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Stojanović M, Čolović MB, Lalatović J, Milosavljević A, Savić ND, Declerck K, Radosavljević B, Ćetković M, Kravić-Stevović T, Parac-Vogt TN, Krstić D. Monolacunary Wells-Dawson Polyoxometalate as a Novel Contrast Agent for Computed Tomography: A Comprehensive Study on In Vivo Toxicity and Biodistribution. Int J Mol Sci 2024; 25:2569. [PMID: 38473818 DOI: 10.3390/ijms25052569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/12/2024] [Accepted: 02/14/2024] [Indexed: 03/14/2024] Open
Abstract
Polyoxotungstate nanoclusters have recently emerged as promising contrast agents for computed tomography (CT). In order to evaluate their clinical potential, in this study, we evaluated the in vitro CT imaging properties, potential toxic effects in vivo, and tissue distribution of monolacunary Wells-Dawson polyoxometalate, α2-K10P2W17O61.20H2O (mono-WD POM). Mono-WD POM showed superior X-ray attenuation compared to other tungsten-containing nanoclusters (its parent WD-POM and Keggin POM) and the standard iodine-based contrast agent (iohexol). The calculated X-ray attenuation linear slope for mono-WD POM was significantly higher compared to parent WD-POM, Keggin POM, and iohexol (5.97 ± 0.14 vs. 4.84 ± 0.05, 4.55 ± 0.16, and 4.30 ± 0.09, respectively). Acute oral (maximum-administered dose (MAD) = 960 mg/kg) and intravenous administration (1/10, 1/5, and 1/3 MAD) of mono-WD POM did not induce unexpected changes in rats' general habits or mortality. Results of blood gas analysis, CO-oximetry status, and the levels of electrolytes, glucose, lactate, creatinine, and BUN demonstrated a dose-dependent tendency 14 days after intravenous administration of mono-WD POM. The most significant differences compared to the control were observed for 1/3 MAD, being approximately seventy times higher than the typically used dose (0.015 mmol W/kg) of tungsten-based contrast agents. The highest tungsten deposition was found in the kidney (1/3 MAD-0.67 ± 0.12; 1/5 MAD-0.59 ± 0.07; 1/10 MAD-0.54 ± 0.05), which corresponded to detected morphological irregularities, electrolyte imbalance, and increased BUN levels.
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Affiliation(s)
- Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Mirjana B Čolović
- "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11351 Belgrade, Serbia
| | - Jovana Lalatović
- Department of Radiology, University Hospital Medical Center Bežanijska Kosa, 11080 Belgrade, Serbia
| | - Aleksandra Milosavljević
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Nada D Savić
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Kilian Declerck
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Branimir Radosavljević
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Mila Ćetković
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Tamara Kravić-Stevović
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | | | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
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Stojanović M, Lalatović J, Milosavljević A, Savić N, Simms C, Radosavljević B, Ćetković M, Kravić Stevović T, Mrda D, Čolović MB, Parac-Vogt TN, Krstić D. In vivo toxicity evaluation of a polyoxotungstate nanocluster as a promising contrast agent for computed tomography. Sci Rep 2023; 13:9140. [PMID: 37277558 DOI: 10.1038/s41598-023-36317-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/01/2023] [Indexed: 06/07/2023] Open
Abstract
In this study, we demonstrate for the first time, that a discrete metal-oxo cluster α-/β-K6P2W18O62 (WD-POM) exhibits superior performance as a computed tomography (CT) contrast agent, in comparison to the standard contrast agent iohexol. A toxicity evaluation of WD-POM was performed according to standard toxicological protocols using Wistar albino rats. The maximum tolerable dose (MTD) of 2000 mg/kg was initially determined after oral WD-POM application. The acute intravenous toxicity of single WD-POM doses (1/3, 1/5, and 1/10 MTD), which are at least fifty times higher than the typically used dose (0.015 mmol W kg-1) of tungsten-based contrast agents, was evaluated for 14 days. The results of arterial blood gas analysis, CO-oximetry status, electrolyte and lactate levels for 1/10 MTD group (80% survival rate) indicated the mixed respiratory and metabolic acidosis. The highest deposition of WD-POM (0.6 ppm tungsten) was found in the kidney, followed by liver (0.15 ppm tungsten), for which the histological analysis revealed morphological irregularities, although the renal function parameters (creatinine and BUN levels) were within the physiological range. This study is the first and important step in evaluating side effects of polyoxometalate nanoclusters, which in recent years have shown a large potential as therapeutics and contrast agents.
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Affiliation(s)
- Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Jovana Lalatović
- Department of Radiology, University Hospital Medical Center Bežanijska Kosa, Belgrade, Serbia
| | - Aleksandra Milosavljević
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Nada Savić
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Charlotte Simms
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Branimir Radosavljević
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Mila Ćetković
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Tamara Kravić Stevović
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Davor Mrda
- Department of Radiology, University Hospital Medical Center Bežanijska Kosa, Belgrade, Serbia
| | - Mirjana B Čolović
- "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.
| | - Tatjana N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
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Ferrari P, Becker F, Campani L, Jansen J, Jovanović Z, Krstić D, Mariotti F, Teles P, Venturi G. ON THE PLACEMENT OF APRON DOSEMETERS AND DOSE ASSESSMENT IN INTERVENTIONAL CARDIOLOGY PROCEDURES: PRELIMINARY RESULTS. Radiat Prot Dosimetry 2022; 198:1495-1499. [PMID: 36156106 DOI: 10.1093/rpd/ncac188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Personnel involved in interventional practices are likely to be exposed to higher radiation doses than other workers in the medical field. Personnel monitoring and radiation protection measures play a crucial role in keeping these doses below the limits. EURADOS (European Radiation Dosimetry Group) Working Group 12 performed a series of investigations showing how the complexity of the scattered field reaching the operators can influence the doses to the operators. The present work was aimed at determining the possible effects on the registered doses of the scattered field and the actual position of a dosemeter on apron. This study has been performed through Monte Carlo simulations and it was validated through measurements. It does not claim to identify the 'best' position for the dosemeter, but to assess the variability of its response, showing how a variability of the order of +/- 30% to 40 should be taken into account.
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Affiliation(s)
- P Ferrari
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - F Becker
- KIT, Institute for Nuclear Waste Disposal, Eggenstein-Leopoldshafen, Germany
| | - L Campani
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - J Jansen
- UKHSA, Radiation, Chemical and Environmental Hazards, Chilton, UK
| | - Z Jovanović
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - D Krstić
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - F Mariotti
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - P Teles
- Faculty of Science, Physics and Astronomy Department, Universidade do Porto, Porto, Portugal
| | - G Venturi
- Medical Physics Department, Ravenna & Forlì Hospitals AUSL Romagna, Forlì (FC), Italy
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Đukić L, Trajković L, Knežević T, Dimitrijević J, Krstić D, Stojanović M. The Effect of α-lipoic Acid on C-Reactive Protein Level: A Meta-analysis of Randomized, Double-Blind, and Placebo-Controlled Studies. Dose Response 2022; 20:15593258221126827. [PMID: 36262716 PMCID: PMC9575455 DOI: 10.1177/15593258221126827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The C-reactive protein is generally considered a marker of inflammation, and it is widely used in clinical practice as a minimally invasive index of any ongoing inflammatory response. Alpha-lipoic acid (ALA) supplementation can be beneficial for human health, especially in the sense of its anti-inflammatory action. The aim of this meta-analysis was to, based on the currently available highest level of evidence (prospective, randomized, double-blind, and placebo-controlled data), investigate the effect of ALA supplementation on CRP levels. Prospective, randomized, double-blind, and placebo-controlled clinical trials were extracted after a systematic search of PubMed, the Cochrane Library, the Web of Science, EMBASE, and the Scopus databases. A random effect model was used in this meta-analysis to investigate the influence of ALA on the blood CRP level. The subgroup analysis and meta-regression were used to identify the source of heterogeneity. This meta-analysis provided evidence of the positive effect of ALA on the reduction of the blood CRP level. The subgroup analysis and meta-regression results indicated that ALA can reduce the CRP level when administrated at a 600 mg dose, and not in higher or lower doses. Also, a shorter duration of study positively correlates with the reduction of CRP after ALA supplementation.
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Affiliation(s)
- Ljiljana Đukić
- School of Dental Medicine,
Department of Pharmacology in Dentistry, University of
Belgrade, Belgrade, Serbia
| | - Lazar Trajković
- Faculty of Medicine,
University of
Belgrade, Belgrade, Serbia
| | - Tamara Knežević
- Department of Gastroenterology,
University
Hospital Zvezdara, Belgrade,
Serbia
| | | | - Danijela Krstić
- Faculty of Medicine, Institute of
Medical Chemistry, University of Belgrade, Belgrade,
Serbia
| | - Marko Stojanović
- Faculty of Medicine, Department of
Pharmacology, University of Belgrade, Clinical
Pharmacology and Toxicology, Belgrade, Serbia,Marko Stojanović, Department of
Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine,
University of Belgrade, Dr Subotica 1, Belgrade 11129, Serbiatel.
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Manić V, Manić G, Nikezić D, Krstić D. EFFECT OF BUILDUP FACTORS ON INDOOR GAMMA DOSE RATE. Radiat Prot Dosimetry 2020; 190:132-138. [PMID: 32626894 DOI: 10.1093/rpd/ncaa089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/21/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
The effect of buildup factors on absorbed dose rate in air and the effective dose from gamma rays of primordial radionuclides in building materials, was investigated in the article. Specific absorbed dose rates were calculated for the standard concrete room, as well as, for rooms where brick and covering building materials were used. For all room models the Harima (G-P) buildup factors were applied, while for the standard room the Berger's and Taylor's buildup factors were used, too. The contribution of the radiation buildup to absorbed dose rate and effective dose was determined as large as 41%.
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Affiliation(s)
- V Manić
- Department of Physics, University of Niš, PO Box 224, 18000 Niš, Serbia
| | - G Manić
- Institute of Occupational Health, Department for Radiological Protection, Vojislava Ilića bb, 18000 Niš, Serbia
| | - D Nikezić
- Faculty of Science, Department of Physics, University of Kragujevac, 12 R. Domanovića Str., 34000 Kragujevac, Serbia
- State University of Novi Pazar, Serbia
| | - D Krstić
- Faculty of Science, Department of Physics, University of Kragujevac, 12 R. Domanovića Str., 34000 Kragujevac, Serbia
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Van Gool A, Corrales F, Čolović M, Krstić D, Oliver-Martos B, Martínez-Cáceres E, Jakasa I, Gajski G, Brun V, Kyriacou K, Burzynska-Pedziwiatr I, Wozniak LA, Nierkens S, Pascual García C, Katrlik J, Bojic-Trbojevic Z, Vacek J, Llorente A, Antohe F, Suica V, Suarez G, t'Kindt R, Martin P, Penque D, Martins IL, Bodoki E, Iacob BC, Aydindogan E, Timur S, Allinson J, Sutton C, Luider T, Wittfooth S, Sammar M. Analytical techniques for multiplex analysis of protein biomarkers. Expert Rev Proteomics 2020; 17:257-273. [PMID: 32427033 DOI: 10.1080/14789450.2020.1763174] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The importance of biomarkers for pharmaceutical drug development and clinical diagnostics is more significant than ever in the current shift toward personalized medicine. Biomarkers have taken a central position either as companion markers to support drug development and patient selection, or as indicators aiming to detect the earliest perturbations indicative of disease, minimizing therapeutic intervention or even enabling disease reversal. Protein biomarkers are of particular interest given their central role in biochemical pathways. Hence, capabilities to analyze multiple protein biomarkers in one assay are highly interesting for biomedical research. AREAS COVERED We here review multiple methods that are suitable for robust, high throughput, standardized, and affordable analysis of protein biomarkers in a multiplex format. We describe innovative developments in immunoassays, the vanguard of methods in clinical laboratories, and mass spectrometry, increasingly implemented for protein biomarker analysis. Moreover, emerging techniques are discussed with potentially improved protein capture, separation, and detection that will further boost multiplex analyses. EXPERT COMMENTARY The development of clinically applied multiplex protein biomarker assays is essential as multi-protein signatures provide more comprehensive information about biological systems than single biomarkers, leading to improved insights in mechanisms of disease, diagnostics, and the effect of personalized medicine.
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Affiliation(s)
- Alain Van Gool
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute of Molecular Life Sciences, Radboud University Medical Center , Nijmegen, The Netherlands
| | - Fernado Corrales
- Functional Proteomics Laboratory, Centro Nacional De Biotecnología , Madrid, Spain
| | - Mirjana Čolović
- Department of Physical Chemistry, "Vinča" Institute of Nuclear Sciences, University of Belgrade , Belgrade, Serbia
| | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade , Belgrade, Serbia
| | - Begona Oliver-Martos
- Neuroimmunology and Neuroinflammation Group. Instituto De Investigación Biomédica De Málaga-IBIMA. UGC Neurociencias, Hospital Regional Universitario De Málaga , Malaga, Spain
| | - Eva Martínez-Cáceres
- Immunology Division, LCMN, Germans Trias I Pujol University Hospital and Research Institute, Campus Can Ruti, Badalona, and Department of Cellular Biology, Physiology and Immunology, Universitat Autònoma De Barcelona , Cerdanyola Del Vallès, Spain
| | - Ivone Jakasa
- Laboratory for Analytical Chemistry, Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb , Zagreb, Croatia
| | - Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health , Zagreb, Croatia
| | - Virginie Brun
- Université Grenoble Alpes, CEA, Inserm, IRIG, BGE , Grenoble, France
| | - Kyriacos Kyriacou
- Department of Electron Microscopy/Molecular Biology, The Cyprus School of Molecular Medicine/The Cyprus Institute of Neurology and Genetics , Nicosia, Cyprus
| | - Izabela Burzynska-Pedziwiatr
- Medical Faculty, Department of Biomedical Sciences, Chair of Medical Biology & Department of Structural Biology, Medical University of Lodz , Łódź, Poland
| | - Lucyna Alicja Wozniak
- Medical Faculty, Department of Biomedical Sciences, Chair of Medical Biology & Department of Structural Biology, Medical University of Lodz , Łódź, Poland
| | - Stephan Nierkens
- Center for Translational Immunology, University Medical Center Utrecht & Princess Máxima Center for Pediatric Oncology , Utrecht, The Netherlands
| | - César Pascual García
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology (LIST) , Belvaux, Luxembourg
| | - Jaroslav Katrlik
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences , Bratislava, Slovakia
| | - Zanka Bojic-Trbojevic
- Laboratory for Biology of Reproduction, Institute for the Application of Nuclear Energy - INEP, University of Belgrade , Belgrade, Serbia
| | - Jan Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University , Olomouc, Czech Republic
| | - Alicia Llorente
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital , Oslo, Norway
| | - Felicia Antohe
- Proteomics Department, Institute of Cellular Biology and Pathology "N. Simionescu" of the Romanian Academy , Bucharest, Romania
| | - Viorel Suica
- Proteomics Department, Institute of Cellular Biology and Pathology "N. Simionescu" of the Romanian Academy , Bucharest, Romania
| | - Guillaume Suarez
- Center for Primary Care and Public Health (Unisanté), University of Lausanne , Lausanne, Switzerland
| | - Ruben t'Kindt
- Research Institute for Chromatography (RIC) , Kortrijk, Belgium
| | - Petra Martin
- Department of Medical Oncology, Midland Regional Hospital Tullamore/St. James's Hospital , Dublin, Ireland
| | - Deborah Penque
- Human Genetics Department, Instituto Nacional De Saúde Dr Ricardo Jorge, Lisboa, Portugal and Centre for Toxicogenomics and Human Health, Universidade Nova De Lisboa , Lisbon,Portugal
| | - Ines Lanca Martins
- Human Genetics Department, Instituto Nacional De Saúde Dr Ricardo Jorge, Lisboa, Portugal and Centre for Toxicogenomics and Human Health, Universidade Nova De Lisboa , Lisbon,Portugal
| | - Ede Bodoki
- Analytical Chemistry Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca, Romania
| | - Bogdan-Cezar Iacob
- Analytical Chemistry Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca, Romania
| | - Eda Aydindogan
- Department of Chemistry, Graduate School of Sciences and Engineering, Koç University , Istanbul, Turkey
| | - Suna Timur
- Institute of Natural Sciences, Department of Biochemistry, Ege University , Izmir, Turkey
| | | | | | - Theo Luider
- Department of Neurology, Erasmus MC , Rotterdam, The Netherlands
| | | | - Marei Sammar
- Ephraim Katzir Department of Biotechnology Engineering, ORT Braude College , Karmiel, Israel
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Medić B, Stojanović M, Stimec BV, Divac N, Vujović KS, Stojanović R, Čolović M, Krstić D, Prostran M. Lithium - Pharmacological and Toxicological Aspects: The Current State of the Art. Curr Med Chem 2020; 27:337-351. [DOI: 10.2174/0929867325666180904124733] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 07/16/2018] [Accepted: 07/19/2018] [Indexed: 12/21/2022]
Abstract
:
Lithium is the smallest monovalent cation with many different biological effects.
Although lithium is present in the pharmacotherapy of psychiatric illnesses for decades, its
precise mechanism of action is still not clarified. Today lithium represents first-line therapy
for bipolar disorders (because it possesses both antimanic and antidepressant properties) and
the adjunctive treatment for major depression (due to its antisuicidal effects). Beside, lithium
showed some protective effects in neurological diseases including acute neural injury, chronic
degenerative conditions, Alzheimer's disease as well as in treating leucopenia, hepatitis and
some renal diseases. Recent evidence suggested that lithium also possesses some anticancer
properties due to its inhibition of Glycogen Synthase Kinase 3 beta (GSK3β) which is included
in the regulation of a lot of important cellular processes such as: glycogen metabolism,
inflammation, immunomodulation, apoptosis, tissue injury, regeneration etc.
:
Although recent evidence suggested a potential utility of lithium in different conditions, its
broader use in clinical practice still trails. The reason for this is a narrow therapeutic index of
lithium, numerous toxic effects in various organ systems and some clinically relevant interactions
with other drugs. Additionally, it is necessary to perform more preclinical as well as
clinical studies in order to a precise therapeutic range of lithium, as well as its detailed
mechanism of action. The aim of this review is to summarize the current knowledge concerning
the pharmacological and toxicological effects of lithium.
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Affiliation(s)
- Branislava Medić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Bojan V. Stimec
- Anatomy Sector, Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Nevena Divac
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Katarina Savić Vujović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Radan Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Mirjana Čolović
- Department of Physical Chemistry, “Vinca“ Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
| | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Milica Prostran
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Bošnjaković-Pavlović N, Xu X, Krstić D, Gillet JM, Wei Y, Wu P, Čolović M, Spasojević-de Biré A. Experimental and theoretical insights of functionalized hexavanadates on Na +/K +-ATPase activity; molecular interaction field, ab initio calculations and in vitro assays. J Inorg Biochem 2019; 198:110720. [PMID: 31150927 DOI: 10.1016/j.jinorgbio.2019.110720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 04/27/2019] [Accepted: 05/13/2019] [Indexed: 02/02/2023]
Abstract
The influence of three functionalized hexavanadates (V6): Na2 [V6O13{(OCH2)3CCH3}2], [H2]2 [V6O13{(OCH2)3CCH2OCOCH2CH3}2] and [(C4H9)4N]2 [V6O13{(OCH2)3CCH2OOC(CH3)2-COOH}2 on Na+/K+-ATPase activity, was investigated in vitro. Including compounds already tested by Xu et al. (Journal of Inorganic Biochemistry 161 (2016) 27-36), all functionalized hexavanadates inhibit the activity of Na+/K+-ATPase in a dose-dependent manner but with different inhibitory potencies. Na2 [V6O13{(OCH2)3CCH3}2] was found to have the best inhibition properties - showing 50% inhibition IC50 = 5.50 × 10-5 M, while [(C4H9)4N]2 [V6O13{(OCH2)3CCH2OOC(CH3)2-COOH}2] showed the lowest inhibitory power, IC50 = 1.31 × 10-4 M. In order to understand the bioactivity of functionalized hexavanadates series, we have also used a combined theoretical approach: determination of electrostatic potential from ab initio theoretical calculations and computation of the molecular interaction field (MIF) surface.
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Affiliation(s)
- Nada Bošnjaković-Pavlović
- Université Paris-Saclay, CentraleSupélec, Campus de Paris-Saclay, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France; CNRS, UMR 8580, Laboratory "Structures Propriétés et Modélisation des Solides" (SPMS), Campus de Gif, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France
| | - Xiao Xu
- Université Paris-Saclay, CentraleSupélec, Campus de Paris-Saclay, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France; CNRS, UMR 8580, Laboratory "Structures Propriétés et Modélisation des Solides" (SPMS), Campus de Gif, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France
| | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Serbia
| | - Jean-Michel Gillet
- Université Paris-Saclay, CentraleSupélec, Campus de Paris-Saclay, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France; CNRS, UMR 8580, Laboratory "Structures Propriétés et Modélisation des Solides" (SPMS), Campus de Gif, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France
| | - Yongge Wei
- Department of Chemistry, Tsinghua University, 100084 Beijing, PR China
| | - Pingfan Wu
- Institute of POM-based Materials, The Synergistic Innovation Center of Catalysis Materials of Hubei Province, Hubei University of Technology, 430086 Wuhan, Hubei Province, PR China
| | - Mirjana Čolović
- Department of Physical Chemistry, Vinča Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - Anne Spasojević-de Biré
- Université Paris-Saclay, CentraleSupélec, Campus de Paris-Saclay, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France; CNRS, UMR 8580, Laboratory "Structures Propriétés et Modélisation des Solides" (SPMS), Campus de Gif, 8-10 rue Joliot-Curie, 91190 Gif-sur-Yvette, France.
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Đurić M, Mutavdžin S, Lončar-Stojiljković D, Kostić S, Čolović M, Krstić D, Živković V, Jakovljević V, Đurić D. The effects of certain gasotransmitters inhibition on homocysteine acutely induced changes on rat cardiac acetylcholinesterase activity. Scripta Medica 2019. [DOI: 10.5937/scriptamed50-22658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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10
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Đurić M, Kostić S, Lončar-Stojiljković D, Mutavdžin S, Čolović M, Krstić D, Stevanović P, Đurić D. The effects of gasotransmitters inhibition on homocysteine acutely induced changes in oxidative stress markers in rat plasma. Scripta Medica 2019. [DOI: 10.5937/scriptamed50-21100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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11
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Dinčić M, Sarić M, Čolović M, Todorović J, Ignjatović S, Radosavljević B, Mougharbel AS, Kortz U, Krstić D. TOXICITY EVALUATION OF TWO BIOLOGICALLY ACTIVE POLYOXOTUNGSTATES. Pathophysiology 2018. [DOI: 10.1016/j.pathophys.2018.07.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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12
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Uzelac JJ, Stanić M, Krstić D, Čolović M, Djurić D. Effects of homocysteine and its related compounds on oxygen consumption of the rat heart tissue homogenate: the role of different gasotransmitters. Mol Cell Biochem 2017; 444:143-148. [DOI: 10.1007/s11010-017-3238-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 11/24/2017] [Indexed: 10/18/2022]
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13
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Rašić-Marković A, Hrnčić D, Djurić D, Puškaš N, Krstić D, Stanojlović O. 21. The effect of folic acid on lindane induced seizures in adult rats. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2012.12.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Petrović V, Čolović M, Krstić D, Vujačić A, Petrović S, Joksić G, Bugarčić Z, Vasić V. In vitro effects of some gold complexes on Na(+)/K(+) ATPase activity and cell proliferation. J Inorg Biochem 2013; 124:35-41. [PMID: 23591145 DOI: 10.1016/j.jinorgbio.2013.03.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/25/2013] [Accepted: 03/25/2013] [Indexed: 11/17/2022]
Abstract
The in vitro influence of gold(III) complexes, H[AuCl4], [Au(DMSO)2Cl2]Cl and [Au(bipy)Cl2]Cl (bipy = 2,2'-bipyridine), upon commercially available Na(+)/K(+) ATPase activity, purified from porcine brain cortex, was investigated. Additionally, the complexes were tested on human lymphocytes, and incidence of micronuclei and cell proliferation index was determined. Concentration-dependent inhibition of the enzyme for all three compounds was obtained, but with differing potencies. Calculated IC50 from Hill analysis were (in M): 5.75×10(-7), 5.50×10(-6) and 3.98×10(-5), for H[AuCl4], [Au(DMSO)2Cl2]Cl and [Au(bipy)Cl2]Cl, respectively, while Hill coefficient values, n, were above 1 in all cases. This inhibition can be prevented using -SH donating ligands such as L-Cys and glutathione, and these ligands can also cause a recovery of the enzyme activity after the induced inhibition. Kinetic analysis demonstrated that each of the studied gold(III) complexes affects Na(+)/K(+) ATPase reducing maximum enzymatic velocity, Vmax, but not significantly changing the affinity for the substrate (KM value), implying a noncompetitive mode of the interaction. Furthermore, among investigated gold(III) complexes, the [Au(bipy)Cl2]Cl complex exhibits a strong cytotoxic effect on human lymphocytes, which suggests its potential for use in antitumor therapy.
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Affiliation(s)
- Voin Petrović
- Department of Physical Chemistry, Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
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15
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Mladenović D, Krstić D, Colović M, Radosavljević T, Rasić-Marković A, Hrncić D, Macut D, Stanojlović O. Different sensitivity of various brain structures to thioacetamide-induced lipid peroxidation. Med Chem 2012; 8:52-8. [PMID: 22420551 DOI: 10.2174/157340612799278603] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 11/04/2011] [Indexed: 02/08/2023]
Abstract
Thioacetamide (TAA) exerts hepatotoxic, neurotoxic and carcinogenic effects. The aim of our study was to investigate the effects of TAA on lipid peroxidation and catalase activity in various rat brain regions. Male Wistar rats were divided into following groups: 1. control, saline-treated; 2. thioacetamide-treated groups, TAA300 (300 mg/kg), TAA600 (600 mg/kg) and TAA900 (900 mg/kg). Daily dose of TAA (300 mg/kg) was administered intraperitoneally once (TAA300), twice (TAA600) and three times (TAA900) in consecutive days. Brain samples were collected 24 h after the last dose of TAA and malondialdehyde (MDA) level and catalase activity were determined in cortex, brainstem and hippocampus. MDA level was significantly increased while catalase activity was significantly lower in all brain regions in TAA900 group in comparison with control group. In TAA600 MDA level was increased in the brainstem and cortex when compared to control (p < 0.01). The same dose of TAA 600 mg/kg induced a significant decline in catalase activity in the brainstem and cortex and an increase in its activity in the hippocampus when compared to control (p < 0.01). In TAA300 an increase in MDA level was evident only in the brainstem. Catalase activity was significantly higher in the cortex and hippocampus in TAA300 group in comparison with control (p < 0.01). Based on these results, it may be concluded that various rat brain regions have different sensitivity to TAA-induced lipid peroxidation with hippocampus being less sensitive than cerebral cortex and brainstem.
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Affiliation(s)
- Dusan Mladenović
- Institute of Pathophysiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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16
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Krstić D, Čolović M, Leskovac A, Vasić V. The effect of diazinon on Na+/K+-ATPase activity. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.1025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Colović M, Krstić D, Petrović S, Leskovac A, Joksić G, Savić J, Franko M, Trebse P, Vasić V. Toxic effects of diazinon and its photodegradation products. Toxicol Lett 2009; 193:9-18. [PMID: 19948211 DOI: 10.1016/j.toxlet.2009.11.022] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2009] [Revised: 11/13/2009] [Accepted: 11/25/2009] [Indexed: 10/20/2022]
Abstract
The toxic effects of diazinon and its irradiated solutions were investigated using cultivated human blood cells (lymphocytes and erythrocytes) and skin fibroblasts. Ultra Performance Liquid Chromatography (UPLC)-UV/VIS system was used to monitor the disappearance of starting diazinon during 115-min photodegradation and formation of its by-products (diazoxon and 2-isopropyl-6-methyl-4-pyrimidinol (IMP)) as a function of time. Dose-dependent AChE and Na(+)/K(+)-ATPase inhibition by diazinon was obtained for all investigated cells. Calculated IC(50) (72 h) values, in M, were: 7.5x10(-6)/3.4x10(-5), 8.7x10(-5)/6.6x10(-5), and 3.0x10(-5)/4.6x10(-5) for fibroblast, erythrocyte and lymphocyte AChE/Na(+)/K(+)-ATPase, respectively. Results obtained for reference commercially purified target enzymes indicate similar sensitivity of AChE towards diazinon (IC(50) (20 min)-7.8x10(-5)M), while diazinon concentrations below 10mM did not noticeably affect Na(+)/K(+)-ATPase activity. Besides, diazinon and IMP induced increasing incidence of micronuclei (via clastogenic mode of action) in a dose-dependent manner up to 2x10(-6)M and significant inhibition of cell proliferation and increased level of malondialdehyde at all investigated concentrations. Although after 15-min diazinon irradiation formed products do not affect purified commercial enzymes activities, inhibitory effect of irradiated solutions on cell enzymes increased as a function of time exposure to UV light and resulted in significant reduction of AChE (up to 28-45%) and Na(+)/K(+)-ATPase (up to 35-40%) at the end of irradiation period. Moreover, photodegradation treatment strengthened prooxidative properties of diazinon as well as its potency to induce cytogenetic damage.
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Affiliation(s)
- Mirjana Colović
- Department of Physical Chemistry, Vinca Institute of Nuclear Sciences, Belgrade, Serbia
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18
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Čolović M, Krstić D, Krinulović K, Momić T, Savić J, Vujačić A, Vasić V. Na+/K+-ATPase: Activity and inhibition. Russ J Phys Chem 2009. [DOI: 10.1134/s0036024409090337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Vasić D, Savić J, Bugarcić Z, Krstić D, Tomić N, Colović M, Petković M, Vasić V. Interaction of the [PtCl2(DMSO)2] complex with L-cysteine. ACTA ACUST UNITED AC 2009; 64:103-8. [PMID: 19323274 DOI: 10.1515/znc-2009-1-217] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The reaction between [PtCl2(DMSO)2] and L-cysteine (L-Cys) has been investigated in the presence of micelles of sodium dodecyl sulfate (SDS)--as a model for biological membranes. Additionally, the inhibitory effect of [PtCl2(DMSO)2] on the Na+,K+-ATPase activity and its partial prevention with 10 mM L-Cys were demonstrated. The interaction of L-Cys with [PtCl2(DMSO)2] resulted in the formation of a [Pt(DMSO)2(L-Cys)2]2+ (DMSO)2] complex, which most probably occurs through stepwise replacement of Cl(-) with L-Cys. It has also been demonstrated that neither the pH value nor SDS affects the composition of the new complex. On the other hand, the pH value and SDS do affect the reaction rate, most probably due to electrostatic interactions with reactants. In summary, this study can be used as a simple model approach for the investigation of reaction mechanisms between platinum complexes and various biomolecules, and for the determination of potential toxicity and/or side effects of antitumour platinum drugs.
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Affiliation(s)
- Dragana Vasić
- Department of Physical Chemistry 050, Vinca Institute of Nuclear Sciences, PO Box 522, 11 000 Belgrade, Serbia
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Rašić-Marković A, Stanojlović O, Hrnčić D, Krstić D, Čolović M, Šušić V, Radosavljević T, Mladenović D, Vučević D, Djuric D. 11. The activity of erythrocyte and brain Na+/K+-ATPase in rats subjected to acute homocysteine and homocysteine thiolactone administration. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Rasić-Marković A, Stanojlović O, Hrncić D, Krstić D, Colović M, Susić V, Radosavljević T, Djuric D. The activity of erythrocyte and brain Na+/K+ and Mg2+-ATPases in rats subjected to acute homocysteine and homocysteine thiolactone administration. Mol Cell Biochem 2009; 327:39-45. [PMID: 19224340 DOI: 10.1007/s11010-009-0040-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Accepted: 01/28/2009] [Indexed: 02/08/2023]
Abstract
Hyperhomocysteinemia is associated with various pathologies including cardiovascular disease, stroke, and cognitive dysfunctions. Systemic administration of homocysteine can trigger seizures in animals, and patients with homocystinuria suffer from epileptic seizures. Available data suggest that homocysteine can be harmful to human cells because of its metabolic conversion to homocysteine thiolactone, a reactive thioester. A number of reports have demonstrated a reduction of Na+/K+-ATPase activity in cerebral ischemia, epilepsy and neurodegeneration possibly associated with excitotoxic mechanisms. The aim of this study was to examine the in vivo effects of D,L-homocysteine and D,L-homocysteine thiolactone on Na+/K+- and Mg2+-ATPase activities in erythrocyte (RBC), brain cortex, hippocampus, and brain stem of adult male rats. Our results demonstrate a moderate inhibition of rat hippocampal Na+/K+-ATPase activity by D,L-homocysteine, which however expressed no effect on the activity of this enzyme in the cortex and brain stem. In contrast, D,L-homocysteine thiolactone strongly inhibited Na+/K+-ATPase activity in cortex, hippocampus and brain stem of rats. RBC Na+/K+-ATPase and Mg2+-ATPase activities were not affected by D,L-homocysteine, while D,L-homocysteine thiolactone inhibited only Na+/K+-ATPase activity. This study results show that homocysteine thiolactone significantly inhibits Na+/K+-ATPase activity in the cortex, hippocampus, and brain stem, which may contribute at least in part to the understanding of excitotoxic and convulsive properties of this substance.
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Affiliation(s)
- Aleksandra Rasić-Marković
- Laboratory of Neurophysiology, Institute of Medical Physiology, School of Medicine, University of Belgrade, Visegradska 26/II, 11000 Belgrade, Serbia
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22
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Milenković B, Stevanović N, Krstić D, Nikezić D. Numerical solving of the track wall equation in LR115 detectors etched in direct and reverse directions. RADIAT MEAS 2009. [DOI: 10.1016/j.radmeas.2008.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Krstić D, Čolović M, Bošnjaković-Pavlović N, Spasojević-De Bire A, Vasić V. Influence of decavanadate on rat synaptic plasma membrane ATPases activity. Gen Physiol Biophys 2009; 28:302-8. [DOI: 10.4149/gpb_2009_03_302] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Krstić D, Krinulović K, Vasić V. Inhibition of Na+/K+-ATPase and Mg2+-ATPase by metal ions and prevention and recovery of inhibited activities by chelators. J Enzyme Inhib Med Chem 2008; 20:469-76. [PMID: 16335055 DOI: 10.1080/14756360500213280] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Kinetics and inhibition of Na(+)/K(+)-ATPase and Mg(2+)-ATPase activity from rat synaptic plasma membrane (SPM), by separate and simultaneous exposure to transition (Cu(2+), Zn(2+), Fe(2+) and Co(2+)) and heavy metals (Hg(2+) and Pb(2+)) ions were studied. All investigated metals produced a larger maximum inhibition of Na(+)/K(+)-ATPase than Mg(2+)-ATPase activity. The free concentrations of the key species (inhibitor, MgATP(2-), MeATP(2-)) in the medium assay were calculated and discussed. Simultaneous exposure to the combinations Cu(2+)/Fe(2+) or Hg(2+)/Pb(2+) caused additive inhibition, while Cu(2+)/Zn(2+) or Fe(2+)/Zn(2+) inhibited Na(+)/K(+)-ATPase activity synergistically (i.e., greater than the sum metal-induced inhibition assayed separately). Simultaneous exposure to Cu(2+)/Fe(2+) or Cu(2+)/Zn(2+) inhibited Mg(2+)-ATPase activity synergistically, while Hg(2+)/Pb(2+) or Fe(2+)/Zn(2+) induced antagonistic inhibition of this enzyme. Kinetic analysis showed that all investigated metals inhibited Na(+)/K(+)-ATPase activity by reducing the maximum velocities (V(max)) rather than the apparent affinity (Km) for substrate MgATP(2-), implying the noncompetitive nature of the inhibition. The incomplete inhibition of Mg(2+)-ATPase activity by Zn(2+), Fe(2+) and Co(2+) as well as kinetic analysis indicated two distinct Mg(2+)-ATPase subtypes activated in the presence of low and high MgATP(2-) concentration. EDTA, L-cysteine and gluthathione (GSH) prevented metal ion-induced inhibition of Na(+)/K(+)-ATPase with various potencies. Furthermore, these ligands also reversed Na(+)/K(+)-ATPase activity inhibited by transition metals in a concentration-dependent manner, but a recovery effect by any ligand on Hg(2+)-induced inhibition was not obtained.
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Affiliation(s)
- Danijela Krstić
- Department of Chemistry, School of Medicine, University of Belgrade, Visegradska, Belgrade, Serbia & Montenegro
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25
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Krstić D, Tomić N, Krinulović K, Vasić V. The influence of potassium ion (K+) on digoxin-induced inhibition of porcine cerebral cortex Na+/K+-ATPase. J Enzyme Inhib Med Chem 2008; 21:471-5. [PMID: 17059183 DOI: 10.1080/14756360600642230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
The in vitro influence of potassium ion modulations, in the concentration range 2 mM-500 mM, on digoxin-induced inhibition of porcine cerebral cortex Na+ / K+-ATPase activity was studied. The response of enzymatic activity in the presence of various K+ concentrations to digoxin was biphasic, thereby, indicating the existence of two Na+ / K+-ATPase isoforms, differing in the affinity towards the tested drug. Both isoforms showed higher sensitivity to digoxin in the presence of K+ ions below 20 mM in the medium assay. The IC50 values for high/low isoforms 2.77 x 10(-6) M / 8.56 x 10(-5) M and 7.06 x 10(-7) M / 1.87 x 10(-5) M were obtained in the presence of optimal (20 mM) and 2 mM K+, respectively. However, preincubation in the presence of elevated K+ concentration (50-500 mM) in the medium assay prior to Na+ / K+-ATPase exposure to digoxin did not prevent the inhibition, i.e. IC50 values for both isoforms was the same as in the presence of the optimal K+ concentration. On the contrary, addition of 200 mM K+ into the medium assay after 10 minutes exposure of Na+ / K+-ATPase to digoxin, showed a time-dependent recovery effect on the inhibited enzymatic activity. Kinetic analysis showed that digoxin inhibited Na+ / K+-ATPase by reducing maximum enzymatic velocity (Vmax) and Km, implying an uncompetitive mode of interaction.
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Affiliation(s)
- Danijela Krstić
- Institute of Chemistry, School of Medicine, University of Belgrade, Belgrade, Serbia & Montenegro
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26
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Krstić D, Krinulović K, Spasojević-Tisma V, Joksić G, Momić T, Vasić V. Effects of Digoxin and Gitoxin on the Enzymatic Activity and Kinetic Parameters of Na+/K+-ATPase. J Enzyme Inhib Med Chem 2008; 19:409-15. [PMID: 15648655 DOI: 10.1080/14756360410001722065] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Inhibition of Na+/K+-ATPase activity from human erythrocyte membranes and commercial porcine cerebral cortex by in vitro single and simultaneous exposure to digoxin and gitoxin was investigated to elucidate the difference in the mechanism of the enzyme inhibition by structurally different cardiac glycosides. The drugs exerted a biphasic dose-dependent inhibitory effect on the enzyme activity in both tissues, supporting the existence of two sensitive Na+/K+-ATPase isoforms. The IC50 values for the low and high affinity isoforms were calculated from the inhibition curves using mathematical analysis. The Hill coefficient (n) fulfilled the relationship 1 < n < 3, suggesting cooperative binding of inhibitors to the enzyme. Kinetic analysis showed that digoxin and gitoxin inhibited Na+/K+-ATPase by reducing the maximum enzymatic velocity (Vmax) and Km, implying an uncompetitive mode of interaction. Both the isoforms were always more sensitive to gitoxin. The erythrocyte enzyme was more sensitive to the inhibitors in the range of low concentrations but the commercial cerebral cortex enzyme exerted a higher sensitivity in high inhibitors affinity concentration range. By simultaneous exposure of the enzyme to digoxin and gitoxin in combinations a synergistic effect was achieved by low inhibitor concentrations. An antagonistic effect was obtained with erythrocyte membrane enzyme at high inhibitors concentration.
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Affiliation(s)
- Danijela Krstić
- University of Belgrade, School of Medicine, Visegradska 26, 11000 Belgrade, Serbia and Montenegro, Minor Yugoslavia
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Krstić D, Çolović M, Kralj MB, Trebše P, Krinulović K, Vasić V. The Influence of Malathion and Its Decomposition Products on Free and Immobilized Acetylcholinesterase1. Russ J Phys Chem 2008. [DOI: 10.1134/s0036024408040274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Rezić I, Krstić D, Bokić L. Ultrasonic extraction of resins from an historic textile. Ultrason Sonochem 2008; 15:21-4. [PMID: 17822938 DOI: 10.1016/j.ultsonch.2007.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2007] [Revised: 06/28/2007] [Accepted: 06/29/2007] [Indexed: 05/17/2023]
Abstract
Ultrasound assisted extraction was applied on the historical textile as the most appropriate sample preparation step for the identification of the resinous binder. Fragile silk banner from the 19th century was analyzed for the presence of different resins. After the ultrasonic extraction with ethyl acetate in the ultrasonic bath, resinous materials and unknown sample from the banner were separated by thin layer chromatography. The multiple developments in benzene-methanol (95:5) system as mobile phase and silica gel layer as stationary phase were applied, and afterwards the video densitometry determination of the components was performed by means of video camera HV-C20. The shellac resin was determined as an important part of the complex binder.
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Affiliation(s)
- I Rezić
- Laboratory of Analytical Chemistry, Department of Textile Chemistry and Material Testing, Faculty of Textile Technology, University of Zagreb, Prilaz Baruna Filipovića 30, 10000 Zagreb, Croatia.
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Krstić D, Colović M, Krinulović K, Djurić D, Vasić V. Inhibition of AChE by single and simultaneous exposure to malathion and its degradation products. Gen Physiol Biophys 2007; 26:247-253. [PMID: 18281741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In vitro inhibition of bovine erythrocytes acetylcholinesterase (AchE) by separate and simultaneous exposure to organophosphorous insecticide malathion and the transformation products, which are generally formed during the storage or natural as well as photochemical degradation pathways of malathion, was investigated. The increasing concentration of malathion, its oxidation product - malaoxon and isomerisation product - isomalathion inhibited AChE activity in a concentration-dependent manner. The half-maximum inhibitory concentrations (IC(50) values): (3.2 +/- 0.1) x 10(-5) mol/l, (4.7 +/- 0.8) x 10(-7) mol/l and (6.0 +/- 0.5) x 10(-7)mol/l were obtained from the inhibition curves induced by malathion, malaoxon and isomalathion, respectively. However, the products formed due to photoinduced degradation, phosphorodithioic O,O,S-trimethyl phosphorodithioic ester (OOS(S)) and O,O-dimethyl thiophosphate did not noticeably affect the enzyme activity at all investigated concentrations, while diethyl maleate inhibited the AChE activity at concentrations >10 mmol/l. By simultaneous exposure of the enzyme to malaoxon and isomalathion in various concentration combinations the additive effect was achieved by low concentration of inhibitors, while the antagonistic effect was obtained at high concentration (>or= 3 x 10(-7) mol/l) of inhibitors. Inhibitory power of irradiated samples of 1 +/- 10(-5) mol/l malathion can be attributed to the formation of malaoxon and isomalathion, organophosphates about 100 times more toxic than their parent compound, while the presence of non-inhibiting degradation product OOS(S) did not affect the inhibitor efficiency of inhibiting malathion by-products, malaoxon and isomalathion.
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Affiliation(s)
- D Krstić
- Institute of Chemistry, University School of Medicine, Visegradska 26, 11 000 Belgrade, Serbia.
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Abstract
Calculations of absorbed doses in organs of the human body and the total effective dose due to Cs in soil as a source of external exposure are presented in this work. Calculations were done using the MCNP-4B software package. The assumption was made that photons with an energy of 662 keV are emitted in a cylindrical volumetric source in soil up to the depth of 20 cm. Depth distributions of Cs at 19 locations around Kragujevac (a city in central Serbia) were measured by a HPGe detector. An ORNL phantom of an adult human standing on the soil above the center of a cylindrical radioactive source was used to calculate the conversion coefficients, i.e., absorbed doses in an organ per unit specific activity. The conversion coefficients in organs are given as a function of the source depth in soil. The largest absorbed dose was found in skin. The annual effective dose in humans was estimated from these calculations and the measured activity depth profile of Cs in soil. The average effective dose was found to be 3.17 microSv y. This value was rather small in comparison with other sources of natural ionizing radiation. One may conclude that Cs was a negligible source of external exposure in the area around the city.
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Affiliation(s)
- D Krstić
- University of Kragujevac, Faculty of Science, R. Domanovica 12, 34000 Kragujevac, Serbia and Montenegro
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Krinulović K, Bugarcić Z, Vrvić M, Krstić D, Vasić V. Prevention and recovery of (mu(3)-diethylentriamino)-chloro-palladium(II)-chloride induced inhibition of Na/K-ATPase by SH containing ligands--L-cysteine and glutathione. Toxicol In Vitro 2006; 20:1292-9. [PMID: 16697549 DOI: 10.1016/j.tiv.2006.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Revised: 02/01/2006] [Accepted: 03/01/2006] [Indexed: 10/24/2022]
Abstract
The effect of (mu(3)-diethylentriamino)-chloro-palladium(II)-chloride ([PdCl(dien)]Cl) on the activity of Na/K-ATPase from porcine cerebral cortex was studied in vitro, in the absence and presence of -SH containing ligands L-cysteine and glutathione (GSH). The aim of the study was to elucidate the mechanism of [PdCl(dien)](+) induced inhibition of the enzyme activity and to examine the ability of thiols to prevent and recover the inhibition. The coordinative interaction between [PdCl(dien)](+) and enzyme was verified by UV and (1)H NMR spectra. The semblance in the changes in absorption spectra of [PdCl(dien)](+) in the presence of Na/K-ATPase and thiols (L-cysteine and GSH) suggested that the complex ion interacts with enzymatic sulfhydryl groups. [PdCl(dien)](+) inhibited the enzyme activity in a dose-dependent manner. The Hill analysis of the inhibition curve yielded the half-maximum inhibitory activity value, IC(50)=1.21 x 10(-4)M, and Hill coefficient, n=0.7, suggesting the negative cooperation for binding of [PdCl(dien)](+) to the enzyme. Dependence of the initial reaction rate on the concentration of MgATP(2-) exhibited typical Michelis-Menten kinetics in the absence and presence of the inhibitor. Kinetic analysis showed that [PdCl(dien)](+) inhibited Na/K-ATPase by reducing the maximum reaction rate (V(max)), rather than changing the affinity to the substrate (K(m)). Kinetic parameters derived using Lineweaver-Burk transformation of experimental data indicated the non-competitive nature of Na/K-ATPase inhibition. The inhibitory constant, K(i)=1.05 x 10(-4)M, was determined from secondary replot of Lineweaver-Burk graph, and correlated with stability constants of [Pd(dien)(thiol)] complexes. 1 x 10(-3)M L-cysteine or GSH prevented the enzyme inhibition induced by Pd(II) complex cation when present below 1 x 10(-4)M. The both thiols completely reversed the inhibited activity in the concentration dependent manner, due to the complex formation with [PdCl(dien)](+).
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Affiliation(s)
- Katarina Krinulović
- Vinca Institute of Nuclear Sciences, Department of Physical Chemistry, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro
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Abstract
In this paper, a vertical distribution of 137Cs in undisturbed soil was investigated experimentally and theoretically. Soil samples were taken from the surroundings of the city of Kragujevac in central Serbia during spring-summer of 2001. The sampling locations were chosen in such a way that the influence of soil characteristics on depth distribution of 137Cs in soil could be investigated. Activity of 137Cs in soil samples was measured using a HpGe detector and multi-channel analyzer. Based on vertical distribution of 137Cs in soil which was measured for each of 10 locations, the diffusion coefficient of 137Cs in soil was determined. In the next half-century, 137Cs will remain as the source of the exposure. Fifteen years after the Chernobyl accident, and more than 30 years after nuclear probes, the largest activity of 137Cs is still within 10 cm of the upper layer of the soil. This result confirms that the penetration of 137Cs in soil is a very slow process. Experimental results were compared with two different Green functions and no major differences were found between them. While both functions fit experimental data well in the upper layer of soil, the fitting is not so good in deeper layers. Although the curves obtained by these two functions are very close to each other, there are some differences in the values of parameters acquired by them.
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Affiliation(s)
- D Krstić
- University of Kragujevac, Faculty of Science, R.Domanovica 12 Kragujevac 34000, Serbia and Montenegro
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Vasić V, Jovanović D, Krstić D, Nikezić G, Horvat A, Vujisić L, Nedeljković N. Prevention and recovery of CuSO4-induced inhibition of Na+/K+ -ATPase and Mg2+ -ATPase in rat brain synaptosomes by EDTA. Toxicol Lett 1999; 110:95-104. [PMID: 10593600 DOI: 10.1016/s0378-4274(99)00144-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Enzymatic activities of Na+/K+-ATPase and Mg2+ -ATPase from rat brain synaptic plasma membrane were studied in the absence and presence of EDTA. The aim of the study was to examine the ability of this strong chelator to prevent and recover the CuSO4-induced inhibition. The influence of experimentally added CuSO4 and EDTA on MgATP2- complex and 'free' Cu2+ concentrations in the reaction mixture was calculated and discussed. CuSO4 induced dose-dependent inhibition of both enzymes in the absence and presence of 1 mM EDTA. In the absence of EDTA, the IC50 values of Cu2+, as calculated from the experimental curves, were 5.9x10(-7) M for Na+/K+ -ATPase and 3.6x10(-6) M for Mg2+ -ATPase. One millimolar EDTA prevented the enzyme inhibition induced by CuSO4, but also reversed the inhibited activity, in a concentration-dependent manner, following exposure of the enzymes to the metal ion, by lowering 'free' Cu2+ concentration. Kinetic analysis showed that CuSO4 inhibits both the Na+/K+ -ATPase and Mg2+ -ATPase, by reducing their maximum enzymatic velocities (Vmax), rather than apparent affinity for substrate MgATP2- (K0.5), implying the noncompetitive nature of enzyme inhibition induced by the metal. The kinetic analysis also confirmed two distinct Mg2+ -ATPase subtypes activated in the presence of low and high MgATP2- concentrations. K0.5 and Vmax were calculated using a computer-based program. The results of calculation showed that MgATP2- concentration in the kinetic experiments exceeded three times the apparent K0.5 value for the enzyme activation.
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Affiliation(s)
- V Vasić
- Department of Physical Chemistry, Vinca Institute of Nuclear Sciences, Belgrade, Yugoslavia.
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Abstract
Radon progeny are positively charged immediately after formation. A negatively charged electret collects radon progeny atoms which are produced in the diffusion chamber. The detector sensitivity may be increased by using an electret in front of solid state nuclear track detector. Dependence of detection sensitivity on distance between electret and detector LR115 II is studied theoretically and experimentally in this paper. A relatively small fraction of 218Po atoms that formed in the diffusion chamber are collected by the electret. We estimated that the attracted fraction of 218Po was 17% while the attracted fraction of 214Bi-214Po is considerably larger and amounted to approximately 60%. These results confirm previous finding that 218Po atoms discharge quickly after their formation. The comparative radon measurements using diffusion chambers with and without electrets were performed. The amplification of detector sensitivity due to the electret amounted to approximately 80%.
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Affiliation(s)
- D Nikezić
- Faculty of Natural Sciences, Kragujevac, Yugoslavia
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