401
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Romanowski G, Sikorski A, Wojtczak A. Di-μ-oxido-bis-({(R)-(-)-2-[1-(2-amino-propyl-imino)eth-yl]-1-naphtholato-κN,N',O}oxidovanadium(V)). Acta Crystallogr Sect E Struct Rep Online 2008; 64:m950-1. [PMID: 21202800 PMCID: PMC2961648 DOI: 10.1107/s160053680801787x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2008] [Accepted: 06/12/2008] [Indexed: 11/11/2022]
Abstract
In the title dinuclear compound, [V2(C15H17N2O)2O4], each VV atom is six-coordinated by one oxide group, and by two N and one O atom of the tridentate Schiff base ligand, and bridged by two additional oxide O atoms, resulting in a centrosymmetric dimer. The metal centre has a distorted octahedral coordination with the monoanionic Schiff base ligand occupying one equatorial and two axial coordination positions. The separation between V atoms is 3.214 (3) Å. In the crystal structure, there are N—H⋯O, C—H⋯O and C—H⋯π hydrogen bonds, and π–π interactions.
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402
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Anwar-Mohamed A, El-Kadi AOS. Down-regulation of the carcinogen-metabolizing enzyme cytochrome P450 1a1 by vanadium. Drug Metab Dispos 2008; 36:1819-27. [PMID: 18541696 DOI: 10.1124/dmd.108.021154] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Vanadium (V(5+)), a heavy metal contaminant with important toxicological consequences, has received considerable attention as an anticancer agent, although the mechanisms remain unknown. As a first step to investigate these mechanisms, we examined the effect of V(5+) (as ammonium metavanadate, NH(4)VO(3)) on the expression of the aryl hydrocarbon receptor (AhR)-regulated gene: cytochrome P450 1a1 (Cyp1a1) at each step of the AhR signal transduction pathway, using Hepa 1c1c7 cells. Our results showed a significant reduction in 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-mediated induction of Cyp1a1 mRNA, protein and activity levels after V(5+) treatments in a dose-dependent manner. Investigation of the effect of coexposure to V(5+) and TCDD at transcriptional levels revealed that V(5+) significantly inhibited TCDD-mediated induction of AhR-dependent luciferase reporter gene expression. Furthermore, despite not affecting the direct activation of the cytosolic AhR by TCDD and subsequently transforming it to a DNA-binding form, V(5+) inhibited the nuclear accumulation of liganded AhR and subsequent formation of the AhR/aryl hydrocarbon nuclear translocator (Arnt)/xenobiotic responsive element (XRE) complex. Importantly, the V(5+)-mediated inhibition of AhR/Arnt/XRE complex formation coincided with a significant decrease in ecto-ATPase activity. Looking at the post-transcriptional and post-translational effects of V(5+) on existing Cyp1a1 mRNA and protein levels, we showed that V(5+) did not affect Cyp1a1 mRNA or protein stability, thus eliminating possible role of V(5+) in modifying Cyp1a1 gene expression through these mechanisms. This study provides the first evidence that V(5+) down-regulates the expression of Cyp1a1 at the transcriptional level through an ATP-dependent mechanism.
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Affiliation(s)
- Anwar Anwar-Mohamed
- Faculty of Pharmacy and Pharmaceutical Sciences, 3126 Dentistry/Pharmacy Centre, University of Alberta, Edmonton, AB, Canada.
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403
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Mondal B, Ghosh T, Sutradhar M, Mukherjee G, Drew MG, Ghosh T. Synthesis, structure and solution chemistry of a family of dinuclear hydrazonato-vanadium(V) complexes with [OV(μ-O)VO]4+ core. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.03.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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404
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Fu Y, Wang Q, Yang XG, Yang XD, Wang K. Vanadyl bisacetylacetonate induced G1/S cell cycle arrest via high-intensity ERK phosphorylation in HepG2 cells. J Biol Inorg Chem 2008; 13:1001-9. [PMID: 18483753 DOI: 10.1007/s00775-008-0387-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Accepted: 04/30/2008] [Indexed: 12/22/2022]
Abstract
In recent years the anticancer properties of vanadium compounds have been noticed, but the underlying mechanisms are not well understood. In the present work, we found that vanadyl bisacetylacetonate ([VO(acac)(2)]) blocked cell cycle progression permanently at G1 phase in a dose- and time-dependent manner in HepG2 cells. This was further evidenced by the growth regulatory signals during the G1 stage. After the treatment with [VO(acac)(2)], the level of phosphorylation of retinoblastoma tumor suppressor protein (pRb) and the expressions of cyclin D1, cyclin E and cyclin A were reduced, while the expression of a cyclin-dependent kinase inhibitor p21 was increased dose-dependently. In the meantime, neither O(2)(*-) nor H(2)O(2) level was observed to increase. Interestingly, the levels of phosphorylated extracellular signal-regulated protein kinase (ERK) and Akt were highly activated. After 1-h pretreatment with a lower concentration of MEK inhibitor U0126, the level of phosphorylated pRb was restored, indicating a release of cell cycle arrest. Taken together, we suggested that [VO(acac)(2)]-induced proliferation inhibition was caused by G1/S cell cycle arrest, which resulted from the decreased level of phosphorylated pRb in its active hypophosphorylated form via a highly activated ERK signal in HepG2 cells. The results presented here provided new insight into the development of vanadium compounds as potential anticancer agents.
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Affiliation(s)
- Ying Fu
- Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100083, People's Republic of China
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405
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Gkionis K, Platts JA, Hill JG. Insights into DNA Binding of Ruthenium Arene Complexes: Role of Hydrogen Bonding and π Stacking. Inorg Chem 2008; 47:3893-902. [DOI: 10.1021/ic702459h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - James A. Platts
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K
| | - J. Grant Hill
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K
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406
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Carn F, Steunou N, Djabourov M, Coradin T, Ribot F, Livage J. First example of biopolymer-polyoxometalate complex coacervation in gelatin- mixtures. SOFT MATTER 2008; 4:735-738. [PMID: 32907176 DOI: 10.1039/b719216a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The first example of complex coacervation between a biopolymer and polyoxometalate clusters is identified in the gelatin-decavanadate system.
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Affiliation(s)
- Florent Carn
- UPMC Univ Paris 06, Collège de France, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris (L.C.M.C.P.), F-75252, Paris Cedex 05, France.
| | - Nathalie Steunou
- UPMC Univ Paris 06, Collège de France, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris (L.C.M.C.P.), F-75252, Paris Cedex 05, France.
| | | | - Thibaud Coradin
- UPMC Univ Paris 06, Collège de France, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris (L.C.M.C.P.), F-75252, Paris Cedex 05, France.
| | - François Ribot
- UPMC Univ Paris 06, Collège de France, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris (L.C.M.C.P.), F-75252, Paris Cedex 05, France.
| | - Jacques Livage
- UPMC Univ Paris 06, Collège de France, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris (L.C.M.C.P.), F-75252, Paris Cedex 05, France.
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407
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Samanta S, Swamy V, Suresh D, Rajkumar M, Rana B, Rana A, Chatterjee M. Protective effects of vanadium against DMH-induced genotoxicity and carcinogenesis in rat colon: Removal of O6-methylguanine DNA adducts, p53 expression, inducible nitric oxide synthase downregulation and apoptotic induction. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2008; 650:123-31. [DOI: 10.1016/j.mrgentox.2007.11.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 10/12/2007] [Accepted: 11/04/2007] [Indexed: 12/18/2022]
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408
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Sasmal PK, Patra AK, Nethaji M, Chakravarty AR. DNA Cleavage by New Oxovanadium(IV) Complexes of N-Salicylidene α-Amino Acids and Phenanthroline Bases in the Photodynamic Therapy Window. Inorg Chem 2007; 46:11112-21. [DOI: 10.1021/ic7011793] [Citation(s) in RCA: 147] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pijus K. Sasmal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Ashis K. Patra
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Munirathinam Nethaji
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Akhil R. Chakravarty
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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409
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Abstract
Hydroxyapatite (HA) and apatite based biomaterials are important for bone replacement.
Different apatites could be produced by substituting calcium, phosphate or hydroxyl groups,
resulting in new materials with different physical, chemical and biological properties. In this work
we investigate the biological compatibility of apatites modified by divalent cations in cultured
mammalian cells using Balb/c 3T3 fibroblasts cell line. Modified apatites, Ca9.5M0.5(PO4)6(OH)2
(M=Fe, Zn, Cu, Co, Sr, V e Pb) and Ca10(VO4)6(OH)2 were produced and characterized by FTIR,
XRD and XRF. Extracts of each metal-modified apatites (0.1mg/mL of Dulbeco Modified Eagle
Medium – DMEM without serum) were obtained. Cells (3x104) were exposed for 24 h/37C to the
pure extract (100%). Afterwards, the number of viable cells was determined in a hemocitometer.
The number of viable cells in the absence of any extract was taking as 100%. SHA didn’t present
any toxicity while phenol killed 82% of the cells. In the presence of pure extract of Fe-HA or Sr-
HA an increase of 70% and 20%, respectively, in the number of relative cells was observed. On the
other hand, the number of residual cells after treatment with the pure extract of Pb+2, Zn+2, Co+2,
and (VO4)3- was73, 65, 48, and 21%, respectively. In conclusion, cells response was strongly
dependent on the metal that substitutes calcium or phosphate. Further studies are required to better
understand the biological effect of these substitutions.
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410
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Noutsopoulos D, Markopoulos G, Koliou M, Dova L, Vartholomatos G, Kolettas E, Tzavaras T. Vanadium Induces VL30 Retrotransposition at an Unusually High Level: A Possible Carcinogenesis Mechanism. J Mol Biol 2007; 374:80-90. [DOI: 10.1016/j.jmb.2007.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2007] [Revised: 08/14/2007] [Accepted: 09/04/2007] [Indexed: 10/22/2022]
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411
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412
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Molinuevo MS, Cortizo AM, Etcheverry SB. Vanadium(IV) complexes inhibit adhesion, migration and colony formation of UMR106 osteosarcoma cells. Cancer Chemother Pharmacol 2007; 61:767-73. [PMID: 17576559 DOI: 10.1007/s00280-007-0532-6] [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] [Received: 11/15/2006] [Accepted: 05/05/2007] [Indexed: 11/28/2022]
Abstract
Vanadium is a trace element widely distributed in the environment. In vertebrates it is mainly stored in bone tissue. The unique cellular environment in the bone and the variety of interactions that mediate cancer metastasis determine that certain types of cancer, such as breast and prostate cancer, preferentially metastize in the skeleton. Since this effect usually signifies serious morbidity and grave prognosis there is an increasing interest in the development of new treatments for this pathology. The present work shows that vanadium complexes can inhibit some parameters related to cancer metastasis such as cell adhesion, migration and clonogenicity. We have also investigated the role of protein kinase A in these processes.
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Affiliation(s)
- María S Molinuevo
- Cátedra de Bioquímica Patológica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
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413
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Abstract
The development of metal complexes with platinum central atoms such as cisplatin or carboplatin had an enormous impact on current cancer chemotherapy. However, the spectrum of cancers that can be treated with platinum agents is narrow and treatment efficacy suffers from side effects and resistance phenomena. These unresolved problems in platinum-based anti-cancer therapy have stimulated increased research efforts in the search for novel non platinum-containing metal species as cytostatic agents. Preclinical and clinical investigations showed that the development of new metal agents with modes of action different from cisplatin is possible. Thus, complexes with iron, cobalt, or gold central atoms have shown promising results in preclinical studies and compounds with titanium, ruthenium, or gallium central atoms have already been evaluated in phase I and phase II trials. This review covers some relevant examples of preclinical and clinical research on novel non platinum metal complexes.
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Affiliation(s)
- Ingo Ott
- Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany.
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414
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Chakraborty T, Swamy AHMV, Chatterjee A, Rana B, Shyamsundar A, Chatterjee M. Molecular basis of vanadium-mediated inhibition of hepatocellular preneoplasia during experimental hepatocarcinogenesis in rats. J Cell Biochem 2007; 101:244-58. [PMID: 17243116 DOI: 10.1002/jcb.21169] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Carcinogen-induced early DNA lesions and metallothionein (MT) over-expression have been implicated in cell proliferation and thereby subsequent expression of premalignant phenotype of the cell. We have therefore investigated the chemopreventive potential of vanadium in a multi-biomarker approach, viz. 8-hydroxy-2'-deoxyguanosines (8-OHdGs), DNA single-strand breaks (SSBs), DNA-protein crosslinks (DPCs), chromosomal aberrations (CAs), in situ MT expression, and cell proliferation in rat liver preneoplasia. Hepatocarcinogenesis was induced in male Sprague-Dawley rats with a single, necrogenic, intraperitoneal (i.p.) injection of diethylnitrosamine (DEN) (200 mg/Kg body weight) at week 4 of the experimental protocol followed by promotion with phenobarbital (PB) (0.05% in basal diet), on and from week 8 and continued till 32 weeks in a long-term regimen. There was a significant and steady elevation of modified DNA bases 8-OHdGs (P < 0.0001; 90.69%) along with substantial increments of the extent of SSBs (P < 0.001) and CAs (P < 0.001) following DEN exposure. Supplementation of vanadium at a dose of 0.5 ppm abated the formations of 8-OHdGs (80.63%; P < 0.0001), SS-DNAs (P < 0.001) and SSBs/DNA unit (P < 0.01; 56.39%), DPCs (59.26%; P < 0.0001) and CAs (71.52%; P < 0.001) in preneoplastic rat liver studied at various time points. Low dose of vanadium treatment further reduced liver-MT immunoreactivity (P < 0.05) and BrdU-labeling index (P < 0.02) and a significant positive correlation (r = 0.92; r2 = 0.85; P = 0.0001) was noted between them. Continuous vanadium administration also decreased nodular incidence (66.67%) and nodule multiplicity (62.12%; P < 0.001) along with substantial improvement in the altered hepatocellular phenotype when compared to DEN + PB treatment alone. The study indicates that vanadium-mediated suppression of cell proliferation and resulting premalignant expression might be due to the observed reductions in hepatic 8-OHdGs, SSBs, DPCs, CAs, and MT immunoreactivity. Vanadium is chemopreventive for DEN-induced hepatocellular preneoplasia in rats.
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Affiliation(s)
- Tridib Chakraborty
- Division of Biochemistry, Department of Pharmaceutical Technology, Jadavpur University, PO Box 17028, Calcutta-700032, West-Bengal, India
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415
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Capella MAM, Capella LS, Valente RC, Gefé M, Lopes AG. Vanadate-induced cell death is dissociated from H2O2 generation. Cell Biol Toxicol 2007; 23:413-20. [PMID: 17457679 DOI: 10.1007/s10565-007-9003-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2006] [Accepted: 02/07/2007] [Indexed: 10/25/2022]
Abstract
Vanadium is an environmentally toxic metal with peculiar and sometimes contradictory cellular effects. It is insulin-mimetic, it can either stimulate cell growth or induce cell death, and it has both mutagenic and antineoplastic properties. However, the mechanisms involved in those effects are poorly understood. Several studies suggest that H(2)O(2) is involved in vanadate-induced cell death, but it is not known whether cellular sensitivity to vanadate is indeed related to H(2)O(2) generation. In the present study, the sensitivity of four cell lines from different origins (K562, K562-Lucena 1, MDCK, and Ma104) to vanadate and H(2)O(2) was evaluated and the production of H(2)O(2) by vanadate was analyzed by flow cytometry. We show that cell lines very resistant to H(2)O(2) (K562, K562-Lucena 1, and Ma104 cells) are much more sensitive to vanadate than MDCK, a cell line relatively susceptible to H(2)O(2), suggesting that vanadate-induced cytotoxicity is not directly related to H(2)O(2) responsiveness. In accordance, vanadate concentrations that reduced cellular viability to approximately 60-70% of the control (10 mumol/L) did not induce H(2)O(2) formation. A second hypothesis, that peroxovanadium (PV) compounds, produced once vanadate enters into the cells, are responsible for the cytotoxicity, was only partially confirmed because MDCK cells were resistant to both vanadate and PV compounds (10 micromol/L each). Therefore, our results suggest that vanadate toxicity occurs by two distinct pathways, one dependent on and one independent of H(2)O(2) production.
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Affiliation(s)
- M A M Capella
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, RJ, Brazil.
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416
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Synthesis, structure, solution chemistry and the electronic effect of para substituents on the vanadium center in a family of mixed-ligand [VVO(ONO)(ON)] complexes. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.10.003] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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417
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Back DF, Bonfada E, de Oliveira GM, Lang ES. Chelation of ThIV, EuIII and NdIII by dianionic N,N′-bis(pyridoxylideneiminato)ethylene, (Pyr2en)2−. On the search of feasible modelings for heavy metals damage inhibition in living beings. J Inorg Biochem 2007; 101:709-14. [PMID: 17316813 DOI: 10.1016/j.jinorgbio.2007.01.002] [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: 09/05/2006] [Revised: 12/28/2006] [Accepted: 01/09/2007] [Indexed: 10/23/2022]
Abstract
The neutral Schiff base N,N'-bis(pyridoxylideneiminato)ethylene {H(2)pyr(2)en} reacts with Th(NO(3))4.4H2O, NdCl3.6H2O and EuCl3.6H2O to give [Th(pyr(2)en)2(H2O)] (1), [Nd(pyr(2)en)(Hpyr(2)en)].12H2O (2) and [Eu(pyr(2)en)(Hpyr(2)en)] (3). In the three not yet reported bimolecular chelate systems the endo hydroxyl groups of the rings undergo deprotonation confirming the remarkable ability of the pyridoxal-containing ligand H(2)pyr(2)en to yield stable heavy metal chelates with unusual coordination polyhedra. Complexes 2 and 3 show a coordination number 8 for Nd and Eu, achieving a distorted quadratic antiprism. In complex 1 the additional water molecule increases the coordination number of Th to 9 producing a capped square antiprism. The synthesis and structural elucidation of the title complexes starting from a probably non-toxic metabolite like H(2)pyr(2)en should represent a useful contribution to the research on models of prevention and therapy of damage caused by radioactive and heavy elements.
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Affiliation(s)
- Davi Fernando Back
- Departamento de Química, Laboratório de Materiais Inorgânicos, Universidade Federal de Santa María, 97105-900 Santa Maria, RS, Brazil
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418
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Ghosh T, Mondal B, Patra R. A study on the electronic effect of para substituents in the aryloxy ring of the hydrazone ligands on the vanadium centre in a family of mixed-ligand [VVO(ONO)(OO)] complexes. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-007-0191-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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419
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Silwood CJL, Grootveld M. 1H and 51V NMR investigations of the molecular nature of implant-derived vanadium ions in osteoarthritic knee-joint synovial fluid. Clin Chim Acta 2007; 380:89-99. [PMID: 17346687 DOI: 10.1016/j.cca.2007.01.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Revised: 01/08/2007] [Accepted: 01/08/2007] [Indexed: 11/26/2022]
Abstract
BACKGROUND High field (1)H and (51)V NMR spectroscopies were employed to determine the oxidation state and complexation status of vanadium ions in intact osteoarthritic knee-joint synovial fluid (OA SF) when pre-added as V(III)((aq.)), V(IV)((aq.)) and V(V)((aq.)). METHODS Aliquots of each vanadium solution were added to the SF samples and their (1)H NMR spectra recorded. (51)V NMR spectra were also recorded for the samples to which V(III)((aq.)) had been added. Theoretical computer simulations of the competitive complexation of vanadium ions by a range of low-molecular-mass biomolecules were also performed. RESULTS The spectroscopic results demonstrated that addition of vanadium ions to intact OA SF gave rise to their complexation by a range of low-molecular-mass biomolecules. The results indicated the physiologically-significant complexing abilities of histidine, threonine, glycine, tyrosine and citrate for each of the added metal ions. The computer simulations revealed that the relative capacity of OA SF complexants to compete for available V(III), V(IV) and V(V) ions reflected the thermodynamic stability constants for such complexes and their available concentrations in this biofluid. CONCLUSIONS Since comparatively low concentrations of added metal ion are required to selectively influence spectral properties, the "speciation" of prostheses-derived metal ions in biofluids and tissues can be ascertained through the facile employment of high resolution NMR spectroscopy.
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Affiliation(s)
- Christopher J L Silwood
- Department of Applied Science, Faculty of Engineering, Science and the Built Environment, London South Bank University, 103 Borough Road, London SE1 0AA, UK
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420
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Suzuki K, Inageda K, Nishitai G, Matsuoka M. Phosphorylation of p53 at serine 15 in A549 pulmonary epithelial cells exposed to vanadate: involvement of ATM pathway. Toxicol Appl Pharmacol 2007; 220:83-91. [PMID: 17292432 DOI: 10.1016/j.taap.2006.12.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2006] [Revised: 12/23/2006] [Accepted: 12/28/2006] [Indexed: 11/24/2022]
Abstract
When A549 cells were exposed to sodium metavanadate (NaVO(3)), the pentavalent species of vanadium (vanadate), phosphorylation of p53 protein at Ser15 was found in a time (8-48 h)- and dose (10-200 microM)-dependent manner. After the incubation with 50 or 100 microM NaVO(3) for 48 h, accumulation of p53 protein was accompanied with Ser15 phosphorylation. Among serines in p53 protein immunoprecipitated from A549 cells treated with 100 microM NaVO(3) for 48 h, only Ser15 was markedly phosphorylated. Treatment with other vanadate compounds, sodium orthovanadate (Na(3)VO(4)) and ammonium metavanadate (NH(4)VO(3)), also induced Ser15 phosphorylation and accumulation of p53 protein. While phosphorylation of extracellular signal-regulated protein kinase (ERK) was found in cells treated with NaVO(3), treatment with U0126 did not suppress Ser15 phosphorylation. On the other hand, treatment with wortmannin or caffeine, the inhibitors to phosphatidylinositol 3-kinase related kinases (PIKKs), suppressed both NaVO(3)-induced Ser15 phosphorylation and accumulation of p53 protein. The silencing of ataxia telangiectasia mutated (ATM) expression using short-interference RNA resulted in the marked suppression of Ser15 phosphorylation in A549 cells exposed to NaVO(3). However, treatment with antioxidants such as catalase and N-acetylcysteine did not suppress NaVO(3)-induced Ser15 phosphorylation. Transcriptional activation of p53 and DNA fragmentation in A549 cells treated with NaVO(3) were suppressed only slightly by S15A mutation, suggesting that Ser15 phosphorylation is not essential for these responses. The present results showed that vanadate induces the phosphorylation of p53 at Ser15 depending on ATM, one of the members of PIKK family, in this human pulmonary epithelial cell line.
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Affiliation(s)
- Katsura Suzuki
- Department of Hygiene and Public Health I, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
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421
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Chakraborty T, Chatterjee A, Rana A, Dhachinamoorthi D, Kumar P A, Chatterjee M. Carcinogen-induced early molecular events and its implication in the initiation of chemical hepatocarcinogenesis in rats: Chemopreventive role of vanadium on this process. Biochim Biophys Acta Mol Basis Dis 2007; 1772:48-59. [PMID: 17174075 DOI: 10.1016/j.bbadis.2006.10.019] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2006] [Revised: 09/19/2006] [Accepted: 10/16/2006] [Indexed: 11/24/2022]
Abstract
Carcinogen-induced formation of DNA adducts and other types of DNA lesions are the critical molecular events in the initiation of chemical carcinogenesis and modulation of such events by chemopreventive agents could be an important step in limiting neoplastic transformation in vivo. Vanadium, a dietary micronutrient has been found to be effective in several types of cancers both in vivo and in vitro and also possesses profound anticarcinogenicity against rat models of mammary, colon and hepatocarcinogenesis. Presently, we report the chemopreventive potential of vanadium on diethylnitrosamine (DEN)-induced early DNA damages in rat liver. Hepatocarcinogenesis was induced in male Sprague-Dawley rats with a single, necrogenic, intraperitoneal (i.p.) injection of DEN (200 mg/kg body weight) at week 4. There was a significant induction of tissue-specific ethylguanines, steady elevation of modified DNA bases 8-hydroxy-2'-deoxyguanosines (8-OHdGs) (P<0.0001; 89.93%) along with substantial increment of the extent of single-strand breaks (SSBs) (P<0.0001) following DEN exposure. Supplementation of 0.5 ppm of vanadium throughout the experiment abated the formations of O(6)-ethylguanines and 7-ethylguanines (P<0.0001; 48.71% and 67.54% respectively), 8-OHdGs (P<0.0001; 81.37%), length:width (L:W) of DNA mass (P<0.01; 62.12%) and the mean frequency of tailed DNA (P<0.001; 53.58%), and hepatic nodulogenesis in preneoplastic rat liver. The study indicates that 0.5 ppm vanadium is potentially and optimally effective, as derived from dose-response studies, in limiting early molecular events and preneoplastic lesions, thereby modulating the initiation stage of hepatocarcinogenesis. Vanadium is chemopreventive against DEN-induced genotoxicity and resulting hepatocellular transformation in rats.
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Affiliation(s)
- Tridib Chakraborty
- Division of Biochemistry, Department of Pharmaceutical Technology, Jadavpur University, PO Box 17028, Calcutta-700032, India
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422
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Veschetti E, Maresca D, Lucentini L, Ferretti E, Citti G, Ottaviani M. Monitoring of V(IV) and V(V) in Etnean drinking-water distribution systems by solid phase extraction and electrothermal atomic absorption spectrometry. Microchem J 2007. [DOI: 10.1016/j.microc.2006.05.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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423
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Li Q, Zhao X, Jiang K, Liu G. The study of preconcentration and separation of vanadium(V) using microcrystalline triphenylmethane loaded with crystal violet and the determination of vanadium(V) in water samples by spectrophotometry. Mikrochim Acta 2006. [DOI: 10.1007/s00604-006-0693-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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424
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Ray RS, Rana B, Swami B, Venu V, Chatterjee M. Vanadium mediated apoptosis and cell cycle arrest in MCF7 cell line. Chem Biol Interact 2006; 163:239-47. [PMID: 16970931 DOI: 10.1016/j.cbi.2006.08.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 07/31/2006] [Accepted: 08/07/2006] [Indexed: 11/30/2022]
Abstract
Vanadium is a metal widely distributed in the environment. It is also a dietary micronutrient. It has shown insulin mimetic and chemopreventive properties and has been considered as an important pharmacological agent. In this study, we evaluated the apoptogenic role of vanadium on human breast cancer cell line MCF7. Exposure of MCF7 cells to vanadium led to the induction of apoptosis in a dose-dependent manner. Percentage of apoptosis was maximum (42.5%) at the highest non-toxic dose (250 microM). It was found that vanadium treatment brought about a prominent chromatin condensation, cell cycle arrest leading to apoptosis. These apoptosis based assays demonstrate that vanadium has the potential to be developed into an anti-cancer drug in the near future.
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Affiliation(s)
- Rajarshi Sankar Ray
- Department of Pharmaceutical Technology, Jadavpur University, P.O. Box 17028, Kolkata 700 032, India
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425
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Ahmed Ouameur A, Arakawa H, Tajmir-Riahi HA. Binding of oxovanadium ions to the major and minor grooves of DNA duplex: stability and structural models. Biochem Cell Biol 2006; 84:677-83. [PMID: 17167530 DOI: 10.1139/o06-043] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Vanadate induces DNA strand breaks in cultured human fibroblasts at doses that are relative to the occupational exposure. Oxovanadium compounds also exert preventive effects against chemical carcinogenesis in animals and form complexes with DNA in vivo. This study was designed to examine the interaction of calf-thymus DNA with VO2+and VO3¯ions in aqueous solution at physiological pH, with a constant DNA concentration of 12.5 mmol/L and vanadium–DNA (phosphate) molar ratios (r) of 1:160 to 1:2. Capillary electrophoresis and Fourier transform infrared difference spectroscopy were used to determine the cation binding site, the binding constant, the helix stability, and DNA conformation in the oxovanadium–DNA complexes. Structural analysis showed that VO2+binds DNA through guanine and adenine N-7 atoms and the backbone PO2group with apparent binding constants of KG= 8.8 × 105(mol/L)–1and KA= 3.4 × 105(mol/L)–1. The VO3¯shows weaker binding through thymine, adenine, and guanine bases, with K = 1.9 × 104(mol/L)–1and no interaction with the backbone phosphate group. A partial B-to-A DNA transition occurred upon VO–DNA complexation, while DNA remains in the B-family structure in the VO3¯complexes.
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Affiliation(s)
- A Ahmed Ouameur
- Department of Chemistry-Biology, Université de Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC, G9A 5H7, Canada
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426
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Costa Pessoa J, Marcão S, Correia I, Gonçalves G, Dörnyei A, Kiss T, Jakusch T, Tomaz I, Castro MMCA, Geraldes CFGC, Avecilla F. Vanadium (IV and V) Complexes of Reduced Schiff Bases Derived from the Reaction of Aromatico-Hydroxyaldehydes and Diamines Containing Carboxyl Groups. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600309] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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427
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Sabolić I. Common mechanisms in nephropathy induced by toxic metals. Nephron Clin Pract 2006; 104:p107-14. [PMID: 16940748 DOI: 10.1159/000095539] [Citation(s) in RCA: 128] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Various metals of unknown function in the body (Cd, Cr, Hg, Pb, U), trace elements in excessive concentrations (Co, Cu, Fe, Zn), or metals used in cancer therapy (Pt, V), accumulate in the mammalian kidney, largely in the proximal tubule (PT) cells, and cause functional and structural damage that results in reabsorptive and secretory defects. The intracellular mechanisms of their toxicity in the PT cells are not well known. Recent studies have indicated an oxidative stress with associated lipid peroxidation, apoptosis, and necrosis as common phenomena in the course of nephrotoxicity of these metals. However, a number of other phenomena, such as the selective inhibition and/or loss of various membrane transporters, enhancement of ion conductances, increased cytoplasmic concentration of calcium, deranged cytoskeleton and cell polarity, impaired endocytosis, swelling and fragmentation of mitochondria, increased expression of metallothionein, heat-shock and multidrug resistance proteins, loss of cell membrane integrity, as well as the damage of mitochondrial and genomic DNAs have been fragmentarily demonstrated for the action of some toxic metals, but their importance for the course of nephrotoxicity and the sequence of events in relation to oxidative stress, apoptosis, and necrosis have not been clearly established. Recent studies of metal toxicity in various tissues and cells of non-renal and renal origin enable us to estimate 'causes and consequences' of various phenomena in the metal-induced nephrotoxicity, and to assemble them in a possible common, time-related sequence.
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Affiliation(s)
- Ivan Sabolić
- Unit of Molecular Toxicology, Institute for Medical Research and Occupational Health, Zagreb, Croatia.
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428
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Barrio DA, Etcheverry SB. Vanadium and bone development: putative signaling pathwaysThis paper is one of a selection of papers published in this Special issue, entitled Second Messengers and Phosphoproteins—12th International Conference. Can J Physiol Pharmacol 2006; 84:677-86. [PMID: 16998531 DOI: 10.1139/y06-022] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vanadium is a trace element present in practically all cells in plants and animals. It exerts interesting actions in living systems. At pharmacological doses, vanadium compounds display relevant biological actions such as mimicking insulin and growth factors as well as having osteogenic activity. Some vanadium compounds also show antitumoral properties. The importance of vanadium in bone arises from the studies developed to establish the essentiality of this element in animals and humans. Bone tissue, where the element seems to play an important role, accumulates great amounts of vanadium. This paper reviews the physiology of osteoblasts, the involvement of different growth factors on bone development, and the effects of vanadium derivatives on the skeletal system of animal models and bone-related cells. Two cellular lines are discussed in particular; one derived from a rat osteosarcoma (UMR106) and the other is a nontransformed osteoblast cell line (MC3T3-E1). The effects of different growth factors and their mechanisms of action in these cellular lines are reviewed. These models of osteoblasts are especially useful in understanding the intracellular signaling pathways of vanadium derivatives in hard tissues. Vanadium uses an intricate interplay of intracellular mechanisms to exert different biochemical and pharmacological actions. The effects of vanadium derivatives on some cellular signaling pathways related to insulin are compiled in this review. The comprehension of these intracellular signaling pathways may facilitate the design of vanadium compounds with promising therapeutic applications as well as the understanding of secondary side effects derived from the use of vanadium as a therapeutic agent.
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Affiliation(s)
- D A Barrio
- Cátedra de Bioquímica Patológica, Facultad de Ciencias Exactas, UNLP, 47 y 115 (1900) La Plata, Argentina
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429
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Sutradhar M, Mukherjee G, Drew MGB, Ghosh S. Synthesis, Reactivity, and X-ray Crystal Structure of Some Mixed-Ligand Oxovanadium(V) Complexes: First Report of Binuclear Oxovanadium(V) Complexes Containing 4,4‘-Bipyridine Type Bridge. Inorg Chem 2006; 45:5150-61. [PMID: 16780338 DOI: 10.1021/ic051120g] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of the tridentate ONO Schiff-base ligand 2-hydroxybenzoylhydrazone of 2-hydroxybenzoylhydrazine (H2L) with VO(acac)2 in ethanol medium produces the oxoethoxovanadium(V) complex [VO(OEt)L] (A), which reacts with pyridine to form [VO(OEt)L.(py)] (1). Complex 1 is structurally characterized. It has a distorted octahedral O4N2 coordination environment around the V(V) acceptor center. Both complexes A and 1 in ethanol medium react with neutral monodentate Lewis bases 2-picoline, 3-picoline, 4- picoline, 4-amino pyridine, imidazole, and 4-methyl imidazole, all of which are stronger bases than pyridine, to produce dioxovanadium(V) complexes of general formula BH[VO2L]. Most of these dioxo complexes are structurally characterized, and the complex anion [VO2L]- is found to possess a distorted square pyramidal structure. When a solution/suspension of a BH[VO2L] complex in an alcohol (ROH) is treated with HCl in the same alcohol, it is converted into the corresponding monooxoalkoxo complex [VO(OR)L], where R comes from the alcohol used as the reaction medium. Both complexes A and 1 produce the 4,4'-bipyridine-bridged binuclear complex [VO(OEt)L]2(mu-4,4'-bipy) (2), which, to the best of our knowledge, represents the first report of a structurally characterized 4,4'-bipyridine-bridged oxovanadium(V) binuclear complex. Two similar binuclear oxovanadium(V) complexes 3 and 4 are also synthesized and characterized. All these binuclear complexes (2-4), on treatment with base B, produce the corresponding mononuclear dioxovanadium(V) complexes (5-10).
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Affiliation(s)
- Manas Sutradhar
- Department of Chemistry, University of Calcutta, University College of Science, 92 Acharya Prafulla Chandra Road, Kolkata 700 009, India
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430
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Maurya MR, Kumar A, Abid M, Azam A. Dioxovanadium(V) and μ-oxo bis[oxovanadium(V)] complexes containing thiosemicarbazone based ONS donor set and their antiamoebic activity. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.02.032] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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431
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Hamilton EE, Fanwick PE, Wilker JJ. Alkylation of Inorganic Oxo Compounds and Insights on Preventing DNA Damage. J Am Chem Soc 2006; 128:3388-95. [PMID: 16522120 DOI: 10.1021/ja056568v] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metabolism of food- and tobacco-borne procarcinogens results in the exposure of DNA to toxic alkylating agents. These assaults can bring about DNA alkylation damage, mutations, and cancer. Dietary inorganic compounds such as selenium and vanadium are known to prevent cancer, possibly by reacting directly with alkylating agents, thereby preventing DNA damage. To understand potential interactions between oxo species and alkylating toxins, we reacted a series of alkylating agents with varied classes of oxo compounds (i.e., vanadates, selenate, phosphate, sulfate, acetate, nitrate, and nitrite). A new organic-soluble selenate, [(C6H5)4P]3(O3SeOCH2OSeO3)(HSeO4), was synthesized and characterized for these studies. Vanadates were found to convert ethylating agents into ethanol, whereas other anions formed esters upon alkylation. General trends show that oxo anions of the greatest charge density were the most reactive. These studies suggest that the design of new compounds for cancer prevention should incorporate reactive oxo groups with high anionic charge density.
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Affiliation(s)
- Elizabeth E Hamilton
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, USA
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432
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Valko M, Rhodes CJ, Moncol J, Izakovic M, Mazur M. Free radicals, metals and antioxidants in oxidative stress-induced cancer. Chem Biol Interact 2006; 160:1-40. [PMID: 16430879 DOI: 10.1016/j.cbi.2005.12.009] [Citation(s) in RCA: 3876] [Impact Index Per Article: 215.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Revised: 12/15/2005] [Accepted: 12/20/2005] [Indexed: 02/07/2023]
Abstract
Oxygen-free radicals, more generally known as reactive oxygen species (ROS) along with reactive nitrogen species (RNS) are well recognised for playing a dual role as both deleterious and beneficial species. The "two-faced" character of ROS is substantiated by growing body of evidence that ROS within cells act as secondary messengers in intracellular signalling cascades, which induce and maintain the oncogenic phenotype of cancer cells, however, ROS can also induce cellular senescence and apoptosis and can therefore function as anti-tumourigenic species. The cumulative production of ROS/RNS through either endogenous or exogenous insults is termed oxidative stress and is common for many types of cancer cell that are linked with altered redox regulation of cellular signalling pathways. Oxidative stress induces a cellular redox imbalance which has been found to be present in various cancer cells compared with normal cells; the redox imbalance thus may be related to oncogenic stimulation. DNA mutation is a critical step in carcinogenesis and elevated levels of oxidative DNA lesions (8-OH-G) have been noted in various tumours, strongly implicating such damage in the etiology of cancer. It appears that the DNA damage is predominantly linked with the initiation process. This review examines the evidence for involvement of the oxidative stress in the carcinogenesis process. Attention is focused on structural, chemical and biochemical aspects of free radicals, the endogenous and exogenous sources of their generation, the metal (iron, copper, chromium, cobalt, vanadium, cadmium, arsenic, nickel)-mediated formation of free radicals (e.g. Fenton chemistry), the DNA damage (both mitochondrial and nuclear), the damage to lipids and proteins by free radicals, the phenomenon of oxidative stress, cancer and the redox environment of a cell, the mechanisms of carcinogenesis and the role of signalling cascades by ROS; in particular, ROS activation of AP-1 (activator protein) and NF-kappaB (nuclear factor kappa B) signal transduction pathways, which in turn lead to the transcription of genes involved in cell growth regulatory pathways. The role of enzymatic (superoxide dismutase (Cu, Zn-SOD, Mn-SOD), catalase, glutathione peroxidase) and non-enzymatic antioxidants (Vitamin C, Vitamin E, carotenoids, thiol antioxidants (glutathione, thioredoxin and lipoic acid), flavonoids, selenium and others) in the process of carcinogenesis as well as the antioxidant interactions with various regulatory factors, including Ref-1, NF-kappaB, AP-1 are also reviewed.
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Affiliation(s)
- M Valko
- Faculty of Chemical and Food Technology, Slovak Technical University, SK-812 37 Bratislava, Slovakia.
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433
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Ivanković S, Musić S, Gotić M, Ljubesić N. Cytotoxicity of nanosize V(2)O(5) particles to selected fibroblast and tumor cells. Toxicol In Vitro 2005; 20:286-94. [PMID: 16182506 DOI: 10.1016/j.tiv.2005.08.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2005] [Revised: 06/24/2005] [Accepted: 08/03/2005] [Indexed: 11/25/2022]
Abstract
Two kinds of nanosize V(2)O(5) particles were synthesized in our own laboratory and concomitantly applied to V79 and L929 fibroblasts and SCCVII, B16F10 and FsaR tumor cells. The morphologies of the cells were monitored using an inverted inverse microscope equipped with digital camera, while quantitative determination of the cytotoxicity of nanosize V(2)O(5) particles was measured using crystal violet bioassay. Twenty four hours after the addition of nanosize V(2)O(5) particles (20muM), noticeable changes in the morphology and density of fibroblast and cancer cells were observed. Reculturing in a freshly prepared medium for the next 24h showed a high recovery effect on V79, SCCVII and B16F10 cells, while FsaR and L929 cells were seriously damaged and unable to recover. At a higher concentration of nanosize V(2)O(5) particles (100muM), the cytotoxicity of V(2)O(5) prevailed against the recovery effect in all cell types. Quantitative measurements have shown that the resistance of investigated cell cultures to the cytotoxicity of nanosize V(2)O(5) particles decreases in the order V79>SCCVII>B16F10>FsaR>L929. The high cytotoxic effect found on FsaR cells suggests that nanosize V(2)O(5) particles could be regarded as poisoning material in the treatment of FsaR fibrosarcoma cells. Possible mechanisms involved in the cytotoxicity of nanosize V(2)O(5) particles were discussed.
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Affiliation(s)
- Sinisa Ivanković
- Division of Molecular Medicine, Ruder Bosković Institute, Bijenicka c 54, P.O. Box 180, HR-10002 Zagreb, Croatia
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434
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Chakraborty T, Samanta S, Ghosh B, Thirumoorthy N, Chatterjee M. Vanadium induces apoptosis and modulates the expressions of metallothionein, Ki-67 nuclear antigen, and p53 during 2-acetylaminofluorene-induced rat liver preneoplasia. J Cell Biochem 2005; 94:744-62. [PMID: 15565650 DOI: 10.1002/jcb.20304] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Our previous studies have shown that vanadium, a dietary micronutrient, has an inhibitory effect against experimentally induced rat hepatocarcinogenesis. In this study, we evaluated the role of vanadium on some potential protein expression markers of carcinogenesis, such as metallothionein (MT), an intracellular metal-binding protein linked with cell proliferation and apoptosis, Ki-67 nuclear antigen, and p53 tumor suppressor during 2-acetylaminofluorene (2-AAF)-induced (0.05% in basal diet) rat liver preneoplasia. In a short-term regimen, supplementation of vanadium at a dose of 0.5 ppm effectively suppressed the formation of DNA 'comets' (29.55%; P < 0.02), thereby indicating its nongenotoxicity at this particular dose. Vanadium administration throughout the study reduced relative liver weight (RLW), nodular incidence (57.15%), total number, and multiplicity (48.45%) with restoration of hepatic zinc (Zn), magnesium (Mg), selenium (Se), copper (Cu), iron (Fe), and calcium (Ca) contents when compared to the carcinogen control. Moreover, treatment with vanadium significantly abated the expressions of MT and Ki-67, studied at four sequential time points. An increased immunopositivity of p53 protein (1.03 +/- 0.23%; P < 0.02) was found in vanadium-treated rat liver with an elevated apoptotic-labeling index (AI; P < 0.001) as documented by TUNEL assay. Furthermore, a positive correlation between MT expression and Ki-67 labeling along with a strong negative correlation between MT immunoreactivity and AI (r = -0.9000, P = 0.0004 at week 24) at various time intervals suggest that, vanadium-mediated suppression of MT and Ki-67 expressions may be associated with induction of apoptosis. The results thus provide evidence for the first time in support of the potential role of vanadium on induction of p53 and apoptosis with concurrent suppression of MT and Ki-67 in order to have an understanding, in part, of the chemopreventive mechanism of this trace element in limiting neoplastic transformation in a defined model of experimental rat hepatocarcinogenesis.
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Affiliation(s)
- Tridib Chakraborty
- Department of Pharmaceutical Technology, Division of Biochemistry, Jadavpur University, PO Box 17028, Calcutta 700032, India
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435
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Leopardi P, Villani P, Cordelli E, Siniscalchi E, Veschetti E, Crebelli R. Assessment of the in vivo genotoxicity of vanadate: Analysis of micronuclei and DNA damage induced in mice by oral exposure. Toxicol Lett 2005; 158:39-49. [PMID: 15993742 DOI: 10.1016/j.toxlet.2005.02.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2005] [Revised: 02/25/2005] [Accepted: 02/25/2005] [Indexed: 11/28/2022]
Abstract
Vanadium compounds are able to interact with living cells exerting a variety of biological effects. The pentavalent form is the most stable and toxic form of the element. In systems in vitro pentavalent vanadium is an effective genotoxic agent, inducing DNA damage and chromosome malsegregation at low doses. On the other hand, no adequate in vivo data are available for the characterization of the genotoxic hazard following oral intake, the most relevant route of human exposure. In this study, the genotoxic effects produced by the oral intake of sodium ortho-vanadate (Na(3)VO(4)) were investigated. Male CD-1 mice were treated for 5 weeks with a range of concentrations of Na(3)VO(4) in drinking water (0.75-1500 mg/l). Both micronuclei and primary DNA lesions as detected by comet assay were assessed in several tissues. Statistically significant increases of micronuclei in bone marrow were observed in mice receiving the two highest concentrations of Na(3)VO(4) (750 and 1500 mg/l). A significant increase of comet tail length was observed in splenocytes of mice receiving Na(3)VO(4) at 1500 mg/l, whereas no effect was observed in bone marrow and testis cells. No treatment-related effect on sperm chromatin structure or on testis cell population was observed. The determination of vanadium content in mouse tissues at the end of treatment highlighted a very low internal exposure, especially in soft tissues. Overall, the results obtained indicate that the genotoxic activity of pentavalent vanadium is expressed in vivo only following high dose exposure, possibly as a consequence of the poor bioavailability of the element.
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Affiliation(s)
- Paola Leopardi
- Genetic Toxicology Unit, Department of Environment and Primary Prevention, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy
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436
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Molinuevo MS, Etcheverry SB, Cortizo AM. Macrophage activation by a vanadyl–aspirin complex is dependent on L-type calcium channel and the generation of nitric oxide. Toxicology 2005; 210:205-12. [PMID: 15840434 DOI: 10.1016/j.tox.2005.02.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Revised: 02/02/2005] [Accepted: 02/05/2005] [Indexed: 11/28/2022]
Abstract
Bone homeostasis is the result of a tight balance between bone resorption and bone formation where macrophage activation is believed to contribute to bone resorption. We have previously shown that a vanadyl(IV)-aspirin complex (VOAspi) regulates cell proliferation and differentiation of osteoblasts in culture. In this study, we assessed VOAspi and VO effects and their possible mechanism of action on a mouse macrophage cell line RAW 264.7. Both vanadium compounds inhibited cell proliferation in a dose-dependent manner. Nifedipine completely reversed the VOAspi-induced macrophage cytotoxicity, while it could not block the effect of VO. VOAspi also stimulated nitric oxide (NO) production, the oxidation of dihydrorhodamine 123 (DHR-123) and enhanced the expression of both constitutive and inducible isoforms of nitric oxide syntases (NOS). All these effects were abolished by nifedipine. Altogether our finding give evidence that VOAspi-induced macrophage cytotoxicity is dependent on L-type calcium channel and the generation of NO though the induction of eNOS and iNOS. Contrary, the parent compound VO exerted a cytotoxic effect by mechanisms independent of a calcium entry and the NO/NOS activation.
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Affiliation(s)
- María Silvina Molinuevo
- Cátedra de Bioquímica Patológica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Departamento de Ciencias Biologicas, 47 y 115, 1900 La Plata, Buenos Aires, Argentina
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437
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Gândara RMC, Soares SS, Martins H, Gutiérrez-Merino C, Aureliano M. Vanadate oligomers: in vivo effects in hepatic vanadium accumulation and stress markers. J Inorg Biochem 2005; 99:1238-44. [PMID: 15833347 DOI: 10.1016/j.jinorgbio.2005.02.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2005] [Revised: 02/15/2005] [Accepted: 02/23/2005] [Indexed: 02/07/2023]
Abstract
The formation of vanadate oligomeric species is often disregarded in studies on vanadate effects in biological systems, particularly in vivo, even though they may interact with high affinity with many proteins. We report the effects in fish hepatic tissue of an acute intravenous exposure (12, 24 h and 7 days) to two vanadium(V) solutions, metavanadate and decavanadate, containing different vanadate oligomers administered at sub-lethal concentration (5 mM; 1 mg/kg). Decavanadate solution promotes a 5-fold increase (0.135 +/- 0.053 microg V(-1) dry tissues) in the vanadium content of the mitochondrial fraction 7 days after exposition, whereas no effects were observed after metavanadate solution administration. Reduced glutathione (GSH) levels did not change and the overall reactive oxygen species (ROS) production was decreased by 30% 24 h after decavanadate administration, while for metavanadate, GSH levels increased 35%, the overall ROS production was depressed by 40% and mitochondrial superoxide anion production decreased 45%. Decavanadate intoxication did not induce changes in the rate of lipid peroxidation till 12 h, but later increased 80%, which is similar to the increase observed for metavanadate after 24 h. Decameric vanadate administration clearly induces different effects than the other vanadate oligomeric species, pointing out the importance of taking into account the different vanadate oligomers in the evaluation of vanadium(V) effects in biological systems.
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Affiliation(s)
- R M C Gândara
- CBME, Department Química e Bioquímica, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
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438
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Yamazaki RK, Hirabara SM, Tchaikovski OJ, Lopes MCP, Nogata C, Aikawa J, Nunes EA, Tanhoffer RA, Lissa MD, Fernandes LC. The effects of peroxovanadate and peroxovanadyl on glucose metabolism in vivo and identification of signal transduction proteins involved in the mechanism of action in isolated soleus muscle. Mol Cell Biochem 2005; 273:145-50. [PMID: 16013449 DOI: 10.1007/s11010-005-8265-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The insulin-like effects of peroxovanate (POV) and peroxovanadyl (PSV) on rates of lactate formation and glycogen synthesis were measured in isolated incubated soleus muscle preparations. In another experiment rats were made insulin deficient by streptozotocin injection and treated with POV and PSV (0.25 mM) administered in the drinking water and in the course of 7 days glycemia were determined. Also, signal transduction proteins ERK 1 and ERK 2 involved in the insulin signaling were measured in soleus muscle of diabetic rats treated with POV and PSV. Peroxides of vanadate and vanadyl significantly stimulated glucose utilization in soleus muscle preparations in vitro. The stimulation of glycogen synthesis and lactate formation by POV and PSV was similar to insulin stimuli. Rats treated with POV or PSV presented reduction of glycemia, food and fluid intake with amelioration of the diabetic state during the short period of treatment (7 days). POV and PSV modulated ERK1/2 phosphorilation and the insulin administration in these rats caused an addictive effect on phosphorilation state of these proteins.
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Affiliation(s)
- Ricado Key Yamazaki
- Departamento de Fisiologia, Setor de Ciências Biológicas, Universidade Federal do Paraná, Brasil
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439
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Huang R, Wallqvist A, Covell DG. Anticancer metal compounds in NCI's tumor-screening database: putative mode of action. Biochem Pharmacol 2005; 69:1009-39. [PMID: 15763539 DOI: 10.1016/j.bcp.2005.01.001] [Citation(s) in RCA: 130] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2004] [Accepted: 01/03/2005] [Indexed: 12/12/2022]
Abstract
Clustering analysis of tumor cell cytotoxicity profiles for the National Cancer Institute (NCI)'s open compound repository has been used to catalog over 1100 metal or metalloid containing compounds with potential anticancer activity. The molecular features and corresponding reactivity of these compounds have been analyzed in terms of properties of their metals, their associated organic components (ligands) and their capacity to inhibit tumor cell growth. Cytotoxic responses are influenced by both the identity of the metal and the properties of its coordination ligand, with clear associations between structural similarities and cytotoxicity. Assignments of mechanisms of action (MOAs) for these compounds could be segregated into four broad response classes according to preference for binding to biological sulfhydryl groups, chelation, generation of reactive oxygen species (ROS), and production of lipophilic ions. Correlations between specific cytotoxic responses and differential gene expression profiles within the NCI's tumor cell panel serve as a validation for candidate biological targets and putative MOA classes. In addition, specific sensitivity toward subsets of metal containing agents has been found for certain tumor cell panels. Taken together, our results expand the knowledge base available for evaluating, designing and developing new metal-based anticancer drugs that may provide the basis for target-specific therapeutics.
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Affiliation(s)
- Ruili Huang
- National Cancer Institute at Frederick, Developmental Therapeutics Program, Screening Technologies Branch, Laboratory of Computational Technologies, Frederick, MD 21702, USA
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440
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Preparation and characterisation of oxovanadium(IV) complexes derived from 2,6-diformyl-4-methylphenol and l-His and l-Ala. Spectroscopic study of the system VIVO2++BDF–His. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.11.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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441
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Correia I, Pessoa JC, Duarte MT, da Piedade MFM, Jackush T, Kiss T, Castro MMCA, Geraldes CFGC, Avecilla F. Vanadium(IV andV) Complexes of Schiff Bases and Reduced Schiff Bases Derived from the Reaction of Aromatico-Hydroxyaldehydes and Diamines: Synthesis, Characterisation and Solution Studies. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400481] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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442
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Sankar Ray R, Roy S, Ghosh S, Kumar M, Chatterjee M. Suppression of cell proliferation, DNA protein cross-links, and induction of apoptosis by vanadium in chemical rat mammary carcinogenesis. Biochim Biophys Acta Gen Subj 2005; 1675:165-73. [PMID: 15535980 DOI: 10.1016/j.bbagen.2004.09.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2004] [Revised: 08/18/2004] [Accepted: 09/08/2004] [Indexed: 11/22/2022]
Abstract
Vanadium, a dietary micronutrient, has recently been considered as an important pharmacological agent. The present investigation was carried out to ascertain its anticarcinogenic potential against an experimental rat mammary carcinogenesis. Female Sprague-Dawley rats were treated with 7,12dimethylbenz(alpha)anthracene (DMBA) (0.5 mg/100 g body weight) by a single tail vein injection in an oil emulsion. Vanadium (ammonium monovanadate) at a concentration of 0.5 ppm (4.27 micromol/L) was supplemented in drinking water and given ad libitum to the experimental group. The present study was an attempt to assess the effect of vanadium (ammonium monovanadate) on cell proliferation, apoptosis and histopathology in the mammary tissue. We also have examined DNA fragmentation and DNA protein cross-links (DPC) in the liver of rats as well. Immunohistochemical analysis indicated that early neoplasia in mammary tissue proceeds by a decrease in apoptotic cell death (ACD), which was also examined with TUNEL assay, rather than an increase in cell proliferation (P<0.01). DPC in liver were reduced by vanadium treatment (ANOVA, F=13.7, P<0.01). Agarose gel electrophoresis revealed DNA fragmentation in the vanadium-treated group, confirming apoptosis further. Results of the study indicate that the mammary preneoplasia is sensitive to vanadium intervention whereas normal proliferating cells are not.
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Affiliation(s)
- Rajarshi Sankar Ray
- PO Box No. 17028, Division of Biochemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata-700032, India
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443
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Sam M, Hwang JH, Chanfreau G, Abu-Omar MM. Hydroxyl Radical is the Active Species in Photochemical DNA Strand Scission by Bis(peroxo)vanadium(V) Phenanthroline. Inorg Chem 2004; 43:8447-55. [PMID: 15606193 DOI: 10.1021/ic0486419] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bis(peroxo)vanadium(V) complexes are widely investigated as anticancer agents. They exert their antitumor and cyctotoxic effects through inhibition of tyrosine phosphatases and DNA cleavage, respectively. The latter process remains poorly understood. The mechanism of DNA cleavage by NH(4)[(phen)V(O)(eta(2)-O(2))(2)] (phen = 1,10-phenanthroline) was investigated. Kinetic studies on DNA cleavage revealed that the complex is a single-strand nicking agent with no specificity. EPR experiments using 2,2,6,6-tetramethyl-4-piperidone (TMP) and 5,5'-dimethyl-1-pyrroline-N-oxide (DMPO) as spin-traps for singlet oxygen and hydroxyl radical, respectively, implicated hydroxyl radical production upon photodecomposition of bis(peroxo)vanadium(V). This was corroborated by benzoate inhibition of DNA strand scission and stoichiometric oxidation of 2-propanol to acetone upon irradiation of bis(peroxo)vanadium(V) phenanthroline. High-resolution polyacrylamide gel analysis of the vanadium cleavage reaction and [Fe(II)EDTA](2)(-)/H(2)O(2) resulted in comigration of "ladder" pattern bands, which superimposed when both reactions were run on the same lane. These findings identify hydroxyl radical produced from the photooxidation of the peroxo ligand on vanadium as the active species in DNA cleavage.
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Affiliation(s)
- Mui Sam
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
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444
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A fresh look into VO(salen) chemistry: synthesis, spectroscopy, electrochemistry and crystal structure of [VO(salen)(H2O)]Br·0.5 CH3CN. Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2004.06.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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445
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Hamilton EE, Wilker JJ. Inhibition of DNA alkylation damage with inorganic salts. J Biol Inorg Chem 2004; 9:894-902. [PMID: 15378408 DOI: 10.1007/s00775-004-0597-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Accepted: 08/27/2004] [Indexed: 10/26/2022]
Abstract
Human exposure to alkylating agents metabolized from tobacco- and food-borne carcinogens occurs regularly. Dietary inorganic compounds such as selenium and vanadium have been shown previously to provide chemoprotective benefits in rat and human trials. Here, we present biochemical data on the ability of inorganic compounds to protect DNA from alkylation damage. An enzyme cleavage assay is used to observe alkylated DNA. Simple salts (e.g., NaCl or NiCl(2)) did not prevent DNA alkylation, whereas anionic oxo species (e.g., Na(2)SeO(4) or Na(3)VO(4)) did inhibit alkylation. We propose that these oxo species behave as nucleophilic targets for the electrophilic alkylating agents, thereby preventing DNA damage.
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Affiliation(s)
- Elizabeth E Hamilton
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA
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446
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Crans DC, Smee JJ, Gaidamauskas E, Yang L. The chemistry and biochemistry of vanadium and the biological activities exerted by vanadium compounds. Chem Rev 2004; 104:849-902. [PMID: 14871144 DOI: 10.1021/cr020607t] [Citation(s) in RCA: 982] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA.
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447
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Papaioannou A, Manos M, Karkabounas S, Liasko R, Evangelou AM, Correia I, Kalfakakou V, Pessoa JC, Kabanos T. Solid state and solution studies of a vanadium(III)-l-cysteine compound and demonstration of its antimetastatic, antioxidant and inhibition of neutral endopeptidase activities. J Inorg Biochem 2004; 98:959-68. [PMID: 15149802 DOI: 10.1016/j.jinorgbio.2004.02.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2003] [Revised: 02/17/2004] [Accepted: 02/18/2004] [Indexed: 10/26/2022]
Abstract
Reaction of one equivalent of vanadium(III) chloride with three equivalents of l-cysteine(H2Cys) in methyl alcohol affords a VIII-Cys compound that is formulated as [VIII(Hcys)3].2HCl.2.5H2O 1. The solid state characterization of 1 was performed by microanalysis, circular dichroism (CD) and infrared studies as well as room temperature magnetic susceptibility. These studies have shown coordination of each HCys- ligand to the VIII atom through an amine nitrogen and a carboxylate oxygen atoms. Solution studies of 1 were carried out in water and methanol by UV-visible, CD and electron paramagnetic resonance (EPR) spectroscopies. According to these studies, it was evident that despite the progressive oxidation of 1 to oxovanadium(IV) species, some V(III) species were also present in solution after several hours. Compound 1, VIVOSO4.5H2O and l-cysteine were examined for their total antioxidant capacity (TAC) and lag time. Compound 1 exhibited significantly greater total antioxidant capacity and lag time values than l-cysteine. VIVOSO4.5H2O did not show any total antioxidant capacity or lag time. The inhibition of neutral endopeptidase (NEP) activity caused by 1, VIVOSO4.5H2O and thiorphan was also measured. Compound 1, at a concentration of 10(-3) M, showed inhibition of NEP activity as potent as thiorphan at 10(-6) M, while VIVOSO4.5H2O in the same concentration exhibited less than 50% inhibitory activity than that of thiorphan at 10(-6) M. Moreover, the antimetastatic effects of compound 1, l-cysteine and VIVOSO4.5H2O were examined on Wistar rats, treated with 3,4-benzopyrene. The results revealed that 1 prevents significantly lung metastases (only 9.5% of animals treated with 1 showed metastases), whereas 47-52% of the rats of the control group and those treated with l-cysteine and VIVOSO4.5H2O exhibited metastases.
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Affiliation(s)
- Angelos Papaioannou
- Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 45110 Ioannina, Greece
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448
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Preparation and characterisation of vanadium complexes derived from salicylaldehyde or pyridoxal and sugar derivatives. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00395-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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449
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450
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Costa Pessoa J, Correia I, Kiss T, Jakusch T, Castro MMCA, Geraldes CFGC. Oxovanadium(iv and v) and copper(ii) complexes of N-salicyl-glycylglycine and N-salicyl-glycylglycylglycine. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b206835b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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