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Liu X, Li Y, Jia J, Wang H, Xi Y, Sun A, Wang L, Deng X, Chen Z, Fan Y. Analysis of non-physiological shear stress-induced red blood cell trauma across different clinical support conditions of the blood pump. Med Biol Eng Comput 2024:10.1007/s11517-024-03121-z. [PMID: 38802609 DOI: 10.1007/s11517-024-03121-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 05/04/2024] [Indexed: 05/29/2024]
Abstract
Systematic research into device-induced red blood cell (RBC) damage beyond hemolysis, including correlations between hemolysis and RBC-derived extracellular vesicles, remains limited. This study investigated non-physiological shear stress-induced RBC damage and changes in related biochemical indicators under two blood pump clinical support conditions. Pressure heads of 100 and 350 mmHg, numerical simulation methods, and two in vitro loops were utilized to analyze the shear stress and changes in RBC morphology, hemolysis, biochemistry, metabolism, and oxidative stress. The blood pump created higher shear stress in the 350-mmHg condition than in the 100-mmHg condition. With prolonged blood pump operation, plasma-free hemoglobin and cholesterol increased, whereas plasma glucose and nitric oxide decreased in both loops. Notably, plasma iron and triglyceride concentrations increased only in the 350-mmHg condition. The RBC count and morphology, plasma lactic dehydrogenase, and oxidative stress across loops did not differ significantly. Plasma extracellular vesicles, including RBC-derived microparticles, increased significantly at 600 min in both loops. Hemolysis correlated with plasma triglyceride, cholesterol, glucose, and nitric oxide levels. Shear stress, but not oxidative stress, was the main cause of RBC damage. Hemolysis alone inadequately reflects overall blood pump-induced RBC damage, suggesting the need for additional biomarkers for comprehensive assessments.
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Affiliation(s)
- Xinyu Liu
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Yuan Li
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Jinze Jia
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Hongyu Wang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Yifeng Xi
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Anqiang Sun
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Lizhen Wang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Xiaoyan Deng
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Zengsheng Chen
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China.
| | - Yubo Fan
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Room 223, Building 5, No.37 Xueyuan Road, Haidian District, Beijing, 100083, China.
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Yazdanpanah MH, Sharafkhah M, Poustchi H, Etemadi A, Sheikh M, Kamangar F, Pourshams A, Boffetta P, Dawsey SM, Abnet CC, Malekzadeh R, Hashemian M. Mineral Intake and Cardiovascular Disease, Cancer, and All-Cause Mortality: Findings from the Golestan Cohort Study. Nutrients 2024; 16:344. [PMID: 38337629 PMCID: PMC10857363 DOI: 10.3390/nu16030344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 02/12/2024] Open
Abstract
Associations between mineral intake and mortality in non-Western countries have not been studied adequately. This study evaluated these associations in the Golestan Cohort Study, featuring a Middle Eastern population. The mineral intake was estimated from the baseline food frequency questionnaire, adjusted by using the nutrient density method, and divided into quintiles. We used Cox proportional hazards models to estimate hazard ratios (HR) and 95% confidence intervals (CI) for the mortality. We analyzed 41,863 subjects with a mean age of 51.46 ± 8.73 years at the baseline. During 578,694 person-years of follow-up (median: 14.1 Years), 7217 deaths were recorded. Dietary calcium intake was inversely associated with the all-cause mortality (HRQ5 vs. Q1 = 0.91, 95%CI = 0.85-0.99). We observed significant associations between calcium (HRQ5 vs. Q1 = 0.82, 95% CI = 0.73-0.93), copper (HRQ5 vs. Q1 = 1.11, 95% CI = 0.99-1.26), and selenium intake (HRQ5 vs. Q1 = 1.14, 95% CI = 1.01-1.29) and CVD mortality. Dietary phosphorus (HRQ5 vs. Q1 = 0.81, 95%CI = 0.69-0.96) and copper intake (HRQ5 vs. Q1 = 0.84, 95%CI = 0.71-0.99) were inversely associated with cancer mortality. In this study within a Middle Eastern population, a higher dietary intake of calcium exhibited an inverse association with all-cause mortality. Furthermore, nuanced associations were observed in the cause-specific mortality, suggesting potential avenues for dietary interventions and emphasizing the importance of considering dietary factors in public health strategies.
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Affiliation(s)
- Mohammad Hosein Yazdanpanah
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Maryam Sharafkhah
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Hossein Poustchi
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Arash Etemadi
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Mahdi Sheikh
- Genomic Epidemiology Branch, International Agency for Research on Cancer, 69366 Lyon, France;
| | - Farin Kamangar
- Department of Biology, School of Computer, Mathematical and Natural Sciences, Morgan State University, Baltimore, MD 21251, USA;
| | - Akram Pourshams
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Paolo Boffetta
- Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA;
- Department of Medical and Surgical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Sanford M. Dawsey
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Christian C. Abnet
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1411713135, Iran
| | - Maryam Hashemian
- Epidemiology and Community Health Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Azevedo AR, Cordeiro P, Strelow DN, de Andrade KN, Neto MRS, Goetze Fiorot R, Brüning CA, Braga AL, Lião LM, Bortolatto CF, Neto JSS, Nascimento V. Green Approach for the Synthesis of Chalcogenyl- 2,3-dihydrobenzofuran Derivatives Through Allyl-phenols/ Naphthols and Their Potential as MAO-B Inhibitors. Chem Asian J 2023:e202300586. [PMID: 37733585 DOI: 10.1002/asia.202300586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/30/2023] [Accepted: 09/20/2023] [Indexed: 09/23/2023]
Abstract
This work presents the design, synthesis, and MAO-B inhibitor activity of a series of chalcogenyl-2,3-dihydrobenzofurans derivatives. Using solvent- and metal-free methodology, a series of chalcogen-containing dihydrobenzofurans 7-9 was obtained with yields ranging from 40% to 99%, using an I2 /DMSO catalytic system. All compounds were fully structurally characterized using 1 H and 13 C NMR analysis, and the unprecedented compounds were additionally analyzed using high-resolution mass spectrometry (HRMS). In addition, the mechanistic proposal that iodide is the most likely species to act in the transfer of protons along the reaction path was studied through theoretical calculations. Finally, the compounds 7b-e, 8a-e, and 9a showed great promise as inhibitors against MAO-B activity.
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Affiliation(s)
- Amanda R Azevedo
- SupraSelen Laboratory, Department of Organic Chemistry, Universidade Federal Fluminense, Niterói, Institute of Chemistry, Campus do Valonguinho, 24020-141, RJ, Brazil
| | - Pâmella Cordeiro
- SupraSelen Laboratory, Department of Organic Chemistry, Universidade Federal Fluminense, Niterói, Institute of Chemistry, Campus do Valonguinho, 24020-141, RJ, Brazil
| | - Dianer N Strelow
- Molecular Biochemistry and Neuropharmacology Laboratory (LABIONEM), Chemical, Pharmaceutical and Food Sciences Center (CCQFA), Federal University of Pelotas Pelotas, 96010-900, RS, Brazil
| | - Karine N de Andrade
- Department of Organic Chemistry, Institute of Chemistry, Universidade Federal Fluminense Niterói, Outeiro São João Batista, s/n, 24020-141, RJ, Brazil
| | - Marcos R S Neto
- LabSelen, Department of Chemistry, Federal University of Santa Catarina, Santa Catarina, 88040-900, SC, Brazil
| | - Rodolfo Goetze Fiorot
- Department of Organic Chemistry, Institute of Chemistry, Universidade Federal Fluminense Niterói, Outeiro São João Batista, s/n, 24020-141, RJ, Brazil
| | - César A Brüning
- Molecular Biochemistry and Neuropharmacology Laboratory (LABIONEM), Chemical, Pharmaceutical and Food Sciences Center (CCQFA), Federal University of Pelotas Pelotas, 96010-900, RS, Brazil
| | - Antonio L Braga
- LabSelen, Department of Chemistry, Federal University of Santa Catarina, Santa Catarina, 88040-900, SC, Brazil
| | - Luciano M Lião
- LabRMN, Chemistry Institute, Federal University of Goiás Goiânia, 74690-900, GO, Brazil
| | - Cristiani F Bortolatto
- Molecular Biochemistry and Neuropharmacology Laboratory (LABIONEM), Chemical, Pharmaceutical and Food Sciences Center (CCQFA), Federal University of Pelotas Pelotas, 96010-900, RS, Brazil
| | - José S S Neto
- LabRMN, Chemistry Institute, Federal University of Goiás Goiânia, 74690-900, GO, Brazil
| | - Vanessa Nascimento
- SupraSelen Laboratory, Department of Organic Chemistry, Universidade Federal Fluminense, Niterói, Institute of Chemistry, Campus do Valonguinho, 24020-141, RJ, Brazil
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Antimicrobial peptide functionalized gold nanorods combining near-infrared photothermal therapy for effective wound healing. Colloids Surf B Biointerfaces 2022; 220:112887. [PMID: 36191410 DOI: 10.1016/j.colsurfb.2022.112887] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/15/2022] [Accepted: 09/25/2022] [Indexed: 12/29/2022]
Abstract
Photothermal therapy using laser activated gold nanorods (AuNRs) is a strategy for treatment of bacterial infections. Nevertheless, it also exerts cytotoxicity against human cells which leads to adverse effects in healthy human tissues and limits the applicable dose. Functionalization of AuNRs with a selective antimicrobial peptide (AMP) with higher selectivity for bacteria over human cells is a promising strategy for increasing the selectivity of the AuNRs for bacteria, hence increasing their cellular uptake by the bacteria in order to achieve stronger antimicrobial effects with lower doses of AuNRs without damaging the human cells. In this study, the surface of AuNRs was functionalized with a short AMP named C-At5 and the efficiency of the peptide functionalized AuNRs in killing gram-positive and gram-negative bacteria was evaluated in vitro as well as their potential for facilitating wound healing in a mouse model of wound infection with and without application of laser. The peptide-conjugated AuNRs exhibited higher antibacterial activity in vitro compared to the plain AuNRs both in the presence and absence of laser irradiation. Furthermore, AuNR@C-At5 had very low toxicity against human skin fibroblasts and human red blood cells indicating their higher biocompatibility compared to the plain AuNRs. Treatment of wounded mice with AuNR@C-At5 accelerated the wound healing process which was further enhanced by applying laser. The system developed in this study has great potential for customization for specific antimicrobial or antifungal therapy via conjugation of different types of AMPs with higher selectivity and can therefore serve as a guide for any future attempts in this regard.
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Tiezza MD, Ribaudo G, Orian L. Organodiselenides: Organic Catalysis and Drug Design Learning from Glutathione Peroxidase. CURR ORG CHEM 2019. [DOI: 10.2174/1385272822666180803123137] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Organodiselenides are an important class of compounds characterized by the
presence of two adjacent covalently bonded selenium nuclei. Among them,
diaryldiselenides and their parent compound diphenyl diselenide attract continuing interest
in chemistry as well as in close disciplines like medicinal chemistry, pharmacology and
biochemistry. A search in SCOPUS database has revealed that in the last three years 105
papers have been published on the archetypal diphenyl diselenide and its use in organic
catalysis and drug tests. The reactivity of the Se-Se bond and the redox properties of selenium
make diselenides efficient catalysts for numerous organic reactions, such as Bayer-
Villiger oxidations of aldehydes/ketones, epoxidations of alkenes, oxidations of alcohols
and nitrogen containing compounds. In addition, organodiselenides might find application
as mimics of glutathione peroxidase (GPx), a family of enzymes, which, besides performing other functions,
regulate the peroxide tone in the cells and control the oxidative stress level. In this review, the essential synthetic
and reactivity aspects of organoselenides are collected and rationalized using the results of accurate
computational studies, which have been carried out mainly in the last two decades. The results obtained in
silico provide a clear explanation of the anti-oxidant activity of organodiselenides and more in general of their
ability to reduce hydroperoxides. At the same time, they are useful to gain insight into some aspects of the enzymatic
activity of the GPx, inspiring novel elements for rational catalyst and drug design.
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Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Universita degli Studi di, Via Marzolo 1, 35131 Padova, Italy
| | - Giovanni Ribaudo
- Dipartimento di Scienze del Farmaco, Universita degli Studi di Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Universita degli Studi di, Via Marzolo 1, 35131 Padova, Italy
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Martakov IS, Shevchenko OG, Torlopov MA, Gerasimov EY, Sitnikov PA. Formation of gallic acid layer on γ-AlOOH nanoparticles surface and their antioxidant and membrane-protective activity. J Inorg Biochem 2019; 199:110782. [PMID: 31362175 DOI: 10.1016/j.jinorgbio.2019.110782] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/11/2019] [Accepted: 07/15/2019] [Indexed: 01/24/2023]
Abstract
In the reported study we prepared gallic acid modified γ-AlOOH nanoparticles. We proposed mechanism of phenolic compounds binding on the alumina, suggesting covalent and electrostatic interactions. Most of the properties of alumina nanoparticles (NPs) are unchanged, but there is partial reduction of surface charge. Prepared samples are colloidally stable hydrosols. It allowed us to perform biological studies on cellular and non-cellular models, which showed nontoxicity of both pure and hybrid γ-AlOOH nanoparticles. Furthermore, pure alumina NPs exhibit antioxidant properties, which are enhanced after gallic acid immobilization on their surface. Also, hybrid alumina-gallic acid NPs showed membrane-protective activity.
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Affiliation(s)
- I S Martakov
- Institute of Chemistry of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, 167000, Syktyvkar, 48 Pervomayskaya St., Russian Federation.
| | - O G Shevchenko
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, 167982 Syktyvkar, 28 Kommunisticheskaya St., Russian Federation
| | - M A Torlopov
- Institute of Chemistry of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, 167000, Syktyvkar, 48 Pervomayskaya St., Russian Federation
| | - E Yu Gerasimov
- Boreskov Institute of Catalysis SB RAS, 5 Lavrentieva Av., 630090 Novosibirsk, Russian Federation
| | - P A Sitnikov
- Institute of Chemistry of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, 167000, Syktyvkar, 48 Pervomayskaya St., Russian Federation
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Altalhi T, Kobeasy MI, Gobouri AA, Al Shehry GA, Aljuhani E, Refat MS. Synthesis of Selenium(0) and Zinc(II) Biomolecules in Nano-Structured Forms as New Antioxidant Agents: Chemical and Biological Studies. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219040261] [Citation(s) in RCA: 2] [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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Ecker A, da Silva RS, Dos Santos MM, Ardisson-Araújo D, Rodrigues OED, da Rocha JBT, Barbosa NV. Safety profile of AZT derivatives: Organoselenium moieties confer different cytotoxic responses in fresh human erythrocytes during in vitro exposures. J Trace Elem Med Biol 2018; 50:240-248. [PMID: 30262286 DOI: 10.1016/j.jtemb.2018.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/12/2018] [Accepted: 07/09/2018] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The incorporation of selenium in the structure of nucleosides is a promising strategy to develop novel therapeutic molecules. OBJECTIVE To assess the toxic effects of three AZT derivatives containing organoselenium moieties on human erythrocytes. METHODOLOGY Freshly human erythrocytes were acutely treated with AZT and selenium derivatives SZ1 (chlorophenylseleno), SZ2 (phenylseleno) and SZ3 (methylphenylseleno) at concentrations ranging from 10 to 500 μM. Afterwards, parameters related to membrane damage, redox dyshomeostasis and eryptosis were determined in the cells. RESULTS The effects of AZT and derivatives toward erythrocytes differed considerably. Overall, the SZ3 exhibited similar effect profiles to the prototypal AZT, without causing cytotoxicity. Contrary, the derivative SZ1 induced hemolysis and increased the membrane fragility of cells. Reactive species generation, lipid peroxidation and thiol depletion were also substantially increased in cells after exposure to SZ1. δ-ALA-D and Na+/K+-ATPase activities were inhibited by derivatives SZ1 and SZ2. Additionally, both derivatives caused eryptosis, promoting cell shrinkage and translocation of phosphatidylserine at the membrane surface. The size and granularity of erythrocytes were not modified by any compound. CONCLUSION The insertion of either chlorophenylseleno or, in a certain way, phenylseleno moietes in the structure of AZT molecule was harmful to erythrocytes and this effect seems to involve a pro-oxidant activity. This was not true for the derivative encompassing methylphenylseleno portion, making it a promising candidate for pharmacological studies.
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Affiliation(s)
- Assis Ecker
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Campus Universitário - Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Rafael S da Silva
- LabSelen-NanoBio - Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Matheus Mulling Dos Santos
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Campus Universitário - Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Daniel Ardisson-Araújo
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Campus Universitário - Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Oscar E D Rodrigues
- LabSelen-NanoBio - Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - João Batista Teixeira da Rocha
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Campus Universitário - Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Nilda Vargas Barbosa
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Campus Universitário - Camobi, 97105-900 Santa Maria, RS, Brazil.
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Shevchenko OG, Plyusnina SN. The role of interspecies differences in the ratio of choline-containing phospholipid fractions of rodent erythrocytes in response of these cells to the effect of membranotropic compounds. J EVOL BIOCHEM PHYS+ 2017. [DOI: 10.1134/s0022093017040068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Tabarelli G, Dornelles L, Iglesias BA, Gonçalves DF, Terra Stefanello S, Soares FAA, Piccoli BC, D'Avila da Silva F, da Rocha JBT, Schultze E, Bonemann Bender C, Collares T, Kömmling Seixas F, Peterle MM, Braga AL, Rodrigues OED. Synthesis and Antitumoral Lung Carcinoma A549 and Antioxidant Activity Assays Of New Chiral β-Aryl-Chalcogenium Azide Compounds. ChemistrySelect 2017. [DOI: 10.1002/slct.201701107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Greice Tabarelli
- LabSelen-NanoBio - Departamento de Química; Universidade Federal de Santa Maria, RS - CEP; 97105-900 - Brazil
| | - Luciano Dornelles
- LabSelen-NanoBio - Departamento de Química; Universidade Federal de Santa Maria, RS - CEP; 97105-900 - Brazil
| | - Bernardo A. Iglesias
- Departamento de Química; Universidade Federal de Santa Maria, RS - CEP; 97105-900 - Brazil
| | - Débora Farina Gonçalves
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - Sílvio Terra Stefanello
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - Félix A. A. Soares
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - Bruna Candia Piccoli
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - Fernanda D'Avila da Silva
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - João B. T. da Rocha
- Departamento de Bioquímica e Biologia MolecularProgramas de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica - PPGBTox Programa de Pós-Graduação em Educação em Ciências: Química da Vida e Saúde - PPGECQVS; Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria, CEP 97105-900 Brazil
| | - Eduarda Schultze
- Programa de Pós-Graduação em Biotecnologia (PPGB); Grupo de Pesquisa em Oncologia Celular e Molecular; Laboratório de Biotecnologia do Câncer; Biotecnologia/Centro de Desenvolvimento Tecnológico; Universidade Federal de Pelotas; Pelotas, RS Brazil
| | - Camila Bonemann Bender
- Programa de Pós-Graduação em Biotecnologia (PPGB); Grupo de Pesquisa em Oncologia Celular e Molecular; Laboratório de Biotecnologia do Câncer; Biotecnologia/Centro de Desenvolvimento Tecnológico; Universidade Federal de Pelotas; Pelotas, RS Brazil
| | - Tiago Collares
- Programa de Pós-Graduação em Biotecnologia (PPGB); Grupo de Pesquisa em Oncologia Celular e Molecular; Laboratório de Biotecnologia do Câncer; Biotecnologia/Centro de Desenvolvimento Tecnológico; Universidade Federal de Pelotas; Pelotas, RS Brazil
| | - Fabiana Kömmling Seixas
- Programa de Pós-Graduação em Biotecnologia (PPGB); Grupo de Pesquisa em Oncologia Celular e Molecular; Laboratório de Biotecnologia do Câncer; Biotecnologia/Centro de Desenvolvimento Tecnológico; Universidade Federal de Pelotas; Pelotas, RS Brazil
| | - Marcos M. Peterle
- Departamento de Química; Universidade Federal de Santa Catarina; Florianópolis Brazil
| | - Antônio L. Braga
- Departamento de Química; Universidade Federal de Santa Catarina; Florianópolis Brazil
| | - Oscar E. D. Rodrigues
- LabSelen-NanoBio - Departamento de Química; Universidade Federal de Santa Maria, RS - CEP; 97105-900 - Brazil
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Vinceti M, Filippini T, Cilloni S, Bargellini A, Vergoni AV, Tsatsakis A, Ferrante M. Health risk assessment of environmental selenium: Emerging evidence and challenges (Review). Mol Med Rep 2017; 15:3323-3335. [PMID: 28339083 PMCID: PMC5428396 DOI: 10.3892/mmr.2017.6377] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/20/2017] [Indexed: 12/22/2022] Open
Abstract
New data have been accumulated in the scientific literature in recent years which allow a more adequate risk assessment of selenium with reference to human health. This new evidence comes from environmental studies, carried out in populations characterized by abnormally high or low selenium intakes, and from high-quality and large randomized controlled trials with selenium recently carried out in the US and in other countries. These trials have consistently shown no beneficial effect on cancer and cardiovascular risk, and have yielded indications of unexpected toxic effects of selenium exposure. Overall, these studies indicate that the minimal amount of environmental selenium which is source of risk to human health is much lower than anticipated on the basis of older studies, since toxic effects were shown at levels of intake as low as around 260 µg/day for organic selenium and around 16 µg/day for inorganic selenium. Conversely, populations with average selenium intake of less than 13–19 µg/day appear to be at risk of a severe cardiomyopathy, Keshan disease. Overall, there is the need to reconsider the selenium standards for dietary intake, drinking water, outdoor and indoor air levels, taking into account the recently discovered adverse health effects of low-dose selenium overexposure, and carefully assessing the significance of selenium-induced proteomic changes.
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Affiliation(s)
- Marco Vinceti
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Tommaso Filippini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Cilloni
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Annalisa Bargellini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Anna Valeria Vergoni
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Aristides Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Heraklion, Crete, Greece
| | - Margherita Ferrante
- Department of Medical, Surgical Sciences and Advanced Technologies 'G.F. Ingrassia', University of Catania, Catania, Italy
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Choimet M, Hyoung-Mi K, Jae-Min O, Tourrette A, Drouet C. Nanomedicine: Interaction of biomimetic apatite colloidal nanoparticles with human blood components. Colloids Surf B Biointerfaces 2016; 145:87-94. [PMID: 27137807 DOI: 10.1016/j.colsurfb.2016.04.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/18/2016] [Accepted: 04/19/2016] [Indexed: 10/21/2022]
Abstract
This contribution investigates the interaction of two types of biomimetic-apatite colloidal nanoparticles (negatively-charged 47nm, and positively-charged 190nm NPs) with blood components, namely red blood cells (RBC) and plasma proteins, with the view to inspect their hemocompatibility. The NPs, preliminarily characterized by XRD, FTIR and DLS, showed low hemolysis ratio (typically lower than 5%) illustrating the high compatibility of such NPs with respect to RBC, even at high concentration (up to 10mg/ml). The presence of glucose as water-soluble matrix for freeze-dried and re-dispersed colloids led to slightly increased hemolysis as compared to glucose-free formulations. NPs/plasma protein interaction was then followed, via non-specific protein fluorescence quenching assays, by contact with whole human blood plasma. The amount of plasma proteins in interaction with the NPs was evaluated experimentally, and the data were fitted with the Hill plot and Stern-Volmer models. In all cases, binding constants of the order of 10(1)-10(2) were found. These values, significantly lower than those reported for other types of nanoparticles or molecular interactions, illustrate the fairly inert character of these colloidal NPs with respect to plasma proteins, which is desirable for circulating injectable suspensions. Results were discussed in relation with particle surface charge and mean particle hydrodynamic diameter (HD). On the basis of these hemocompatibility data, this study significantly complements previous results relative to the development and nontoxicity of biomimetic-apatite-based colloids stabilized by non-drug biocompatible organic molecules, intended for use in nanomedicine.
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Affiliation(s)
- Maëla Choimet
- CIRIMAT, Universite de Toulouse, CNRS, INPT, UPS, Ensiacet, Toulouse, France
| | - Kim Hyoung-Mi
- Nano Bio Materials Laboratory, Dept. Chemistry and Medical Chemistry, Yonsei University, Wonju, South Korea
| | - Oh Jae-Min
- Nano Bio Materials Laboratory, Dept. Chemistry and Medical Chemistry, Yonsei University, Wonju, South Korea.
| | - Audrey Tourrette
- CIRIMAT, Universite de Toulouse, CNRS, INPT, UPS, Ensiacet, Toulouse, France
| | - Christophe Drouet
- CIRIMAT, Universite de Toulouse, CNRS, INPT, UPS, Ensiacet, Toulouse, France.
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Diphenyl ditelluride intoxication triggers histological changes in liver, kidney, and lung of mice. Anal Cell Pathol (Amst) 2015; 2015:784612. [PMID: 26236579 PMCID: PMC4506830 DOI: 10.1155/2015/784612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Accepted: 06/10/2015] [Indexed: 11/18/2022] Open
Abstract
Tellurium compounds may be cytotoxic to different cells types. Thus, this work evaluated the effect of diphenyl ditelluride ((PhTe)2), an organotellurium commonly used in organic synthesis, on the morphology of liver, kidney, and lung. Adult mice were acutely (a subcutaneous single dose: 250 μmol/kg) or subchronically (one daily subcutaneous dose: 10 or 50 μmol/kg for 7 and 14 days) exposed to (PhTe)2. Afterwards, the histological analyses of liver, kidney, and lungs were performed. Liver histology revealed that the hepatocytes of mice subchronically exposed to (PhTe)2 presented cytoplasmic vacuolization, hydropic degeneration, and hyperchromatic nuclei. Subchronic exposure to 50 μmol/kg (PhTe)2 also caused hepatic necrosis. Microvesicular and macrovesicular steatosis were identified in liver of mice acutely exposed to (PhTe)2. Acute and subchronic intoxication with (PhTe)2 induced changes on epithelial cells of renal tubules, namely, loss of brush border and cytoplasmatic vacuolization. Atrophy and hypertrophy, cast proteinaceous formation, and acute tubular necrosis were also identified in renal tissue. Mice subchronically exposed to 50 μmol/kg (PhTe)2 developed intra-alveolar edema and alveolar wall congestion in some areas of lungs. Acute exposure to (PhTe)2 did not cause histological changes in lungs. Our data show that (PhTe)2 may be considered a histotoxic agent for liver, kidney, and lung.
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Hashemian M, Poustchi H, Abnet CC, Boffetta P, Dawsey SM, Brennan PJ, Pharoah P, Etemadi A, Kamangar F, Sharafkhah M, Hekmatdoost A, Malekzadeh R. Dietary intake of minerals and risk of esophageal squamous cell carcinoma: results from the Golestan Cohort Study. Am J Clin Nutr 2015; 102:102-8. [PMID: 26016858 PMCID: PMC4480669 DOI: 10.3945/ajcn.115.107847] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 04/07/2015] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Dietary factors have been hypothesized to affect the risk of esophageal cancer via different mechanisms, but the intake of minerals is understudied and the evidence is conflicting. OBJECTIVE The objective was to evaluate the associations of dietary intake of minerals with risk of esophageal squamous cell carcinoma (ESCC). DESIGN We used data from the Golestan Cohort Study, which was launched in a high-risk region for esophageal cancer in Iran. Participants were enrolled in 2004-2008 and were followed to 2014. Intakes of minerals were assessed with a validated food-frequency questionnaire. A Cox proportional hazards model was used to estimate HRs and 95% CIs of ESCC for dietary intakes of selected minerals. RESULTS We identified 201 ESCC cases among 47,405 subjects. Calcium intake was significantly inversely associated with the risk of ESCC (HR per 100-mg/d increase: 0.88; 95% CI: 0.81, 0.96; P = 0.005; quartile 4 vs. quartile 1 HR: 0.49; 95% CI: 0.29, 0.82; P-trend = 0.013). Zinc intake was also inversely associated with ESCC, but the quartile association did not reach significance (HR per 1-mg/d increase: 0.87; 95% CI: 0.77, 0.98; P = 0.027; quartile 4 vs. quartile 1 HR: 0.56; 95% CI: 0.28, 1.12; P-trend = 0.097). The relations between dietary intakes of selenium, magnesium, and copper and risk of ESCC were nonlinear (P-nonlinear trend = 0.001, 0.016, and 0.029, respectively). There was no relation between dietary intake of manganese and the risk of ESCC. CONCLUSION The results suggest that higher intakes of calcium and zinc are associated with a lower risk of ESCC in a high-risk region of Iran.
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Affiliation(s)
| | | | - Christian C Abnet
- Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | | | - Sanford M Dawsey
- Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Paul J Brennan
- International Agency for Research on Cancer, Lyon, France; and
| | - Paul Pharoah
- Cancer Research UK, Department of Oncology, Cambridge University, Cambridge, United Kingdom
| | - Arash Etemadi
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Farin Kamangar
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | | | - Azita Hekmatdoost
- Departments of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran;
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Vinceti M, Grioni S, Alber D, Consonni D, Malagoli C, Agnoli C, Malavolti M, Pala V, Krogh V, Sieri S. Toenail selenium and risk of type 2 diabetes: the ORDET cohort study. J Trace Elem Med Biol 2015; 29:145-50. [PMID: 25169979 DOI: 10.1016/j.jtemb.2014.07.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 07/16/2014] [Accepted: 07/21/2014] [Indexed: 12/20/2022]
Abstract
Epidemiologic studies, particularly randomized controlled trials, have shown a direct relation between dietary and environmental exposure to the metalloid selenium and risk of type 2 diabetes. We investigated the association between baseline toenail selenium levels and diabetes occurrence in a case-control study nested in ORDET, a population-based female cohort in Northern Italy. After a median follow-up of 16 years, we identified 226 cases of type 2 diabetes cases and 395 age-matched control women with available toenail samples at baseline. The multivariate odds ratios of diabetes in increasing a priori defined categories of toenail selenium exposure were 1.09 (95% confidence interval 0.61, 1.96), 0.71 (0.38, 1.34) and 1.14 (0.46, 2.80) compared with the lowest category. The results were not substantially altered when quartile distribution of toenail selenium in controls was used to define exposure categories. Spline regression analysis did not show homogeneous risk trends. Overall, we did not find an association between toenail selenium and subsequent development of diabetes. Since the diabetogenic activity of selenium is strongly supported by experimental studies and some observational investigations, our null results might be explained by the limitations of overall selenium toenail content to assess environmental exposure to selenium species of etiologic relevance in the study population.
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Affiliation(s)
- Marco Vinceti
- Centro di Ricerca in Epidemiologia Ambientale, Genetica e Nutrizionale (CREAGEN), University of Modena and Reggio Emilia, Modena, Via Campi, 287, 41125 Modena, Italy.
| | - Sara Grioni
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milano, Italy
| | - Dorothea Alber
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Dario Consonni
- Epidemiology Unit, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Via San Barnaba, 8, 20122 Milan, Italy
| | - Carlotta Malagoli
- Centro di Ricerca in Epidemiologia Ambientale, Genetica e Nutrizionale (CREAGEN), University of Modena and Reggio Emilia, Modena, Via Campi, 287, 41125 Modena, Italy
| | - Claudia Agnoli
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milano, Italy
| | - Marcella Malavolti
- Centro di Ricerca in Epidemiologia Ambientale, Genetica e Nutrizionale (CREAGEN), University of Modena and Reggio Emilia, Modena, Via Campi, 287, 41125 Modena, Italy
| | - Valeria Pala
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milano, Italy
| | - Vittorio Krogh
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milano, Italy
| | - Sabina Sieri
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milano, Italy
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Jorge PM, de Oliveira IM, Filippi Chiela EC, Viau CM, Saffi J, Horn F, Rosa RM, Guecheva TN, Pêgas Henriques JA. Diphenyl Ditelluride-Induced Cell Cycle Arrest and Apoptosis: A Relation with Topoisomerase I Inhibition. Basic Clin Pharmacol Toxicol 2014; 116:273-80. [DOI: 10.1111/bcpt.12315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 08/18/2014] [Indexed: 12/19/2022]
Affiliation(s)
- Patrícia M. Jorge
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
| | - Iuri M. de Oliveira
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
| | | | - Cassiana M. Viau
- Department of Basic Health Sciences; Federal University of Health Sciences of Porto Alegre (UFCSPA); Porto Alegre RS Brazil
| | - Jenifer Saffi
- Department of Basic Health Sciences; Federal University of Health Sciences of Porto Alegre (UFCSPA); Porto Alegre RS Brazil
| | - Fabiana Horn
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
| | - Renato M. Rosa
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
| | - Temenouga N. Guecheva
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
| | - João A. Pêgas Henriques
- Department of Biophysics; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
- Biotecnology Institute; University of Caxias do Sul (UCS); Caxias do Sul RS Brazil
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17
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Reis de Sá LF, Toledo FT, de Sousa BA, Gonçalves AC, Tessis AC, Wendler EP, Comasseto JV, Dos Santos AA, Ferreira-Pereira A. Synthetic organotelluride compounds induce the reversal of Pdr5p mediated fluconazole resistance in Saccharomyces cerevisiae. BMC Microbiol 2014; 14:201. [PMID: 25062749 PMCID: PMC4222501 DOI: 10.1186/s12866-014-0201-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 07/18/2014] [Indexed: 12/22/2022] Open
Abstract
Background Resistance to fluconazole, a commonly used azole antifungal, is a challenge for the treatment of fungal infections. Resistance can be mediated by overexpression of ABC transporters, which promote drug efflux that requires ATP hydrolysis. The Pdr5p ABC transporter of Saccharomyces cerevisiae is a well-known model used to study this mechanism of antifungal resistance. The present study investigated the effects of 13 synthetic compounds on Pdr5p. Results Among the tested compounds, four contained a tellurium-butane group and shared structural similarities that were absent in the other tested compounds: a lateral hydrocarbon chain and an amide group. These four compounds were capable of inhibiting Pdr5p ATPase activity by more than 90%, they demonstrated IC50 values less than 2 μM and had an uncompetitive pattern of Pdr5p ATPase activity inhibition. These organotellurides did not demonstrate cytotoxicity against human erythrocytes or S. cerevisiae mutant strains (a strain that overexpress Pdr5p and a null mutant strain) even in concentrations above 100 μM. When tested at 100 μM, they could reverse the fluconazole resistance expressed by both the S. cerevisiae mutant strain that overexpress Pdr5p and a clinical isolate of Candida albicans. Conclusions We have identified four organotellurides that are promising candidates for the reversal of drug resistance mediated by drug efflux pumps. These molecules will act as scaffolds for the development of more efficient and effective efflux pump inhibitors that can be used in combination therapy with available antifungals.
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Affiliation(s)
| | | | | | | | | | | | | | - Alcindo A Dos Santos
- Instituto de Microbiologia Paulo de Góes, Departamento de Microbiologia Geral, Laboratório de Bioquímica Microbiana, CCS, Universidade Federal do Rio de Janeiro, Rio de Janeiro/RJ, Brazil.
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Refat MS, Kobeasy MI, EL-Shazly MA. Synthesis, spectroscopic, and molar conductance characterization of selenium(IV) vitamin B6 complex as prospective antioxidant agent. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363214070299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Signaling mechanisms and disrupted cytoskeleton in the diphenyl ditelluride neurotoxicity. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:458601. [PMID: 25050142 PMCID: PMC4090446 DOI: 10.1155/2014/458601] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 02/26/2014] [Indexed: 01/14/2023]
Abstract
Evidence from our group supports that diphenyl ditelluride (PhTe)2 neurotoxicity depends on modulation of signaling pathways initiated at the plasma membrane. The (PhTe)2-evoked signal is transduced downstream of voltage-dependent Ca2+ channels (VDCC), N-methyl-D-aspartate receptors (NMDA), or metabotropic glutamate receptors activation via different kinase pathways (protein kinase A, phospholipase C/protein kinase C, mitogen-activated protein kinases (MAPKs), and Akt signaling pathway). Among the most relevant cues of misregulated signaling mechanisms evoked by (PhTe)2 is the cytoskeleton of neural cells. The in vivo and in vitro exposure to (PhTe)2 induce hyperphosphorylation/hypophosphorylation of neuronal and glial intermediate filament (IF) proteins (neurofilaments and glial fibrillary acidic protein, resp.) in different brain structures of young rats. Phosphorylation of IFs at specific sites modulates their association/disassociation and interferes with important physiological roles, such as axonal transport. Disrupted cytoskeleton is a crucial marker of neurodegeneration and is associated with reactive astrogliosis and apoptotic cell death. This review focuses the current knowledge and important results on the mechanisms of (PhTe)2 neurotoxicity with special emphasis on the cytoskeletal proteins and their differential regulation by kinases/phosphatases and Ca2+-mediated mechanisms in developmental rat brain. We propose that the disrupted cytoskeletal homeostasis could support brain damage provoked by this neurotoxicant.
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Structure-activity relationship of benzophenanthridine alkaloids from Zanthoxylum rhoifolium having antimicrobial activity. PLoS One 2014; 9:e97000. [PMID: 24824737 PMCID: PMC4019524 DOI: 10.1371/journal.pone.0097000] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 04/15/2014] [Indexed: 11/19/2022] Open
Abstract
Zanthoxylum rhoifolium (Rutaceae) is a plant alkaloid that grows in South America and has been used in Brazilian traditional medicine for the treatment of different health problems. The present study was designed to evaluate the antimicrobial activity of the steam bark crude methanol extract, fractions, and pure alkaloids of Z. rhoifolium. Its stem bark extracts exhibited a broad spectrum of antimicrobial activity, ranging from 12.5 to 100 µg/mL using bioautography method, and from 125 to 500 µg/mL in the microdilution bioassay. From the dichloromethane basic fraction, three furoquinoline alkaloids (1-3), and nine benzophenanthridine alkaloids (4-12) were isolated and the antimicrobial activity of the benzophenanthridine alkaloids is discussed in terms of structure-activity relationships. The alkaloid with the widest spectrum of activity was chelerythrine (10), followed by avicine (12) and dihydrochelerythrine (4). The minimal inhibitory concentrations of chelerythrine, of 1.50 µg/mL for all bacteria tested, and between 3.12 and 6.25 µg/mL for the yeast tested, show this compound to be a more powerful antimicrobial agent when compared with the other active alkaloids isolated from Z. rhoifolium. To verify the potential importance of the methylenedioxy group (ring A) of these alkaloids, chelerythrine was selected to represent the remainder of the benzophenanthridine alkaloids isolated in this work and was subjected to a demethylation reaction giving derivative 14. Compared to chelerythrine, the derivative (14) was less active against the tested bacteria and fungi. Kinetic measurements of the bacteriolytic activities of chelerythrine against the bacteria Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) were determined by optical density based on real time assay, suggesting that its mechanism of action is not bacteriolytic. The present study did not detect hemolytic effects of chelerythrine on erythrocytes and found a protective effect considering the decrease in TBARS and AOPP (advanced oxidized protein products) levels when compared to the control group.
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Schiar VPP, dos Santos DB, Duarte MMMF, Vargas F, Ribeiro MCP, Nogueira CW, Zeni G, Hassan W, da Rocha JBT. An in vivo insight to the toxicological profile of various organotellurides. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 36:813-818. [PMID: 23958975 DOI: 10.1016/j.etap.2013.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Accepted: 07/01/2013] [Indexed: 06/02/2023]
Abstract
In this study we have examined the in vivo toxic effects of various organochalcogens on hepatic, renal, glycemic and lipid profile. Diorganotellurium dichloride phosphonate (C1) at all tested doses did not modify serum alanine aminotransferase (ALT) activity in mice. While, 2-butyltellurium furan (C2) and dinaphthalene ditelluride (C3) at a dose of 0.75 and 0.125 mmol/kg caused an increase in aspartate aminotransferase (AST) and ALT activities. Our data showed that C1 caused an increase in urea content at different doses while treatment with C2 and C3 did not modify urea content. Treatment with C2 caused a significant alteration in serum glucose and fructosamine levels which explains the possible toxicity of these compounds. No significant changes were observed for cholesterol and triglycerides levels. These results suggest that organochalcogen compounds presented liver and renal toxicity and also altered glycemic profile which may leads to various clinical complications.
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Affiliation(s)
- Viviane Patrícia P Schiar
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
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22
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Meinerz DF, Comparsi B, Allebrandt J, Mariano DOC, Dos Santos DB, Zemolin APP, Farina M, Dafre LA, Rocha JBT, Posser T, Franco JL. Sub-acute administration of (S)-dimethyl 2-(3-(phenyltellanyl) propanamido) succinate induces toxicity and oxidative stress in mice: unexpected effects of N-acetylcysteine. SPRINGERPLUS 2013; 2:182. [PMID: 23658858 PMCID: PMC3644195 DOI: 10.1186/2193-1801-2-182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 04/16/2013] [Indexed: 12/21/2022]
Abstract
The organic tellurium compound (S)-dimethyl 2-(3-(phenyltellanyl) propanamide) succinate (TeAsp) exhibits thiol-peroxidase activity that could potentially offer protection against oxidative stress. However, data from the literature show that tellurium is a toxic agent to rodents. In order to mitigate such toxicity, N-acetylcysteine (NAC) was administered in parallel with TeAsp during 10 days. Mice were separated into four groups receiving daily injections of (A) vehicle (PBS 2.5 ml/kg, i.p. and DMSO 1 ml/kg, s.c.), (B) NAC (100 mg/kg, i.p. and DMSO s.c.), (C) PBS i.p. and TeAsp (92.5 μmol/kg, s.c), or (D) NAC plus TeAsp. TeAsp treatment started on the fourth day. Vehicle or NAC-treated animals showed an increase in body weight whereas TeAsp caused a significant reduction. Contrary to expected, NAC co-administration potentiated the toxic effect of TeAsp, causing a decrease in body weight. Vehicle, NAC or TeAsp did not affect the exploratory and motor activity in the open-field test at the end of the treatment, while the combination of NAC and TeAsp produced a significant decrease in these parameters. No DNA damage or alterations in cell viability were observed in leukocytes of treated animals. Treatments produced no or minor effects on the activities of antioxidant enzymes catalase, glutathione peroxidase and glutathione reductase, whereas the activity of the thioredoxin reductase was decreased in the brain and increased the liver of the animals in the groups receiving TeAsp or TeAsp plus NAC. In conclusion, the toxicity of TeAsp was potentiated by NAC and oxidative stress appears to play a central role in this process.
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Affiliation(s)
- Daiane F Meinerz
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS CEP 97105-900 Brazil
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Harisa GI, Abo-Salem OM, El-sayed ESM, Shazly G. Effects of nutritional and excessive levels of selenium on red blood cells of rats fed a high cholesterol diet. Biol Trace Elem Res 2013; 152:41-9. [PMID: 23292318 DOI: 10.1007/s12011-012-9588-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
Abstract
In this study, we investigated the effects of selenium (Se) on the properties of erythrocytes and atherogenic index in the presence and absence of high cholesterol diet (HCD). The effect of selected two different doses (1 μg and 50 μg Se/kg/body weight) on HCD-induced oxidative stress was investigated. The hemolysis of the erythrocytes of the HCD rats as well as by high levels of selenium or their combination was markedly increased. Likewise, atherogenic index and plasma glutathione peroxidase (GPx) activity were significantly increased in the same groups of rats compared to control ones. In contrast, paraoxonase activity, glutathione levels and protein thiol levels, catalase, GPx, and superoxide dismutase activities were significantly decreased in rats that received the HCD, high selenium dose, or their combination. Malondialdehyde and protein carbonyl levels in the plasma and red blood cells were significantly increased by HCD and high selenium dose administration. Co-administration of selenium at low dose with or without an HCD restored all of the investigated parameters to near-normal values. The results of this study suggest that excess selenium administration with HCD worsens the atherogenic index and enhances formation of oxidized red blood cells. At dosage levels in the nutritional range such as 1 μg Se/kg body weight, selenium ameliorates the atherogenic index and preserves the antioxidant capacity of the erythrocytes.
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Affiliation(s)
- Gamaleldin I Harisa
- Department of Pharmaceutics, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia.
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24
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Vij P, Hardej D. Evaluation of tellurium toxicity in transformed and non-transformed human colon cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:768-782. [PMID: 23068156 DOI: 10.1016/j.etap.2012.09.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Accepted: 09/08/2012] [Indexed: 06/01/2023]
Abstract
Diphenyl ditelluride (DPDT) and tellurium tetrachloride (TeCl(4)) were evaluated for toxicity in transformed (HT-29, Caco-2) and non-transformed colon cells (CCD-18Co). Significant decreases in viability were observed with DPDT exposure in HT-29 (62.5-1000 μM), Caco-2 (31.25-1000 μM) and CCD-18Co cells (500-1000 μM) and with TeCl(4) in HT-29 (31.25-1000 μM), Caco-2 (31.25-1000 μM) and CCD-18Co cells (500-1000 μM). Light microscopy confirmed viability analysis. Significant increases in caspase 3/7 and 9 activity were observed with DPDT in HT-29 (500-1000 μM) and CCD-18Co cells (1000 μM) indicating apoptosis. No significant increases in caspases were seen with TeCl(4) indicating necrosis. Apoptosis or necrosis was confirmed with fluorescent staining (FITC-Annexin, Hoechst 33342 and Ethidium Homodimer). Significant decreases in GSH/GSSG ratio were observed with DPDT in HT-29 (62.5-1000 μM), and CCD-18Co cells (1000 μM) and with TeCl(4) in HT-29 (62.5-1000 μM) and CCD-18Co cells (250-1000 μM). We concluded that cells treated with DPDT resulted in apoptosis and TeCl(4) treatment in necrosis. GSH/GSSG ratio shifts indicate oxidative mechanisms are involved.
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Affiliation(s)
- Puneet Vij
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St John's University, Queens, NY 11439, USA
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25
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Sabir SM, Salman SM, Rocha JBT. Antioxidant properties of β-seleno amines against lipid peroxidation in rat brain and liver. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:446-453. [PMID: 22797322 DOI: 10.1016/j.etap.2012.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 06/13/2012] [Accepted: 06/16/2012] [Indexed: 06/01/2023]
Abstract
β-Seleno amines were screened for in vitro antioxidant activity. The compounds (C1-C4) were tested against lipid peroxidation induced by iron and sodium nitroprusside in rat brain and liver homogenates. The compounds showed inhibition against thiobarbituric acid reactive species (TBARS) induced by different pro-oxidants (10μM FeSO(4) and 5μM sodium nitroprusside (SNP) in rat brain and liver homogenates. The compounds exhibited strong antioxidant activity in 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and phosphomolybdenum assays. The IC(50) values revealed that the β-seleno amines in which the amino group was protected with protecting groups tert-butyloxycarbonyl (Boc) and Tosyl (Ts) groups showed better antioxidant profiles compared to the free monoselenides. The total antioxidant activity of C1, C2, C3 and C4 were found to be 85.2±11.5, 114±7.9, 138±8.5, 125.81±5.2μM/ml of ascorbic acid respectively. Therefore, these compounds may be used as synthetic antioxidants.
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Affiliation(s)
- S M Sabir
- Department of Eastern Medicine and Surgery, University of the Pooch Rawalakot Azad Kashmir Pakistan.
| | - Syed M Salman
- Department of Chemistry, Abdul Wali Khan University Mardan, Khyber pakhtunkhwa, Pakistan
| | - J B T Rocha
- Departmento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900, Brazil
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26
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de Andrade RB, Gemelli T, Guerra RB, Funchal C, Wannmacher CMD. Kinetic studies on the inhibition of creatine kinase activity by 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one in the cerebral cortex of rats. Food Chem Toxicol 2012; 50:3468-74. [PMID: 22884765 DOI: 10.1016/j.fct.2012.07.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/21/2012] [Accepted: 07/24/2012] [Indexed: 01/05/2023]
Abstract
Tellurium has been used as an industrial component of many alloys and in the electronic industry. Organotellurium compounds can cause poisoning which leads to neurotoxic symptoms such as significant impairment of learning, spatial memory and are potentially neurotoxic to human beings. However, the molecular mechanisms of neurotoxicity of organotellurium compounds are not well understood. Considering that creatine kinase plays a key role in energy metabolism of tissues with intermittently high and fluctuating energy requirements, such as nervous tissue, the main objective of this study was to investigate the mechanisms by which 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one inhibit creatine kinase activity, a key enzyme of energy homeostasis, in the cerebral cortex of 30-day-old Wistar rats. For the kinetic studies, the Lineweaver-Burk plot was used to characterize the mechanisms of enzyme inhibition by 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one. The results suggested that this compound inhibits creatine kinase activity by two different mechanisms: competition with ADP and oxidation of critical sulfhydryl groups for the functioning of the enzyme. The potential for inhibition of creatine kinase to occur in vivo may contribute to the neurotoxicity observed by this organochaocogen.
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Affiliation(s)
- Rodrigo Binkowski de Andrade
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90035-003 Porto Alegre, RS, Brazil
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27
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Santos Lacerda D, Oliveira Castro V, Mascarenhas M, Guerra RB, Dani C, Coitinho A, Gomez R, Funchal C. Acute administration of the organochalcogen 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one induces biochemical and hematological disorders in male rats. Cell Biochem Funct 2012; 30:315-9. [DOI: 10.1002/cbf.2806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 11/12/2011] [Accepted: 01/03/2012] [Indexed: 12/29/2022]
Affiliation(s)
| | | | | | - Robson Brum Guerra
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul; Sertão; Rio Grande do Sul; Brazil
| | - Caroline Dani
- Centro Universitário Metodista IPA; Porto Alegre; Rio Grande do Sul; Brazil
| | - Adriana Coitinho
- Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; Rio Grande do Sul; Brazil
| | - Rosane Gomez
- Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre; Rio Grande do Sul; Brazil
| | - Cláudia Funchal
- Centro Universitário Metodista IPA; Porto Alegre; Rio Grande do Sul; Brazil
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28
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Llerena F, Maynar M, Barrientos G, Palomo R, Robles MC, Caballero MJ. Comparison of urine toxic metals concentrations in athletes and in sedentary subjects living in the same area of Extremadura (Spain). Eur J Appl Physiol 2011; 112:3027-31. [PMID: 22179857 DOI: 10.1007/s00421-011-2276-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Accepted: 12/02/2011] [Indexed: 10/14/2022]
Abstract
Cadmium (Cd), tungsten (W), tellurium (Te), beryllium (Be), and lead (Pb), are non-essential metals pervasive in the human environment. Studies on athletes during training periods compared to non-training control subjects, indicate increased loss of minerals through sweat and urine. The aim of this study was to compare the level of these trace elements, determined by inductively coupled plasma mass spectrometry (ICP-MS) in urine samples, between athletes and age-matched sedentary subjects living in the same geographical area, although anthropometric and cardiovascular measurements showed that athletes have significantly (P ≤ 0.001) lower BMI, body fat and heart rate, whereas the muscle and bone percentage was significantly (P ≤ 0.001) higher than in sedentary subjects. The validity of the methodology was checked by the biological certified reference material. Trace element analysis concentrations, expressed in μg/mg creatinine, of five toxic elements in urine from athletes (n = 21) versus sedentary subjects, (n = 26) were as follows: Cd (0.123 ± 0.075 vs. 0.069 ± 0.041, P ≤ 0.05); W (0.082 ± 0.053 vs. < limit of detection); Te (0.244 ± 0.193 vs. 0.066 ± 0.045, P ≤ 0.001), Be (0.536 ± 0.244 vs. 0.066 ± 0.035, P ≤ 0.001); Pb (0.938 ± 0.664 vs. 2.162 ± 1.444 P ≤ 0.001). With the exception of Pb, urine toxic metal concentrations from athletes were higher than from sedentary subjects. This fact suggests that physical activity counteracts, at least in part, the cumulative effect of toxic environment by increasing the urine excretion of toxic metals in trained people.
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Affiliation(s)
- F Llerena
- Department of Medical-Surgical Therapeutics, School of Medicine, University of Extremadura, Badajoz, Cáceres, Spain
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29
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Toxicology and pharmacology of selenium: emphasis on synthetic organoselenium compounds. Arch Toxicol 2011; 85:1313-59. [DOI: 10.1007/s00204-011-0720-3] [Citation(s) in RCA: 330] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 05/18/2011] [Indexed: 02/07/2023]
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30
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Stranges S, Navas-Acien A, Rayman MP, Guallar E. Selenium status and cardiometabolic health: state of the evidence. Nutr Metab Cardiovasc Dis 2010; 20:754-760. [PMID: 21094028 DOI: 10.1016/j.numecd.2010.10.001] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 10/07/2010] [Indexed: 02/07/2023]
Abstract
Use of selenium enriched foods, supplements and fertilizers has increased markedly in recent years in the US and other Western countries because of the perception that the anti-oxidant properties of selenium could potentially reduce the risk of cancer and other chronic diseases. However, concern has been raised recently about possible adverse cardiometabolic effects of high selenium exposure, including an increased risk of diabetes and hyperlipidemia with high selenium intake. Hence, from a public health perspective, the relationship between selenium status and cardiometabolic health should be clarified in order to help guide consumers in their choices of nutritional supplements and enriched food products. Additional experimental evidence is needed to provide new insights into the role of selenium and of specific selenoproteins in human biology, especially to clarify the underlying mechanisms linking selenium to chronic disease endpoints. Further epidemiological studies and randomized clinical trials across populations with different selenium status should be conducted to determine the causal effect of selenium on cardiovascular disease and risk factors. Nevertheless, at the present time the widespread use of selenium supplements or other strategies that artificially increase selenium status above the level required for optimal selenoprotein activity is not justified and should not be encouraged.
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Affiliation(s)
- S Stranges
- Health Sciences Research Institute, University of Warwick Medical School, Coventry, UK.
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Puntel RL, Roos DH, Folmer V, Nogueira CW, Galina A, Aschner M, Rocha JBT. Mitochondrial dysfunction induced by different organochalchogens is mediated by thiol oxidation and is not dependent of the classical mitochondrial permeability transition pore opening. Toxicol Sci 2010; 117:133-43. [PMID: 20573786 DOI: 10.1093/toxsci/kfq185] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ebselen (Ebs) and diphenyl diselenide [(PhSe)(2)] readily oxidize thiol groups. Here we studied mitochondrial swelling changes in mitochondrial potential (Deltapsim), NAD(P)H oxidation, reactive oxygen species production, protein aggregate formation, and oxygen consumption as ending points of their in vitro toxicity. Specifically, we tested the hypothesis that organochalchogens toxicity could be associated with mitochondrial dysfunction via oxidation of vicinal thiol groups that are known to be involved in the regulation of mitochondrial permeability (Petronilli et al. J. Biol. Chem., 269; 16638; 1994). Furthermore, we investigated the possible mechanism(s) by which these organochalchogens could disrupt liver mitochondrial function. Ebs and (PhSe)(2) caused mitochondrial depolarization and swelling in a concentration-dependent manner. Furthermore, both organochalchogens caused rapid oxidation of the mitochondrial pyridine nucleotides (NAD(P)H) pool, likely reflecting the consequence and not the cause of increased mitochondrial permeability (Costantini, P., Chernyak, B. V., Petronilli, V., and Bernardi, P. (1996). Modulation of the mitochondrial permeability transition pore (PTP) by pyridine nucleotides and dithiol oxidation at two separate sites. J. Biol. Chem. 271, 6746-6751). The organochalchogens-induced mitochondrial dysfunction was prevented by the reducing agent dithiothreitol (DTT). Ebs- and (PhSe)(2)-induced mitochondrial depolarization and swelling were unchanged by ruthenium red (4microM), butylated hydroxytoluene (2.5microM), or cyclosporine A (1microM). N-ethylmaleimide enhanced the organochalchogens-induced mitochondrial depolarization, without affecting the magnitude of the swelling response. In contrast, iodoacetic acid did not modify the effects of Ebs or (PhSe)(2) on the mitochondria. Additionally, Ebs and (PhSe)(2) decreased the basal 2' 7' dichlorofluorescin diacetate (H(2)-DCFDA) oxidation and oxygen consumption rate in state 3 and increased it during the state 4 of oxidative phosphorylation and induced the formation of protein aggregates, which were prevented by DTT. However, DTT failed to reverse the formation of protein aggregates, when it was added after a preincubation of liver mitochondria with Ebs or (PhSe)(2). Similarly, DTT did not reverse the Ebs- or (PhSe)(2)-induced Deltapsim collapse or swelling, when it was added after a preincubation period of mitochondria with chalcogenides. These results show that Ebs and (PhSe)(2) can effectively induce mitochondrial dysfunction and suggest that effects of these compounds are associated with mitochondrial thiol groups oxidation. The inability of cyclosporine A to reverse the Ebs- and (PhSe)(2)-induced mitochondrial effects suggests that the redox-regulated mitochondrial permeability transition (MPT) pore was mechanistically regulated in a manner that is distinct from the classical MPT pore.
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Affiliation(s)
- Robson L Puntel
- Universidade Federal do Pampa, Uruguaiana, Rio Grande do Sul, Brazil
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32
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Meinerz DF, Sudati JH, dos Santos DB, Frediani A, Alberto EE, Allebrandt J, Franco JL, Barbosa NBV, Aschner M, da Rocha JBT. Evaluation of the biological effects of (S)-dimethyl 2-(3-(phenyltellanyl) propanamido) succinate, a new telluroamino acid derivative of aspartic acid. Arch Toxicol 2010; 85:43-9. [DOI: 10.1007/s00204-010-0555-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Accepted: 05/04/2010] [Indexed: 12/31/2022]
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Rosseti IB, Wagner C, Fachinetto R, Taube Junior P, Costa MS. Candida albicans growth and germ tube formation can be inhibited by simple diphenyl diselenides [(PhSe)2, (MeOPhSe)2, (p-Cl-PhSe)2, (F3CPhSe)2] and diphenyl ditelluride. Mycoses 2010; 54:506-13. [DOI: 10.1111/j.1439-0507.2010.01888.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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34
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Degrandi TH, de Oliveira IM, d'Almeida GS, Garcia CRL, Villela IV, Guecheva TN, Rosa RM, Henriques JAP. Evaluation of the cytotoxicity, genotoxicity and mutagenicity of diphenyl ditelluride in several biological models. Mutagenesis 2010; 25:257-69. [DOI: 10.1093/mutage/geq002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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35
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Santos D, Schiar V, Paixão M, Meinerz D, Nogueira C, Aschner M, Rocha J, Barbosa N. Hemolytic and genotoxic evaluation of organochalcogens in human blood cells in vitro. Toxicol In Vitro 2009; 23:1195-204. [DOI: 10.1016/j.tiv.2009.05.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 04/24/2009] [Accepted: 05/20/2009] [Indexed: 12/21/2022]
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Vinceti M, Maraldi T, Bergomi M, Malagoli C. Risk of chronic low-dose selenium overexposure in humans: insights from epidemiology and biochemistry. REVIEWS ON ENVIRONMENTAL HEALTH 2009; 24:231-248. [PMID: 19891121 DOI: 10.1515/reveh.2009.24.3.231] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The latest developments of epidemiologic and biochemical research suggest that current upper limits of intake for dietary selenium and for overall selenium exposure may be inadequate to protect human health. In particular, recent experimental and observational prospective studies indicate a diabetogenic effect of selenium at unexpectedly low levels of intake. Experimental evidence from laboratory studies and veterinary medicine appears to confirm previous epidemiologic observations that selenium overexposure is associated with an increased risk of amyotrophic lateral sclerosis, and a recent large trial indicated no beneficial effect in preventing prostate cancer. Moreover, the pro-oxidant properties of selenium species and the observation that the selenium-containing enzymes glutathione peroxidases are induced by oxidative stress imply that the increase in enzymatic activity induced by this metalloid may represent at least in part a compensatory response. Taken together, the data indicate that the upper safe limit of organic and inorganic selenium intake in humans may be lower than has been thought and that low-dose chronic overexposure to selenium may be considerably more widespread than supposed.
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Affiliation(s)
- Marco Vinceti
- CREAGEN-Environmental, Genetic & Nutritional Epidemiology Research Center, Department of Public Health Sciences, University of Modena and Reggio Emilia, Modena, Italy.
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