarcinoma cell line CH1(PA-1).
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Affiliation(s)
- Ladislav Habala
- Institut für Biophysikalische Chemie, Fakultät für Chemie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria; Department of Chemical Theory of Drugs, Faculty of Pharmacy, Comenius University, Kalinciakova 8, SK-832 32 Bratislava, Slovakia
| | - Caroline Bartel
- Institut für Anorganische Chemie, Fakultät für Chemie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria
| | - Gerald Giester
- Institut für Mineralogie und Kristallographie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria
| | - Michael A Jakupec
- Institut für Anorganische Chemie, Fakultät für Chemie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria
| | - Bernhard K Keppler
- Institut für Anorganische Chemie, Fakultät für Chemie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria
| | - Annette Rompel
- Institut für Biophysikalische Chemie, Fakultät für Chemie, Universität Wien, Althanstr. 14, A-1090 Wien, Austria.
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Apostolopoulou A, Vlasiou M, Tziouris PA, Tsiafoulis C, Tsipis AC, Rehder D, Kabanos TA, Keramidas AD, Stathatos E. Oxidovanadium(IV/V) complexes as new redox mediators in dye-sensitized solar cells: a combined experimental and theoretical study. Inorg Chem 2015; 54:3979-88. [PMID: 25844512 DOI: 10.1021/acs.inorgchem.5b00159] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Corrosiveness is one of the main drawbacks of using the iodide/triiodide redox couple in dye-sensitized solar cells (DSSCs). Alternative redox couples including transition metal complexes have been investigated where surprisingly high efficiencies for the conversion of solar to electrical energy have been achieved. In this paper, we examined the development of a DSSC using an electrolyte based on square pyramidal oxidovanadium(IV/V) complexes. The oxidovanadium(IV) complex (Ph4P)2[V(IV)O(hybeb)] was combined with its oxidized analogue (Ph4P)[V(V)O(hybeb)] {where hybeb(4-) is the tetradentate diamidodiphenolate ligand [1-(2-hydroxybenzamido)-2-(2-pyridinecarboxamido)benzenato}and applied as a redox couple in the electrolyte of DSSCs. The complexes exhibit large electron exchange and transfer rates, which are evident from electron paramagnetic resonance spectroscopy and electrochemistry, rendering the oxidovanadium(IV/V) compounds suitable for redox mediators in DSSCs. The very large self-exchange rate constant offered an insight into the mechanism of the exchange reaction most likely mediated through an outer-sphere exchange mechanism. The [V(IV)O(hybeb)](2-)/[V(V)O(hybeb)](-) redox potential and the energy of highest occupied molecular orbital (HOMO) of the sensitizing dye N719 and the HOMO of [V(IV)O(hybeb)](2-) were calculated by means of density functional theory electronic structure calculation methods. The complexes were applied as a new redox mediator in DSSCs, while the cell performance was studied in terms of the concentration of the reduced and oxidized form of the complexes. These studies were performed with the commercial Ru-based sensitizer N719 absorbed on a TiO2 semiconducting film in the DSSC. Maximum energy conversion efficiencies of 2% at simulated solar light (AM 1.5; 1000 W m(-2)) with an open circuit voltage of 660 mV, a short-circuit current of 5.2 mA cm(-2), and a fill factor of 0.58 were recorded without the presence of any additives in the electrolyte.
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Affiliation(s)
- Andigoni Apostolopoulou
- †Nanotechnology and Advanced Materials Laboratory, Electrical Engineering Department, Technological-Educational Institute of Western Greece, GR-26334 Patras, Greece.,∥Department of Physics, University of Patras, GR-26500 Patras, Greece
| | - Manolis Vlasiou
- ‡Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
| | | | | | | | - Dieter Rehder
- ⊥Department of Chemistry, University of Hamburg, D-20146 Hamburg, Germany
| | | | | | - Elias Stathatos
- †Nanotechnology and Advanced Materials Laboratory, Electrical Engineering Department, Technological-Educational Institute of Western Greece, GR-26334 Patras, Greece
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Pourpoint F, Yehl J, Li M, Gupta R, Trébosc J, Lafon O, Amoureux JP, Polenova T. NMR Crystallography of an Oxovanadium(V) Complex by an Approach Combining Multinuclear Magic Angle Spinning NMR, DFT, and Spin Dynamics Simulations. Chemphyschem 2015; 16:1619-26. [DOI: 10.1002/cphc.201500033] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Indexed: 11/08/2022]
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Thirty years through vanadium chemistry. J Inorg Biochem 2015; 147:4-24. [PMID: 25843361 DOI: 10.1016/j.jinorgbio.2015.03.004] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/12/2015] [Accepted: 03/13/2015] [Indexed: 11/23/2022]
Abstract
The relevance of vanadium in biological systems is known for many years and vanadium-based catalysts have important industrial applications, however, till the beginning of the 80s research on vanadium chemistry and biochemistry did not receive much attention from the scientific community. The understanding of the broad bioinorganic implications resulting from the similarities between phosphate and vanadate(V) and the discovery of vanadium dependent enzymes gave rise to an enormous increase in interest in the chemistry and biological relevance of vanadium. Thereupon the last 30years corresponded to a period of enormous research effort in these fields, as well as in medicinal applications of vanadium and in the development of catalysts for use in fine-chemical synthesis, some of these inspired by enzymatic active sites. Since the 80s my group in collaboration with others made contributions, described throughout this text, namely in the understanding of the speciation of vanadium compounds in aqueous solution and in biological fluids, and to the transport of vanadium compounds in blood plasma and their uptake by cells. Several new types of vanadium compounds were also synthesized and characterized, with applications either as prospective therapeutic drugs or as homogeneous or heterogenized catalysts for the production of fine chemicals. The developments made are described also considering the international context of the evolution of the knowledge in the chemistry and bioinorganic chemistry of vanadium compounds during the last 30years. This article was compiled based on the Vanadis Award presentation at the 9th International Vanadium Symposium.
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Scalese G, Benítez J, Rostán S, Correia I, Bradford L, Vieites M, Minini L, Merlino A, Coitiño EL, Birriel E, Varela J, Cerecetto H, González M, Pessoa JC, Gambino D. Expanding the family of heteroleptic oxidovanadium(IV) compounds with salicylaldehyde semicarbazones and polypyridyl ligands showing anti-Trypanosoma cruzi activity. J Inorg Biochem 2015; 147:116-25. [PMID: 25824466 DOI: 10.1016/j.jinorgbio.2015.03.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 03/01/2015] [Accepted: 03/04/2015] [Indexed: 01/01/2023]
Abstract
Searching for prospective vanadium-based drugs for the treatment of Chagas disease, a new series of heteroleptic [V(IV)O(L-2H)(NN)] compounds was developed by including the lipophilic 3,4,7,8-tetramethyl-1,10-phenanthroline (tmp) NN ligand and seven tridentate salicylaldehyde semicarbazone derivatives (L1-L7). The compounds were characterized in the solid state and in solution. EPR spectroscopy suggests that the NN ligand is bidentate bound through both nitrogen donor atoms in an axial-equatorial mode. The EPR and (51)V-NMR spectra of aerated solutions at room temperature indicate that the compounds are stable to hydrolysis and that no significant oxidation of V(IV) to V(V) takes place at least in 24h. The complexes are more active in vitro against Trypanosoma cruzi, the parasite responsible for Chagas disease, than the reference drug Nifurtimox and most of them are more active than previously reported [V(IV)O(L-2H)(NN)] complexes of other NN co-ligands. Selectivity towards the parasite was analyzed using J-774 murine macrophages as mammalian cell model. Due to both, high activity and high selectivity, L2, L4, L5 and L7 complexes could be considered new hits for further drug development. Lipophilicity probably plays a relevant role in the bioactivity of the new compounds. The [V(IV)O(L-2H)(NN)] compounds were designed aiming DNA as potential molecular target. Therefore, the novel L1-L7 tmp complexes were screened by computational modeling, comparing their DNA-binding features with those of previously reported [V(IV)O(L-2H)(NN)] compounds with different NN co-ligands. Whereas all the complexes interact well with DNA, with binding modes and strength tuned in different extents by the NN and semicarbazone co-ligands, molecular docking suggests that the observed anti-T. cruzi activity cannot be explained upon DNA intercalation as the sole mechanism of action.
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Affiliation(s)
- Gonzalo Scalese
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay
| | - Julio Benítez
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay
| | - Santiago Rostán
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay
| | - Isabel Correia
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Lara Bradford
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay
| | - Marisol Vieites
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay
| | - Lucía Minini
- Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Uruguay
| | - Alicia Merlino
- Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Uruguay
| | - E Laura Coitiño
- Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Uruguay
| | - Estefania Birriel
- Grupo de Química Medicinal, Laboratorio de Química Orgánica, Facultad de Ciencias-Facultad de Química, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Javier Varela
- Grupo de Química Medicinal, Laboratorio de Química Orgánica, Facultad de Ciencias-Facultad de Química, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Hugo Cerecetto
- Grupo de Química Medicinal, Laboratorio de Química Orgánica, Facultad de Ciencias-Facultad de Química, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Mercedes González
- Grupo de Química Medicinal, Laboratorio de Química Orgánica, Facultad de Ciencias-Facultad de Química, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - João Costa Pessoa
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Dinorah Gambino
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay.
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Gong J, Shi F, Ma B, Dong J, Pachiadaki M, Zhang X, Edgcomb VP. Depth shapes α- and β-diversities of microbial eukaryotes in surficial sediments of coastal ecosystems. Environ Microbiol 2015; 17:3722-37. [DOI: 10.1111/1462-2920.12763] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 12/23/2014] [Accepted: 12/23/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Gong
- Laboratory of Microbial Ecology; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai 264003 China
| | - Fei Shi
- Laboratory of Microbial Ecology; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai 264003 China
- College of Resources and Environment; University of Chinese Academy of Sciences; Beijing 100049 China
| | - Bin Ma
- Laboratory of Microbial Ecology; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai 264003 China
| | - Jun Dong
- Laboratory of Microbial Ecology; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai 264003 China
| | - Maria Pachiadaki
- Department of Geology and Geophysics; Woods Hole Oceanographic Institution; Woods Hole MA 02543 USA
| | - Xiaoli Zhang
- Laboratory of Microbial Ecology; Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yantai 264003 China
| | - Virginia P. Edgcomb
- Department of Geology and Geophysics; Woods Hole Oceanographic Institution; Woods Hole MA 02543 USA
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108
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Vlasiou M, Drouza C, Kabanos TA, Keramidas AD. Donor atom electrochemical contribution to redox potentials of square pyramidal vanadyl complexes. J Inorg Biochem 2015; 147:39-43. [PMID: 25660671 DOI: 10.1016/j.jinorgbio.2015.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 01/16/2015] [Accepted: 01/16/2015] [Indexed: 10/24/2022]
Abstract
A simple donor atom additivity relationship has been used to calculate the donor atom electrochemical contribution (DEC) of the Oac (acetylacetonate-enolic oxygen), OPh (phenolic oxygen), SPh (mercaptophenol sulfur), Nam (deprotonate amide nitrogen), Nim (imine nitrogen) and Npy (pyridine nitrogen) to the redox processes of the square pyramidal vanadyl complexes. The study focuses on the amidate vanadyl complexes because of (a) their biological interest and (b) the existence of data from plethora complexes studied in great details. The electrochemical contributions for the vanadyl oxidation and reduction processes increase following the same order, OPh~Oac(enolic)<SPh~Nam<Nim<Npy. These values predict the electrochemical potentials of square pyramidal vanadyl complexes with high accuracy. Octahedral complexes with the same equatorial environment show significant shift of the oxidation potentials to lower values. The DEC influence to the square pyramidal vanadyls' electrochemical potentials has been evaluated.
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Affiliation(s)
- Manolis Vlasiou
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus
| | - Chryssoula Drouza
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Lemesos 3036, Cyprus.
| | - Themistoklis A Kabanos
- Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 45110 Ioannina, Greece.
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Abstract
Vanadium is special in at least two respects: on the one hand, the tetrahedral anion vanadate(v) is similar to the phosphate anion; vanadate can thus interact with various physiological substrates that are otherwise functionalized by phosphate. On the other hand, the transition metal vanadium can easily expand its sphere beyond tetrahedral coordination, and switch between the oxidation states +v, +iv and +iii in a physiological environment. The similarity between vanadate and phosphate may account for the antidiabetic potential of vanadium compounds with carrier ligands such as maltolate and picolinate, and also for vanadium's mediation in cardiovascular and neuronal defects. Other potential medicinal applications of more complex vanadium coordination compounds, for example in the treatment of parasitic tropical diseases, may also be rooted in the specific properties of the ligand sphere. The ease of the change in the oxidation state of vanadium is employed by prokarya (bacteria and cyanobacteria) as well as by eukarya (algae and fungi) in respiratory and enzymatic functions. Macroalgae (seaweeds), fungi, lichens and Streptomyces bacteria have available haloperoxidases, and hence enzymes that enable the 2-electron oxidation of halide X(-) with peroxide, catalyzed by a Lewis-acidic V(V) center. The X(+) species thus formed can be employed to oxidatively halogenate organic substrates, a fact with implications also for the chemical processes in the atmosphere. Vanadium-dependent nitrogenases in bacteria (Azotobacter) and cyanobacteria (Anabaena) convert N2 + H(+) to NH4(+) + H2, but are also receptive for alternative substrates such as CO and C2H2. Among the enigmas to be solved with respect to the utilization of vanadium in nature is the accumulation of V(III) by some sea squirts and fan worms, as well as the purport of the nonoxido V(IV) compound amavadin in the fly agaric.
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Affiliation(s)
- Dieter Rehder
- Chemistry Department, University of Hamburg, 20146 Hamburg, Germany.
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110
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Gallardo-Vera F, Diaz D, Tapia-Rodriguez M, Fortoul van der Goes T, Masso F, Rendon-Huerta E, Montaño LF. Vanadium pentoxide prevents NK-92MI cell proliferation and IFNγ secretion through sustained JAK3 phosphorylation. J Immunotoxicol 2015; 13:27-37. [PMID: 25565016 DOI: 10.3109/1547691x.2014.996681] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Vanadium is a major air pollutant with toxic and carcinogenic effects; it also exercises immunosuppressive effects on the adaptive immune response. Its effect on the innate immune response is poorly explored. The aim of this study was to identify if vanadium pentoxide (V2O5) impairs the function of immunoregulatory NK cells and to determine possible mechanisms associated with this effect. Interleukin-2-independent NK-92MI cells were exposed to different V2O5 concentrations for 6, 12, or 24 h periods. Cell proliferation was then evaluated using CFSE staining, apoptosis by Annexin V binding, and necrosis by 7-AAD staining. The release of IL-2, -4, -6, -10, -17A, IFNγ, and TNFα by the cells were assessed using a human CBA kit. Expression of CD45, SOCS1, JAK3, pJAK3, STAT5, pSTAT5, IL-2R, IL-15R, Fas, and FasL in/on the cells was determined by flow cytometry; JAK3 and pJAK3 expression were also evaluated via confocal microscopy. The results indicated that V2O5 could inhibit NK-92MI cell proliferation and induce cell apoptosis in a dose- and time-related manner. V2O5 also inhibited IL-2, IL-10, and IFNγ secretion but mostly only after 24 h of exposure and with primarily the higher doses tested. V2O5 had no effect on expression of JAK3 and STAT5, but did cause an increase in pJAK3 and appeared to lead (trend) to reductions in levels of phosphorylated STAT5. V2O5 increased the expression of IL-2R, IL-15R, Fas, and FasL at concentrations above the 50-100 µM range. V2O5 had no effect on expression of the CD45 membrane phosphatase, but it did cause an increase in the expression of SOCS1. These results indicate that a key toxic effect of V2O5 on NK cells is a dysregulation of signaling pathways mediated by IL-2. These effects could help to explain the previously-reported deleterious effects on innate immune responses of hosts exposed to inhaled V2O5.
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Affiliation(s)
- Francisco Gallardo-Vera
- a Laboratorio Inmunobiología, Departamento de Biología Celular y Tisular, Facultad de Medicina
| | - Daniel Diaz
- b Departamento de Biología Celular y Fisiología
| | | | | | - Felipe Masso
- d Departamento de Fisiología , Instituto Nacional de Cardiología 'Ignacio Chávez' , México
| | - Erika Rendon-Huerta
- a Laboratorio Inmunobiología, Departamento de Biología Celular y Tisular, Facultad de Medicina
| | - Luis F Montaño
- a Laboratorio Inmunobiología, Departamento de Biología Celular y Tisular, Facultad de Medicina
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Mohamadi M, Yousef Ebrahimipour S, Torkzadeh-Mahani M, Foro S, Akbari A. A mononuclear diketone-based oxido-vanadium(iv) complex: structure, DNA and BSA binding, molecular docking and anticancer activities against MCF-7, HPG-2, and HT-29 cell lines. RSC Adv 2015. [DOI: 10.1039/c5ra13715b] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A mononuclear oxido-vanadium(iv) complex, [VO(L)2], has been synthesized and its interactions with DNA and BSA have been investigated experimentally and theoretically.
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Affiliation(s)
- Maryam Mohamadi
- Department of Chemistry
- Faculty of Science
- Shahid Bahonar University of Kerman
- Kerman
- Iran
| | | | - Masoud Torkzadeh-Mahani
- Department of Biotechnology
- Institute of Science
- High Technology and Environmental Science
- Graduate University of Advance Technology
- Kerman
| | - Sabine Foro
- Materials Science Department
- 64287 Darmstadt
- Germany
| | - Alireza Akbari
- Department of Chemistry
- Payam Noor University (PNU)
- 19395-4697 Tehran
- Iran
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112
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Peys N, Maurelli S, Reekmans G, Adriaensens P, De Gendt S, Hardy A, Van Doorslaer S, Van Bael MK. Chemical composition of an aqueous oxalato-/citrato-VO(2+) solution as determinant for vanadium oxide phase formation. Inorg Chem 2014; 54:69-78. [PMID: 25517211 DOI: 10.1021/ic5015779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aqueous solutions of oxalato- and citrato-VO(2+) complexes are prepared, and their ligand exchange reaction is investigated as a function of the amount of citrate present in the aqueous solution via continuous-wave electron paramagnetic resonance (CW EPR) and hyperfine sublevel correlation (HYSCORE) spectroscopy. With a low amount of citrate, monomeric cis-oxalato-VO(2+) complexes occur with a distorted square-pyramidal geometry. As the amount of citrate increases, oxalate is gradually exchanged for citrate. This leads to (i) an intermediate situation of monomeric VO(2+) complexes with a mix of oxalate/citrate ligands and (ii) a final situation of both monomeric and dimeric complexes with exclusively citrato ligands. The monomeric citrato-VO(2+) complexes dominate (abundance > 80%) and are characterized by a 6-fold chelation of the vanadium(IV) ion by 4 RCO2(-) ligands at the equatorial positions and a H2O/R-OH ligand at the axial position. The different redox stabilities of these complexes, relative to that of dissolved O2 in the aqueous solution, is analyzed via (51)V NMR. It is shown that the oxidation rate is the highest for the oxalato-VO(2+) complexes. In addition, the stability of the VO(2+) complexes can be drastically improved by evacuation of the dissolved O2 from the solution and subsequent storage in a N2 ambient atmosphere. The vanadium oxide phase formation process, starting with the chemical solution deposition of the aqueous solutions and continuing with subsequent processing in an ambient 0.1% O2 atmosphere, differs for the two complexes. The oxalato-VO(2+) complexes turn into the oxygen-deficient crystalline VO2 B at 400 °C, which then turns into crystalline V6O13 at 500 °C. In contrast, the citrato-VO(2+) complexes form an amorphous film at 400 °C that crystallizes into VO2 M1 and V6O13 at 500 °C.
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Affiliation(s)
- Nick Peys
- Institute for Materials Research, Inorganic and Physical Chemistry and ‡Applied and Analytical Chemistry, Institute for Materials Research, Hasselt University , Diepenbeek, Belgium
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Sánchez-Lombardo I, Sánchez-Lara E, Pérez-Benítez A, Mendoza Á, Bernès S, González-Vergara E. Synthesis of Metforminium(2+) Decavanadates - Crystal Structures and Solid-State Characterization. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402277] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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114
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A New Dicationic Ring [(Water)6–(Ammonium)2] Acts as a Building Block for a Supramolecular 3D Assembly of Decavanadate Clusters and 4-(N,N-dimethylamino)pyridinium Ions. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0779-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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115
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Zwolak I. Comparison of three different cell viability assays for evaluation of vanadyl sulphate cytotoxicity in a Chinese hamster ovary K1 cell line. Toxicol Ind Health 2014; 32:1013-25. [DOI: 10.1177/0748233714544190] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Previously, evaluation of sodium metavanadate (NaVO3) cytotoxicity after 24 h exposure of Chinese hamster ovary K1 (CHO-K1) cells revealed different sensitivity of the in vitro assays used starting from the neutral red (NR, 3-amino-7-dimethylamino-2-methylphenazine hydrochloride) test (detecting lysosomal and possibly the Golgi apparatus damage) as the most sensitive followed by the 2,3-bis[2-methoxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxyanilide inner salt (XTT) and resazurin (7-hydroxy-3H-phenoxazin-3-one-10-oxide) tests (mitochondrial disruption). The trypan blue (TB) staining (plasma membrane permeability) showed cytotoxicity of NaVO3 at a much higher NaVO3 concentration than the above-mentioned assays. In the current study, using the same experimental approach, we have assessed the toxicity of vanadyl sulphate (VOSO4) and compared the obtained results with NaVO3 action. Unlike metavanadate, VOSO4 treatment at 24 h resulted in similar sensitivity of the NR and resazurin tests. Nevertheless, following the 48-h incubation with VOSO4, the NR test showed markedly higher sensitivity than the resazurin test when comparing the half maximal inhibitory concentration values (61 and 110 µM for the NR and resazurin test, respectively, p < 0.05). The TB staining method was the least susceptible for detecting vanadyl cytotoxicity at each exposure time point. In summary, both the NR and resazurin tests can be advocated as similarly sensitive in detection of VOSO4-induced cytotoxicity in the CHO-K1 cell line at 24 h. However, the longer incubation time with VOSO4 showed that the NR test is more sensitive than the resazurin assay. The differences in the results between the cytotoxicity tests employed probably arise from dissimilar susceptibility of the endpoints (targets) measured with these tests to the damage by vanadium. Considering this, the current and the previous studies highlight the role of lysosomes (and possibly the Golgi apparatus) apart from mitochondria in the toxicity mechanism induced by inorganic vanadium in mammalian cells.
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Affiliation(s)
- Iwona Zwolak
- Department of Cell Biology, Institute of Environmental Protection, The John Paul II Catholic University of Lublin, Poland
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116
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Vanadium complexes with side chain functionalized N-salicylidene hydrazides: Hydrogen-bonding relays as structural directive for supramolecular interactions. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.03.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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117
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Levina A, McLeod AI, Lay PA. Vanadium Speciation by XANES Spectroscopy: A Three-Dimensional Approach. Chemistry 2014; 20:12056-60. [DOI: 10.1002/chem.201403993] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Indexed: 11/09/2022]
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118
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Drouza C, Vlasiou M, Keramidas AD. Synthesis, characterization of dinuclear vanadium(III) hydroquinonate–iminodiacetate complexes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.12.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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119
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Fedorova EV, Buryakina AV, Zakharov AV, Filimonov DA, Lagunin AA, Poroikov VV. Design, synthesis and pharmacological evaluation of novel vanadium-containing complexes as antidiabetic agents. PLoS One 2014; 9:e100386. [PMID: 25057899 PMCID: PMC4109918 DOI: 10.1371/journal.pone.0100386] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 05/27/2014] [Indexed: 11/19/2022] Open
Abstract
Based on the data about structure and antidiabetic activity of twenty seven vanadium and zinc coordination complexes collected from literature we developed QSAR models using the GUSAR program. These QSAR models were applied to 10 novel vanadium coordination complexes designed in silico in order to predict their hypoglycemic action. The five most promising substances with predicted potent hypoglycemic action were selected for chemical synthesis and pharmacological evaluation. The selected coordination vanadium complexes were synthesized and tested in vitro and in vivo for their hypoglycemic activities and acute rat toxicity. Estimation of acute rat toxicity of these five vanadium complexes was performed using a freely available web-resource (http://way2drug.com/GUSAR/acutoxpredict.html). It has shown that the selected compounds belong to the class of moderate toxic pharmaceutical agents, according to the scale of Hodge and Sterner. Comparison with the predicted data has demonstrated a reasonable correspondence between the experimental and predicted values of hypoglycemic activity and toxicity. Bis{tert-butyl[amino(imino)methyl]carbamato}oxovanadium (IV) and sodium(2,2'-Bipyridyl)oxo-diperoxovanadate(V) octahydrate were identified as the most potent hypoglycemic agents among the synthesized compounds.
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Affiliation(s)
- Elena V. Fedorova
- Saint-Petersburg State Chemical Pharmaceutical Academy, Ministry of Healthcare and Social Development of Russian Federation, Saint-Petersburg, Russian Federation
| | - Anna V. Buryakina
- Saint-Petersburg State Chemical Pharmaceutical Academy, Ministry of Healthcare and Social Development of Russian Federation, Saint-Petersburg, Russian Federation
| | - Alexey V. Zakharov
- National Cancer Institute, National Institutes of Health, Frederick, Maryland, United States of America
- Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Moscow, Russian Federation
| | - Dmitry A. Filimonov
- Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Moscow, Russian Federation
| | - Alexey A. Lagunin
- Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Moscow, Russian Federation
| | - Vladimir V. Poroikov
- Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Moscow, Russian Federation
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120
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Shah HS, Al-Oweini R, Haider A, Kortz U, Iqbal J. Cytotoxicity and enzyme inhibition studies of polyoxometalates and their chitosan nanoassemblies. Toxicol Rep 2014; 1:341-352. [PMID: 28962250 PMCID: PMC5598103 DOI: 10.1016/j.toxrep.2014.06.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 06/01/2014] [Accepted: 06/01/2014] [Indexed: 12/19/2022] Open
Abstract
Polyoxometalates (POMs) have become very significant in biomedical research for their structural diversity which renders them highly active against bacterial, viral and cancer diseases. In this study three different POMs were synthesized and nanoassemblies were made with chitosan (CTS), a natural biodegradable polymer with excellent drug carrier properties. The compounds were tested on two isoenzymes of alkaline phosphatases including tissue specific calf intestine alkaline phosphatase (CIAP) and tissue non-specific alkaline phosphatase (TNAP). Compound [TeW6O24]6− (TeW6) showed the highest activity (45.4 ± 11.3 nM) among tested compounds against TNAP. Similarly, chitosan-[TeW6O24]6− (CTS-TeW6) was proved to be a potent inhibitor of CIAP with Ki value of 22 ± 7 nM. A comparative study was made to evaluate their cytotoxic potential against HeLa cells. Among all tested compounds, Chitosan-[NaP5W30O110]14− (CTS-P5W30) has showed higher percent cytotoxicity (88 ± 10%) at 10 μM when compared with the standard anticancer drug vincristine (72 ± 7%). The study revealed that selected POMs proved excellent anticancer potential and were equally effective against alkaline phosphatase enzyme, an increased level of which may indicate cancer metastasis.
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Affiliation(s)
- Hamid Saeed Shah
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Rami Al-Oweini
- School of Engineering and Science, Jacobs University, P.O. Box 750 561, 28725 Bremen, Germany
| | - Ali Haider
- School of Engineering and Science, Jacobs University, P.O. Box 750 561, 28725 Bremen, Germany
| | - Ulrich Kortz
- School of Engineering and Science, Jacobs University, P.O. Box 750 561, 28725 Bremen, Germany
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
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121
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Roy A, Pradhan M, Ray C, Sahoo R, Dutta S, Pal T. Facile synthesis of pyridine intercalated ultra-long V2O5nanowire from commercial V2O5: catalytic applications in selective dye degradation. CrystEngComm 2014. [DOI: 10.1039/c4ce00708e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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122
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Tang Z, Deng W, Wang Y, Zhu E, Wan X, Zhang Q, Wang Y. Transformation of cellulose and its derived carbohydrates into formic and lactic acids catalyzed by vanadyl cations. CHEMSUSCHEM 2014; 7:1557-1567. [PMID: 24798653 DOI: 10.1002/cssc.201400150] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 06/03/2023]
Abstract
The transformation of cellulose or cellulose-derived carbohydrates into platform chemicals is the key to establish biomass-based sustainable chemical processes. The systems able to catalyze the conversion of cellulose into key chemicals in water without the consumption of hydrogen are limited. We report that simple vanadyl (VO(2+)) cations catalyze the conversions of cellulose and its monomer, glucose, into lactic acid and formic acid in water. We have discovered an interesting shift of the major product from formic acid to lactic acid on switching the reaction atmosphere from oxygen to nitrogen. Our studies suggest that VO(2+) catalyzes the isomerization of glucose to fructose, the retro-aldol fragmentation of fructose to two trioses, and the isomerization of trioses, which leads to the formation of lactic acid under anaerobic conditions. The oxidative cleavage of C-C bonds in the intermediates caused by the redox conversion of VO2(+)/VO(2+) under aerobic conditions results in formic acid and CO2. We demonstrate that the addition of an alcohol suppresses the formation of CO2 and enhances the formic acid yield significantly to 70-75 %.
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Affiliation(s)
- Zhenchen Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (PR China)
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123
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Soe CZ, Pakchung AAH, Codd R. Dinuclear [(VVO(putrebactin))2(μ-OCH3)2] Formed in Solution as Established from LC-MS Measurements Using 50V-Enriched V2O5. Inorg Chem 2014; 53:5852-61. [DOI: 10.1021/ic500787v] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cho Zin Soe
- School of Medical Sciences (Pharmacology) and Bosch Institute and ‡School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Amalie A. H. Pakchung
- School of Medical Sciences (Pharmacology) and Bosch Institute and ‡School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Rachel Codd
- School of Medical Sciences (Pharmacology) and Bosch Institute and ‡School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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124
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Yoshikawa Y, Sakurai H, Crans DC, Micera G, Garribba E. Structural and redox requirements for the action of anti-diabetic vanadium compounds. Dalton Trans 2014; 43:6965-72. [PMID: 24668346 DOI: 10.1039/c3dt52895b] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study presents the first systematic investigation of the anti-diabetic properties of non-oxido V(IV) complexes. In particular, the insulin-mimetic activity of [V(IV)(taci)2](4+), [V(IV)(inoH-3)2](2-), [V(IV)(dhab)2], [V(IV)(hyph(Ph))2], [V(IV)(cat)3](2-) and [V(IV)(pdbh)2]--where taci is 1,3,5-triamino-1,3,5-trideoxy-cis-inositol, ino is cis-inositol, H2dhab is 2,2'-dihydroxyazobenzene, H2hyph(Ph) is 3,5-bis(2-hydroxyphenyl)-1H-1,2,4-triazole, H2cat is catechol and H2pdbh is pentan-2,4-dione benzoylhydrazone--was evaluated in terms of free fatty acid (FFA) release. Among the six compounds examined, only [V(IV)(pdbh)2], [V(IV)(cat)3](2-) and [V(IV)(hyph(Ph))2], which at the physiological pH convert to the corresponding V(IV)O complexes, were found to exhibit a significant insulin-mimetic activity compared to VOSO4. In contrast, [V(taci)2](4+), [V(inoH-3)2](2-) and [V(dhab)2], which at pH 7.4 keep their 'bare' non-oxido structure, did not cause any inhibition of FFA. The results, therefore, suggest that a V(IV)O functionality is necessary for vanadium complexes to exhibit anti-diabetic effects. This agrees with the notion that the biotransformations of V compounds in the organism are more important than the nature of the species.
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Affiliation(s)
- Yutaka Yoshikawa
- Department of Health, Sports, and Nutrition, Faculty of Health Welfare, Kobe Woman's University, Kobe, Japan
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