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Dauplais M, Romero S, Lazard M. Exposure to Selenomethionine and Selenocystine Induces Redox-Mediated ER Stress in Normal Breast Epithelial MCF-10A Cells. Biol Trace Elem Res 2024:10.1007/s12011-024-04244-y. [PMID: 38777874 DOI: 10.1007/s12011-024-04244-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 05/16/2024] [Indexed: 05/25/2024]
Abstract
Selenium is an essential trace element co-translationally incorporated into selenoproteins with important biological functions. Health benefits have long been associated with selenium supplementation. However, cytotoxicity is observed upon excessive selenium intake. The aim of this study is to investigate the metabolic pathways underlying the response to the selenium-containing amino acids selenomethionine and selenocysteine in a normal human breast epithelial cell model. We show that both selenomethionine and selenocystine inhibit the proliferation of non-cancerous MCF-10A cells in the same concentration range as cancerous MCF-7 and Hela cells, which results in apoptotic cell death. Selenocystine exposure in MCF-10A cells caused a severe depletion of free low molecular weight thiols, which might explain the observed upregulation of the expression of the oxidative stress pathway transcription factor NRF2. Both selenomethionine and selenocystine induced the expression of target genes of the unfolded protein response (GRP78, ATF4, CHOP). Using a redox-sensitive fluorescent probe targeted to the endoplasmic reticulum (ER), we show that both selenoamino acids shifted the ER redox balance towards an even more oxidizing environment. These results suggest that alteration of the redox state of the ER may disrupt protein folding and cause ER stress-induced apoptosis in MCF-10A cells exposed to selenoamino acids.
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Affiliation(s)
- Marc Dauplais
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France
| | - Stephane Romero
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France
| | - Myriam Lazard
- Laboratoire de Biologie Structurale de La Cellule, BIOC, École Polytechnique, CNRS-UMR7654, IP, Paris, Palaiseau, France.
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2
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Liu S, Chen J, Wang Y, Xu Y. Effect of dietary antioxidants on the risk of prostate cancer. Systematic review and network meta-analysis. NUTR HOSP 2023. [PMID: 37154035 DOI: 10.20960/nh.04558] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
OBJECTIVE the purpose of this study was to assess the impact of 14 treatments including a total of 10 dietary antioxidants on the risk of prostate cancer. MATERIAL AND METHODS we searched PubMed, Embase, the Cochrane Library, and the Web of Science for only randomized controlled trials (RCTs) to investigate the effect of these 10 antioxidants on the risk of getting prostate cancer. Using the Cochrane Risk of Bias Assessment Tool, the methodological quality of the included studies was evaluated. DATA EXTRACTION studies were appraised by two investigators and data were extracted. Using a surface under cumulative ranking (SUCRA) probability, a Bayesian network meta-analysis was undertaken to evaluate the relative ranking of agents. RESULTS from the earliest accessible date through August 2022, RCTs were gathered. A total of 14 randomized controlled trials were included with a total sample size of 73,365 males. The results of the network meta-analysis showed that green tea catechins (GTCs) significantly reduced the risk of prostate cancer (SUCRA, 88.6 %) followed by vitamin D (SUCRA, 55.1 %), vitamin B6 (54.1 %), and folic acid was the lowest (22.0 %). CONCLUSION based on the Ranking Plot of the Network, we can state that GTCs might have an impact on the prevention of prostate cancer compared to other dietary antioxidants, but we still need quality literature to further prove it.
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Affiliation(s)
- Siyu Liu
- Department of Urologic Surgery. Affiliated Tumor Hospital of Harbin Medical University
| | - Junhui Chen
- Department of Thoracic Surgery. Affiliated Tumor Hospital of Harbin Medical University
| | - Yiwen Wang
- Department of Urologic Surgery. Affiliated Tumor Hospital of Harbin Medical University
| | - Yangyang Xu
- Department of Urologic Surgery. Affiliated Tumor Hospital of Harbin Medical University
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3
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Zhang M, Li X, Cui X, Li R, Ma Z, Gao X. Selenomethionine promotes ANXA2 phosphorylation for proliferation and protein synthesis of myoblasts and skeletal muscle growth. J Nutr Biochem 2023; 115:109277. [PMID: 36739096 DOI: 10.1016/j.jnutbio.2023.109277] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
Selenomethionine (Se-Met) has many beneficial effects on higher animals and human, and can regulate cellular physiology through distinct signaling pathways. However, the role and molecular mechanism of Se-Met in skeletal muscle growth remains unclear. In this study, we observed the effects of Se-Met on C2C12 myoblasts and skeletal muscle growth of mice, and explored the corresponding molecular mechanism. Se-Met affected proliferation and protein synthesis of C2C12 myoblasts in a hormesis type of relationship, and had an optimal stimulatory effect at 50 µM concentration. Se-Met also affected mTOR, ANXA2, and PKCα phosphorylation in the same manner. ANXA2 knockdown blocked the stimulation of Se-Met on cell proliferation and protein synthesis and inhibition of Se-Met on autophagy of C2C12 myoblasts. Western blotting analysis showed that PI3K inhibition blocked the stimulation of Se-Met on mTOR phosphorylation. ANXA2 knockdown further blocked the stimulation of Se-Met on PI3K and mTOR phosphorylation. Point mutation experiment showed that ANXA2 mediated the stimulation of Se-Met on the PI3K-mTOR signaling through phosphorylation at Ser26. PKCα interacted with ANXA2, and PKCα knockdown blocked the stimulation of Se-Met on ANXA2 phosphorylation at Ser26. Se-Met addition (7.5mg/kg diet, 4 weeks) increased mouse carcass weight, promoted gastrocnemius skeletal muscle growth and ANXA2 and mTOR phosphorylation in this tissue. Collectively, our findings reveal that Se-Met can promote proliferation and protein synthesis of myoblasts and skeletal muscle growth through ANXA2 phosphorylation.
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Affiliation(s)
- Minghui Zhang
- College of Animal Science, Yangtze University, Jingmi Road 88, Jingzhou, 434025, China; College of Life Science, Northeast Agricultural University, Changjiang Road 600, Xiangfang District, Harbin, 150030, China
| | - Xueying Li
- College of Animal Science, Yangtze University, Jingmi Road 88, Jingzhou, 434025, China; College of Life Science, Northeast Agricultural University, Changjiang Road 600, Xiangfang District, Harbin, 150030, China
| | - Xu Cui
- College of Animal Science, Yangtze University, Jingmi Road 88, Jingzhou, 434025, China; College of Life Science, Northeast Agricultural University, Changjiang Road 600, Xiangfang District, Harbin, 150030, China
| | - Rui Li
- College of Animal Science, Yangtze University, Jingmi Road 88, Jingzhou, 434025, China
| | - Zonghua Ma
- College of Life Science, Northeast Agricultural University, Changjiang Road 600, Xiangfang District, Harbin, 150030, China
| | - Xuejun Gao
- College of Animal Science, Yangtze University, Jingmi Road 88, Jingzhou, 434025, China
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4
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Reversal of Multidrug Resistance by Symmetrical Selenoesters in Colon Adenocarcinoma Cells. Pharmaceutics 2023; 15:pharmaceutics15020610. [PMID: 36839934 PMCID: PMC9967742 DOI: 10.3390/pharmaceutics15020610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/31/2023] [Accepted: 02/07/2023] [Indexed: 02/15/2023] Open
Abstract
Recently, selenium containing derivatives have attracted more attention in medicinal chemistry. In the present work, the anticancer activity of symmetrical selenoesters was investigated by studying the reversal of efflux pump-related and apoptosis resistance in sensitive and resistant human colon adenocarcinoma cells expressing the ABCB1 protein. The combined effect of the compounds with doxorubicin was demonstrated with a checkerboard assay. The ABCB1 inhibitory and the apoptosis-inducing effects of the derivatives were measured with flow cytometry. Whole transcriptome sequencing was carried out on Illumina platform upon the treatment of resistant cells with the most potent derivatives. One ketone and three methyl ester selenoesters showed synergistic or weak synergistic interaction with doxorubicin, respectively. Ketone selenoesters were the most potent ABCB1 inhibitors and apoptosis inducers. Nitrile selenoesters could induce moderate early and late apoptotic processes that could be explained by their ABCB1 modulating properties. The transcriptome analysis revealed that symmetrical selenoesters may influence the redox state of the cells and interfere with metastasis formation. It can be assumed that these symmetrical selenocompounds possess toxic, DNA-damaging effects due to the presence of two selenium atoms in the molecule, which may be augmented by the presence of symmetrical groups.
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Tangjaidee P, Swedlund P, Xiang J, Yin H, Quek SY. Selenium-enriched plant foods: Selenium accumulation, speciation, and health functionality. Front Nutr 2023; 9:962312. [PMID: 36815133 PMCID: PMC9939470 DOI: 10.3389/fnut.2022.962312] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 09/13/2022] [Indexed: 02/09/2023] Open
Abstract
Selenium (Se) is an essential element for maintaining human health. The biological effects and toxicity of Se compounds in humans are related to their chemical forms and consumption doses. In general, organic Se species, including selenoamino acids such as selenomethionine (SeMet), selenocystine (SeCys2), and Se-methylselenocysteine (MSC), could provide greater bioactivities with less toxicity compared to those inorganics including selenite (Se IV) and selenate (Se VI). Plants are vital sources of organic Se because they can accumulate inorganic Se or metabolites and store them as organic Se forms. Therefore, Se-enriched plants could be applied as human food to reduce deficiency problems and deliver health benefits. This review describes the recent studies on the enrichment of Se-containing plants in particular Se accumulation and speciation, their functional properties related to human health, and future perspectives for developing Se-enriched foods. Generally, Se's concentration and chemical forms in plants are determined by the accumulation ability of plant species. Brassica family and cereal grains have excessive accumulation capacity and store major organic Se compounds in their cells compared to other plants. The biological properties of Se-enriched plants, including antioxidant, anti-diabetes, and anticancer activities, have significantly presented in both in vitro cell culture models and in vivo animal assays. Comparatively, fewer human clinical trials are available. Scientific investigations on the functional health properties of Se-enriched edible plants in humans are essential to achieve in-depth information supporting the value of Se-enriched food to humans.
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Affiliation(s)
- Pipat Tangjaidee
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Peter Swedlund
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Jiqian Xiang
- Enshi Autonomous Prefecture Academy of Agriculture Sciences, Enshi, Hubei, China
| | - Hongqing Yin
- Enshi Autonomous Prefecture Academy of Agriculture Sciences, Enshi, Hubei, China
| | - Siew Young Quek
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand,Riddet Institute New Zealand Centre of Research Excellence in Food, Palmerston North, New Zealand,*Correspondence: Siew Young Quek,
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6
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Blockage of Nrf2 and autophagy by L-selenocystine induces selective death in Nrf2-addicted colorectal cancer cells through p62-Keap-1-Nrf2 axis. Cell Death Dis 2022; 13:1060. [PMID: 36539411 PMCID: PMC9768144 DOI: 10.1038/s41419-022-05512-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/08/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022]
Abstract
Persistent Nrf2 activation is typically noted in many cancers, including colorectal cancer (CRC), aiding cancer cells in overcoming growth stress and promoting cancer progression. Sustained Nrf2 activation, which is beneficial for cancer cells, is called "Nrf2 addiction"; it is closely associated with malignancy and poor prognosis in patients with cancer. However, Nrf2 inhibitors may have adverse effects on normal cells. Here, we found that the selenocompound L-selenocystine (SeC) is selectively cytotoxic in the Nrf2-addicted CRC cell line WiDr cells, but not in non-Nrf2-addicted mesenchymal stem cells (MSCs) and normal human colon cells. Another CRC cell line, C2BBe1, which harbored lower levels of Nrf2 and its downstream proteins were less sensitive to SeC, compared with the WiDr cells. We further demonstrated that SeC inhibited Nrf2 and autophagy activation in the CRC cells. Antioxidant GSH pretreatment partially rescued the CRC cells from SeC-induced cytotoxicity and Nrf2 and autophagy pathway inhibition. By contrast, SeC activated Nrf2 and autophagy pathway in non-Nrf2-addicted MSCs. Transfecting WiDr cells with Nrf2-targeting siRNA decreased persistent Nrf2 activation and alleviated SeC cytotoxicity. In KEAP1-knockdown C2BBe1 cells, Nrf2 pathway activation increased SeC sensitivity and cytotoxicity. In conclusion, SeC selectively attacks cancer cells with constitutively activated Nrf2 by reducing Nrf2 and autophagy pathway protein expression through the P62-Nrf2-antioxidant response element axis and eventually trigger cell death.
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7
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Wade KH, Yarmolinsky J, Giovannucci E, Lewis SJ, Millwood IY, Munafò MR, Meddens F, Burrows K, Bell JA, Davies NM, Mariosa D, Kanerva N, Vincent EE, Smith-Byrne K, Guida F, Gunter MJ, Sanderson E, Dudbridge F, Burgess S, Cornelis MC, Richardson TG, Borges MC, Bowden J, Hemani G, Cho Y, Spiller W, Richmond RC, Carter AR, Langdon R, Lawlor DA, Walters RG, Vimaleswaran KS, Anderson A, Sandu MR, Tilling K, Davey Smith G, Martin RM, Relton CL. Applying Mendelian randomization to appraise causality in relationships between nutrition and cancer. Cancer Causes Control 2022; 33:631-652. [PMID: 35274198 PMCID: PMC9010389 DOI: 10.1007/s10552-022-01562-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 02/10/2022] [Indexed: 02/08/2023]
Abstract
Dietary factors are assumed to play an important role in cancer risk, apparent in consensus recommendations for cancer prevention that promote nutritional changes. However, the evidence in this field has been generated predominantly through observational studies, which may result in biased effect estimates because of confounding, exposure misclassification, and reverse causality. With major geographical differences and rapid changes in cancer incidence over time, it is crucial to establish which of the observational associations reflect causality and to identify novel risk factors as these may be modified to prevent the onset of cancer and reduce its progression. Mendelian randomization (MR) uses the special properties of germline genetic variation to strengthen causal inference regarding potentially modifiable exposures and disease risk. MR can be implemented through instrumental variable (IV) analysis and, when robustly performed, is generally less prone to confounding, reverse causation and measurement error than conventional observational methods and has different sources of bias (discussed in detail below). It is increasingly used to facilitate causal inference in epidemiology and provides an opportunity to explore the effects of nutritional exposures on cancer incidence and progression in a cost-effective and timely manner. Here, we introduce the concept of MR and discuss its current application in understanding the impact of nutritional factors (e.g., any measure of diet and nutritional intake, circulating biomarkers, patterns, preference or behaviour) on cancer aetiology and, thus, opportunities for MR to contribute to the development of nutritional recommendations and policies for cancer prevention. We provide applied examples of MR studies examining the role of nutritional factors in cancer to illustrate how this method can be used to help prioritise or deprioritise the evaluation of specific nutritional factors as intervention targets in randomised controlled trials. We describe possible biases when using MR, and methodological developments aimed at investigating and potentially overcoming these biases when present. Lastly, we consider the use of MR in identifying causally relevant nutritional risk factors for various cancers in different regions across the world, given notable geographical differences in some cancers. We also discuss how MR results could be translated into further research and policy. We conclude that findings from MR studies, which corroborate those from other well-conducted studies with different and orthogonal biases, are poised to substantially improve our understanding of nutritional influences on cancer. For such corroboration, there is a requirement for an interdisciplinary and collaborative approach to investigate risk factors for cancer incidence and progression.
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Affiliation(s)
- Kaitlin H Wade
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK.
| | - James Yarmolinsky
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Edward Giovannucci
- Departments of Nutrition and Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Sarah J Lewis
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
| | - Iona Y Millwood
- Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU) and the Medical Research Council Population Health Research Unit (MRC PHRU), Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Marcus R Munafò
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
- School of Psychological Science, University of Bristol, Bristol, UK
| | - Fleur Meddens
- Department of Economics, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Department of Applied Economics, Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, The Netherlands
| | - Kimberley Burrows
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Joshua A Bell
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Neil M Davies
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Daniela Mariosa
- International Agency for Research On Cancer (IARC), Lyon, France
| | | | - Emma E Vincent
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Karl Smith-Byrne
- International Agency for Research On Cancer (IARC), Lyon, France
| | - Florence Guida
- International Agency for Research On Cancer (IARC), Lyon, France
| | - Marc J Gunter
- International Agency for Research On Cancer (IARC), Lyon, France
| | - Eleanor Sanderson
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Frank Dudbridge
- Department of Health Sciences, University of Leicester, Leicester, UK
| | - Stephen Burgess
- MRC Biostatistics Unit, University of Cambridge, Cambridge, UK
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | | | - Tom G Richardson
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Maria Carolina Borges
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Jack Bowden
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Research Innovation Learning and Development (RILD) Building, University of Exeter Medical School, Exeter, UK
| | - Gibran Hemani
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Yoonsu Cho
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Wes Spiller
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Rebecca C Richmond
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Alice R Carter
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Ryan Langdon
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Deborah A Lawlor
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
| | - Robin G Walters
- Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU) and the Medical Research Council Population Health Research Unit (MRC PHRU), Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | | | - Annie Anderson
- Population Health and Genomics, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Meda R Sandu
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, Bristol, UK
| | - Kate Tilling
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
| | - George Davey Smith
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
| | - Richard M Martin
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
| | - Caroline L Relton
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council (MRC) Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Bristol National Institute for Health Research (NIHR) Biomedical Research Centre, Bristol, UK
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Adimulam T, Arumugam T, Foolchand A, Ghazi T, Chuturgoon AA. The Effect of Organoselenium Compounds on Histone Deacetylase Inhibition and Their Potential for Cancer Therapy. Int J Mol Sci 2021; 22:ijms222312952. [PMID: 34884764 PMCID: PMC8657714 DOI: 10.3390/ijms222312952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/20/2022] Open
Abstract
Genetic and epigenetic changes alter gene expression, contributing to cancer. Epigenetic changes in cancer arise from alterations in DNA and histone modifications that lead to tumour suppressor gene silencing and the activation of oncogenes. The acetylation status of histones and non-histone proteins are determined by the histone deacetylases and histone acetyltransferases that control gene transcription. Organoselenium compounds have become promising contenders in cancer therapeutics. Apart from their anti-oxidative effects, several natural and synthetic organoselenium compounds and metabolites act as histone deacetylase inhibitors, which influence the acetylation status of histones and non-histone proteins, altering gene transcription. This review aims to summarise the effect of natural and synthetic organoselenium compounds on histone and non-histone protein acetylation/deacetylation in cancer therapy.
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Hou Y, Wang W, Bartolo P. A concise review on the role of selenium for bone cancer applications. Bone 2021; 149:115974. [PMID: 33901723 DOI: 10.1016/j.bone.2021.115974] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 01/20/2023]
Abstract
Cancer is one of the most challenging health problems in the world. Several clinical treatments have been developed, but all presenting several limitations. Among different types of cancer, bone cancer is less common, and limited new clinical treatment strategies have been proposed. Recently, a range of advanced materials has been investigated and applied for bone cancer treatment applications. However, due to the unique physiological properties of the bone tissue (a load-bearing tissue), the selection of the right type of material or the combination of suitable functional materials and base materials are critical. Selenium has been reported to present specific targeting inhibition effects on bone cancer without affecting the surrounding healthy tissue, revealing a huge potential for the development of new bone cancer treatment strategies. This paper presents a concise review on the use of selenium for bone cancer applications, discussing main synthesis methods, biocompatibility, and cytotoxicity aspects and the combination of selenium with a wide range of ceramics, metals, and polymers. Future perspectives and the novel concept of a dual-functional scaffold for both cancer treatment and new bone regeneration are also discussed.
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Affiliation(s)
- Yanhao Hou
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, UK
| | - Weiguang Wang
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, UK
| | - Paulo Bartolo
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, UK.
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Chuai H, Zhang SQ, Bai H, Li J, Wang Y, Sun J, Wen E, Zhang J, Xin M. Small molecule selenium-containing compounds: Recent development and therapeutic applications. Eur J Med Chem 2021; 223:113621. [PMID: 34217061 DOI: 10.1016/j.ejmech.2021.113621] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is an essential micronutrient of organism and has important function. It participates in the functions of selenoprotein in several manners. In recent years, Se has attracted much attention because of its therapeutic potential against several diseases. Many natural and synthetic organic Se-containing compounds were studied and explored for the treatment of cancer and other diseases. Studies have showed that incorporation of Se atom into small molecules significantly enhanced their bioactivities. In this paper, according to different applications and structural characteristics, the research progress and therapeutic application of Se-containing compounds are reviewed, and more than 110 Se-containing compounds were selected as representatives which showed potent activities such as anticancer, antioxidant, antifibrolytic, antiparasitic, antibacterial, antiviral, antifungal and central nervous system related effects. This review is expected to provide a basis for further study of new promising Se-containing compounds.
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Affiliation(s)
- Hongyan Chuai
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - San-Qi Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Huanrong Bai
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Jiyu Li
- Henan Xibaikang Health Industry Co., Ltd, Jiyuan, Henan, 459006, PR China
| | - Yang Wang
- Henan Xibaikang Health Industry Co., Ltd, Jiyuan, Henan, 459006, PR China
| | - Jiajia Sun
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Ergang Wen
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Jiye Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Minhang Xin
- Department of Medicinal Chemistry, School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 West Yanta Road, Xi'an, Shaanxi, 710061, PR China.
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Nasim MJ, Zuraik MM, Abdin AY, Ney Y, Jacob C. Selenomethionine: A Pink Trojan Redox Horse with Implications in Aging and Various Age-Related Diseases. Antioxidants (Basel) 2021; 10:antiox10060882. [PMID: 34072794 PMCID: PMC8229699 DOI: 10.3390/antiox10060882] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/18/2021] [Accepted: 05/27/2021] [Indexed: 01/15/2023] Open
Abstract
Selenium is an essential trace element. Although this chalcogen forms a wide variety of compounds, there are surprisingly few small-molecule organic selenium compounds (OSeCs) in biology. Besides its more prominent relative selenocysteine (SeCys), the amino acid selenomethionine (SeMet) is one example. SeMet is synthesized in plants and some fungi and, via nutrition, finds its way into mammalian cells. In contrast to its sulfur analog methionine (Met), SeMet is extraordinarily redox active under physiological conditions and via its catalytic selenide (RSeR')/selenoxide (RSe(O)R') couple provides protection against reactive oxygen species (ROS) and other possibly harmful oxidants. In contrast to SeCys, which is incorporated via an eloquent ribosomal mechanism, SeMet can enter such biomolecules by simply replacing proteinogenic Met. Interestingly, eukaryotes, such as yeast and mammals, also metabolize SeMet to a small family of reactive selenium species (RSeS). Together, SeMet, proteins containing SeMet and metabolites of SeMet form a powerful triad of redox-active metabolites with a plethora of biological implications. In any case, SeMet and its family of natural RSeS provide plenty of opportunities for studies in the fields of nutrition, aging, health and redox biology.
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Affiliation(s)
- Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Mhd Mouayad Zuraik
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Ahmad Yaman Abdin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
- University Lille, CNRS, Centrale Lille, University Artois, UMR 8181–UCCS–Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Yannick Ney
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.M.Z.); (A.Y.A.); (Y.N.)
- Correspondence: ; Tel.: +49-681-302-3129
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Shoeibi S. Comparative Analysis of the Rabbit Endothelial Progenitor Cells from Bone Marrow and Peripheral Blood Treated with Selenium Nanoparticles. Anticancer Agents Med Chem 2021; 21:803-808. [PMID: 32951582 DOI: 10.2174/1871520620666200918112552] [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: 03/09/2020] [Revised: 07/05/2020] [Accepted: 08/08/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Selenium Nanoparticles (Se-NPs) are known for their antioxidant and anti-inflammatory activities, which are effective in preventing oxidative damage and improving physiological processes. OBJECTIVES This study aimed at investigating the effects of biosynthesized Se-NPs on bone marrow-derived Endothelial Progenitor Cells (bone marrow-derived EPCs) and blood-derived endothelial progenitor cells (blood-derived EPCs) isolated from rabbits in vitro. METHODS The cultured EPCs incubated with biosynthesized Se-NPs at the concentrations of 0.19, 0.38, 0.76, 1.71, 3.42, 7.03, 14.25, 28.50, 57, 114, and 228μg/ml for 48h. After screening the proliferative potential of the Se-NPs by the MTT assay, the best concentrations were selected for Real-Time quantitative Polymerase Chain Reaction (RT-qPCR). Real-time quantification of Vascular Cell Adhesion Molecule 1 (VCAM-1), lectin-like oxidized Low-Density Lipoprotein (LDL) receptor-1 (LOX-1), endothelial Nitric Oxide Synthase (eNOS), and Monocyte Chemoattractant Protein-1 (MCP-1) gene expressions were analyzed by normalizing with Glyceraldehyde- 3-Phosphate Dehydrogenase (GAPDH) as an endogenous reference gene. RESULTS Blood-derived EPCs and bone marrow-derived EPCs showed morphological differences before treatment in vitro. Se-NPs treated EPCs indicated a significant dose-dependent proliferative activity (p<0.01). In general, the expression levels of VCAM-1, LOX-1, and MCP-1 mRNA were significantly decreased (p<0.01), whereas that of the eNOS expression was significantly increased at the concentrations of 7.3 and 14.25μg/ml (p<0.01). Although the expressions of MCP-1, LOX-1, and eNOS mRNA were decreased at certain concentrations of Se-NPs (p<0.01 and p<0.05, respectively) in the treated bone marrow-derived EPCs, no significant differences were observed in the VCAM-1 mRNA expression levels in bone marrow-derived EPCs compared with the control group (p>0.05). CONCLUSION This was the first report to demonstrate the effects of Se-NPs on proliferative, anti-oxidative, and anti-inflammatory activities for bone marrow-derived EPCs and blood-derived EPCs. Our findings suggested that Se-NPs could be considered as an effective agent that may ameliorate vascular problems.
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Affiliation(s)
- Sara Shoeibi
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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13
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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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14
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15
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Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging. COATINGS 2020. [DOI: 10.3390/coatings10030280] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Selenium is a natural element which exists in the human body and plays an important role in metabolism. Along with this, selenium also possesses antibacterial and antioxidant properties. Using selenium microparticles (SeMPs) in food packaging films is exceptional. In this experiment, a solution casting method was used to make film. For this purpose, we used polylactic acid (PLA) as a substrate for the formation of a film membrane while SeMPs were added with certain ratios to attain antibacterial and antioxidant properties. The effects of SeMPs on the PLA film and the value of SeMPs in food packaging film production were investigated. The effects of the SeMPs contents on the features of the film, such as its mechanical property, solubility, swelling capacity, water vapor permeability, antioxidant activity, and the antibacterial activity of the composite membrane against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) strains, were studied. The results manifest that the PLA/SeMPs films showed higher water resistance, UV resistance, antioxidant activity, and antibacterial activity than pure PLA film. When the concentration of SeMPs was 1.5 wt%, the composite membrane showed the best comprehensive performance. Although the tensile strength and elongation at break of the membrane were slightly reduced by the addition of SeMPs, the results show that PLA/SeMPs films are still suitable for food packaging and would be a very promising material for food packaging.
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Abstract
A variety of diet and lifestyle factors have been studied with respect to prostate cancer risk in large, prospective cohort studies. In spite of this work, and in contrast to other common cancers, few modifiable risk factors have been firmly established as playing a role in prostate cancer. There are several possible explanations for the lack of well-established risk factors. First, prostate cancer has among the highest heritability of all common cancers; second, early life exposures may play an important role in risk, rather than mid- and later-life exposures assessed in most epidemiological studies. Finally, prostate-specific antigen (PSA) screening plays a critical role in prostate cancer detection and incidence rates, which has important implications for epidemiological studies.Among modifiable risk factors, smoking and obesity are consistently associated with higher risk specifically of advanced prostate cancer. There is also considerable evidence for a positive association between dairy intake and overall prostate cancer risk, and an inverse association between cooked tomato/lycopene intake and risk of advanced disease. Several other dietary factors consistently associated with risk in observational studies, including selenium and vitamin E, have been cast into doubt by results from clinical trials. Results for other well-studied dietary factors, including fat intake, red meat, fish, vitamin D, soy and phytoestrogens are mixed.In practical terms, men concerned with prostate cancer risk should be encouraged to stop smoking, be as physically active as possible, and achieve or maintain a healthy weight. These recommendations also have the advantage of having a positive impact on risk of type 2 diabetes, cardiovascular disease, and other chronic diseases. Reducing dairy intake while increasing consumption of fish and tomato products is also reasonable advice.
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Liu F, Liu H, Liu R, Xiao C, Duan X, McClements DJ, Liu X. Delivery of Sesamol Using Polyethylene-Glycol-Functionalized Selenium Nanoparticles in Human Liver Cells in Culture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:2991-2998. [PMID: 30779555 DOI: 10.1021/acs.jafc.8b06924] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Anticancer nanoparticles were fabricated by linking the nanoparticles of two known anticancer agents, sesamol and selenium, using polyethylene glycol (PEG). The successful fabrication of the sesamol-PEG-selenium nanoparticles (PEG-SeNPs), which had a sesamol loading efficiency of 10.0 ± 0.5 wt %, was demonstrated using different spectroscopic techniques. The impact of the nanoparticles on model cancer cells (HepG2) was established using the cell activity test, morphological observation, and fluorescent staining, which all showed that nanoparticles effectively inhibited the HepG2 cells. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays showed that the concentration of the sample that inhibits 50% of the cells of PEG-SeNPs and sesamol-PEG-SeNPs on HepG2 cells was 413.8 and 68.7 μg/mL, respectively, which indicated the synergistic inhibition between sesamol and selenium nanoparticles. Furthermore, flow cytometry showed that sesamol-PEG-SeNPs exhibited higher apoptosis than either sesamol or PEG-SeNPs alone. Finally, western blot confirmed that the apoptostic ability of sesamol-PEG-SeNPs was associated with downregulation of Bcl-2 and procaspase-3, upregulation of Bax and PARP, and discharge of cytochrome c into the cytosol. Our findings suggest the novel sesamol nanoparticles may be efficient anticancer agents.
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Affiliation(s)
- Fuguo Liu
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
| | - Hua Liu
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
| | - Runhua Liu
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
| | - Chunxia Xiao
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
| | - Xiang Duan
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
| | - David Julian McClements
- Department of Food Science , University of Massachusetts Amherst , 102 Holdsworth Way , Amherst , Massachusetts 01003 , United States
| | - Xuebo Liu
- College of Food Science and Engineering , Northwest A&F University , 28 Xinong Road , Yangling , Shaanxi 712100 , People's Republic of China
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18
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Njoroge RN, Vatapalli RJ, Abdulkadir SA. Organoids Increase the Predictive Value of in vitro Cancer Chemoprevention Studies for in vivo Outcome. Front Oncol 2019; 9:77. [PMID: 30842936 PMCID: PMC6391333 DOI: 10.3389/fonc.2019.00077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 01/29/2019] [Indexed: 12/25/2022] Open
Abstract
Epidemiological and preclinical data suggest that antioxidants are protective against prostate cancer whose pathogenesis has been linked to oxidative stress. However, the selenium and vitamin E Cancer Prevention Trial (SELECT), found no efficacy for selenium in reducing prostate cancer incidence while vitamin E was associated with an increased risk of the disease. These results have called in to question the models used in preclinical chemoprevention efficacy studies and their ability to predict in vivo outcomes. Chemoprevention agents have traditionally been tested on two dimensional monolayer cultures of cell lines derived from advanced prostate cancers. But as SELECT demonstrates, results from advanced disease models were not predictive of the outcome of a primary chemoprevention trial. Additionally, lack of cell-matrix interactions in two dimensional cultures results in loss of biochemical and mechanical cues relevant for native tissue architecture. We use recent findings in three dimensional organoid cultures that recapitulated the SELECT trial results to argue that the organoid model could increase the predictive value of in vitro studies for in vivo outcomes.
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Affiliation(s)
- Rose N Njoroge
- Department of Urology, Northwestern University, Feinberg School of Medicine, Chicago, IL, United States.,Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Rajita J Vatapalli
- Department of Urology, Northwestern University, Feinberg School of Medicine, Chicago, IL, United States.,Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Sarki A Abdulkadir
- Department of Urology, Northwestern University, Feinberg School of Medicine, Chicago, IL, United States.,Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.,Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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19
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Production of Selenomethionine-Enriched Bifidobacterium bifidum BGN4 via Sodium Selenite Biocatalysis. Molecules 2018; 23:molecules23112860. [PMID: 30400218 PMCID: PMC6278457 DOI: 10.3390/molecules23112860] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022] Open
Abstract
Selenium is a trace element essential for human health that has received considerable attention due to its nutritional value. Selenium’s bioactivity and toxicity are closely related to its chemical form, and several studies have suggested that the organic form of selenium (i.e., selenomethionine) is more bioavailable and less toxic than its inorganic form (i.e., sodium selenite). Probiotics, especially Bifidobacteriium and Lactobacillus spp., have received increasing attention in recent years, due to their intestinal microbial balancing effects and nutraceutical benefits. Recently, the bioconversion (a.k.a biotransformation) of various bioactive molecules (e.g., minerals, primary and secondary metabolites) using probiotics has been investigated to improve substrate biofunctional properties. However, there have been few reports of inorganic selenium conversion into its organic form using Bifidobacterium and Lactobacillus spp. Here we report that the biosynthesis of organic selenium was accomplished using the whole cell bioconversion of sodium selenite under controlled Bifidobacterium bifidum BGN4 culture conditions. The total amount of organic and inorganic selenium was quantified using an inductively coupled plasma-atomic emission spectrometer (ICP-AES). The selenium species were separated via anion-exchange chromatography and analyzed with inductively coupled plasma-mass spectrometry (ICP-MS). Our findings indicated that the maximum level of organic selenium was 207.5 µg/g in selenium-enriched B. bifidum BGN4. Selenomethionine was the main organic selenium in selenium-enriched B. bifidum BGN4 (169.6 µg/g). Considering that B. bifidum BGN4 is a commercial probiotic strain used in the functional food industry with clinically proven beneficial effects, selenium-enriched B. bifidum BGN4 has the potential to provide dual healthy functions as a daily supplement of selenium and regulator of intestinal bacteria. This is the first report on the production of organic selenium using B. bifidum spp.
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20
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Gandin V, Khalkar P, Braude J, Fernandes AP. Organic selenium compounds as potential chemotherapeutic agents for improved cancer treatment. Free Radic Biol Med 2018; 127:80-97. [PMID: 29746900 DOI: 10.1016/j.freeradbiomed.2018.05.001] [Citation(s) in RCA: 188] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/12/2018] [Accepted: 05/01/2018] [Indexed: 12/16/2022]
Abstract
Selenium(Se)-containing compounds have attracted a growing interest as anticancer agents over recent decades, with mounting reports demonstrating their high efficacy and selectivity against cancer cells. Typically, Se compounds exert their cytotoxic effects by acting as pro-oxidants that alter cellular redox homeostasis. However, the precise intracellular targets, signalling pathways affected and mechanisms of cell death engaged following treatment vary with the chemical properties of the selenocompound and its metabolites, as well as the cancer model that is used. Naturally occurring organic Se compounds, besides encompassing a significant antitumor activity with an apparent ability to prevent metastasis, also seem to have fewer side effects and less systemic effects as reported for many inorganic Se compounds. On this basis, many novel organoselenium compounds have also been synthesized and examined as potential chemotherapeutic agents. This review aims to summarize the most well studied natural and synthetic organoselenium compounds and provide the most recent developments in our understanding of the molecular mechanisms that underlie their potential anticancer effects.
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Affiliation(s)
- Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Prajakta Khalkar
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Jeremy Braude
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Aristi P Fernandes
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, SE-171 77 Stockholm, Sweden.
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21
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Fernandes J, Hu X, Ryan Smith M, Go YM, Jones DP. Selenium at the redox interface of the genome, metabolome and exposome. Free Radic Biol Med 2018; 127:215-227. [PMID: 29883789 PMCID: PMC6168380 DOI: 10.1016/j.freeradbiomed.2018.06.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/19/2018] [Accepted: 06/02/2018] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is a redox-active environmental mineral that is converted to only a small number of metabolites and required for a relatively small number of mammalian enzymes. Despite this, dietary and environmental Se has extensive impact on every layer of omics space. This highlights a need for global network response structures to provide reference for targeted, hypothesis-driven Se research. In this review, we survey the Se research literature from the perspective of the responsive physical and chemical barrier between an organism (functional genome) and its environment (exposome), which we have previously termed the redox interface. Recent advances in metabolomics allow molecular phenotyping of the integrated genome-metabolome-exposome structure. Use of metabolomics with transcriptomics to map functional network responses to supplemental Se in mice revealed complex network responses linked to dyslipidemia and weight gain. Central metabolic hubs in the network structure in liver were not directly linked to transcripts for selenoproteins but were, instead, linked to transcripts for glucose transport and fatty acid β-oxidation. The experimental results confirm the survey of research literature in showing that Se interacts with the functional genome through a complex network response structure. The results imply that systematic application of data-driven integrated omics methods to models with controlled Se exposure could disentangle health benefits and risks from Se exposures and also serve more broadly as an experimental paradigm for exposome research.
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Affiliation(s)
- Jolyn Fernandes
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Xin Hu
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - M Ryan Smith
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Young-Mi Go
- Department of Medicine, Emory University, Atlanta, GA 30322, United States.
| | - Dean P Jones
- Department of Medicine, Emory University, Atlanta, GA 30322, United States.
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22
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Yarmolinsky J, Wade KH, Richmond RC, Langdon RJ, Bull CJ, Tilling KM, Relton CL, Lewis SJ, Davey Smith G, Martin RM. Causal Inference in Cancer Epidemiology: What Is the Role of Mendelian Randomization? Cancer Epidemiol Biomarkers Prev 2018; 27:995-1010. [PMID: 29941659 PMCID: PMC6522350 DOI: 10.1158/1055-9965.epi-17-1177] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/15/2018] [Accepted: 06/05/2018] [Indexed: 02/07/2023] Open
Abstract
Observational epidemiologic studies are prone to confounding, measurement error, and reverse causation, undermining robust causal inference. Mendelian randomization (MR) uses genetic variants to proxy modifiable exposures to generate more reliable estimates of the causal effects of these exposures on diseases and their outcomes. MR has seen widespread adoption within cardio-metabolic epidemiology, but also holds much promise for identifying possible interventions for cancer prevention and treatment. However, some methodologic challenges in the implementation of MR are particularly pertinent when applying this method to cancer etiology and prognosis, including reverse causation arising from disease latency and selection bias in studies of cancer progression. These issues must be carefully considered to ensure appropriate design, analysis, and interpretation of such studies. In this review, we provide an overview of the key principles and assumptions of MR, focusing on applications of this method to the study of cancer etiology and prognosis. We summarize recent studies in the cancer literature that have adopted a MR framework to highlight strengths of this approach compared with conventional epidemiological studies. Finally, limitations of MR and recent methodologic developments to address them are discussed, along with the translational opportunities they present to inform public health and clinical interventions in cancer. Cancer Epidemiol Biomarkers Prev; 27(9); 995-1010. ©2018 AACR.
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Affiliation(s)
- James Yarmolinsky
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Kaitlin H Wade
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Rebecca C Richmond
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Ryan J Langdon
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Caroline J Bull
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Kate M Tilling
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Caroline L Relton
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Sarah J Lewis
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - George Davey Smith
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Richard M Martin
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom.
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
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Kim JJ, Pham PH, Hamilton ME, Lee LEJ, Bols NC. Effect of selenomethionine on cell viability and heat shock protein 70 levels in rainbow trout intestinal epithelial cells at hypo-, normo-, and hyper-thermic temperatures. J Therm Biol 2018; 76:107-114. [PMID: 30143285 DOI: 10.1016/j.jtherbio.2018.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 06/07/2018] [Accepted: 07/21/2018] [Indexed: 10/28/2022]
Abstract
As global warming and environmental pollution modify aquatic environments, the thermal biology of fish could be affected by interactions between temperature and pollutants, such as selenium (Se). Therefore, selenomethionine (SeMet) was studied for effects on cell viability and on heat shock protein 70 (HSP70) levels in the rainbow trout intestinal epithelial cell, RTgutGC, at hypothermic (4 °C), normothermic (14 and 18 °C) and hyperthermic (26 °C) temperatures. RTgutGC cultures remained viable for at least a week at all temperatures, although energy metabolism as measured with Alamar Blue (resazurin) was appreciably diminished at 4 °C. Over a 7-day incubation, HSP 70 levels in cultures remained steady at 4 °C, declined at 18 °C, and increased slightly at 26 °C. When 125 μM SeMet was present, cultures remained viable and HSP70 levels were neither increased nor decreased relative to control cultures, regardless of the temperature. With 500 and 1000 μM SeMet, cell viability was profoundly impaired after 7 days in cultures at 14, 18 and 26 °C but was unchanged at 4 °C. Overall the results suggest that only hypothermia modulated the response of rainbow trout cells to SeMet.
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Affiliation(s)
- John J Kim
- Department of Biology, University of Waterloo, Waterloo, Canada N2L 3G1
| | - Phuc H Pham
- Department of Biology, University of Waterloo, Waterloo, Canada N2L 3G1
| | - Mark E Hamilton
- Department of Biology, University of Waterloo, Waterloo, Canada N2L 3G1
| | - Lucy E J Lee
- Faculty of Science, University of the Fraser Valley, Abbotsford, Canada BC V2S 7M8
| | - Niels C Bols
- Department of Biology, University of Waterloo, Waterloo, Canada N2L 3G1.
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Lazard M, Dauplais M, Blanquet S, Plateau P. Recent advances in the mechanism of selenoamino acids toxicity in eukaryotic cells. Biomol Concepts 2018; 8:93-104. [PMID: 28574376 DOI: 10.1515/bmc-2017-0007] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 05/03/2017] [Indexed: 12/31/2022] Open
Abstract
Selenium is an essential trace element due to its incorporation into selenoproteins with important biological functions. However, at high doses it is toxic. Selenium toxicity is generally attributed to the induction of oxidative stress. However, it has become apparent that the mode of action of seleno-compounds varies, depending on its chemical form and speciation. Recent studies in various eukaryotic systems, in particular the model organism Saccharomyces cerevisiae, provide new insights on the cytotoxic mechanisms of selenomethionine and selenocysteine. This review first summarizes current knowledge on reactive oxygen species (ROS)-induced genotoxicity of inorganic selenium species. Then, we discuss recent advances on our understanding of the molecular mechanisms of selenocysteine and selenomethionine cytotoxicity. We present evidences indicating that both oxidative stress and ROS-independent mechanisms contribute to selenoamino acids cytotoxicity. These latter mechanisms include disruption of protein homeostasis by selenocysteine misincorporation in proteins and/or reaction of selenols with protein thiols.
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Liu Y, Ma L, Zhou H, Zhu X, Yu Q, Chen X, Zhao Y, Liu J. Polypeptide nano-Se targeting inflammation and theranostic rheumatoid arthritis by anti-angiogenic and NO activating AMPKα signaling pathway. J Mater Chem B 2018; 6:3497-3514. [DOI: 10.1039/c8tb00080h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease and there is a lack of effective treatments.
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Affiliation(s)
- Yanan Liu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Litao Ma
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Hui Zhou
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Xufeng Zhu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Qianqian Yu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Xu Chen
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Yingyu Zhao
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Jie Liu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
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Pansare AV, Shedge AA, Patil VR. Discrete SeNPs-Macromolecule Binding Manipulated by Hydrophilic Interaction. Int J Biol Macromol 2017; 107:1982-1987. [PMID: 29032211 DOI: 10.1016/j.ijbiomac.2017.10.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 11/17/2022]
Abstract
Nanoparticle-protein conjugates are promising probes for biological diagnostics and versatile building blocks for nanotechnology. Here we demonstrate the interaction of SeNPs with BSA macromolecule simply by physical adsorption method. The interaction between SeNPs and BSA has been investigated by UV-Vis, fluorescence, circular dichroism (CD) spectroscopic and thermal methods. The esterase-like activity of BSA towards PNPA was investigated in the presence of SeNPs. The effects of SeNPs on the stability and conformational changes of BSA were studied, which indicated that the binding of SeNPs with BSA induced relative changes in secondary structure of protein. SeNPs acted as a structure stabilizer for BSA which was further confirmed by thermal denaturation study. The hydrophilic bonding forces played important roles in the BSA-SeNPs complex formation. The putative binding site of SeNPs on BSA was near to Sudlow's site II. The hydrophilic interaction of SeNPs on the stability and structure of BSA would find promising application in drug delivery system.
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Affiliation(s)
- Amol V Pansare
- Department of Chemistry, University of Mumbai, Santacruz (E), Mumbai, 400098, India
| | - Amol A Shedge
- Department of Chemistry, University of Mumbai, Santacruz (E), Mumbai, 400098, India
| | - Vishwanath R Patil
- Department of Chemistry, University of Mumbai, Santacruz (E), Mumbai, 400098, India.
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Murdolo G, Bartolini D, Tortoioli C, Piroddi M, Torquato P, Galli F. Selenium and Cancer Stem Cells. Adv Cancer Res 2017; 136:235-257. [PMID: 29054420 DOI: 10.1016/bs.acr.2017.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is an essential micronutrient that functions as "redox gatekeeper" and homeostasis factor of normal and cancer cells. Epidemiology and experimental studies, in the last years suggested that both inorganic and organic forms of Se may have favorable health effects. In this regard, a protective action of Se on cellular systems that may help preventing cancer cell differentiation has been demonstrated, while the hypothesis that Se compounds may cure cancer and its metastatic diffusion appears speculative and is still a matter of investigation. Indeed, the overall actions of Se compounds in carcinogenesis are controversial. The recognition that cancer is a stem cell disease instigated major paradigm shifts in our basic understanding of cancer and attracted a great deal of interest. Although current treatment approaches in cancer are grounded in the need to kill the majority of cancer cells, targeting cancer stem cells (CSCs) may hold great potential in improving cancer treatment. In this respect, Se compounds have been demonstrated modulating numerous signaling pathways involved in CSC biology and these findings are now stimulating further research on optimal Se concentrations, most effective and cancer-specific Se compounds, and inherent pathways involved in redox and metabolic regulation of CSCs. In this review, we summarize the current knowledge about the effects of Se compounds on CSCs, by focusing on redox-dependent pathways and main gene regulation checkpoints that affect self-renewal, differentiation, and migration responses in this subpopulation of cancer cells.
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Affiliation(s)
- Giuseppe Murdolo
- Section of Internal Medicine, Endocrine and Metabolic Sciences, University of Perugia, Perugia, Italy.
| | | | - Cristina Tortoioli
- Section of Internal Medicine, Endocrine and Metabolic Sciences, University of Perugia, Perugia, Italy
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Bloch SR, Kim JJ, Pham PH, Hodson PV, Lee LEJ, Bols NC. Responses of an American eel brain endothelial-like cell line to selenium deprivation and to selenite, selenate, and selenomethionine additions in different exposure media. In Vitro Cell Dev Biol Anim 2017; 53:940-953. [PMID: 28940125 DOI: 10.1007/s11626-017-0196-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/09/2017] [Indexed: 01/08/2023]
Abstract
The effect of selenium deprivation and addition on the American eel brain endothelial cell line (eelB) was studied in three exposure media: complete growth medium (L15/FBS), serum-free medium (L15), and minimal medium (L15/ex). L15/ex contains only galactose and pyruvate and allowed the deprivation of selenium on cells to be studied. In L15/ex, without any obvious source of selenium, eelB cells survived for at least 7 d, formed capillary-like structures (CLS) on Matrigel, and migrated to heal wounds. Three selenium compounds were added to cultures: selenite, selenate, and selenomethionine (SeMet). Adding selenite or selenate to eelB cell cultures for 24 h caused dose-dependent declines in cell viability, regardless of the exposure media. Although varying with exposure media and viability end point, selenite was approximately 70-fold more cytotoxic than selenate. By contrast, 24 h exposures to either DL- or L-SeMet in the three media caused little or no cytotoxicity. However for 7 d exposures in L15/ex, DL- and L-SeMet were very cytotoxic, even at the lowest tested concentration of 31 μM. By contrast in L15 and L15/FBS, cytotoxicity was only observed with 500 and 1000 μM L-SeMet. In L15/FBS, eelB continued to migrate and form CLS in the presence of SeMet but at 500 μM, cell migration appeared stimulated. As judged from a colony-forming assay over 14 d in L15/FBS, 500 and 1000 μM DL- and L-SeMet inhibited cell proliferation. Overall, the responses of eel cells to selenium depended on the selenium form, concentration, and exposure media, with responses to SeMet being most dependent on exposure media.
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Affiliation(s)
- Sophia R Bloch
- Department of Biology, University of Waterloo, Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - John J Kim
- Department of Biology, University of Waterloo, Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Phuc H Pham
- Department of Biology, University of Waterloo, Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Peter V Hodson
- Department of Biology and School of Environmental Studies, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Lucy E J Lee
- Faculty of Science, University of the Fraser Valley, Abbotsford, BC, V2S 7M8, Canada
| | - Niels C Bols
- Department of Biology, University of Waterloo, Waterloo, Waterloo, ON, N2L 3G1, Canada.
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Superoxide-hydrogen peroxide genetic imbalance modulates differentially the oxidative metabolism on human peripheral blood mononuclear cells exposed to seleno-L-methionine. Chem Biol Interact 2017; 273:18-27. [DOI: 10.1016/j.cbi.2017.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/20/2017] [Accepted: 05/07/2017] [Indexed: 12/15/2022]
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Luo J, Hu Z, Xiao Y, Yang T, Dong C, Huang J, Zhou HB. Rational design and optimization of selenophenes with basic side chains as novel potent selective estrogen receptor modulators (SERMs) for breast cancer therapy. MEDCHEMCOMM 2017; 8:1485-1497. [PMID: 30108860 PMCID: PMC6072463 DOI: 10.1039/c7md00163k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 05/23/2017] [Indexed: 12/12/2022]
Abstract
To increase the diversity of estrogen receptor (ER) ligands having novel structures and activities, series of selenophene derivatives with a basic side chain (BSC) were synthesized and their biological activity as subtype-selective antagonists for the ER was explored. Compared with the selenophenes without a BSC, most compounds showed an increase in binding affinity, and several compounds displayed enhanced antagonist potency and antiproliferative activity. Especially, compound 16c exhibited excellent transcriptional activity for ERα (IC50 = 13 nM) which made this compound the most potent antagonist for ERα of the whole series and is 66-fold better than the best selenophene compound without a BSC. Moreover, several compounds showed values of IC50 better than that of 4-hydroxytamoxifen in breast cancer MCF-7 cells. The modeling study indicated that the basic side chain might contribute to their increased antagonist potency and antiproliferative activity. These new ligands have the potential to be further developed as novel agents to improve therapeutics that target the estrogen receptor.
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Affiliation(s)
- Junjie Luo
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
| | - Zhiye Hu
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
| | - Yuan Xiao
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
| | - Tongxin Yang
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
| | - Chune Dong
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
- Key Laboratory of Organofluorine Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , Shanghai 200032 , China
| | - Jian Huang
- College of Life Sciences , Wuhan University , Wuhan 430072 , China
| | - Hai-Bing Zhou
- Hubei Provincial Key Laboratory of Developmentally Originated Disease , Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals , State Key Laboratory of Virology , Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China .
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Hodjat M, Rahmani S, Khan F, Niaz K, Navaei–Nigjeh M, Mohammadi Nejad S, Abdollahi M. Environmental toxicants, incidence of degenerative diseases, and therapies from the epigenetic point of view. Arch Toxicol 2017; 91:2577-2597. [DOI: 10.1007/s00204-017-1979-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 05/04/2017] [Indexed: 01/12/2023]
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Bartolini D, Sancineto L, Fabro de Bem A, Tew KD, Santi C, Radi R, Toquato P, Galli F. Selenocompounds in Cancer Therapy: An Overview. Adv Cancer Res 2017; 136:259-302. [PMID: 29054421 DOI: 10.1016/bs.acr.2017.07.007] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
In vitro and in vivo experimental models clearly demonstrate the efficacy of Se compounds as anticancer agents, contingent upon chemical structures and concentrations of test molecules, as well as on the experimental model under investigation that together influence cellular availability of compounds, their molecular dynamics and mechanism of action. The latter includes direct and indirect redox effects on cellular targets by the activation and altered compartmentalization of molecular oxygen, and the interaction with protein thiols and Se proteins. As such, Se compounds interfere with the redox homeostasis and signaling of cancer cells to produce anticancer effects that include alterations in key regulatory elements of energy metabolism and cell cycle checkpoints that ultimately influence differentiation, proliferation, senescence, and death pathways. Cys-containing proteins and Se proteins involved in the response to Se compounds as sensors and transducers of anticancer signals, i.e., the pharmacoproteome of Se compounds, are described and include critical elements in the different phases of cancer onset and progression from initiation and escape of immune surveillance to tumor growth, angiogenesis, and metastasis. The efficacy and mode of action on these compounds vary depending on the inorganic and organic form of Se used as either supplement or pharmacological agent. In this regard, differences in experimental/clinical protocols provide options for either chemoprevention or therapy in different human cancers.
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Affiliation(s)
| | | | - Andreza Fabro de Bem
- Center of Biological Sciences (CCB), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Institute of Biological Sciences, University of Brasilia, Brasilia, Brazil
| | - Kenneth D Tew
- Medical University of South Carolina, Charleston, SC, United States
| | | | - Rafael Radi
- Center for Free Radical and Biomedical Research (CEINBIO), Universidad de la República, Montevideo, Uruguay
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Uzick M. Naturopathic Approaches. Integr Cancer Ther 2016. [DOI: 10.1177/1534735405279633] [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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Affiliation(s)
- Gordon A. Saxe
- Department of Family and Preventive Medicine University of California, San Diego School of Medicine Cancer Prevention and Control Program 9500 Gilman Drive, Dept. 0901 La Jolla, CA 92093-0901,
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35
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Biosynthesis of Se-methyl-seleno-l-cysteine in Basidiomycetes fungus Lentinula edodes (Berk.) Pegler. SPRINGERPLUS 2016; 5:733. [PMID: 27376001 PMCID: PMC4909690 DOI: 10.1186/s40064-016-2498-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/02/2016] [Indexed: 11/29/2022]
Abstract
Background The aim of the current study was to investigate whether the Basidiomycetes fungus Lentinula edodes can biosynthesize Se-methyl-seleno-l-cysteine, a seleno-amino acid with strong anticancer activity, and to optimize the culture conditions for its biosynthesis. We hypothesize that preparations obtained from Se-methyl-seleno-l-cysteine-enriched mycelia from this medicinal mushroom would possess stronger cancer-preventive properties than current preparations. Results By optimizing the concentration of selenium in the culture medium, we increased the mycelial concentration of Se-methyl-seleno-l-cysteine from essentially non-detectable levels to 120 µg/g dry weight. Significantly elevated levels of this amino acid also correlated with significant (twofold) inhibition of mycelial growth. Increases in the concentration of mycelial Se-methyl-seleno-l-cysteine appeared to be highly correlated with the enhanced biosynthesis of selenomethionine and total selenium content in mycelium. Conclusions We have demonstrated that in L. edodes, enhanced biosynthesis of this non-protein amino acid eliminates excess selenium.
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Gopalakrishna R, Gundimeda U, Zhou S, Zung K, Forell K, Holmgren A. Imbalance in Protein Thiol Redox Regulation and Cancer-Preventive Efficacy of Selenium. REACTIVE OXYGEN SPECIES (APEX, N.C.) 2016; 2:272-289. [PMID: 29795790 DOI: 10.20455/ros.2016.851] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although several experimental studies showed cancer-preventive efficacy of supplemental dietary selenium, human clinical trials questioned this efficacy. Identifying its molecular targets and mechanism is important in understanding this discrepancy. Methylselenol, the active metabolite of selenium, reacts with lipid hydroperoxides bound to protein kinase C (PKC) and is oxidized to methylseleninic acid (MSA). This locally generated MSA selectively inactivates PKC by oxidizing its critical cysteine sulfhydryls. The peroxidatic redox cycle occurring in this process may explain how extremely low concentrations of selenium catalytically modify specific membrane-bound proteins compartmentally separated from glutathione and selectively induce cytotoxicity in promoting cells. Mammalian thioredoxin reductase (TR) is itself a selenoenzyme with a catalytic selenocysteine residue. Together with thioredoxin (Trx), it catalyzes reduction of selenite and selenocystine by NADPH generating selenide which in the presence of oxygen redox cycles producing reactive oxygen species. Trx binds with high affinity to PKC and reverses PKC inactivation. Therefore, established tumor cells overexpressing TR and Trx may escape the cancer-preventive actions of selenium. This suggests that in some cases, certain selenoproteins may counteract selenometabolite actions. Lower concentrations of selenium readily inactivate antiapoptotic PKC isoenzymes e and a which have a cluster of vicinal thiols, thereby inducing apoptosis. Higher concentrations of selenium also inactivate proapoptotic enzymes such as proteolytically activated PKCd fragment, holo-PKCz, caspase-3, and c-Jun N-terminal kinase, which all have a limited number of critical cysteine residues and make tumor cells resistant to selenium-induced apoptosis. This may explain the intriguing U-shaped curve that is seen with dietary selenium intake and the extent of cancer prevention.
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Affiliation(s)
- Rayudu Gopalakrishna
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Usha Gundimeda
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Sarah Zhou
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Kristen Zung
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Kaitlyn Forell
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Arne Holmgren
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, 171 77 Stockholm, Sweden
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TAT-ODD-p53 enhances the radiosensitivity of hypoxic breast cancer cells by inhibiting Parkin-mediated mitophagy. Oncotarget 2016; 6:17417-29. [PMID: 26025927 PMCID: PMC4627318 DOI: 10.18632/oncotarget.4002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 05/06/2015] [Indexed: 12/25/2022] Open
Abstract
Radiation therapy has an important role in the treatment of breast cancer. Dysfunction p53 and hypoxia are typical biological characteristics of breast cancer that constitute barriers to the efficacy of radiotherapy. Mitophagy plays a protective role in cellular homeostasis under hypoxic conditions, while mitophagy is inhibited by p53 in normal cells. We explored the effects of a p53 fusion protein, TAT-ODD-p53, on the radiosensitivity of hypoxic breast cancer cells both in vitro and in vivo, as well as investigating the related molecular mechanisms. We found that selective accumulation of TAT-ODD-p53 occurred under hypoxic conditions and significantly increased tumor cell radiosensitivity both in vitro and in vivo. Mitophagy had an important role in maintaining hypoxia-induced radioresistance. Mitophagy was inhibited by TAT-ODD-p53 and this inhibition was suppressed by over-expression of Parkin in hypoxic irradiated breast cancer cells. In addition, mitophagy was induced by deletion of p53, with this effect being weakened by Parkin knockdown at a low oxygen tension. By interacting with Parkin, p53 inhibited the translocation of Parkin to the mitochondria, disrupting the protective mitophagy process. These results suggest that TAT-ODD-p53 has a significant and preferential radiosensitizing effect on hypoxic breast cancer cells by inhibition of Parkin-mediated mitophagy.
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Ramamoorthy V, Rubens M, Saxena A, Shehadeh N. Selenium and vitamin E for prostate cancer--justifications for the SELECT study. Asian Pac J Cancer Prev 2016; 16:2619-27. [PMID: 25854337 DOI: 10.7314/apjcp.2015.16.7.2619] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
There are several studies that relate oxidative damage as possible mechanism for many cancers. Many studies have also shown that anti-oxidants like selenium and vitamin E decrease the risk for prostate cancer. The main objective of the Selenium and Vitamin E Cancer Prevention Trial (SELECT) study was to look for the benefits of selenium and vitamin E supplementation on prostate cancer. The study had a large sample size, stringent experimental conditions, very long duration, standardized laboratories for biochemical analyses and other factors that contribute to high external validity. The SELECT study failed to show any significant risk reduction for prostate cancers ascribable to selenium and vitamin E supplementations. Because of these conflicting results, many researchers argue about the methods used, supplementations administered (selenium and vitamin E) and indicators used for assessing levels of supplementations. We reviewed many epidemiological studies, clinical trials, and pre-clinical studies. With corroborative evidences we justify that SELECT study has a sound methodology and rationale. In lieu of the contrary results of the select study, researchers should focus on the probable mechanisms for these contrary findings and continue their search for newer and effective agents for prevention of prostate cancer.
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Affiliation(s)
- Venkataraghavan Ramamoorthy
- Department of Dietetics and Nutrition, Robert Stempel College of Public Health and Social Work, Florida International University, Miami, USA E-mail :
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Mary TA, Shanthi K, Vimala K, Soundarapandian K. PEG functionalized selenium nanoparticles as a carrier of crocin to achieve anticancer synergism. RSC Adv 2016. [DOI: 10.1039/c5ra25109e] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Schematic representation of crocin extraction from saffron stigmas and possible mechanism of pH based crocin delivery system of PEG-SeNP induced apoptosis in lung cancer cell.
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Affiliation(s)
| | | | - Karuppaiya Vimala
- Proteomics and Molecular Cell Physiology Laboratory
- Department of Zoology
- Periyar University
- Salem-636 011
- India
| | - Kannan Soundarapandian
- Proteomics and Molecular Cell Physiology Laboratory
- Department of Zoology
- Periyar University
- Salem-636 011
- India
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40
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Amorim MM, Pereira JO, Monteiro KM, Ruiz AL, Carvalho JE, Pinheiro H, Pintado M. Antiulcer and antiproliferative properties of spent brewer's yeast peptide extracts for incorporation into foods. Food Funct 2016; 7:2331-7. [DOI: 10.1039/c6fo00030d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The main objective was to study the antiulcer and antiproliferative potential of yeast peptide extract for further incorporation into functional foods.
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Affiliation(s)
- Maria M. Amorim
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado
- Escola Superior de Biotecnologia
- Universidade Católica Portuguesa/Porto
- 4202-401 Porto
- Portugal
| | - Joana O. Pereira
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado
- Escola Superior de Biotecnologia
- Universidade Católica Portuguesa/Porto
- 4202-401 Porto
- Portugal
| | - Karin M. Monteiro
- Divisão de Farmacologia e Toxicologia
- Centro Pluridisciplinar de Pesquisas Químicas
- Biológicas e Agrícolas (CPQBA)
- UNICAMP
- Campinas
| | - Ana L. Ruiz
- Divisão de Farmacologia e Toxicologia
- Centro Pluridisciplinar de Pesquisas Químicas
- Biológicas e Agrícolas (CPQBA)
- UNICAMP
- Campinas
| | - João E. Carvalho
- Divisão de Farmacologia e Toxicologia
- Centro Pluridisciplinar de Pesquisas Químicas
- Biológicas e Agrícolas (CPQBA)
- UNICAMP
- Campinas
| | - Hélder Pinheiro
- Departamento de Farmacologia e Terapêutica da Faculdade de Medicina da Universidade do Porto
- 4200-319 Porto
- Portugal
| | - Manuela Pintado
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado
- Escola Superior de Biotecnologia
- Universidade Católica Portuguesa/Porto
- 4202-401 Porto
- Portugal
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Aufiero M, Sperger T, Tsang ASK, Schoenebeck F. Hoch effiziente C-SeCF3-Kupplung von Aryliodiden durch einen luftbeständigen zweikernigen PdI-Katalysator. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503388] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Aufiero M, Sperger T, Tsang ASK, Schoenebeck F. Highly Efficient C-SeCF3 Coupling of Aryl Iodides Enabled by an Air-Stable Dinuclear Pd(I) Catalyst. Angew Chem Int Ed Engl 2015; 54:10322-6. [PMID: 26118426 DOI: 10.1002/anie.201503388] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 11/07/2022]
Abstract
Building on our recent disclosure of catalysis at dinuclear Pd(I) sites, we herein report the application of this concept to the realization of the first catalytic method to convert aryl iodides into the corresponding ArSeCF3 compounds. Highly efficient C-SeCF3 coupling of a range of aryl iodides was achieved, enabled by an air-, moisture-, and thermally stable dinuclear Pd(I) catalyst. The novel SeCF3 -bridged dinuclear Pd(I) complex 3 was isolated, studied for its catalytic competence and shown to be recoverable. Experimental and computational data are presented in support of dinuclear Pd(I) catalysis.
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Affiliation(s)
- Marialuisa Aufiero
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany) http://www.schoenebeck.oc.rwth-aachen.de/,ETH Zürich, Laboratory for Organic Chemistry, Vladimir-Prelog-Weg 3, 8093 Zürich (Switzerland)
| | - Theresa Sperger
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany) http://www.schoenebeck.oc.rwth-aachen.de/
| | - Althea S-K Tsang
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany) http://www.schoenebeck.oc.rwth-aachen.de/
| | - Franziska Schoenebeck
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany) http://www.schoenebeck.oc.rwth-aachen.de/.
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Wang Q, Larese-Casanova P, Webster TJ. Inhibition of various gram-positive and gram-negative bacteria growth on selenium nanoparticle coated paper towels. Int J Nanomedicine 2015; 10:2885-94. [PMID: 25926733 PMCID: PMC4403699 DOI: 10.2147/ijn.s78466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
There are wide spread bacterial contamination issues on various paper products, such as paper towels hanging in sink splash zones or those used to clean surfaces, filter papers used in water and air purifying systems, and wrappings used in the food industry; such contamination may lead to the potential spread of bacteria and consequent severe health concerns. In this study, selenium nanoparticles were coated on normal paper towel surfaces through a quick precipitation method, introducing antibacterial properties to the paper towels in a healthy way. Their effectiveness at preventing biofilm formation was tested in bacterial assays involving Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus epidermidis. The results showed significant and continuous bacteria inhibition with about a 90% reduction from 24 to 72 hours for gram-positive bacteria including S. aureus and S. epidermidis. The selenium coated paper towels also showed significant inhibition of gram-negative bacteria like P. aeruginosa and E. coli growth at about 57% and 84%, respectively, after 72 hours of treatment. Therefore, this study established a promising selenium-based antibacterial strategy to prevent bacterial growth on paper products, which may lead to the avoidance of bacteria spreading and consequent severe health concerns.
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Affiliation(s)
- Qi Wang
- Department of Bioengineering, College of Engineering, Northeastern University, Boston, MA, USA
| | - Philip Larese-Casanova
- Department of Civil and Environmental Engineering, College of Engineering, Northeastern University, Boston, MA, USA
| | - Thomas J Webster
- Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA, USA ; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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Jablonska E, Vinceti M. Selenium and Human Health: Witnessing a Copernican Revolution? JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2015; 33:328-68. [PMID: 26074278 DOI: 10.1080/10590501.2015.1055163] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In humans, selenium was hypothesized to lower the risk of several chronic diseases, mainly due to the antioxidant activity of selenium-containing proteins. Recent epidemiologic and laboratory studies, however, are changing our perception of the biological effects of this nutritionally essential trace element. We reviewed the most recent epidemiologic and biochemical literature on selenium, synthesizing the findings from these studies into a unifying view. Randomized trials have shown that selenium did not protect against cancer and other chronic diseases, but even increased the risk of specific neoplasms such as advanced prostate cancer and skin cancer, in addition to type 2 diabetes. Biochemical studies indicate that selenium may exert a broad pattern of toxic effects at unexpectedly low concentrations. Furthermore, its upregulation of antioxidant proteins (selenium-dependent and selenium-independent) may be a manifestation of self-induced oxidative stress. In conclusion, toxic effects of selenium species occur at lower concentrations than previously believed. Those effects may include a large range of proteomic changes and adverse health effects in humans. Since the effects of environmental exposure to this element on human health still remain partially unknown, but are potentially serious, the toxicity of selenium exposure should be further investigated and considered as a public health priority.
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Affiliation(s)
- Ewa Jablonska
- a Department of Toxicology and Carcinogenesis , Nofer Institute of Occupational Medicine , Lodz , Poland
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Kenfield SA, Van Blarigan EL, DuPre N, Stampfer MJ, L Giovannucci E, Chan JM. Selenium supplementation and prostate cancer mortality. J Natl Cancer Inst 2014; 107:360. [PMID: 25505227 DOI: 10.1093/jnci/dju360] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Few studies have evaluated the relation between selenium supplementation after diagnosis and prostate cancer outcomes. METHODS We prospectively followed 4459 men initially diagnosed with nonmetastatic prostate cancer in the Health Professionals Follow-Up Study from 1988 through 2010 and examined whether selenium supplement use (from selenium-specific supplements and multivitamins) after diagnosis was associated with risk of biochemical recurrence, prostate cancer mortality, and, secondarily, cardiovascular disease mortality and overall mortality, using Cox proportional hazards models. All P values were from two-sided tests. RESULTS We documented 965 deaths, 226 (23.4%) because of prostate cancer and 267 (27.7%) because of cardiovascular disease, during a median follow-up of 8.9 years. In the biochemical recurrence analysis, we documented 762 recurrences during a median follow-up of 7.8 years. Crude rates per 1000 person-years for prostate cancer death were 5.6 among selenium nonusers and 10.5 among men who consumed 140 or more μg/day. Crude rates per 1000 person-years were 28.2 vs 23.5 for all-cause mortality and 28.4 vs 29.3 for biochemical recurrence, for nonuse vs highest-dose categories, respectively. In multivariable analyses, men who consumed 1 to 24 μg/day, 25 to 139 μg/day, and 140 or more μg/day of supplemental selenium had a 1.18 (95% confidence interval [CI] = 0.73 to 1.91), 1.33 (95% CI = 0.77 to 2.30), and 2.60-fold (95% CI = 1.44 to 4.70) greater risk of prostate cancer mortality compared with nonusers, respectively, P trend = .001. There was no statistically significant association between selenium supplement use and biochemical recurrence, cardiovascular disease mortality, or overall mortality. CONCLUSION Selenium supplementation of 140 or more μg/day after diagnosis of nonmetastatic prostate cancer may increase risk of prostate cancer mortality. Caution is warranted regarding usage of such supplements among men with prostate cancer.
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Affiliation(s)
- Stacey A Kenfield
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG).
| | - Erin L Van Blarigan
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG)
| | - Natalie DuPre
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG)
| | - Meir J Stampfer
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG)
| | - Edward L Giovannucci
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG)
| | - June M Chan
- Department of Urology, University of California, San Francisco, San Francisco, CA (ELVB, SAK, JMC); Department of Epidemiology, Harvard School of Public Health, Boston, MA (SAK, ND, MJS, EG); Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA (ELVB, JMC); Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS, EG); Department of Nutrition, Harvard School of Public Health, Boston, MA (MJS, EG)
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Fernandes AP, Gandin V. Selenium compounds as therapeutic agents in cancer. Biochim Biophys Acta Gen Subj 2014; 1850:1642-60. [PMID: 25459512 DOI: 10.1016/j.bbagen.2014.10.008] [Citation(s) in RCA: 272] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 10/06/2014] [Accepted: 10/08/2014] [Indexed: 11/24/2022]
Abstract
BACKGROUND With cancer cells encompassing consistently higher production of reactive oxygen species (ROS) and with an induced antioxidant defense to counteract the increased basal ROS production, tumors have a limited reserve capacity resulting in an increased vulnerability of some cancer cells to ROS. Based on this, oxidative stress has been recognized as a tumor-specific target for the rational design of new anticancer agents. Among redox modulating compounds, selenium compounds have gained substantial attention due to their promising chemotherapeutic potential. SCOPE OF REVIEW This review aims in summarizing and providing the recent developments of our understanding of the molecular mechanisms that underlie the potential anticancer effects of selenium compounds. MAJOR CONCLUSIONS It is well established that selenium at higher doses readily can turn into a prooxidant and thereby exert its potential anticancer properties. However, the biological activity of selenium compounds and the mechanism behind these effects are highly dependent on its speciation and the specific metabolic pathways of cells and tissues. Conversely, the chemical properties and the main molecular mechanisms of the most relevant inorganic and organic selenium compounds as well as selenium-based nanoparticles must be taken into account and are discussed herein. GENERAL SIGNIFICANCE Elucidating and deepening our mechanistic knowledge of selenium compounds will help in designing and optimizing compounds with more specific antitumor properties for possible future application of selenium compounds in the treatment of cancer. This article is part of a Special Issue entitled Redox regulation of differentiation and de-differentiation.
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Affiliation(s)
- Aristi P Fernandes
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
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Hazane-Puch F, Champelovier P, Arnaud J, Trocmé C, Garrel C, Faure P, Laporte F. Six-day selenium supplementation led to either UVA-photoprotection or toxic effects in human fibroblasts depending on the chemical form and dose of Se. Metallomics 2014; 6:1683-92. [DOI: 10.1039/c4mt00040d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Warrington JM, Kim JJM, Stahel P, Cieslar SRL, Moorehead RA, Coomber BL, Corredig M, Cant JP. Selenized milk casein in the diet of BALB/c nude mice reduces growth of intramammary MCF-7 tumors. BMC Cancer 2013; 13:492. [PMID: 24152862 PMCID: PMC4015776 DOI: 10.1186/1471-2407-13-492] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 10/08/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dietary selenium has the potential to reduce growth of mammary tumors. Increasing the Se content of cows' milk proteins is a potentially effective means to increase Se intake in humans. We investigate the effects of selenized milk protein on human mammary tumor progression in immunodeficient BALB/c nude mice. METHODS Four isonitrogenous diets with selenium levels of 0.16, 0.51, 0.85 and 1.15 ppm were formulated by mixing low- and high-selenium milk casein isolates with a rodent premix. MCF-7 cells were inoculated into the mammary fat pad of female BALB/c nude mice implanted with slow-release 17 β-estradiol pellets. Mice with palpable tumors were randomly assigned to one of the four diets for 10 weeks, during which time weekly tumor caliper measurements were conducted. Individual growth curves were fit with the Gompertz equation. Apoptotic cells and Bcl-2, Bax, and Cyclin D1 protein levels in tumors were determined. RESULTS There was a linear decrease in mean tumor volume at 70 days with increasing Se intake (P < 0.05), where final tumor volume decreased 35% between 0.16 and 1.15 ppm Se. There was a linear decrease in mean predicted tumor volume at 56, 63 and 70 days, and the number of tumors with a final volume above 500 mm3, with increasing Se intake (P < 0.05). This tumor volume effect was associated with a decrease in the proportion of tumors with a maximum growth rate above 0.03 day-1. The predicted maximum volume of tumors (Vmax) and the number of tumors with a large Vmax, were not affected by Se-casein. Final tumor mass, Bcl-2, Bax, and Cyclin D1 protein levels in tumors were not significantly affected by Se-casein. There was a significantly higher number of apoptotic cells in high-Se tumors as compared to low-Se tumors. CONCLUSIONS Taken together, these results suggest that turnover of cells in the tumor, but not its nutrient supply, were affected by dairy Se. We have shown that 1.1 ppm dietary Se from selenized casein can effectively reduce tumor progression in an MCF-7 xenograft breast cancer model. These results show promise for selenized milk protein as an effective supplement during chemotherapy.
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Affiliation(s)
| | | | | | | | | | | | | | - John P Cant
- Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, ON N1G 2W1, Canada.
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Gonçalves AC, Barbosa-Ribeiro A, Alves V, Silva T, Sarmento-Ribeiro AB. Selenium compounds induced ROS-dependent apoptosis in myelodysplasia cells. Biol Trace Elem Res 2013; 154:440-7. [PMID: 23900644 DOI: 10.1007/s12011-013-9749-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 07/01/2013] [Indexed: 02/05/2023]
Abstract
Several authors have demonstrated the chemoprotective and anti-carcinogenic role of selenium. However, the therapeutic potential of selenium in myelodysplastic syndrome (MDS) as single agent and as co-adjuvant of the current therapies has not been previously studied. Sodium selenite and selenomethionine, alone and in combination with cytarabine, induce a decrease in cell viability in a time-, dose- and administration-dependent manner inducing cell death by apoptosis in F36P cells (MDS cell line). These compounds increased superoxide production and induced mitochondrial membrane depolarization. The increase in BAX/BCL-2 ratio and in the activated caspase 3 expression levels, the decrease in mitochondria membrane potential, as well as the increase in superoxide production, supports the mitochondria contribution on selenium-induced apoptosis. These findings suggest that selenium may offer a new therapeutic approach in myelodysplastic syndrome in monotherapy and/or as co-adjuvant therapy to conventional anti-carcinogenic.
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Affiliation(s)
- Ana Cristina Gonçalves
- Applied Molecular Biology, University Clinic of Haematology and Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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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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