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Chen K, Yang J, Guo X, Han W, Wang H, Zeng X, Wang Z, Yuan Y, Yue T. Microflora structure and functional capacity in Tibetan kefir grains and selenium-enriched Tibetan kefir grains: A metagenomic analysis. Food Microbiol 2024; 119:104454. [PMID: 38225054 DOI: 10.1016/j.fm.2023.104454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/06/2023] [Accepted: 12/18/2023] [Indexed: 01/17/2024]
Abstract
Tibetan kefir grains (TKGs) are a complex protein-lipid-polysaccharide matrix composed of various microorganisms. Microorganisms have the benefit of being effective, secure, and controllable when used for selenium enrichment. In this study, selenium-enriched Tibetan kefir grains (Se-TKGs) were made, and the microbiology composition was analyzed through a metagenomic analysis, to explore the influence of selenium enrichment. The microbial composition of TKGs and Se-TKGs, as well as the probiotic species, quorum sensing system (QS) and functional genes were compared and evaluated. Lactobacillus kefiranofaciens was the most abundant microbial species in both communities. Compared with TKGs, Se-TKGs had a much higher relative abundance of acetic acid bacteria. Lactobacillus helveticus was the most common probiotic species both in TKGs and Se-TKGs. Probiotics with antibacterial and anti-inflammatory properties were more abundant in Se-TKGs. QS analysis revealed that Se-TKGs contained more QS system-associated genes than TKGs. Moreover, Kyoto Encyclopedia of Genes and Genomes analysis revealed that the pathway for human disease ko01501 had the greatest relative abundance in both TKGs and Se-TKGs. Compared with TKGs, Se-TKGs demonstrated a greater relative abundance of different drug resistance-related metabolic pathways. Additionally, linear discriminant analysis effect size was used to examine the biomarkers responsible for the difference between the two groups. In this study, we focused on the microbiological structure of TKGs and Se-TKGs, with the aim of establishing a foundation for a more thorough investigation of Se-TKGs and providing a basis for exploring potential future use.
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Affiliation(s)
- Ke Chen
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China; College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
| | - Jinyi Yang
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China.
| | - Xinyuan Guo
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China.
| | - Weiyu Han
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China.
| | - Huijuan Wang
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China.
| | - Xuejun Zeng
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
| | - Zhouli Wang
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China.
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China; College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A & F University, Yangling, 712100, China; College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
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2
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Lin Y, Hu L, Li X, Ma J, Li Q, Yuan X, Zhang Y. The beneficial and toxic effects of selenium on zebrafish. A systematic review of the literature. Toxicol Res (Camb) 2024; 13:tfae062. [PMID: 38645626 PMCID: PMC11031411 DOI: 10.1093/toxres/tfae062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/27/2024] [Accepted: 04/07/2024] [Indexed: 04/23/2024] Open
Abstract
Selenium is an important and essential trace element in organisms, but its effects on organisms are also a "double-edged sword". Selenium deficiency or excess can endanger the health of humans and animals. In order to thoroughly understand the nutritional value and toxicity hazards of selenium, researchers have conducted many studies on the model animal zebrafish. However, there is a lack of induction and summary of relevant research on which selenium acts on zebrafish. This paper provides a review of the reported studies. Firstly, this article summarizes the benefits of selenium on zebrafish from three aspects: Promoting growth, Enhancing immune function and anti-tumor ability, Antagonizing some pollutants, such as mercury. Then, three aspects of selenium toxicity to zebrafish are introduced: nervous system and behavior, reproductive system and growth, and damage to some organs. This article also describes how different forms of selenium compounds have different effects on zebrafish health. Finally, prospects for future research directions are presented.
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Affiliation(s)
- Yuanshan Lin
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Liyun Hu
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Xinhang Li
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Jie Ma
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Qipeng Li
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Xiaofan Yuan
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Yuan Zhang
- Department of Orthopedic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
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3
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Jia J, Liu Q, Liu H, Yang C, Zhao Q, Xu Y, Wu W. Structure characterization and antioxidant activity of abalone visceral peptides-selenium in vitro. Food Chem 2024; 433:137398. [PMID: 37683490 DOI: 10.1016/j.foodchem.2023.137398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/31/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023]
Abstract
Peptide-selenium chelate is widely regarded as one of the best selenium supplements for relieving selenium deficiency. In this study, abalone visceral peptides (AVP) was used to prepare a new type of peptides-selenium chelate to develop an organic selenium supplement with antioxidant activity. AVP prepared by alcalase exhibited the highest selenium-chelating ability. UV-visible spectroscopy, fluorescence spectroscopy, Fourier transform infrared spectroscopy and other structural analysis showed that selenium was mainly bound to the functional groups of -NH, -OH, -CH, CC, CO, and CN bonds on AVP. The formation of AVP-selenium chelate enhanced thermal stability and generated a new crystal structure. The ABTS•+ and •OH scavenging activities of AVP-selenium chelate were increased after in vitro digestion than that of AVP. Conclusively, this study analyzed the chelating mechanism of AVP and selenium from a structural perspective, which would provide a theoretical basis for the development of new selenium supplements.
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Affiliation(s)
- Jiao Jia
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Qing Liu
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Huimin Liu
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Chunyu Yang
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Qi Zhao
- SKL of Marine Food Processing & Safety Control, Dalian Polytechnic University, Dalian 116034, China; National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Yu Xu
- SKL of Marine Food Processing & Safety Control, Dalian Polytechnic University, Dalian 116034, China; National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Wenfei Wu
- SKL of Marine Food Processing & Safety Control, Dalian Polytechnic University, Dalian 116034, China; National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
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4
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Shi D, Xu S, Ding D, Tang K, Zhou Y, Jiang X, Wang S, Liu X, Zhan P. Advances in drug structure-activity-relationships for the development of selenium-based compounds against HIV. Expert Opin Drug Discov 2024; 19:139-146. [PMID: 37988053 DOI: 10.1080/17460441.2023.2284830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/14/2023] [Indexed: 11/22/2023]
Abstract
INTRODUCTION Selenium possesses numerous advantageous properties in the field of medicine, and a variety of selenium-containing compounds have been documented to exhibit anti-HIV activity. This paper aims to categorize these compounds and conduct SAR analysis to offer guidance for drug design and optimization. AREAS COVERED The authors present a comprehensive review of the reported SAR analysis conducted on selenium-based compounds against HIV, accompanied by a concise discussion regarding the pivotal role of selenium in drug development. EXPERT OPINION In addition to the conventional bioisosterism strategy, advanced strategies such as covalent inhibition, fragment-based growth and drug repositioning can also be incorporated into research on selenium-containing anti-HIV drugs. Ebselen, which acts as an HIV capsid inhibitor, serves as a valuable probe compound for the discovery of novel HIV integrase inhibitors. Furthermore, it is crucial not to underestimate the potential toxicity associated with organic selenium compounds despite no reported instances of severe toxicity.
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Affiliation(s)
- Dazhou Shi
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Shujing Xu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Dang Ding
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Kai Tang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Yang Zhou
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Xiangyi Jiang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Shuo Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Xinyong Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Peng Zhan
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
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5
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Yang R, Zheng R, Song J, Liu H, Yu S, Liu J. Speciation of Selenium Nanoparticles and Other Selenium Species in Soil: Simple Extraction Followed by Membrane Separation and ICP-MS Determination. Anal Chem 2024; 96:471-479. [PMID: 38116615 DOI: 10.1021/acs.analchem.3c04577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The application of selenium nanoparticle (SeNP)-based fertilizers can cause SeNPs to enter the soil environment. Considering the possible transformation of SeNPs and the species-dependent toxicity of selenium (Se), accurate analysis of SeNPs and other Se species present in the soil would help rationally assess the potential hazards of SeNPs to soil organisms. Herein, a novel method for speciation of SeNPs and other Se species in soil was established. Under the optimized conditions, SeNPs, selenite, selenate, and seleno amino acid could be simultaneously extracted from the soil with mixtures of tetrasodium pyrophosphate (5 mM) and potassium dihydrogen phosphate (1.2 μM), while inert Se species (mainly metal selenide) remained in the soil. Then, extracted SeNPs can be effectively captured by a nylon membrane (0.45 μm) and quantified by inductively coupled plasma mass spectrometry (ICP-MS). Other extracted Se species can be separated and quantified by high-performance liquid chromatography coupled with ICP-MS. Based on the difference between the total Se contents and extracted Se contents, the amount of metal selenide can be calculated. The limits of detection of the method were 0.02 μg/g for SeNPs, 0.05 μg/g for selenite, selenate, and selenocystine, and 0.25 μg/g for selenomethionine, respectively. Spiking experiments also showed that our method was applicable to real soil sample analysis. The present method contributes to understanding the speciation of Se in the soil environment and further estimating the occurrence and application risks of SeNPs.
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Affiliation(s)
- Rui Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ronggang Zheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiangyun Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Hao Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sujuan Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingfu Liu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
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6
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Preliminary Structural Characterization of Selenium Nanoparticle Composites Modified by Astragalus Polysaccharide and the Cytotoxicity Mechanism on Liver Cancer Cells. Molecules 2023; 28:molecules28041561. [PMID: 36838549 PMCID: PMC9961785 DOI: 10.3390/molecules28041561] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/30/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023] Open
Abstract
Astragalus alcohol soluble polysaccharide (AASP) could present superior water solubility and antitumor activity with high concentration. Selenium nanoparticles (SeNPs) have received growing attention in various fields, but their unstable property increases the application difficulties. In the present study, functionalized nano-composites (AASP-SeNPs) were synthesized through SeNPs using AASP (average molecular weight of 2.1 × 103 Da) as a surface modifier, and the preliminary structural characteristics and inhibitory mechanism on liver cancer (HepG2) cells were investigated. Results showed that AASP-SeNPs prepared under a sodium selenite/AASP mass ratio of 1/20 (w/w) were uniformly spherical with a mean grain size of 49.80 nm and exhibited superior dispersivity and stability in water solution. Moreover, the composites could dose-dependently inhibit HepG2 cell proliferation and induce apoptosis through effectively regulating mitochondria-relevant indicators including ΔΨm depletion stimulation, intracellular ROS accumulation, Bax/Bcl-2 ratio improvement, and Cytochrome c liberation promotion. These results provide scientific references for future applications in functional food and drug industries.
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7
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Wiegand J, Avila-Barnard S, Nemarugommula C, Lyons D, Zhang S, Stapleton HM, Volz DC. Triphenyl phosphate-induced pericardial edema in zebrafish embryos is dependent on the ionic strength of exposure media. ENVIRONMENT INTERNATIONAL 2023; 172:107757. [PMID: 36680802 PMCID: PMC9974852 DOI: 10.1016/j.envint.2023.107757] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/11/2023] [Accepted: 01/14/2023] [Indexed: 06/17/2023]
Abstract
Pericardial edema is commonly observed in zebrafish embryo-based chemical toxicity screens, and a mechanism underlying edema may be disruption of embryonic osmoregulation. Therefore, the objective of this study was to identify whether triphenyl phosphate (TPHP) - a widely used aryl phosphate ester-based flame retardant - induces pericardial edema via impacts on osmoregulation within embryonic zebrafish. In addition to an increase in TPHP-induced microridges in the embryonic yolk sac epithelium, an increase in ionic strength of exposure media exacerbated TPHP-induced pericardial edema when embryos were exposed from 24 to 72 h post-fertilization (hpf). However, there was no difference in embryonic sodium concentrations in situ within TPHP-exposed embryos relative to embryos exposed to vehicle (0.1% DMSO) from 24 to 72 hpf. Interestingly, increasing the osmolarity of exposure media with mannitol (an osmotic diuretic which mitigates TPHP-induced pericardial edema) and increasing the ionic strength of the exposure media (which exacerbates TPHP-induced pericardial edema) did not affect embryonic doses of TPHP, suggesting that TPHP uptake was not altered under these varying experimental conditions. Overall, our findings suggest that TPHP-induced pericardial edema within zebrafish embryos is dependent on the ionic strength of exposure media, underscoring the importance of further standardization of exposure media and embryo rearing protocols in zebrafish-based chemical toxicity screening assays.
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Affiliation(s)
- Jenna Wiegand
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Sarah Avila-Barnard
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Charvita Nemarugommula
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - David Lyons
- Department of Environmental Sciences, University of California, Riverside, CA 92521, United States
| | - Sharon Zhang
- Division of Environmental Sciences and Policy, Duke University, Durham, NC 27708, United States
| | - Heather M Stapleton
- Division of Environmental Sciences and Policy, Duke University, Durham, NC 27708, United States
| | - David C Volz
- Division of Environmental Sciences and Policy, Duke University, Durham, NC 27708, United States.
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Selenium Intake and its Interaction with Iron Intake Are Associated with Cognitive Functions in Chinese Adults: A Longitudinal Study. Nutrients 2022; 14:nu14153005. [PMID: 35893861 PMCID: PMC9332607 DOI: 10.3390/nu14153005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/12/2022] [Accepted: 07/20/2022] [Indexed: 11/17/2022] Open
Abstract
Studies on the relation between selenium intake and cognitive function are inconclusive. This study aimed to examine the associations between dietary selenium intake and cognitive function among Chinese adults and tested the interaction effect of selenium intake and iron intake on cognition. Data from 4852 adults aged 55 years and above who attended the 1991–2006 China Health and Nutrition Survey (CHNS) were used. Cognitive function was assessed through face-to-face interviews in 1997, 2000, 2004, and 2006. A 3-day, 24-hour recall was used to collect dietary selenium intake. Multivariable mixed linear regression and logistic regression were used in the analyses. In fully adjusted regression models, the regression coefficients (95% confidence interval) were 0.00, 0.29 (−0.12–0.70), 0.26 (−0.18–0.70), and 0.50 (0.02–0.97) across the quartiles of selenium intake. In the subgroup analysis, the positive association between selenium intake and cognitive function was only observed in the participants who live in the southern region but not those in the northern region. The selenium-intake-to-iron-intake ratio was inversely associated with low global cognition scores. Furthermore, only those with a normal BMI had a positive association between selenium and cognition. In conclusion, high selenium intake was linked to better cognitive function and a lower risk of cognition decline in Chinese adults among those with low iron intake. A substantial interaction was found between selenium intake and BMI or region.
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Tan J, Tang H, Xu Q, Zheng Y, Su D, He S, Zeng Q, Yuan Y. The Formation of Egg White
Polypeptide‐Selenium
complex particles: Mechanism, Stability and Functional Properties. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Jin‐Chao Tan
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Hong‐Yan Tang
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Qing‐Ling Xu
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Ying‐Min Zheng
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Dong‐Xiao Su
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Shan He
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Qing‐Zhu Zeng
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
| | - Yang Yuan
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 PR China
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10
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Zhang X, He H, Xiang J, Hou T. Screening and bioavailability evaluation of anti-oxidative selenium-containing peptides from soybeans based on specific structures. Food Funct 2022; 13:5252-5261. [PMID: 35438695 DOI: 10.1039/d2fo00113f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our previous study has evaluated the antioxidant capacity and identified the sequences of soybean selenium-containing peptides. Herein, pharmacophore screening, gastrointestinal simulation and in vivo pharmacokinetics were performed to predict the potentials of selenium-containing peptides in terms of antioxidant activity, safety and bioavailability. A pharmacophore model with 6 structure features was constructed for virtual screening to determine the potential activities of 85 selenium sequences from soybean peptides. Strong reversing effects (p < 0.05) of the targeted sequences were observed in tumor necrosis factor-α (TNF-α)-induced inflammatory cytokines and adhesion factors burst in EA·hy926/Caco-2 co-culture cell models. Ser-Phe-Gln-SeMet (SFQSeM), a promising peptide selected from both virtual screening and cell models, was proved to be stable in the gastrointestinal tract and could be transported across the Caco-2 monolayer via the paracellular pathway. Additionally, SFQSeM showed a long residence time (89.42 ± 1.34 min) and half-life (81.60 ± 11.88 min) after consumption, and it induced lower liver alanine/aspartate transaminase (ALT/AST) and serum nitric oxide (NO) levels compared to Na2SeO3 and SeMet (p < 0.05). The potency of SFQSeM against oxidative stress as well as its oral bioavailability and low risk highlight its potential utility as an effective Se nutritional supplement.
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Affiliation(s)
- Xing Zhang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Hui He
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jiqian Xiang
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, China
| | - Tao Hou
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, China
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11
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Lanctôt CM, Cresswell T, Lombi E, Bennett WW. Synchrotron-Based Imaging Reveals the Fate of Selenium in Striped Marsh Frog Tadpoles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11848-11858. [PMID: 34382781 DOI: 10.1021/acs.est.1c02028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Synchrotron-based X-ray fluorescence microscopy (XFM) coupled with X-ray absorption near-edge structure (XANES) imaging was used to study selenium (Se) biodistribution and speciation in Limnodynastes peronii tadpoles. Tadpoles were exposed to dissolved Se (30 μg/L) as selenite (SeIV) or selenate (SeVI) for 7 days followed by 3 days of depuration. High-resolution elemental maps revealed that Se partitioned primarily in the eyes (specifically the eye lens, iris, and retinal pigmented epithelium), digestive and excretory organs of SeIV-exposed tadpoles. Speciation analysis confirmed that the majority of accumulated Se was converted to organo-Se. Multielement analyses provided new information on Se colocalization and its impact on trace element homeostasis. New insights into the fate of Se on a whole organism scale contribute to our understanding of the mechanisms and risks associated with Se pollution.
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Affiliation(s)
- Chantal M Lanctôt
- Australian Rivers Institute, Griffith University, Southport, Queensland 4215, Australia
- School of Environment and Science, Griffith University, Southport, Queensland 4215, Australia
| | - Tom Cresswell
- Australian Nuclear Science and Technology Organisation (ANSTO), Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Enzo Lombi
- Future Industries Institute, University of South Australia, Adelaide, South Australia 5095, Australia
| | - William W Bennett
- School of Environment and Science, Griffith University, Southport, Queensland 4215, Australia
- Coastal and Marine Research Centre, Cities Research Institute, Griffith University, Southport, Queensland 4215, Australia
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12
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Nehzati S, Dolgova NV, James AK, Cotelesage JJH, Sokaras D, Kroll T, George GN, Pickering IJ. High Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy: An Analytical Method for Selenium Speciation. Anal Chem 2021; 93:9235-9243. [PMID: 34164981 DOI: 10.1021/acs.analchem.1c01503] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Selenium is in many ways an enigmatic element. It is essential for health but toxic in excess, with the difference between the two doses being narrower than for any other element. Environmentally, selenium is of concern due to its toxicity. As the rarest of the essential elements, its low levels often provide challenges to the analytical chemist. X-ray absorption spectroscopy (XAS) provides a powerful tool for in situ chemical speciation but is severely limited by poor spectroscopic resolution arising from core-hole lifetime broadening. Here we explore selenium Kα1 high energy resolution fluorescence detected XAS (HERFD-XAS) as a novel approach for chemical speciation of selenium, in comparison with conventional Se K-edge XAS. We present spectra of a range of selenium species relevant to environmental and life science studies, including spectra of seleno-amino acids, which show strong similarities with S K-edge XAS of their sulfur congeners. We discuss strengths and limitations of HERFD-XAS, showing improvements in both speciation performance and low concentration detection. We also develop a simple method to correct fluorescence self-absorption artifacts, which is generally applicable to any HERFD-XAS experiment.
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Affiliation(s)
- Susan Nehzati
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Natalia V Dolgova
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Ashley K James
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.,Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B3, Canada
| | - Julien J H Cotelesage
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Graham N George
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.,Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B3, Canada.,Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Ingrid J Pickering
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.,Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B3, Canada.,Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
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13
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Naderi M, Puar P, Zonouzi-Marand M, Chivers DP, Niyogi S, Kwong RWM. A comprehensive review on the neuropathophysiology of selenium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 767:144329. [PMID: 33445002 DOI: 10.1016/j.scitotenv.2020.144329] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/05/2020] [Accepted: 12/05/2020] [Indexed: 05/25/2023]
Abstract
As an essential micronutrient, selenium (Se) exerts its biological function as a catalytic entity in a variety of enzymes. From a toxicological perspective, however, Se can become extremely toxic at concentrations slightly above its nutritional levels. Over the last few decades, there has been a growing level of concern worldwide regarding the adverse effects of both inorganic and organic Se compounds on a broad spectrum of neurological functions. A wealth of evidence has shown that exposure to excess Se may compromise the normal functioning of various key proteins, neurotransmitter systems (the glutamatergic, dopaminergic, serotonergic, and cholinergic systems), and signaling molecules involved in the control and regulation of cognitive, behavioral, and neuroendocrine functions. Elevated Se exposure has also been suspected to be a risk factor for the development of several neurodegenerative and neuropsychiatric diseases. Nonetheless, despite the various deleterious effects of excess Se on the central nervous system (CNS), Se neurotoxicity and negative behavioral outcomes are still disregarded at the expense of its beneficial health effects. This review focuses on the current state of knowledge regarding the neurobehavioral effects of Se and discusses its potential mode of action on different aspects of the central and peripheral nervous systems. This review also provides a brief history of Se discovery and uses, its physicochemical properties, biological roles in the CNS, environmental occurrence, and toxicity. We also review potential links between exposure to different forms of Se compounds and aberrant neurobehavioral functions in humans and animals, and identify key knowledge gaps and hypotheses for future research.
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Affiliation(s)
- Mohammad Naderi
- Department of Biology, York University, Toronto, ON M3J 1P3, Canada.
| | - Pankaj Puar
- Department of Biology, York University, Toronto, ON M3J 1P3, Canada
| | | | - Douglas P Chivers
- Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada
| | - Som Niyogi
- Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada; Toxicology Centre, University of Saskatchewan, 44 Campus Drive, Saskatoon, SK S7N 5B3, Canada
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14
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Halbach K, Holbrook T, Reemtsma T, Wagner S. Effective processing and evaluation of chemical imaging data with respect to morphological features of the zebrafish embryo. Anal Bioanal Chem 2021; 413:1675-1687. [PMID: 33523257 PMCID: PMC7921040 DOI: 10.1007/s00216-020-03131-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/01/2020] [Accepted: 12/15/2020] [Indexed: 01/16/2023]
Abstract
A workflow was developed and implemented in a software tool for the automated combination of spatially resolved laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) data and data on the morphology of the biological tissue. Making use of a recently published biological annotation software, FishImager automatically assigns the biological feature as regions of interest (ROIs) and overlays them with the quantitative LA-ICP-MS data. Furthermore, statistical tools including cluster algorithms can be applied to the elemental intensity data and directly compared with the ROIs. This is effectively visualized in heatmaps. This allows gaining statistical significance on distribution and co-localization patterns. Finally, the biological functions of the assigned ROIs can then be easily linked with elemental distributions. We demonstrate the versatility of FishImager with quantitative LA-ICP-MS data of the zebrafish embryo tissue. The distribution of natural elements and xenobiotics is analyzed and discussed. With the help of FishImager, it was possible to identify compartments affected by toxicity effects or biological mechanisms to eliminate the xenobiotic. The presented workflow can be used for clinical and ecotoxicological testing, for example. Ultimately, it is a tool to simplify and reproduce interpretations of imaging LA-ICP-MS data in many applications. ![]()
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Affiliation(s)
- Katharina Halbach
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research - UFZ, 04318, Leipzig, Germany
| | - Timothy Holbrook
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research - UFZ, 04318, Leipzig, Germany
| | - Thorsten Reemtsma
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research - UFZ, 04318, Leipzig, Germany.,Institute of Analytical Chemistry, University of Leipzig, 04103, Leipzig, Germany
| | - Stephan Wagner
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research - UFZ, 04318, Leipzig, Germany. .,Institute for Water and Energy Management, University of Applied Sciences Hof, 95028, Hof, Germany.
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15
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Wischhusen P, Arnaudguilhem C, Bueno M, Vallverdu G, Bouyssiere B, Briens M, Antony Jesu Prabhu P, Geraert PA, Kaushik SJ, Fauconneau B, Fontagné-Dicharry S, Mounicou S. Tissue localization of selenium of parental or dietary origin in rainbow trout (Oncorhynchus mykiss) fry using LA-ICP MS bioimaging. Metallomics 2020; 13:6054542. [PMID: 33595655 DOI: 10.1093/mtomcs/mfaa008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/30/2020] [Accepted: 12/16/2020] [Indexed: 12/13/2022]
Abstract
In relation to the decrease of selenium (Se) content in aquafeeds, the impact of level and form of parental and dietary Se supplementation was investigated in rainbow trout fry using laser ablation-inductively coupled plasma mass spectrometry (LA-ICP MS) bioimaging. The offspring of rainbow trout broodstock, fed either a control diet without any Se supplementation (0.3 mg Se/kg diet) or a diet supplemented with Se (0.6 mg Se/kg diet) either as sodium selenite or hydroxy-selenomethionine, were sampled at swim-up fry stage or after 11 weeks of cross-feeding. Total body Se levels were influenced by parental Se nutrition in swim-up fry and by direct Se feeding in 11-week fry with higher levels in the Se-supplemented groups compared with the control and the highest levels in the hydroxy-selenomethionine treatment. The Se retention was lower for dietary sodium selenite. Selenomethionine levels increased when Se was provided as hydroxy-selenomethionine. LA-ICP MS maps revealed yolk in swim-up fry and intestine, liver, and kidney in 11-week fed fry as tissues with high Se abundance. In swim-up fry, muscle Se was the highest abundant when parents were fed hydroxy-selenomethionine. In 11-week fed fry, muscle Se abundance was higher in the head part of fry fed both Se-supplemented diets, but only in the tail part of fry fed hydroxy-selenomethionine. Liver Se abundance was higher in fry fed sodium selenite compared with the control diet supporting the hypothesis that tissue Se distribution can be influenced by parental and dietary Se forms and levels.
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Affiliation(s)
- Pauline Wischhusen
- INRAE, Université de Pau et des Pays de l'Adour, E2S UPPA, NUMEA, 64310 Saint Pée sur Nivelle, France
| | - Carine Arnaudguilhem
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR5254, 64000 Pau, France
| | - Maïté Bueno
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR5254, 64000 Pau, France
| | - Germain Vallverdu
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR5254, 64000 Pau, France
| | - Brice Bouyssiere
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR5254, 64000 Pau, France
| | - Mickael Briens
- ADISSEO, 10 Place du Général de Gaulle, 92160 Antony, France
| | | | | | - Sadasivam J Kaushik
- INRAE, Université de Pau et des Pays de l'Adour, E2S UPPA, NUMEA, 64310 Saint Pée sur Nivelle, France
| | - Benoit Fauconneau
- INRAE, Université de Pau et des Pays de l'Adour, E2S UPPA, NUMEA, 64310 Saint Pée sur Nivelle, France
| | | | - Sandra Mounicou
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR5254, 64000 Pau, France
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16
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Cao W, McCallum NC, Ni QZ, Li W, Boyce H, Mao H, Zhou X, Sun H, Thompson MP, Battistella C, Wasielewski MR, Dhinojwala A, Shawkey MD, Burkart MD, Wang Z, Gianneschi NC. Selenomelanin: An Abiotic Selenium Analogue of Pheomelanin. J Am Chem Soc 2020; 142:12802-12810. [DOI: 10.1021/jacs.0c05573] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Cao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Department of Materials Science and Engineering, Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Naneki C. McCallum
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Qing Zhe Ni
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States of America
| | - Weiyao Li
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States of America
| | - Hannah Boyce
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Haochuan Mao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Institute for Sustainability and Energy, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Xuhao Zhou
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Hao Sun
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Department of Materials Science and Engineering, Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Matthew P. Thompson
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Department of Materials Science and Engineering, Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Claudia Battistella
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Department of Materials Science and Engineering, Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Michael R. Wasielewski
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Institute for Sustainability and Energy, Northwestern University, Evanston, Illinois 60208, United States of America
| | - Ali Dhinojwala
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States of America
| | - Matthew D. Shawkey
- Evolution and Optics of Nanostructures Group, Department of Biology, The University of Ghent, 9000 Ghent, Belgium
| | - Michael D. Burkart
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States of America
| | - Zheng Wang
- Center for Bio/Molecular Science and Engineering, US Naval Research Laboratory, Washington, D.C. 20375, United States of America
| | - Nathan C. Gianneschi
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States of America
- Department of Materials Science and Engineering, Department of Biomedical Engineering, Department of Pharmacology, International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, Northwestern University, Evanston, Illinois 60208, United States of America
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17
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Development, structure characterization and stability of food grade selenium nanoparticles stabilized by tilapia polypeptides. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2019.109878] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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18
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Dolgova NV, Nehzati S, MacDonald TC, Summers KL, Crawford AM, Krone PH, George GN, Pickering IJ. Disruption of selenium transport and function is a major contributor to mercury toxicity in zebrafish larvae. Metallomics 2020; 11:621-631. [PMID: 30688331 DOI: 10.1039/c8mt00315g] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mercury is one of the most toxic elements threatening the biosphere, with levels steadily rising due to both natural and human activities. Selenium is an essential micronutrient, required for normal development and functioning of many organisms. While selenium is known to counteract mercury's toxicity under some conditions, to date information about the mercury-selenium relationship is fragmented and often controversial. As part of a systematic study of mercury and selenium interactions, zebrafish (Danio rerio) larvae (a model verterbrate) were exposed to methylmercury chloride or mercuric chloride. The influence of pre- and post-treatment of selenomethionine on the level and distribution of mercury and selenium in the brain and eye sections, as well as on toxicity, were examined. Selenomethionine treatment decreased the amount of maternally transfered mercury in the larval brain. Selenomethionine treatment prior to exposure to mercuric chloride increased both mercury and selenium levels in the brain but decreased their toxic effects. Conversely, methylmercury levels were not changed as a result of selenium pre-treatment, while toxicity was increased. Strikingly, both forms of mercury severely disrupted selenium metabolism, not only by depleting selenium levels due to formation of Hg-Se complexes, but also by blocking selenium transport into and out of tissues, suggesting that restoring normal selenium levels by treating the organism with selenium after mercury exposure may not be possible. Disruption of selenium metabolism by mercury may lead to disruption in function of selenoproteins. Indeed, the production of thyroid hormones by selenoprotein deiodinases was found to be severely impaired as a result of mercury exposure, with selenomethionine not always being a suitable source of selenium to restore thyroid hormone levels.
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Affiliation(s)
- Natalia V Dolgova
- Molecular and Environment Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.
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19
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Abstract
PURPOSE OF REVIEW Selenium, a trace element, is ubiquitous in the environment. The main source of human exposure is diet. Despite its nutritional benefits, it is one of the most toxic naturally occurring elements. Selenium deficiency and overexposure have been associated with adverse health effects. Its level of toxicity may depend on its chemical form, as inorganic and organic species have distinct biological properties. RECENT FINDINGS Nonexperimental and experimental studies have generated insufficient evidence for a role of selenium deficiency in human disease, with the exception of Keshan disease, a cardiomyopathy. Conversely, recent randomized trials have indicated that selenium overexposure is positively associated with type 2 diabetes and high-grade prostate cancer. In addition, a natural experiment has suggested an association between overexposure to inorganic hexavalent selenium and two neurodegenerative diseases, amyotrophic lateral sclerosis and Parkinson's disease. Risk assessments should be revised to incorporate the results of studies demonstrating toxic effects of selenium. Additional observational studies and secondary analyses of completed randomized trials are needed to address the uncertainties regarding the health risks of selenium exposure.
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20
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Rohn I, Raschke S, Aschner M, Tuck S, Kuehnelt D, Kipp A, Schwerdtle T, Bornhorst J. Treatment of Caenorhabditis elegans with Small Selenium Species Enhances Antioxidant Defense Systems. Mol Nutr Food Res 2019; 63:e1801304. [PMID: 30815971 PMCID: PMC6499701 DOI: 10.1002/mnfr.201801304] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/28/2019] [Indexed: 01/10/2023]
Abstract
SCOPE Small selenium (Se) species play a key role in Se metabolism and act as dietary sources of the essential trace element. However, they are redox-active and trigger pro- and antioxidant responses. As health outcomes are strongly species-dependent, species-specific characteristics of Se compounds are tested in vivo. METHODS AND RESULTS In the model organism Caenorhabditis elegans (C. elegans), immediate and sustained effects of selenite, selenomethionine (SeMet), and Se-methylselenocysteine (MeSeCys) are studied regarding their bioavailability, incorporation into proteins, as well as modulation of the cellular redox status. While all tested Se compounds are bioavailable, only SeMet persistently accumulates and is non-specifically incorporated into proteins. However, the protection toward chemically-induced formation of reactive species is independent of the applied Se compound. Increased thioredoxin reductase (TXNRD) activity and changes in mRNA expression levels of antioxidant proteins indicate the activation of cellular defense mechanisms. However, in txnrd-1 deletion mutants, no protective effects of the Se species are observed anymore, which is also reflected by differential gene expression data. CONCLUSION Se species protect against chemically-induced reactive species formation. The identified immediate and sustained systemic effects of Se species give rise to speculations on possible benefits facing subsequent periods of inadequate Se intake.
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Affiliation(s)
- Isabelle Rohn
- Institute of Nutritional Science, University of Potsdam, 14558, Nuthetal, Germany
| | - Stefanie Raschke
- Institute of Nutritional Science, University of Potsdam, 14558, Nuthetal, Germany
| | | | - Simon Tuck
- Umeå Centre for Molecular Medicine, Umeå University, 90187, Umeå, Sweden
| | - Doris Kuehnelt
- Institute of Chemistry, Analytical Chemistry, NAWI Graz, University of Graz, 8010, Graz, Austria
| | - Anna Kipp
- Institute of Nutrition, Friedrich Schiller University Jena, 07743, Jena, Germany
- TraceAge - DFG Research Unit FOR 2558, Berlin-Potsdam-Jena, Germany
| | - Tanja Schwerdtle
- Institute of Nutritional Science, University of Potsdam, 14558, Nuthetal, Germany
- TraceAge - DFG Research Unit FOR 2558, Berlin-Potsdam-Jena, Germany
| | - Julia Bornhorst
- Institute of Nutritional Science, University of Potsdam, 14558, Nuthetal, Germany
- TraceAge - DFG Research Unit FOR 2558, Berlin-Potsdam-Jena, Germany
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, 42119, Wuppertal, Germany
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21
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Rohn I, Marschall TA, Kroepfl N, Jensen KB, Aschner M, Tuck S, Kuehnelt D, Schwerdtle T, Bornhorst J. Selenium species-dependent toxicity, bioavailability and metabolic transformations in Caenorhabditis elegans. Metallomics 2019; 10:818-827. [PMID: 29770420 DOI: 10.1039/c8mt00066b] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The essential micronutrient selenium (Se) is required for various systemic functions, but its beneficial range is narrow and overexposure may result in adverse health effects. Additionally, the chemical form of the ingested selenium contributes crucially to its health effects. While small Se species play a major role in Se metabolism, their toxicological effects, bioavailability and metabolic transformations following elevated uptake are poorly understood. Utilizing the tractable invertebrate Caenorhabditis elegans allowed for an alternative approach to study species-specific characteristics of organic and inorganic Se forms in vivo, revealing remarkable species-dependent differences in the toxicity and bioavailability of selenite, selenomethionine (SeMet) and Se-methylselenocysteine (MeSeCys). An inverse relationship was found between toxicity and bioavailability of the Se species, with the organic species displaying a higher bioavailability than the inorganic form, yet being less toxic. Quantitative Se speciation analysis with HPLC/mass spectrometry revealed a partial metabolism of SeMet and MeSeCys. In SeMet exposed worms, identified metabolites were Se-adenosylselenomethionine (AdoSeMet) and Se-adenosylselenohomocysteine (AdoSeHcy), while worms exposed to MeSeCys produced Se-methylselenoglutathione (MeSeGSH) and γ-glutamyl-MeSeCys (γ-Glu-MeSeCys). Moreover, the possible role of the sole selenoprotein in the nematode, thioredoxin reductase-1 (TrxR-1), was studied comparing wildtype and trxr-1 deletion mutants. Although a lower basal Se level was detected in trxr-1 mutants, Se toxicity and bioavailability following acute exposure was indistinguishable from wildtype worms. Altogether, the current study demonstrates the suitability of C. elegans as a model for Se species dependent toxicity and metabolism, while further research is needed to elucidate TrxR-1 function in the nematode.
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Affiliation(s)
- Isabelle Rohn
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany.
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22
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Sant KE, Timme-Laragy AR. Zebrafish as a Model for Toxicological Perturbation of Yolk and Nutrition in the Early Embryo. Curr Environ Health Rep 2019; 5:125-133. [PMID: 29417450 DOI: 10.1007/s40572-018-0183-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW Developmental toxicity assessments often focus on structural outcomes and overlook subtle metabolic differences which occur during the early embryonic period. Deviant embryonic nutrition can result in later-life disease, including diabetes, obesity, and cardiovascular disease. Prior to placenta-mediated nutrient exchange, the human embryo requires maternally supplied nutritional substrates for growth, called yolk. Here, we compare the biology of the human and zebrafish yolk and review examples of toxicant-mediated perturbation of yolk defects, composition, and utilization. RECENT FINDINGS Zebrafish embryos, like human embryos, have a protruding yolk sac that serves as a nutritional cache. Aberrant yolk morphology is a common qualitative finding in fish embryotoxicity studies, but quantitative assessment and characterization provides an opportunity to uncover mechanistic targets of toxicant effects on embryonic nutrition. The zebrafish and the study of its yolk sac is an excellent model for uncovering toxicant disruptions to early embryonic nutrition and has potential to discover mechanistic insights into the developmental origins of health and disease.
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Affiliation(s)
- Karilyn E Sant
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, Goessman 171, 686 N Pleasant St, Amherst, MA, 01003, USA
| | - Alicia R Timme-Laragy
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, Goessman 171, 686 N Pleasant St, Amherst, MA, 01003, USA.
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23
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Ren Y, Xu B, Zhong Z, Pittman CU, Zhou A. Using SeO2 as a selenium source to make RSe-substituted aniline and imidazo[1,2-a]pyridine derivatives. Org Chem Front 2019. [DOI: 10.1039/c9qo00299e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A mild and practical method is developed for the synthesis of ArSe-substituted aniline and imidazo[1,2-a]pyridine derivatives using SeO2 as a selenium agent.
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Affiliation(s)
- Yaokun Ren
- Pharmacy School
- Jiangsu University
- Zhenjiang City
- China
| | - Baojun Xu
- Pharmacy School
- Jiangsu University
- Zhenjiang City
- China
| | - Zijian Zhong
- Pharmacy School
- Jiangsu University
- Zhenjiang City
- China
| | | | - Aihua Zhou
- Pharmacy School
- Jiangsu University
- Zhenjiang City
- China
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24
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Filippini T, Michalke B, Mandrioli J, Tsatsakis AM, Weuve J, Vinceti M. Selenium Neurotoxicity and Amyotrophic Lateral Sclerosis: An Epidemiologic Perspective. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/978-3-319-95390-8_12] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Kieliszek M, Błażejak S, Piwowarek K, Brzezicka K. Equilibrium modeling of selenium binding from aqueous solutions by Candida utilis ATCC 9950 yeasts. 3 Biotech 2018; 8:388. [PMID: 30175025 PMCID: PMC6111034 DOI: 10.1007/s13205-018-1415-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/21/2018] [Indexed: 11/26/2022] Open
Abstract
The study investigated the effectiveness of selenium binding from its salt solution by Candida utilis ATCC 9950 yeast biomass cultured on a medium prepared from the agro-food industry wastes, containing an available source of carbon and nitrogen. Selenium binding by C. utilis yeast strain after 48 h of culturing at 28 °C from aqueous solutions with the addition of 30 mg Se/L reached a value of 2.28 mg Se/g of yeast biomass. The kinetics of selenium binding by the yeasts showed a better fit for the pseudo-second-order kinetic model compared to the pseudo-first-order one. Accumulation stability data were analyzed using the Freundlich and Langmuir isotherm models. The presence of competing anions such as SO 4 2 - , and HPO 4 2 - at a concentration of 0.5 mM resulted in about 35% reduction of selenium binding by the examined C. utilis strain. FTIR analysis showed that sulfur compounds were involved in selenium biosorption by the yeast. Compounds containing ammonium groups appeared to be very important for selenium binding. The results of the study demonstrated that the yeast can be used to effectively bind selenium from aqueous solution. At the same time, it gives the opportunity to obtain a biomass rich in this deficient element, which can also be used in dietary supplement production.
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Affiliation(s)
- Marek Kieliszek
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences−SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland
| | - Stanisław Błażejak
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences−SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland
| | - Kamil Piwowarek
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences−SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland
| | - Katarzyna Brzezicka
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences−SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland
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26
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Dolgova NV, Nehzati S, Choudhury S, MacDonald TC, Regnier NR, Crawford AM, Ponomarenko O, George GN, Pickering IJ. X-ray spectroscopy and imaging of selenium in living systems. Biochim Biophys Acta Gen Subj 2018; 1862:2383-2392. [PMID: 29729308 DOI: 10.1016/j.bbagen.2018.04.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/24/2018] [Accepted: 04/27/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Selenium is an essential element with a rich and varied chemistry in living organisms. It plays a variety of important roles ranging from being essential in enzymes that are critical for redox homeostasis to acting as a deterrent for herbivory in hyperaccumulating plants. Despite its importance there are many open questions, especially related to its chemistry in situ within living organisms. SCOPE OF REVIEW This review discusses X-ray spectroscopy and imaging of selenium in biological samples, with an emphasis on the methods, and in particular the techniques of X-ray absorption spectroscopy (XAS) and X-ray fluorescence imaging (XFI). We discuss the experimental methods and capabilities of XAS and XFI, and review their advantages and their limitations. A perspective on future possibilities and next-generation of experiments is also provided. MAJOR CONCLUSIONS XAS and XFI provide powerful probes of selenium chemistry, together with unique in situ capabilities. The opportunities and capabilities of the next generation of advanced X-ray spectroscopy experiments are particularly exciting. GENERAL SIGNIFICANCE XAS and XFI provide versatile tools that are generally applicable to any element with a convenient X-ray absorption edge, suitable for investigating complex systems essentially without pre-treatment.
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Affiliation(s)
- Natalia V Dolgova
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Susan Nehzati
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Sanjukta Choudhury
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Tracy C MacDonald
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Nathan R Regnier
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N0X2, Canada
| | - Andrew M Crawford
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Olena Ponomarenko
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada
| | - Graham N George
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada; Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N0X2, Canada.
| | - Ingrid J Pickering
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N5E2, Canada; Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N0X2, Canada.
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27
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Vinceti M, Chiari A, Eichmüller M, Rothman KJ, Filippini T, Malagoli C, Weuve J, Tondelli M, Zamboni G, Nichelli PF, Michalke B. A selenium species in cerebrospinal fluid predicts conversion to Alzheimer's dementia in persons with mild cognitive impairment. ALZHEIMERS RESEARCH & THERAPY 2017; 9:100. [PMID: 29258624 PMCID: PMC5735937 DOI: 10.1186/s13195-017-0323-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/20/2017] [Indexed: 12/13/2022]
Abstract
Background Little is known about factors influencing progression from mild cognitive impairment to Alzheimer’s dementia. A potential role of environmental chemicals and specifically of selenium, a trace element of nutritional and toxicological relevance, has been suggested. Epidemiologic studies of selenium are lacking, however, with the exception of a recent randomized trial based on an organic selenium form. Methods We determined concentrations of selenium species in cerebrospinal fluid sampled at diagnosis in 56 participants with mild cognitive impairment of nonvascular origin. We then investigated the relation of these concentrations to subsequent conversion from mild cognitive impairment to Alzheimer’s dementia. Results Twenty-one out of the 56 subjects developed Alzheimer’s dementia during a median follow-up of 42 months; four subjects developed frontotemporal dementia and two patients Lewy body dementia. In a Cox proportional hazards model adjusting for age, sex, duration of sample storage, and education, an inorganic selenium form, selenate, showed a strong association with Alzheimer’s dementia risk, with an adjusted hazard ratio of 3.1 (95% confidence interval 1.0–9.5) in subjects having a cerebrospinal fluid content above the median level, compared with those with lower concentration. The hazard ratio of Alzheimer’s dementia showed little departure from unity for all other inorganic and organic selenium species. These associations were similar in analyses that measured exposure on a continuous scale, and also after excluding individuals who converted to Alzheimer’s dementia at the beginning of the follow-up. Conclusions These results indicate that higher amounts of a potentially toxic inorganic selenium form in cerebrospinal fluid may predict conversion from mild cognitive impairment to Alzheimer’s dementia. Electronic supplementary material The online version of this article (doi:10.1186/s13195-017-0323-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marco Vinceti
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy. .,Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy. .,Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA.
| | - Annalisa Chiari
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Marcel Eichmüller
- Helmholtz Zentrum München GmbH-German Research Center for Environmental Health GmbH, Research Unit Analytical BioGeoChemistry, 1 Ingolstaedter Landstrasse, Neuherberg, 85764, Germany
| | - Kenneth J Rothman
- Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA.,Research Triangle Institute, Research Triangle Park, 3040 E Cornwallis Road, Durham, NC, 27709, USA
| | - Tommaso Filippini
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Carlotta Malagoli
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Jennifer Weuve
- Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA
| | - Manuela Tondelli
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Giovanna Zamboni
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Paolo F Nichelli
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Bernhard Michalke
- Helmholtz Zentrum München GmbH-German Research Center for Environmental Health GmbH, Research Unit Analytical BioGeoChemistry, 1 Ingolstaedter Landstrasse, Neuherberg, 85764, Germany
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28
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MacDonald TC, Sylvain NJ, James AK, Pickering IJ, Krone PH, George GN. Effects of inorganic mercury on the olfactory pits of zebrafish larvae. Metallomics 2017; 8:514-7. [PMID: 27108745 DOI: 10.1039/c6mt00031b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mercury compounds are highly toxic; due to the rising levels of mercury pollution, both human and environmental exposure to mercury are increasing. Occupational exposure to inhaled mercury can be high, causing adverse effects not only in the lungs, but in the olfactory system as well. Olfaction plays a critical role in the survival of fish and other vertebrates, and impaired olfaction can substantially impact human quality of life. We present a study of the effects of mercury exposure in the olfactory pits of zebrafish larvae using a combination of X-ray fluorescence imaging and immunohistochemistry. We show that mercury accumulates in the sensory cells of the olfactory pits and also that it may also damage primary neurons, such as those that innervate olfactory pits.
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Affiliation(s)
- Tracy C MacDonald
- Molecular and Environmental Science Research Group, Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada. and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada and Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Nicole J Sylvain
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Ashley K James
- Molecular and Environmental Science Research Group, Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada. and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada and Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Ingrid J Pickering
- Molecular and Environmental Science Research Group, Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada. and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada and Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada
| | - Patrick H Krone
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada and Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Graham N George
- Molecular and Environmental Science Research Group, Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada. and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada and Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada
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Mandrioli J, Michalke B, Solovyev N, Grill P, Violi F, Lunetta C, Conte A, Sansone VA, Sabatelli M, Vinceti M. Elevated Levels of Selenium Species in Cerebrospinal Fluid of Amyotrophic Lateral Sclerosis Patients with Disease-Associated Gene Mutations. NEURODEGENER DIS 2017; 17:171-180. [PMID: 28478440 DOI: 10.1159/000460253] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/06/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Although an increasing role of genetic susceptibility has been recognized, the role of environmental risk factors in amyotrophic lateral sclerosis (ALS) etiology is largely uncertain; among neurotoxic chemicals, epidemiological and biological plausibility has been provided for pesticides, the heavy metal lead, the metalloid selenium, and other persistent organic pollutants. Selenium involvement in ALS has been suggested on the basis of epidemiological studies, in vitro investigations, and veterinary studies in which selenium induced a selective toxicity against motor neurons. OBJECTIVE Hypothesizing a multistep pathogenic mechanism (genetic susceptibility and environmental exposure), we aimed to study selenium species in ALS patients carrying disease-associated gene mutations as compared to a series of hospital controls. METHODS Using advanced analytical techniques, we determined selenium species in cerebrospinal fluid sampled at diagnosis in 9 ALS patients carrying different gene mutations (C9ORF72, SOD1, FUS, TARDBP, ATXN2, and TUBA4A) compared to 42 controls. RESULTS In a patient with the tubulin-related TUBA4A mutation, we found highly elevated levels (in μg/L) of glutathione-peroxidase-bound selenium (32.8 vs. 1.0) as well as increased levels of selenoprotein-P-bound selenium (2.4 vs. 0.8), selenite (1.8 vs. 0.1), and selenate (0.9 vs. 0.1). In the remaining ALS patients, we detected elevated selenomethionine-bound selenium levels (0.38 vs. 0.06). CONCLUSIONS Selenium compounds can impair tubulin synthesis and the cytoskeleton structure, as do tubulin-related gene mutations. The elevated selenium species levels in the TUBA4A patient may have a genetic etiology and/or represent a pathogenic pathway through which this mutation favors disease onset, though unmeasured confounding cannot be excluded. The elevated selenomethionine levels in the other patients are also of interest due to the toxicity of this nonphysiological selenium species. Our study is the first to assess selenium exposure in genetic ALS, suggesting an interaction between this environmental factor and genetics in triggering disease onset.
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Affiliation(s)
- Jessica Mandrioli
- Department of Neurosciences, St. Agostino-Estense Hospital and Local Health Unit of Modena, Modena, Italy
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30
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Vinceti M, Filippini T, Cilloni S, Bargellini A, Vergoni AV, Tsatsakis A, Ferrante M. Health risk assessment of environmental selenium: Emerging evidence and challenges (Review). Mol Med Rep 2017; 15:3323-3335. [PMID: 28339083 PMCID: PMC5428396 DOI: 10.3892/mmr.2017.6377] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/20/2017] [Indexed: 12/22/2022] Open
Abstract
New data have been accumulated in the scientific literature in recent years which allow a more adequate risk assessment of selenium with reference to human health. This new evidence comes from environmental studies, carried out in populations characterized by abnormally high or low selenium intakes, and from high-quality and large randomized controlled trials with selenium recently carried out in the US and in other countries. These trials have consistently shown no beneficial effect on cancer and cardiovascular risk, and have yielded indications of unexpected toxic effects of selenium exposure. Overall, these studies indicate that the minimal amount of environmental selenium which is source of risk to human health is much lower than anticipated on the basis of older studies, since toxic effects were shown at levels of intake as low as around 260 µg/day for organic selenium and around 16 µg/day for inorganic selenium. Conversely, populations with average selenium intake of less than 13–19 µg/day appear to be at risk of a severe cardiomyopathy, Keshan disease. Overall, there is the need to reconsider the selenium standards for dietary intake, drinking water, outdoor and indoor air levels, taking into account the recently discovered adverse health effects of low-dose selenium overexposure, and carefully assessing the significance of selenium-induced proteomic changes.
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Affiliation(s)
- Marco Vinceti
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Tommaso Filippini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Cilloni
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Annalisa Bargellini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Anna Valeria Vergoni
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Aristides Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Heraklion, Crete, Greece
| | - Margherita Ferrante
- Department of Medical, Surgical Sciences and Advanced Technologies 'G.F. Ingrassia', University of Catania, Catania, Italy
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Vinceti M, Ballotari P, Steinmaus C, Malagoli C, Luberto F, Malavolti M, Rossi PG. Long-term mortality patterns in a residential cohort exposed to inorganic selenium in drinking water. ENVIRONMENTAL RESEARCH 2016; 150:348-356. [PMID: 27344266 DOI: 10.1016/j.envres.2016.06.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/21/2016] [Accepted: 06/06/2016] [Indexed: 06/06/2023]
Abstract
Selenium (Se) is a metalloid of considerable nutritional and toxicological importance in humans. To date, limited epidemiologic evidence exists about the health effects of exposure to this trace element in drinking water. We investigated the relationship between Se levels in water and mortality in the municipality of Reggio Emilia, Italy, where high levels of Se were previously observed in drinking water. From 1974 to 1985, 2065 residents consumed drinking water with Se levels close to the European standard of 10μg/l, in its inorganic hexavalent form (selenate). Follow-up was conducted for the years 1986-2012 in Reggio Emilia and a lesser exposed comparison group of around 100,000 municipal residents, with comparable socio-demographic characteristics. Overall mortality from all causes, cardiovascular disease and cancer showed little evidence of differences. However, excess rate ratios were seen for some site specific cancers such as neoplasms of buccal cavity and pharynx, urinary tract, lymphohematopoietic tissue, melanoma, and two neurodegenerative diseases, Parkinson's disease and amyotrophic lateral sclerosis. Excess mortality in the exposed cohort for specific outcomes was concentrated in the first period of follow-up (1986-1997), and waned starting 10 years after the high exposure ended. We also found lower mortality from breast cancer in females during the first period of follow-up. When we extended the analysis to include residents who had been consuming the high-selenium drinking water for a shorter period, mortality rate ratios were also increased, but to a lesser extent. Overall, we found that the mortality patterns related to long-term exposure to inorganic hexavalent selenium through drinking water were elevated for several site-specific cancers and neurodegenerative disease.
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Affiliation(s)
- Marco Vinceti
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, University of Modena and Reggio Emilia, Reggio Emilia, Italy.
| | - Paola Ballotari
- Interinstitutional Epidemiology Unit, Local Health Authority, Reggio Emilia and Arcispedale S. Maria Nuova, IRCCS, Reggio Emilia, Italy
| | - Craig Steinmaus
- Department of Epidemiology, UC Berkeley School of Public Health, Berkeley, CA, United States
| | - Carlotta Malagoli
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, University of Modena and Reggio Emilia, Reggio Emilia, Italy
| | - Ferdinando Luberto
- Interinstitutional Epidemiology Unit, Local Health Authority, Reggio Emilia and Arcispedale S. Maria Nuova, IRCCS, Reggio Emilia, Italy
| | - Marcella Malavolti
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, University of Modena and Reggio Emilia, Reggio Emilia, Italy
| | - Paolo Giorgi Rossi
- Interinstitutional Epidemiology Unit, Local Health Authority, Reggio Emilia and Arcispedale S. Maria Nuova, IRCCS, Reggio Emilia, Italy
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