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Dauplais M, Romero S, Lazard M. Exposure to Selenomethionine and Selenocystine Induces Redox-Mediated ER Stress in Normal Breast Epithelial MCF-10A Cells. Biol Trace Elem Res 2024:10.1007/s12011-024-04244-y. [PMID: 38777874 DOI: 10.1007/s12011-024-04244-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 05/16/2024] [Indexed: 05/25/2024]
Abstract
Selenium is an essential trace element co-translationally incorporated into selenoproteins with important biological functions. Health benefits have long been associated with selenium supplementation. However, cytotoxicity is observed upon excessive selenium intake. The aim of this study is to investigate the metabolic pathways underlying the response to the selenium-containing amino acids selenomethionine and selenocysteine in a normal human breast epithelial cell model. We show that both selenomethionine and selenocystine inhibit the proliferation of non-cancerous MCF-10A cells in the same concentration range as cancerous MCF-7 and Hela cells, which results in apoptotic cell death. Selenocystine exposure in MCF-10A cells caused a severe depletion of free low molecular weight thiols, which might explain the observed upregulation of the expression of the oxidative stress pathway transcription factor NRF2. Both selenomethionine and selenocystine induced the expression of target genes of the unfolded protein response (GRP78, ATF4, CHOP). Using a redox-sensitive fluorescent probe targeted to the endoplasmic reticulum (ER), we show that both selenoamino acids shifted the ER redox balance towards an even more oxidizing environment. These results suggest that alteration of the redox state of the ER may disrupt protein folding and cause ER stress-induced apoptosis in MCF-10A cells exposed to selenoamino acids.
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Affiliation(s)
- Marc Dauplais
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France
| | - Stephane Romero
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France
| | - Myriam Lazard
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France.
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2
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Goettig P, Koch NG, Budisa N. Non-Canonical Amino Acids in Analyses of Protease Structure and Function. Int J Mol Sci 2023; 24:14035. [PMID: 37762340 PMCID: PMC10531186 DOI: 10.3390/ijms241814035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 09/29/2023] Open
Abstract
All known organisms encode 20 canonical amino acids by base triplets in the genetic code. The cellular translational machinery produces proteins consisting mainly of these amino acids. Several hundred natural amino acids serve important functions in metabolism, as scaffold molecules, and in signal transduction. New side chains are generated mainly by post-translational modifications, while others have altered backbones, such as the β- or γ-amino acids, or they undergo stereochemical inversion, e.g., in the case of D-amino acids. In addition, the number of non-canonical amino acids has further increased by chemical syntheses. Since many of these non-canonical amino acids confer resistance to proteolytic degradation, they are potential protease inhibitors and tools for specificity profiling studies in substrate optimization and enzyme inhibition. Other applications include in vitro and in vivo studies of enzyme kinetics, molecular interactions and bioimaging, to name a few. Amino acids with bio-orthogonal labels are particularly attractive, enabling various cross-link and click reactions for structure-functional studies. Here, we cover the latest developments in protease research with non-canonical amino acids, which opens up a great potential, e.g., for novel prodrugs activated by proteases or for other pharmaceutical compounds, some of which have already reached the clinical trial stage.
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Affiliation(s)
- Peter Goettig
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, Paracelsus Medical University, Strubergasse 21, 5020 Salzburg, Austria
| | - Nikolaj G. Koch
- Biocatalysis Group, Technische Universität Berlin, 10623 Berlin, Germany;
- Bioanalytics Group, Institute of Biotechnology, Technische Universität Berlin, 10623 Berlin, Germany;
| | - Nediljko Budisa
- Bioanalytics Group, Institute of Biotechnology, Technische Universität Berlin, 10623 Berlin, Germany;
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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3
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Zhu H, Bierla K, Tan J, Szpunar J, Chen D, Lobinski R. Effects of the fermentation process on the selenite metabolism and selenium incorporation and speciation in a probiotic Bifidobacterium longum. METALLOMICS : INTEGRATED BIOMETAL SCIENCE 2023; 15:6965834. [PMID: 36583695 DOI: 10.1093/mtomcs/mfac100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 12/19/2022] [Indexed: 12/31/2022]
Abstract
The influence of the fermentation process on selenite metabolism by a probiotic Bifidobacterium longum DD98 and its consequent enrichment in selenium (Se) were studied. The effects of sodium selenite (Na2SeO3) concentration (18-400 μg/ml), feeding time (12, 16, and 24 h), and fermentation stage (secondary and tertiary fermentation) were evaluated by measuring (i) the total Se content and its distribution between the water-soluble metabolome fraction and the water-insoluble fraction; (ii) the total concentrations of the two principal Se compounds produced: selenomethionine (SeMet) and γ-glutamyl-selenomethionine (γ-Glu-SeMet), and (iii) the speciation of Se in the metabolite fraction. The results revealed that the fermentation process notably changed the Se incorporation into metabolites (γ-Glu-SeMet and free SeMet) and proteins (bound-SeMet) in B. longum DD98. In particular, the production of SeMet was negatively correlated to that of γ-Glu-SeMet when no red precipitate was seen in the bacteria. The study offers a tool for the control of the optimization of the fermentation process towards the desired molecular speciation of the incorporated Se and hence contributes to the production of Se-enriched probiotics with good qualities and bioactivities.
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Affiliation(s)
- Hui Zhu
- State Key Laboratory of Microbial Metabolism, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China.,Universite de Pau et des Pays de l'Adour, CNRS, E2S, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, 64053 Pau, France
| | - Katarzyna Bierla
- Universite de Pau et des Pays de l'Adour, CNRS, E2S, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, 64053 Pau, France
| | - Jun Tan
- China State Institute of Pharmaceutical Industry, No. 285 Gebaini Road, Pudong New Area, Shanghai 200120, China
| | - Joanna Szpunar
- Universite de Pau et des Pays de l'Adour, CNRS, E2S, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, 64053 Pau, France
| | - Daijie Chen
- State Key Laboratory of Microbial Metabolism, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Ryszard Lobinski
- Universite de Pau et des Pays de l'Adour, CNRS, E2S, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, 64053 Pau, France.,Chair of Analytical Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland
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4
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Zhu H, Bierla K, Jin X, Szpunar J, Chen D, Lobinski R. Identification of γ-Glutamyl-Selenomethionine as the Principal Selenium Metabolite in a Selenium-Enriched Probiotic, Bifidobacterium longum, by Two-Dimensional HPLC-ICP MS and HPLC-ESI Orbitrap MS. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6726-6736. [PMID: 35607941 DOI: 10.1021/acs.jafc.2c01409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Selenium (Se)-enriched probiotics are potential sources of organic Se in the human diet, but their application in food is debated because most selenized probiotics and their metabolites are not well-characterized. We analyzed a Se-enriched probiotic, Bifidobacterium longum DD98, to unveil its Se metabolite profiles by two-dimensional high-performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP MS) and HPLC-electrospray ionization Orbitrap MS. A major Se metabolite was identified as gamma-glutamyl-selenomethionine (γ-Glu-SeMet), which accounted for 42.5 ± 3.4% of water-soluble Se. Most of the remaining Se was present as SeMet (35.2 ± 0.6%) in a free or protein-bound form. In addition, 11 minor Se metabolites were identified, eight of which had not been reported before in probiotics. Six of the identified compounds contained γ-Glu-SeMet as the core structure, constituting a γ-Glu-SeMet family. This study demonstrates the presence of γ-Glu-SeMet in a probiotic, showing a different selenite metabolite pathway from that of Se-enriched yeast, and it offers an alternative and potentially attractive source of organic Se for food and feed supplementation.
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Affiliation(s)
- Hui Zhu
- State Key Laboratory of Microbial Metabolism, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China
- Université de Pau, CNRS, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, Pau 64053, France
| | - Katarzyna Bierla
- Université de Pau, CNRS, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, Pau 64053, France
| | - Xueli Jin
- State Key Laboratory of Microbial Metabolism, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Joanna Szpunar
- Université de Pau, CNRS, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, Pau 64053, France
| | - Daijie Chen
- State Key Laboratory of Microbial Metabolism, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Ryszard Lobinski
- Université de Pau, CNRS, Institute of Analytical and Physical Chemistry for the Environment and Materials, IPREM-UMR5254, Hélioparc, Pau 64053, France
- Chair of Analytical Chemistry, Warsaw University of Technology, Warsaw 00-664, Poland
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5
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LeBlanc KL, Mester Z. Compilation of selenium metabolite data in selenized yeasts. Metallomics 2021; 13:6307519. [PMID: 34156080 DOI: 10.1093/mtomcs/mfab031] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 04/30/2021] [Indexed: 11/12/2022]
Abstract
Selenium-enriched yeast has long been recognized as an important nutritional source of selenium and studies have suggested that supplementation with this material provides chemo-preventative benefits beyond those observed for selenomethionine supplementation, despite the fact that selenomethionine accounts for 60-84% of the total selenium in selenized yeasts. There is much ongoing research into the characterization of the species comprising the remaining 16-40% of the selenium, with nearly 100 unique selenium-containing metabolites identified in aqueous extracts of selenized yeasts (Saccharomyces cerevisiae). Herein, we discuss the analytical approaches involved in the identification and quantification of these metabolites, and present a recently created online database (DOI: 10.4224/40001921) of reported selenium species along with chemical structures and unique mass spectral features.
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Affiliation(s)
- Kelly L LeBlanc
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada
| | - Zoltán Mester
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada
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6
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González-Salitre L, Román-Gutiérrez A, Contreras-López E, Bautista-Ávila M, Rodríguez-Serrano G, González-Olivares L. Promising Use of Selenized Yeast to Develop New Enriched Food: Human Health Implications. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1934695] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- L González-Salitre
- Área Académica De Química, Universidad Autónoma Del Estado De Hidalgo. Ciudad Del Conocimiento, Carretera Pachuca-Tulancingo Km 4.5, Colonia Carboneras, Hidalgo, México
| | - Ad Román-Gutiérrez
- Área Académica De Química, Universidad Autónoma Del Estado De Hidalgo. Ciudad Del Conocimiento, Carretera Pachuca-Tulancingo Km 4.5, Colonia Carboneras, Hidalgo, México
| | - E Contreras-López
- Área Académica De Química, Universidad Autónoma Del Estado De Hidalgo. Ciudad Del Conocimiento, Carretera Pachuca-Tulancingo Km 4.5, Colonia Carboneras, Hidalgo, México
| | - M Bautista-Ávila
- Área Académica De Farmacia, Universidad Autónoma Del Estado De Hidalgo, Instituto De Ciencias De La Salud, Ex-Hacienda La Concepción, San Agustíın Tlaxiaca, Hidalgo, México
| | - Gm Rodríguez-Serrano
- Universidad Autónoma Metropolitana, Unidad Iztapalapa, División De Ciencias Biológicas Y De La Salud, Departamento De Biotecnología, Av. San Rafael Atlixco 186, Colonia Vicentina AP 09340, Ciudad De México, México
| | - Lg González-Olivares
- Área Académica De Química, Universidad Autónoma Del Estado De Hidalgo. Ciudad Del Conocimiento, Carretera Pachuca-Tulancingo Km 4.5, Colonia Carboneras, Hidalgo, México
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7
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Nasim MJ, Zuraik MM, Abdin AY, Ney Y, Jacob C. Selenomethionine: A Pink Trojan Redox Horse with Implications in Aging and Various Age-Related Diseases. Antioxidants (Basel) 2021; 10:antiox10060882. [PMID: 34072794 PMCID: PMC8229699 DOI: 10.3390/antiox10060882] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/18/2021] [Accepted: 05/27/2021] [Indexed: 01/15/2023] Open
Abstract
Selenium is an essential trace element. Although this chalcogen forms a wide variety of compounds, there are surprisingly few small-molecule organic selenium compounds (OSeCs) in biology. Besides its more prominent relative selenocysteine (SeCys), the amino acid selenomethionine (SeMet) is one example. SeMet is synthesized in plants and some fungi and, via nutrition, finds its way into mammalian cells. In contrast to its sulfur analog methionine (Met), SeMet is extraordinarily redox active under physiological conditions and via its catalytic selenide (RSeR')/selenoxide (RSe(O)R') couple provides protection against reactive oxygen species (ROS) and other possibly harmful oxidants. In contrast to SeCys, which is incorporated via an eloquent ribosomal mechanism, SeMet can enter such biomolecules by simply replacing proteinogenic Met. Interestingly, eukaryotes, such as yeast and mammals, also metabolize SeMet to a small family of reactive selenium species (RSeS). Together, SeMet, proteins containing SeMet and metabolites of SeMet form a powerful triad of redox-active metabolites with a plethora of biological implications. In any case, SeMet and its family of natural RSeS provide plenty of opportunities for studies in the fields of nutrition, aging, health and redox biology.
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Affiliation(s)
- Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Mhd Mouayad Zuraik
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Ahmad Yaman Abdin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
- University Lille, CNRS, Centrale Lille, University Artois, UMR 8181–UCCS–Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Yannick Ney
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
- Correspondence: ; Tel.: +49-681-302-3129
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8
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Dauplais M, Bierla K, Maizeray C, Lestini R, Lobinski R, Plateau P, Szpunar J, Lazard M. Methylselenol Produced In Vivo from Methylseleninic Acid or Dimethyl Diselenide Induces Toxic Protein Aggregation in Saccharomyces cerevisiae. Int J Mol Sci 2021; 22:ijms22052241. [PMID: 33668124 PMCID: PMC7956261 DOI: 10.3390/ijms22052241] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 01/22/2023] Open
Abstract
Methylselenol (MeSeH) has been suggested to be a critical metabolite for anticancer activity of selenium, although the mechanisms underlying its activity remain to be fully established. The aim of this study was to identify metabolic pathways of MeSeH in Saccharomyces cerevisiae to decipher the mechanism of its toxicity. We first investigated in vitro the formation of MeSeH from methylseleninic acid (MSeA) or dimethyldiselenide. Determination of the equilibrium and rate constants of the reactions between glutathione (GSH) and these MeSeH precursors indicates that in the conditions that prevail in vivo, GSH can reduce the major part of MSeA or dimethyldiselenide into MeSeH. MeSeH can also be enzymatically produced by glutathione reductase or thioredoxin/thioredoxin reductase. Studies on the toxicity of MeSeH precursors (MSeA, dimethyldiselenide or a mixture of MSeA and GSH) in S.cerevisiae revealed that cytotoxicity and selenomethionine content were severely reduced in a met17 mutant devoid of O-acetylhomoserine sulfhydrylase. This suggests conversion of MeSeH into selenomethionine by this enzyme. Protein aggregation was observed in wild-type but not in met17 cells. Altogether, our findings support the view that MeSeH is toxic in S. cerevisiae because it is metabolized into selenomethionine which, in turn, induces toxic protein aggregation.
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Affiliation(s)
- Marc Dauplais
- Laboratoire de Biologie Structurale de la Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP Paris, 91128 Palaiseau CEDEX, France; (M.D.); (C.M.); (P.P.)
| | - Katarzyna Bierla
- IPREM UMR5254, E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, CNRS, Université de Pau et des Pays de l’Adour, Hélioparc, 64053 Pau, France; (K.B.); (R.L.); (J.S.)
| | - Coralie Maizeray
- Laboratoire de Biologie Structurale de la Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP Paris, 91128 Palaiseau CEDEX, France; (M.D.); (C.M.); (P.P.)
| | - Roxane Lestini
- Laboratoire d’Optique et Biosciences, École Polytechnique, CNRS UMR7645—INSERM U1182, IP Paris, 91128 Palaiseau CEDEX, France;
| | - Ryszard Lobinski
- IPREM UMR5254, E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, CNRS, Université de Pau et des Pays de l’Adour, Hélioparc, 64053 Pau, France; (K.B.); (R.L.); (J.S.)
- Laboratory of Molecular Dietetics, I.M. Sechenov First Moscow State Medical University, 19048 Moscow, Russia
- Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa, Poland
| | - Pierre Plateau
- Laboratoire de Biologie Structurale de la Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP Paris, 91128 Palaiseau CEDEX, France; (M.D.); (C.M.); (P.P.)
| | - Joanna Szpunar
- IPREM UMR5254, E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, CNRS, Université de Pau et des Pays de l’Adour, Hélioparc, 64053 Pau, France; (K.B.); (R.L.); (J.S.)
| | - Myriam Lazard
- Laboratoire de Biologie Structurale de la Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP Paris, 91128 Palaiseau CEDEX, France; (M.D.); (C.M.); (P.P.)
- Correspondence:
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9
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Talbert LE, Julian RR. Methionine and Selenomethionine as Energy Transfer Acceptors for Biomolecular Structure Elucidation in the Gas Phase. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:1601-1608. [PMID: 31222676 PMCID: PMC6697561 DOI: 10.1007/s13361-019-02262-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/31/2019] [Accepted: 06/01/2019] [Indexed: 06/09/2023]
Abstract
Mass spectrometry affords rapid and sensitive analysis of peptides and proteins. Coupling spectroscopy with mass spectrometry allows for the development of new methods to enhance biomolecular structure determination. Herein, we demonstrate two new energy acceptors that can be utilized for action-excitation energy transfer experiments. In the first system, C-S bonds in methionine act as energy acceptors from native chromophores, including tyrosine, tryptophan, and phenylalanine. Comparison among chromophores reveals that tyrosine transfers energy most efficiently at 266 nm, but phenylalanine and tryptophan also transfer energy with comparable efficiencies. Overall, the C-S bond dissociation yields following energy transfer are low for methionine, which led to an investigation of selenomethionine, a common analog that is found in many naturally occurring proteins. Sulfur and selenium are chemically similar, but C-Se bonds are weaker than C-S bonds and have lower lying σ* anti-bonding orbitals. Excitation of peptides containing tyrosine and tryptophan results in efficient energy transfer to selenomethionine and abundant C-Se bond dissociation. A series of helical peptides were examined where the positions of the donor or acceptor were systematically scanned to explore the influence of distance and helix orientation on energy transfer. The distance was found to be the primary factor affecting energy transfer efficiency, suggesting that selenomethionine may be a useful acceptor for probing protein structure in the gas phase.
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Affiliation(s)
- Lance E Talbert
- Department of Chemistry, University of California, Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA
| | - Ryan R Julian
- Department of Chemistry, University of California, Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA.
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10
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LeBlanc KL, Kumkrong P, Mercier PHJ, Mester Z. Selenium analysis in waters. Part 2: Speciation methods. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:1635-1651. [PMID: 29935780 DOI: 10.1016/j.scitotenv.2018.05.394] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 05/25/2018] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
In aquatic ecosystems, there is often no correlation between the total concentration of selenium present in the water column and the toxic effects observed in that environment. This is due, in part, to the variation in the bioavailability of different selenium species to organisms at the base of the aquatic food chain. The first part of this review (Kumkrong et al., 2018) discusses regulatory framework and standard methodologies for selenium analysis in waters. In this second article, we are reviewing the state of speciation analysis and importance of speciation data for decision makers in industry and regulators. We look in detail at fractionation methods for speciation, including the popular selective sequential hydride generation. We examine advantages and limitations of these methods, in terms of achievable detection limits and interferences from other matrix species, as well as the potential to over- or under-estimate operationally-defined fractions based on the various conversion steps involved in fractionation processes. Additionally, we discuss methods of discrete speciation (through separation methods), their importance in analyzing individual selenium species, difficulties associated with their implementation, as well as ways to overcome these difficulties. We also provide a brief overview of biological treatment methods for the remediation of selenium-contaminated waters. We discuss the importance of selenium speciation in the application of these methods and their potential to actually increase the bioavailability of selenium despite decreasing its total waterborne concentration.
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Affiliation(s)
- Kelly L LeBlanc
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada.
| | - Paramee Kumkrong
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada
| | - Patrick H J Mercier
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada
| | - Zoltán Mester
- National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, Canada
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11
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Gajdosechova Z, Mester Z, Feldmann J, Krupp EM. The role of selenium in mercury toxicity – Current analytical techniques and future trends in analysis of selenium and mercury interactions in biological matrices. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.12.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Pereira AG, Gerolis LGL, Gonçalves LS, Pedrosa TA, Neves MJ. Selenized
Saccharomyces cerevisiae
cells are a green dispenser of nanoparticles. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aab524] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Lazard M, Dauplais M, Blanquet S, Plateau P. Recent advances in the mechanism of selenoamino acids toxicity in eukaryotic cells. Biomol Concepts 2018; 8:93-104. [PMID: 28574376 DOI: 10.1515/bmc-2017-0007] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 05/03/2017] [Indexed: 12/31/2022] Open
Abstract
Selenium is an essential trace element due to its incorporation into selenoproteins with important biological functions. However, at high doses it is toxic. Selenium toxicity is generally attributed to the induction of oxidative stress. However, it has become apparent that the mode of action of seleno-compounds varies, depending on its chemical form and speciation. Recent studies in various eukaryotic systems, in particular the model organism Saccharomyces cerevisiae, provide new insights on the cytotoxic mechanisms of selenomethionine and selenocysteine. This review first summarizes current knowledge on reactive oxygen species (ROS)-induced genotoxicity of inorganic selenium species. Then, we discuss recent advances on our understanding of the molecular mechanisms of selenocysteine and selenomethionine cytotoxicity. We present evidences indicating that both oxidative stress and ROS-independent mechanisms contribute to selenoamino acids cytotoxicity. These latter mechanisms include disruption of protein homeostasis by selenocysteine misincorporation in proteins and/or reaction of selenols with protein thiols.
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Exposure to selenomethionine causes selenocysteine misincorporation and protein aggregation in Saccharomyces cerevisiae. Sci Rep 2017; 7:44761. [PMID: 28303947 PMCID: PMC5355996 DOI: 10.1038/srep44761] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/13/2017] [Indexed: 12/23/2022] Open
Abstract
Selenomethionine, a dietary supplement with beneficial health effects, becomes toxic if taken in excess. To gain insight into the mechanisms of action of selenomethionine, we screened a collection of ≈5900 Saccharomyces cerevisiae mutants for sensitivity or resistance to growth-limiting amounts of the compound. Genes involved in protein degradation and synthesis were enriched in the obtained datasets, suggesting that selenomethionine causes a proteotoxic stress. We demonstrate that selenomethionine induces an accumulation of protein aggregates by a mechanism that requires de novo protein synthesis. Reduction of translation rates was accompanied by a decrease of protein aggregation and of selenomethionine toxicity. Protein aggregation was supressed in a ∆cys3 mutant unable to synthetize selenocysteine, suggesting that aggregation results from the metabolization of selenomethionine to selenocysteine followed by translational incorporation in the place of cysteine. In support of this mechanism, we were able to detect random substitutions of cysteinyl residues by selenocysteine in a reporter protein. Our results reveal a novel mechanism of toxicity that may have implications in higher eukaryotes.
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15
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The mechanism of improved intracellular organic selenium and glutathione contents in selenium-enriched Candida utilis by acid stress. Appl Microbiol Biotechnol 2016; 101:2131-2141. [PMID: 27896382 DOI: 10.1007/s00253-016-8016-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 10/21/2016] [Accepted: 11/13/2016] [Indexed: 10/20/2022]
Abstract
Batch culture of Candida utilis CCTCC M 209298 for the preparation of selenium (Se)-enriched yeast was carried out under different pH conditions, and maximal intracellular organic Se and glutathione (GSH) contents were obtained in a moderate acid stress environment (pH 3.5). In order to elucidate the physiological mechanism of improved performance of Se-enriched yeast by acid stress, assays of the key enzymes involved in GSH biosynthesis and determinations of energy supply and regeneration were performed. The results indicated that moderate acid stress increased the activity of γ-glutamylcysteine synthetase and the ratios of NADH/NAD+ and ATP/ADP, although no significant changes in intracellular pH were observed. In addition, the molecular mechanism of moderate acid stress favoring the improvement of Se-yeast performance was revealed by comparing whole transcriptomes of yeast cells cultured at pH 3.5 and 5.5. Comparative analysis of RNA-Seq data indicated that 882 genes were significantly up-regulated by moderate acid stress. Functional annotation of the up-regulated genes based on gene ontology and the Kyoto Encyclopedia of Genes and Genome (KEGG) pathway showed that these genes are involved in ATP synthesis and sulfur metabolism, including the biosynthesis of methionine, cysteine, and GSH in yeast cells. Increased intracellular ATP supply and more amounts of sulfur-containing substances in turn contributed to Na2SeO3 assimilation and biotransformation, which ultimately improved the performance of the Se-enriched C. utilis.
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16
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Kitajima T, Chiba Y. Selenomethionine metabolism and its toxicity in yeast. Biomol Concepts 2015; 4:611-6. [PMID: 25436761 DOI: 10.1515/bmc-2013-0033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 10/28/2013] [Indexed: 11/15/2022] Open
Abstract
The importance of selenium for organisms can be explained by its existence as selenocysteine in the catalytic centers of glutathione peroxidase and thioredoxin reductase. Another selenoamino acid, selenomethionine, is the major form of selenium in foods, and organisms that require selenium as a nutrient directly metabolize selenomethionine to a reactive form of selenium or store it in general proteins. Selenium is recognized as an essential nutrient for human and animal health; however, its excessive uptake harms mammals and the cytotoxic mechanism of selenium remains unclear. Recent progress in the development of selenium-enriched yeast and selenomethionine-resistant mutant to produce selenomethionine-containing proteins for X-ray crystallography has provided new insights into the molecular mechanism of selenomethionine toxicity. In this review, we describe the metabolism of seleno-compounds in yeast and discuss the cytotoxicity caused by selenomethionine against yeast from a metabolic viewpoint.
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Lazo-Vélez MA, Chávez-Santoscoy A, Serna-Saldivar SO. Selenium-Enriched Breads and Their Benefits in Human Nutrition and Health as Affected by Agronomic, Milling, and Baking Factors. Cereal Chem 2015. [DOI: 10.1094/cchem-05-14-0110-rw] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Marco A. Lazo-Vélez
- Centro de Biotecnología–FEMSA, Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey–Campus Monterrey, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849, Monterrey, NL, Mexico
| | - Alejandra Chávez-Santoscoy
- Centro de Biotecnología–FEMSA, Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey–Campus Monterrey, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849, Monterrey, NL, Mexico
| | - Sergio O. Serna-Saldivar
- Centro de Biotecnología–FEMSA, Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey–Campus Monterrey, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849, Monterrey, NL, Mexico
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18
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Selenium-Functionalized Molecules (SeFMs) as Potential Drugs and Nutritional Supplements. TOPICS IN MEDICINAL CHEMISTRY 2015. [DOI: 10.1007/7355_2015_87] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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19
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Far J, Delvaux C, Kune C, Eppe G, de Pauw E. The Use of Ion Mobility Mass Spectrometry for Isomer Composition Determination Extracted from Se-Rich Yeast. Anal Chem 2014; 86:11246-54. [DOI: 10.1021/ac503142u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Johann Far
- Department
of Chemistry, Laboratory of Mass Spectrometry, University of Liège, 3 Allée
de la chimie, B6C, Liege (Sart Tilman), B-4000, Belgium
| | - Cédric Delvaux
- Department
of Chemistry, Laboratory of Mass Spectrometry, University of Liège, 3 Allée
de la chimie, B6C, Liege (Sart Tilman), B-4000, Belgium
| | - Christopher Kune
- Department
of Chemistry, Laboratory of Mass Spectrometry, University of Liège, 3 Allée
de la chimie, B6C, Liege (Sart Tilman), B-4000, Belgium
| | - Gauthier Eppe
- Department
of Chemistry, Laboratory of Mass Spectrometry, University of Liège, 3 Allée
de la chimie, B6C, Liege (Sart Tilman), B-4000, Belgium
- Centre
of Analytical Research and Technology (CART) - LSM/Inorganic Analytical
Chemistry, Department of Chemistry, University of Liège, 3, Allee de la Chimie
B6C, Liege, 4000, Belgium
| | - Edwin de Pauw
- Department
of Chemistry, Laboratory of Mass Spectrometry, University of Liège, 3 Allée
de la chimie, B6C, Liege (Sart Tilman), B-4000, Belgium
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20
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Rodrigo S, Santamaria O, Chen Y, McGrath SP, Poblaciones MJ. Selenium speciation in malt, wort, and beer made from selenium-biofortified two-rowed barley grain. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:5948-53. [PMID: 24869769 DOI: 10.1021/jf500793t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Selenium (Se) biofortification of barley is a suitable strategy to increase the Se concentration in grain. In the present paper, the suitability of this Se-biofortified grain for making Se-enriched beer is analyzed. The aim of the present study was to evaluate the effect of different Se fertilizer doses (0, 10, and 20 g of Se ha(-1)) and forms (sodium selenate or sodium selenite) on the Se loss during the malting and brewing processes and Se speciation in grain, malt, wort, and beer. Samples were analyzed using inductively coupled plasma-mass spectrometry (ICP-MS) and high-performance liquid chromatography (HPLC)-ICP-MS for total Se and speciation. Mashing-lautering was the process with the greatest Se loss (83.8%). After malting and brewing, only 7.3% of the initial Se was retained in beer, mainly in selenite form. Even so, the fertilizer application of sodium selenate at 20 g ha(-1) increased the total Se concentration almost 6-fold in the final beer in comparison to the use of grain derived from unfertilized barley. The present paper provides evidence that the use of Se-biofortified barley grain as a raw material to produce Se-enriched beer is possible, and the results are comparable to other methods in terms of efficiency.
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Affiliation(s)
- Sara Rodrigo
- Department of Agronomy and Forest Environment Engineering, University of Extremadura , Avenida Adolfo Suárez s/n, 06007 Badajoz, Spain
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Lazo-Vélez MA, Gutiérrez-Díaz VA, Ramírez-Medrano A, Serna-Saldívar SO. Effect of sodium selenite addition and sponge dough fermentation on selenomethionine generation during production of yeast-leavened breads. J Cereal Sci 2013. [DOI: 10.1016/j.jcs.2013.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rampler E, Rose S, Wieder D, Ganner A, Dohnal I, Dalik T, Hann S, Koellensperger G. Monitoring the production process of selenized yeast by elemental speciation analysis. Metallomics 2012; 4:1176-84. [DOI: 10.1039/c2mt20138k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Chantiratikul A, Chinrasri O, Pakmaruek P, Chantiratikul P, Thosaikham W, Aengwanich W. Responses of growing Japanese quails that received selenium from selenium enriched kale sprout (Brassica oleracea var. alboglabra L.). Biol Trace Elem Res 2011; 144:760-8. [PMID: 21681467 DOI: 10.1007/s12011-011-9112-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Accepted: 06/05/2011] [Indexed: 11/26/2022]
Abstract
The objectives of this study were to determine the effect of selenium (Se) from Se-enriched kale sprout (Brassica oleracea var. alboglabra L.) on the performance and Se concentrations in tissues of growing Japanese quails. Two hundred quails were divided into five treatments. Each treatment consisted of four replicates and each replicate contained ten quails in a completely randomize design. The experiment was conducted for 5 weeks. The treatments were T1, control diet; T2, control diet plus 0.2 mg Se/kg from sodium selenite; T3, T4, and T5, control diet plus 0.2, 0.5, and 1.0 mg Se/kg from Se-enriched kale sprout. The results revealed that Se supplementation had no impact on feed intake, performance, and carcass characteristics of quails (p > 0.05). However, Se supplementation from both sodium selenite and Se-enriched kale sprout increased (p < 0.05) Se concentrations in the heart and breast meat of quails. Se concentrations in the liver and breast meat of quails increased (p < 0.05) with increasing Se concentration from Se-enriched kale sprout. The results indicate that Se from Se-enriched kale sprout offers no advantage over Se from sodium selenite on tissue Se concentration.
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Affiliation(s)
- Anut Chantiratikul
- Faculty of Veterinary and Animal Sciences, Mahasarakham University, Maha Sarakham, 44000, Thailand.
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Walden H. Selenium incorporation using recombinant techniques. ACTA CRYSTALLOGRAPHICA SECTION D: BIOLOGICAL CRYSTALLOGRAPHY 2010; 66:352-7. [PMID: 20382987 PMCID: PMC2852298 DOI: 10.1107/s0907444909038207] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Accepted: 09/21/2009] [Indexed: 11/29/2022]
Abstract
An overview of techniques for recombinant incorporation of selenium and subsequent purification and crystallization of the resulting labelled protein. Using selenomethionine to phase macromolecular structures is common practice in structure determination, along with the use of selenocysteine. Selenium is consequently the most commonly used heavy atom for MAD. In addition to the well established recombinant techniques for the incorporation of selenium in prokaryal expression systems, there have been recent advances in selenium labelling in eukaryal expression, which will be discussed. Tips and things to consider for the purification and crystallization of seleno-labelled proteins are also included.
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Affiliation(s)
- Helen Walden
- Protein Structure and Function Laboratory, Cancer Research UK London Research Institute, Lincoln's Inn Fields, London WC2A 3PX, England.
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Wallschläger D, Feldmann J. Formation, Occurrence, Significance, and Analysis of Organoselenium and Organotellurium Compounds in the Environment. ORGANOMETALLICS IN ENVIRONMENT AND TOXICOLOGY 2010. [DOI: 10.1039/9781849730822-00319] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Among all environmentally-relevant trace elements, selenium has one of the most diverse organic chemistries. It is also one of the few trace elements that may biomagnify in food chains under certain conditions. Yet, the exact chemical forms of selenium involved in the uptake into organisms and transfer to higher trophic levels, as well as the biochemical mechanisms that lead to their subsequent metabolism in organisms, are still not well understood. This is in part due to the analytical challenges associated with measuring the myriad of discrete Se species occurring in organisms. While there are generalized concepts of selenium metabolism, there is a lack of conclusive analytical evidence supporting the existence of many postulated intermediates. Likewise, there is a disconnect between the major selenium species encountered in abiotic compartments (waters, soils, and sediment), and those found in organisms, which renders the qualitative and quantitative description of the bioaccumulation process uncertain. Here, we summarize the knowledge on important selenium and tellurium species in all environmental compartments, and identify gaps and uncertainties in the existing body of knowledge, with emphasis on problems associated with past and current analytical methodology.
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Affiliation(s)
- Dirk Wallschläger
- Environmental & Resource Sciences Program and Department of Chemistry, Trent University 1600 West Bank Dr. Peterborough ON K9J 7B8 Canada
| | - Jörg Feldmann
- Trace Element Speciation Laboratory (TESLA), College of Physical Science, University of Aberdeen Meston Walk Aberdeen Scotland AB24 3UE UK
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Amoako PO, Uden PC, Tyson JF. Speciation of selenium dietary supplements; formation of S-(methylseleno)cysteine and other selenium compounds. Anal Chim Acta 2009; 652:315-23. [DOI: 10.1016/j.aca.2009.08.013] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 07/29/2009] [Accepted: 08/12/2009] [Indexed: 02/07/2023]
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Dernovics M, Far J, Lobinski R. Identification of anionic selenium species in Se-rich yeast by electrospray QTOF MS/MS and hybrid linear ion trap/orbitrap MSn. Metallomics 2009; 1:317-29. [DOI: 10.1039/b901184f] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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