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Tiganescu E, Abdin AY, Razouk A, Nasim MJ, Jacob C. The redox riddle of selenium sulfide. Curr Opin Chem Biol 2023; 76:102365. [PMID: 37463529 DOI: 10.1016/j.cbpa.2023.102365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/13/2023] [Accepted: 06/16/2023] [Indexed: 07/20/2023]
Abstract
Selenium sulfide, in analogy with selenium dioxide, is often considered as SeS2. At closer inspection, however, selenium sulfide represents a large family of rather complicated molecules which differ depending on the mode of preparation. Together, these compounds share extraordinarily low solubility in virtually any solvent with a biological activity rather impressive for such simple molecules. The surface reactivity of such microscopic and nanoscopic materials, prepared chemically or by fermentation, may provide an answer to this riddle and explain activities by a combination of physical, redox, metal binding, covalent, and non-covalent interactions with biomolecules and cells.
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Affiliation(s)
- Eduard Tiganescu
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany
| | - Ahmad Yaman Abdin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany
| | - Afraa Razouk
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany
| | - Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
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2
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Edwards EH, Jelušić J, Kosko RM, McClelland KP, Ngarnim SS, Chiang W, Lampa-Pastirk S, Krauss TD, Bren KL. Shewanella oneidensis MR-1 respires CdSe quantum dots for photocatalytic hydrogen evolution. Proc Natl Acad Sci U S A 2023; 120:e2206975120. [PMID: 37068259 PMCID: PMC10151509 DOI: 10.1073/pnas.2206975120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 03/21/2023] [Indexed: 04/19/2023] Open
Abstract
Living bio-nano systems for artificial photosynthesis are of growing interest. Typically, these systems use photoinduced charge transfer to provide electrons for microbial metabolic processes, yielding a biosynthetic solar fuel. Here, we demonstrate an entirely different approach to constructing a living bio-nano system, in which electrogenic bacteria respire semiconductor nanoparticles to support nanoparticle photocatalysis. Semiconductor nanocrystals are highly active and robust photocatalysts for hydrogen (H2) evolution, but their use is hindered by the oxidative side of the reaction. In this system, Shewanella oneidensis MR-1 provides electrons to a CdSe nanocrystalline photocatalyst, enabling visible light-driven H2 production. Unlike microbial electrolysis cells, this system requires no external potential. Illuminating this system at 530 nm yields continuous H2 generation for 168 h, which can be lengthened further by replenishing bacterial nutrients.
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Affiliation(s)
- Emily H. Edwards
- Department of Chemistry, University of Rochester, Rochester, NY14627
| | - Jana Jelušić
- Department of Chemistry, University of Rochester, Rochester, NY14627
| | - Ryan M. Kosko
- Department of Chemistry, University of Rochester, Rochester, NY14627
| | | | - Soraya S. Ngarnim
- Department of Chemistry, University of Rochester, Rochester, NY14627
| | - Wesley Chiang
- Department of Biochemistry and Biophysics, University of Rochester, Rochester, NY14627
| | | | - Todd D. Krauss
- Department of Chemistry, University of Rochester, Rochester, NY14627
- Department of Optics, University of Rochester, Rochester, NY14627
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, NY14627
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3
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Martin JT, Chai T, Leshuk TMC, Young ZW, Gu F. Photocatalytic treatment of organoselenium in synthetic mine-impacted effluents. Water Sci Technol 2023; 87:1250-1258. [PMID: 36919746 DOI: 10.2166/wst.2023.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Biological selenium reduction processes are commonly employed as the best available technology (BAT) for selenium removal; however, as a by-product they produce trace amounts of organoselenium compounds with orders of magnitude greater bioaccumulation potential and toxicity. Here, we assessed buoyant photocatalysts (BPCs) as a potential passive advanced oxidation process (P-AOP) for organoselenium treatment. Using a synthetic mine-impacted water solution, spiked with selenomethionine (96 μg/L) as a representative organoselenium compound, photocatalysis with BPCs fully eliminated selenomethionine to <0.01 μg/L with conversion to selenite and selenate. A theoretical reaction pathway was inferred, and a kinetics model developed to describe the treatment trends and intermediates. Given the known toxic responses of Lepomis macrochirus and Daphnia magna to organoselenium, it was estimated that photocatalysis could effectively eliminate organoselenium acute toxicity within a UV dose of 8 kJ/L (1-2 days solar equivalent exposure), by transformation of selenomethionine to less hazardous oxidized Se species. Solar photocatalysis may therefore be a promising passive treatment technology for selenium-impacted mine water management.
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Affiliation(s)
| | - Tia Chai
- H2nanO Inc., Kitchener, ON N2G 1H6, Canada E-mail: ,
| | - Timothy Michael Carter Leshuk
- H2nanO Inc., Kitchener, ON N2G 1H6, Canada E-mail: , ; Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3E5, Canada
| | | | - Frank Gu
- H2nanO Inc., Kitchener, ON N2G 1H6, Canada E-mail: , ; Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3E5, Canada
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4
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Song B, Weijma J, Buisman CJN, van der Weijden RD. How sulfur species can accelerate the biological immobilization of the toxic selenium oxyanions and promote stable hexagonal Se 0 formation. J Hazard Mater 2022; 437:129367. [PMID: 35897181 DOI: 10.1016/j.jhazmat.2022.129367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 06/07/2022] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Toxic selenium oxyanions and sulfur species are often jointly present in contaminated waters and soils. This study investigated the effect on kinetics and resulting products for bio-reduction of selenium oxyanions in the presence of biologically produced sulfur resulting from bio-oxidation of sulfide in (bio)gas-desulfurization (bio-S0) and of sulfate. Selenite and selenate (~2 mmol L-1) bio-reduction was studied in batch up to 28 days at 30 oC and pH 7 using lactic acid and a sulfate-reducing sludge, 'Emmtec'. Bio-S0 addition increased the selenite removal rate, but initially slightly decreased selenate reduction rates. Selenite reacted with biologically generated sulfide resulting in selenium-sulfur, which upon further bio-reduction creates a sulfur bio-reduction cycle. Sulfate addition increased the bio-reduction rate for both selenite and sulfate. Bio-S0 or sulfate promoted hexagonal selenium formation, whereas without these, mostly amorphous Se0 resulted. With another inoculum, 'Eerbeek', bio-S0 accelerated the selenite reduction rate less than for 'Emmtec' because of lower sulfur and higher selenite bio-reduction rates. Bio-S0 addition increased the selenate reduction rate slightly and accelerated hexagonal selenium formation. Hexagonal selenium formation is advantageous because it facilitates separation and recovery and is less mobile and toxic than amorphous Se0. Insights into the interaction between selenium and sulfur bio-reduction are valuable for understanding environmental pathways and considerations regarding remediation and recovery.
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Affiliation(s)
- B Song
- Department of Environmental Technology, Wageningen University and Research, the Netherlands
| | - J Weijma
- Department of Environmental Technology, Wageningen University and Research, the Netherlands
| | - C J N Buisman
- Department of Environmental Technology, Wageningen University and Research, the Netherlands
| | - R D van der Weijden
- Department of Environmental Technology, Wageningen University and Research, the Netherlands.
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5
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Zhou J, Zhang B, Wang H, Wang D, Zhang M, Zhang M, Wang X, Fan S, Xu Y, Zeng Q, Jia Y, Xi J, Nan X, He L, Zhou X, Li S, Zhong W, Yue W, Pei X. A Functional Screening Identifies a New Organic Selenium Compound Targeting Cancer Stem Cells: Role of c-Myc Transcription Activity Inhibition in Liver Cancer. Adv Sci (Weinh) 2022; 9:e2201166. [PMID: 35652264 PMCID: PMC9353477 DOI: 10.1002/advs.202201166] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/05/2022] [Indexed: 05/04/2023]
Abstract
Cancer stem cells (CSCs) are reported to play essential roles in chemoresistance and metastasis. Pathways regulating CSC self-renewal and proliferation, such as Hedgehog, Notch, Wnt/β-catenin, TGF-β, and Myc, may be potential therapeutic targets. Here, a functional screening from the focused library with 365 compounds is performed by a step-by-step strategy. Among these candidate molecules, phenyl-2-pyrimidinyl ketone 4-allyl-3-amino selenourea (CU27) is chosen for further identification because it proves to be the most effective compound over others on CSC inhibition. Through ingenuity pathway analysis, it is shown CU27 may inhibit CSC through a well-known stemness-related transcription factor c-Myc. Gene set enrichment analysis, dual-luciferase reporter assays, expression levels of typical c-Myc targets, molecular docking, surface plasmon resonance, immunoprecipitation, and chromatin immunoprecipitation are conducted. These results together suggest CU27 binds c-Myc bHLH/LZ domains, inhibits c-Myc-Max complex formation, and prevents its occupancy on target gene promoters. In mouse models, CU27 significantly sensitizes sorafenib-resistant tumor to sorafenib, reduces the primary tumor size, and inhibits CSC generation, showing a dramatic anti-metastasis potential. Taken together, CU27 exerts inhibitory effects on CSC and CSC-associated traits in hepatocellular carcinoma (HCC) via c-Myc transcription activity inhibition. CU27 may be a promising therapeutic to treat sorafenib-resistant HCC.
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Affiliation(s)
- Jun‐Nian Zhou
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Biao Zhang
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Hai‐Yang Wang
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Dong‐Xing Wang
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
| | - Ming‐Ming Zhang
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
| | - Min Zhang
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Xiao‐Kui Wang
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Shi‐Yong Fan
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Ying‐Chen Xu
- Department of Hepatobiliary SurgeryBeijing Tongren HospitalBeijing100730P. R. China
| | - Quan Zeng
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Ya‐Li Jia
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Jia‐Fei Xi
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Xue Nan
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Li‐Juan He
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Xin‐Bo Zhou
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Song Li
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Wu Zhong
- National Engineering Research Center for the Emergency DrugBeijing Institute of Pharmacology and ToxicologyBeijing100850P. R. China
| | - Wen Yue
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
| | - Xue‐Tao Pei
- Stem Cell and Regenerative Medicine LabBeijing Institute of Radiation MedicineBeijing100850P. R. China
- South China Research Center for Stem Cell and Regenerative MedicineSCIBGuangzhou510005P. R. China
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Krakowiak A, Czernek L, Pichlak M, Kaczmarek R. Intracellular HINT1-Assisted Hydrolysis of Nucleoside 5'- O-Selenophosphate Leads to the Release of Hydrogen Selenide That Exhibits Toxic Effects in Human Cervical Cancer Cells. Int J Mol Sci 2022; 23:ijms23020607. [PMID: 35054788 PMCID: PMC8775712 DOI: 10.3390/ijms23020607] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 12/31/2021] [Accepted: 01/02/2022] [Indexed: 12/20/2022] Open
Abstract
In this study, we present a new selenium derivative, 2′-deoxyguanosine-5′-O-selenophosphate (dGMPSe), synthesized by the oxathiaphospholane method and adapted here for the synthesis of nucleoside selenophosphates. Using biochemical assays (HPLC- and fluorescence-based), we investigated the enzymatic activity of HINT1 towards dGMPSe in comparison with the corresponding thiophosphate nucleoside, i.e., dGMPS. Both substrates showed similar kcat and a small difference in Km, and during the reactions the release of reducing agents such as H2Se and H2S were expected and detected. MTT viability assay and microscopic analysis showed that dGMPSe was toxic to HeLa cancer cells, and this cytotoxicity was due to the release of H2Se. The release of H2Se or H2S in the living cells after administration of dGMPSe and/or dGMPS, both without carrier and by electroporation, was observed using a fluorescence assay, as previously for NMPS. In conclusion, our comparative experiments with dGMPSe and dGMPS indicate that the HINT1 enzyme is capable of converting (d)NMPSe to (d)NMP and H2Se, both in vitro and intracellularly. Since the anticancer activity of various selenium compounds depends on the formation of hydrogen selenide, the actual inducer of cell death, we propose that selenium-containing nucleotides represent another option as novel compounds with anticancer therapeutic potential.
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7
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Hao S, Zhong S, Ji X, Pang KY, Wang N, Li H, Jiang Y, Lim KG, Chong TC, Zhao R, Loke DK. Activating Silent Synapses in Sulfurized Indium Selenide for Neuromorphic Computing. ACS Appl Mater Interfaces 2021; 13:60209-60215. [PMID: 34878241 DOI: 10.1021/acsami.1c19062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The transformation from silent to functional synapses is accompanied by the evolutionary process of human brain development and is essential to hardware implementation of the evolutionary artificial neural network but remains a challenge for mimicking silent to functional synapse activation. Here, we developed a simple approach to successfully realize activation of silent to functional synapses by controlled sulfurization of chemical vapor deposition-grown indium selenide crystals. The underlying mechanism is attributed to the migration of sulfur anions introduced by sulfurization. One of our most important findings is that the functional synaptic behaviors can be modulated by the degree of sulfurization and temperature. In addition, the essential synaptic behaviors including potentiation/depression, paired-pulse facilitation, and spike-rate-dependent plasticity are successfully implemented in the partially sulfurized functional synaptic device. The developed simple approach of introducing sulfur anions in layered selenide opens an effective new avenue to realize activation of silent synapses for application in evolutionary artificial neural networks.
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Affiliation(s)
- Song Hao
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
- Department of Science, Mathematics and Technology, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Shuai Zhong
- Department of Precision Instrument, Center for Brain Inspired Computing Research, Beijing Innovation Center for Future Chip, Tsinghua University, Beijing 100084, China
| | - Xinglong Ji
- Department of Precision Instrument, Center for Brain Inspired Computing Research, Beijing Innovation Center for Future Chip, Tsinghua University, Beijing 100084, China
| | - Khin Yin Pang
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Nan Wang
- Department of Science, Mathematics and Technology, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Huimin Li
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Yu Jiang
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Kian Guan Lim
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Tow Chong Chong
- Department of Engineering Product Design, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Rong Zhao
- Department of Precision Instrument, Center for Brain Inspired Computing Research, Beijing Innovation Center for Future Chip, Tsinghua University, Beijing 100084, China
| | - Desmond K Loke
- Department of Science, Mathematics and Technology, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
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8
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Abstract
Functions of selenium are diverse as antioxidant, anti-inflammation, increased immunity, reduced cancer incidence, blocking tumor invasion and metastasis, and further clinical application as treatment with radiation and chemotherapy. These functions of selenium are mostly related to oxidation and reduction mechanisms of selenium metabolites. Hydrogen selenide from selenite, and methylselenol (MSeH) from Se-methylselenocyteine (MSeC) and methylseleninicacid (MSeA) are the most reactive metabolites produced reactive oxygen species (ROS); furthermore, these metabolites may involve in oxidizing sulfhydryl groups, including glutathione. Selenite also reacted with glutathione and produces hydrogen selenide via selenodiglutathione (SeDG), which induces cytotoxicity as cell apoptosis, ROS production, DNA damage, and adenosine-methionine methylation in the cellular nucleus. However, a more pronounced effect was shown in the subsequent treatment of sodium selenite with chemotherapy and radiation therapy. High doses of sodium selenite were effective to increase radiation therapy and chemotherapy, and further to reduce radiation side effects and drug resistance. In our study, advanced cancer patients can tolerate until 5000 μg of sodium selenite in combination with radiation and chemotherapy since the half-life of sodium selenite may be relatively short, and, further, selenium may accumulates more in cancer cells than that of normal cells, which may be toxic to the cancer cells. Further clinical studies of high amount sodium selenite are required to treat advanced cancer patients.
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Affiliation(s)
- Seung Jo Kim
- Sangkyungwon Integrate Medical Caner Hospital, Yeoju 12616, Gyeonggido, Korea;
| | - Min Chul Choi
- Comprehensive Gynecological Cancer Center, CHA Bundang Medical Center, Seongnam 13497, Gyeonggido, Korea;
| | - Jong Min Park
- Oriental Medicine, Daejeon University, Daejeon 34520, Korea;
| | - An Sik Chung
- Department of Biological Sciences, Korea Advanced Institute of Science and technology, Daejeon 34141, Korea
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Tuo QZ, Masaldan S, Southon A, Mawal C, Ayton S, Bush AI, Lei P, Belaidi AA. Characterization of Selenium Compounds for Anti-ferroptotic Activity in Neuronal Cells and After Cerebral Ischemia-Reperfusion Injury. Neurotherapeutics 2021; 18:2682-2691. [PMID: 34498224 PMCID: PMC8804037 DOI: 10.1007/s13311-021-01111-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2021] [Indexed: 02/05/2023] Open
Abstract
The emergence of ferroptosis as a cell death pathway associated with brain disorders including stroke and neurodegenerative diseases emphasizes the need to develop therapeutics able to target the brain and to protect neurons from ferroptotic death. Selenium plays an essential role in reducing lipid peroxidation generated during ferroptosis through its incorporation into the catalytic site of glutathione peroxidase 4. Here, we compared the anti-ferroptotic activity of several organic and inorganic selenium compounds: methylselenocysteine, selenocystine, selenomethionine, selenocystamine, ebselen, sodium selenite, and sodium selenate. All were effective against erastin- and RSL3-induced ferroptosis in vitro. We characterized the ability of the selenium compounds to release selenium and boost glutathione peroxidase expression and activity. Based on our results, we selected organic selenium compounds of similar characteristics and investigated their effectiveness in protecting against neuronal death in vivo using the cerebral ischemia-reperfusion injury mouse model. We found that pretreatment with methylselenocysteine or selenocystamine provided protection from ischemia-reperfusion neuronal damage in vivo. These data support the use of ferroptosis inhibitors for treatment and select selenium compounds for prevention of neuronal damage in ischemic stroke and other diseases of the brain where ferroptosis is implicated.
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Affiliation(s)
- Qing-Zhang Tuo
- Department of Neurology and State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Sichuan Province, Chengdu, 610041, China
| | - Shashank Masaldan
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia
| | - Adam Southon
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia
| | - Celeste Mawal
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia
| | - Scott Ayton
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia
| | - Ashley I Bush
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia
| | - Peng Lei
- Department of Neurology and State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Sichuan Province, Chengdu, 610041, China.
| | - Abdel Ali Belaidi
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, 3052, Australia.
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Dapkute D, Pleckaitis M, Bulotiene D, Daunoravicius D, Rotomskis R, Karabanovas V. Hitchhiking Nanoparticles: Mesenchymal Stem Cell-Mediated Delivery of Theranostic Nanoparticles. ACS Appl Mater Interfaces 2021; 13:43937-43951. [PMID: 34499462 DOI: 10.1021/acsami.1c10445] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanotechnology has emerged as a promising solution to permanent elimination of cancer. However, nanoparticles themselves lack specificity to tumors. Due to enhanced migration to tumors, mesenchymal stem cells (MSCs) were suggested as cell-mediated delivery vehicles of nanoparticles. In this study, we have constructed a complex composed of photoluminescent quantum dots (QDs) and a photosensitizer chlorin e6 (Ce6) to obtain multifunctional nanoparticles, combining cancer diagnostic and therapeutic properties. QDs serve as energy donors-excited QDs transfer energy to the attached Ce6 via Förster resonance energy transfer, which in turn generates reactive oxygen species. Here, the physicochemical properties of the QD-Ce6 complex and singlet oxygen generation were measured, and the stability in protein-rich media was evaluated, showing that the complex remains the most stable in protein-free medium. In vitro studies on MSC and cancer cell response to the QD-Ce6 complex revealed the complex-loaded MSCs' potential to transport theranostic nanoparticles and induce cancer cell death. In vivo studies proved the therapeutic efficacy, as the survival of tumor-bearing mice was statistically significantly increased, while tumor progression and metastases were slowed down.
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Affiliation(s)
- Dominyka Dapkute
- Biomedical Physics Laboratory, National Cancer Institute, P. Baublio 3B, 08406 Vilnius, Lithuania
- Life Sciences Center, Vilnius University, Sauletekio Ave. 7, 10223 Vilnius, Lithuania
| | - Marijus Pleckaitis
- Biomedical Physics Laboratory, National Cancer Institute, P. Baublio 3B, 08406 Vilnius, Lithuania
- Life Sciences Center, Vilnius University, Sauletekio Ave. 7, 10223 Vilnius, Lithuania
| | - Danute Bulotiene
- Biomedical Physics Laboratory, National Cancer Institute, P. Baublio 3B, 08406 Vilnius, Lithuania
| | - Dainius Daunoravicius
- Department of Pathology, Forensic Medicine and Pharmacology, Faculty of Medicine, Vilnius University, M. K. Ciurlionio 21/27, 03101 Vilnius, Lithuania
| | - Ricardas Rotomskis
- Biomedical Physics Laboratory, National Cancer Institute, P. Baublio 3B, 08406 Vilnius, Lithuania
- Biophotonics Group, Laser Research Centre, Vilnius University, Sauletekio Ave. 10, 10223 Vilnius, Lithuania
| | - Vitalijus Karabanovas
- Biomedical Physics Laboratory, National Cancer Institute, P. Baublio 3B, 08406 Vilnius, Lithuania
- Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, Sauletekio Ave. 11, 10221 Vilnius, Lithuania
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11
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Wang M, Ali F, Qi M, Peng Q, Wang M, Bañuelos GS, Miao S, Li Z, Dinh QT, Liang D. Insights into uptake, accumulation, and subcellular distribution of selenium among eight wheat (Triticum aestivum L.) cultivars supplied with selenite and selenate. Ecotoxicol Environ Saf 2021; 207:111544. [PMID: 33254403 DOI: 10.1016/j.ecoenv.2020.111544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/18/2020] [Accepted: 10/20/2020] [Indexed: 05/12/2023]
Abstract
Selenium (Se)-enriched wheat can be improved by altering Se sources and selecting wheat cultivars. Such improvement can affect subcellular distribution and speciation of Se in wheat. Thus, a pot experiment was conducted to investigate Se uptake and distribution when Se was applied as selenite or selenate at low and high rates (1 and 10 mg kg-1, respectively). Moreover, Se's impact on the grain and biomass yield of eight wheat cultivars was also investigated. The subcellular distribution and speciation of Se were also explored to elucidate Se metabolism and micro-distribution pattern in wheat. Results showed that biomass and grain yield were decreased with the application of both selenite and selenate in almost all the cultivars, regardless of the Se rate. Application high Se rate resulted in a significant (p < 0.05) decrease in grain yield and biomass compared with low rate of Se. Compared with the low rate of selenite application, the grain and the biomass yield of ZM-9023 significantly (p < 0.05) increased by about 15% for low rate of selenate application. In addition, both selenite and selenate treatment increased the uptake of Se in each part of wheat, compared with the control. Selenium was mostly accumulated in the grain and root of wheat under selenite treatment, while more Se accumulation was found in leaves and straw for selenate application. Further investigation on the subcellular distribution of Se showed that the proportion of Se in soluble fraction was significantly (p < 0.05) higher in wheat leaves than that in organelle fraction and cell walls (46%-66%). Meanwhile, Se6+ was the main species found in soluble fraction, whereas SeMet and MeSeCys were the species predominantly stored in organelle fraction. In conclusion, wheat cultivar ZM-9023 is the most Se-rich potential cultivar, and the isolation of Se in the soluble fraction plays an important role in Se tolerance and accumulation.
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Affiliation(s)
- Min Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Fayaz Ali
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingxing Qi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qin Peng
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Mengke Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Guangdong Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Gary S Bañuelos
- USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, Parlier, CA 93648-9757, USA
| | - Shuyin Miao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhe Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 61801 IL, USA
| | - Quang Toan Dinh
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Center for Monitoring and Environmental Protection Thanh Hoa-Department of Natural Resources and Environment of Thanh Hoa, Thanh Hoa city, Thanh Hoa, Vietnam
| | - Dongli Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
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12
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Abstract
Significance: Selenenyl sulfides (RSeSRs) and thioseleninic acids (RSeSHs) are the monoselenium (Se) analogs of disulfides and persulfides that contain Se-S bonds. These bonds are found in several antioxidant-regenerating enzymes as derivatives of selenocysteine, making them an important player in redox biology as it pertains to sulfur redox regulation. Recent Advances: Mechanistic studies of redox-regulating selenoenzymes such as thioredoxin reductase and glutathione peroxidase suggest crucial Se-S bonds in the active sites. Peptide models and small-molecule mimics of these active sites have been prepared to study their fundamental chemistry. These advances help pave the road to better understand the functions of the Se-S bond in the body. Critical Issues: The Se-S bond is unstable at atmospheric temperatures and pressures. Therefore, studying their properties proposes a major challenge. Currently, there are no trapping reagents specific to RSeSRs or RSeSHs, making their presence, identity, and fates in biological environments difficult to track. Future Directions: Further understanding of the fundamental chemistry/biochemistry of RSeSRs and RSeSHs is needed to understand what their intracellular targets are and to what extent they impact signaling. Besides antioxidant regeneration and peroxide radical reduction, the roles of RSeSR and RSeSHs in other systems need to be further explored.
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Affiliation(s)
- Akil Hamsath
- Department of Chemistry, Washington State University, Pullman, Washington, USA
| | - Ming Xian
- Department of Chemistry, Washington State University, Pullman, Washington, USA
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13
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Li W, Dong S, Chen Q, Chen C, Dong Z. Selenium may suppress peripheral blood mononuclear cell apoptosis by modulating HSP70 and regulate levels of SIRT1 through reproductive hormone secretion and oxidant stress in women suffering fluorosis. Eur J Pharmacol 2020; 878:173098. [PMID: 32275908 DOI: 10.1016/j.ejphar.2020.173098] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/18/2020] [Accepted: 04/03/2020] [Indexed: 12/16/2022]
Abstract
Excessive taking fluoride (F) causes severe damage to reproductive system through stimulation of apoptosis and oxidant stress. Selenium (Se) may promote anti-oxidant enzymes and invert cell apoptosis. The aim of this study was to investigate the effect of Se on peripheral blood mononuclear cell (PBMC) apoptosis and oxidant stress in women with fluorosis. Sixty women were divided into three groups according to serum and urine fluoride and hair Se as High F + high Se group, High F group and Control group. The activities of anti-oxidant enzymes, malondialdehyde (MDA) and Se were measured. The levels of sirtuin type 1 (SIRT1), estradiol (E2), follicle-stimulating hormone (FSH) and luteinizing hormone (LH) were measured by enzyme-linked immune sorbent assay (ELISA) kits. The expression of protein and apoptosis rate were detected by Western blot and Flow cytometry. The levels of E2, anti-oxidant enzymes in High F group were significantly lower than that in Control group, while the levels of SIRT1 and MDA were significantly higher. The levels of anti-oxidant enzymes and heat shock protein 70 (HSP70) were significantly increased in High Se + high F group while the expression of caspase-3 was significantly increased in high F group. The levels of LH and FSH in serum were significantly increased in High F group and High Se + high F group. Therefore, Se alleviates apoptosis induced by F through improving the expression of HSP70 and reduces oxidative stress by regulating levels of SIRT1 and anti-oxidant enzymes, and the secretion of certain reproductive hormones.
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Affiliation(s)
- Wenrong Li
- Department of Medical Imaging, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Siyuan Dong
- Guipei Class 55, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China.
| | - Qun Chen
- Institute of Endemic Diseases, Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, PR China.
| | - Chen Chen
- Endocrinology, School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Zhaoheng Dong
- Shandong Shenghua Electronic New Materials Co., Ltd., Yantai, Shandong, China.
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14
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Carlisle AE, Lee N, Matthew-Onabanjo AN, Spears ME, Park SJ, Youkana D, Doshi MB, Peppers A, Li R, Joseph AB, Smith M, Simin K, Zhu LJ, Greer PL, Shaw LM, Kim D. Selenium detoxification is required for cancer-cell survival. Nat Metab 2020; 2:603-611. [PMID: 32694795 PMCID: PMC7455022 DOI: 10.1038/s42255-020-0224-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 05/28/2020] [Indexed: 12/21/2022]
Abstract
The micronutrient selenium is incorporated via the selenocysteine biosynthesis pathway into the rare amino acid selenocysteine, which is required in selenoproteins such as glutathione peroxidases and thioredoxin reductases1,2. Here, we show that selenophosphate synthetase 2 (SEPHS2), an enzyme in the selenocysteine biosynthesis pathway, is essential for survival of cancer, but not normal, cells. SEPHS2 is required in cancer cells to detoxify selenide, an intermediate that is formed during selenocysteine biosynthesis. Breast and other cancer cells are selenophilic, owing to a secondary function of the cystine/glutamate antiporter SLC7A11 that promotes selenium uptake and selenocysteine biosynthesis, which, by allowing production of selenoproteins such as GPX4, protects cells against ferroptosis. However, this activity also becomes a liability for cancer cells because selenide is poisonous and must be processed by SEPHS2. Accordingly, we find that SEPHS2 protein levels are elevated in samples from people with breast cancer, and that loss of SEPHS2 impairs growth of orthotopic mammary-tumour xenografts in mice. Collectively, our results identify a vulnerability of cancer cells and define the role of selenium metabolism in cancer.
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Affiliation(s)
- Anne E Carlisle
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Namgyu Lee
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Asia N Matthew-Onabanjo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Meghan E Spears
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Sung Jin Park
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Daniel Youkana
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Mihir B Doshi
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Austin Peppers
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Rui Li
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Alexander B Joseph
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Miles Smith
- Environmental Testing and Research Laboratories, Leominster, MA, USA
| | - Karl Simin
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Lihua Julie Zhu
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Paul L Greer
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Leslie M Shaw
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Dohoon Kim
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA.
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15
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da Costa CAP, Muniz GSV, Boduch P, Rothard H, da Silveira EF. Valine Radiolysis by H +, He +, N +, and S 15+ MeV Ions. Int J Mol Sci 2020; 21:ijms21051893. [PMID: 32164330 PMCID: PMC7084508 DOI: 10.3390/ijms21051893] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 01/11/2023] Open
Abstract
Radiolysis of biomolecules by fast ions has interest in medical applications and astrobiology. The radiolysis of solid D-valine (0.2-2 μm thick) was performed at room temperature by 1.5 MeV H+, He+, N+, and 230 MeV S15+ ion beams. The samples were prepared by spraying/dropping valine-water-ethanol solution on ZnSe substrate. Radiolysis was monitored by infrared spectroscopy (FTIR) through the evolution of the intensity of the valine infrared 2900, 1329, 1271, 948, and 716 cm-1 bands as a function of projectile fluence. At the end of sample irradiation, residues (tholins) presenting a brownish color are observed. The dependence of the apparent (sputtering + radiolysis) destruction cross section, σd, on the beam stopping power in valine is found to follow the power law σd = aSen, with n close to 1. Thus, σd is approximately proportional to the absorbed dose. Destruction rates due to the main galactic cosmic ray species are calculated, yielding a million year half-life for solid valine in space. Data obtained in this work aim a better understanding on the radioresistance of complex organic molecules and formation of radioproducts.
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Affiliation(s)
- Cíntia A. P. da Costa
- Physics Department, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro 22451-900, Brazil; (C.A.P.d.C.); (E.F.d.S.)
| | | | - Philippe Boduch
- Centre de Recherche sur les Ions; les Matériaux et la Photonique. Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France;
| | - Hermann Rothard
- Centre de Recherche sur les Ions; les Matériaux et la Photonique. Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France;
- Correspondence:
| | - Enio F. da Silveira
- Physics Department, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro 22451-900, Brazil; (C.A.P.d.C.); (E.F.d.S.)
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16
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Bizerea TO, Dezsi SG, Marginean O, Stroescu R, Rogobete A, Bizerea-Spiridon O, Ilie C. The Link Between Selenium, Oxidative Stress and Pregnancy Induced Hypertensive Disorders. Clin Lab 2019; 64:1593-1610. [PMID: 30336534 DOI: 10.7754/clin.lab.2018.180307] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The first line of defence against oxidative stress (OS) are the endogenous antioxidants, such as the Se containing compounds. During pregnancy, OS is caused by the intense growth activity of the fetus; therefore, the placenta is a key place for the activity of many seleno-compounds such as glutathione-peroxidase and thioredoxinreductase. METHODS This review aims to establish the link between the type of selenium compounds, their concentration, their metabolic pathways, and their role in both physiologic and pathologic processes during pregnancy. RESULTS A review of current literature establishes that Se containing compounds have a strong antioxidant effect. The limits that define deviations from the normal concentration range of selenium are very close. Both selenium deficiency and excess have an effect on human health. It is well known that oxidative stress, namely the increase in the concentration of reactive species of oxygen and nitrogen (ROS and RNS) and the disruption of cellular redox homeostasis, are responsible for a number of inflammatory, degenerative, autoimmune, and neoplastic diseases. Selenium deficiency in the pregnant woman's body is considered a risk factor for immune deficiency, PIH, spontaneous abortions, and premature birth. In regard to the fetus, while there seems to be a certain protection against selenium-induced toxicity, studies have shown that selenium defficiency leads to IUGR and SGA newborns. Also, combined deficiency of selenium and iodine has been linked to endemic cretinism in newborns. CONCLUSIONS The antioxidant role that selenium performs through selenoproteins is major. Selenium-containing proteins, especially glutathione peroxidase, as antioxidant enzymes, are involved in regulating the ROS and RNS levels and redox balancing in almost all tissues. Among the multiple benefits of selenium in optimal concentrations in the body are stimulation and support of female fertility, as well as good development of the fetus. Hypertensive pathologies that occur in one of ten pregnant women, especially during the second part of the gestation period, are largely due to selenium deficiency.
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17
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Alburaki M, Smith KD, Adamczyk J, Karim S. Interplay between Selenium, selenoprotein genes, and oxidative stress in honey bee Apis mellifera L. J Insect Physiol 2019; 117:103891. [PMID: 31176625 PMCID: PMC7298915 DOI: 10.1016/j.jinsphys.2019.103891] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/29/2019] [Accepted: 06/01/2019] [Indexed: 05/03/2023]
Abstract
The honey bee, Apis mellifera L., is a major pollinator insect that lacks novel "selenoprotein genes", rendering it susceptible to elevated levels of Selenium (Se) occurring naturally in the environment. We investigated the effects of two inorganic forms of Se on biological traits, oxidative stress, and gene regulation. Using bioassay arenas in the laboratory, one-day old sister bees were fed ad libitum 4 different concentrations of selenate and selenite, two common inorganic forms of Se. The transcription levels of 4 honey bee antioxidant genes were evaluated, and three putative selenoprotein-like genes (SELENOT, SELENOK, SELENOF) were characterized as well as Sbp2, a Selenium binding protein required for the translation of selenoproteins mRNA. Oxidative stress and Se residues were subsequently quantified in honey bee bodies throughout the experiment. Se induced higher oxidative stress in treated honey bees leading to a significantly elevated protein carbonyl content, particularly at the highest studied concentrations. Early upregulations of Spb2 and MsrA were identified at day 2 of the treatment while all genes except SELENOT were upregulated substantially at day 8 to alleviate the Se-induced oxidative stress levels. We determined that doses between 60 and 600 mg.Se.L-1 were acutely toxic to bees (<48 h) while doses between 0.6 and 6 mg.Se.L-1 led to much lower mortality (7-16)%. Furthermore, when fed ad libitum, Se residue data indicated that bees tolerated accumulation up to 0.12 µg Se bee-1 for at least 8 days with a Se LC50 of ∼6 mg/L, a field realistic concentration found in pollen of certain plants in a high Se soil environment.
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Affiliation(s)
- Mohamed Alburaki
- The University of Southern Mississippi, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, Hattiesburg, MS 39406, USA.
| | - Kristina D Smith
- The University of Southern Mississippi, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, Hattiesburg, MS 39406, USA.
| | - John Adamczyk
- USDA-ARS Thad Cochran Horticultural Laboratory, Poplarville, MS 39470, USA.
| | - Shahid Karim
- The University of Southern Mississippi, Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, Hattiesburg, MS 39406, USA.
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18
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Carrillo-Carrion C, Bocanegra AI, Arnaiz B, Feliu N, Zhu D, Parak WJ. Triple-Labeling of Polymer-Coated Quantum Dots and Adsorbed Proteins for Tracing their Fate in Cell Cultures. ACS Nano 2019; 13:4631-4639. [PMID: 30875468 DOI: 10.1021/acsnano.9b00728] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Colloidal CdSe/ZnS quantum dots were water solubilized by overcoating with an amphiphilic polymer. Human serum albumin (HSA) as a model protein was either adsorbed or chemically linked to the surface of the polymer-coated quantum dots. As the quantum dots are intrinsically fluorescent, and as the polymer coating and the HSA were fluorescent labeled, the final nanoparticle had three differently fluorescent components: the quantum dot core, the polymer shell, and the human serum albumin corona. Cells were incubated with these hybrid nanoparticles, and after removal of non-internalized nanoparticles, exocytosis of the three components of the nanoparticles was observed individually by flow cytometry and confocal microscopy. The data indicate that HSA is partly transported with the underlying polymer-coated quantum dots into cells. Upon desorption of proteins, those initially adsorbed to the quantum dots remain longer inside cells compared to free proteins. Part of the polymer shell is released from the quantum dots by enzymatic degradation, which is on a slower time scale than protein desorption. Data are quantitatively analyzed, and experimental pitfalls, such as the impact of cell proliferation and fluorescence quenching, are discussed.
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Affiliation(s)
- Carolina Carrillo-Carrion
- CIC biomaGUNE , 20014 San Sebastian , Spain
- Centro Singular de Investigación en Química Biológica y Materiales Moleculares (CiQUS) y Departamento de Física de Partículas , Universidad de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | | | | | - Neus Feliu
- Fachbereich Physik und Chemie , Universität Hamburg , 22607 Hamburg , Germany
| | - Dingcheng Zhu
- Fachbereich Physik und Chemie , Universität Hamburg , 22607 Hamburg , Germany
| | - Wolfgang J Parak
- CIC biomaGUNE , 20014 San Sebastian , Spain
- Fachbereich Physik und Chemie , Universität Hamburg , 22607 Hamburg , Germany
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19
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Yin H, Qi Z, Li M, Ahammed GJ, Chu X, Zhou J. Selenium forms and methods of application differentially modulate plant growth, photosynthesis, stress tolerance, selenium content and speciation in Oryza sativa L. Ecotoxicol Environ Saf 2019; 169:911-917. [PMID: 30597791 DOI: 10.1016/j.ecoenv.2018.11.080] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/13/2018] [Accepted: 11/19/2018] [Indexed: 05/22/2023]
Abstract
Selenium (Se) is an essential microelement for humans and a beneficial element for plants. Recently, biofortification with Se has emerged as a key strategy to increase crop Se content. Nonetheless, Se species matters a lot as inorganic Se species is mostly toxic to human health. In this study, we investigated the effects of different forms and mode of Se application on Se accumulation and speciation in rice. The results showed that root application of Se remarkably increased Se accumulation, photosynthetic rate, biomass accumulation and tolerance to cadmium stress in rice as compared to foliar application. However, the stimulatory effects of Se varied depending on the Se species used for root feeding. At vegetative stage, root application of Se-(Methyl) selenocysteine caused the highest water extractable Se content in leaves with major contribution from organic Se species such as Se-amino acid and non-amino acid organic Se. Further investigation at reproductive stage revealed that foliar application of sodium selenite (Na2SeO3) resulted in the highest total Se content in rice seeds which was largely attributed to inorganic Se. In contrast, the root application of Na2SeO3 led to the maximum accumulation of organic Se compounds which are advantageous to human health. Moreover, the root application of Se increased antioxidant capacity and selectively enhanced amino acids and essential element content in rice grain. This study deepens our understanding of the Se species in Se-enriched rice and suggests that root application of Se may ensure the safe intake of Se through rice.
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Affiliation(s)
- Hanqin Yin
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China; School of Environmental Studies, China University of Geosciences, Lumo Road 388, Wuhan 430074, PR China
| | - Zhenyu Qi
- Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, PR China
| | - Mengqi Li
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang 471023, PR China.
| | - Xianyao Chu
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China.
| | - Jie Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, PR China.
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20
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Ewald JD, Kirk JL, Li M, Sunderland EM. Organ-specific differences in mercury speciation and accumulation across ringed seal (Phoca hispida) life stages. Science of The Total Environment 2019; 650:2013-2020. [PMID: 30290344 DOI: 10.1016/j.scitotenv.2018.09.299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/17/2018] [Accepted: 09/22/2018] [Indexed: 05/12/2023]
Abstract
Methylmercury (MeHg) is a central nervous system toxicant and exposures can adversely affect the health of marine mammals. Mercuric selenide (HgSe) in marine mammal tissues is hypothesized to result from a protective detoxification mechanism, but toxicokinetic processes contributing to its formation are poorly understood. Here, new data is reported on speciated Hg concentrations in multiple organs of n = 56 ringed seals (Phoca hispida) from Labrador, Canada, and compare concentrations to previously published data from Greenland seals. A higher proportion of Hg is found to accumulate in the kidney of young-of-the-year (YOY) ringed seals compared to adults. A toxicokinetic model for Hg species is developed and evaluated to better understand factors affecting variability in Hg concentrations among organs and across life stages. Prior work postulated that HgSe formation only occurs in the liver of mature seals, but model results suggest HgSe formation occurs across all life stages. Higher proportions of HgSe in mature seal livers compared to YOY seals likely results from the slow accumulation and elimination of HgSe (total body half-life = 500 days) compared to other Hg species. HgSe formation in the liver reduces modeled blood concentrations of MeHg by only 6%. Thus, HgSe formation may not substantially reduce MeHg transport across the blood-brain barrier of ringed seals, leaving them susceptible to the neurotoxic effects of MeHg exposure.
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Affiliation(s)
- Jessica D Ewald
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Faculty of Agricultural and Environmental Sciences, Macdonald Campus, McGill University Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada.
| | - Jane L Kirk
- Environment and Climate Change Canada, Canada Centre for Inland Waters, Burlington, Ontario L7S 1A1, Canada
| | - Miling Li
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
| | - Elsie M Sunderland
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
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21
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Chalana A, Karri R, Das R, Kumar B, Rai RK, Saxena H, Gupta A, Banerjee M, Jha KK, Roy G. Copper-Driven Deselenization: A Strategy for Selective Conversion of Copper Ion to Nanozyme and Its Implication for Copper-Related Disorders. ACS Appl Mater Interfaces 2019; 11:4766-4776. [PMID: 30644707 DOI: 10.1021/acsami.8b16786] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Synthetic organic molecules, which can selectively convert excess intracellular copper (Cu) ions to nanozymes with an ability to protect cells from oxidative stress, are highly significant in developing therapeutic agents against Cu-related disorder like Wilson's disease. Here, we report 1,3-bis(2-hydroxyethyl)-1 H-benzoimidazole-2-selenone (1), which shows a remarkable ability to remove Cu ion from glutathione, a major cytosolic Cu-binding ligand, and thereafter converts it into copper selenide (CuSe) nanozyme that exhibits remarkable glutathione peroxidase-like activity, at cellular level of H2O2 concentration, with excellent cytoprotective effect against oxidative stress in hepatocyte. Cu-driven deselenization of 1, under physiologically relevant conditions, occurred in two steps. The activation of C═Se bond by metal ion is the crucial first step, followed by cleavage of the metal-activated C═Se bond, initiated by the OH group of N-(CH2)2OH substituent through neighboring group participation (deselenization step), resulted in the controlled synthesis of various types of Cu2-xSe nanocrystals (NCs) (nanodisks, nanocubes, and nanosheets) and tetragonal Cu3Se2 NCs, depending upon the oxidation state of the Cu ion used to activate the C═Se bond. Deselenization of 1 is highly metal-selective. Except Cu, other essential metal ions, including Mn2+, Fe2+, Co2+, Ni2+, or Zn2+, failed to produce metal selenide under identical reaction conditions. Moreover, no significant change in the expression level of Cu-metabolism-related genes, including metallothioneines MT1A, is observed in liver cells co-treated with Cu and 1, as opposed to the large increase in the concentrations of these genes observed in cells treated with Cu alone, suggesting the participation of 1 in Cu homeostasis in hepatocyte.
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Hu T, Liang Y, Zhao G, Wu W, Li H, Guo Y. Selenium Biofortification and Antioxidant Activity in Cordyceps militaris Supplied with Selenate, Selenite, or Selenomethionine. Biol Trace Elem Res 2019; 187:553-561. [PMID: 29855849 DOI: 10.1007/s12011-018-1386-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 05/09/2018] [Indexed: 12/29/2022]
Abstract
Selenium (Se) is an essential trace element with multiple functions that may help mitigate adverse health conditions. Cordyceps militaris is an edible mushroom with medicinal properties. The experiment was conducted under artificial cultivation, with five Se concentrations (0, 5, 10, 20, and 40 μg g-1) and three forms of Se (selenate, selenite, and selenomethionine). C. militaris can absorb inorganic from the substrate and convert it to organic Se compounds (selenocystine, selenomethionine, and an unknown species) in fruiting bodies. Compared with the control treatment, Se applications (40 μg g-1 selenate and selenite) significantly increased the Se concentration in fruiting bodies by 130.9 and 128.1 μg g-1, respectively. The biofortification with selenate and selenite did not affect fruiting body production, in some case, but did enhance the biological efficiency. Moreover, the abundance of cordycepin and adenosine increased, while the amino acid contents remained relatively stable. Meanwhile, Se-biofortified C. militaris showed effective antioxidant activities. These results suggest that Se-biofortified C. militaris fruiting bodies may enhance human and animal health when it was included as part of a healthy diet or used as Se supplements.
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Affiliation(s)
- Ting Hu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Yue Liang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China
| | - Guishen Zhao
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Wenliang Wu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Huafen Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Yanbin Guo
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China.
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23
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Semi-artificial photosynthesis. Nat Nanotechnol 2018; 13:871. [PMID: 30291353 DOI: 10.1038/s41565-018-0290-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Combining the strengths of catalytic biomachineries with those of synthetic materials can yield more efficient and durable solar chemical conversion.
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Skalnaya MG, Jaiswal SK, Prakash R, Prakash NT, Grabeklis AR, Zhegalova IV, Zhang F, Guo X, Tinkov AA, Skalny AV. The Level of Toxic Elements in Edible Crops from Seleniferous Area (Punjab, India). Biol Trace Elem Res 2018; 184:523-528. [PMID: 29222648 DOI: 10.1007/s12011-017-1216-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/04/2017] [Indexed: 10/18/2022]
Abstract
The primary objective of the present study was to assess the level of selenium and toxic trace elements in wheat, rice, maize, and mustard from seleniferous areas of Punjab, India. The content of selenium (Se) and toxic trace elements, including aluminum (Al), arsenic (As), cadmium (Cd), mercury (Hg), nickel (Ni), lead (Pb), and tin (Sn), in crop samples was assessed using inductively coupled plasma mass-spectrometry after microwave digestion of the samples. The obtained data demonstrate that cultivation of crops on seleniferous soils significantly increased Se level in wheat, mustard, rice, and maize by a factor of more than 590, 111, 85, and 64, respectively. The study also showed that Se exposure affected toxic metal content in crops. In particular, Se-rich wheat was characterized by a significant decrease in Al, As, Ni, Pb, and Sn levels. The level of As, Cd, Ni, Pb, and Sn was significantly decreased in Se-rich rice, whereas As content was increased. In turn, the decrease in Al, As, Cd, Ni, Pb, and Sn levels in Se-rich maize was associated with a significant elevation of Hg content. Finally, Se-rich mustard was characterized by a significant increase in Al, As, and Hg levels, while the content of Ni, Pb, and Sn was significantly lower than the control levels. These findings should be taken into account while developing the nutritional strategies for correction of Se status. At the same time, the exact mechanisms underlying the observed differences are to be estimated.
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Affiliation(s)
- Margarita G Skalnaya
- Yaroslavl State University, Yaroslavl, 150000, Russia
- Peoples' Friendship University of Russia (RUDN University), Moscow, 105064, Russia
| | | | | | | | - Andrei R Grabeklis
- Yaroslavl State University, Yaroslavl, 150000, Russia
- Peoples' Friendship University of Russia (RUDN University), Moscow, 105064, Russia
| | - Irina V Zhegalova
- Peoples' Friendship University of Russia (RUDN University), Moscow, 105064, Russia
- I.M. Sechenov First Moscow State Medical University, Moscow, 119992, Russia
| | - Feng Zhang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710000, People's Republic of China
| | - Xiong Guo
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710000, People's Republic of China
| | - Alexey A Tinkov
- Yaroslavl State University, Yaroslavl, 150000, Russia
- Peoples' Friendship University of Russia (RUDN University), Moscow, 105064, Russia
- Institute of Cellular and Intracellular Symbiosis, Russian Academy of Sciences, Orenburg, 460008, Russia
| | - Anatoly V Skalny
- Yaroslavl State University, Yaroslavl, 150000, Russia.
- Peoples' Friendship University of Russia (RUDN University), Moscow, 105064, Russia.
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710000, People's Republic of China.
- Orenburg State University, Orenburg, 460352, Russia.
- Trace Element Institute for UNESCO, 69001, Lyon, France.
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Pavlovic Z, Miletic I, Zekovic M, Nikolic M, Glibetic M. Impact of Selenium Addition to Animal Feeds on Human Selenium Status in Serbia. Nutrients 2018; 10:nu10020225. [PMID: 29462952 PMCID: PMC5852801 DOI: 10.3390/nu10020225] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/10/2018] [Accepted: 02/14/2018] [Indexed: 11/16/2022] Open
Abstract
Research conducted during the 1980s demonstrated Se deficiency in humans. Increased inclusion of selenium in animal feeds started from the year 2000 onwards. The aim of this study was to estimate the effects of selenium inclusion in animal feeds on human selenium status and dietary habits of the Serbian population related to food of animal origin. Plasma selenium concentration in healthy adult volunteers, including residents of one of the regions with the lowest (Eastern Serbia, n = 60) and of one of the regions with the highest Se serum levels reported in the past (Belgrade, n = 82), was determined by hydride generation atomic absorption spectrometry. Multivariate analysis was employed to determine the correlation between Se plasma levels and dietary intake data derived from food frequency questionnaires and laboratory tests. The mean plasma Se level of the participants was 84.3 ± 15.9 μg/L (range: 47.3–132.1 μg/L), while 46% of participants had plasma Se levels lower than 80 μg/L. Frequency of meat, egg, and fish consumption was significantly correlated with plasma selenium level (r = 0.437, p = 0.000). Selenium addition to animal feed in the quantity of 0.14 mg/kg contributed to the improvement of human plasma selenium levels by approximately 30 μg/L.
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Affiliation(s)
- Zoran Pavlovic
- Institute for Public Health Pozarevac, Jovana Serbanovica 14, 12000 Pozarevac, Serbia.
| | - Ivanka Miletic
- Institute of Bromatology, Faculty of Pharmacy, Vojvode Stepe 450, 11221 Belgrade, Serbia.
| | - Milica Zekovic
- Institute for Medical Research, Centre of Research Excellence in Nutrition and Metabolism, University of Belgrade, Tadeusa Koscuska 1, 11000 Belgrade, Serbia.
| | - Marina Nikolic
- Institute for Medical Research, Centre of Research Excellence in Nutrition and Metabolism, University of Belgrade, Tadeusa Koscuska 1, 11000 Belgrade, Serbia.
| | - Maria Glibetic
- Institute for Medical Research, Centre of Research Excellence in Nutrition and Metabolism, University of Belgrade, Tadeusa Koscuska 1, 11000 Belgrade, Serbia.
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26
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Kwak SY, Giraldo JP, Wong MH, Koman VB, Lew TTS, Ell J, Weidman MC, Sinclair RM, Landry MP, Tisdale WA, Strano MS. A Nanobionic Light-Emitting Plant. Nano Lett 2017; 17:7951-7961. [PMID: 29148804 DOI: 10.1021/acs.nanolett.7b04369] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The engineering of living plants for visible light emission and sustainable illumination is compelling because plants possess independent energy generation and storage mechanisms and autonomous self-repair. Herein, we demonstrate a plant nanobionic approach that enables exceptional luminosity and lifetime utilizing four chemically interacting nanoparticles, including firefly luciferase conjugated silica (SNP-Luc), d-luciferin releasing poly(lactic-co-glycolic acid) (PLGA-LH2), coenzyme A functionalized chitosan (CS-CoA) and semiconductor nanocrystal phosphors for longer wavelength modulation. An in vitro kinetic model incorporating the release rates of the nanoparticles is developed to maximize the chemiluminescent lifetimes to exceed 21.5 h. In watercress (Nasturtium officinale) and other species, the nanoparticles circumvent limitations such as luciferin toxicity above 400 μM and colocalization of enzymatic reactions near high adenosine triphosphate (ATP) production. Pressurized bath infusion of nanoparticles (PBIN) is introduced to deliver a mixture of nanoparticles to the entire living plant, well described using a nanofluidic mathematical model. We rationally design nanoparticle size and charge to control localization within distinct tissues compartments with 10 nm nanoparticles localizing within the leaf mesophyll and stomata guard cells, and those larger than 100 nm segregated in the leaf mesophyll. The results are mature watercress plants that emit greater than 1.44 × 1012 photons/sec or 50% of 1 μW commercial luminescent diodes and modulate "off" and "on" states by chemical addition of dehydroluciferin and coenzyme A, respectively. We show that CdSe nanocrystals can shift the chemiluminescent emission to 760 nm enabling near-infrared (nIR) signaling. These results advance the viability of nanobionic plants as self-powered photonics, direct and indirect light sources.
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Affiliation(s)
- Seon-Yeong Kwak
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Juan Pablo Giraldo
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
- Department of Botany and Plant Sciences, University of California , 3401 Watkins Drive, Riverside, California United States
| | - Min Hao Wong
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Volodymyr B Koman
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Tedrick Thomas Salim Lew
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Jon Ell
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Mark C Weidman
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Rosalie M Sinclair
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Markita P Landry
- Department of Chemical and Biomolecular Engineering, University of California , 201 Gilman Hall, Berkeley, California United States
| | - William A Tisdale
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Aveue, Cambridge, Massachusetts United States
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27
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Rowe CL, Heyes A. Dietary Accumulation of Inorganic Selenium by a Larval Amphibian (Hyla chrysoscelis) and Influence on Accumulation of Background Mercury. Bull Environ Contam Toxicol 2017; 99:182-186. [PMID: 28409193 DOI: 10.1007/s00128-017-2087-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
Larval gray tree frogs (Hyla chrysoscelis) were exposed to inorganic Se (SeO2) added to the diet (10.2 and 86.3 ug/g dw) and monitored for accumulation and effect. Background concentrations of Hg were also measured in food and carcasses to assess possible effects of Se on Hg accumulation. Selenium was accumulated in a dose dependent manner, and life stages did not differ. No effects of Se exposure were observed on survival, growth, or time to metamorphosis. Mercury concentrations in carcasses, resulting from background concentrations in food, were significantly affected by the presence of Se. In the high Se treatment, Hg concentrations were significantly decreased relative to those in the low Se treatment and the control. Our study suggests that exposure to inorganic Se as SeO2 at the concentrations tested do not elicit adverse biological effects, but exposure to relatively high concentrations of Se may reduce accumulation of Hg from food.
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Affiliation(s)
- Christopher L Rowe
- University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, P. O. Box 38, Solomons, MD, 20688, USA.
| | - Andrew Heyes
- University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, P. O. Box 38, Solomons, MD, 20688, USA
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28
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Schiavon M, Ertani A, Parrasia S, Vecchia FD. Selenium accumulation and metabolism in algae. Aquat Toxicol 2017; 189:1-8. [PMID: 28554051 DOI: 10.1016/j.aquatox.2017.05.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/21/2017] [Accepted: 05/23/2017] [Indexed: 05/03/2023]
Abstract
Selenium (Se) is an intriguing element because it is metabolically required by a variety of organisms, but it may induce toxicity at high doses. Algae primarily absorb selenium in the form of selenate or selenite using mechanisms similar to those reported in plants. However, while Se is needed by several species of microalgae, the essentiality of this element for plants has not been established yet. The study of Se uptake and accumulation strategies in micro- and macro-algae is of pivotal importance, as they represent potential vectors for Se movement in aquatic environments and Se at high levels may affect their growth causing a reduction in primary production. Some microalgae exhibit the capacity of efficiently converting Se to less harmful volatile compounds as a strategy to cope with Se toxicity. Therefore, they play a crucial role in Se-cycling through the ecosystem. On the other side, micro- or macro-algae enriched in Se may be used in Se biofortification programs aimed to improve Se content in human diet via supplementation of valuable food. Indeed, some organic forms of selenium (selenomethionine and methylselenocysteine) are known to act as anticarcinogenic compounds and exert a broad spectrum of beneficial effects in humans and other mammals. Here, we want to give an overview of the developments in the current understanding of Se uptake, accumulation and metabolism in algae, discussing potential ecotoxicological implications and nutritional aspects.
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Affiliation(s)
- Michela Schiavon
- Biology Department, Colorado State University, Fort Collins, CO 80523-1878, USA.
| | - Andrea Ertani
- DAFNAE, University of Padova, Agripolis, 35020 Legnaro PD, Italy
| | - Sofia Parrasia
- Department of Pharmaceutical and Pharmacological Sciences (DSF), University of Padova, Padova, 35131, Italy
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29
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Jin X, Xu Z, Zhao X, Chen M, Xu S. The antagonistic effect of selenium on lead-induced apoptosis via mitochondrial dynamics pathway in the chicken kidney. Chemosphere 2017; 180:259-266. [PMID: 28411542 DOI: 10.1016/j.chemosphere.2017.03.130] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/23/2017] [Accepted: 03/29/2017] [Indexed: 06/07/2023]
Abstract
Selenium (Se) is known to have antagonistic effects against lead (Pb) toxicity in animal. The aim of this study was to evaluate the roles of mitochondrial dynamics on Pb-induced apoptosis in the chicken kidney and investigate the antagonistic effect of Se. In the present study, brown layer chickens were randomly allocated to four groups, and each group were exposed to a basic diet (0.2 mg kg-1 Se and 0.5 mg kg-1 Pb), a Se-adequate diet (1 mg kg-1 Se and 0.5 mg kg-1 Pb), a Se and Pb compound diet (1 mg kg-1 Se and 350 mg kg-1 Pb) or a Pb supplemented diet (0.2 mg kg-1 Se and 350 mg kg-1 Pb). On the 90th day, the kidney was removed to determine the activities of mitochondrial respiratory chain complexes, ATPases and oxidative indexes. The expression levels of mitochondrial dynamics and apoptosis-related genes were also determined. The results showed that Pb treatment significantly decreased the activities of mitochondrial complexes and ATPases, and increased oxidative stress, and mitochondrial dynamics and anti-apoptosis-related genes had a lower expression, whereas mitochondrial pro-apoptosis related genes presented higher expressions in the Pb group compared with control group (P < 0.05). However, the co-treatment of Se and Pb significantly alleviated those changes compared with the Pb group (P < 0.05). In conclusion, we speculated that Pb could increase the oxidative stress and promote the apoptosis via regulating mitochondrial dynamics and apoptosis-related genes, and Se exhibited antagonistic roles against the Pb-induced apoptosis in the kidney of chickens.
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Affiliation(s)
- Xi Jin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Zhe Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Xia Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Menghao Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
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30
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Abstract
The ability of some crops to accumulate selenium (Se) is crucial for human nutrition and health. Selenium has been identified as a cofactor of the enzyme glutathione peroxidase, which is a catalyzer in the reduction of peroxides that can damage cells and tissues, and can act as an antioxidant. Plants are the first link in the food chain, which ends with humans. Increasing the Se quantity in plant products, including leafy and fruity vegetables, and fruit crops, without exceeding the toxic threshold, is thus a good way to increase animal and human Se intake, with positive effects on long-term health. In many Se-enriched plants, most Se is in its major organic form. Given that this form is more available to humans and more efficient in increasing the selenium content than inorganic forms, the consumption of Se-enriched plants appears to be beneficial. An antioxidant effect of Se has been detected in Se-enriched vegetables and fruit crops due to an improved antioxidative status and to a reduced biosynthesis of ethylene, which is the hormone with a primary role in plant senescence and fruit ripening. This thus highlights the possible positive effect of Se in preserving a longer shelf-life and longer-lasting quality.
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Affiliation(s)
- Martina Puccinelli
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy.
| | - Fernando Malorgio
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy.
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31
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Zhang R, Shao M, Han X, Wang C, Li Y, Hu B, Pang D, Xie Z. ATP synthesis in the energy metabolism pathway: a new perspective for manipulating CdSe quantum dots biosynthesized in Saccharomyces cerevisiae. Int J Nanomedicine 2017; 12:3865-3879. [PMID: 28579774 PMCID: PMC5446969 DOI: 10.2147/ijn.s132719] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Due to a growing trend in their biomedical application, biosynthesized nanomaterials are of great interest to researchers nowadays with their biocompatible, low-energy consumption, economic, and tunable characteristics. It is important to understand the mechanism of biosynthesis in order to achieve more efficient applications. Since there are only rare studies on the influences of cellular energy levels on biosynthesis, the influence of energy is often overlooked. Through determination of the intracellular ATP concentrations during the biosynthesis process, significant changes were observed. In addition, ATP synthesis deficiency caused great decreases in quantum dots (QDs) biosynthesis in the Δatp1, Δatp2, Δatp14, and Δatp17 strains. With inductively coupled plasma-atomic emission spectrometry and atomic absorption spectroscopy analyses, it was found that ATP affected the accumulation of the seleno-precursor and helped with the uptake of Cd and the formation of QDs. We successfully enhanced the fluorescence intensity 1.5 or 2 times through genetic modification to increase ATP or SeAM (the seleno analog of S-adenosylmethionine, the product that would accumulate when ATP is accrued). This work explains the mechanism for the correlation of the cellular energy level and QDs biosynthesis in living cells, demonstrates control of the biosynthesis using this mechanism, and thus provides a new manipulation strategy for the biosynthesis of other nanomaterials to widen their applications.
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Affiliation(s)
- Rong Zhang
- Hubei Key Laboratory of Cell Homeostasis
- College of Life Sciences, Wuhan University
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
| | - Ming Shao
- Hubei Key Laboratory of Cell Homeostasis
- College of Life Sciences, Wuhan University
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
| | - Xu Han
- Hubei Key Laboratory of Cell Homeostasis
- College of Life Sciences, Wuhan University
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
| | - Chuan Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, People’s Republic of China
| | - Yong Li
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, People’s Republic of China
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, People’s Republic of China
| | - Daiwen Pang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, People’s Republic of China
| | - Zhixiong Xie
- Hubei Key Laboratory of Cell Homeostasis
- College of Life Sciences, Wuhan University
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
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32
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Hageman SPW, van der Weijden RD, Stams AJM, van Cappellen P, Buisman CJN. Microbial selenium sulfide reduction for selenium recovery from wastewater. J Hazard Mater 2017; 329:110-119. [PMID: 28131038 DOI: 10.1016/j.jhazmat.2016.12.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 12/28/2016] [Accepted: 12/30/2016] [Indexed: 06/06/2023]
Abstract
Microbial reduction of selenium sulfide (SeS2) is a key step in a new treatment process to recover selenium from selenate and selenite streams. In this process, selenate is first reduced to selenite, and subsequently selenite is reduced by sulfide and precipitates from the solution as SeS2. The latter is bio-reduced to elemental selenium and sulfide. Two anaerobic granular sludges (Eerbeek and Emmtec) were tested for their efficiency to reduce commercial crystalline SeS2. Emmtec sludge had the highest reducing capacity with commercial SeS2 and was therefore also used for the bioreduction of laboratory synthesized amorphous SeS2. Synthesized SeS2 was formed mixing a sulfide solution and effluent containing selenite. With both SeS2 solids (commercial and synthesized SeS2), Emmtec sludge produced sulfide and a solid consisting of hexagonal elemental selenium. The crystalline hexagonal structure suggests the absence of biomolecules, which stabilize amorphous selenium bio-particles under comparable process conditions (T=30°C and a pH between 6 and 7). Selenium particles were not attached to the biomass, suggesting an extracellular formation. The results support the feasibility of the bio-reduction process using sulfur for recovering selenium from water.
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Affiliation(s)
- S P W Hageman
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
| | - R D van der Weijden
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - A J M Stams
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
| | - P van Cappellen
- Department of Earth & Environmental Sciences, University of Waterloo, Waterloo, Canada
| | - C J N Buisman
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
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Kalisinska E, Lanocha-Arendarczyk N, Kosik-Bogacka D, Budis H, Pilarczyk B, Tomza-Marciniak A, Podlasinska J, Cieslik L, Popiolek M, Pirog A, Jedrzejewska E. Muscle mercury and selenium in fishes and semiaquatic mammals from a selenium-deficient area. Ecotoxicol Environ Saf 2017; 136:24-30. [PMID: 27810577 DOI: 10.1016/j.ecoenv.2016.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/13/2016] [Accepted: 10/23/2016] [Indexed: 05/13/2023]
Abstract
The aim of this study was to investigate and compare total mercury (Hg), selenium (Se), and Se:Hg molar ratios in fish muscles (phytophages n=3; benthophages n=32; predators n=5) and semiaquatic carnivores, including piscivores (the European otter n=8, the feral American mink n=7) and the omnivorous raccoon (n=37) from a riverine European ecosystem in a Se-deficient area. The Hg concentration in fish reached 0.337μg/g dry weight, dw (0.084μg/g wet weight, ww). We found significant differences among Hg levels in tested vertebrate groups (predators vs benthophages: 0.893 vs 0.281μg/g; piscivores vs omnivores: 6.085 vs 0.566μg/g dw). Fish groups did not differ in Se concentrations, with a mean value of 0.653μg/g dw. Significant differences were revealed between Se levels in piscivorous and omnivorous carnivores (0.360 vs 0.786μg/g dw, respectively). Fish Se:Hg molar ratio values were >2.2. Benthophages had higher the ratio than predators but similar to phytophages. Among carnivores, piscivores had much lower the ratio than raccoon (0.14 vs 3.75) but raccoon and fish medians did not significantly differ. We found almost two times higher Se levels in fish and raccoons compared to piscivores, possibly resulting from lower fish Se digestibility by piscivores in contrast to higher absorption of plant Se by many fish and omnivorous raccoons. Considering that a tissue Se:Hg molar ratio <1 may be connected with a Hg toxicity potential increase, we assume that piscivores in Se-deficient area are in worse situation and more exposed to Hg than fish and omnivores.
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Affiliation(s)
- Elzbieta Kalisinska
- Department of Biology and Medical Parasitology, Pomeranian Medical University, in Szczecin, Poland
| | | | - Danuta Kosik-Bogacka
- Department of Biology and Medical Parasitology, Pomeranian Medical University, in Szczecin, Poland.
| | - Halina Budis
- Department of Health Education, University of Szczecin, Poland
| | - Bogumila Pilarczyk
- Chair of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology in Szczecin, Poland
| | - Agnieszka Tomza-Marciniak
- Chair of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology in Szczecin, Poland
| | - Joanna Podlasinska
- Department of Environmental Management and Protection, Western Pomeranian University of Technology,in Szczecin, Poland
| | | | - Marcin Popiolek
- Department of Parasitology, Institute of Genetics and Microbiology, University of Wroclaw, Poland
| | - Agnieszka Pirog
- Department of Invertebrate Systematics and Ecology, Institute of Biology, Wroclaw University of Environmental and Life Sciences, Poland
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Rzymski P, Mleczek M, Niedzielski P, Siwulski M, Gąsecka M. Cultivation of Agaricus bisporus enriched with selenium, zinc and copper. J Sci Food Agric 2017; 97:923-928. [PMID: 27218432 DOI: 10.1002/jsfa.7816] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 04/13/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Agaricus bisporus (white button mushroom) is an important culinary and medicinal species of worldwide importance. The present study investigated for the first time whether it may be grown on substrates supplemented with Se alone or in combination with Cu and/or Zn (0.1-0.8 mmol L-1 ) to produce fruiting bodies of increased nutritional value. RESULTS As found, substrate supplementation did not affect yielded biomass up to 0.6 mmol L-1 element concentrations regardless of the cultivation model. At 0.8 mmol L-1 Se + Cu and Se + Zn supplementation biomass comparable with controls still developed. The accumulation of trace elements in the fruiting bodies generally increased over the concentration gradient reaching its maximum at 0.6 mmol L-1 (for Se + Zn and Se + Cu + Zn) and 0.8 mmol L-1 (for Se and Se + Cu). The organic Se constituted the greatest share in total Se quota. As calculated, each 10 g of dried fruiting bodies of A. bisporus obtained from 0.6 or 0.8 mmol L-1 supplementation would represent 342-469% of the Recommended Daily Allowance (RDA) for Se, 43.4-48.5% for Cu and 5.2-5.8% for Zn. CONCLUSION Considering inexpensive methods of A. bisporus cultivation, global popularity and use of this mushroom, its biofortification with Se, Cu and Zn could have a practical application in deficiency prevention and assisted treatment. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Piotr Rzymski
- Poznań University of Medical Sciences, Faculty of Health Sciences, Department of Environmental Medicine, Poznań, Poland
| | - Mirosław Mleczek
- Poznań University of Life Sciences, Department of Chemistry, Poznań, Poland
| | | | - Marek Siwulski
- Poznań University of Life Sciences, Department of Vegetable Crops, Poznań, Poland
| | - Monika Gąsecka
- Poznań University of Life Sciences, Department of Chemistry, Poznań, Poland
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Liu F, Huang JC, Zhou C, He S, Zhou W. Development of an algal treatment system for Se removal: Effects of light regimes, nutrients, sulfate and hypersalinity. Chemosphere 2016; 164:372-378. [PMID: 27596824 DOI: 10.1016/j.chemosphere.2016.08.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 08/01/2016] [Accepted: 08/27/2016] [Indexed: 06/06/2023]
Abstract
Selenium (Se) exposure poses potential risks to wildlife at the Salton Sea. Our previous research suggests Chlorella sp. be highly efficient at absorbing and volatilizing Se. In developing an algal treatment system for Se removal, this study further evaluated the performance under the conditions to be encountered in the field using Chlorella pyrenoidosa and Chlorella vulgaris. The results show the algal Se removal efficiency was little affected by photoperiod, yet volatilization became relatively greater in dark/light cycles over a longer term. The rates of Se absorption and volatilization by C. vulgaris were 88% and 77% more, respectively, in the DI water, while C. pyrenoidosa acted oppositely, indicating C. vulgaris will perform better in Se removal if nutrient levels are reduced in advance. The presence of sulfate reduced biomass Se, especially through volatilization, by 8% for C. vulgaris, lessening potential ecotoxicity. Finally, C. vulgaris released biomass Se back to the water column under hypersaline conditions, leading to a 6% increase in water Se concentrations. These results suggest C. vulgaris be the best alga for the treatment of Se laden river water in the Salton Sea area, yet a filtering system is required to prevent Se containing algae from entering food chains.
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Affiliation(s)
- Fang Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jung-Chen Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
| | - Chuanqi Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Shengbing He
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Weili Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
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36
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Xie L, Wu X, Chen H, Luo Y, Guo Z, Mu J, Blankson ER, Dong W, Klerks PL. The bioaccumulation and effects of selenium in the oligochaete Lumbriculus variegatus via dissolved and dietary exposure routes. Aquat Toxicol 2016; 178:1-7. [PMID: 27450235 DOI: 10.1016/j.aquatox.2016.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/13/2016] [Accepted: 07/15/2016] [Indexed: 06/06/2023]
Abstract
Aquatic organisms take up selenium from solution and from their diets. Many questions remain regarding the relative importance of selenium accumulation from these sources and resulting effects in benthic invertebrates. The present study addressed the toxicity and accumulation of Se via dissolved and dietary exposures to three different Se species, in the freshwater oligochaete Lumbriculus variegatus. Worms were exposed to 20μg/g dry weight of selenite (Se(IV)), selenate (Se(VI)), or seleno-l-methionine (Se-Met) in their diet (sediment) or to 15μg/L dissolved Se in water-only exposures. While the dissolved and sediment Se levels differed greatly, such levels may co-occur at a Se-contaminated site. Se accumulation, worm population growth, lipid peroxidation (as TBARS), and Na(+)/K(+)-ATPase activity were quantified at the end of the 2-week exposure. The sediment Se-Met exposure caused 100% mortality, while worm densities were reduced by the other exposures except the Se(VI) one. Se bioaccumulation was generally higher for the sediment-Se exposure than the dissolved-Se ones, and was higher for Se(IV) than Se(VI) in the dissolved-Se exposure but not the sediment-Se one. The Se accumulation was highest for Se-Met. The oligochaetes that accumulated Se had higher levels of lipid peroxidation and reduced Na(+)/K(+)-ATPase activity. The present study's findings of differences in Se accumulation and toxicity for the three Se species, with effects generally but not exclusively a function of Se body burdens, underscore the need for research on these issues in invertebrates. Moreover, the results imply that the dietary uptake route is the predominant one for Se accumulation in L. variegatus.
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Affiliation(s)
- Lingtian Xie
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Liaoning 110016, PR China.
| | - Xing Wu
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Liaoning 110016, PR China
| | - Hongxing Chen
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Liaoning 110016, PR China
| | - Yongju Luo
- Guangxi Academy of Fishery Science, Guangxi 530021, PR China.
| | - Zhongbao Guo
- Guangxi Academy of Fishery Science, Guangxi 530021, PR China
| | - Jingli Mu
- Division of Marine Chemistry, National Marine Environmental Monitoring Center, Dalian, Liaoning 116023, PR China
| | - Emmanuel R Blankson
- Department of Biology, University of Louisiana at Lafayette, P. O. Box 43602, Lafayette, LA 70504-3602, USA
| | - Wu Dong
- Inner Mongolia University for the Nationalities, Tongliao 028000, PR China
| | - Paul L Klerks
- Department of Biology, University of Louisiana at Lafayette, P. O. Box 43602, Lafayette, LA 70504-3602, USA
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37
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LeBlanc KL, Wallschläger D. Production and Release of Selenomethionine and Related Organic Selenium Species by Microorganisms in Natural and Industrial Waters. Environ Sci Technol 2016; 50:6164-6171. [PMID: 27228300 DOI: 10.1021/acs.est.5b05315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Laboratory algal cultures exposed to selenate were shown to produce and release selenomethionine, selenomethionine oxide, and several other organic selenium metabolites. Released discrete organic selenium species accounted for 1.6-13.1% of the selenium remaining in the media after culture death, with 1.3-6.1% of the added selenate recovered as organic metabolites. Analysis of water from an industrially impacted river collected immediately after the death of massive annual algal blooms showed that no selenomethionine or selenomethionine oxide was present. However, other discrete organic selenium species, including a cyclic oxidation product of selenomethionine, were observed, indicating the previous presence of selenomethionine. Industrial biological treatment systems designed for remediation of selenium-contaminated waters were shown to increase both the concentration of organic selenium species in the effluent, relative to influent water, and the fraction of organic selenium to up to 8.7% of the total selenium in the effluent, from less than 1.1% in the influent. Production and emission of selenomethionine, selenomethionine oxide, and other discrete organic selenium species were observed. These findings are discussed in the context of potentially increased selenium bioavailability caused by microbial activity in aquatic environments and biological treatment systems, despite overall reductions in total selenium concentration.
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Affiliation(s)
- Kelly L LeBlanc
- Environmental and Life Sciences Graduate Program, ‡Water Quality Centre, Environmental and Resource Science Program, and Department of Chemistry, Trent University , 1600 West Bank Drive, Peterborough, Ontario Canada K9J 7B8
| | - Dirk Wallschläger
- Environmental and Life Sciences Graduate Program, ‡Water Quality Centre, Environmental and Resource Science Program, and Department of Chemistry, Trent University , 1600 West Bank Drive, Peterborough, Ontario Canada K9J 7B8
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38
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Zarco-Fernández S, Coto-García AM, Muñoz-Olivas R, Sanz-Landaluze J, Rainieri S, Cámara C. Bioconcentration of ionic cadmium and cadmium selenide quantum dots in zebrafish larvae. Chemosphere 2016; 148:328-335. [PMID: 26820780 DOI: 10.1016/j.chemosphere.2015.12.077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/26/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
The concern related to the use of nanomaterials is growing nowadays, especially the risk associated with their emission or exposure. One type of nanomaterials that has attracted much attention is quantum dots (QDs). QDs incorporation in consumer goods increases the probability of their entering in the environment and then into living organisms and human. In order to evaluate their potential to be bioconcentrated, zebrafish larvae have been exposed to SeCd/ZnS QDs, after performing an exhaustive characterization of these nanoparticles under the assay conditions. These data were compared with those obtained when zebrafish larvae were exposed to ionic cadmium. Finally, distribution of ionic Cd and QDs in exposed zebrafish larvae have been evaluated by Laser Ablation ICP-MS.
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Affiliation(s)
- S Zarco-Fernández
- Dpto. Química Analítica, Facultad CC. Químicas, Universidad Complutense, Avda. Complutense S/N, 28040 Madrid, Spain
| | - A M Coto-García
- Dpto. Química Analítica, Facultad CC. Químicas, Universidad Complutense, Avda. Complutense S/N, 28040 Madrid, Spain
| | - R Muñoz-Olivas
- Dpto. Química Analítica, Facultad CC. Químicas, Universidad Complutense, Avda. Complutense S/N, 28040 Madrid, Spain.
| | - J Sanz-Landaluze
- Dpto. Química Analítica, Facultad CC. Químicas, Universidad Complutense, Avda. Complutense S/N, 28040 Madrid, Spain
| | - S Rainieri
- Food Research Division, AZTI-Tecnalia, 23 Parque Tecnológico de Bizkaia, Astondo Bidea 609, 24, 48160 Derio, Spain
| | - C Cámara
- Dpto. Química Analítica, Facultad CC. Químicas, Universidad Complutense, Avda. Complutense S/N, 28040 Madrid, Spain.
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Martynenko IV, Kuznetsova VA, Litvinov IK, Orlova AO, Maslov VG, Fedorov AV, Dubavik A, Purcell-Milton F, Gun'ko YK, Baranov AV. Enantioselective cellular uptake of chiral semiconductor nanocrystals. Nanotechnology 2016; 27:075102. [PMID: 26782947 DOI: 10.1088/0957-4484/27/7/075102] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The influence of the chirality of semiconductor nanocrystals, CdSe/ZnS quantum dots (QDs) capped with L- and D-cysteine, on the efficiency of their uptake by living Ehrlich Ascite carcinoma cells is studied by spectral- and time-resolved fluorescence microspectroscopy. We report an evident enantioselective process where cellular uptake of the L-Cys QDs is almost twice as effective as that of the D-Cys QDs. This finding paves the way for the creation of novel approaches to control the biological properties and behavior of nanomaterials in living cells.
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Affiliation(s)
- I V Martynenko
- ITMO University, 49 Kronverksky pr., St. Petersburg, 197101, Russia
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40
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Yan ZY, Ai XX, Su YL, Liu XY, Shan XH, Wu SM. Intracellular Biosynthesis of Fluorescent CdSe Quantum Dots in Bacillus subtilis: A Strategy to Construct Signaling Bacterial Probes for Visually Detecting Interaction Between Bacillus subtilis and Staphylococcus aureus. Microsc Microanal 2016; 22:13-21. [PMID: 26687198 DOI: 10.1017/s1431927615015548] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this work, fluorescent Bacillus subtilis (B. subtilis) cells were developed as probes for imaging applications and to explore behaviorial interaction between B. subtilis and Staphylococcus aureus (S. aureus). A novel biological strategy of coupling intracellular biochemical reactions for controllable biosynthesis of CdSe quantum dots by living B. subtilis cells was demonstrated, through which highly luminant and photostable fluorescent B. subtilis cells were achieved with good uniformity. With the help of the obtained fluorescent B. subtilis cells probes, S. aureus cells responded to co-cultured B. subtilis and to aggregate. The degree of aggregation was calculated and nonlinearly fitted to a polynomial model. Systematic investigations of their interactions implied that B. subtilis cells inhibit the growth of neighboring S. aureus cells, and this inhibition was affected by both the growth stage and the amount of surrounding B. subtilis cells. Compared to traditional methods of studying bacterial interaction between two species, such as solid culture medium colony observation and imaging mass spectrometry detection, the procedures were more simple, vivid, and photostable due to the efficient fluorescence intralabeling with less influence on the cells' surface, which might provide a new paradigm for future visualization of microbial behavior.
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Affiliation(s)
- Zheng-Yu Yan
- 1Department of Analytical Chemistry,China Pharmaceutical University,24 Tongjia Lane,Gulou District,Nanjing 210009,China
| | - Xiao-Xia Ai
- 1Department of Analytical Chemistry,China Pharmaceutical University,24 Tongjia Lane,Gulou District,Nanjing 210009,China
| | - Yi-Long Su
- 1Department of Analytical Chemistry,China Pharmaceutical University,24 Tongjia Lane,Gulou District,Nanjing 210009,China
| | - Xin-Ying Liu
- 1Department of Analytical Chemistry,China Pharmaceutical University,24 Tongjia Lane,Gulou District,Nanjing 210009,China
| | - Xiao-Hui Shan
- 3Laizhou Entry-Exit Inspection and Quarantine Bureau,Laizhou 261400,China
| | - Sheng-Mei Wu
- 1Department of Analytical Chemistry,China Pharmaceutical University,24 Tongjia Lane,Gulou District,Nanjing 210009,China
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41
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Spatzal T, Perez KA, Howard JB, Rees DC. Catalysis-dependent selenium incorporation and migration in the nitrogenase active site iron-molybdenum cofactor. eLife 2015; 4:e11620. [PMID: 26673079 PMCID: PMC4755756 DOI: 10.7554/elife.11620] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 12/15/2015] [Indexed: 12/05/2022] Open
Abstract
Dinitrogen reduction in the biological nitrogen cycle is catalyzed by nitrogenase, a two-component metalloenzyme. Understanding of the transformation of the inert resting state of the active site FeMo-cofactor into an activated state capable of reducing dinitrogen remains elusive. Here we report the catalysis dependent, site-selective incorporation of selenium into the FeMo-cofactor from selenocyanate as a newly identified substrate and inhibitor. The 1.60 Å resolution structure reveals selenium occupying the S2B site of FeMo-cofactor in the Azotobacter vinelandii MoFe-protein, a position that was recently identified as the CO-binding site. The Se2B-labeled enzyme retains substrate reduction activity and marks the starting point for a crystallographic pulse-chase experiment of the active site during turnover. Through a series of crystal structures obtained at resolutions of 1.32-1.66 Å, including the CO-inhibited form of Av1-Se2B, the exchangeability of all three belt-sulfur sites is demonstrated, providing direct insights into unforeseen rearrangements of the metal center during catalysis.
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Affiliation(s)
- Thomas Spatzal
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, United States
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, United States
| | - Kathryn A Perez
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, United States
| | - James B Howard
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, United States
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, United States
| | - Douglas C Rees
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, United States
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, United States
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42
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Storkey C, Pattison DI, Ignasiak MT, Schiesser CH, Davies MJ. Kinetics of reaction of peroxynitrite with selenium- and sulfur-containing compounds: Absolute rate constants and assessment of biological significance. Free Radic Biol Med 2015; 89:1049-56. [PMID: 26524402 DOI: 10.1016/j.freeradbiomed.2015.10.424] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 10/26/2015] [Accepted: 10/28/2015] [Indexed: 12/22/2022]
Abstract
Peroxynitrite (the physiological mixture of ONOOH and its anion, ONOO(-)) is a powerful biologically-relevant oxidant capable of oxidizing and damaging a range of important targets including sulfides, thiols, lipids, proteins, carbohydrates and nucleic acids. Excessive production of peroxynitrite is associated with several human pathologies including cardiovascular disease, ischemic-reperfusion injury, circulatory shock, inflammation and neurodegeneration. This study demonstrates that low-molecular-mass selenols (RSeH), selenides (RSeR') and to a lesser extent diselenides (RSeSeR') react with peroxynitrite with high rate constants. Low molecular mass selenols react particularly rapidly with peroxynitrite, with second order rate constants k2 in the range 5.1 × 10(5)-1.9 × 10(6)M(-1)s(-1), and 250-830 fold faster than the corresponding thiols (RSH) and many other endogenous biological targets. Reactions of peroxynitrite with selenides, including selenosugars are approximately 15-fold faster than their sulfur homologs with k2 approximately 2.5 × 10(3)M(-1)s(-1). The rate constants for diselenides and sulfides were slower with k2 0.72-1.3 × 10(3)M(-1)s(-1) and approximately 2.1 × 10(2)M(-1)s(-1) respectively. These studies demonstrate that both endogenous and exogenous selenium-containing compounds may modulate peroxynitrite-mediated damage at sites of acute and chronic inflammation, with this being of particular relevance at extracellular sites where the thiol pool is limited.
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Affiliation(s)
- Corin Storkey
- The Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | - David I Pattison
- The Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | - Marta T Ignasiak
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Belgdamsvej 3, Copenhagen 2200, Denmark
| | - Carl H Schiesser
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Michael J Davies
- The Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Belgdamsvej 3, Copenhagen 2200, Denmark.
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Abstract
The negative efficacy outcomes of double-blinded, randomized, placebo-controlled Phase III human clinical trials with selenomethionine (SeMet) and SeMet-rich selenized-yeast (Se-yeast) for prostate cancer prevention and Se-yeast for prevention of nonsmall cell lung cancer (NSCLC) in North America lead to rejection of SeMet/Se-yeast for cancer prevention in Se-adequate populations. We identify 2 major lessons from the outcomes of these trials: 1) the antioxidant hypothesis was tested in wrong subjects or patient populations, and 2) the selection of Se agents was not supported by cell culture and preclinical animal efficacy data as is common in drug development. We propose that next-generation forms of Se (next-gen Se), such as methylselenol precursors, offer biologically appropriate approaches for cancer chemoprevention but these are faced with formidable challenges. Solid mechanism-based preclinical efficacy assessments and comprehensive safety studies with next-gen Se will be essential to revitalize the idea of cancer chemoprevention with Se in the post-SELECT era. We advocate smaller mechanism-driven Phase I/II trials with these next-gen Se to guide and justify future decisions for definitive Phase III chemoprevention efficacy trials.
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Affiliation(s)
- Junxuan Lü
- Department of Biomedical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center. 1300 S. Coulter St, Amarillo, TX79106 (JL, JZ, CJ)
| | - Jinhui Zhang
- Department of Biomedical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center. 1300 S. Coulter St, Amarillo, TX79106 (JL, JZ, CJ)
| | - Cheng Jiang
- Department of Biomedical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center. 1300 S. Coulter St, Amarillo, TX79106 (JL, JZ, CJ)
| | - Yibin Deng
- Hormel Institute, University of Minnesota, Austin, MN 55912 (YD)
| | - Nur Özten
- Department of Pathology, University of Illinois at Chicago (UIC), College of Medicine, Chicago, IL (NO, MCB)
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Bezmiâlem Vakif University, Istanbul, Turkey (NO)
| | - Maarten C. Bosland
- Department of Pathology, University of Illinois at Chicago (UIC), College of Medicine, Chicago, IL (NO, MCB)
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Lyubenova L, Sabodash X, Schröder P, Michalke B. Selenium species in the roots and shoots of chickpea plants treated with different concentrations of sodium selenite. Environ Sci Pollut Res Int 2015; 22:16978-16986. [PMID: 26122563 DOI: 10.1007/s11356-015-4755-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/18/2015] [Indexed: 06/04/2023]
Abstract
The trace element selenium has an essential role for human health. It is involved in redox center functions, and it is related to the immune system response. Legumes are among the main suppliers of selenium into the human food chain. Not only Se concentration as such but also more the chemical species of Se is of higher importance for successful Se supply to the human diet and its bioavailability. The current study was focused on the investigation of the Se species present in chickpea plants exposed to 0, 10, 25, 50, and 100 μM selenite in short- and long-term treatment studies. The linear increase of total Se concentration could be linked to the increased concentrations of Se exposure. The selenium species (SeMet, SeCys, selenite, selenate, GPx) detected in varying concentrations in shoots and roots depend on the exposure's concentration and duration. The investigation showed that chickpea can accumulate Se in favorable concentrations and its transformation to bioavailable Se species may have positive impacts on human health and aid to implement Se into the diet.
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Affiliation(s)
- Lyudmila Lyubenova
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.
| | - Xenia Sabodash
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Peter Schröder
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Bernhard Michalke
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
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45
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Abstract
Toxicity of quantum dots (QDs) has been a hot research concern in the past decade, and there is a lot of challenge in this field. The physicochemical characteristics of QDs can affect their toxicity, while little is known about the specific chemical form of QDs in living cells after incubation so far. In this work, speciation of four CdSe/ZnS QDs in HepG2 cells was carried out from the metallomics' point of view for the first time by using size exclusion chromatography (SEC) coupled with inductively coupled plasma-mass spectrometry (ICP-MS). On the basis of the signal of Cd, two kinds of chemical forms, named as QD-1 and QD-2, were observed in HepG2 cells incubated with CdSe/ZnS QDs. QD-1 was demonstrated to be a kind of QD-like nanoparticles, confirmed by chromatographic retention time, transmission electron microscopy (TEM) characterization, and fluorescence detection. QD-2 was demonstrated to be cadmium-metallothioneins complex (Cd-MTs) by reversed phase liquid chromatography (RPLC) synchronously coupled with ICP-MS and electrospray ionization quadrupole time-of-flight mass spectrometry (ESI-Q-TOF-MS) analysis. Meanwhile, speciation of QDs in HepG2 cells incubated with different conditions was analyzed. With the variation of QDs incubation concentration/time, and elimination time, the species of QD-1 and QD-2 were also observed without other obvious species, and both the amount of QD-1 and QD-2 increased with incubation concentration and time. The obtained results provide valuable information and a strategy for the study of existing chemical form of QDs, greatly benefiting the understanding of QDs toxicity in living cells.
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Affiliation(s)
- Lu Peng
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University , Wuhan 430072, PR China
| | - Man He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University , Wuhan 430072, PR China
| | - Beibei Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University , Wuhan 430072, PR China
| | - Yu Qiao
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University , Wuhan 430072, PR China
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University , Wuhan 430072, PR China
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46
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Kim JH, Kang JC. Oxidative stress, neurotoxicity, and non-specific immune responses in juvenile red sea bream, Pagrus major, exposed to different waterborne selenium concentrations. Chemosphere 2015; 135:46-52. [PMID: 25898389 DOI: 10.1016/j.chemosphere.2015.03.062] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 03/24/2015] [Accepted: 03/26/2015] [Indexed: 06/04/2023]
Abstract
Juvenile Pagrus major (mean length 15.8±1.6 cm, and mean weight 90.4±4.7 g) were exposed for 4 weeks with waterborne selenium concentration (0, 50, 100, 200, and 400 μg L(-1)). In oxidative stress indicators, liver and gill superoxide dismutase (SOD) activity and glutathione S-transferase (GST) activity were markedly elevated after 4 weeks exposure. Similarly, glutathione (GSH) level in liver and gill was also increased in response to the highest Se exposure after 4 weeks exposure. In neurotoxicity, AChE activity was inhibited in brain and muscle tissues by waterborne Se exposure. In the non-specific immune responses, lysozyme activity of plasma and kidney was significantly increased by waterborne Se exposure. Peroxidase activity and anti-protease activity were decreased at high Se concentration. The results suggest that waterborne Se exposure can induce significant oxidative stress, inhibition of AChE activity, and immunological alterations.
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Affiliation(s)
- Jun-Hwan Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, Republic of Korea
| | - Ju-Chan Kang
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, Republic of Korea.
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47
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Schilling K, Johnson TM, Dhillon KS, Mason PRD. Fate of Selenium in Soils at a Seleniferous Site Recorded by High Precision Se Isotope Measurements. Environ Sci Technol 2015; 49:9690-9698. [PMID: 26177307 DOI: 10.1021/acs.est.5b00477] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Selenium poisoning is a significant health problem in parts of Punjab, India, which is an area of intense agricultural productivity. To determine the complex soil dynamics that control distribution of Se in this area, we measured concentrations and δ(82/76)Se of bulk Se and individual Se pools in four soil profiles. This was compared against δ(82/76)Se of crops and groundwater used for irrigation. The isotopic composition of bulk Se and component Se pools reveal spatial heterogeneity. The bulk δ(82/76)Se show progressively lower values with increasing soil depth indicating the preferential migration of isotopically lighter Se downward through the soil profile. The δ(82/76)Se of water-soluble Se is isotopically heavier than δ(82/76)Se of adsorbed Se, suggesting Se isotope fractionation by reduction prior to scavenging by reactive minerals in the soil. The organically bound Se is isotopically lighter than water-soluble Se and correlates with the C/N ratio at different soil depths. Thus, Se immobilization by redox cycling controls the biogeochemical Se cycle in the soil. Se isotope ratios help to trace biochemical processes of Se in agricultural seleniferous soils and provide an important assessment for better soil management mitigating Se concentrations of ecotoxicological levels.
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Affiliation(s)
- Kathrin Schilling
- †Department of Environmental Science, Policy and Management, University of California, Berkeley, 130 Mulford Hall, Berkeley, California 94720, United States
| | - Thomas M Johnson
- ‡Department of Geology, University of Illinois at Urbana-Champaign, 152 Computer Applications Building, 605 E. Springfield Avenue, Champaign, Illinois 61820, United States
| | - Karaj S Dhillon
- §Department of Soil Science, Punjab Agricultural University, Ludhiana, Punjab 141 004, India
| | - Paul R D Mason
- ⊥Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands
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48
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Lavu RVS, Van De Wiele T, Pratti VL, Tack F, Du Laing G. Selenium bioaccessibility in stomach, small intestine and colon: Comparison between pure Se compounds, Se-enriched food crops and food supplements. Food Chem 2015; 197:382-7. [PMID: 26616964 DOI: 10.1016/j.foodchem.2015.08.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 09/30/2014] [Accepted: 08/02/2015] [Indexed: 01/13/2023]
Abstract
Selenium (Se) is an essential nutrient for humans as it plays an important role in glutathione peroxidase (GPx) activity. Moreover, it may reduce cancer risks. The objective of this work was to examine in vitro the bioaccessibility of Se in three different Se-enriched food supplements and two different Se-enriched food crops, with reference to two pure Se standards, and changes in its speciation during intestinal digestion. Selenate was found to be stable throughout the entire digestion, whereas incubation of selenomethionine resulted in the chemical and microbial production of minor metabolites. The bioaccessibility of Se in Se-enriched food supplements and food crops was found to be highest in the small intestine. Compared to SelenoPrecise and Se-ACE tablets, a yoghurt-based supplement exhibited a much lower Se bioaccessibility, possibly due to the presence of nano- or microparticles of elemental Se. Colon microbiota were found to primarily affect Se bioaccessibility in the colon environment, with the presence of inactivated microbiota resulting in a higher bioaccessibility. A higher potential of Se to reach the colon and become accessible in this phase may result in beneficial effects on the colon health.
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Affiliation(s)
- Rama V Srikanth Lavu
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium.
| | - Tom Van De Wiele
- Laboratory of Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
| | - Varalakshmi L Pratti
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium; Laboratory of Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
| | - Filip Tack
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
| | - Gijs Du Laing
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
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49
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Tang Y, Werth CJ, Sanford RA, Singh R, Michelson K, Nobu M, Liu WT, Valocchi AJ. Immobilization of selenite via two parallel pathways during in situ bioremediation. Environ Sci Technol 2015; 49:4543-4550. [PMID: 25734534 DOI: 10.1021/es506107r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
It is widely understood that selenite can be biologically reduced to elemental selenium. Limited studies have shown that selenite can also be immobilized through abiotic precipitation with sulfide, a product of biological sulfate reduction. We demonstrate that both pathways significantly contribute to selenite immobilization in a microfluidic flow cell having a transverse mixing zone between propionate and selenite that mimics the reaction zone along the margins of a selenite plume undergoing bioremediation in the presence of background sulfate. The experiment showed that red particles of amorphous elemental selenium precipitate on the selenite-rich side of the mixing zone, while long crystals of selenium sulfides precipitate on the propionate-rich side of the mixing zone. We developed a continuum-scale reactive transport model that includes both pathways. The simulated results are consistent with the experimental results, and indicate that spatial segregation of the two selenium precipitates is due to the segregation of the more thermodynamic favorable selenite reduction and the less thermodynamically favorable sulfate reduction. The improved understanding of selenite immobilization and the improved model can help to better design in situ bioremediation processes for groundwater contaminated by selenite or other contaminants (e.g., uranium(IV)) that can be immobilized via similar pathways.
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Affiliation(s)
- Youneng Tang
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
- ∥Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - Charles J Werth
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
- ‡Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, 301 East Dean Keeton Street, Austin, Texas 78712, United States
| | - Robert A Sanford
- §Department of Geology, University of Illinois at Urbana-Champaign, 1301 West Green Street, Urbana, Illinois 61801, United States
| | - Rajveer Singh
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
| | - Kyle Michelson
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
| | - Masaru Nobu
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
| | - Wen-Tso Liu
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
| | - Albert J Valocchi
- †Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801, United States
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50
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Kaur G, Tripathi SK. Investigation of trypsin-CdSe quantum dot interactions via spectroscopic methods and effects on enzymatic activity. Spectrochim Acta A Mol Biomol Spectrosc 2015; 134:173-183. [PMID: 25011044 DOI: 10.1016/j.saa.2014.05.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 04/21/2014] [Accepted: 05/16/2014] [Indexed: 06/03/2023]
Abstract
The paper presents the interactions between trypsin and water soluble cadmium selenide (CdSe) quantum dots investigated by spectrophotometric methods. CdSe quantum dots have strong ability to quench the intrinsic fluorescence of trypsin by a static quenching mechanism. The quenching has been studied at three different temperatures where the results revealed that electrostatic interactions exist between CdSe quantum dots and trypsin and are responsible to stabilize the complex. The Scatchard plot from quenching revealed 1 binding site for quantum dots by trypsin, the same has been confirmed by making isothermal titrations of quantum dots against trypsin. The distance between donor and acceptor for trypsin-CdSe quantum dot complexes is calculated to be 2.8 nm by energy transfer mechanisms. The intrinsic fluorescence of CdSe quantum dots has also been enhanced by the trypsin, and is linear for concentration of trypsin ranging 1-80 μl. All the observations evidence the formation of trypsin-CdSe quantum dot conjugates, where trypsin retains the enzymatic activity which in turn is temperature and pH dependent.
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Affiliation(s)
- Gurvir Kaur
- Centre of Advanced Study in Physics, Department of Physics, Panjab University, Chandigarh 160014, India
| | - S K Tripathi
- Centre of Advanced Study in Physics, Department of Physics, Panjab University, Chandigarh 160014, India.
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