1
|
Initial Results of the International Efforts in Screening New Agents against Candida auris. J Fungi (Basel) 2022; 8:jof8080771. [PMID: 35893139 PMCID: PMC9330594 DOI: 10.3390/jof8080771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/07/2022] [Accepted: 07/11/2022] [Indexed: 12/10/2022] Open
Abstract
BACKGROUND Candida auris is an emergent fungal pathogen and a global concern, mostly due to its resistance to many currently available antifungal drugs. OBJECTIVE Thus, in response to this challenge, we evaluated the in vitro activity of potential new drugs, diphenyl diselenide (PhSe)2 and nikkomycin Z (nikZ), alone and in association with currently available antifungals (azoles, echinocandins, and polyenes) against Candida auris. METHODS Clinical isolates of C. auris were tested in vitro. (PhSe)2 and nikZ activities were tested alone and in combination with amphotericin B, fluconazole, or the echinocandins, micafungin and caspofungin. RESULTS (PhSe)2 alone was unable to inhibit C. auris, and antagonism or indifferent effects were observed in the combination of this compound with the antifungals tested. NikZ appeared not active alone either, but frequently acted cooperatively with conventional antifungals. CONCLUSION Our data show that (PhSe)2 appears to not have a good potential to be a candidate in the development of new drugs to treat C. auris, but that nikZ is worthy of further study.
Collapse
|
2
|
Benelli JL, Poester VR, Munhoz LS, Melo AM, Trápaga MR, Stevens DA, Xavier MO. Ebselen and diphenyl diselenide against fungal pathogens: A systematic review. Med Mycol 2021; 59:409-421. [PMID: 33421963 DOI: 10.1093/mmy/myaa115] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/16/2020] [Accepted: 12/18/2020] [Indexed: 12/17/2022] Open
Abstract
Fungal infections are one of the most prevalent diseases in the world and there is a lack of new antifungal drug development for these diseases. We conducted a systematic review of the literature regarding the in vitro antifungal activity of the organoselenium compounds ebselen (Eb) and diphenyl diselenide [(PhSe)2]. A systematic review was carried out based on the search for articles with data concerning Minimal Inhibitory Concentration (MIC) values, indexed in international databases and published until August 2020. A total of 2337 articles were found, and, according to the inclusion and exclusion criteria used, 22 articles were included in the study. Inhibitory activity against 96% (200/208) and 95% (312/328) of the pathogenic fungi tested was described for Eb and [(PhSe)2], respectively. Including in these 536 fungal isolates tested, organoselenium activity was highlighted against Candida spp., Cryptococcus ssp., Trichosporon spp., Aspergillus spp., Fusarium spp., Pythium spp., and Sporothrix spp., with MIC values lower than 64 μg/mL. In conclusion, Eb and [(PhSe)2] have a broad spectrum of in vitro inhibitory antifungal activity. These data added with other pharmacological properties of these organoselenium compounds suggest that both compounds are potential future antifungal drugs. Whether MICs toward the upper end of the ranges described here are compatible with efficacious therapy, and whether they may achieve such end as a result of the favorable non-antimicrobial effects of selenium on the host, requires more in vivo testing.
Collapse
Affiliation(s)
- Jéssica Louise Benelli
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Vanice Rodrigues Poester
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Lívia Silveira Munhoz
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Aryse Martins Melo
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Microbiology and Parasitology Post-graduation program, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
| | | | - David A Stevens
- California Institute for Medical Research, San Jose, California, USA.,Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, California, USA
| | - Melissa Orzechowski Xavier
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil.,Microbiology and Parasitology Post-graduation program, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
| |
Collapse
|
3
|
Ferreira LM, Sari MHM, Cervi VF, Prado VC, Nadal JM, Azambuja JH, da Silveira EF, Nogueira CW, Farago PV, Braganhol E, Cruz L. Design of Pegylated-Nanocapsules to Diphenyl Diselenide Administration: In Vitro Evidence of Hemocompatible and Selective Antiglioma Formulation. AAPS PharmSciTech 2020; 21:307. [PMID: 33151442 DOI: 10.1208/s12249-020-01845-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 10/07/2020] [Indexed: 12/31/2022] Open
Abstract
Diphenyl diselenide [(PhSe)2] is a pleiotropic pharmacological agent, but it has low aqueous solubility. The nanoencapsulation of (PhSe)2 allowed the preparation of an aqueous formulation as well as potentiated its in vitro antitumor effect and the effectiveness in a preclinical model of glioblastoma when administered by the intragastric route. Thus, aiming at maximizing the therapeutic potential of (PhSe)2, the present study designed a pegylated-formulation intending to intravenous administration of the (PhSe)2 as a new approach for glioma therapy. The poly(Ɛ-caprolactone) nanocapsules containing (PhSe)2 were physically coated with polyethyleneglycol (PEG) using the preformed polymer interfacial deposition technique and evaluated through physicochemical, morphological, spectroscopic, and thermal characteristics. Hemocompatibility was determined by the in vitro hemolysis test and cytotoxicity assays were performed in astrocytes and glioma C6 cells (10-100 μM). The pegylated-nanocapsules had an average diameter of 218 ± 25 nm, polydispersity index of 0.164 ± 0.046, zeta potential of - 8.1 ± 1.6 mV, pH 6.0 ± 0.09, (PhSe)2 content of 102.00 ± 3.57%, and encapsulation efficiency around 98%. Besides, the (PhSe)2 pegylated-nanocapsules were spherical, presented absence of chemical interaction among the constituents, and showed higher thermal stability than the non-encapsulated materials. PEG-coated nanocapsules did not cause hemolytic effect while formulations without PEG induced a hemolysis rate above 10%. Moreover, pegylated-nanocapsules had superior in vitro antiglioma effect in comparison to free compound (IC50: 24.10 μM and 74.83 μM, respectively). Therefore, the (PhSe)2-loaded pegylated-nanocapsule suspensions can be considered a hemocompatible formulation for the glioma treatment by the intravenous route.
Collapse
|
4
|
Melo AM, Poester VR, Trapaga M, Nogueira CW, Zeni G, Martinez M, Sass G, Stevens DA, Xavier MO. Diphenyl diselenide and its interaction with antifungals against Aspergillus spp. Med Mycol 2020; 59:myaa072. [PMID: 32844203 DOI: 10.1093/mmy/myaa072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 07/16/2020] [Accepted: 08/20/2020] [Indexed: 02/06/2023] Open
Abstract
Given the few antifungal classes available to treat aspergillosis, this study aimed to evaluate the in vitro antifungal activity of diphenyl diselenide (PhSe)2 alone and in combination with classical antifungals against Aspergillus spp., and its in vivo activity in a systemic experimental aspergillosis model. We performed in vitro broth microdilution assay of (PhSe)2 against 32 Aspergillus isolates; and a checkboard assay to test the interaction of this compound with itraconazole (ITC), voriconazole (VRC), amphotericin B (AMB), and caspofungin (CAS), against nine Aspergillus isolates. An experimental model of invasive aspergillosis in mice was studied, and survival curves were compared between an untreated group and groups treated with 100 mg/kg ITC, or (PhSe)2 in different dosages (10 mg/kg, 50 mg/kg and 100 mg/kg). All Aspergillus non-fumigatus and 50% of A. fumigatus were inhibited by (PhSe)2 in concentrations ≤ 64 µg/ml, with significant differences in MICs between the sections. Synergism or additive effect in the in vitro (PhSe)2 interaction with VRC and CAS was observed against the majority of isolates, and with ITC against the non-fumigatus strains. In addition to the inhibitory interaction, (PhSe)2 was able to add a fungicidal effect to CAS. Survival curves from the systemic experimental aspergillosis model demonstrated that the inoculum caused an acute and lethal infection in mice, and no treatment applied significantly prolonged survival over that of the control group. The results highlight the promising activity of (PhSe)2 against Aspergillus species, but more in vivo studies are needed to determine its potential applicability in aspergillosis treatment. LAY SUMMARY The activity of diphenyl diselenide (PhSe)2 alone and in combination with itraconazole, voriconazole, and caspofungin, is described against three of the most pathogenic Aspergillus sections. (PhSe)2 may prove useful in therapy of infection in future; further study is required.
Collapse
Affiliation(s)
- Aryse Martins Melo
- Microbiology and Parasitology Post-graduation program, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
- Department of Infectious Diseases/Reference Unit for Parasitic and Fungal Infections, National Institute of Health, Dr. Ricardo Jorge, Lisbon, Portugal
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Vanice Rodrigues Poester
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
- Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Mariana Trapaga
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Cristina Wayne Nogueira
- Biological Sciences Post-graduation program, Department of Biochemistry and Molecular Biology, Center for Natural and Exact Sciences, Federal University of Santa Maria. RS, Brazil
| | - Gilson Zeni
- Biological Sciences Post-graduation program, Department of Biochemistry and Molecular Biology, Center for Natural and Exact Sciences, Federal University of Santa Maria. RS, Brazil
| | - Marife Martinez
- California Institute for Medical Research, San Jose, California, USA
| | - Gabriele Sass
- California Institute for Medical Research, San Jose, California, USA
| | - David A Stevens
- California Institute for Medical Research, San Jose, California, USA
- Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, California, USA
| | - Melissa Orzechowski Xavier
- Microbiology and Parasitology Post-graduation program, Institute of Biology, Federal University of Pelotas, Pelotas, RS, Brazil
- Mycology Laboratory, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
- Health Science Post-graduation program, College of Medicine, Federal University of Rio Grande, Rio Grande, RS, Brazil
- California Institute for Medical Research, San Jose, California, USA
| |
Collapse
|
5
|
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.
Collapse
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
| |
Collapse
|
6
|
Ferreira LM, Cervi VF, Sari MHM, Barbieri AV, Ramos AP, Copetti PM, de Brum GF, Nascimento K, Nadal JM, Farago PV, Sagrillo MR, Nogueira CW, Cruz L. Diphenyl diselenide loaded poly(ε-caprolactone) nanocapsules with selective antimelanoma activity: Development and cytotoxic evaluation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:1-9. [DOI: 10.1016/j.msec.2018.05.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 04/10/2018] [Accepted: 05/02/2018] [Indexed: 12/26/2022]
|
7
|
Poester VR, Mattei AS, Mendes JF, Klafke GB, Ramis IB, Sanchotene KO, Xavier MO. Antifungal activity of diphenyl diselenide alone and in combination with itraconazole againstSporothrix brasiliensis. Med Mycol 2018; 57:328-331. [DOI: 10.1093/mmy/myy044] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/28/2018] [Accepted: 05/16/2018] [Indexed: 12/26/2022] Open
Affiliation(s)
- Vanice Rodrigues Poester
- Mycology Lab, Faculty of Medicine, Federal University of Rio Grande (FaMed-FURG), Rio Grande do Sul, Brazil
- Post-graduation program in Health Science, FaMed-FURG, RS, Brazil
| | | | - Josiara Furtado Mendes
- Mycology Lab, Faculty of Medicine, Federal University of Rio Grande (FaMed-FURG), Rio Grande do Sul, Brazil
| | - Gabriel Baracy Klafke
- Mycology Lab, Faculty of Medicine, Federal University of Rio Grande (FaMed-FURG), Rio Grande do Sul, Brazil
| | - Ivy Bastos Ramis
- Post-graduation program in Health Science, FaMed-FURG, RS, Brazil
| | - Karine Ortiz Sanchotene
- Mycology Lab, Faculty of Medicine, Federal University of Rio Grande (FaMed-FURG), Rio Grande do Sul, Brazil
| | - Melissa Orzechowski Xavier
- Mycology Lab, Faculty of Medicine, Federal University of Rio Grande (FaMed-FURG), Rio Grande do Sul, Brazil
- Post-graduation program in Health Science, FaMed-FURG, RS, Brazil
| |
Collapse
|
8
|
Galant LS, Braga MM, de Souza D, de Bem AF, Sancineto L, Santi C, da Rocha JBT. Induction of reactive oxygen species by diphenyl diselenide is preceded by changes in cell morphology and permeability in Saccharomyces cerevisiae. Free Radic Res 2017; 51:657-668. [PMID: 28840761 DOI: 10.1080/10715762.2017.1355054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Organoselenium compounds, such as diphenyl diselenide (PhSe)2 and phenylselenium zinc chloride (PhSeZnCl), show protective activities related to their thiol peroxidase activity. However, depending on experimental conditions, organoselenium compounds can cause toxicity by oxidising thiol groups of proteins and induce the production of reactive oxygen species (ROS). Here, we analysed the toxicity of (PhSe)2 and PhSeZnCl in yeast Saccharomyces cerevisiae. Cell growth of S. cerevisiae after 1, 2, 3, 4, 6, and 16 h of treatment with 2, 4, 6, and 10 μM of (PhSe)2 was evaluated. For comparative purpose, PhSeZnCl was analysed only at 16 h of incubation at equivalent concentrations of selenium (i.e. 4, 8, 12, and 20 μM). ROS production (DCFH-DA), size, granularity, and cell membrane permeability (propidium iodide) were determined by flow cytometry. (PhSe)2 inhibited cell growth at 2 h (10 μM) of incubation, followed by increase in cell size. The increase of cell membrane permeability and granularity (10 μM) was observed after 3 h of incubation, however, ROS production occurs only at 16 h of incubation (10 μM) with (PhSe)2, indicating that ROS overproduction is a more likely consequence of (PhSe)2 toxicity and not its determinant. All tested parameters showed that only concentration of 20 μM induced toxicity in samples incubated with PhSeZnCl. In summary, the results suggest that (PhSe)2 toxicity in S. cerevisiae is time and concentration dependent, presenting more toxicity when compared with PhSeZnCl.
Collapse
Affiliation(s)
- Leticia Selinger Galant
- a Laboratório de Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas , Universidade Federal de Santa , Maria , Brazil
| | - Marcos Martins Braga
- a Laboratório de Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas , Universidade Federal de Santa , Maria , Brazil
| | - Diego de Souza
- a Laboratório de Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas , Universidade Federal de Santa , Maria , Brazil
| | - Andreza Fabro de Bem
- b Departamento Bioquímica, Centro de Ciências Biológicas , Universidade Federal de Santa Catarina , Florianópolis , Brazil
| | - Luca Sancineto
- c Group of Catalysis and Organic Green Chemistry Department of Pharmaceutical Sciences , University of Perugia , Perugia , Italy
| | - Claudio Santi
- c Group of Catalysis and Organic Green Chemistry Department of Pharmaceutical Sciences , University of Perugia , Perugia , Italy
| | - Joao Batista Teixeira da Rocha
- a Laboratório de Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas , Universidade Federal de Santa , Maria , Brazil
| |
Collapse
|
9
|
Lovato FL, Teixeira da Rocha JB, Dalla Corte CL. Diphenyl Diselenide Protects against Methylmercury-Induced Toxicity in Saccharomyces cerevisiae via the Yap1 Transcription Factor. Chem Res Toxicol 2017; 30:1134-1144. [DOI: 10.1021/acs.chemrestox.6b00449] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fabricio Luís Lovato
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
| | - João Batista Teixeira da Rocha
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
| | - Cristiane Lenz Dalla Corte
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
- Universidade Federal do Pampa, Campus
Caçapava do Sul, Av. Pedro Anunciação, 111, Vila
Batista, 96570-000 Caçapava do Sul, RS, Brazil
| |
Collapse
|
10
|
Venturini TP, Chassot F, Loreto ÉS, Keller JT, Azevedo MI, Zeni G, Santurio JM, Alves SH. Antifungal activities of diphenyl diselenide and ebselen alone and in combination with antifungal agents againstFusariumspp. Med Mycol 2016; 54:550-5. [DOI: 10.1093/mmy/myv120] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 12/18/2015] [Indexed: 01/17/2023] Open
|
11
|
Rosseti IB, Rocha JBT, Costa MS. Diphenyl diselenide (PhSe)2 inhibits biofilm formation by Candida albicans, increasing both ROS production and membrane permeability. J Trace Elem Med Biol 2015; 29:289-95. [PMID: 25189816 DOI: 10.1016/j.jtemb.2014.08.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/07/2014] [Accepted: 08/06/2014] [Indexed: 12/11/2022]
Abstract
PROJECT The opportunistic fungal Candida albicans can produce superficial and systemic infections in immunocompromised patients. An essential stage to both colonization and virulence by C. albicans is the transition from budding yeast form to filamentous form, producing biofilms. PROCEDURE In this work, we studied the effect of the organochalcogenide compound (PhSe)2 on both cell growth and biofilm formation by C. albicans. RESULTS (PhSe)2 inhibited both growth and biofilm formation by C. albicans. The inhibitory effects of (PhSe)2 depended on the cell density and (PhSe)2 concentration. We have also observed that (PhSe)2 stimulated ROS production (67%) and increased cell membrane permeability (2.94-fold) in C. albicans. In addition, (PhSe)2 caused a marked decrease in proteinase activity (6.8-fold) in relation to non-treated group. CONCLUSIONS (PhSe)2 decreased both cell growth and biofilm development, decreasing the release of extracellular proteinases, which is an important facet of C. albicans pathogenicity. The toxicity of (PhSe)2 towards C. albicans can be associated with an increase in ROS production, which can increase cell permeability. The permanent damage to the cell membranes can culminate in cell death.
Collapse
Affiliation(s)
- Isabela Bueno Rosseti
- Instituto de Pesquisa e Desenvolvimento - IP&D, Universidade do Vale do Paraíba - UNIVAP, Av. Shishima Hifumi, 2911, CEP 12244-000, São José dos Campos, SP, Brazil
| | - João Batista Teixeira Rocha
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, Brazil
| | - Maricilia Silva Costa
- Instituto de Pesquisa e Desenvolvimento - IP&D, Universidade do Vale do Paraíba - UNIVAP, Av. Shishima Hifumi, 2911, CEP 12244-000, São José dos Campos, SP, Brazil.
| |
Collapse
|
12
|
de Andrade RB, Gemelli T, Guerra RB, Dani C, Wannmacher CMD, Gomez R, Funchal C. Acute exposure to the vinyl chalcogenide 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one induces oxidative stress in different brain area of rats. Cell Biochem Funct 2014; 32:438-44. [DOI: 10.1002/cbf.3035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 01/02/2014] [Accepted: 02/03/2014] [Indexed: 12/28/2022]
Affiliation(s)
| | - Tanise Gemelli
- Departamento de Bioquímica; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Robson B. Guerra
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul; Sertão RS Brazil
| | - Caroline Dani
- Centro Universitário Metodista do IPA; Porto Alegre RS Brazil
| | | | - Rosane Gomez
- Departamento de Farmacologia; Universidade Federal do Rio Grande do Sul, ICBS; Porto Alegre RS Brazil
| | - Cláudia Funchal
- Centro Universitário Metodista do IPA; Porto Alegre RS Brazil
| |
Collapse
|
13
|
Pesarico AP, Sartori G, dos Santos CF, Neto JS, Bortolotto V, Santos RCV, Nogueira CW, Prigol M. 2,2′-Dithienyl diselenide pro-oxidant activity accounts for antibacterial and antifungal activities. Microbiol Res 2013; 168:563-8. [DOI: 10.1016/j.micres.2013.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 04/12/2013] [Accepted: 04/13/2013] [Indexed: 01/07/2023]
|
14
|
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
|
15
|
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]
|
16
|
Loreto ÉS, Nunes Mario DA, Santurio JM, Alves SH, Nogueira CW, Zeni G. In vitro antifungal evaluation and structure-activity relationship of diphenyl diselenide and synthetic analogues. Mycoses 2011; 54:e572-6. [DOI: 10.1111/j.1439-0507.2010.01994.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
The organochalcogen 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one induces oxidative stress in heart, liver, and kidney of rats. Mol Cell Biochem 2011; 355:167-72. [PMID: 21533766 DOI: 10.1007/s11010-011-0850-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 04/20/2011] [Indexed: 10/18/2022]
Abstract
The objective of this study was to investigate the in vitro effects of the organochalcogen 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one on some parameters of oxidative stress in liver, kidney, and heart of 10-day-old rats. The homogenates of liver, kidney, and heart were incubated for 1 h in the absence (control) or in the presence of 1, 10, or 30 μM of the organoselenium and thiobarbituric acid reactive substances, carbonyl, and the activity of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) were measured. First, we tested the influence of the compound on 1,1-diphenyl-2-picrylhydrazyl (DPPH(•)) radical scavenging and verified that the organochalcogen did not have any antioxidant properties. We observed an increase of lipid peroxidation in all concentrations tested in heart and kidney, while in liver only in the concentrations of 10 and 30 μM. Moreover, we also verified an enhance of protein oxidation in the concentrations of 10 and 30 μM in kidney. On the other hand, the compound caused a reduction on the activity of CAT in heart (10 and 30 μM), liver (30 μM), and kidney (30 μM). The activity of SOD was increased in heart (10 and 30 μM), while in liver (30 μM) and in kidney (10 and 30 μM) the activity was reduced. Our findings indicate that this organoselenium compound induces oxidative stress in liver, heart, and kidney of immature rats, collaborating to the fact that these tissues are potential targets for the organochalcogen action.
Collapse
|
18
|
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]
|
19
|
|
20
|
Barbosa NBDV, Oliveira C, Araldi D, Folmer V, Rocha JBT, Nogueira CW. Acute diphenyl diselenide treatment reduces hyperglycemia but does not change delta-aminolevulinate dehydratase activity in alloxan-induced diabetes in rats. Biol Pharm Bull 2009; 31:2200-4. [PMID: 19043199 DOI: 10.1248/bpb.31.2200] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was designed to evaluate the effect of diphenyl diselenide in a classical model of alloxan-induced diabetes in rats. Oxidative stress is involved in alloxan toxic effects and we have hypothesized that diphenyl diselenide via its antioxidant properties could confer protection against alloxan pancreatic toxicity. Diabetes was induced by administration of alloxan (150 mg/kg, intravenously). Diphenyl diselenide (10 mg/kg, subcutaneously) was administered for 6 d before (prevention group) or for 6 d after (remediation group) diabetes induction. Diphenyl diselenide treatment reduced the blood glucose and fructosamine levels, which were increased in alloxan-treated rats. However, the delta-aminolevulinate dehydratase (delta-ALA-D) activity inhibited by alloxan was not restored by diphenyl diselenide. Moreover, diphenyl diselenide caused by itself an inhibition in hepatic and renal delta-ALA-D activity. Our findings suggest that the acute treatment with diphenyl diselenide reduces the hyperglycemia but does not improve delta-ALA-D activity decreased by alloxan. Although the dose of diphenyl diselenide used here for treating diabetic animals has been relatively high and produced toxic effects, the compound or analogous molecules might not be rejected as a promising anti-hyperglycemic agent.
Collapse
|
21
|
Schiar VPP, dos Santos DB, Paixão MW, Nogueira CW, Rocha JBT, Zeni G. Human erythrocyte hemolysis induced by selenium and tellurium compounds increased by GSH or glucose: A possible involvement of reactive oxygen species. Chem Biol Interact 2009; 177:28-33. [DOI: 10.1016/j.cbi.2008.10.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 10/03/2008] [Accepted: 10/03/2008] [Indexed: 11/26/2022]
|
22
|
A role for yeast glutaredoxin genes in selenite-mediated oxidative stress. Fungal Genet Biol 2008; 45:1182-7. [DOI: 10.1016/j.fgb.2008.05.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 05/12/2008] [Accepted: 05/28/2008] [Indexed: 11/18/2022]
|
23
|
Barbosa NBV, Rocha JBT, Soares JCM, Wondracek DC, Gonçalves JF, Schetinger MRC, Nogueira CW. Dietary diphenyl diselenide reduces the STZ-induced toxicity. Food Chem Toxicol 2008; 46:186-94. [PMID: 17870224 DOI: 10.1016/j.fct.2007.07.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 07/10/2007] [Accepted: 07/25/2007] [Indexed: 02/07/2023]
Abstract
Oxidative stress is implicated in the pathogenesis of diabetes mellitus. Selenium supplementation has some benefits in experimental models of diabetes mellitus. This study evaluated whether dietary diphenyl diselenide, a simple synthetic organoselenium compound with antioxidant properties, reduces the streptozotocin (STZ)-induced toxicity. STZ-induced diabetic rats were fed with either standard and diphenyl diselenide (10 ppm) supplemented diets. In experimental trials, dietary diphenyl diselenide significantly decreased mortality rate (p<0.05) induced by STZ treatment. No correlation between this effect and glycemic levels were found. Diphenyl diselenide intake also promoted an increase in vitamin C, -SH levels (liver, kidney and blood) and in catalase (liver and kidney) activity, which were decreased in STZ-treated rats. In enzyme assays, diphenyl diselenide supplementation caused a significant improvement in platelets NTPDase and 5'-nucleotidase activities in STZ-induced diabetic rats when compared to the control and diabetic groups (p<0.05). Nevertheless, this supplementation did not modify the inhibition induced by STZ in delta-ALA-D activity. Our findings suggest that diphenyl diselenide compound showed beneficial effects against the development of diabetes by exhibiting antioxidant properties.
Collapse
Affiliation(s)
- N B V Barbosa
- Universidade Federal de Santa Maria - UNIPAMPA, Centro de Ciências da Saúde, Rua Domingos de Almeida, 3525, São Miguel, 97500-009 Uruguaiana, RS, Brazil.
| | | | | | | | | | | | | |
Collapse
|
24
|
Diphenyl diselenide supplementation delays the development of N-nitroso-N-methylurea-induced mammary tumors. Arch Toxicol 2007; 82:655-63. [PMID: 18074119 DOI: 10.1007/s00204-007-0271-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 11/28/2007] [Indexed: 12/23/2022]
Abstract
The effect of dietary diphenyl diselenide (1 ppm) on N-nitroso-N-methylurea (NMU)-induced mammary carcinogenesis was examined in female Wistar rats. Beginning at 5 weeks of age, the animals were fed with either control or diphenyl-diselenide-supplied diets until the end of the study (210 days). At 50 days of age, mammary tumor was induced by the administration of three doses of NMU (50 mg/kg body wt, intraperitoneally) once a week for 3 weeks. In experimental trials, latency to tumor onset was extended in rats fed with diet supplemented with diphenyl diselenide (P < 0.05). The incidence and frequency of tumors were significantly small in animals supplemented with diphenyl diselenide. However, the multiplicity of tumors was not altered by dietary diphenyl diselenide. Diphenyl diselenide supplementation also restored superoxide dismutase (SOD) activity and vitamin C levels altered in the NMU group (P < 0.05). Our results suggest that diphenyl diselenide can be considered a chemopreventive agent, even when supplemented at a relatively low concentration.
Collapse
|
25
|
Rosa RM, Hoch NC, Furtado GV, Saffi J, Henriques JAP. DNA damage in tissues and organs of mice treated with diphenyl diselenide. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 633:35-45. [PMID: 17590383 DOI: 10.1016/j.mrgentox.2007.05.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 04/24/2007] [Accepted: 05/09/2007] [Indexed: 01/02/2023]
Abstract
Diphenyl diselenide (DPDS) is an organoselenium compound with interesting pharmacological activities and various toxic effects. In previous reports, we demonstrated the pro-oxidant action and the mutagenic properties of this molecule in bacteria, yeast and cultured mammalian cells. This study investigated the genotoxic effects of DPDS in multiple organs (brain, kidney, liver, spleen, testes and urinary bladder) and tissues (bone marrow, lymphocytes) of mice using in vivo comet assay, in order to determine the threshold of dose at which it has beneficial or toxic effects. We assessed the mechanism underlying the genotoxicity through the measurement of GSH content and thiobarbituric acid reactive species, two oxidative stress biomarkers. Male CF-1 mice were given 0.2-200 micromol/kg BW DPDS intraperitonially. DPDS induced DNA damage in brain, liver, kidney and testes in a dose response manner, in a broad dose range at 75-200 micromol/kg with the brain showing the highest level of damage. Overall, our analysis demonstrated a high correlation among decreased levels of GSH content and an increase in lipid peroxidation and DNA damage. This finding establishes an interrelationship between pro-oxidant and genotoxic effects. In addition, DPDS was not genotoxic and did not increase lipid peroxidation levels in any organs at doses < 50 micromol/kg. Finally, pre-treatment with N-acetyl-cysteine completely prevented DPDS-induced oxidative damage by the maintenance of cellular GSH levels, reinforcing the positive relationship of DPDS-induced GSH depletion and DNA damage. In summary, DPDS induces systemic genotoxicity in mammals as it causes DNA damage in vital organs like brain, liver, kidney and testes.
Collapse
Affiliation(s)
- Renato Moreira Rosa
- Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 9500, Bairro Agronomia, CEP 91501-970 Porto Alegre, RS, Brazil
| | | | | | | | | |
Collapse
|
26
|
Rosa R, Roesler R, Braga A, Saffi J, Henriques J. Pharmacology and toxicology of diphenyl diselenide in several biological models. Braz J Med Biol Res 2007; 40:1287-304. [DOI: 10.1590/s0100-879x2006005000171] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- R.M. Rosa
- Universidade Federal do Rio Grande do Sul
| | - R. Roesler
- Universidade Federal do Rio Grande do Sul, Brasil
| | - A.L. Braga
- Universidade Federal de Santa Maria, Brasil
| | - J. Saffi
- Universidade Federal do Rio Grande do Sul; Universidade Luterana do Brasil, Brasil
| | - J.A.P. Henriques
- Universidade Federal do Rio Grande do Sul; Universidade Luterana do Brasil, Brasil
| |
Collapse
|
27
|
Rosa RM, Moura DJ, Romano E Silva AC, Saffi J, Pêgas Henriques JA. Antioxidant activity of diphenyl diselenide prevents the genotoxicity of several mutagens in Chinese hamster V79 cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 631:44-54. [PMID: 17507284 DOI: 10.1016/j.mrgentox.2007.04.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2007] [Revised: 04/03/2007] [Accepted: 04/04/2007] [Indexed: 12/28/2022]
Abstract
Diphenyl diselenide (DPDS) is an electrophilic reagent used in the synthesis of a variety of pharmacologically active organic selenium compounds. Studies have shown its antioxidant, hepatoprotective, neuroprotective, anti-inflammatory, and antinociceptive effects. We recently showed the antioxidant effect of DPDS in V79 cells, and established the beneficial and toxic doses of this compound in this cell line. Here, we report the antigenotoxic and antimutagenic properties of DPDS, investigated by using a permanent lung fibroblast cell line derived from Chinese hamsters. We determined the cytotoxicity by clonal survival assay, and evaluated DNA damage in response to several mutagens by comet assay and micronucleus test in binucleated cells. In the clonal survival assay, at concentrations ranging from 1.62 to 12.5microM, DPDS was not cytotoxic, while at concentrations up to 25microM, it significantly decreased survival. The treatment with this organoselenium compound at non-cytotoxic dose range increased cell survival after challenge with hydrogen peroxide, methyl-methanesulphonate, and UVC radiation, but did not protect against 8-methoxypsoralen plus UVA-induced cytotoxicity. In addition, the treatment prevented induced DNA damage, as verified in the comet assay. The mutagenic effect of these genotoxins, as measured by the micronucleus test, similarly attenuated or prevented cytotoxicity and DNA damage. Treatment with DPDS also decreased lipid peroxidation levels after exposure to hydrogen peroxide MMS, and UVC radiation, and increased glutathione peroxidase activity in the extracts. Our results clearly demonstrate that DPDS at low concentrations presents antimutagenic properties, which are most probably due to its antioxidant properties.
Collapse
Affiliation(s)
- Renato Moreira Rosa
- Departamento de Biofísica e Centro de Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | | | | | | |
Collapse
|
28
|
Lewinska A, Bartosz G. Protection of yeast lacking the Ure2 protein against the toxicity of heavy metals and hydroperoxides by antioxidants. Free Radic Res 2007; 41:580-90. [PMID: 17454141 DOI: 10.1080/10715760701209904] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The aim of this study was to examine the protection of the yeast lacking the "antioxidant-like" prion precursor protein (Ure2p), by antioxidants and to elucidate how modification of redox homeostasis affects toxicity of agents inducing oxidative stress in the Deltaure2 cells. We found a diverse ability of a range of antioxidants to ameliorate the hypersensitivity of the Deltaure2 disruptant to oxidants and heavy metal ions. Glutathione and then ascorbate were the most effective antioxidants; Tempol, Trolox and melatonin were much less effective or even hampered the growth of the Deltaure2 cells exposed to tested agents. The intracellular level of ROS was augmented in the Deltaure2 mutant under normal growth conditions (1.7-fold), and after treatment with H(2)O(2) (2.3-fold) and Cd(II) (2.8-fold), with respect to its wild-type counterpart. Glutathione was unable to prevent the increase in ROS production caused by CdCl(2). The Deltaure2 disruptant was also hypersensitive to heat shock, like mutants lacking glutathione S-transferases.
Collapse
Affiliation(s)
- Anna Lewinska
- Department of Biochemistry and Cell Biology, University of Rzeszow, Rzeszow, Poland.
| | | |
Collapse
|
29
|
Rosa RM, do Nascimento Picada J, Saffi J, Henriques JAP. Cytotoxic, genotoxic, and mutagenic effects of diphenyl diselenide in Chinese hamster lung fibroblasts. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 628:87-98. [PMID: 17223377 DOI: 10.1016/j.mrgentox.2006.12.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 12/04/2006] [Accepted: 12/07/2006] [Indexed: 11/26/2022]
Abstract
Diphenyl diselenide (DPDS) is an electrophilic reagent used in the synthesis of a variety of pharmacologically active organic selenium compounds, and may increase the risk of human exposure to this chemical at the workplace. In a previous study, we demonstrated the pro-oxidant action and the mutagenic properties of this compound on bacteria and yeast. In the present study, we evaluated the putative cytotoxic, pro-oxidant, genotoxic, and mutagenic properties of this molecule in V79 Chinese lung fibroblast cells. When cells were treated with increasing concentrations of DPDS, its cytotoxic activity, as determined using four cell viability endpoints, occurs in doses up to 50 microM. The MTT reduction was stimulated, which may indicate reactive oxygen species (ROS) generation. Accordingly, the treatment of cells for 3h with cytotoxic doses of DPDS increased TBARS levels, and sensitized cells to oxidative challenge, indicating a pro-oxidant effect. The measurement of total, reduced, and oxidized glutathione showed that DPDS can lead to lower intracellular glutathione depletion, with no increase in the oxidation rate in a dose- and time-dependent manner. At the higher doses, DPDS generates DNA strand breaks, as observed using the comet assay. The treatment also induced an increase in the number of binucleated cells in the micronucleus test, showing mutagenic risk by this molecule at high concentrations. Finally, pre-incubation with N-acetylcysteine, which restored GSH to normal levels, annulled DPDS pro-oxidant and genotoxic effects. These findings show that DPDS-induced oxidative stress and toxicity are closely related to intracellular level of reduced glutathione. Moreover, at lower doses, this molecule has antioxidant properties, protecting the cell against oxidative damage induced by hydrogen peroxide.
Collapse
Affiliation(s)
- Renato Moreira Rosa
- Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | | | | |
Collapse
|
30
|
Schiar VPP, Dos Santos DB, Lüdtke DS, Vargas F, Paixão MW, Nogueira CW, Zeni G, Rocha JBT. Screening of potentially toxic chalcogens in erythrocytes. Toxicol In Vitro 2007; 21:139-45. [PMID: 17084588 DOI: 10.1016/j.tiv.2006.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 08/25/2006] [Accepted: 08/29/2006] [Indexed: 11/23/2022]
Abstract
Previous literature reports have demonstrated that a number of human diseases, including inflammation and cancer, can be caused by environmental and occupational exposure to toxic compounds, via DNA damage, protein modifications, or lipid peroxidation. The present study was undertaken to screen the toxicity of a variety of chalcogens using erythrocytes as a model of cell injury. The toxicity of these compounds was evaluated via quantification of hemolysis and lipid peroxidation. The present investigation shows that diphenyl ditelluride and phenyl tellurides are toxic to erythrocytes. The organoselenium compounds were not toxic to erythrocytes even when tested at high concentrations and with a hematocrit of 45%. The hemolytic effect of tellurides was not positively correlated with thiobarbituric acid-reactive substance (TBARS) production suggesting that lipid peroxidation is not involved in the hemolysis provoked by organotellurium compounds. The results suggest that chalcogen compounds may be toxic to human erythrocytes, depending on their structure.
Collapse
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
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Machado MS, Rosa RM, Dantas AS, Reolon GK, Appelt HR, Braga AL, Henriques JAP, Roesler R. An organic selenium compound attenuates apomorphine-induced stereotypy in mice. Neurosci Lett 2006; 410:198-202. [PMID: 17052842 DOI: 10.1016/j.neulet.2006.09.079] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2006] [Revised: 09/20/2006] [Accepted: 09/29/2006] [Indexed: 10/24/2022]
Abstract
Selenium compounds display neuroprotective activities mediated at least in part by their antioxidant actions. Oxidative damage has been implicated in psychiatric disorders including schizophrenia and bipolar disorder, and an alteration in expression of selenium-binding protein-1 (SELENBP-1) has been recently reported in both the blood and brain of schizophrenic patients. In the present study we examined the effects of the organic selenium compound 3'3-ditrifluoromethyldiphenyl diselenide [(F3CPhSe)2] on apomorphine-induced stereotypy in mice, an animal model of psychosis. Systemic administration of (F3CPhSe)2 at the highest dose used (25.0 micromol/kg in a 10.0 ml/kg injection volume) significantly reduced apomorphine-induced stereotyped behaviors. A series of control experiments showed that the same dose of (F3CPhSe)2 did not affect open-field behavior, habituation, or aversively motivated memory. The results indicate that organic selenium compounds should be further investigated as agents with possible antipsychotic properties.
Collapse
Affiliation(s)
- Miriana S Machado
- Graduate Program in Cellular and Molecular Biology and Center for Biotechnology, Federal University of Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Barbosa NBV, Rocha JBT, Wondracek DC, Perottoni J, Zeni G, Nogueira CW. Diphenyl diselenide reduces temporarily hyperglycemia: Possible relationship with oxidative stress. Chem Biol Interact 2006; 163:230-8. [PMID: 16965767 DOI: 10.1016/j.cbi.2006.08.004] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2006] [Revised: 07/31/2006] [Accepted: 08/07/2006] [Indexed: 02/07/2023]
Abstract
This study was designed to determine the effect of diphenyl diselenide and ebselen, synthetic organoselenium compounds with antioxidant properties, in diabetic rats. Diabetes was induced by the administration of streptozotocin (STZ) (45mg/kg, intravenous). In experimental trials, diphenyl diselenide, but not ebselen, caused a significant reduction in blood glucose levels of STZ-treated rats. This effect of diphenyl diselenide was accompanied by a reduction in the levels of glycated proteins. Diphenyl diselenide ameliorate superoxide dismutase activity (liver and erythrocytes) and Vitamin C levels (liver, kidney and blood), which were decreased in STZ-treated rats. In normal rats, diphenyl diselenide caused per se an increase in hepatic, renal and blood GSH levels. Similarly, treatment with diphenyl diselenide restored hepatic and renal GSH levels in STZ-treated rats. TBARS and protein carbonyl levels were not modified by STZ and/or diphenyl diselenide and ebselen treatments. Our findings suggest that diphenyl diselenide can be considered an anti-diabetogenic agent by exhibiting anti-hyperglycemic and antioxidant properties.
Collapse
Affiliation(s)
- N B V Barbosa
- Departamento de Quimica, Centro de Ciencias Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | | | | | | | | | | |
Collapse
|
33
|
Letavayová L, Vlcková V, Brozmanová J. Selenium: From cancer prevention to DNA damage. Toxicology 2006; 227:1-14. [PMID: 16935405 DOI: 10.1016/j.tox.2006.07.017] [Citation(s) in RCA: 248] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 06/28/2006] [Accepted: 07/19/2006] [Indexed: 01/08/2023]
Abstract
Selenium (Se) is a dietary essential trace element with important biological roles. Accumulating evidence indicates that Se compounds possess anticancer properties. Se is specifically incorporated into proteins in the form of selenocysteine and non-specifically incorporated as selenomethionine in place of methionine. The effects of Se compounds on cells are strictly compositional and concentration-dependent. At supranutritional dietary levels, Se can prevent the development of many types of cancer. At higher concentrations, Se compounds can be either cytotoxic or possibly carcinogenic. The cytotoxicity of Se is suggested to be associated with oxidative stress. Accordingly, sodium selenite, an inorganic Se compound, was reported to induce DNA damage, particularly DNA strand breaks and base damage. In this review we summarize the various activities of Se compounds and focus on their relation to DNA damage and repair. We discuss the use of Saccharomyces cerevisiae for identification of the genes involved in Se toxicity and resistance.
Collapse
Affiliation(s)
- Lucia Letavayová
- Laboratory of Molecular Genetic, Cancer Research Institute, Slovak Academy of Sciences, 833 91 Bratislava, Slovak Republic
| | | | | |
Collapse
|
34
|
Current awareness on yeast. Yeast 2006. [DOI: 10.1002/yea.1289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|