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Tripathi A, Khan A, Srivastava R. Synthesis and screening for anticancer activity of two novel telluro-amino acids: 1,3-Tellurazolidine-4-carboxylic acid and tellurohomocystine. Amino Acids 2023; 55:1361-1370. [PMID: 37796355 DOI: 10.1007/s00726-023-03314-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/03/2023] [Indexed: 10/06/2023]
Abstract
Tellurium (Te) containing amino acids and their derivatives have the potential to participate in biological processes, which are currently being studied extensively to understand the function of Te in biological and pharmacological activities. Here, we are reporting the synthesis of two novel Te-containing unnatural amino acids; 1,3-Tellurazolidine-4-carboxylic acid [Te{CH2CH(COOH)NHCH2}] 5, and 4,4'-(1,2-Ditellurdiyl)bis(2-aminobutanoic acid), i.e., tellurohomocystine [TeCH2CH2CH(NH2)COOH]2 7, synthesized from tellurocystine, and L-methionine as precursors, respectively. These telluro-amino acids were thoroughly characterized by multinuclear (1H, 13C, 125Te) NMR spectroscopy, high-resolution ESI-mass spectrometry (ESI-MS), and elemental analysis. The telluro-amino acids 5 and 7 demonstrated good biocompatibility when in vitro cytotoxicity was analyzed on two fibroblast cell lines L929 and NIH/3T3. The treatment of telluro-amino acids 1,3-Tellurazolidine-4-carboxylic acid 5 and tellurohomocystine 7 on breast cancer cell line MCF-7 showed anticancer activity with IC50 values of 7.29 ± 0.27 µg/mL and 25.36 ± 0.12 µg/mL, respectively. The cell cycle distribution studies also revealed arrest at the sub-G1 phase suggesting telluro-amino acids to be apoptotic.
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Affiliation(s)
- Abhishek Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Amreen Khan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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2
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Tripathi A, Khan A, Kiran P, Shetty H, Srivastava R. Screening of AS101 analog, organotellurolate (IV) compound 2 for its in vitro biocompatibility, anticancer, and antibacterial activities. Amino Acids 2023:10.1007/s00726-023-03280-7. [PMID: 37227510 DOI: 10.1007/s00726-023-03280-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/10/2023] [Indexed: 05/26/2023]
Abstract
Organotellurium compounds are being well researched as potential candidates for their functional roles in therapeutic and clinical biology. Here, we report the in vitro anticancer and antibacterial activities of an AS101 analog, cyclic zwitterionic organotellurolate (IV) compound 2 [Te-{CH2CH(NH3+)COO}(Cl)3]. Different concentrations of compound 2 were exposed to fibroblast L929 and breast cancer MCF-7 cell lines to study its effect on cell viability. The fibroblast cells with good viability confirmed the biocompatibility, and compound 2 also was less hemolytic on RBCs. A cytotoxic effect on MCF-7 breast cancer cell line investigated compound 2 to be anti-cancerous with IC50 value of 2.86 ± 0.02 µg/mL. The apoptosis was confirmed through the cell cycle phase arrest of the organotellurolate (IV) compound 2. Examination of the antibacterial potency compound 2 was done based on the agar disk diffusion, minimum inhibitory concentration, and time-dependent assay for the Gram-positive Bacillus subtilis and Gram-negative Pseudomonas putida. For both bacterial strains, tests were performed with the concentration range of 3.9-500 μg/mL, and the minimum inhibition concentration value was found to be 125 μg/mL. The time-dependent assay suggested the bactericidal activity of organotellurolate (IV) compound, 2 against the bacterial strains.
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Affiliation(s)
- Abhishek Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Amreen Khan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Pallavi Kiran
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Harsha Shetty
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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3
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Tripathi A, Deka R, Butcher RJ, Turner DR, Deacon GB, Singh HB. Exploring the reactivity of L-tellurocystine, Te-protected tellurocysteine conjugates and diorganodiselenides towards hydrogen peroxide: synthesis and molecular structure analysis. NEW J CHEM 2022. [DOI: 10.1039/d2nj00997h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a series of novel organotellurium species and diorganoselenones is reported.
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Affiliation(s)
- Abhishek Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
- IITB-Monash Research Academy, Powai, Mumbai 400076, India
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Rajesh Deka
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
- IITB-Monash Research Academy, Powai, Mumbai 400076, India
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Ray J. Butcher
- Department of Chemistry, Howard University, Washington, D. C. 20059, USA
| | - David R. Turner
- IITB-Monash Research Academy, Powai, Mumbai 400076, India
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Glen B. Deacon
- IITB-Monash Research Academy, Powai, Mumbai 400076, India
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Harkesh B. Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
- IITB-Monash Research Academy, Powai, Mumbai 400076, India
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4
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Kundu D, Roy A, Panja S. Transition Metal Catalyst, Solvent, Base Free Synthesis of Diaryl Diselenides under Mechanical Ball Milling. Curr Org Synth 2021; 19:COS-EPUB-119687. [PMID: 34951576 DOI: 10.2174/1570179419666211224144932] [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: 08/17/2021] [Revised: 10/16/2021] [Accepted: 11/15/2021] [Indexed: 11/22/2022]
Abstract
A convenient, efficient, and general procedure for the synthesis of diaryl diselenides has been developed by the reaction of aryl diazonium tetrafluoroborates and Potassium Selenocyanate on the surface of alumina under ball-milling in absence of any solvent, transition metal catalyst and base in room temperature. A wide range of functionalized diaryl diselenides are obtained in high purity and high yield by this procedure. BACKGROUND Synthesis of diaryl diselenides was restricted into only few Cu-catalyzed C-Se Cross coupling protocol where use of ligands, high reaction temp, long reaction time were required. OBJECTIVE To achieve a sustainable protocol for the synthesis of diaryl diselenides Method: Reaction of aryl diazonium fluoroborate with KSeCN was successfully performed under ball milling in absence of any ransition metal catalyst, ligands, base and external heating to get diaryl diselenides. RESULTS A library of diaryl diselenides were obtained in good yields with different functional groups. CONCLUSION First transition metal free protocol for the synthesis of diaryl diselenides has been developed successfully.
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Affiliation(s)
- Debasish Kundu
- Department of Chemistry, Government General Degree College at Mangalkote, Affiliated to The University of Burdwan, Purba Bardhaman-713132, India
| | - Anup Roy
- Department of Chemistry, Government General Degree College at Mangalkote, Affiliated to The University of Burdwan, Purba Bardhaman-713132, India
| | - Subir Panja
- Department of Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India
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5
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Capperucci A, Coronnello M, Salvini F, Tanini D, Dei S, Teodori E, Giovannelli L. Synthesis of functionalised organochalcogenides and in vitro evaluation of their antioxidant activity. Bioorg Chem 2021; 110:104812. [PMID: 33744808 DOI: 10.1016/j.bioorg.2021.104812] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/29/2021] [Accepted: 03/05/2021] [Indexed: 11/26/2022]
Abstract
Differently substituted β-hydroxy- and β-amino dialkyl and alkyl-aryl tellurides and selenides have been prepared through ring-opening reactions of epoxides and aziridines with selenium- or tellurium-centered nucleophiles. The antioxidant properties and the cytotoxicity of such compounds have been investigated on normal human dermal fibroblasts. Most of the studied compounds exhibited a low cytotoxicity and a number of them proved to be non-toxic, not showing any effect on cell viability even at the highest concentration used (100 μM). The obtained results showed a significant antioxidant potential of the selected organotellurium compounds, particularly evident under conditions of exogenously induced oxidative stress. The antioxidant activity of selenium-containing analogues of active tellurides has also been evaluated on cells, highlighting that the replacement of Se with Te brought about a significant increase in the peroxidase activity.
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Affiliation(s)
- Antonella Capperucci
- University of Florence, Department of Chemistry "Ugo Schiff", Via della Lastruccia 3-13, I-50019 Sesto Fiorentino (Florence), Italy
| | - Marcella Coronnello
- University of Florence, Department of Health Sciences - Section of Clinical Pharmacology and Oncology, Viale Pieraccini 6, 50139 Firenze, Italy
| | - Francesca Salvini
- University of Florence, Department of Health Sciences - Section of Clinical Pharmacology and Oncology, Viale Pieraccini 6, 50139 Firenze, Italy
| | - Damiano Tanini
- University of Florence, Department of Chemistry "Ugo Schiff", Via della Lastruccia 3-13, I-50019 Sesto Fiorentino (Florence), Italy.
| | - Silvia Dei
- University of Florence, Department of Neurosciences, Psychology, Drug Research and Child's Health - Section of Pharmaceutical and Nutraceutical Sciences, via Ugo Schiff 6, 50019 Sesto Fiorentino (FI), Italy.
| | - Elisabetta Teodori
- University of Florence, Department of Neurosciences, Psychology, Drug Research and Child's Health - Section of Pharmaceutical and Nutraceutical Sciences, via Ugo Schiff 6, 50019 Sesto Fiorentino (FI), Italy
| | - Lisa Giovannelli
- University of Florence, Department of Neurosciences, Psychology, Drug Research and Child's Health - Section of Pharmacology, Viale Pieraccini 6, 50139 Firenze, Italy
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6
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Unexpected Ethyltellurenylation of Epoxides with Elemental Tellurium under Lithium Triethylborohydride Conditions. CHEMISTRY-SWITZERLAND 2020. [DOI: 10.3390/chemistry2030041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The one-pot multistep ethyltellurenylation reaction of epoxides with elemental tellurium and lithium triethylborohydride is described. The reaction mechanism was experimentally investigated. Dilithium ditelluride and triethyl borane, formed from elemental tellurium and lithium triethylborohydride, were shown to be the key species involved in the reaction mechanism. Epoxides undergo ring-opening reaction with dilithium ditelluride to afford β-hydroxy ditellurides, which are sequentially converted into the corresponding β-hydroxy-alkyl ethyl tellurides by transmetalation with triethyl borane, reasonably proceeding through the SH2 mechanism.
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7
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Tanini D, Ricci L, Capperucci A. Rongalite‐Promotedon WaterSynthesis of Functionalised Tellurides and Ditellurides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901536] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Damiano Tanini
- University of FlorenceDepartment of Chemistry “Ugo Schiff” Via della Lastruccia 3–13 I-50019 Sesto Fiorentino Italy
| | - Lorenzo Ricci
- University of FlorenceDepartment of Chemistry “Ugo Schiff” Via della Lastruccia 3–13 I-50019 Sesto Fiorentino Italy
| | - Antonella Capperucci
- University of FlorenceDepartment of Chemistry “Ugo Schiff” Via della Lastruccia 3–13 I-50019 Sesto Fiorentino Italy
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8
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Vurgun N, Nitz M. Validation of l-Tellurienylalanine as a Phenylalanine Isostere. Chembiochem 2019; 21:1136-1139. [PMID: 31742805 DOI: 10.1002/cbic.201900635] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Indexed: 01/21/2023]
Abstract
Mass cytometry (MC) and imaging mass cytometry (IMCTM ) have emerged as important tools for the study of biological heterogeneity. We recently demonstrated the use of l-2-tellurienylalanine (TePhe), a mimic of phenylalanine (Phe), as an MC- and IMC-compatible protein synthesis reporter. In this work, the biochemical similarity of TePhe and its cognate analogue, Phe, are examined in the context of the RNase S complex. Isothermal titration calorimetry studies show that incorporation of TePhe preserves the interaction of S-peptide with S-protein, and the dissociation constants for the interaction of the Phe and TePhe peptides are within a factor of two. The resulting RNase S complex is catalytically active without significant alterations in the enzyme's kinetic parameters. Furthermore, circular dichroism spectroscopy does not reveal any changes to the secondary structure of TePhe-substituted RNase S. These findings provide strong evidence that TePhe functions as a Phe isostere in the context of a folded protein. It is anticipated that incorporation of TePhe into peptides or peptidomimetic scaffolds will enable facile generation of MC and IMCTM probes.
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Affiliation(s)
- Nesrin Vurgun
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S 3H6, Canada
| | - Mark Nitz
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S 3H6, Canada
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9
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Sudati JH, Nogara PA, Saraiva RA, Wagner C, Alberto EE, Braga AL, Fachinetto R, Piquini PC, Rocha JBT. Diselenoamino acid derivatives as GPx mimics and as substrates of TrxR: in vitro and in silico studies. Org Biomol Chem 2019; 16:3777-3787. [PMID: 29737350 DOI: 10.1039/c8ob00451j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Excessive production of reactive species in living cells usually has pathological effects. Consequently, the synthesis of compounds which can mimic the activity of antioxidant enzymes has inspired great interest. In this study, a variety of diselenoamino acid derivatives from phenylalanine and valine were tested to determine whether they could be functional mimics of glutathione peroxidase (GPx) and substrates for liver thioredoxin reductase (TrxR). Diselenides C and D showed the best GPx mimicking properties when compared with A and B. We suppose that the catalytic activity of diselenide GPx mimics depends on the steric effects, which can be influenced by the number of carbon atoms between the selenium atom and the amino acid residue and/or by the amino acid lateral residue. Compounds C and D stimulated NADPH oxidation in the presence of partially purified hepatic mammalian TrxR, indicating that they are substrates for TrxR. Our study indicates a possible dissociation between the two pathways for peroxide degradation (i.e., via a substrate for TrxR or via mimicry of GPx) for compounds tested in this study, except for PhSeSePh, and the antioxidant activity of diselenoamino acids can also be attributed to their capacity to mimic GPx and to be a substrate for mammalian TrxR.
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10
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Tanini D, Capperucci A. Ring opening reactions of heterocycles with selenium and tellurium nucleophiles. NEW J CHEM 2019. [DOI: 10.1039/c9nj02320h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An overview of the preparation and synthetic potentialities of functionalized organoselenium and organotellurium compounds is presented.
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Affiliation(s)
- Damiano Tanini
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
| | - Antonella Capperucci
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
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11
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Bueno D, Meinerz D, Waczuk E, de Souza D, Batista Rocha J. Toxicity of organochalcogens in human leukocytes is associated, but not directly related with reactive species production, apoptosis and changes in antioxidant gene expression. Free Radic Res 2018; 52:1158-1169. [DOI: 10.1080/10715762.2018.1536824] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Diones Bueno
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Daiane Meinerz
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Emily Waczuk
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Diego de Souza
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - João Batista Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Santa Maria, Brazil
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12
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Singh P, Singh HB, Butcher RJ. Synthesis and characterization of selenium(I/II) and tellurium(IV) derivatives of amino acids. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Satheeshkumar K, Raju S, Singh HB, Butcher RJ. Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives. Chemistry 2018; 24:17513-17522. [DOI: 10.1002/chem.201803776] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 09/14/2018] [Indexed: 11/11/2022]
Affiliation(s)
| | - Saravanan Raju
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai 400076 India
| | - Harkesh B. Singh
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai 400076 India
| | - Ray J. Butcher
- Department of Chemistry; Howard University; 525 College Street NW Washington D.C. 20059 USA
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14
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Marino T, Galano A, Mazzone G, Russo N, Alvarez-Idaboy JR. Chemical Insights into the Antioxidant Mechanisms of Alkylseleno and Alkyltelluro Phenols: Periodic Relatives Behaving Differently. Chemistry 2018; 24:8686-8691. [PMID: 29566293 DOI: 10.1002/chem.201800913] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Indexed: 12/20/2022]
Abstract
The possible antioxidant reaction mechanisms of recently synthesized and tested alkylseleno (telluro) phenols have been explored using density functional theory by considering two solvents physiologically relevant, water and pentylethanoate (PE). In addition, the possible pathway for the antioxidant regeneration with ascorbic acid has been investigated. Results show that selenium and tellurium systems follow different chemical behaviors. In particular, the alkylseleno phenol (ebselenol) antioxidant activity is justified through a sequential proton loss-electron-transfer mechanism in water media, whereas in PE the hydrogen-atom transfer process is favored. In the case of the tellurium derivative, the oxygen-transfer mechanism represents the preferential one. Furthermore, electronic properties have been analyzed to rationalize the different reactivity of the selenium- and tellurium-containing systems. To confirm the results, smaller but similar systems were also investigated. The calculated data support the different mechanism (Se vs. Te) proposals.
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Affiliation(s)
- Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende (CS), Italy
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C.P. 09340, México DF, Mexico
| | - Gloria Mazzone
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende (CS), Italy
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende (CS), Italy
| | - Juan Raúl Alvarez-Idaboy
- Facultad de Química, Departamento de Física y Química Teórifca, Universidad Nacional, Autónoma de México, México, DF, 04510, Mexico
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15
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Ibrahim M, Ibrahim M, Muhammad N, Shah MIA, de Oliveira Leite G, Rocha JBT. Pharmacological mechanisms underlying gastroprotective activities of binapthyl diselenide in Wistar rats. Inflammopharmacology 2018. [PMID: 29536218 DOI: 10.1007/s10787-018-0451-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Selenium (Se) is a dietary essential trace element with important biological roles. It is a nutrient related to the complex metabolic and enzymatic functions. Organoselenium compounds have been reported to have anti-ulcer activity and used as drug for the treatment of gastrointestinal disorders. The antiulcer activity of binapthyl diselenide (NapSe)2 was investigated in ethanol-induced gastric lesions in rats. A number of markers of oxidative stress were examined in rats stomach including thiobarbituric acid reactive species (TBARS), catalase (CAT), superoxide dismutase (SOD), non-protein thiol groups (NPSH) and ascorbic acid. (NapSe)2 was found to be significantly restoring the deficits in the antioxidant defense mechanisms (CAT, SOD, NPSH and ascorbic acid), and suppressed lipid peroxidation in rat stomach resulting from EtOH administration. It is experimentally concluded that ethanol exposure causes alterations in the antioxidant defense system and induces oxidative stress in rat stomach. These studies establish a promising foundation for investigating and understanding the beneficial effects of organoselenium compounds on human health. Moreover, (NaPSe)2 deserves further investigation as a therapeutic and preventive agent against gastric ulcer in humans.
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Affiliation(s)
- Mohammad Ibrahim
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil. .,Department of Chemistry, Abdul Wali Khan University Mardan (AWKUM) KPK, Mardan, Pakistan.
| | - Musadiq Ibrahim
- Department of Chemistry and Division of Biochemistry and Life Science, University of Glasgow, Glasgow, G128QQ, UK.,Department of Chemistry, Kohat University of Science and Technology, Kohat, Khyber Pakhtun Khwa, Pakistan
| | - Niaz Muhammad
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | | | - Gerlânia de Oliveira Leite
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Joao B T Rocha
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
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16
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Tanini D, Grechi A, Ricci L, Dei S, Teodori E, Capperucci A. Novel functionalized organotellurides with enhanced thiol peroxidase catalytic activity. NEW J CHEM 2018. [DOI: 10.1039/c8nj00700d] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Novel tellurium-containing small molecules exhibited remarkable GPx-like activity. Their catalytic properties are strongly influenced by the nature of the β-substituent.
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Affiliation(s)
- Damiano Tanini
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
| | - Anna Grechi
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
| | - Lorenzo Ricci
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
| | - Silvia Dei
- NEUROFARBA – Dipartimento di Neuroscienze
- Psicologia
- Area del Farmaco e Salute del Bambino
- Sezione Scienze Farmaceutiche e Nutraceutiche
- Università di Firenze
| | - Elisabetta Teodori
- NEUROFARBA – Dipartimento di Neuroscienze
- Psicologia
- Area del Farmaco e Salute del Bambino
- Sezione Scienze Farmaceutiche e Nutraceutiche
- Università di Firenze
| | - Antonella Capperucci
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
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17
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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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18
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El Arem A, Lahouar L, Saafi EB, Thouri A, Ghrairi F, Houas Z, Neffati F, Achour L. Dichloroacetic acid-induced testicular toxicity in male rats and the protective effect of date fruit extract. BMC Pharmacol Toxicol 2017; 18:17. [PMID: 28431577 PMCID: PMC5401463 DOI: 10.1186/s40360-017-0127-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 02/28/2017] [Indexed: 01/05/2023] Open
Abstract
Background The present study was designed to investigate the protective effect of aqueous date extract (ADE) against the dichloroacetic acid (DCA)-induced testicular injury in rats. Methods Forty-eight male Wistar rats were randomly divided into six groups of eight: group I served as the control; group II was given ADE (4 ml/kg) by gavage; groups III and IV received DCA at 0.5 and 2 g/L drinking water, respectively; and groups V and VI received DCA at 0.5 and 2 g/L drinking water, respectively, before ADE administration. The experiment was performed for two months. Results Results showed that the absolute weights of testes and epididymis were decreased following the DCA administration. The testosterone, FSH and LH levels were also decreased. Severe histopathological changes in testes were observed including degeneration of seminiferous tubules and depletion of germ cells. These changes were associated with alterations of oxidative stress markers. Levels of lipid peroxidation and SOD and CAT activities were increased, while activity of GPx and GSH levels were decreased. Pretreatment with ADE has effectively alleviated the oxidative stress induced by DCA thereby restoring these parameters to normal values. Conclusions These results suggest that ADE has a protective effect over DCA-induced oxidative damage in rat testes.
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Affiliation(s)
- Amira El Arem
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia.
| | - Lamia Lahouar
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia
| | - Emna Behija Saafi
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia
| | - Amira Thouri
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia
| | - Fatma Ghrairi
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia
| | - Zohra Houas
- Laboratory of Histology and Cytogenetic, Faculty of Medicine, University of Monastir, Monastir, 5019, Tunisia
| | - Fadoua Neffati
- Department of Biochemistry-Toxicology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Lotfi Achour
- Laboratory of Bioressources, Biology Integrative and Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Avenue Tahar Hadded, BP 74, 5000, Monastir, Tunisia.
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19
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Gulati (nee Doomra) S, Pundir S, Kumar S, Bhasin KK. Synthesis and Characterization of 2-Fluoro-3-Pyridyl Tellurium Compounds: X-Ray Crystal Structure of Bis(2-Fluoro-3-Pyridyltelluro)Methane. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.996642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Shikha Pundir
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
| | - Sanjeev Kumar
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
| | - Kuldip K. Bhasin
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
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20
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Frizon TE, Rafique J, Saba S, Bechtold IH, Gallardo H, Braga AL. Synthesis of Functionalized Organoselenium Materials: Selenides and Diselenides Containing Cholesterol. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500124] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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21
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Soleiman-Beigi M, Yavari I, Sadeghizadeh F. The direct synthesis of symmetrical disulfides and diselenides by metal–organic framework MOF-199 as an efficient heterogenous catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra16879a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The MOF-199 was used as an efficient heterogeneous catalyst for the one-pot synthesis of organic disulfides/diselenides from aryl halides and elemental S/Se in polyethylene glycol (PEG) with good to excellent yields.
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Affiliation(s)
| | - Issa Yavari
- Chemistry Department
- Tarbiat Modares University
- Tehran
- Iran
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22
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Huang Z, Luo Q, Guan S, Gao J, Wang Y, Zhang B, Wang L, Xu J, Dong Z, Liu J. Redox control of GPx catalytic activity through mediating self-assembly of Fmoc-phenylalanine selenide into switchable supramolecular architectures. SOFT MATTER 2014; 10:9695-9701. [PMID: 25366375 DOI: 10.1039/c4sm02030h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Artificial enzymes capable of achieving tunable catalytic activity through stimuli control of enzymatic structure transition are of significance in biosensor and biomedicine research. Herein we report a novel smart glutathione peroxidise (GPx) mimic with modulatory catalytic activity based on redox-induced supramolecular self-assembly. First, an amphiphilic Fmoc-phenylalanine-based selenide was designed and synthesized, which can self-assemble into nanospheres (NSs) in aqueous solution. The NSs demonstrate extremely low GPx activity. Upon the oxidation of hydroperoxides (ROOH), the selenide can be quickly transformed into the selenoxide form. The change of the molecular structure induces complete morphology transition of the self-assemblies from NSs to nanotubes (NTs), resulting in great enhancement in the GPx catalytic activity. Under the reduction of GSH, the selenoxide can be further reversibly reduced back into the selenide; therefore the reversible switch between the NSs and NTs can be successfully accomplished. The relationship between the catalytic activity and enzymatic structure was also investigated. The dual response nature makes this mimic play roles of both a sensor and a GPx enzyme at the same time, which can auto-detect the signal of ROOH and then auto-change its activity to achieve quick or slow/no scavenging of ROOH. The dynamic balance of ROOH is vital in organisms, in which an appropriate amount of ROOH does benefit to the metabolism, whereas surplus ROOH can cause oxidative damage of the cell instead and this smart mimic is of remarkable significance. We expect that such a mimic can be developed into an effective antioxidant drug and provide a new platform for the construction of intelligent artificial enzymes with multiple desirable properties.
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Affiliation(s)
- Zupeng Huang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
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23
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Alberto EE, Muller LM, Detty MR. Rate Accelerations of Bromination Reactions with NaBr and H2O2 via the Addition of Catalytic Quantities of Diaryl Ditellurides. Organometallics 2014. [DOI: 10.1021/om500883f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Eduardo E. Alberto
- Department
of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Lisa M. Muller
- Department
of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Michael R. Detty
- Department
of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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24
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Ibrahim M, Hassan W, Anwar J, Deobald AM, Kamdem JP, Souza DO, Rocha JBT. 1-(2-(2-(2-(1-Aminoethyl)phenyl)diselanyl)phenyl)ethanamine: An amino organoselenium compound with interesting antioxidant profile. Toxicol In Vitro 2014; 28:524-30. [DOI: 10.1016/j.tiv.2013.12.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/29/2013] [Accepted: 12/21/2013] [Indexed: 02/02/2023]
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25
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Cytotoxicity and genotoxicity evaluation of organochalcogens in human leucocytes: a comparative study between ebselen, diphenyl diselenide, and diphenyl ditelluride. BIOMED RESEARCH INTERNATIONAL 2013; 2013:537279. [PMID: 24350274 PMCID: PMC3856129 DOI: 10.1155/2013/537279] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 11/06/2013] [Indexed: 11/20/2022]
Abstract
Organochalcogens, particularly ebselen, have been used in experimental and clinical trials with borderline efficacy. (PhSe)2 and (PhTe)2 are the simplest of the diaryl dichalcogenides and share with ebselen pharmacological properties. In view of the concerns with the use of mammals in studies and the great number of new organochalcogens with potential pharmacological properties that have been synthesized, it becomes important to develop screening protocols to select compounds that are worth to be tested in vivo. This study investigated the possible use of isolated human white cells as a preliminary model to test organochalcogen toxicity. Human leucocytes were exposed to 5–50 μM of ebselen, (PhSe)2, or (PhTe)2. All compounds were cytotoxic (Trypan's Blue exclusion) at the highest concentration tested, and Ebselen was the most toxic. Ebselen and (PhSe)2 were genotoxic (Comet Assay) only at 50 μM, and (PhTe)2 at 5–50 μM. Here, the acute cytotoxicity did not correspond with in vivo toxicity of the compounds. But the genotoxicity was in the same order of the in vivo toxicity to mice. These results indicate that in vitro genotoxicity in white blood cells should be considered as an early step in the investigation of potential toxicity of organochalcogens.
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26
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Vernekar AA, Mugesh G. Catalytic reduction of graphene oxide nanosheets by glutathione peroxidase mimetics reveals a new structural motif in graphene oxide. Chemistry 2013; 19:16699-706. [PMID: 24281813 DOI: 10.1002/chem.201303339] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Indexed: 11/06/2022]
Abstract
A catalytic reduction of graphene oxide (GO) by glutathione peroxidase (GPx) mimics is reported. This study reveals that GO contains peroxide functionalities, in addition to the epoxy, hydroxyl and carboxylic acid groups that have been identified earlier. It also is shown that GO acts as a peroxide substrate in the GPx-like catalytic activity of organoselenium/tellurium compounds. The reaction of tellurol, generated from the corresponding ditelluride, reduces GO through the glutathione (GSH)-mediated cleavage of the peroxide linkage. The mechanism of GO reduction by the tellurol in the presence of GSH involves the formation of a tellurenic acid and tellurenyl sulfide intermediates. Interestingly, the GPx mimics also catalyze the decarboxylation of the carboxylic acid functionality in GO at ambient conditions. Whereas the selenium/tellurium-mediated catalytic reduction/decarboxylation of GO may find applications in bioremediation processes, this study suggests that the modification of GO by biologically relevant compounds such as redox proteins must be taken into account when using GO for biomedical applications because such modifications can alter the fundamental properties of GO.
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Affiliation(s)
- Amit A Vernekar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012 (India), Fax: (+91) 80 2360 1552
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27
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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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28
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Kawasoko CY, Foletto P, Rodrigues OED, Dornelles L, Schwab RS, Braga AL. Straightforward synthesis of non-natural l-chalcogen and l-diselenide N-Boc-protected-γ-amino acid derivatives. Org Biomol Chem 2013; 11:5173-83. [DOI: 10.1039/c3ob40879e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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29
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Li Z, Ke F, Deng H, Xu H, Xiang H, Zhou X. Synthesis of disulfides and diselenides by copper-catalyzed coupling reactions in water. Org Biomol Chem 2013; 11:2943-6. [DOI: 10.1039/c3ob40464a] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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30
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Schwab RS, Schneider PH. Straightforward synthesis of non-natural chalcogen peptides via ring opening of aziridines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.082] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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31
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Imidazolium-containing diselenides for catalytic oxidations with hydrogen peroxide and sodium bromide in aqueous solutions. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Toxicological evaluation of chronic exposure to the organochalcogen 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one in male rats. Food Chem Toxicol 2012; 50:2450-5. [DOI: 10.1016/j.fct.2012.04.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 04/26/2012] [Accepted: 04/27/2012] [Indexed: 01/07/2023]
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33
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Freitas JCR, Palmeira DJ, Oliveira RA, Menezes PH, Silva RO. Differentiation and assignment of vinyl telluride regioisomers by 1
H-125
Te g
HMBC. MAGNETIC RESONANCE IN CHEMISTRY 2012; 50:481-7. [PMID: 22628089 DOI: 10.1002/mrc.3826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 02/25/2012] [Accepted: 03/12/2012] [Indexed: 02/05/2023]
Affiliation(s)
- Juliano C. R. Freitas
- Departamento de Química Fundamental, CCEN; Universidade Federal de Pernambuco; Recife PE Brazil
| | - Dayvson J. Palmeira
- Departamento de Química Fundamental, CCEN; Universidade Federal de Pernambuco; Recife PE Brazil
| | - Roberta A. Oliveira
- Departamento de Química Fundamental, CCEN; Universidade Federal de Pernambuco; Recife PE Brazil
| | - Paulo H. Menezes
- Departamento de Química Fundamental, CCEN; Universidade Federal de Pernambuco; Recife PE Brazil
| | - Ricardo O. Silva
- Departamento de Química Fundamental, CCEN; Universidade Federal de Pernambuco; Recife PE Brazil
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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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35
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Salman SM, Narayanaperumal S, Schwab RS, Bender CR, Rodrigues OED, Dornelles L. CuO nano particles and [bmim]BF4: an application towards the synthesis of chiral β-seleno amino derivatives via ring opening reaction of aziridines with diorganyl diselenides. RSC Adv 2012. [DOI: 10.1039/c2ra21488a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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36
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Nascimento V, Alberto EE, Tondo DW, Dambrowski D, Detty MR, Nome F, Braga AL. GPx-Like Activity of Selenides and Selenoxides: Experimental Evidence for the Involvement of Hydroxy Perhydroxy Selenane as the Active Species. J Am Chem Soc 2011; 134:138-41. [DOI: 10.1021/ja209570y] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Vanessa Nascimento
- Department of Chemistry, Federal University of Santa Catarina, Florianópolis-SC,
Brazil
| | - Eduardo E. Alberto
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Daniel W. Tondo
- Department of Chemistry, Federal University of Santa Catarina, Florianópolis-SC,
Brazil
| | - Daniel Dambrowski
- Department of Chemistry, Federal University of Santa Catarina, Florianópolis-SC,
Brazil
| | - Michael R. Detty
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Faruk Nome
- Department of Chemistry, Federal University of Santa Catarina, Florianópolis-SC,
Brazil
| | - Antonio L. Braga
- Department of Chemistry, Federal University of Santa Catarina, Florianópolis-SC,
Brazil
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37
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Avila DS, Palma AS, Colle D, Scolari R, Manarin F, da Silveira AF, Nogueira CW, Rocha JBT, Soares FAA. Hepatoprotective activity of a vinylic telluride against acute exposure to acetaminophen. Eur J Pharmacol 2011; 661:92-101. [PMID: 21549114 DOI: 10.1016/j.ejphar.2011.04.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 03/30/2011] [Accepted: 04/14/2011] [Indexed: 12/17/2022]
Abstract
Acetaminophen (APAP) hepatotoxicity has been related with several cases of cirrhosis, hepatitis and suicides attempts. Notably, oxidative stress plays a central role in the hepatic damage caused by APAP and antioxidants have been tested as alternative treatment against APAP toxicity. In the present study, we observed the hepatoprotector activity of the diethyl-2-phenyl-2-tellurophenyl vinylphosphonate (DPTVP), an organotellurium compound with low toxicity and high antioxidant potential. When the dose of 200 mg/kg of APAP was used, we observed that all used doses of DPTVP were able to restore the -SH levels that were depleted by APAP. Furthermore, the increase in thiobarbituric acid reactive substances levels and in the seric alanine aminotransferase (ALT) activity and the histopathological alterations caused by APAP were restored to control levels by DPTVP (30, 50 and 100 μmol/kg). On the other hand, when the 300 mg/kg dose of APAP was used, DPTVP restored the non-proteic -SH levels and repaired the normal liver morphology of the intoxicated mice only at 50 μmol/kg. Our in vitro results point out to a scavenging activity of DPTVP against several reactive species, action that is attributed to its chemical structure. Taken together, our results demonstrate that the pharmacological action of DPTVP as a hepatoprotector is probably due to its scavenging activity related to its chemical structure.
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Affiliation(s)
- Daiana Silva Avila
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, Brazil.
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Oba M, Tanaka K, Nishiyama K, Ando W. Aerobic Oxidation of Thiols to Disulfides Catalyzed by Diaryl Tellurides under Photosensitized Conditions. J Org Chem 2011; 76:4173-7. [DOI: 10.1021/jo200496r] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Makoto Oba
- Department of Materials Chemistry, Tokai University, 317 Nishino, Numazu, Shizuoka 410-0395, Japan
| | - Kazuhito Tanaka
- Department of Materials Chemistry, Tokai University, 317 Nishino, Numazu, Shizuoka 410-0395, Japan
| | - Kozaburo Nishiyama
- Department of Materials Chemistry, Tokai University, 317 Nishino, Numazu, Shizuoka 410-0395, Japan
| | - Wataru Ando
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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Schwab RS, Singh D, Alberto EE, Piquini P, Rodrigues OED, Braga AL. C–S cross-coupling of thiols with aryl iodides under ligand-free conditions using nano copper oxide as a recyclable catalyst in ionic liquid. Catal Sci Technol 2011. [DOI: 10.1039/c1cy00091h] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Alberto EE, Rossato LL, Alves SH, Alves D, Braga AL. Imidazolium ionic liquids containing selenium: synthesis and antimicrobial activity. Org Biomol Chem 2011; 9:1001-3. [DOI: 10.1039/c0ob01010c] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Bhabak KP, Mugesh G. Functional mimics of glutathione peroxidase: bioinspired synthetic antioxidants. Acc Chem Res 2010; 43:1408-19. [PMID: 20690615 DOI: 10.1021/ar100059g] [Citation(s) in RCA: 368] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oxidative stress is caused by an imbalance between the production of reactive oxygen species (ROS) and the biological system's ability to detoxify these reactive intermediates. Mammalian cells have elaborate antioxidant defense mechanisms to control the damaging effects of ROS. Glutathione peroxidase (GPx), a selenoenzyme, plays a key role in protecting the organism from oxidative damage by catalyzing the reduction of harmful hydroperoxides with thiol cofactors. The selenocysteine residue at the active site forms a "catalytic triad" with tryptophan and glutamine, which activates the selenium moiety for an efficient reduction of peroxides. After the discovery that ebselen, a synthetic organoselenium compound, mimics the catalytic activity of GPx both in vitro and in vivo, several research groups developed a number of small-molecule selenium compounds as functional mimics of GPx, either by modifying the basic structure of ebselen or by incorporating some structural features of the native enzyme. The synthetic mimics reported in the literature can be classified in three major categories: (i) cyclic selenenyl amides having a Se-N bond, (ii) diaryl diselenides, and (iii) aromatic or aliphatic monoselenides. Recent studies show that ebselen exhibits very poor GPx activity when aryl or benzylic thiols such as PhSH or BnSH are used as cosubstrates. Because the catalytic activity of each GPx mimic largely depends on the thiol cosubstrates used, the difference in the thiols causes the discrepancies observed in different studies. In this Account, we demonstrate the effect of amide and amine substituents on the GPx activity of various organoselenium compounds. The existence of strong Se···O/N interactions in the selenenyl sulfide intermediates significantly reduces the GPx activity. These interactions facilitate an attack of thiol at selenium rather than at sulfur, leading to thiol exchange reactions that hamper the formation of catalytically active selenol. Therefore, any substituent capable of enhancing the nucleophilic attack of thiol at sulfur in the selenenyl sulfide state would enhance the antioxidant potency of organoselenium compounds. Interestingly, replacement of the sec-amide substituent by a tert-amide group leads to a weakening of Se···O interactions in the selenenyl sulfide intermediates. This modification results in 10- to 20-fold enhancements in the catalytic activities. Another strategy involving the replacement of tert-amide moieties by tert-amino substituents further increases the activity by 3- to 4-fold. The most effective modification so far in benzylamine-based GPx mimics appears to be either the replacement of a tert-amino substituent by a sec-amino group or the introduction of an additional 6-methoxy group in the phenyl ring. These strategies can contribute to a remarkable enhancement in the GPx activity. In addition to enhancing catalytic activity, a change in the substituents near the selenium moiety alters the catalytic mechanisms. The mechanistic investigations of functional mimics are useful not only for understanding the complex chemistry at the active site of GPx but also for designing and synthesizing novel antioxidants and anti-inflammatory agents.
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Affiliation(s)
- Krishna P. Bhabak
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Govindasamy Mugesh
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Ionic liquid: an efficient and reusable media for seleno- and thioester synthesis promoted by indium. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.08.076] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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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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Narayanaperumal S, Alberto EE, Gul K, Rodrigues OED, Braga AL. Synthesis of Diorganyl Selenides Mediated by Zinc in Ionic Liquid. J Org Chem 2010; 75:3886-9. [DOI: 10.1021/jo100454m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Senthil Narayanaperumal
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Brazil
| | - Eduardo E. Alberto
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Brazil
| | - Kashif Gul
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Brazil
| | - Oscar E. D. Rodrigues
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Brazil
| | - Antonio L. Braga
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900, Florianópolis, Brazil
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Alberto EE, Soares LC, Sudati JH, Borges ACA, Rocha JBT, Braga AL. Efficient Synthesis of Modular Amino Acid Derivatives Containing Selenium with Pronounced GPx-Like Activity. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900485] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Braga AL, Severo Filho WA, Schwab RS, Rodrigues OE, Dornelles L, Braga HC, Lüdtke DS. Synthesis of selenium- and tellurium-containing nucleosides derived from uridine. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.164] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Narayanaperumal S, Alberto EE, de Andrade FM, Lenardão EJ, Taube PS, Braga AL. Ionic liquid: an efficient and recyclable medium for synthesis of unsymmetrical diorganyl selenides promoted by InI. Org Biomol Chem 2009; 7:4647-50. [DOI: 10.1039/b910699e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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