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Ibrahim M, Meinerz DF, Khan M, Ali A, Khan MI, AlAsmari AF, Alharbi M, Alshammari A, da Rocha JBT, Alasmari F. Genotoxicity and cytotoxicity potential of organoselenium compounds in human leukocytes in vitro. Saudi Pharm J 2023; 31:101832. [PMID: 38125951 PMCID: PMC10730359 DOI: 10.1016/j.jsps.2023.101832] [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: 08/28/2023] [Accepted: 10/14/2023] [Indexed: 12/23/2023] Open
Abstract
In the current work, cytotoxicity and genotoxicity of different organoselenium compounds were examined using Trypan blue exclusion and alkaline comet assays with silver staining respectively. Leukocytes were subjected to a 3-hour incubation with organoselenium compounds at concentrations of 1, 5, 10, 25, 50, and 75 μM, or with the control vehicle (DMSO), at a temperature of 37 °C. The viability of the cells was evaluated using the Trypan blue exclusion method, while DNA damage was analyzed through the alkaline comet assay with silver staining. The exposure of leukocytes to different organoselenium compounds including i.e. (Z)-N-(pyridin-2-ylmethylene)-1-(2-((2-(1-((E)-pyridin-2-ylmethyleneamino)ethyl)phenyl)diselanyl)phenyl)ethanamine (C1), 2,2'(1Z,1'E)-(1,1'-(2,2'-diselanediylbis(2,1-phenylene))bis(ethane-1,1-diyl)) bis(azan-1-yl-1-ylidene)bis -methan-1-yl-1-ylidene)diphenol (C2), and dinaphthyl diselenide (NapSe)2, At concentrations ranging from 1 to 5 μM, no significant DNA damage was observed, as indicated by the absence of a noteworthy increase in the Damage Index (DI). Our results suggest that the organoselenium selenium compounds tested were not genotoxic and cytotoxic to human leukocytes in vitro at lower concentration. This study offers further insights into the genotoxicity profile of these organochalcogens in human leukocytes. Their genotoxicity and cytotoxicity effects at higher concentration are probably mediated through reactive oxygen species generation and their ability to catalyze thiol oxidation.
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Affiliation(s)
- Mohammad Ibrahim
- Department of Chemistry, Abdul Wali Khan University Mardan (AWKUM) KPK, Mardan 23200, Pakistan
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria CEP 97105-900, RS, Brazil
| | - Daiane Francine Meinerz
- Programa de Pós-Graduação em Ciências Biológicas- Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria CEP 97105-900, RS, Brazil
| | - Momin Khan
- Department of Chemistry, Abdul Wali Khan University Mardan (AWKUM) KPK, Mardan 23200, Pakistan
| | - Abid Ali
- Department of Zoology, Abdul Wali Khan University Mardan (AWKUM) KPK, Mardan 23200, Pakistan
| | - Muhammad Idrees Khan
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Abdullah F. AlAsmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Metab Alharbi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdulrahman Alshammari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | | | - Fawaz Alasmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
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2
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Nikulin MV, Drobot VV, Shurubor YI, Švedas VK, Krasnikov BF. Preparative Biocatalytic Synthesis of α-Ketomethylselenobutyrate-A Putative Agent for Cancer Therapy. Molecules 2023; 28:6178. [PMID: 37687007 PMCID: PMC10489025 DOI: 10.3390/molecules28176178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/10/2023] [Accepted: 08/18/2023] [Indexed: 09/10/2023] Open
Abstract
Biomedical studies of the role of organic selenium compounds indicate that the amino acid derivative of L-selenomethionine, α-ketomethylselenobutyrate (KMSB), can be considered a potential anticancer therapeutic agent. It was noted that, in addition to a direct effect on redox signaling molecules, α-ketoacid metabolites of organoselenium compounds are able to change the status of histone acetylation and suppress the activity of histone deacetylases in cancer cells. However, the wide use of KMSB in biomedical research is hindered not only by its commercial unavailability, but also by the fact that there is no detailed information in the literature on possible methods for the synthesis of this compound. This paper describes in detail the procedure for obtaining a high-purity KMSB preparation (purity ≥ 99.3%) with a yield of the target product of more than 67%. L-amino acid oxidase obtained from C. adamanteus was used as a catalyst for the conversion of L-selenomethionine to KMSB. If necessary, this method can be used as a basis both for scaling up the synthesis of KMSB and for developing cost-effective biocatalytic technologies for obtaining other highly purified drugs.
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Affiliation(s)
- Maksim V. Nikulin
- Belozersky Institute of Physicochemical Biology, Lomonosov Moscow State University, Lenin Hills 1, Bldg. 40, Moscow 119991, Russia; (M.V.N.); (V.V.D.)
| | - Viktor V. Drobot
- Belozersky Institute of Physicochemical Biology, Lomonosov Moscow State University, Lenin Hills 1, Bldg. 40, Moscow 119991, Russia; (M.V.N.); (V.V.D.)
| | - Yevgeniya I. Shurubor
- Centre for Strategic Planning of FMBA of the Russian Federation, Pogodinskaya St., Bldg. 10, Moscow 119121, Russia;
| | - Vytas K. Švedas
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Lenin Hills 1, Bldg. 73, Moscow 119991, Russia
| | - Boris F. Krasnikov
- Centre for Strategic Planning of FMBA of the Russian Federation, Pogodinskaya St., Bldg. 10, Moscow 119121, Russia;
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3
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Zhang J, Will Taylor E, Bennett K, Rayman MP. Does atmospheric dimethyldiselenide play a role in reducing COVID-19 mortality? GONDWANA RESEARCH : INTERNATIONAL GEOSCIENCE JOURNAL 2023; 114:87-92. [PMID: 35692874 PMCID: PMC9170275 DOI: 10.1016/j.gr.2022.05.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 05/05/2022] [Accepted: 05/05/2022] [Indexed: 05/11/2023]
Abstract
Environmental selenium (Se) distribution in the US is uneven, yet US residents appear to have a relatively narrow range of serum Se concentrations, according to the NHANES III survey data; this is probably due to the modern food-distribution system. In the US, Se concentration in alfalfa leaves has been used as a proxy for regional Se exposure (low, medium or high, corresponding to ≤ 0.05, 0.06-0.10 and ≥ 0.11 ppm respectively). Se in plants, soil, water, and bacteria can be transformed into volatile dimethyldiselenide, which can be inhaled and excreted via the lung. Hence, pulmonary Se exposure may be different in states with different atmospheric Se levels. We found a significantly higher death rate from COVID-19 in low-Se states than in medium-Se or high-Se states, though the case densities of these states were not significantly different. Because inhaled dimethyldiselenide is a potent inducer of nuclear-factor erythroid 2 p45-related factor 2 (Nrf2), exposure to higher atmospheric dimethyldiselenide may increase Nrf2-dependent antioxidant defences, reducing the activation of NFκB by SARS-CoV-2 in the lung, thereby decreasing cytokine activation and COVID-19 severity. Atmospheric dimethyldiselenide may thereby play a role in COVID-19 mortality, although the extent of its involvement is unclear.
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Affiliation(s)
- Jinsong Zhang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Ethan Will Taylor
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Kate Bennett
- Surrey Clinical Trials Unit and Clinical Research Facility, Department of Clinical and Experimental Medicine, University of Surrey, Guildford, United Kingdom
| | - Margaret P Rayman
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
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4
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Forceville X, Van Antwerpen P, Annane D, Vincent JL. Selenocompounds and Sepsis-Redox Bypass Hypothesis: Part B-Selenocompounds in the Management of Early Sepsis. Antioxid Redox Signal 2022; 37:998-1029. [PMID: 35287478 DOI: 10.1089/ars.2020.8062] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Significance: Endothelial barrier damage, which is in part caused by excess production of reactive oxygen, halogen and nitrogen species (ROHNS), especially peroxynitrite (ONOO-), is a major event in early sepsis and, with leukocyte hyperactivation, part of the generalized dysregulated immune response to infection, which may even become a complex maladaptive state. Selenoenzymes have major antioxidant functions. Their synthesis is related to the need to limit deleterious oxidant redox cycling by small selenocompounds, which may be of therapeutic cytotoxic interest. Plasma selenoprotein-P is crucial for selenium transport from the liver to the tissues and for antioxidant endothelial protection, especially against ONOO-. Above micromolar concentrations, sodium selenite (Na2SeO3) becomes cytotoxic, with a lower cytotoxicity threshold in activated cells, which has led to cancer research. Recent Advances: Plasma selenium (<2% of total body selenium) is mainly contained in selenoprotein-P, and concentrations decrease rapidly in the early phase of sepsis, because of increased selenoprotein-P binding and downregulation of hepatic synthesis and excretion. At low concentrations, Na2SeO3 acts as a selenium donor, favoring selenoprotein-P synthesis in physiology, but probably not in the acute phase of sepsis. Critical Issues: The cytotoxic effects of Na2SeO3 against hyperactivated leukocytes, especially the most immature forms that liberate ROHNS, may be beneficial, but they may also be harmful for activated endothelial cells. Endothelial protection against ROHNS by selenoprotein-P may reduce Na2SeO3 toxicity, which is increased in sepsis. Future Direction: The combination of selenoprotein-P for endothelial protection and the cytotoxic effects of Na2SeO3 against hyperactivated leukocytes may be a promising intervention for early sepsis. Antioxid. Redox Signal. 37, 998-1029.
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Affiliation(s)
- Xavier Forceville
- Medico-surgical Intensive Care Unit, Great Hospital of East Francilien - Meaux site, Meaux, France.,Clinical Investigation Centre (CIC Inserm1414) CHU de Rennes - Université de Rennes 1, Rennes, France
| | - Pierre Van Antwerpen
- Pharmacognosy, Bioanalysis and Drug Discovery and Analytical Platform of the Faculty of Pharmacy, Univesité libre de Bruxelles (ULB), Bruxelles, Belgium
| | - Djillali Annane
- Service de Réanimation Médicale, Hôpital Raymond Poincaré (APHP), Garches, France.,U1173 Lab. of Inflammation & Infection, (Fédération Hospitalo-Universitaire) FHU SEPSIS, Université Paris Saclay-campus (Université de Versailles Saint-Quentin-en-Yvelines) UVSQ, Versailles, France
| | - Jean Louis Vincent
- Department of Intensive Care, Erasme University Hospital, Université libre de Bruxelles, Brussels, Belgium
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Zhang H, Zheng Y, Han D, Lu J, Yin S, Hu H, Zhao C. Combination of Palmitic Acid and Methylseleninic Acid Induces Mitochondria-Dependent Apoptosis via Attenuation of the IRE1α Arm and Enhancement of CHOP in Hepatoma. ACS OMEGA 2021; 6:15708-15715. [PMID: 34179614 PMCID: PMC8223223 DOI: 10.1021/acsomega.1c00959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
The most common saturated fatty acid in the human diet is palmitic acid (PA), and emerging evidence suggests that it may have anticancer activity. Methylseleninic acid (MSeA), the most commonly used selenium derivative in humans, has specific cytotoxic effects on several cancer cells. However, it is generally considered that HepG2 cells are insensitive to MSeA-induced death. In our current research, we found that the addition of PA increased the sensitivity of HepG2 cells to low-dose MSeA-induced apoptosis. The anticancer efficacy of the MSeA/PA combination was also demonstrated in a HepG2 xenograft model. Further experiments revealed that IRE1 inhibition significantly enhanced the PA-induced apoptosis, indicating the prosurvival function of IRE1 in PA treatment of HepG2 cells. The combination of PA and MSeA attenuated the IRE1 pathway and increased the expressions of phospha-eIF2α and GADD153/C/EBP homologous protein (CHOP), contributing to the PA/MSeA combination-induced mitochondria-dependent apoptosis in HepG2 cells. In addition, PA downregulated the expression of the glucose transporter GLUT1 and restricted glucose metabolism, thus promoting the apoptosis of tumor cells. Considering the lipotoxicity of PA, L02 human normal hepatocytes were used to evaluate the effect of MSeA on the lipotoxicity caused by PA. Interestingly, MSeA prevented PA-induced lipotoxicity in L02 cells. Our findings provided evidence that PA may be a promising and excellent sensitizer for improving the anticancer effect of MSeA in hepatoma chemotherapy.
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Affiliation(s)
- Han Zhang
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, College
of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing100080, China
| | - Yongchang Zheng
- Department
of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union
Medical College, Beijing100730, China
| | - Duolima Han
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, College
of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing100080, China
| | - Jizhou Lu
- Department
of Liver Surgery, The Third People’s
Hospital of Gansu Province, Chengguan
District, Lanzhou, Gansu 730030, China
| | - Shutao Yin
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, College
of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing100080, China
| | - Hongbo Hu
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, College
of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing100080, China
| | - Chong Zhao
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, College
of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing100080, China
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6
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Varlamova EG, Turovsky EA. THE MAIN CYTOTOXIC EFFECTS OF METHYLSELENINIC ACID ON VARIOUS CANCER CELLS. Int J Mol Sci 2021; 22:6614. [PMID: 34205571 PMCID: PMC8234898 DOI: 10.3390/ijms22126614] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 12/16/2022] Open
Abstract
Studies of recent decades have repeatedly demonstrated the cytotoxic effect of selenium-containing compounds on cancer cells of various origins. Particular attention in these studies is paid to methylseleninic acid, a widespread selenium-containing compound of organic nature, for several reasons: it has a selective cytotoxic effect on cancer cells, it is cytotoxic in small doses, it is able to generate methylselenol, excluding the action of the enzyme β-lyase. All these qualities make methylseleninic acid an attractive substrate for the production of anticancer drugs on its basis with a well-pronounced selective effect. However, the studies available to date indicate that there is no strictly specific molecular mechanism of its cytotoxic effect in relation to different cancer cell lines and cancer models. This review contains generalized information on the dose- and time-dependent regulation of the toxic effect of methylseleninic acid on the proliferative properties of a number of cancer cell lines. In addition, special attention in this review is paid to the influence of this selenium-containing compound on the regulation of endoplasmic reticulum stress and on the expression of seven selenoproteins, which are localized in the endoplasmic reticulum.
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Affiliation(s)
- Elena G. Varlamova
- Institute of Cell Biophysics of the Russian Academy of Sciences, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Institutskaya St. 3, Pushchino 142290, Moscow Region, Russia;
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7
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Dereven'kov IA, Makarov SV, Brânzanic AM, Silaghi-Dumitrescu R, Molodtsov PA, Pokrovskaya EA. Formation of hydroxyl radical in aqueous solutions containing selenite and glutathione. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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8
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Das D, Sen K. Effect of organo-selenium anticancer drugs on nitrite induced methemoglobinemia: A spectroscopic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 245:118946. [PMID: 32979808 DOI: 10.1016/j.saa.2020.118946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/01/2020] [Accepted: 09/03/2020] [Indexed: 06/11/2023]
Abstract
Selenium containing drugs like selenomethionine, selenocystine, selenourea and methylseleninic acid are reported to exhibit potential anticancer effect. However, these anticancer drugs may exert adverse effects when used over a prolonged period. Little is known about the interaction of these selenium containing drugs with the vital erythroid protein hemoglobin. In this work a comparative study of the interaction of organo-selenium drugs with hemoglobin and heme moiety has been performed using different spectroscopic techniques to find out their role on drug induced methemoglobinemia. We found that though these selenium containing drugs have similar binding affinity towards hemoglobin, they have differential interactions with the heme group. Isothermal calorimetric titration study showed that selenourea has the lowest binding affinity (Kd 19.28 μM) towards HbA as compared to other drugs, selenomethionine, selenocystine and methylseleninic acid (Kd 7.69 μM, 4.88 μM and 10.5 μM at 37 °C respectively). This result is also supported by the molecular docking study. Methylseleninic acid was found to have detrimental effects on nitrite induced methemoglobinemia, a hematological disorder caused due to excessive conversion of Fe2+ to Fe3+ in hemoglobin. Hence the results of the study would help to develop a better insight on the mechanism of action and anticipate the toxicity of these drugs which require further optimization before their actual use in the treatment of cancer.
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Affiliation(s)
- Debashree Das
- Department of Chemistry, University of Calcutta, 92, APC Road, Kolkata 700009, India
| | - Kamalika Sen
- Department of Chemistry, University of Calcutta, 92, APC Road, Kolkata 700009, India.
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9
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Poluboyarinov PA, Elistratov DG, Moiseeva IJ. Antitumor Activity of Selenium and Search Parameters for Its New Potentially Active Derivatives. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020060254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Wang Y, Wang D, Sun LH, Zhang LC, Lu ZS, Xue P, Wang F, Xia QY, Bao SJ. BC@DNA-Mn3(PO4)2 Nanozyme for Real-Time Detection of Superoxide from Living Cells. Anal Chem 2020; 92:15927-15935. [DOI: 10.1021/acs.analchem.0c03322] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ying Wang
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Deng Wang
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Li-Hong Sun
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Long-Cheng Zhang
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Zhi-Song Lu
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Peng Xue
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
| | - Feng Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, P. R. China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, P. R. China
| | - Qing-You Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, P. R. China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, P. R. China
| | - Shu-Juan Bao
- Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, P. R. China
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11
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Zhang J, Saad R, Taylor EW, Rayman MP. Selenium and selenoproteins in viral infection with potential relevance to COVID-19. Redox Biol 2020; 37:101715. [PMID: 32992282 PMCID: PMC7481318 DOI: 10.1016/j.redox.2020.101715] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/03/2020] [Accepted: 09/05/2020] [Indexed: 02/07/2023] Open
Abstract
Selenium is a trace element essential to human health largely because of its incorporation into selenoproteins that have a wide range of protective functions. Selenium has an ongoing history of reducing the incidence and severity of various viral infections; for example, a German study found selenium status to be significantly higher in serum samples from surviving than non-surviving COVID-19 patients. Furthermore, a significant, positive, linear association was found between the cure rate of Chinese patients with COVID-19 and regional selenium status. Moreover, the cure rate continued to rise beyond the selenium intake required to optimise selenoproteins, suggesting that selenoproteins are probably not the whole story. Nonetheless, the significantly reduced expression of a number of selenoproteins, including those involved in controlling ER stress, along with increased expression of IL-6 in SARS-CoV-2 infected cells in culture suggests a potential link between reduced selenoprotein expression and COVID-19-associated inflammation. In this comprehensive review, we describe the history of selenium in viral infections and then go on to assess the potential benefits of adequate and even supra-nutritional selenium status. We discuss the indispensable function of the selenoproteins in coordinating a successful immune response and follow by reviewing cytokine excess, a key mediator of morbidity and mortality in COVID-19, and its relationship to selenium status. We comment on the fact that the synthetic redox-active selenium compound, ebselen, has been found experimentally to be a strong inhibitor of the main SARS-CoV-2 protease that enables viral maturation within the host. That finding suggests that redox-active selenium species formed at high selenium intake might hypothetically inhibit SARS-CoV-2 proteases. We consider the tactics that SARS-CoV-2 could employ to evade an adequate host response by interfering with the human selenoprotein system. Recognition of the myriad mechanisms by which selenium might potentially benefit COVID-19 patients provides a rationale for randomised, controlled trials of selenium supplementation in SARS-CoV-2 infection.
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Affiliation(s)
- Jinsong Zhang
- Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, 130 West Changjiang Road, Hefei, 230036, Anhui, PR China
| | - Ramy Saad
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK; Royal Sussex County Hospital, Brighton, BN2 5BE, UK
| | - Ethan Will Taylor
- Department of Chemistry and Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, USA
| | - Margaret P Rayman
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
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Jose DE, Kanchana US, Mathew TV, Anilkumar G. Recent Developments and Perspectives in the C-Se Cross Coupling Reactions. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200528130131] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
:
The C-Se bond forming reactions are attractive synthetic strategies for biochemists
and synthetic chemists alike for the synthesis of various molecules that are of
biological, pharmaceutical and material interest. Therefore, the design and synthesis of
organoselenium compounds currently constitute engaging fundamental problems in applied
chemistry both in pharmaceutical and academic laboratories. This review discusses
the recent works reported in carbon–selenium cross-coupling reactions with the emphasis
on the mechanistic aspects of the reactions. The reacting species, the addition of ligands,
selection of catalysts, use of suitable solvents, proper setting of reaction time, are
well discussed to understand the detailed mechanism. Various simple, economical and
environmentally friendly protocols are demonstrated, which ensured product stability,
low toxicity, environmentally benign and excellent reactivity for the synthesis of organoselenium compounds.
This review covers the scientific literature from 2010 to 2019.
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Affiliation(s)
- Diana Elizabeth Jose
- Department of Chemistry, St. Thomas College Pala, Arunapuram P.O., Kottayam, Kerala, 686574, India
| | - U. S. Kanchana
- Department of Chemistry, St. Thomas College Pala, Arunapuram P.O., Kottayam, Kerala, 686574, India
| | - Thomas V. Mathew
- Department of Chemistry, St. Thomas College Pala, Arunapuram P.O., Kottayam, Kerala, 686574, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, P.D. Hills PO, Kottayam, Kerala, 686560, India
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13
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Novel Antimicrobial Coating on Silicone Contact Lens Using Glycidyl Methacrylate and Polyethyleneimine Based Polymers. Macromol Rapid Commun 2020; 41:e2000175. [DOI: 10.1002/marc.202000175] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/12/2020] [Indexed: 12/19/2022]
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14
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Goltyaev MV, Mal'tseva VN, Varlamova EG. Expression of ER-resident selenoproteins and activation of cancer cells apoptosis mechanisms under ER-stress conditions caused by methylseleninic acid. Gene 2020; 755:144884. [PMID: 32562739 DOI: 10.1016/j.gene.2020.144884] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 05/10/2020] [Accepted: 06/08/2020] [Indexed: 01/21/2023]
Abstract
The aim of this work was to study changes in gene expression levels of 7 ER-resident selenoproteins under ER-stress caused by the action of a selenium-containing compound of organic nature, methylselenic acid using three human cancer cell lines DU 145 (prostate carcinoma), MCF 7 (breast adenocarcinoma)and HT-1080 (fibrosarcoma). According to the obtained results, we can speak of a synchronous changes in the expression of SELT and SEP15 mRNA depending on the concentration of MSA for 24 h, while the pattern of SELM expression was completely opposite and was radically different from other selenoproteins. It should be noted that in HT-1080 cells, the expression pattern of SELM differed from the expression pattern in two other cancer cells, while the expression patterns of other ER-resident selenoproteins (SELT, SEP15, SELK, SELS, SELN and DIO2) differed slightly depending on the cell line. Also we investigated the molecular mechanisms of UPR caused by MSA-induced ER stress in three cancer cell lines. According to the obtained results, it can be assumed that in DU 145 cells, MSA promotes activation of the PERK signaling pathway of UPR. In fibrosarcoma cells MSA was promoted the activation of ATF-6 UPR signaling pathway. In MCF 7 cells, MSA promoted the activation of two pro-apoptotic UPR signaling pathways at once: IRE1 and ATF-6.The results of this work once again demonstrate that the mechanisms of ER-stress regulation caused by the same agent, in this case, MSA, lead to the activation of different UPR signaling pathways in different cancer cells, and about their relationship.
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Affiliation(s)
- M V Goltyaev
- Federal State Institution of Science Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya st. 3, 142290 Pushchino, Moscow Region, Russia
| | - V N Mal'tseva
- Federal State Institution of Science Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya st. 3, 142290 Pushchino, Moscow Region, Russia
| | - E G Varlamova
- Federal State Institution of Science Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya st. 3, 142290 Pushchino, Moscow Region, Russia.
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15
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Varlamova EG, Maltseva VN. Micronutrient Selenium: Uniqueness and Vital Functions. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919040213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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16
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Gerhart AK, Janz DM. Toxicity of Aqueous L-Selenomethionine and Tert-Butyl Hydroperoxide Exposure to Zebrafish ( Danio rerio) Embryos Following Tert-Butyl Hydroquinone Treatment. TOXICS 2019; 7:toxics7030044. [PMID: 31470549 PMCID: PMC6789818 DOI: 10.3390/toxics7030044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/22/2019] [Accepted: 08/27/2019] [Indexed: 11/16/2022]
Abstract
Aqueous L-selenomethionine (SeMet) embryo exposures represent a rapid and simplified method for investigating the embryotoxic effects of SeMet. Using zebrafish (Danio rerio) as a model organism, the objective of the present study was to characterize the effects of waterborne exposure to both SeMet and tert-butyl hydroperoxide (tBOOH) to early life stages of zebrafish pre-treated with the antioxidant tert-butyl hydroquinone (tBHQ) in an attempt to investigate the mechanism of Se toxicity as it relates to oxidative stress. During the initial concentration range finding experiment, recently fertilized embryos were exposed for five days to 5, 25, 125, and 625 µg Se/L (as SeMet). These exposures informed the second experiment in which embryos were exposed to two concentrations of SeMet (25 and 125 µg Se/L) and 75 mg/L tBOOH either with (tBOOH-t, 25-t, 125-t) or without (tBOOH, 25, 125) a 4 h 100 µg/L tBHQ pre-treatment. Survival, hatchability, time to hatch, the frequency and severity of deformities (total and type), and changes in the expression of seven antioxidant-associated genes were determined. Exposures to SeMet and tBOOH reduced hatchability, increased time to hatch, decreased survival, increased the incidence and severity of deformities, and increased glutathione-disulfide reductase (gsr) expression in the pre-treated tBOOH treatment group.
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Affiliation(s)
- Allyson K Gerhart
- Toxicology Graduate Program, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada.
| | - David M Janz
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
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17
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Zou Z, Ma XQ, Zou L, Shi ZZ, Sun QQ, Liu Q, Liang TT, Li CM. Tailoring pore structures with optimal mesopores to remarkably promote DNA adsorption guiding the growth of active Mn 3(PO 4) 2 toward sensitive superoxide biomimetic enzyme sensors. NANOSCALE 2019; 11:2624-2630. [PMID: 30693354 DOI: 10.1039/c8nr08829b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The great challenge in preparing a biomimetic enzyme sensor is to have sensitivity and selectivity equal to or better than its corresponding biological sensor. Porous electrodes possess a large surface area and are often used to greatly improve the sensor sensitivity. However, how to tailor the pore structure, especially the pore size distribution to further improve the sensitivity and selectivity of a biomimetic sensor, has not been investigated yet. The superoxide anion (O2˙-) plays essential roles in various biological processes and is of importance in clinical diagnosis and life science research. It is generally detected by the superoxide dismutase enzyme. Herein, we delicately tailor the pore structure of carbon nanofibers (CNFs) by pyrolysis to obtain an optimal mesopore structure for strong adsorption of DNA, followed by guiding the growth of Mn3(PO4)2 as a biomimetic enzyme toward highly sensitive detection of O2˙-. The Mn3(PO4)2-DNA/CNF sensor achieves the best sensitivity among the reported O2˙- sensors while possessing good selectivity. The enhancement mechanism is also investigated, indicating that the mesopore ratio of CNFs plays an essential role in the high sensitivity and selectivity due to their strong adsorption of DNA for guiding the growth of a large amount of uniform sensing components, Mn3(PO4)2, toward high sensitivity and selectivity. The biomimetic sensor was further used to in situ monitor O2˙- released from human keratinocyte cells and human malignant melanoma cells under drug stimulation, showing high sensitivity to real-time quantitative detection of O2˙-. This work provides a highly sensitive in situ real-time biomimetic O2˙- sensor for applications in biological research and diagnosis, while shedding light on the enhancement mechanism of the pore structure, especially the pore size distribution of a porous electrode for high performance sensing processes.
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Affiliation(s)
- Zhuo Zou
- Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, P.R. China.
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18
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Lafin JT, Sarsour EH, Kalen AL, Wagner BA, Buettner GR, Goswami PC. Methylseleninic Acid Induces Lipid Peroxidation and Radiation Sensitivity in Head and Neck Cancer Cells. Int J Mol Sci 2019; 20:ijms20010225. [PMID: 30626124 PMCID: PMC6337472 DOI: 10.3390/ijms20010225] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/17/2018] [Accepted: 01/04/2019] [Indexed: 12/20/2022] Open
Abstract
Combination radiation and chemotherapy are commonly used to treat locoregionally advanced head and neck squamous cell carcinoma (HNSCC). Aggressive dosing of these therapies is significantly hampered by side effects due to normal tissue toxicity. Selenium represents an adjuvant that selectively sensitizes cancer cells to these treatments modalities, potentially by inducing lipid peroxidation (LPO). This study investigated whether one such selenium compound, methylseleninic acid (MSA), induces LPO and radiation sensitivity in HNSCC cells. Results from 4,4-difluoro-4-bora-3a,4a-diaza-S-indacene (BODIPY) C11 oxidation and ferric thiocyanate assays revealed that MSA induced LPO in cells rapidly and persistently. Propidium iodide (PI) exclusion assay found that MSA was more toxic to cancer cells than other related selenium compounds; this toxicity was abrogated by treatment with α-tocopherol, an LPO inhibitor. MSA exhibited no toxicity to normal fibroblasts at similar doses. MSA also sensitized HNSCC cells to radiation as determined by clonogenic assay. Intracellular glutathione in cancer cells was depleted following MSA treatment, and supplementation of the intracellular glutathione pool with N-acetylcysteine sensitized cells to MSA. The addition of MSA to a cell-free solution of glutathione resulted in an increase in oxygen consumption, which was abrogated by catalase, suggesting the formation of H2O2. Results from this study identify MSA as an inducer of LPO, and reveal its capability to sensitize HNSCC to radiation. MSA may represent a potent adjuvant to radiation therapy in HNSCC.
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Affiliation(s)
- John T Lafin
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA.
| | - Ehab H Sarsour
- The University of Iowa Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA.
| | - Amanda L Kalen
- The University of Iowa Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA.
| | - Brett A Wagner
- The University of Iowa Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA.
| | - Garry R Buettner
- The University of Iowa Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA.
| | - Prabhat C Goswami
- The University of Iowa Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA.
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Finger JW, Hamilton MT, Kelley MD, Zhang Y, Kavazis AN, Glenn TC, Tuberville TD. Dietary Selenomethionine Administration and Its Effects on the American Alligator (Alligator mississippiensis): Oxidative Status and Corticosterone Levels. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 75:37-44. [PMID: 29737374 DOI: 10.1007/s00244-018-0530-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
Selenium (Se) is an essential nutrient which in excess causes toxicity. The disposal of incompletely combusted coal, which often is rich in Se, into aquatic settling basins is increasing the risk of Se exposure worldwide. However, very few studies have looked at the physiological effects of Se exposure on long-lived, top trophic vertebrates, such as the American alligator (Alligator mississippiensis). During a 7-week period, alligators were fed one of three dietary treatments: mice injected with deionized water or mice injected with water containing 1000 or 2000 ppm selenomethionine (SeMet). One week after the last feeding alligators were bled within 3 min of capture for plasma corticosterone (CORT). A few days later, all alligators were euthanized and whole blood and tail tissue were harvested to measure oxidative damage, an antioxidant-associated transcription factor, and antioxidant enzymes [glutathione peroxidase-1 (GPX1), superoxide dismutase-1 (SOD1), and SOD2] by Western blotting. There was a dose-dependent increase in baseline CORT levels in alligators administered SeMet. Except for blood SOD2 levels, SeMet treatment had no effect (p > 0.05 for all) on oxidative status: oxidative damage, GPX1, SOD1, and muscle SOD2 levels were similar among treatments. Our results illustrate that high levels of Se may act as a stressor to crocodilians. Future studies should investigate further the physiological effects of Se accumulation in long-lived, top-trophic vertebrates.
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Affiliation(s)
- John W Finger
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA.
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA.
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - Matthew T Hamilton
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
| | - Meghan D Kelley
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Yufeng Zhang
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | | | - Travis C Glenn
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA
| | - Tracey D Tuberville
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
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20
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Nair MS, Upadhyay A, Fancher S, Upadhyaya I, Dey S, Kollanoor-Johny A, Zhao J, Venkitanarayanan K. Inhibition and Inactivation of Escherichia coli O157:H7 Biofilms by Selenium. J Food Prot 2018; 81:926-933. [PMID: 29745757 DOI: 10.4315/0362-028x.jfp-17-427] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The present study investigated the efficacy of selenium (Se) in reduction of enterohemorrhagic Escherichia coli (EHEC) exopolysaccharide (EPS) synthesis, inhibition of biofilm formation at 25 and 4°C on polystyrene surface, and inactivation of mature EHEC biofilms in combination with hot water. Sterile 96-well polystyrene plates inoculated with EHEC (∼6.0 log CFU per well) were treated with a subinhibitory concentration (SIC) of Se, and biofilms were allowed to mature at 4 and 25°C for 96 h. Biofilm-associated bacterial population was determined by scraping and plating, whereas the extent of EPS production was determined using ruthenium red staining assay. Solid surface assay was used to study the effect of Se on early attachment of EHEC cells to polystyrene. The efficacy of Se in rapid inactivation of preformed, mature EHEC biofilm was investigated by treating biofilms on polystyrene plates with the MBC of Se in combination with hot water at 80°C with a contact time of 0 min, 30 s, 2 min, and 5 min. Furthermore, the effect of Se on EHEC biofilm architecture was visualized using confocal microscopy, whereas the effect of Se on EHEC biofilm genes was determined using real-time quantitative PCR (RT-qPCR). Finally, the potential feasibility of coating stainless steel surfaces with Se nanoparticles to inhibit EHEC biofilm formation was studied. Se reduced early attachment of planktonic cells, biofilm formation, and EPS synthesis in EHEC ( P < 0.05). Se in combination with hot water reduced biofilm-associated bacterial counts by 3 to 4 log CFU/mL at 5 min of exposure compared with the control ( P < 0.05). However, hot water treatment alone decreased biofilm-associated bacterial counts by only 1.0 log CFU/mL. RT-qPCR results revealed that Se down-regulated the transcription of critical genes associated with biofilm synthesis in EHEC ( P < 0.05). The results collectively suggest that Se could potentially be used to control EHEC biofilms in food processing environments, but appropriate applications need to be validated.
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Affiliation(s)
- Meera Surendran Nair
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Abhinav Upadhyay
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Samantha Fancher
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Indu Upadhyaya
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Swayandipta Dey
- 2 Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Anup Kollanoor-Johny
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Jing Zhao
- 2 Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Kumar Venkitanarayanan
- 1 Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
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21
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Xiao A, Dhand C, Leung CM, Beuerman RW, Ramakrishna S, Lakshminarayanan R. Strategies to design antimicrobial contact lenses and contact lens cases. J Mater Chem B 2018; 6:2171-2186. [PMID: 32254560 DOI: 10.1039/c7tb03136j] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Contact lens wear is a primary risk factor for developing ocular complications, such as contact lens acute red eye (CLARE), contact lens-induced peripheral ulcer (CLPU) and microbial keratitis (MK). Infections occur due to microbial contamination of contact lenses, lens cases and lens care solution, which are exacerbated by extended lens wear and unsanitary lens care practices. The development of microbial biofilms inside lens cases is an additional complication, as the developed biofilms are resistant to conventional lens cleaning solutions. Ocular infections, particularly in the case of MK, can lead to visual impairment or even blindness, so there is a pressing need for the development of antimicrobial contact lenses and cases. Additionally, with the increasing use of bandage contact lenses and contact lenses as drug depots and with the development of smart contact lenses, contact lens hygiene becomes a therapeutically important issue. In this review, we attempt to compile and summarize various chemical strategies for developing antimicrobial contact lenses and lens cases by using silver, free-radical producing agents, antimicrobial peptides or by employing passive surface modification approaches. We also evaluated the advantages and disadvantages of each system and tried to provide input to future directions. Finally, we summarize the developing technologies of therapeutic contact lenses to shed light on the future of contact lens applications.
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Affiliation(s)
- Amy Xiao
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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22
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Hu Y, Ma J, Li L, Hu Q, Lv S, Liu B, Wang S. Fused multifunctionalized dibenzoselenophenes from tetraynes. Chem Commun (Camb) 2018; 53:1542-1545. [PMID: 28094359 DOI: 10.1039/c6cc09732d] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The facile synthesis of fused multifunctionalized dibenzoselenophenes by a one-pot-three-step cascade hexadehydro-Diels-Alder reaction of tetraynes is reported. The overall transformation involves the formation of four new C-C bonds and one new Caryl-Se bond and C-H activation via both intramolecular cyclization and intermolecular free radical reactions.
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Affiliation(s)
- Yimin Hu
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Jie Ma
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Lidong Li
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Qiong Hu
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Shuang Lv
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Baohua Liu
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
| | - Shaowu Wang
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
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23
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Brandt JE, Bernhardt ES, Dwyer GS, Di Giulio RT. Selenium Ecotoxicology in Freshwater Lakes Receiving Coal Combustion Residual Effluents: A North Carolina Example. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2418-2426. [PMID: 28165723 PMCID: PMC6388687 DOI: 10.1021/acs.est.6b05353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Anthropogenic activities resulting in releases of selenium-laden waste streams threaten freshwater ecosystems. Lake ecosystems demand special consideration because they are characterized by prolonged retention of selenium and continuous cycling of the element through the food chain, through which it becomes available to toxicologically susceptible egg-laying vertebrates. This study documents the current selenium burden of lakes in North Carolina (NC) with historic selenium inputs from nearby coal-fired power plants. We measured selenium concentrations in surface waters, sediment pore waters, and resident fish species from coal combustion residual (CCR)-impacted lakes and paired reference lakes. The data are related to levels of recent selenium inputs and analyzed in the context of recently updated federal criteria for the protection of aquatic life. We show that the Se content of fish from lakes with the highest selenium inputs regularly exceed these criteria and are comparable to those measured during historic fish extirpation events in the United States. Large legacy depositions of CCRs within reservoir sediments are likely to sustain Se toxicity for many years despite recent laws to limit CCR discharge into surface waters in NC. Importantly, the widespread use of high-selenium coals for electricity generation extends the potential risk for aquatic ecosystem impacts beyond U.S. borders.
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Affiliation(s)
- Jessica E. Brandt
- Environmental Sciences & Policy Division, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
- Corresponding Author: Phone: (919) 613-8059; fax: (919) 668-1799;
| | - Emily S. Bernhardt
- Department of Biology, Duke University, Durham, North Carolina 27708, United States
| | - Gary S. Dwyer
- Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Richard T. Di Giulio
- Environmental Sciences & Policy Division, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
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Shigemi Z, Manabe K, Hara N, Baba Y, Hosokawa K, Kagawa H, Watanabe T, Fujimuro M. Methylseleninic acid and sodium selenite induce severe ER stress and subsequent apoptosis through UPR activation in PEL cells. Chem Biol Interact 2017; 266:28-37. [PMID: 28161410 DOI: 10.1016/j.cbi.2017.01.027] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/26/2016] [Accepted: 01/30/2017] [Indexed: 11/15/2022]
Abstract
Selenium compounds such as methylseleninic acid (MSA) and sodium selenite (SS) have been widely evaluated as potential anti-cancer agents in the clinical setting. Primary effusion lymphoma (PEL) is a non-Hodgkin's B-cell lymphoma, associated with immunosuppressed individuals, such as post-transplant or AIDS patients. Kaposi's sarcoma-associated herpesvirus (KSHV) is the causative agent of PEL and Kaposi's sarcoma. Here, we found that MSA and SS markedly inhibited the growth of PEL cells compared with KSHV-uninfected B cells. MSA and SS caused ER stress, inducing the unfolded protein response (UPR) pathway in PEL cells that resulted in pro-apoptotic UPR, and finally apoptosis. The expression of UPR-related molecules (GRP78 and GADD34) and pro-apoptotic UPR molecules (CHOP, Bim, or Puma) were augmented in PEL cells treated with MSA or SS. In addition, these compounds induced the activation of caspase-4, an ER stress specific caspase, as well as caspase-3,-7, and -9 in PEL cells. We confirmed that thapsigargin which is an inducer of ER stress, dramatically decreased the viability of PEL cells, compared with KSHV-uninfected Ramos cells. We also investigated whether MSA or SS caused oxidization of cellular proteins in PEL cells. MSA and SS increased the levels of oxidative proteins in PEL cells, and the anti-oxidant agent (N-acetyl-l-cysteine) restored cell viability and suppressed caspase-7 activation in PEL cells treated with MSA or SS. Finally, we confirmed that MSA and SS induced neither lytic replication nor viral production in PEL cells. Taken together, MSA and SS could serve as lead compounds for the development of novel and effective drugs against PEL without the risk of de novo KSHV production.
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Affiliation(s)
- Zenpei Shigemi
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Kazuki Manabe
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Naoko Hara
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Yusuke Baba
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Kohei Hosokawa
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Hiroki Kagawa
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Tadashi Watanabe
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan
| | - Masahiro Fujimuro
- Department of Cell Biology, Kyoto Pharmaceutical University, Misasagi-Shichonocho 1, Yamashinaku, Kyoto 607-8412, Japan.
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25
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Jiang M, Yang H, Fu H. Visible-Light Photoredox Synthesis of Chiral α-Selenoamino Acids. Org Lett 2016; 18:1968-71. [DOI: 10.1021/acs.orglett.6b00489] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Min Jiang
- Key Laboratory
of Bioorganic
Phosphorus Chemistry and Chemical Biology (Ministry of Education),
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Haijun Yang
- Key Laboratory
of Bioorganic
Phosphorus Chemistry and Chemical Biology (Ministry of Education),
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Hua Fu
- Key Laboratory
of Bioorganic
Phosphorus Chemistry and Chemical Biology (Ministry of Education),
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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26
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Tie M, Li B, Zhuang X, Han J, Liu L, Hu Y, Li H. Selenium speciation in soybean by high performance liquid chromatography coupled to electrospray ionization–tandem mass spectrometry (HPLC–ESI–MS/MS). Microchem J 2015. [DOI: 10.1016/j.microc.2015.05.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Misra S, Boylan M, Selvam A, Spallholz JE, Björnstedt M. Redox-active selenium compounds--from toxicity and cell death to cancer treatment. Nutrients 2015; 7:3536-56. [PMID: 25984742 PMCID: PMC4446766 DOI: 10.3390/nu7053536] [Citation(s) in RCA: 193] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 04/24/2015] [Accepted: 05/05/2015] [Indexed: 11/29/2022] Open
Abstract
Selenium is generally known as an antioxidant due to its presence in selenoproteins as selenocysteine, but it is also toxic. The toxic effects of selenium are, however, strictly concentration and chemical species dependent. One class of selenium compounds is a potent inhibitor of cell growth with remarkable tumor specificity. These redox active compounds are pro-oxidative and highly cytotoxic to tumor cells and are promising candidates to be used in chemotherapy against cancer. Herein we elaborate upon the major forms of dietary selenium compounds, their metabolic pathways, and their antioxidant and pro-oxidant potentials with emphasis on cytotoxic mechanisms. Relative cytotoxicity of inorganic selenite and organic selenocystine compounds to different cancer cells are presented as evidence to our perspective. Furthermore, new novel classes of selenium compounds specifically designed to target tumor cells are presented and the potential of selenium in modern oncology is extensively discussed.
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Affiliation(s)
- Sougat Misra
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
| | - Mallory Boylan
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, P.O. Box 41270, Lubbock, TX 79409-1270, USA.
| | - Arun Selvam
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
| | - Julian E Spallholz
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, P.O. Box 41270, Lubbock, TX 79409-1270, USA.
| | - Mikael Björnstedt
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
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Khan MI, Giridhar P. Enhanced chemical stability, chromatic properties and regeneration of betalains in Rivina humilis L. berry juice. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.03.027] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hagemann-Jensen M, Uhlenbrock F, Kehlet S, Andresen L, Gabel-Jensen C, Ellgaard L, Gammelgaard B, Skov S. The selenium metabolite methylselenol regulates the expression of ligands that trigger immune activation through the lymphocyte receptor NKG2D. J Biol Chem 2014; 289:31576-90. [PMID: 25258323 DOI: 10.1074/jbc.m114.591537] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
For decades, selenium research has been focused on the identification of active metabolites, which are crucial for selenium chemoprevention of cancer. In this context, the metabolite methylselenol (CH3SeH) is known for its action to selectively kill transformed cells through mechanisms that include increased formation of reactive oxygen species, induction of DNA damage, triggering of apoptosis, and inhibition of angiogenesis. Here we reveal that CH3SeH modulates the cell surface expression of NKG2D ligands. The expression of NKG2D ligands is induced by stress-associated pathways that occur early during malignant transformation and enable the recognition and elimination of tumors by activating the lymphocyte receptor NKG2D. CH3SeH regulated NKG2D ligands both on the transcriptional and the posttranscriptional levels. CH3SeH induced the transcription of MHC class I polypeptide-related sequence MICA/B and ULBP2 mRNA. However, the induction of cell surface expression was restricted to the ligands MICA/B. Remarkably, our studies showed that CH3SeH inhibited ULBP2 surface transport through inhibition of the autophagic transport pathway. Finally, we identified extracellular calcium as being essential for CH3SeH regulation of NKG2D ligands. A balanced cell surface expression of NKG2D ligands is considered to be an innate barrier against tumor development. Therefore, our work indicates that the application of selenium compounds that are metabolized to CH3SeH could improve NKG2D-based immune therapy.
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Affiliation(s)
| | | | - Stephanie Kehlet
- From the Laboratory of Immunology, Department of Veterinary Disease Biology
| | - Lars Andresen
- From the Laboratory of Immunology, Department of Veterinary Disease Biology
| | | | - Lars Ellgaard
- Department of Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Copenhagen, Denmark
| | | | - Søren Skov
- From the Laboratory of Immunology, Department of Veterinary Disease Biology,
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Zhang L, Wang Y, Zhou Y, Zheng L, Zhan X, Pu Q. Different sources of maternal selenium affect selenium retention, antioxidant status, and meat quality of 56-day-old offspring of broiler breeders. Poult Sci 2014; 93:2210-9. [DOI: 10.3382/ps.2013-03605] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Wang Q, Webster TJ. Nanostructured Selenium – A Novel Biologically‐Inspired Material for Antibacterial Medical Device Applications. Biomimetics (Basel) 2013. [DOI: 10.1002/9781118810408.ch8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Weekley CM, Aitken JB, Finney L, Vogt S, Witting PK, Harris HH. Selenium metabolism in cancer cells: the combined application of XAS and XFM techniques to the problem of selenium speciation in biological systems. Nutrients 2013; 5:1734-56. [PMID: 23698165 PMCID: PMC3708347 DOI: 10.3390/nu5051734] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/02/2013] [Accepted: 05/06/2013] [Indexed: 01/23/2023] Open
Abstract
Determining the speciation of selenium in vivo is crucial to understanding the biological activity of this essential element, which is a popular dietary supplement due to its anti-cancer properties. Hyphenated techniques that combine separation and detection methods are traditionally and effectively used in selenium speciation analysis, but require extensive sample preparation that may affect speciation. Synchrotron-based X-ray absorption and fluorescence techniques offer an alternative approach to selenium speciation analysis that requires minimal sample preparation. We present a brief summary of some key HPLC-ICP-MS and ESI-MS/MS studies of the speciation of selenium in cells and rat tissues. We review the results of a top-down approach to selenium speciation in human lung cancer cells that aims to link the speciation and distribution of selenium to its biological activity using a combination of X-ray absorption spectroscopy (XAS) and X-ray fluorescence microscopy (XFM). The results of this approach highlight the distinct fates of selenomethionine, methylselenocysteine and selenite in terms of their speciation and distribution within cells: organic selenium metabolites were widely distributed throughout the cells, whereas inorganic selenium metabolites were compartmentalized and associated with copper. New data from the XFM mapping of electrophoretically-separated cell lysates show the distribution of selenium in the proteins of selenomethionine-treated cells. Future applications of this top-down approach are discussed.
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Affiliation(s)
- Claire M. Weekley
- School of Chemistry and Physics, The University of Adelaide, Adelaide, SA 5005, Australia; E-Mail:
| | - Jade B. Aitken
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia; E-Mail:
| | - Lydia Finney
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA; E-Mails: (L.F.); (S.V.)
- Biosciences Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Stefan Vogt
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA; E-Mails: (L.F.); (S.V.)
| | - Paul K. Witting
- The Discipline of Pathology, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia; E-Mail:
| | - Hugh H. Harris
- School of Chemistry and Physics, The University of Adelaide, Adelaide, SA 5005, Australia; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +61-08-8313-5060; Fax: +61-08-8313-4358
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Weekley CM, Harris HH. Which form is that? The importance of selenium speciation and metabolism in the prevention and treatment of disease. Chem Soc Rev 2013; 42:8870-94. [DOI: 10.1039/c3cs60272a] [Citation(s) in RCA: 371] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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36
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Biofortified, selenium enriched, fruit and cladode from three Opuntia Cactus pear cultivars grown on agricultural drainage sediment for use in nutraceutical foods. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.04.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wang Q, Webster TJ. Nanostructured selenium for preventing biofilm formation on polycarbonate medical devices. J Biomed Mater Res A 2012; 100:3205-10. [PMID: 22707390 DOI: 10.1002/jbm.a.34262] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/04/2012] [Accepted: 05/07/2012] [Indexed: 11/11/2022]
Abstract
Biofilms are a common cause of persistent infections on medical devices as they are easy to form and hard to treat. The objective of this study was for the first time to coat selenium (a natural element in the body) nanoparticles on the surface of polycarbonate medical devices (such as those used for medical catheters) and to examine their effectiveness at preventing biofilm formation. The size and distribution of selenium coatings were characterized using scanning electron microscopy and atomic force microscopy. The strength of the selenium coating on polycarbonate was assessed by tape-adhesion tests followed by atomic absorption spectroscopy. Results showed that selenium nanoparticles had a diameter of 50-100 nm and were well distributed on the polycarbonate surface. In addition, more than 50% of the selenium coating survived the tape-adhesion test as larger nanoparticles had less adhesion strength to the underlying polycarbonate substrate than smaller selenium nanoparticles. Most significantly, the results of this in vitro study showed that the selenium coatings on polycarbonate significantly inhibited Staphylococcus aureus growth to 8.9% and 27% when compared with an uncoated polycarbonate surface after 24 and 72 h, respectively. Importantly, this was accomplished without using antibiotics but rather with an element (selenium) that is natural to the human body. Thus, this study suggests that coating polymers (particularly, polycarbonate) with nanostructured selenium is a fast and effective way to reduce bacteria functions that lead to medical device infections. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 100A: 3205-3210, 2012.
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Affiliation(s)
- Qi Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02906, USA
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Wang D, Taylor EW, Wang Y, Wan X, Zhang J. Encapsulated nanoepigallocatechin-3-gallate and elemental selenium nanoparticles as paradigms for nanochemoprevention. Int J Nanomedicine 2012; 7:1711-21. [PMID: 22619522 PMCID: PMC3356175 DOI: 10.2147/ijn.s29341] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Chemoprevention that impedes one or more steps in carcinogenesis, via long-term administration of naturally occurring or synthetic compounds, is widely considered to be a crucial strategy for cancer control. Selenium (Se) has chemopreventive effects, but its application is limited due to a low therapeutic index as shown in numerous animal experiments. In contrast to Se, which was known for its toxicity prior to the discovery of its beneficial effects, the natural compound epigallocatechin-3-gallate (EGCG) was originally considered to be nontoxic. Due to its preventive effects on many types of cancer in various animal models, EGCG has been regarded as a prime example of a promising chemopreventive agent without major toxicity concerns. However, very recently, evidence has accumulated showing that efficacious doses of EGCG used in health promotion may not be far from its toxic dose level. Therefore, both Se and EGCG need to be modified by novel pharmaceutical technologies to attain enhanced efficacy and/or reduced toxicity. Nanotechnology may be one of these technologies. In support of this hypothesis, the characteristics of polylactic acid and polyethylene glycol-encapsulated nano-EGCG and elemental Se nanoparticles dispersed by bovine serum albumin are reviewed in this article. Encapsulation of EGCG to form nano-EGCG leads to its enhanced stability in plasma and remarkably superior chemopreventive effects, with more than tenfold dose advantages in inducing apoptosis and inhibition of both angiogenesis and tumor growth. Se at nanoparticle size (“Nano-Se”), compared with Se compounds commonly used in dietary supplements, has significantly lower toxicity, without compromising its ability to upregulate selenoenzymes at nutritional levels and induce phase II enzymes at supranutritional levels.
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Affiliation(s)
- Dongxu Wang
- Key Laboratory of Tea Biochemistry and Biotechnology, School of Tea and Food Science, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
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Lavado R, Shi D, Schlenk D. Effects of salinity on the toxicity and biotransformation of L-selenomethionine in Japanese medaka (Oryzias latipes) embryos: mechanisms of oxidative stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2012; 108:18-22. [PMID: 22265608 DOI: 10.1016/j.aquatox.2011.07.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Accepted: 07/02/2011] [Indexed: 05/31/2023]
Abstract
Previous studies in mammals have shown that organoselenium depletes the cellular antioxidant, glutathione (GSH) due to activation of organoselenides to organoselenoxides by flavin-containing monooxygenases (FMO). Since FMO tends to be induced in euryhaline fish exposed to hypersaline conditions, the developmental toxicity of salinity and organoselenium was examined in the euryhaline fish Japanese medaka (Oryzias latipes). FMO activity, GSH, and selenium concentrations in Japanese medaka embryos were measured following a 24-h exposure to 0.05 mM L-selenomethionine (SeMet) under different saline conditions: freshwater (<0.5 dS/m), 4.2, 6.7, and 16.8 dS/m. Concentrations of GSH and the hatch-out ratio of the SeMet-treated embryos decreased in a salinity dependent manner. While SeMet treatment led to accumulation within embryos, selenium concentrations were unaltered by salinity treatment. Compared to freshwater-exposed embryos, microsomes from embryos at 6.7 and 16.8 dS/m had enhanced oxidation of SeMet to the selenoxide (10- and 14.3-fold, respectively), which correlated with GSH depletion. The results show that increased SeMet oxidation by hypersaline conditions with subsequent GSH depletion may play an important role in the developmental toxicity of selenomethionine.
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Affiliation(s)
- Ramon Lavado
- Department of Environmental Sciences, University of California, Riverside, CA 92521, USA.
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Weekley CM, Aitken JB, Musgrave IF, Harris HH. Methylselenocysteine treatment leads to diselenide formation in human cancer cells: evidence from X-ray absorption spectroscopy studies. Biochemistry 2012; 51:736-8. [PMID: 22242710 DOI: 10.1021/bi201462u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The selenoamino acids methylselenocysteine (MeSeCys) and selenomethionine (SeMet) have disparate efficacies as anticancer agents. Herein, we use X-ray absorption spectroscopy to determine the chemical form of selenium in human neuroblastoma cells. Cells treated with MeSeCys contain a significant diselenide component, which is absent from SeMet-treated cells and suggests that metabolites of MeSeCys are capable of altering the redox status of the cells. The differences in the speciation of Se in the selenoamino acid-treated cells may provide insight into the differing anticancer activities of MeSeCys and SeMet.
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Affiliation(s)
- Claire M Weekley
- School of Chemistry and Physics, The University of Adelaide, SA 5005, Australia
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Tran P, Webster T. Nanostructured selenium anti-cancer coatings for orthopedic applications. Nanomedicine (Lond) 2012. [DOI: 10.1533/9780857096449.2.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ibáñez E, Stoedter M, Hofmann PJ, Plano D, Calvo A, Nguewa PA, Palop JA, Sanmartín C, Schomburg L. Structure- and cell-specific effects of imidoselenocarbamates on selenoprotein expression and activity in liver cells in culture. Metallomics 2012; 4:1297-307. [DOI: 10.1039/c2mt20096a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zhang S, Luo Y, Zeng H, Wang Q, Tian F, Song J, Cheng WH. Encapsulation of selenium in chitosan nanoparticles improves selenium availability and protects cells from selenium-induced DNA damage response. J Nutr Biochem 2011; 22:1137-42. [DOI: 10.1016/j.jnutbio.2010.09.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Revised: 09/01/2010] [Accepted: 09/23/2010] [Indexed: 10/18/2022]
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Abstract
SUMMARYPlasmodium falciparum has for some time been developing resistance against known anti-malarial drugs, and therefore a new drug is urgently needed. Selenium (Se), an essential trace element, in the form of inorganic Se, selenite (SeO32−), has been reported to have an anti-plasmodial effect, but its mechanism is still unclear. In the present study, we evaluated the anti-plasmodial effect of several Se compounds against P. falciparum in vitro. The anti-plasmodial effect of several Se compounds was analysed and their apoptosis-inducing activity was evaluated by morphological observation, DNA fragmentation assay and mitochondrial function analysis. SeO32−, methylseleninic acid, selenomethionine and selenocystine have anti-plasmodial effects with 50% inhibition concentration at 9, 10, 45, and 65 μm, respectively, while selenate and methylselenocysteine up to 100 μm have no effect on parasite growth. The effective Se compounds caused the parasites to become shrunken and pyknotic and significantly increased mitochondrial damage against P. falciparum compared to the untreated control. In conclusion, SeO32−, methylseleninic acid, selenomethionine and selenocystine have anti-plasmodial activities that induce apoptosis-like cell death in P. falciparum, and the anti-plasmodial effects of Se seem to be based on its chemical forms. The apoptosis-like cell-death mechanism in P. falciparum can be beneficial to respond to the growing problem of drug resistance.
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Liu C, Liu H, Li Y, Wu Z, Zhu Y, Wang T, Gao AC, Chen J, Zhou Q. Intracellular glutathione content influences the sensitivity of lung cancer cell lines to methylseleninic acid. Mol Carcinog 2011; 51:303-14. [DOI: 10.1002/mc.20781] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 02/18/2011] [Accepted: 03/18/2011] [Indexed: 12/20/2022]
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Weekley CM, Aitken JB, Vogt S, Finney LA, Paterson DJ, de Jonge MD, Howard DL, Musgrave IF, Harris HH. Uptake, Distribution, and Speciation of Selenoamino Acids by Human Cancer Cells: X-ray Absorption and Fluorescence Methods. Biochemistry 2011; 50:1641-50. [DOI: 10.1021/bi101678a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Claire M. Weekley
- School of Chemistry and Physics, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Jade B. Aitken
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Stefan Vogt
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Lydia A. Finney
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | | | | | | | - Ian F. Musgrave
- School of Medical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Hugh H. Harris
- School of Chemistry and Physics, The University of Adelaide, Adelaide, SA 5005, Australia
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Plano D, Baquedano Y, Ibáñez E, Jiménez I, Palop JA, Spallholz JE, Sanmartín C. Antioxidant-prooxidant properties of a new organoselenium compound library. Molecules 2010; 15:7292-312. [PMID: 20966875 PMCID: PMC6259179 DOI: 10.3390/molecules15107292] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Revised: 10/18/2010] [Accepted: 10/20/2010] [Indexed: 11/16/2022] Open
Abstract
The present study describes the biological evaluation of a library of 59 organo-selenium compounds as superoxide (O₂⁻) generators and cytotoxic agents in human prostate cancer cells (PC-3) and in breast adenocarcinoma (MCF-7). In order to corroborate that the biological activity for selenium compounds depends on the chemical form, a broad structural variety is presented. These structures include selenocyanates, diselenides, selenoalkyl functional moieties and eight newly synthesized symmetrically substituted dithioselenites and selenylureas. Eleven of the derivatives tested showed high levels of superoxide generation in vitro via oxidation of reduced glutathione (GSH) and nine of them were more catalytic than the reference compound, diselenodipropionic acid. Eighteen of the library compounds inhibited cell growth more than or similar to reference chemotherapeutic drugs in PC-3 and eleven were more potent cytotoxic agents than etoposide in the MCF-7 cell line. Considering both parameters (superoxide generation and cell cytotoxicity) compounds B1, C6 and C9 displayed the best therapeutic profiles. Considering that many diselenide compounds can generate superoxide (O₂⁻) in vitro via oxidation of GSH and other thiols, the analogue B1, that contains a diselenide moiety, was selected for a preliminary mechanistic investigation, which revealed that B1 has apoptogenic effects similar to camptothecin mediated by reactive oxygen species (ROS) in lymphocytic leukemia cells (CCRF-CEM) and affected the MCF-7 cell-cycle in G₂/M and S-phases.
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Affiliation(s)
- Daniel Plano
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
| | - Ylenia Baquedano
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
| | - Elena Ibáñez
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
| | - Iosu Jiménez
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
| | - Juan Antonio Palop
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
| | | | - Carmen Sanmartín
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea, 1,E-31008 Pamplona, Spain
- Author to whom correspondence should be addressed; E-Mail:
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Abstract
Selenium is an essential element with remarkable chemical properties. The similarity to sulphur results in a number of chemical interactions mainly connected to thiols and redox processes. The element modulates cell growth; in low concentrations it is absolutely required for growth and an essential component of serum free growth media. However moderate to high concentrations potently inhibit cell growth. The inhibitory effects are tumour specific and selenium induces apoptosis in malignant cells at concentrations that do not affect the viability of normal cells. Depending on concentration and chemical form selenium may prevent or treat tumour disease. Selenium supplementation has been found to be of value in preventing hepatocellular cancer by hepatitis B, in reducing the incidence of liver cancer in general and in decreasing mortality of colorectal, lung and prostate cancer. This review focuses on the current knowledge of the preventive effects of selenium with special emphasis on major human tumours. The unique chemical properties along with metabolism and preventive mechanisms are also discussed.
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Affiliation(s)
- Mikael Björnstedt
- Division of Pathology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge F46, 141 86 Stockholm, Sweden
| | - Aristi P. Fernandes
- Division of Pathology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge F46, 141 86 Stockholm, Sweden
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Chemopreventive mechanisms of α-keto acid metabolites of naturally occurring organoselenium compounds. Amino Acids 2010; 41:29-41. [PMID: 20383543 DOI: 10.1007/s00726-010-0578-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Accepted: 03/20/2010] [Indexed: 12/18/2022]
Abstract
Previous studies on the chemopreventive mechanisms of dietary selenium have focused on its incorporation into antioxidative selenoproteins, such as glutathione peroxidase and thioredoxin reductase. Several studies, however, have revealed that dietary selenium in the form of L-selenomethionine and the 21st amino acid, selenocysteine, also have intrinsic anti-cancer properties. Biochemical mechanisms previously investigated to contribute to their anticancer effects involve β- and γ-lyase reactions. Some pyridoxal 5'-phosphate (PLP)-containing enzymes can catalyze a β-lyase reaction with Se-methyl-L-selenocysteine (MSC) generating pyruvate and ammonia. Other PLP-enzymes can catalyze a γ-lyase reaction with L-selenomethionine (SM) generating α-ketobutyrate and ammonia. In both cases, a purported third product is methylselenol (CH(3)SeH). Although not directly quantifiable, as a result of its extreme hydrophobicity and high vapor pressure, CH(3)SeH has been indirectly observed to act through the alteration of protein-sulfhydryl moieties on redox-responsive signal and transcription factors, thereby maintaining a non-proliferative intracellular environment. We have considered the possibility that α-keto acid analogues of MSC (i.e., methylselenopyruvate; MSP) and SM (i.e., α-keto-γ-methylselenobutyrate; KMSB), generated via a transamination and/or L-amino acid oxidase reaction may also be chemoprotective. Indeed, these compounds were shown to increase the level of histone-H3 acetylation in human prostate and colon cancer cells. MSP and KMSB structurally resemble butyrate, an inhibitor of several histone deacetylases. Thus, the seleno α-keto acid metabolites of MSC and SM, along with CH(3)SeH derived from β- and γ-lyase reactions, may be potential direct-acting metabolites of organoselenium that lead to de-repression of silenced tumor suppressor proteins and/or regulation of genes and signaling molecules.
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