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Nag S, Kar S, Mishra S, Stany B, Seelan A, Mohanto S, Haryini S S, Kamaraj C, Subramaniyan V. Unveiling Green Synthesis and Biomedical Theranostic paradigms of Selenium Nanoparticles (SeNPs) - A state-of-the-art comprehensive update. Int J Pharm 2024; 662:124535. [PMID: 39094922 DOI: 10.1016/j.ijpharm.2024.124535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 07/15/2024] [Accepted: 07/26/2024] [Indexed: 08/04/2024]
Abstract
The advancements in nanotechnology, pharmaceutical sciences, and healthcare are propelling the field of theranostics, which combines therapy and diagnostics, to new heights; emphasizing the emergence of selenium nanoparticles (SeNPs) as versatile theranostic agents. This comprehensive update offers a holistic perspective on recent developments in the synthesis and theranostic applications of SeNPs, underscoring their growing importance in nanotechnology and healthcare. SeNPs have shown significant potential in multiple domains, including antioxidant, anti-inflammatory, anticancer, antimicrobial, antidiabetic, wound healing, and cytoprotective therapies. The review highlights the adaptability and biocompatibility of SeNPs, which are crucial for advanced disease detection, monitoring, and personalized treatment. Special emphasis is placed on advancements in green synthesis techniques, underscoring their eco-friendly and cost-effective benefits in biosensing, diagnostics, imaging and therapeutic applications. Additionally, the appraisal scrutinizes the progressive trends in smart stimuli-responsive SeNPs, conferring their role in innovative solutions for disease management and diagnostics. Despite their promising therapeutic and prophylactic potential, SeNPs also present several challenges, particularly regarding toxicity concerns. These challenges and their implications for clinical translation are thoroughly explored, providing a balanced view of the current state and prospects of SeNPs in theranostic applications.
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Affiliation(s)
- Sagnik Nag
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia.
| | - Shinjini Kar
- Department of Life Science and Biotechnology, Jadavpur University (JU), 188 Raja S.C. Mallick Road, Kolkata 700032, India; Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Shatakshi Mishra
- Department of Bio-Sciences, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India; Department of Applied Microbiology, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - B Stany
- Department of Bio-Sciences, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India; Department of Applied Microbiology, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Anmol Seelan
- Department of Biological Sciences, Sunandan Divatia School of Science, Narsee Monjee Institute of Management Studies (NMIMS), Pherozeshah Mehta Rd., Mumbai 400056, India
| | - Sourav Mohanto
- Department of Pharmaceutics, Yenepoya Pharmacy College & Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Sree Haryini S
- Department of Bio-Sciences, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India; Department of Applied Microbiology, School of Bio-Sciences & Technology (SBST), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Chinnaperumal Kamaraj
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology (SRMIST), Chennai, India; Interdisciplinary Institute of Indian System of Medicine, Directorate of Research, SRM Institute of Science and Technology, Chennai, India.
| | - Vetriselvan Subramaniyan
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Bandar Sunway, 47500 Selangor, Darul Ehsan, Malaysia
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Ding X, Zang M, Zhang Y, Chen Y, Du J, Yan A, Gu J, Li Y, Wei S, Xu J, Sun H, Liu J, Yu S. A Bioresponsive Diselenide-functionalized Hydrogel with Cascade Catalytic Activities for Enhanced Local Starvation- and Hypoxia-Activated Melanoma Therapy. Acta Biomater 2023:S1742-7061(23)00342-2. [PMID: 37339693 DOI: 10.1016/j.actbio.2023.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/25/2023] [Accepted: 06/14/2023] [Indexed: 06/22/2023]
Abstract
Glutathione (GSH) consumption-enhanced cancer therapies represent important potential cancer treatment strategies. Herein, we developed a new multifunctional diselenide-crosslinked hydrogel with glutathione peroxidase (GPx)-like catalytic activity for GSH depletion-enhanced glucose oxidase (GOx)-mediated tumor starvation and hypoxia-activated chemotherapy. By increasing acid and H2O2 during GOx-induced tumor starvation, the degradation of the multiresponsive scaffold could be promoted, which led to accelerated release of the loaded drugs. Meanwhile, the overproduced H2O2 led to accelerated intracellular GSH consumption under the cascade catalysis of small molecular selenides released from the degraded hydrogel, further enhancing the curative effect of in situ H2O2 and subsequent multimodal cancer treatment. Following the GOx-induced amplification of hypoxia, tirapazamine (TPZ) was transformed into the highly toxic benzotriazinyl radical (BTZ·), exhibiting enhanced antitumor activity. This GSH depletion-augmented cancer treatment strategy effectively boosted GOx-mediated tumor starvation and activated the hypoxia drug, leading to significantly enhanced local anticancer efficacy. STATEMENT OF SIGNIFICANCE: There has been a growing interest in depleting intracellular GSH as a potential strategy for improving ROS-based cancer therapy. Herein, a bioresponsive diselenide-functionalized dextran-based hydrogel with GPx-like catalytic activity was developed for GSH consumption-enhanced local starvation- and hypoxia-activated melanoma therapy. Results showed that the overproduced H2O2 led to accelerated intracellular GSH consumption under the cascade catalysis of small molecular selenides released from the degraded hydrogel, further enhancing the curative effect of in situ H2O2 and subsequent multimodal cancer treatment.
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Affiliation(s)
- Xiaoran Ding
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Mingsong Zang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China; College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P.R. China
| | - Yujie Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Yongchen Chen
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Jingjing Du
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - An Yan
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Jiamei Gu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Yuqi Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Shu Wei
- Jing Hengyi School of Education, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Jiayun Xu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Hongcheng Sun
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China
| | - Junqiu Liu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China.
| | - Shuangjiang Yu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Zhejiang Province, Hangzhou, 311121, Zhejiang, P.R. China.
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3
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Culhuac EB, Elghandour MMMY, Adegbeye MJ, Barbabosa-Pliego A, Salem AZM. Influence of Dietary Selenium on the Oxidative Stress in Horses. Biol Trace Elem Res 2023; 201:1695-1703. [PMID: 35526205 DOI: 10.1007/s12011-022-03270-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/27/2022] [Indexed: 11/02/2022]
Abstract
The objective of this review was to analyze the effect of dietary selenium on oxidative stress in horses by considering past and recent bibliographic sources. Some research was done on oxidative stress, related pathologies and how selenium regulates oxidative stress. Oxidizing molecules are molecules that can accept electrons from the substances with which they react. Oxidizing These molecules, of oxidizing, are found naturally in any organism, and there are antioxidant mechanisms that regulate its activity. However, when the body is stressed, oxidizing molecules outperform the antioxidants, causing an imbalance known as oxidative stress. Among antioxidant molecules, selenium can act as an important antioxidant in the body. The antioxidant activity is based on an enzyme called glutathione peroxidase, which depends on selenium and controls the activity of oxidizing molecules.
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Affiliation(s)
- Erick Bahena Culhuac
- Facultad de Ciencias, Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Mona M M Y Elghandour
- Facultad de Medicina Veterinaria Y Zootecnia, Universidad Autónoma del Estado de México, Toluca, Estado de México, México.
| | - Moyosore J Adegbeye
- Department of Animal Production and Health, Federal University of Technology, Akure, P.M.B. 704, Nigeria
| | - Alberto Barbabosa-Pliego
- Facultad de Medicina Veterinaria Y Zootecnia, Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Abdelfattah Z M Salem
- Facultad de Medicina Veterinaria Y Zootecnia, Universidad Autónoma del Estado de México, Toluca, Estado de México, México
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4
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Takata N, Myburgh J, Botha A, Nomngongo PN. The importance and status of the micronutrient selenium in South Africa: a review. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:3703-3723. [PMID: 34708333 DOI: 10.1007/s10653-021-01126-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 10/09/2021] [Indexed: 06/13/2023]
Abstract
Selenium (Se) is a vital micronutrient with widespread biological action but leads to toxicity when taken in excessive amounts. The biological benefits of Se are mainly derived from its presence in active sites of selenoproteins such as glutathione peroxidase (GPx). An enzyme whose role is to protect tissues against oxidative stress by catalysing the reduction of peroxidase responsible for various forms of cellular damage. The benefits of Se can be harvested when proper regulations of its intake are used. In South Africa, Se distribution in people's diets and animals are low with socio-economic factors and heterogeneous spread of Se in soil throughout the country playing a significant role. The possible causes of low Se in soils may be influenced by underlying geological material, climatic conditions, and anthropogenic activities. Sedimentary rock formations show higher Se concentrations compared to igneous and metamorphic rock formations. Higher Se concentrations in soils dominates in humid and sub-humid areas of South Africa. Furthermore, atmospheric acid deposition dramatically influences the availability of Se to plants. The studies reviewed in this article have shown that atomic absorption spectroscopy (AAS) is the most utilised analytical technique for total Se concentration determination in environmental samples and there is a lack of speciation data for Se concentrations. Shortcomings in Se studies have been identified, and the future research directions of Se in South Africa have been discussed.
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Affiliation(s)
- Nwabisa Takata
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, 2028, South Africa
- National Metrology Institute of South Africa, CSIR Campus, Building 5, Meiring Naude Road, Brummeria, Pretoria, 0182, South Africa
| | - Jan Myburgh
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Angelique Botha
- National Metrology Institute of South Africa, CSIR Campus, Building 5, Meiring Naude Road, Brummeria, Pretoria, 0182, South Africa
| | - Philiswa Nosizo Nomngongo
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, 2028, South Africa.
- Department of Science and Innovation (DSI)/National Research Foundation (NRF) South African Research Chair (SARChI): Nanotechnology for Water, University of Johannesburg, Doornfontein, 2028, South Africa.
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5
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Peng H, Shi S, Lu Z, Liu L, Peng S, Wei P, Yi T. HOCl-Activated Reactive Organic Selenium Delivery Platform for Alleviation of Inflammation. Bioconjug Chem 2022; 33:1602-1608. [PMID: 36018225 DOI: 10.1021/acs.bioconjchem.2c00349] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Selenium plays an important role in the biological system and can be used to treat various types of diseases. However, the current selenium delivery systems face the problems of low activity of released Se-containing compounds or nonspecific toxicity of reactive organic selenium donors in living systems. In response to these problems, we constructed a reactive organic selenium delivery platform by the activation of HOCl. Compared with prodrugs without activation capability, the hypochloroselenoite derivatives released from the present platform after activation displayed higher reactivity and could react with various nucleophiles to participate in specific life processes. Taking the selected compound (DHU-Se1) as an example, we found that it could alleviate the process of inflammation by blocking the polarization of macrophages from M0 to M1. Therefore, the development of this system is of great significance for expanding the application of selenium-containing compounds and treating related diseases.
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Affiliation(s)
- Hongying Peng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Shi Shi
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Zhenni Lu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Lingyan Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Shuxin Peng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Peng Wei
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Tao Yi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
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6
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Flohé L, Toppo S, Orian L. The glutathione peroxidase family: Discoveries and mechanism. Free Radic Biol Med 2022; 187:113-122. [PMID: 35580774 DOI: 10.1016/j.freeradbiomed.2022.05.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/18/2022] [Accepted: 05/04/2022] [Indexed: 12/15/2022]
Abstract
The discoveries leading to our present understanding of the glutathione peroxidases (GPxs) are recalled. The cytosolic GPx, now GPx1, was first described by Mills in 1957 and claimed to depend on selenium by Rotruck et al., in 1972. With the determination of a stoichiometry of one selenium per subunit, GPx1 was established as the first selenoenzyme of vertebrates. In the meantime, the GPxs have grown up to a huge family of enzymes that prevent free radical formation from hydroperoxides and, thus, are antioxidant enzymes, but they are also involved in regulatory processes or synthetic functions. The kinetic mechanism of the selenium-containing GPxs is unusual in neither showing a defined KM nor any substrate saturation. More recently, the reaction mechanism has been investigated by the density functional theory and nuclear magnetic resonance of model compounds mimicking the reaction cycle. The resulting concept sees a selenolate oxidized to a selenenic acid. This very fast reaction results from a concerted dual attack on the hydroperoxide bond, a nucleophilic one by the selenolate and an electrophilic one by a proton that is unstably bound in the reaction center. Postulated intermediates have been identified either in the native enzymes or in model compounds.
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Affiliation(s)
- Leopold Flohé
- Department of Molecular Medicine, University of Padova, Italy; Departamento de Bioquímica, Universidad de la República, Montevideo, Uruguay.
| | - Stefano Toppo
- Department of Molecular Medicine, University of Padova, Italy
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, Italy
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Karpov VV, Puzyk AM, Tolstoy PM, Tupikina EY. Hydration of selenolate moiety: Ab initio investigation of properties of O-H⋯Se(-) hydrogen bonds in CH 3 Se(-)⋯(H 2 O) n clusters. J Comput Chem 2021; 42:2014-2023. [PMID: 34415084 DOI: 10.1002/jcc.26733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/13/2021] [Accepted: 07/28/2021] [Indexed: 11/07/2022]
Abstract
This work is devoted to investigations of the influence of O-H···Se(-) hydrogen bonds on the electronic shells of selenolate R-Se(-) fragment (R═CH3 ). The geometric, energetic and nuclear magnetic resonance (NMR) spectral parameters for various conformers of CH3 Se(-)⋯(H2 O)n clusters with n = 0-6 were calculated at CCSD/aug-cc-pVDZ level of theory. For selenolate anion CH3 Se(-) solvation free energy was calculated, and for water media it is equal to -71.41 kcal/mol. For O-H···Se(-) hydrogen bonds the proportionality coefficients between QTAIM parameters at (3; -1) bond critical point and the strength of an individual hydrogen bond ∆E were proposed. It was shown, that despite a relative weakness of O-H···Se(-) hydrogen bonds, the outer electronic shell of the selenium atom changes significantly upon formation of each hydrogen bond. This, in turn, cause the dramatic change of NMR parameters of selenium nuclei.
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Affiliation(s)
- Valerii V Karpov
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Aleksandra M Puzyk
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Peter M Tolstoy
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Elena Yu Tupikina
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
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8
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Tupikina EY, Karpov VV, Tolstoy PM. On the influence of water molecules on the outer electronic shells of R-SeH, R-Se(-) and R-SeOH fragments in the selenocysteine amino acid residue. Phys Chem Chem Phys 2021; 23:13965-13970. [PMID: 34143160 DOI: 10.1039/d1cp01345a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this computational work (MP2/aug-cc-pVTZ) we investigated the features of the outer electronic shells of R-SeH, R-Se(-) and R-SeOH fragments (R = CH3), which can be considered as simplified models for the forms of the active centres of glutathione peroxidases GPx along their catalytic pathway (reduction of peroxides). It is shown that the preferential direction of a nucleophilic attack on the R-Se(-) fragment by a peroxide molecule is determined by the presence of the electron-depleted region of the selenium atom in front of the C-Se bond and nucleophilic attack can be facilitated by the solvation of R-Se(-) by water molecules. Such solvation does not block the direction of potential nucleophilic attack and also leads to the increase of the maximal value of the molecular electrostatic potential on the selenium atom. It was shown that the 77Se NMR chemical shift is sensitive both to the oxidation state and the hydration state of the selenium-containing fragment.
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Affiliation(s)
- Elena Yu Tupikina
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Emb. 7/9, Saint Petersburg, 199034, Russia.
| | - Valerii V Karpov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Emb. 7/9, Saint Petersburg, 199034, Russia.
| | - Peter M Tolstoy
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Emb. 7/9, Saint Petersburg, 199034, Russia.
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Mechanistic Insight into SARS-CoV-2 Mpro Inhibition by Organoselenides: The Ebselen Case Study. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11146291] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The main protease (Mpro) of SARS-CoV-2 is a current target for the inhibition of viral replication. Through a combined Docking and Density Functional Theory (DFT) approach, we investigated in-silico the molecular mechanism by which ebselen (IUPAC: 2-phenyl-1,2-benzoselenazol-3-one), the most famous and pharmacologically active organoselenide, inhibits Mpro. For the first time, we report on a mechanistic investigation in an enzyme for the formation of the covalent -S-Se- bond between ebselen and a key enzymatic cysteine. The results highlight the strengths and weaknesses of ebselen and provide hints for a rational drug design of bioorganic selenium-based inhibitors.
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10
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Madabeni A, Nogara PA, Bortoli M, Rocha JB, Orian L. Effect of Methylmercury Binding on the Peroxide-Reducing Potential of Cysteine and Selenocysteine. Inorg Chem 2021; 60:4646-4656. [PMID: 33587617 PMCID: PMC8763373 DOI: 10.1021/acs.inorgchem.0c03619] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Indexed: 01/09/2023]
Abstract
Methylmercury (CH3Hg+) binding to catalytically fundamental cysteine and selenocysteine of peroxide-reducing enzymes has long been postulated as the origin of its toxicological activity. Only very recently, CH3Hg+ binding to the selenocysteine of thioredoxin reductase has been directly observed [Pickering, I. J. Inorg. Chem., 2020, 59, 2711-2718], but the precise influence of the toxicant on the peroxide-reducing potential of such a residue has never been investigated. In this work, we employ state-of-the-art density functional theory calculations to study the reactivity of molecular models of the free and toxified enzymes. Trends in activation energies are discussed with attention to the biological consequences and are rationalized within the chemically intuitive framework provided by the activation strain model. With respect to the free, protonated amino acids, CH3Hg+ binding promotes oxidation of the S or Se nucleus, suggesting that chalcogenoxide formation might occur in the toxified enzyme, even if the actual rate of peroxide reduction is almost certainly lowered as suggested by comparison with fully deprotonated amino acids models.
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Affiliation(s)
- Andrea Madabeni
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Pablo A. Nogara
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
- Departamento
de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), 97105-900 Santa
Maria, RS, Brazil
| | - Marco Bortoli
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - João B.
T. Rocha
- Departamento
de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), 97105-900 Santa
Maria, RS, Brazil
| | - Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
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Dalla Tiezza M, Bickelhaupt FM, Flohé L, Orian L. Proton Transfer and S N 2 Reactions as Steps of Fast Selenol and Thiol Oxidation in Proteins: A Model Molecular Study Based on GPx. Chempluschem 2020; 86:525-532. [PMID: 33215863 DOI: 10.1002/cplu.202000660] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/06/2020] [Indexed: 11/10/2022]
Abstract
The so-called peroxidatic cysteines and selenocysteines in proteins reduce hydroperoxides through a dual attack to the peroxide bond in a two-step mechanism. First, a proton dislocation from the thiol/selenol to a close residue of the enzymatic pocket occurs. Then, a nucleophilic attack of the anionic cysteine/selenocysteine to one O atom takes place, while the proton is shuttled back to the second O atom, promoting the formation of a water molecule. In this computational study, we use a molecular model of GPx to demonstrate that the enzymatic environment significantly lowers the barrier of the latter SN 2 step. Particularly, in our Se-based model the energy barriers for the two steps are 29.82 and 2.83 kcal mol-1 , both higher than the corresponding barriers computed in the enzymatic cluster, i. e., 21.60 and null, respectively. Our results, obtained at SMD-B3LYP-D3(BJ)/6-311+G(d,p), cc-pVTZ//B3LYP-D3(BJ)/6-311G(d,p), cc-pVTZ level of theory, show that the mechanistic details can be well reproduced using an oversimplified model, but the energetics is definitively more favorable in the GPx active site. In addition, we pinpoint the role of the chalcogen in the peroxide reduction process, rooting the advantages of the presence of selenium in its acidic and nucleophilic properties.
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Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam (The, Netherlands.,Institute for Molecules and Materials (IMM), Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen (The, Netherlands
| | - Leopold Flohé
- Dipartimento di Medicina Molecolare, Università degli Studi di Padova, v.le G. Colombo 3, 35121, Padova, Italy.,Departamento de Bioquímica, Universidad de la República, Avda. General Flores 2125, 11800, Montevideo, Uruguay
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
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12
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Kunwar A, Priyadarsini KI, Jain VK. 3,3'-Diselenodipropionic acid (DSePA): A redox active multifunctional molecule of biological relevance. Biochim Biophys Acta Gen Subj 2020; 1865:129768. [PMID: 33148501 DOI: 10.1016/j.bbagen.2020.129768] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/28/2020] [Accepted: 10/19/2020] [Indexed: 01/05/2023]
Abstract
BACKGROUND Extensive research is being carried out globally to design and develop new selenium compounds for various biological applications such as antioxidants, radio-protectors, anti-carcinogenic agents, biocides, etc. In this pursuit, 3,3'-diselenodipropionic acid (DSePA), a synthetic organoselenium compound, has received considerable attention for its biological activities. SCOPE OF REVIEW This review intends to give a comprehensive account of research on DSePA so as to facilitate further research activities on this organoselenium compound and to realize its full potential in different areas of biological and pharmacological sciences. MAJOR CONCLUSIONS It is an interesting diselenide structurally related to selenocystine. It shows moderate glutathione peroxidase (GPx)-like activity and is an excellent scavenger of reactive oxygen species (ROS). Exposure to radiation, as envisaged during radiation therapy, has been associated with normal tissue side effects and also with the decrease in selenium levels in the body. In vitro and in vivo evaluation of DSePA has confirmed its ability to reduce radiation induced side effects into normal tissues. Administration of DSePA through intraperitoneal (IP) or oral route to mice in a dose range of 2 to 2.5 mg/kg body weight has shown survival advantage against whole body irradiation and a significant protection to lung tissue against thoracic irradiation. Pharmacokinetic profiling of DSePA suggests its maximum absorption in the lung. GENERAL SIGNIFICANCE Research work on DSePA reported in fifteen years or so indicates that it is a promising multifunctional organoselenium compound exhibiting many important activities of biological relevance apart from radioprotection.
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Affiliation(s)
- A Kunwar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India.
| | - K Indira Priyadarsini
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz (E), Mumbai 400098, India.
| | - Vimal K Jain
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz (E), Mumbai 400098, India.
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13
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Daolio A, Scilabra P, Di Pietro ME, Resnati C, Rissanen K, Resnati G. Binding motif of ebselen in solution: chalcogen and hydrogen bonds team up. NEW J CHEM 2020. [DOI: 10.1039/d0nj04647g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Ebselen, a compound active against SARS-CoV-2, forms a bifurcated supramolecular synthon thanks to chalcogen bond and hydrogen bond cooperation.
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Affiliation(s)
- Andrea Daolio
- Department of Chemistry
- Materials
- Chemical Engineering “Giulio Natta”
- Milano I-20131
- Italy
| | - Patrick Scilabra
- Department of Chemistry
- Materials
- Chemical Engineering “Giulio Natta”
- Milano I-20131
- Italy
| | | | - Chiara Resnati
- Recidency Program Clinical Pharmacology & Toxicology
- Università degli Studi della Campania “Luigi Vanvitelli”
- Napoli I-80138
- Italy
| | - Kari Rissanen
- Department Chemistry
- University of Jyväskylä
- Jyväskylä
- Finland
| | - Giuseppe Resnati
- Department of Chemistry
- Materials
- Chemical Engineering “Giulio Natta”
- Milano I-20131
- Italy
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14
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Agostini A, Dal Farra MG, Paulsen H, Polimeno A, Orian L, Di Valentin M, Carbonera D. Similarity and Specificity of Chlorophyll b Triplet State in Comparison to Chlorophyll a as Revealed by EPR/ENDOR and DFT Calculations. J Phys Chem B 2019; 123:8232-8239. [DOI: 10.1021/acs.jpcb.9b07912] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alessandro Agostini
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
- Institute of Molecular Physiology, Johannes Gutenberg University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Maria Giulia Dal Farra
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Harald Paulsen
- Institute of Molecular Physiology, Johannes Gutenberg University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Antonino Polimeno
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Marilena Di Valentin
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Donatella Carbonera
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
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15
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Bortoli M, Zaccaria F, Dalla Tiezza M, Bruschi M, Fonseca Guerra C, Bickelhaupt FM, Orian L. Oxidation of organic diselenides and ditellurides by H 2O 2 for bioinspired catalyst design. Phys Chem Chem Phys 2019; 20:20874-20885. [PMID: 30066704 DOI: 10.1039/c8cp02748j] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The reactivity of diselenides and ditellurides of general formula (RX)2 (X = Se, Te; R = H, CH3, Ph) toward hydrogen peroxide was studied through a computational approach based on accurate Density Functional Theory (DFT) calculations. The aliphatic and aromatic dichalcogenides have been chosen in light of their activity in glutathione peroxidase (GPx)-like catalytic cycles and their promising features as efficient antioxidant compounds. The reaction products, the energetics and the mechanistic details of these oxidations are discussed. Analogous disulfides are included in our analysis for completeness. We find that the barrier for oxidation of dichalcogenides decreases from disulfides to diselenides to ditellurides. On the other hand, variation of the substituents at the chalcogen nucleus has relatively little effect on the reactivity.
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Affiliation(s)
- Marco Bortoli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy.
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16
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Khurana A, Tekula S, Saifi MA, Venkatesh P, Godugu C. Therapeutic applications of selenium nanoparticles. Biomed Pharmacother 2019; 111:802-812. [DOI: 10.1016/j.biopha.2018.12.146] [Citation(s) in RCA: 292] [Impact Index Per Article: 58.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 12/18/2018] [Accepted: 12/31/2018] [Indexed: 12/12/2022] Open
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17
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Foo CHJ, Pervaiz S. gRASping the redox lever to modulate cancer cell fate signaling. Redox Biol 2019; 25:101094. [PMID: 30638892 PMCID: PMC6859584 DOI: 10.1016/j.redox.2018.101094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/22/2018] [Accepted: 12/26/2018] [Indexed: 01/17/2023] Open
Abstract
RAS proteins are critical regulators of signaling networks controlling diverse cellular functions such as cell proliferation and survival and its mutation are among the most powerful oncogenic drivers in human cancers. Despite intense efforts, direct RAS-targeting strategies remain elusive due to its "undruggable" nature. To that end, bulk of the research efforts has been directed towards targeting upstream and/or downstream of RAS signaling. However, the therapeutic efficacies of these treatments are limited in the long run due to the acquired drug resistance in RAS-driven cancers. Interestingly, recent studies have uncovered a potential role of RAS in redox-regulation as well as the interplay between ROS and RAS-associated signaling networks during process of cancer initiation and progression. More specifically, these studies provide ample evidence to implicate RAS as a redox-rheostat, manipulating ROS levels to provide a redox-milieu conducive for carcinogenesis. Importantly, the understanding of RAS-ROS interplay could provide us with novel targetable vulnerabilities for designing therapeutic strategies. In this review, we provide a brief summary of the advances in the field to illustrate the dual role of RAS in redox-regulation and its implications in RAS signaling outcomes and also emerging redox-based strategies to target RAS-driven cancers.
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Affiliation(s)
- Chuan Han Jonathan Foo
- Department of Physiology, YLL School of Medicine, National University of Singapore (NUS), Singapore; NUS Graduate School of Integrative Sciences and Engineering, NUS, Singapore
| | - Shazib Pervaiz
- Department of Physiology, YLL School of Medicine, National University of Singapore (NUS), Singapore; Medical Science Cluster Cancer Program, YLL School of Medicine, National University of Singapore (NUS), Singapore; NUS Graduate School of Integrative Sciences and Engineering, NUS, Singapore; National University Cancer Institute, NUHS, Singapore.
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18
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Chong SJF, Lai JXH, Eu JQ, Bellot GL, Pervaiz S. Reactive Oxygen Species and Oncoprotein Signaling-A Dangerous Liaison. Antioxid Redox Signal 2018; 29:1553-1588. [PMID: 29186971 DOI: 10.1089/ars.2017.7441] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
SIGNIFICANCE There is evidence to implicate reactive oxygen species (ROS) in tumorigenesis and its progression. This has been associated with the interplay between ROS and oncoproteins, resulting in enhanced cellular proliferation and survival. Recent Advances: To date, studies have investigated specific contributions of the crosstalk between ROS and signaling networks in cancer initiation and progression. These investigations have challenged the established dogma of ROS as agents of cell death by demonstrating a secondary function that fuels cell proliferation and survival. Studies have thus identified (onco)proteins (Bcl-2, STAT3/5, RAS, Rac1, and Myc) in manipulating ROS level as well as exploiting an altered redox environment to create a milieu conducive for cancer formation and progression. CRITICAL ISSUES Despite these advances, drug resistance and its association with an altered redox metabolism continue to pose a challenge at the mechanistic and clinical levels. Therefore, identifying specific signatures, altered protein expressions, and modifications as well as protein-protein interplay/function could not only enhance our understanding of the redox networks during cancer initiation and progression but will also provide novel targets for designing specific therapeutic strategies. FUTURE DIRECTIONS Not only a heightened realization is required to unravel various gene/protein networks associated with cancer formation and progression, particularly from the redox standpoint, but there is also a need for developing more sensitive tools for assessing cancer redox metabolism in clinical settings. This review attempts to summarize our current knowledge of the crosstalk between oncoproteins and ROS in promoting cancer cell survival and proliferation and treatment strategies employed against these oncoproteins. Antioxid. Redox Signal.
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Affiliation(s)
- Stephen Jun Fei Chong
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore
| | - Jolin Xiao Hui Lai
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore
| | - Jie Qing Eu
- 2 Cancer Science Institute , Singapore, Singapore
| | - Gregory Lucien Bellot
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore .,3 Department of Hand and Reconstructive Microsurgery, National University Health System , Singapore, Singapore
| | - Shazib Pervaiz
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore .,4 NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Singapore, Singapore .,5 National University Cancer Institute, National University Health System , Singapore, Singapore .,6 School of Biomedical Sciences, Curtin University , Perth, Australia
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19
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Wang C, Bourland WA, Mu W, Pan X. Transcriptome analysis on chlorpyrifos detoxification in Uronema marinum (Ciliophora, Oligohymenophorea). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:33402-33414. [PMID: 30264342 DOI: 10.1007/s11356-018-3195-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Chlorpyrifos (CPF) pollution has drawn widespread concerns in aquatic environments due to its risks to ecologic system, however, the response mechanisms of ciliates to CPF pollution were poorly studied. In our current work, the degradation of CPF by ciliates and the morphological changes of ciliates after CPF exposure were investigated. In addition, the transcriptomic profiles of the ciliate Uronema marinum, with and without exposure with CPF, were detected using digital gene expression technologies. De novo transcriptome assembly 166,829,634 reads produced from three groups (untreated, CPF treatment at 12 h and 24 h) by whole transcriptome sequencing (RNA-Seq). Gene ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathways were analyzed in all unigenes and different expression genes to identify their biological functions and processes. Furthermore, the results indicated that genes related to the stress response, cytoskeleton and cell structure proteins, and antioxidant systems might play an important role in the resistance mechanism of ciliates. The enzyme activities of SOD and GST after CPF stress were also analyzed, and the result showed the good antioxidant capacity of SOD and GST in ciliates inferred from the increase of the activities of the two enzymes. The ciliate Uronema marinum showed a resistance response to chlorpyrifos stress at the transcriptomic level in the present work, which indicates that ciliates can be considered as a potential bioremediation agent.
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Affiliation(s)
- Chongnv Wang
- College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - William A Bourland
- Department of Biological Sciences, Boise State University, Boise, ID, 83725-1515, USA
| | - Weijie Mu
- College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China.
| | - Xuming Pan
- College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China.
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20
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Heritability of the aged glutathione phenotype is dependent on tissue of origin. Mamm Genome 2018; 29:619-631. [DOI: 10.1007/s00335-018-9759-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/07/2018] [Indexed: 01/30/2023]
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21
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Bortoli M, Torsello M, Bickelhaupt FM, Orian L. Role of the Chalcogen (S, Se, Te) in the Oxidation Mechanism of the Glutathione Peroxidase Active Site. Chemphyschem 2017; 18:2990-2998. [DOI: 10.1002/cphc.201700743] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Marco Bortoli
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35129 Padova Italy
| | | | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM); Vrije Universiteit Amsterdam; De Boelelaan 1083 1081 HV Amsterdam The Netherlands
- Institute for Molecules and Materials (IMM); Radboud University; Heyendaalseweg 135 6525 J Nijmegen The Netherlands
| | - Laura Orian
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35129 Padova Italy
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22
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Xia J, Li F, Ji S, Xu H. Selenium-Functionalized Graphene Oxide That Can Modulate the Balance of Reactive Oxygen Species. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21413-21421. [PMID: 28586192 DOI: 10.1021/acsami.7b05951] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Graphene oxide (GO) is an important two-dimensional material since it is water-soluble and can be functionalized to adapt to different applications. However, the current covalent functionalization methods usually require hash conditions, long duration, and sometimes even multiple steps, while noncovalent functionalization is inevitably unstable, especially under a physiological environment where competing species exist. Diselenide bond is a dynamic covalent bond and can respond to both redox conditions and visible light irradiation in a sensitive manner. Thus, in this work by combining the stimuli response of diselenide bond and the oxidative/radical attackable nature of GO, we achieved the in situ covalent functionalization of GO simply by stirring GO with diselenide-containing molecules in aqueous solution. The covalent functionalization was proved by Fourier transform infrared, time-of-flight secondary ion mass spectrometry, atomic force microscopy, thermogravimetric analysis, and so forth, and the functionalization mechanism was deduced to involve both redox reaction and radical addition reaction according to the X-ray photoelectron spectrscopy, atomic emission spectroscopy, and Raman spectroscopy. Moreover, we modified GO with a biocompatible diselenide-containing polymer (mPEGSe)2 and found selenium-functionalized GO could modulate the balance of reactive oxygen species (ROS). GOSe could decrease ROS level by accelerating the reduction of peroxides when the ROS concentration is high while boosting the ROS level by in situ generating ROS when its concentration is relatively low.
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Affiliation(s)
- Jiahao Xia
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, People's Republic of China
| | - Feng Li
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, People's Republic of China
| | - Shaobo Ji
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, People's Republic of China
| | - Huaping Xu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, People's Republic of China
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23
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Ribaudo G, Bellanda M, Menegazzo I, Wolters LP, Bortoli M, Ferrer-Sueta G, Zagotto G, Orian L. Mechanistic Insight into the Oxidation of Organic Phenylselenides by H 2 O 2. Chemistry 2017; 23:2405-2422. [PMID: 27935210 DOI: 10.1002/chem.201604915] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Indexed: 12/24/2022]
Abstract
The oxidation of organic phenylselenides by H2 O2 is investigated in model compounds, namely, n-butyl phenyl selenide (PhSe(nBu)), bis(phenylselanyl)methane (PhSeMeSePh), diphenyl diselenide (PhSeSePh), and 1,2-bis(phenylselanyl)ethane (PhSeEtSePh). Through a combined experimental (1 H and 77 Se NMR) and computational approach, we characterize the direct oxidation of monoselenide to selenoxide, the stepwise double oxidation of PhSeMeSePh that leads to different diastereomeric diselenoxides, the complete oxidation of the diphenyldiselenide that leads to selenium-selenium bond cleavage, and the subsequent formation of the phenylseleninic product. The oxidation of PhSeEtSePh also results in the formation of phenylseleninic acid along with 1-(vinylseleninyl)benzene, which is derived from a side elimination reaction. The evidence of a direct mechanism, in addition to an autocatalytic mechanism that emerges from kinetic studies, is discussed. By considering our observations of diselenides with chalcogen atoms that are separated by alkyl spacers of different length, a rationale for the advantage of diselenide versus monoselenide catalysts is presented.
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Affiliation(s)
- Giovanni Ribaudo
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via Marzolo 5, 35131, Padova, Italy
| | - Massimo Bellanda
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Ileana Menegazzo
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Lando P Wolters
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Marco Bortoli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Gerardo Ferrer-Sueta
- Laboratorio de Fisicoquímica Biológica, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la Repúbica, Igua 4225, Montevideo, Uruguay
| | - Giuseppe Zagotto
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via Marzolo 5, 35131, Padova, Italy
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
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24
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Computational kinetic modeling of the selenol catalytic activity as the glutathione peroxidase nanomimic. J Theor Biol 2016; 409:108-114. [PMID: 27596529 DOI: 10.1016/j.jtbi.2016.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 08/01/2016] [Accepted: 09/01/2016] [Indexed: 11/21/2022]
Abstract
Density functional theory and solvent-assisted proton exchange methods have been applied for computational modeling of the catalytic cycle of selenol zwitterion anion from the kinetic and thermodynamic viewpoints. Selenol zwitterion anion has been represented as an effective glutathione peroxidase nanomimic. It reduces peroxides through a three-step pathway. In the first step, seleninic acid is produced through deprotonating of the selenol zwitterion anion in the presence of the hydrogen peroxide. Seleninic acid reacts with a thiol to form selenylsulfide in the second step. In the last step, selenylsulfide is reduced by the second thiol and regenerates selenolate anion through disulfide formation. Selenol zwitterion anion in comparison to more widely studied compounds such as ebselen has a good activity to react with hydrogen peroxide and producing seleninic acid. The energy barrier of this reaction is 11.7kcalmol-1 which is smaller than the reported enzyme mimics. Moreover, the reactions of seleninic acid and selenylsulfide with methanethiol, which is used as a nucleophile, are exothermic by -18.4 or -57.0kcalmol-1, respectively. Based on the global electron density transfer value of -0.507 e from the natural atomic charge analysis, an electronic charge depletion at the transition state (TS), electron-donor substitutions on the selenolate facilitates the reduction reaction, effectively. Finally, the nature of the bond formation/cleavage at the TS has been quantitatively described by using the topological analyses.
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25
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Rindler PM, Cacciola A, Kinter M, Szweda LI. Catalase-dependent H2O2 consumption by cardiac mitochondria and redox-mediated loss in insulin signaling. Am J Physiol Heart Circ Physiol 2016; 311:H1091-H1096. [PMID: 27614223 DOI: 10.1152/ajpheart.00066.2016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 09/01/2016] [Indexed: 12/23/2022]
Abstract
We have recently demonstrated that catalase content in mouse cardiac mitochondria is selectively elevated in response to high dietary fat, a nutritional state associated with oxidative stress and loss in insulin signaling. Catalase and various isoforms of glutathione peroxidase and peroxiredoxin each catalyze the consumption of H2O2 Catalase, located primarily within peroxisomes and to a lesser extent mitochondria, has a low binding affinity for H2O2 relative to glutathione peroxidase and peroxiredoxin. As such, the contribution of catalase to mitochondrial H2O2 consumption is not well understood. In the current study, using highly purified cardiac mitochondria challenged with micromolar concentrations of H2O2, we found that catalase contributes significantly to mitochondrial H2O2 consumption. In addition, catalase is solely responsible for removal of H2O2 in nonrespiring or structurally disrupted mitochondria. Finally, in mice fed a high-fat diet, mitochondrial-derived H2O2 is responsible for diminished insulin signaling in the heart as evidenced by reduced insulin-stimulated Akt phosphorylation. While elevated mitochondrial catalase content (∼50%) enhanced the capacity of mitochondria to consume H2O2 in response to high dietary fat, the selective increase in catalase did not prevent H2O2-induced loss in cardiac insulin signaling. Taken together, our results indicate that mitochondrial catalase likely functions to preclude the formation of high levels of H2O2 without perturbing redox-dependent signaling.
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Affiliation(s)
- Paul M Rindler
- Affiliation: Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Angela Cacciola
- Affiliation: Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Michael Kinter
- Affiliation: Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Luke I Szweda
- Affiliation: Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
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26
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Dal S, Sigrist S. The Protective Effect of Antioxidants Consumption on Diabetes and Vascular Complications. Diseases 2016; 4:E24. [PMID: 28933404 PMCID: PMC5456287 DOI: 10.3390/diseases4030024] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/20/2016] [Accepted: 06/23/2016] [Indexed: 12/14/2022] Open
Abstract
Obesity and diabetes is generally accompanied by a chronic state of oxidative stress, disequilibrium in the redox balance, implicated in the development and progression of complications such as micro- and macro-angiopathies. Disorders in the inner layer of blood vessels, the endothelium, play an early and critical role in the development of these complications. Blunted endothelium-dependent relaxation and/or contractions are quietly associated to oxidative stress. Thus, preserving endothelial function and oxidative stress seems to be an optimization strategy in the prevention of vascular complications associated with diabetes. Diet is a major lifestyle factor that can greatly influence the incidence and the progression of type 2 diabetes and cardiovascular complications. The notion that foods not only provide basic nutrition but can also prevent diseases and ensure good health and longevity is now attained greater prominence. Some dietary and lifestyle modifications associated to antioxidative supply could be an effective prophylactic means to fight against oxidative stress in diabesity and complications. A significant benefit of phytochemicals (polyphenols in wine, grape, teas), vitamins (ascorbate, tocopherol), minerals (selenium, magnesium), and fruits and vegetables in foods is thought to be capable of scavenging free radicals, lowering the incidence of chronic diseases. In this review, we discuss the role of oxidative stress in diabetes and complications, highlight the endothelial dysfunction, and examine the impact of antioxidant foods, plants, fruits, and vegetables, currently used medication with antioxidant properties, in relation to the development and progression of diabetes and cardiovascular complications.
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Affiliation(s)
- Stéphanie Dal
- DIATHEC EA 7294 UMR Centre Européen d'Etude du Diabète (CeeD), Université de Strasbourg (UdS), boulevard René Leriche, Strasbourg 67200, France.
| | - Séverine Sigrist
- DIATHEC EA 7294 UMR Centre Européen d'Etude du Diabète (CeeD), Université de Strasbourg (UdS), boulevard René Leriche, Strasbourg 67200, France.
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Torsello M, Pimenta AC, Wolters LP, Moreira IS, Orian L, Polimeno A. General AMBER Force Field Parameters for Diphenyl Diselenides and Diphenyl Ditellurides. J Phys Chem A 2016; 120:4389-400. [DOI: 10.1021/acs.jpca.6b02250] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mauro Torsello
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, Via
Marzolo 1, 35131 Padova, Italy
| | - Antonio C. Pimenta
- CNC−Center for Neuroscience
and Cell Biology, Universidade de Coimbra, Rua Larga, FMUC, Polo I, 1°andar, 3004-517 Coimbra, Portugal
| | - Lando P. Wolters
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, Via
Marzolo 1, 35131 Padova, Italy
| | - Irina S. Moreira
- CNC−Center for Neuroscience
and Cell Biology, Universidade de Coimbra, Rua Larga, FMUC, Polo I, 1°andar, 3004-517 Coimbra, Portugal
| | - Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, Via
Marzolo 1, 35131 Padova, Italy
| | - Antonino Polimeno
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, Via
Marzolo 1, 35131 Padova, Italy
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Jiang JH, Zhou H, Li HJ, Wang YC, Tian M, Huang YL, Deng P. Comprehensive modeling of the antioxidant mechanism of ebselen. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s0219633615500534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Three possible catalytic cycles for ebselen have been comprehensively modeled by theoretical calculations using density functional theory (DFT) at a mixed basis set level; the 6-31G(d) basis set for hydrocarbon fragments and the 6-31[Formula: see text]G(d,p) basis set for other atoms. The 2[Formula: see text] cycle is the main pathway in the glutathione peroxidase (GPx) cycle (cycle A), and IM3[Formula: see text]TS3 is the rate controlling process. The 1[Formula: see text]1 cycle is the main pathway for the oxidation cycle (cycle B), and the rate controlling step is the [Formula: see text] step. Ebselen reacts with the selenol 3 to form the diselenide 9, and this is the rate controlling step for cycle C. The extremely high energy barrier for the IM9[Formula: see text]TS9 process indicates that cycle C is unlikely to occur in vivo. Although cycle B is favored based on the energy analysis, with a maximum energy barrier of only 26.68[Formula: see text]kcal/mol at the mixed basis set level, it is generally unlikely to have very high concentrations of peroxides present in vivo. The results indicate that in order to improve the antioxidant activity of ebselen, it would be necessary to suitably modify the molecular structure of ebselen to reduce the energy barrier of the IM3[Formula: see text]TS3 process.
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Affiliation(s)
- Jun-Hao Jiang
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Hui Zhou
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
- Chongqing Key Laboratory of Biochemistry and Molecular Biology, Chongqing Medical University, Chongqing 400016, P. R. China
| | - Hui-Jie Li
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Yu-Chun Wang
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Mei Tian
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Ya-Lin Huang
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Ping Deng
- School of Pharmacy, Chongqing Medical University, Chongqing, 400016, P. R. China
- Chongqing Key Laboratory of Biochemistry and Molecular Biology, Chongqing Medical University, Chongqing 400016, P. R. China
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The Role of Oxidative Stress-Induced Epigenetic Alterations in Amyloid-β Production in Alzheimer's Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:604658. [PMID: 26543520 PMCID: PMC4620382 DOI: 10.1155/2015/604658] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 12/15/2014] [Indexed: 11/17/2022]
Abstract
An increasing number of studies have proposed a strong correlation between reactive oxygen species (ROS)-induced oxidative stress (OS) and the pathogenesis of Alzheimer's disease (AD). With over five million people diagnosed in the United States alone, AD is the most common type of dementia worldwide. AD includes progressive neurodegeneration, followed by memory loss and reduced cognitive ability. Characterized by the formation of amyloid-beta (Aβ) plaques as a hallmark, the connection between ROS and AD is compelling. Analyzing the ROS response of essential proteins in the amyloidogenic pathway, such as amyloid-beta precursor protein (APP) and beta-secretase (BACE1), along with influential signaling programs of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and c-Jun N-terminal kinase (JNK), has helped visualize the path between OS and Aβ overproduction. In this review, attention will be paid to significant advances in the area of OS, epigenetics, and their influence on Aβ plaque assembly. Additionally, we aim to discuss available treatment options for AD that include antioxidant supplements, Asian traditional medicines, metal-protein-attenuating compounds, and histone modifying inhibitors.
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Orian L, Mauri P, Roveri A, Toppo S, Benazzi L, Bosello-Travain V, De Palma A, Maiorino M, Miotto G, Zaccarin M, Polimeno A, Flohé L, Ursini F. Selenocysteine oxidation in glutathione peroxidase catalysis: an MS-supported quantum mechanics study. Free Radic Biol Med 2015; 87:1-14. [PMID: 26163004 DOI: 10.1016/j.freeradbiomed.2015.06.011] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/18/2015] [Accepted: 06/09/2015] [Indexed: 12/31/2022]
Abstract
Glutathione peroxidases (GPxs) are enzymes working with either selenium or sulfur catalysis. They adopted diverse functions ranging from detoxification of H(2)O(2) to redox signaling and differentiation. The relative stability of the selenoenzymes, however, remained enigmatic in view of the postulated involvement of a highly unstable selenenic acid form during catalysis. Nevertheless, density functional theory calculations obtained with a representative active site model verify the mechanistic concept of GPx catalysis and underscore its efficiency. However, they also allow that the selenenic acid, in the absence of the reducing substrate, reacts with a nitrogen in the active site. MS/MS analysis of oxidized rat GPx4 complies with the predicted structure, an 8-membered ring, in which selenium is bound as selenenylamide to the protein backbone. The intermediate can be re-integrated into the canonical GPx cycle by glutathione, whereas, under denaturing conditions, its selenium moiety undergoes β-cleavage with formation of a dehydro-alanine residue. The selenenylamide bypass prevents destruction of the redox center due to over-oxidation of the selenium or its elimination and likely allows fine-tuning of GPx activity or alternate substrate reactions for regulatory purposes.
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Affiliation(s)
- Laura Orian
- Department of Chemistry, University of Padova, Italy
| | - Pierluigi Mauri
- Institute for Biomedical Technologies, National Research Council, Milano, Italy
| | | | - Stefano Toppo
- Department of Molecular Medicine, University of Padova, Italy
| | - Louise Benazzi
- Institute for Biomedical Technologies, National Research Council, Milano, Italy
| | | | - Antonella De Palma
- Institute for Biomedical Technologies, National Research Council, Milano, Italy
| | | | - Giovanni Miotto
- Department of Molecular Medicine, University of Padova, Italy
| | - Mattia Zaccarin
- Department of Molecular Medicine, University of Padova, Italy
| | | | - Leopold Flohé
- Department of Molecular Medicine, University of Padova, Italy.
| | - Fulvio Ursini
- Department of Molecular Medicine, University of Padova, Italy
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31
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Orian L, Toppo S. Organochalcogen peroxidase mimetics as potential drugs: a long story of a promise still unfulfilled. Free Radic Biol Med 2014; 66:65-74. [PMID: 23499840 DOI: 10.1016/j.freeradbiomed.2013.03.006] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 03/04/2013] [Accepted: 03/05/2013] [Indexed: 12/14/2022]
Abstract
Organochalcogen compounds have attracted the interest of a multitude of studies to design potential therapeutic agents mimicking the peroxidase activity of selenium-based glutathione peroxidases (GPx's). Starting from the pioneering ebselen, various compounds have been synthesized over the years, which may be traced in three major classes of molecules: cyclic selenenyl amides, diaryl diselenides, and aromatic or aliphatic monoselenides. These compounds share common features and determinants needed to exert an efficient GPx-like activity, such as polarizing groups in close proximity to selenium and steric effects. Nonetheless, the reactivity of selenium, and tellurium as well, poses serious problems for the predictability of the biological effects of these compounds in vivo when used as potential drugs. These molecules, indeed, interfere with thiols of redox-regulated proteins and enzymes, leading to unexpected biological effects. The various chemical aspects of the reaction mechanism of peroxidase mimetics are surveyed here, focusing on experimental evidence and quantum mechanics calculations of organochalcogen representatives of the various classes.
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Affiliation(s)
- Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, 35129 Padova, Italy.
| | - Stefano Toppo
- Dipartimento di Medicina Molecolare, Università degli Studi di Padova, 35121 Padova, Italy.
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32
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Takei T, Urabe Y, Asahina Y, Hojo H, Nomura T, Dedachi K, Arai K, Iwaoka M. Model Study Using Designed Selenopeptides on the Importance of the Catalytic Triad for the Antioxidative Functions of Glutathione Peroxidase. J Phys Chem B 2013; 118:492-500. [DOI: 10.1021/jp4113975] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Toshiki Takei
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Yoshiko Urabe
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Yuya Asahina
- Department
of Applied Biochemistry, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Hironobu Hojo
- Department
of Applied Biochemistry, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Takeshi Nomura
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Kenichi Dedachi
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Kenta Arai
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Michio Iwaoka
- Department
of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
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33
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Han X, Fan Z, Yu Y, Liu S, Hao Y, Huo R, Wei J. Expression and characterization of recombinant human phospholipid hydroperoxide glutathione peroxidase. IUBMB Life 2013; 65:951-6. [PMID: 24170573 DOI: 10.1002/iub.1220] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Accepted: 10/01/2013] [Indexed: 01/17/2023]
Abstract
Phospholipid hydroperoxide glutathione peroxidase (PHGPx or GPx4; EC1.11.1.12) is a selenoperoxidase that can directly reduce phospholipid and cholesterol hydroperoxides. The mature cytoplasmic GPx4 is a monomeric protein with molecular weight of 19.5 kDa. In this study, human GPx4 (hGPx4) gene was amplified from the complementary DNA library of human hepatoma cell line. Eukaryotic expression plasmid pSelExpress1-leader-GPx4 was constructed and transfected into the eukaryotic cells HEK293T. Expression of hGPx4 was detected by Western blotting, and the target protein was purified by immobilized metal affinity chromatography. The results of the activity and kinetics of the purified protein show that the obtained protein follows a "ping-pong" mechanism, which is similar to that of native cytosolic glutathione peroxidase (GPx1; EC1.11.1.9). This is the first time that hGPx4 could be expressed and purified from HEK293T cells, and this work will provide an important resource of hGPx4 for its functional study in vitro and in vivo.
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Affiliation(s)
- Xiao Han
- College of Pharmaceutical Science, Jilin University, Changchun, China
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34
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Sahu C, Sen K, Pakhira S, Mondal B, Das AK. Binding affinity of substituted ureido-benzenesulfonamide ligands to the carbonic anhydrase receptor: a theoretical study of enzyme inhibition. J Comput Chem 2013; 34:1907-16. [PMID: 23712937 DOI: 10.1002/jcc.23335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 04/25/2013] [Accepted: 04/26/2013] [Indexed: 01/23/2023]
Abstract
The binding properties of a series of benzenesulfonamide inhibitors (4-substituted-ureido-benzenesulfonamides, UBSAs) of human carbonic anhydrase II (hCA II) enzyme with active site residues have been studied using a hybrid quantum mechanical/molecular mechanical (QM/MM) model. To account for the important docking interactions between the UBSAs ligand and hCA II enzyme, a molecular docking program AutoDock Vina is used. The molecular docking results obtained by AutoDock Vina revealed that the docked conformer has root mean square deviation value less than 1.50 Å compared to X-ray crystal structures. The inhibitory activity of UBSA ligands against hCA II is found to be in good agreement with the experimental results. The thermodynamic parameters for inhibitor binding show that hydrogen bonding, hydrophilic, and hydrophobic interactions play a major role in explaining the diverse inhibitory range of these derivatives. Additionally, natural bond orbital analysis is performed to characterize the ligand-metal charge transfer stability. The insights gained from this study have great potential to design new hCA-II inhibitor, 4-[3-(1-p-Tolyl-4-trifluoromethyl-1H-pyrazol-3-yl)-ureido]-benzenesulfonamide, which belongs to the family of UBSA inhibitors and shows similar type of inhibitor potency with hCA II. This work also reveals that a QM/MM model and molecular docking method are computationally feasible and accurate for studying substrate-protein inhibition.
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Affiliation(s)
- Chandan Sahu
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
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35
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Bayse CA, Ortwine KN. Modeling the Glutathione Peroxidase-Like Activity of a Cyclic Seleninate by DFT and Solvent-Assisted Proton Exchange. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300279] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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36
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Li M, Zheng Y, Liang H, Zou L, Sun J, Zhang Y, Qin F, Liu S, Wang Z. Molecular cloning and characterization of cat, gpx1 and Cu/Zn-sod genes in pengze crucian carp (Carassius auratus var. Pengze) and antioxidant enzyme modulation induced by hexavalent chromium in juveniles. Comp Biochem Physiol C Toxicol Pharmacol 2013; 157:310-21. [PMID: 23462276 DOI: 10.1016/j.cbpc.2013.02.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 01/31/2013] [Accepted: 02/19/2013] [Indexed: 11/20/2022]
Abstract
Hexavalent chromium (Cr(6+)) is a common pollutant transient metal with high toxicity in the environment. The toxicological effects partly result from oxidative damage due to the production of excessive reactive oxygen species (ROS) in the reductive process of Cr(6+). To explore the influence of ROS induced directly by Cr(6+) on the oxidative stress generation and antioxidant system, the full length cDNAs of antioxidant-related genes cat, gpx1 and Cu/Zn-sod were successfully acquired from pengze crucian carp first and analyzed. Furthermore, the mRNA expression of the antioxidant genes encompassing catalase (cat), copper/zinc superoxide dismutase (Cu/Zn-sod) and glutathione peroxidase (gpx1), antioxidant enzyme activities of CAT, SOD, and GPx and total protein content were further studied in the gill, intestine and liver of pengze crucian carp (Carassius auratus var. Pengze) juveniles upon acute exposure to Cr(6+) at concentrations of 0.1, 1.0, 10 and 100 mg/L for 4 days. Differential significant changes of the antioxidant enzymes and gene expression were observed in different tissues. The findings contribute to better understanding the antioxidant mechanisms induced by Cr(6+) and selecting the organic-specific sensitive biomarkers to monitor the safety of the aquatic ecosystem.
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Affiliation(s)
- Meng Li
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi 712100, China
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37
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Cichoski AJ, Rotta RB, Scheuermann G, Cunha Junior A, Barin JS. Investigation of glutathione peroxidase activity in chicken meat under different experimental conditions. FOOD SCIENCE AND TECHNOLOGY 2012. [DOI: 10.1590/s0101-20612012005000107] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to the fact that previous studies on the enzymatic activity of Glutathione peroxidase (GSH-Px) diverge widely in their methodology and results, this study aimed to investigate the influence of different analytical conditions on GSH-Px activity in chicken thighs from broilers that were fed different diets with different sources and concentrations of selenium. GSH-Px activity was evaluated six hours after slaughter and 120 days after frozen storage at -18 ºC. The different analytical conditions included time of pre-incubation (0, 10 and 30 minutes), reaction medium, types of substrate (H2O2 (0.72 mM, 7.2 mM, and 72 mM) and Terc-butil hydroperoxide 15 mM), and different buffer concentrations (buffer 1, potassium phosphate 50 mM pH 7.0 + EDTA 1 mM + mercaptoethanol 1 mM, and buffer 2, tris-HCl 50 mM pH 7.6 + EDTA 1 mM + mercapthanol 5 mM). The results show that the highest GSH-Px activity was observed when enzyme and substrate were in contact at 22 ºC without any pre-incubation, and that, when used at concentrations above 0.72 mM, hydrogen peroxide saturated the GSH-Px enzyme and inhibited its activity. The enzyme presented higher affinity to hydrogen peroxide when compared to terc-butil peroxide, and the addition of a buffer containing mercaptoethanol did not increase GSH-Px enzymatic activity. The activity of GSH-Px was not influenced by the source and concentration of selenium in the diet either. The obtained results allowed the determination of the best temperature of contact between the enzyme and substrate (22 ºC), the optimum concentration, and the type of substrate and buffer to be used. This information is extremely useful for future studies on GSH-Px activity in meat due to the divergence and little information found in the literature.
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38
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Heverly-Coulson GS, Boyd RJ. Mechanism of the Reduction of an Oxidized Glutathione Peroxidase Mimic with Thiols. J Chem Theory Comput 2012; 8:5052-7. [DOI: 10.1021/ct300622r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Russell J. Boyd
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
B3H 4R2
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39
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Molecular Dynamics Simulations and NMR Experimental Study of Oxidized Glutathione in Aqueous Solution. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9835-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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40
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Antony S, Bayse CA. Modeling the Mechanism of the Glutathione Peroxidase Mimic Ebselen. Inorg Chem 2011; 50:12075-84. [DOI: 10.1021/ic201603v] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sonia Antony
- Department of Chemistry and Biochemistry, Old Dominion University, Hampton Boulevard, Norfolk, Virginia 23529, United States
| | - Craig A. Bayse
- Department of Chemistry and Biochemistry, Old Dominion University, Hampton Boulevard, Norfolk, Virginia 23529, United States
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41
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Zhang R, Wu W, Luo S. Different Behaviors of Glutathione in Aqueous and DMSO Solutions: Molecular Dynamics Simulation and NMR Experimental Study. J SOLUTION CHEM 2011. [DOI: 10.1007/s10953-011-9752-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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42
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Zhang R, Wu W. Studies on the structures and interactions of glutathione in aqueous solution by molecular dynamics simulations and NMR spectroscopy. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.05.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Kóňa J, Fabian WMF. Hybrid QM/MM Calculations on the First Redox Step of the Catalytic Cycle of Bovine Glutathione Peroxidase GPX1. J Chem Theory Comput 2011; 7:2610-6. [DOI: 10.1021/ct200129q] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Juraj Kóňa
- Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravska cesta 9, 845 38 Bratislava, Slovak Republic
| | - Walter M. F. Fabian
- Institute of Chemistry, Karl Franzens University, Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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44
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Heverly-Coulson GS, Boyd RJ. Systematic Study of the Performance of Density Functional Theory Methods for Prediction of Energies and Geometries of Organoselenium Compounds. J Phys Chem A 2011; 115:4827-31. [DOI: 10.1021/jp201455f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Russell J. Boyd
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3
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45
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Liu X, Pietsch KE, Sturla SJ. Susceptibility of the antioxidant selenoenyzmes thioredoxin reductase and glutathione peroxidase to alkylation-mediated inhibition by anticancer acylfulvenes. Chem Res Toxicol 2011; 24:726-36. [PMID: 21443269 DOI: 10.1021/tx2000152] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Selenium, in the form of selenocysteine, is a critical component of some major redox-regulating enzymes, including thioredoxin reductase (TrxR) and glutathione peroxidase (Gpx). TrxR has emerged as an anticancer target for drug development due to its elevated expression level in many aggressive human tumors. Acylfulvenes (AFs) are semisynthetic derivatives of the natural product illudin S and display improved cytotoxic selectivity profiles. AF and illudin S alkylate cellular macromolecules. Compared to AFs, illudin S more readily reacts with thiol-containing small molecules such as cysteine, glutathione, and cysteine-containing peptides. However, a previous study indicates that the reactivity of AFs and illudin S with glutathione reductase, a thiol-containing enzyme, is inversely correlated with the reactivity toward small molecule thiols. In this study, we investigate mechanistic aspects underlying the enzymatic and cellular effects of the AFs and illudin S on thioredoxin reductase. Both AF and HMAF were found to inhibit mammalian TrxR in the low- to submicromolar range, but illudin S was significantly less potent. TrxR inhibition by AFs was shown to be irreversible, concentration- and time-dependent, and mediated by alkylation of C-terminus active site Sec/Cys residues. In contrast, neither AFs nor illudin S inhibits Gpx, demonstrating that enzyme structure-specific small molecule interactions have a significant influence over the inherent reactivity of the Sec residue. In human cancer cells, TrxR activity can be inhibited by low micromolar concentrations of all three drugs. Finally, it was demonstrated that preconditioning cells by the addition of selenite to the cell culture media results in an enhancement in cell sensitivity toward AFs. These data suggest potential strategies for increasing drug activity by combination treatments that promote selenium enzyme activity.
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Affiliation(s)
- Xiaodan Liu
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota , Minneapolis 54555, United States
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46
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Effect of long term intake of aspartame on antioxidant defense status in liver. Food Chem Toxicol 2011; 49:1203-7. [PMID: 21376768 DOI: 10.1016/j.fct.2011.02.019] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 02/18/2011] [Accepted: 02/25/2011] [Indexed: 11/21/2022]
Abstract
The present study evaluates the effect of long term intake of aspartame, the artificial sweetener, on liver antioxidant system and hepatocellular injury in animal model. Eighteen adult male Wistar rats, weighing 150-175 g, were randomly divided into three groups as follows: first group was given aspartame dissolved in water in a dose of 500 mg/kg b.wt.; the second group was given a dose of 1000 mg/kg b.wt.; and controls were given water freely. Rats that had received aspartame (1000 mg/kg b.wt.) in the drinking water for 180 days showed a significant increase in activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP) and γ-glutamyl transferase (GGT). The concentration of reduced glutathione (GSH) and the activity of glutathione peroxidase (GPx), and glutathione reductase (GR) were significantly reduced in the liver of rats that had received aspartame (1000 mg/kg b.wt.). Glutathione was significantly decreased in both the experimental groups. Histopathological examination revealed leukocyte infiltration in aspartame-treated rats (1000 mg/kg b.wt.). It can be concluded from these observations that long term consumption of aspartame leads to hepatocellular injury and alterations in liver antioxidant status mainly through glutathione dependent system.
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47
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Bayse CA, Pavlou A. Tuning the activity of glutathione peroxidase mimics through intramolecular Se⋯N,O interactions: A DFT study incorporating solvent-assisted proton exchange (SAPE). Org Biomol Chem 2011; 9:8006-15. [DOI: 10.1039/c1ob05827d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Ali ST, Karamat S, Kóňa J, Fabian WMF. Theoretical Prediction of pKa Values of Seleninic, Selenenic, Sulfinic, and Carboxylic Acids by Quantum-Chemical Methods. J Phys Chem A 2010; 114:12470-8. [DOI: 10.1021/jp102266v] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- S. Tahir Ali
- Institut für Chemie, Karl Franzens Universität Graz, Heinrichstrasse 28, A-8010 Graz, Austria, and Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, 845 38 Bratislava, Slovak Republic
| | - Sajjad Karamat
- Institut für Chemie, Karl Franzens Universität Graz, Heinrichstrasse 28, A-8010 Graz, Austria, and Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, 845 38 Bratislava, Slovak Republic
| | - Juraj Kóňa
- Institut für Chemie, Karl Franzens Universität Graz, Heinrichstrasse 28, A-8010 Graz, Austria, and Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, 845 38 Bratislava, Slovak Republic
| | - Walter M. F. Fabian
- Institut für Chemie, Karl Franzens Universität Graz, Heinrichstrasse 28, A-8010 Graz, Austria, and Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, 845 38 Bratislava, Slovak Republic
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49
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Heverly-Coulson GS, Boyd RJ. Theoretical Investigations on the Reaction of Monosubstituted Tertiary-Benzylamine Selenols with Hydrogen Peroxide. J Phys Chem A 2010; 114:10706-11. [DOI: 10.1021/jp105651x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
| | - Russell J. Boyd
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3
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50
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Bora RP, Barman A, Zhu X, Ozbil M, Prabhakar R. Which One Among Aspartyl Protease, Metallopeptidase, and Artificial Metallopeptidase is the Most Efficient Catalyst in Peptide Hydrolysis? J Phys Chem B 2010; 114:10860-75. [DOI: 10.1021/jp104294x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ram Prasad Bora
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Arghya Barman
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Xiaoxia Zhu
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Mehmet Ozbil
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
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