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Frydrych A, Frankowski M, Jurowski K. The toxicological analysis of problematic and sophisticated elements (Ni, Cr, and Se) in Food for Special Medical Purposes (FSMP) using in pharmacotherapy and clinical nutrition for oncological patients available in Polish pharmacies. Food Chem Toxicol 2024; 192:114930. [PMID: 39147355 DOI: 10.1016/j.fct.2024.114930] [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: 07/04/2024] [Revised: 07/31/2024] [Accepted: 08/11/2024] [Indexed: 08/17/2024]
Abstract
This study focuses on FSMPs for oncologic patients, specifically analyzing the toxicological profiles of nickel (Ni), chromium (Cr), and selenium (Se) within these products available in Polish pharmacies. The presence of these elements was quantified using inductively coupled plasma mass spectrometry (ICP-MS). Results indicated variations in the concentrations of Ni, Cr, and Se across different FSMP samples, with some products exceeding the acceptable limits set by regulatory guidelines. The study highlights the potential health risks associated with nickel exposure, including dermatitis and carcinogenesis, and the complex roles of chromium and selenium, which can be both beneficial and harmful depending on their levels. Our findings reveal significant variability in the elemental content across different FSMP products, i.e.: Ni: 0.155-25.488 μg/portion, Cr: 0.076-28.726 μg/portion and Se: 0.083-20.304 μg/portion). Notably, selenium levels in FSMPs showed considerable discrepancies compared to manufacturers' declarations, averaging only about 20% of the stated values. Regulatory assessments based on the Acceptable Daily Intake (ADI) and Permitted Daily Exposure (PDE) descriptors indicated that the estimated weekly intake of Ni, Cr, and Se from these FSMPs did not exceed the provisional tolerable weekly intake (PTWI) values. However, the highest Ni content was 30.58% of the PTWI, raising concerns about potential health risks, including dermatitis and carcinogenesis. The results for Cr underscored the necessity for careful monitoring due to its potential toxic effects. Selenium, despite its essential role, showed levels inadequate to meet the Recommended Dietary Allowance (RDA), potentially impacting its intended health benefits.
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Affiliation(s)
- Adrian Frydrych
- Laboratory of Innovative Toxicological Research and Analyzes, Institute of Medical Sciences, Medical College, Rzeszów University, Al. mjr. W. Kopisto 2a, 35-959, Rzeszów, Poland
| | - Marcin Frankowski
- Department of Analytical and Environmental Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Kamil Jurowski
- Laboratory of Innovative Toxicological Research and Analyzes, Institute of Medical Sciences, Medical College, Rzeszów University, Al. mjr. W. Kopisto 2a, 35-959, Rzeszów, Poland; Department of Regulatory and Forensic Toxicology, Institute of Medical Expertises in Łódź, ul. Aleksandrowska 67/93, 91-205, Łódź, Poland.
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Ge S, Zhao J, Yao J, Fu H, Tian Y, Shan Y, Sun M, Feng J, Dong J, Liao L. The association between serum selenium levels and pathological features of papillary thyroid cancer in 284 patients. Front Endocrinol (Lausanne) 2023; 14:1242250. [PMID: 38027150 PMCID: PMC10656612 DOI: 10.3389/fendo.2023.1242250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
Objective The relationship between serum selenium levels and papillary thyroid cancer (PTC), especially the pathological features, still remains controversial. We conducted this study to investigate the relationship between serum selenium levels and PTC in a Chinese population. Methods Cross-sectional data of 284 patients with PTC were collected from the First Affiliated Hospital of Shandong First Medical University. The general clinical characteristics, serum selenium levels, and tumor pathological features were described in PTC. The association between serum selenium levels and pathological features in PTC was analyzed using SPSS 26.0 statistical software. Results Our results showed that the median serum selenium level was 79.15 μg/L (IQR: 71.00 - 86.98 μg/L) in PTC patients. Serum selenium levels were lower in females than males (p = 0.035). Serum selenium levels were negatively correlated with the number of lymph node metastases (p = 0.048). High serum selenium (OR = 0.397, 95%CI: 0.217 - 0.725) and diastolic blood pressure (OR = 1.028, 95%CI: 1.005 - 1.051) were related factors for the incidence of bilateral tumors. High serum selenium (OR = 0.320, 95%CI: 0.166 - 0.617) and diastolic blood pressure (OR = 1.066, 95%CI: 1.031 - 1.103) were related factors for tumor multifocal incidence. Conclusions The serum selenium levels of PTC patients in females were lower than males. High serum selenium levels might be a protective factor in PTC patients. Further research is necessary to better understand the influence of selenium on PTC progression.
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Affiliation(s)
- Shenghui Ge
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
| | - Junyu Zhao
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
| | - Jinming Yao
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
| | - Hang Fu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Ji-nan, China
| | - Yutian Tian
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
| | - Yuanyuan Shan
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
| | - Mengli Sun
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Ji-nan, China
| | - Jing Feng
- Division of Endocrinology, Department of Internal Medicine, Qilu Hospital of Shandong University, Ji-nan, China
| | - Jianjun Dong
- Division of Endocrinology, Department of Internal Medicine, Qilu Hospital of Shandong University, Ji-nan, China
| | - Lin Liao
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Ji-nan, China
- Department of Endocrinology and Metabology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, Shandong Institute of Nephrology, Ji-nan, China
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Hood KM, Sweeney E, Ilie G, Keltie E, Kim JS. Toenail arsenic species and metallome profiles associated with breast, cervical, prostate, and skin cancer prevalence in the Atlantic Partnership for Tomorrow's Health cohort. Front Public Health 2023; 11:1148283. [PMID: 37397723 PMCID: PMC10308375 DOI: 10.3389/fpubh.2023.1148283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/28/2023] [Indexed: 07/04/2023] Open
Abstract
Introduction Chronic exposure to arsenic through drinking water has been linked to several cancers. The metabolism of arsenic is thought to play a key role in arsenic-related carcinogenesis as metabolites of varying toxicity are produced and either stored in or excreted from the body. Atlantic Canada has the highest age-standardized incidence rates of all cancers in the country. This may be due to its high levels of environmental arsenic and the prevalence of unregulated private wells for water consumption. Here, we aimed to characterize the profiles of arsenic species and metallome in the toenails of four cancer groups, compare them to healthy participants (N = 338), and assess potential associations between the profiles with cancer prevalence. Methods This study employed a case-control design. Toenail samples and questionnaire data from cases (breast, cervical, prostate, and skin cancers) and controls were sourced from the Atlantic Partnership for Tomorrow's Health (PATH) cohort study. The levels of arsenic species were measured using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) paired with High Performance Liquid Chromatography (HPLC) and total concentrations of metallome (23 metals) were determined by ICP-MS separately. Multivariate analyses were conducted to compare cases with controls within each cancer group. Results Arsenic speciation profiles varied by cancer type and were significantly different between cases and controls in the breast (p = 0.0330), cervical (p = 0.0228), and skin (p = 0.0228) cancer groups. In addition, the profiles of metallome (nine metals) were significantly differentiated in the prostate (p = 0.0244) and skin (p = 0.0321) cancer groups, with higher zinc concentrations among cases compared to controls. Conclusion History of cancer diagnosis was associated with specific profiles of arsenic species and metallome. Our results indicate that arsenic methylation and zinc levels, as measured in toenails, may be an important biomarker for cancer prevalence. Further research is needed to use toenails as a prognostic measure of arsenic-and other metal-induced cancer.
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Affiliation(s)
- Kalli M. Hood
- Health and Environments Research Centre (HERC) Laboratory, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Department of Community Health & Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Ellen Sweeney
- Department of Community Health & Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Atlantic Partnership for Tomorrow’s Health (PATH), Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Gabriela Ilie
- Department of Community Health & Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Erin Keltie
- Health and Environments Research Centre (HERC) Laboratory, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Department of Community Health & Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Jong Sung Kim
- Health and Environments Research Centre (HERC) Laboratory, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Department of Community Health & Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Atlantic Partnership for Tomorrow’s Health (PATH), Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, Iowa City, IA, United States
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Selenomethionine-Dominated Selenium-Enriched Peanut Protein Ameliorates Alcohol-Induced Liver Disease in Mice by Suppressing Oxidative Stress. Foods 2021; 10:foods10122979. [PMID: 34945529 PMCID: PMC8700997 DOI: 10.3390/foods10122979] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/18/2021] [Accepted: 12/01/2021] [Indexed: 01/11/2023] Open
Abstract
Numerous natural compounds are considered as potential therapeutic agents against alcohol-induced liver disease (ALD). Research shows that selenium (Se) has a variety of bioactivities, including liver protecting ability. The present study based on in vitro cell culture models and in vivo mouse models was aimed at examining the contribution of selenomethionine (SeMet)-dominated Se-enriched peanut protein (SePP) to liver protection. SeMet and especially SePP reversed cell viability and cell death, inhibited ethanol induced CYP2E1 activation, decreased reactive oxygen species level, and restored GSH level. Hence, SeMet-dominated SePP alleviates alcohol-induced AML-12 cytotoxicity by suppressing oxidative stress. The p38-dependent mechanism was found to be responsible for SePP-induced Nrf-2 activation. Furthermore, supplementation with SePP and SeMet regulated lipid metabolism and reduced oxidative stress, minimizing liver damage in mice. Selenomethionine-dominated SePP possesses potential therapeutic properties and can be used to treat ALD through the suppression of oxidative stress.
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Lossow K, Schwarz M, Kipp AP. Are trace element concentrations suitable biomarkers for the diagnosis of cancer? Redox Biol 2021; 42:101900. [PMID: 33642247 PMCID: PMC8113050 DOI: 10.1016/j.redox.2021.101900] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/04/2021] [Accepted: 02/12/2021] [Indexed: 12/24/2022] Open
Abstract
Despite advances in cancer research, cancer is still one of the leading causes of death worldwide. An early diagnosis substantially increases the survival rate and treatment success. Thus, it is important to establish biomarkers which could reliably identify cancer patients. As cancer is associated with changes in the systemic trace element status and distribution, serum concentrations of selenium, iron, copper, and zinc could contribute to an early diagnosis. To test this hypothesis, case control studies measuring trace elements in cancer patients vs. matched controls were selected and discussed focusing on lung, prostate, breast, and colorectal cancer. Overall, cancer patients had elevated serum copper and diminished zinc levels, while selenium and iron did not show consistent changes for all four cancer types. Within the tumor tissue, mainly copper and selenium are accumulating. Whether these concentrations also predict the survival probability of cancer patients needs to be further investigated.
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Affiliation(s)
- Kristina Lossow
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Jena, 07743, Germany; TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Maria Schwarz
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Jena, 07743, Germany; TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Anna P Kipp
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Jena, 07743, Germany; TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany.
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Hu W, Zhao C, Hu H, Yin S. Food Sources of Selenium and Its Relationship with Chronic Diseases. Nutrients 2021; 13:nu13051739. [PMID: 34065478 PMCID: PMC8160805 DOI: 10.3390/nu13051739] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/18/2021] [Accepted: 05/18/2021] [Indexed: 12/16/2022] Open
Abstract
Selenium (Se) is an essential micronutrient for mammals, and its deficiency seriously threatens human health. A series of biofortification strategies have been developed to produce Se-enriched foods for combating Se deficiency. Although there have been some inconsistent results, extensive evidence has suggested that Se supplementation is beneficial for preventing and treating several chronic diseases. Understanding the association between Se and chronic diseases is essential for guiding clinical practice, developing effective public health policies, and ultimately counteracting health issues associated with Se deficiency. The current review will discuss the food sources of Se, biofortification strategies, metabolism and biological activities, clinical disorders and dietary reference intakes, as well as the relationship between Se and health outcomes, especially cardiovascular disease, diabetes, chronic inflammation, cancer, and fertility. Additionally, some concepts were proposed, there is a non-linear U-shaped dose-responsive relationship between Se status and health effects: subjects with a low baseline Se status can benefit from Se supplementation, while Se supplementation in populations with an adequate or high status may potentially increase the risk of some diseases. In addition, at supra-nutritional levels, methylated Se compounds exerted more promising cancer chemo-preventive efficacy in preclinical trials.
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Xie M, Sun X, Li P, Shen X, Fang Y. Selenium in cereals: Insight into species of the element from total amount. Compr Rev Food Sci Food Saf 2021; 20:2914-2940. [PMID: 33836112 DOI: 10.1111/1541-4337.12748] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/24/2021] [Accepted: 03/09/2021] [Indexed: 02/07/2023]
Abstract
Selenium (Se) is a trace mineral micronutrient essential for human health. The diet is the main source of Se intake. Se-deficiency is associated with many diseases, and up to 1 billion people suffer from Se-deficiency worldwide. Cereals are considered a good choice for Se intake due to their daily consumption as staple foods. Much attention has been paid to the contents of Se in cereals and other foods. Se-enriched cereals are produced by biofortification. Notably, the gap between the nutritional and toxic levels of Se is fairly narrow. The chemical structures of Se compounds, rather than their total contents, contribute to the bioavailability, bioactivity, and toxicity of Se. Organic Se species show better bioavailability, higher nutritional value, and less toxicity than inorganic species. In this paper, we reviewed the total content of Se in cereals, Se speciation methods, and the biological effects of Se species on human health. Selenomethionine (SeMet) is generally the most prevalent and important Se species in cereal grains. In conclusion, Se species should be considered in addition to the total Se content when evaluating the nutritional and toxic values of foods such as cereals.
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Affiliation(s)
- Minhao Xie
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Xinyang Sun
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China.,Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Peng Li
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Xinchun Shen
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Yong Fang
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
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Wei D, Yu Y, Zhang X, Wang Y, Chen H, Zhao Y, Wang F, Rong G, Wang W, Kang X, Cai J, Wang Z, Yin JY, Hanif M, Sun Y, Zha G, Li L, Nie G, Xiao H. Breaking the Intracellular Redox Balance with Diselenium Nanoparticles for Maximizing Chemotherapy Efficacy on Patient-Derived Xenograft Models. ACS NANO 2020; 14:16984-16996. [PMID: 33283501 DOI: 10.1021/acsnano.0c06190] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Excessive oxidative stress in cancer cells can induce cancer cell death. Anticancer activity and drug resistance of chemotherapy are closely related to the redox state of tumor cells. Herein, five lipophilic Pt(IV) prodrugs were synthesized on the basis of the most widely used anticancer drug cisplatin, whose anticancer efficacy and drug resistance are closely related to the intracellular redox state. Subsequently, a series of cisplatin-sensitive and drug-resistant cell lines as well as three patient-derived primary ovarian cancer cells have been selected to screen those prodrugs. To verify if the disruption of redox balance can be combined with these Pt(IV) prodrugs, we then synthesized a polymer with a diselenium bond in the main chain for encapsulating the most effective prodrug to form nanoparticles (NP(Se)s). NP(Se)s can efficiently break the redox balance via simultaneously depleting GSH and augmenting ROS, thereby achieving a synergistic effect with cisplatin. In addition, genome-wide analysis via RNA-seq was employed to provide a comprehensive understanding of the changes in transcriptome and the alterations in redox-related pathways in cells treated with NP(Se)s and cisplatin. Thereafter, patient-derived xenograft models of hepatic carcinoma (PDXHCC) and multidrug-resistant lung cancer (PDXMDR) were established to evaluate the therapeutic effect of NP(Se)s, and a significant antitumor effect was achieved on both models with NP(Se)s. Overall, this study provides a promising strategy to break the redox balance for maximizing the efficacy of platinum-based cancer therapy.
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Affiliation(s)
- Dengshuai Wei
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingjie Yu
- Institute of Translational Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen 518039, China
| | - Xingcai Zhang
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
- School of Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yongheng Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hao Chen
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yao Zhao
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, National Centre for Mass Spectrometry in Beijing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fuyi Wang
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, National Centre for Mass Spectrometry in Beijing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Guanghua Rong
- Department of Oncology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Wenwen Wang
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiang Kang
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jing Cai
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zehua Wang
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ji-Ye Yin
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University; Institute of Clinical Pharmacology, Central South University; Hunan Key Laboratory of Pharmacogenetics, Changsha 410078, China
| | - Muhammad Hanif
- School of Chemical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Yongbing Sun
- Division of Pharmaceutics, National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Gaofeng Zha
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institute, Hong Kong 00852, China
| | - Linxian Li
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institute, Hong Kong 00852, China
| | - Guohui Nie
- Institute of Translational Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen 518039, China
| | - Haihua Xiao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Alcântara DB, Nascimento RF, Lopes GS, Grinberg P. Evaluation of different strategies for determination of selenomethionine (SeMet) in selenized yeast by asymmetrical flow field flow fractionation coupled to inductively coupled plasma mass spectrometry (AF4-ICP-MS). ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3351-3360. [PMID: 32930222 DOI: 10.1039/d0ay00658k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This manuscript exemplifies the prospective use of asymmetrical flow field flow fractionation (AF4) coupled to inductively coupled plasma mass spectrometry (ICP-MS) as a simple tool for chemical speciation of selenomethionine (SeMet) in selenized yeast. Several popular sample preparation methods were evaluated for their suitability to determine selenomethionine (SeMet) in selenized yeast by AF4-ICP-MS. These included water, methanesulfonic acid (MSA), formic acid (FA) and alkaline extractions. Alkaline extraction (using sodium dodecyl sulfate buffer) provided the best recovery/determination conditions for SeMet based on analysis of NRC certified reference material (CRM) SELM-1 since it minimized hydrolysis of the protein peptide bonds optimally required for the AF4 separation. The analytical performance of three different AF4 membranes (5, 10 and 500 kDa regenerated cellulose) was also evaluated. No significant difference in the recovery of SeMet was observed when using 5 and 10 kDa RC membranes, whereas the 500 kDa membrane resulted in a significant loss. The proposed method presents appropriate instrument and intra-assay precisions of 4.4-9.2% and 3.8% RSD, respectively, a detection limit of 0.49 μg L-1 SeMet as Se and good linearity with correlation coefficients (R) between 0.996 - 0.999. This is the first report of use of AF4-ICP-MS for species specific quantitation of SeMet in selenized yeast demonstrating its efficient use as an alternative method to other traditional chromatographic techniques.
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Affiliation(s)
- Daniel B Alcântara
- Chemical Metrology, NRC Metrology, National Research Council of Canada, Ottawa, Canada.
- Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará (UFC), 60455-760 Fortaleza, CE, Brazil
- Laboratório de Análise de Traços (LAT), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará (UFC), 60455-760 Fortaleza, CE, Brazil
| | - Ronaldo F Nascimento
- Laboratório de Análise de Traços (LAT), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará (UFC), 60455-760 Fortaleza, CE, Brazil
| | - Gisele S Lopes
- Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará (UFC), 60455-760 Fortaleza, CE, Brazil
| | - Patricia Grinberg
- Chemical Metrology, NRC Metrology, National Research Council of Canada, Ottawa, Canada.
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Yan L, Nielsen FH, Sundaram S, Cao J. Dietary Selenium Supplementation Does Not Attenuate Mammary Tumorigenesis-Mediated Bone Loss in Male MMTV-PyMT Mice. Biol Trace Elem Res 2020; 194:221-227. [PMID: 31187394 DOI: 10.1007/s12011-019-01767-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 05/29/2019] [Indexed: 11/25/2022]
Abstract
Bone wasting occurs during the progression of breast cancer and contributes to breast cancer mortality. We evaluated the effect of methylseleninic acid (MSeA), an anti-carcinogenic form of selenium, on bone microstructural changes in the presence of mammary tumors in a male breast cancer model of mouse mammary tumor virus-polyomavirus middle T-antigen (MMTV-PyMT). In this study, we performed microcomputed tomographic analysis of femurs and vertebrae collected from a study showing that dietary supplementation with MSeA reduces mammary tumorigenesis in male mice. Compared to age-matched, non-tumor-bearing mice (MMTV-PyMT negative), the presence of mammary tumors significantly reduced the bone volume fraction, trabecular thickness, and bone mineral density while it increased the structure model index in femurs, but not in vertebrae. Moreover, mammary tumorigenesis decreased plasma concentrations of osteocalcin. Supplementation with MSeA did not affect these changes in MMTV-PyMT mice. In conclusion, mammary tumorigenesis caused bone loss in MMTV-PyMT mice. However, dietary supplementation with MSeA did not attenuate mammary tumor-associated bone loss in this model of male breast cancer.
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Affiliation(s)
- Lin Yan
- U.S. Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND, 58202, USA.
| | - Forrest H Nielsen
- U.S. Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND, 58202, USA
| | - Sneha Sundaram
- U.S. Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND, 58202, USA
| | - Jay Cao
- U.S. Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, 2420 2nd Avenue North, Grand Forks, ND, 58202, USA
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Obrador E, Liu-Smith F, Dellinger RW, Salvador R, Meyskens FL, Estrela JM. Oxidative stress and antioxidants in the pathophysiology of malignant melanoma. Biol Chem 2019; 400:589-612. [PMID: 30352021 DOI: 10.1515/hsz-2018-0327] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 10/09/2018] [Indexed: 02/07/2023]
Abstract
The high number of somatic mutations in the melanoma genome associated with cumulative ultra violet (UV) exposure has rendered it one of the most difficult of cancers to treat. With new treatment approaches based on targeted and immune therapies, drug resistance has appeared as a consistent problem. Redox biology, including reactive oxygen and nitrogen species (ROS and RNS), plays a central role in all aspects of melanoma pathophysiology, from initiation to progression and to metastatic cells. The involvement of melanin production and UV radiation in ROS/RNS generation has rendered the melanocytic lineage a unique system for studying redox biology. Overall, an elevated oxidative status has been associated with melanoma, thus much effort has been expended to prevent or treat melanoma using antioxidants which are expected to counteract oxidative stress. The consequence of this redox-rebalance seems to be two-fold: on the one hand, cells may behave less aggressively or even undergo apoptosis; on the other hand, cells may survive better after being disseminated into the circulating system or after drug treatment, thus resulting in metastasis promotion or further drug resistance. In this review we summarize the current understanding of redox signaling in melanoma at cellular and systemic levels and discuss the experimental and potential clinic use of antioxidants and new epigenetic redox modifiers.
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Affiliation(s)
- Elena Obrador
- Department of Phisiology, University of Valencia, 46010 Valencia, Spain
| | - Feng Liu-Smith
- Department of Epdemiology, Department of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, CA 92697, USA.,Department of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, CA 92697, USA
| | | | - Rosario Salvador
- Department of Phisiology, University of Valencia, 46010 Valencia, Spain
| | - Frank L Meyskens
- Department of Epdemiology, Department of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, CA 92697, USA.,Department of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, CA 92697, USA.,Department of Biological Chemistry, Chao Family Comprehensive Cancer Center, University of California, Irvine, CA 92697, USA
| | - José M Estrela
- Department of Phisiology, University of Valencia, 46010 Valencia, Spain
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12
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Pietrzak S, Wójcik J, Scott RJ, Kashyap A, Grodzki T, Baszuk P, Bielewicz M, Marciniak W, Wójcik N, Dębniak T, Masojć B, Pieróg J, Cybulski C, Gronwald J, Wojtyś M, Kubisa B, Sukiennicki G, Deptuła J, Waloszczyk P, Jakubowska A, Lubiński J, Lener MR. Influence of the selenium level on overall survival in lung cancer. J Trace Elem Med Biol 2019; 56:46-51. [PMID: 31442953 DOI: 10.1016/j.jtemb.2019.07.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/25/2019] [Accepted: 07/25/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Although the results of studies in populations with low selenium status indicate an inverse correlation between body selenium levels and the risk of the lung cancer, the effect of this microelement on survival has not been studied. MATERIALS AND METHODS We performed a prospective study of 302 patients diagnosed with lung cancer in Szczecin, Poland. Selenium concentration in serum was measured at the time of diagnosis and before treatment. All patients were followed for a maximum of 80 months or until death. Vital status was obtained from the Polish National Death Registry. RESULTS Using Cox proportional hazard analysis, performed for all individuals with lung cancer, the hazard ratio (HR) for death from all causes was 1.25 (95% CI: 0.86-1.83, P = 0.99) for patients in the lowest tertile compared to those in the highest tertile of serum selenium levels. Among the patients with stage I disease this relationship was significant (HR-2.73; P = 0.01) for selenium level in tertile 1 (<57 μg/L) compared to tertile 3 (>69 μg/L, reference). The 80 months crude survival after diagnosis was 79.5% (95% CI: 68.5-92.4%) for individuals in the highest tertile and 58.1% (95% CI: 45.1-74.9%) for individuals in the lowest tertile with stage I lung cancer. CONCLUSION These results suggest that in patients undergoing treatment for stage I lung cancer, serum selenium levels at the time of diagnosis (>69 μg/L) may be associated with improved overall survival.
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Affiliation(s)
- Sandra Pietrzak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Janusz Wójcik
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Rodney J Scott
- Medical Genetics, Hunter Medical Research Institute; Priority Research Centre for Cancer Research, Innovation and Translation, School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle; Pathology North, John Hunter Hospital, Cnr King and Auckland Streets, Newcastle, NSW, 2300, Australia
| | - Aniruddh Kashyap
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Tomasz Grodzki
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Piotr Baszuk
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Michał Bielewicz
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Wojciech Marciniak
- Read-Gene, Grzepnica, ul. Alabastrowa 8, 72-003, Dobra (Szczecińska), Poland
| | - Norbert Wójcik
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Tadeusz Dębniak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Bartłomiej Masojć
- Radiation Oncology Department, West Pomeranian Oncology Center, ul. Strzałowska 22, 71-730, Szczecin, Poland
| | - Jarosław Pieróg
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Cezary Cybulski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jacek Gronwald
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Małgorzata Wojtyś
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Bartosz Kubisa
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Grzegorz Sukiennicki
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jakub Deptuła
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Piotr Waloszczyk
- Independent Laboratory of Pathology, Zdunomed, ul. Energetyków 2, 70-656, Szczecin, Poland
| | - Anna Jakubowska
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jan Lubiński
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland; Read-Gene, Grzepnica, ul. Alabastrowa 8, 72-003, Dobra (Szczecińska), Poland
| | - Marcin R Lener
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland.
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Products of Sulfide/Selenite Interaction Possess Antioxidant Properties, Scavenge Superoxide-Derived Radicals, React with DNA, and Modulate Blood Pressure and Tension of Isolated Thoracic Aorta. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9847650. [PMID: 31885828 PMCID: PMC6899273 DOI: 10.1155/2019/9847650] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/12/2019] [Indexed: 12/29/2022]
Abstract
Selenium (Se), an essential trace element, and hydrogen sulfide (H2S), an endogenously produced signalling molecule, affect many physiological and pathological processes. However, the biological effects of their mutual interaction have not yet been investigated. Herein, we have studied the biological and antioxidant effects of the products of the H2S (Na2S)/selenite (Na2SeO3) interaction. As detected by the UV-VIS and EPR spectroscopy, the product(s) of the H2S-Na2SeO3 and H2S-SeCl4 interaction scavenged superoxide-derived radicals and reduced ·cPTIO radical depending on the molar ratio and the preincubation time of the applied interaction mixture. The results confirmed that the transient species are formed rapidly during the interaction and exhibit a noteworthy biological activity. In contrast to H2S or selenite acting on their own, the H2S/selenite mixture cleaved DNA in a bell-shaped manner. Interestingly, selenite protected DNA from the cleavage induced by the products of H2S/H2O2 interaction. The relaxation effect of H2S on isolated thoracic aorta was eliminated when the H2S/selenite mixture was applied. The mixture inhibited the H2S biphasic effect on rat systolic and pulse blood pressure. The results point to the antioxidant properties of products of the H2S/selenite interaction and their effect to react with DNA and influence cardiovascular homeostasis. The effects of the products may contribute to explain some of the biological effects of H2S and/or selenite, and they may imply that a suitable H2S/selenite supplement might have a beneficial effect in pathological conditions arisen, e.g., from oxidative stress.
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Pang KL, Chin KY. Emerging Anticancer Potentials of Selenium on Osteosarcoma. Int J Mol Sci 2019; 20:E5318. [PMID: 31731474 PMCID: PMC6862058 DOI: 10.3390/ijms20215318] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/05/2019] [Accepted: 10/22/2019] [Indexed: 02/07/2023] Open
Abstract
Selenium is a trace element essential to humans and forms complexes with proteins, which exert physiological functions in the body. In vitro studies suggested that selenium possesses anticancer effects and may be effective against osteosarcoma. This review aims to summarise current evidence on the anticancer activity of inorganic and organic selenium on osteosarcoma. Cellular studies revealed that inorganic and organic selenium shows cytotoxicity, anti-proliferative and pro-apoptotic effects on various osteosarcoma cell lines. These actions may be mediated by oxidative stress induced by selenium compounds, leading to the activation of p53, proapoptotic proteins and caspases. Inorganic selenium is selective towards cancer cells, but can cause non-selective cell death at a high dose. This condition challenges the controlled release of selenium from biomaterials. Selenium treatment in animals inoculated with osteosarcoma reduced the tumour size, but did not eliminate the incidence of osteosarcoma. Only one study investigated the relationship between selenium and osteosarcoma in humans, but the results were inconclusive. In summary, although selenium may exert anticancer properties on osteosarcoma in experimental model systems, its effects in humans require further investigation.
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Affiliation(s)
| | - Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur 56000, Malaysia;
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15
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Koudelkova Z, Bytesnikova Z, Xhaxhiu K, Kremplova M, Hynek D, Adam V, Richtera L. Electrochemical Evaluation of Selenium (IV) Removal from Its Aqueous Solutions by Unmodified and Modified Graphene Oxide. Molecules 2019; 24:E1063. [PMID: 30889907 PMCID: PMC6470742 DOI: 10.3390/molecules24061063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/08/2019] [Accepted: 03/13/2019] [Indexed: 01/10/2023] Open
Abstract
The removal of selenium from superficial and waste water is a worldwide problem. The maximum limit according to the World Health Organization (WHO) for the selenium in the water is set at a concentration of 10 μg/L. Carbon based adsorbents have attracted much attention and recently demonstrated promising performance in removal of selenium. In this work, several materials (iron oxide based microparticles and graphene oxides materials) and their composites were prepared to remove Se(IV) from water. The graphene oxides were prepared according to the simplified Hummer's method. In addition, the effect of pH, contact time and initial Se(IV) concentration was tested. An electrochemical method such as the differential pulse cathodic stripping voltammetry was used to determine the residual selenium concentration. From the experimental data, Langmuir adsorption model was used to calculate the maximum adsorption capacity. Graphene oxide particles modified by iron oxide based microparticles was the most promising material for the removal of Se(IV) from its aqueous solution at pH 2.0. Its adsorption efficiency reached more than 90% for a solution with given Se(IV) concentration, meanwhile its maximal recorded adsorption capacity was 18.69 mg/g.
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Affiliation(s)
- Zuzana Koudelkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
| | - Zuzana Bytesnikova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, CZ-61200 Brno, Czech Republic.
| | - Kledi Xhaxhiu
- Department of Chemistry, Faculty of Natural Sciences, University of Tirana, Blv. Zog I, No. 2/1, 1001 Tirana, Albania.
| | - Monika Kremplova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
| | - David Hynek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, CZ-61200 Brno, Czech Republic.
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, CZ-61200 Brno, Czech Republic.
| | - Lukas Richtera
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, CZ-61200 Brno, Czech Republic.
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16
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Role of Zinc and Selenium in Oxidative Stress and Immunosenescence: Implications for Healthy Aging and Longevity. HANDBOOK OF IMMUNOSENESCENCE 2019. [PMCID: PMC7121636 DOI: 10.1007/978-3-319-99375-1_66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aging is a complex process that includes gradual and spontaneous biochemical and physiological changes which contributes to a decline in performance and increased susceptibility to diseases. Zn and Se are essential trace elements that play a pivotal role in immune functions and antioxidant defense and, consequently, are claimed to play also a role in successful aging trajectories. Consistently with their nature of essential trace elements, a plethora of data obtained “in vitro” and “in vivo” (in humans and animal models) support the relevance of Zn and Se for both the innate and adoptive immune response. Moreover, Zn and Se are strictly involved in the synthesis and regulation of activity of proteins and enzymes, e.g., metallothioneins (MT) and glutathione peroxidase (GPX), that are necessary for our endogenous antioxidant response. This is clearly important to protect our cells from oxidative damage and to slow the decline of our immune system with aging. Age-related changes affecting tissue levels of Zn and Se may indicate that the risk of Zn and Se deficiency increases with aging. However, it is still unclear which of these changes can be the consequence of a “real deficiency” and which can be part of our physiological compensatory response to the accumulating damage occurring in aging. Furthermore, the upregulation of antioxidant proteins (Zn and Se dependent) may be a manifestation of self-induced oxidative stress. By the way, Zn and Se dependent proteins are modulated not only by nutritional status, but also by well-known hallmarks of aging that play antagonistic functions, such as the deregulated nutrient sensing pathways and cellular senescence. Thus, it is not an easy task to conduct Zn or Se supplementation in elderly and it is emerging consistent that these kind of supplementation requires an individualized approach. Anyway, there is consistent support that supplementation with Zn using doses around 10 mg/day is generally safe in elderly and may even improve part of immune performances in those subjects with a baseline deficiency. Regarding Se supplementation, it may induce both beneficial and detrimental effects on cellular immunity depending on the form of Se, supplemental dose, and delivery matrix. The nutritional association of supplements based on “Zn plus Se” is hypothesized to provide additional benefits, but this will likely need a more complex individualized approach. The improvement of our knowledge around screening and detection of Zn and Se deficiency in aging could lead to substantial benefits in terms of efficacy of nutritional supplements aimed at ameliorate performance and health in aging.
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17
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Van Hemelrijck M, Sollie S, Nelson WG, Yager JD, Kanarek NF, Dobs A, Platz EA, Rohrmann S. Selenium and Sex Steroid Hormones in a U.S. Nationally Representative Sample of Men: A Role for the Link between Selenium and Estradiol in Prostate Carcinogenesis? Cancer Epidemiol Biomarkers Prev 2018; 28:578-583. [PMID: 30482876 DOI: 10.1158/1055-9965.epi-18-0520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/25/2018] [Accepted: 11/14/2018] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Given the recent findings from pooled studies about a potential inverse association between selenium levels and prostate cancer risk, this cross-sectional study aimed to investigate the association between serum selenium and serum concentrations of sex steroid hormones including estradiol in a nationally representative sample of U.S. men to investigate one mechanism by which selenium may influence prostate cancer risk. METHODS The study included 1,420 men ages 20 years or older who participated in the Third National Health and Nutrition Examination Survey between 1988 and 1994. We calculated age/race-ethnicity-adjusted and multivariable-adjusted geometric mean serum concentrations of total and estimated free testosterone and estradiol, androstanediol glucuronide, and sex hormone binding globulin, and compared them across quartiles of serum selenium. RESULTS Adjusting for age, race/ethnicity, smoking status, serum cotinine, household income, physical activity, alcohol consumption, and percent body fat, mean total estradiol [e.g., Q1, 38.00 pg/mL (95% confidence interval (CI), 36.03-40.08) vs. Q4, 35.29 pg/mL (95% CI, 33.53-37.14); P trend = 0.050] and free estradiol [e.g., Q1, 0.96 pg/mL (95% CI, 0.92-1.01) vs. Q4, 0.90 (95% CI, 0.85-0.95); P trend = 0.065] concentrations decreased over quartiles of selenium. Stratification by smoking and alcohol consumption, showed that the latter observation was stronger for never smokers (P interaction = 0.073) and those with limited alcohol intake (P interaction = 0.017). No associations were observed for the other sex steroid hormones studied. CONCLUSIONS Our findings suggests that a possible mechanism by which selenium may be protective for prostate cancer is related to estrogen. IMPACT Further studies of longitudinal measurements of serum and toenail selenium in relation to serum measurements of sex steroid hormones are needed.
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Affiliation(s)
- Mieke Van Hemelrijck
- King's College London, School of Cancer and Pharmaceutical Sciences, Translational Oncology and Urology Research (TOUR), London, United Kingdom.
| | - Sam Sollie
- King's College London, School of Cancer and Pharmaceutical Sciences, Translational Oncology and Urology Research (TOUR), London, United Kingdom
| | - William G Nelson
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - James D Yager
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Norma F Kanarek
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Adrian Dobs
- Division of Endocrinology, Diabetes and Metabolism, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Elizabeth A Platz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Sabine Rohrmann
- Department of Chronic Disease Epidemiology, Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Zurich, Zurich, Switzerland.
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18
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Psaltopoulou T, Ntanasis-Stathopoulos I, Tsilimigras DI, Tzanninis IG, Gavriatopoulou M, Sergentanis TN. Micronutrient Intake and Risk of Hematological Malignancies in Adults: A Systematic Review and Meta-analysis of Cohort Studies. Nutr Cancer 2018; 70:821-839. [PMID: 30288994 DOI: 10.1080/01635581.2018.1490444] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
There has been accumulating evidence that several micronutrients may play a protective role in the risk of solid cancers. However, their role in hematological malignancies remains to be elucidated; this meta-analysis aims to evaluate the associations between micronutrient intake as well as supplementation and risk of hematological cancer in adults. Eligible cohort studies (examining intake of vitamin A, vitamin C, vitamin D, vitamin E, lycopene, folate, iron, carotenoids, beta-carotene, selenium, pyridoxine) were sought in PubMed up to July 31, 2016. Random-effects models were used for the calculation of pooled relative risks (RR) with their 95% confidence intervals (CI). Twelve cohort studies were deemed eligible. Null associations were noted regarding supplemented vitamin A (pooled relative risk [RR] = 0.92, 95% confidence interval [CI]: 0.80-1.07), supplemented vitamin C (pooled RR = 1.00, 95%CI: 0.90-1.12), total vitamin D (pooled RR = 1.05, 95%CI: 0.91-1.20), supplemented vitamin E (pooled RR = 0.98, 95%CI: 0.88-1.10), and dietary lycopene intake (pooled RR = 1.00, 95%CI: 0.86-1.16) and the risk of non-Hodgkin lymphoma. No summary estimates are provided for other hematological malignancies due to the limited number of studies. Future prospective trials should be conducted for a better understanding of this field; especially regarding Hodgkin lymphoma, leukemia and plasma cell neoplasms, on which data are scarce.
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Affiliation(s)
- Theodora Psaltopoulou
- a Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
| | - Ioannis Ntanasis-Stathopoulos
- b Department of Clinical Therapeutics , Alexandra Hospital , School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
| | - Diamantis I Tsilimigras
- a Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
| | - Ioannis-Georgios Tzanninis
- a Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
| | - Maria Gavriatopoulou
- b Department of Clinical Therapeutics , Alexandra Hospital , School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
| | - Theodoros N Sergentanis
- a Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine , National and Kapodistrian University of Athens , Athens, Greece
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19
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Li M, Cheng W, Nie T, Lai H, Hu X, Luo J, Li F, Li H. Selenoprotein K Mediates the Proliferation, Migration, and Invasion of Human Choriocarcinoma Cells by Negatively Regulating Human Chorionic Gonadotropin Expression via ERK, p38 MAPK, and Akt Signaling Pathway. Biol Trace Elem Res 2018; 184:47-59. [PMID: 28983820 DOI: 10.1007/s12011-017-1155-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/13/2017] [Indexed: 12/30/2022]
Abstract
Selenoprotein K (SelK), a member of selenoprotein family, is identified as a single endoplasmic reticulum (ER) transmembrane protein. Although over-expression of SelK inhibits adherence and migration of human gastric cancer BGC-823 cells, the effects of SelK in human choriocarcinoma (CCA) are not well understood. In this study, the expression levels of SelK in three CCA cell lines, BeWo, JEG-3, and JAR, were examined. The effects of silencing or over-expressing SelK on expression of human chorionic gonadotropin beta subunit (β-hCG) were detected by western blotting. The results show that the protein level of β-hCG was reciprocally regulated by down- or up-regulation of SelK (*P < 0.05; #P < 0.05). The proliferative, migratory, and invasive capabilities of JEG-3 cells with reduced or over-expressed SelK were then tested using the cell counting kit-8 (CCK-8), wound healing, and transwell chamber assays. We found that these cellular activities were markedly increased by the loss of SelK in JEG-3 cells. Conversely, over-expressing SelK in JEG-3 cells suppressed these phenotypes. In addition, SelK expression after down- or up-regulation of β-hCG was also measured. Surprisingly, we found that level of SelK was affected by β-hCG (*P < 0.05; #P < 0.05). The proliferation, migration, and invasion were determined in JEG-3 cells after each over-expression and reduction of β-hCG. The results confirmed that β-hCG functions as a promoter of human choriocarcinoma. Furthermore, ERK/p38 MAPK and Akt signaling pathways were found to involve in these cellular functions. This work suggests that SelK may act as a tumor suppressor in human choriocarcinoma cells by negatively regulating β-hCG expression via ERK, p38 MAPK, and Akt signaling pathways. These findings revealed that selenoprotein K may serve as a novel target for human choriocarcinoma therapy in vitro.
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Affiliation(s)
- Mengdi Li
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Wanpeng Cheng
- Department of Clinical Laboratory, Qinhuangdao First Hospital, 258 Wenhua Road, Qinhuangdao, 066000, China
| | - Tingting Nie
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Hehuan Lai
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Xiaoyan Hu
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Jincheng Luo
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Fenglan Li
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Hui Li
- Department of Biochemistry and Molecular Biology, Basic Medical Science College, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China.
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20
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The Relationship between Selenium and Lung Cancer: An Updated Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2018. [DOI: 10.5812/ijcm.8370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ekoue DN, Ansong E, Liu L, Macias V, Deaton R, Lacher C, Picklo M, Nonn L, Gann PH, Kajdacsy‐Balla A, Prins GS, Freeman VL, Diamond AM. Correlations of SELENOF and SELENOP genotypes with serum selenium levels and prostate cancer. Prostate 2018; 78:279-288. [PMID: 29314169 PMCID: PMC5817240 DOI: 10.1002/pros.23471] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 12/05/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND Selenium status is inversely associated with the incidence of prostate cancer. However, supplementation trials have not indicated a benefit of selenium supplementation in reducing cancer risk. Polymorphisms in the gene encoding selenoprotein 15 (SELENOF) are associated with cancer incidence/mortality and present disproportionately in African Americans. Relationships among the genotype of selenoproteins implicated in increased cancer risk, selenium status, and race with prostate cancer were investigated. METHODS Tissue microarrays were used to assess SELENOF levels and cellular location in prostatic tissue. Sera and DNA from participants of the Chicago-based Adiposity Study Cohort were used to quantify selenium levels and genotype frequencies of the genes for SELENOF and the selenium-carrier protein selenoprotein P (SELENOP). Logistic regression models for dichotomous patient outcomes and regression models for continuous outcome were employed to identify both clinical, genetic, and biochemical characteristics that are associated with these outcomes. RESULTS SELENOF is dramatically reduced in prostate cancer and lower in tumors derived from African American men as compared to tumors obtained from Caucasians. Differing frequency of SELENOF polymorphisms and lower selenium levels were observed in African Americans as compared to Caucasians. SELENOF genotypes were associated with higher histological tumor grade. A polymorphism in SELENOP was associated with recurrence and higher serum PSA. CONCLUSIONS These results indicate an interaction between selenium status and selenoprotein genotypes that may contribute to the disparity in prostate cancer incidence and outcome experienced by African Americans.
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Affiliation(s)
- Dede N. Ekoue
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Emmanuel Ansong
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Li Liu
- Department of Epidemiology and BiostatisticsSchool of Public HealthUniversity of Illinois at ChicagoChicagoIllinois
| | - Virgilia Macias
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Ryan Deaton
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Craig Lacher
- USDA‐ARSGrand Forks Human Nutrition Research CenterGrand ForksNorth Dakota
| | - Matthew Picklo
- USDA‐ARSGrand Forks Human Nutrition Research CenterGrand ForksNorth Dakota
| | - Larisa Nonn
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Peter H. Gann
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Andre Kajdacsy‐Balla
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Gail S. Prins
- Departments of Urology and PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
| | - Vincent L. Freeman
- Department of Epidemiology and BiostatisticsSchool of Public HealthUniversity of Illinois at ChicagoChicagoIllinois
| | - Alan M. Diamond
- Department of PathologyCollege of MedicineUniversity of Illinois at ChicagoChicagoIllinois
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Protective effects of Chinese Fenggang zinc selenium tea on metabolic syndrome in high-sucrose-high-fat diet-induced obese rats. Sci Rep 2018; 8:3528. [PMID: 29476111 PMCID: PMC5824815 DOI: 10.1038/s41598-018-21913-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 02/02/2018] [Indexed: 02/06/2023] Open
Abstract
The protective effect of zinc selenium tea against metabolic syndrome (MetS) was tested by using a high-sucrose-high-fat diet (HSHFD)-induced MetS model. Fifty Sprague–Dawley rats were randomly divided into five groups: normal diet (C-group), HSHFD (CH-group), HSHFD + green tea (0.24 g/kg/day) (TH-group), HSHFD + low-dose zinc selenium organic tea (0.24 g/kg/day) (ZTHL-group), and HSHFD + high-dose zinc selenium organic tea (1.20 g/kg/day) (ZTHH-group). After 8 weeks, compared to both the C-group and CH-group, the hepatosomatic index (HI) was significantly reduced in the ZTHL-group (p < 0.05). Fasting blood glucose (FBG) levels were highest in the TH-group, followed by the CH-group, then the ZTHL-group, then the ZTHH-group, and finally the C-group. Compared with the CH-group, the serum total cholesterol (TC) and low density lipid-cholesterol (LDL-C) concentrations were significantly lower in the ZTHH-group (p < 0.05). Significant decreases in serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bile acids (TBA), alkaline phosphatase (ALP), and direct bilirubin (DBIL) levels were observed in ZTHL-group versus the CH-group (p < 0.05). Serum alpha-L-fucosidase (AFU) levels in the ZTHH-group were lower than in the CH-group (P < 0.01). Histopathological examination of the liver and fat biopsies illustrates that the liver cells showed a decrease in the extent of necrosis and dropsy in the ZTHL-group and ZTHH-group versus the CH-group. Zinc selenium tea showed a protection effect against hepatic damage.
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Vinceti M, Filippini T, Del Giovane C, Dennert G, Zwahlen M, Brinkman M, Zeegers MPA, Horneber M, D'Amico R, Crespi CM. Selenium for preventing cancer. Cochrane Database Syst Rev 2018; 1:CD005195. [PMID: 29376219 PMCID: PMC6491296 DOI: 10.1002/14651858.cd005195.pub4] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND This review is the third update of the Cochrane review "Selenium for preventing cancer". Selenium is a naturally occurring element with both nutritional and toxicological properties. Higher selenium exposure and selenium supplements have been suggested to protect against several types of cancer. OBJECTIVES To gather and present evidence needed to address two research questions:1. What is the aetiological relationship between selenium exposure and cancer risk in humans?2. Describe the efficacy of selenium supplementation for cancer prevention in humans. SEARCH METHODS We updated electronic searches of the Cochrane Central Register of Controlled Trials (CENTRAL; 2017, Issue 2), MEDLINE (Ovid, 2013 to January 2017, week 4), and Embase (2013 to 2017, week 6), as well as searches of clinical trial registries. SELECTION CRITERIA We included randomised controlled trials (RCTs) and longitudinal observational studies that enrolled adult participants. DATA COLLECTION AND ANALYSIS We performed random-effects (RE) meta-analyses when two or more RCTs were available for a specific outcome. We conducted RE meta-analyses when five or more observational studies were available for a specific outcome. We assessed risk of bias in RCTs and in observational studies using Cochrane's risk assessment tool and the Newcastle-Ottawa Scale, respectively. We considered in the primary analysis data pooled from RCTs with low risk of bias. We assessed the certainty of evidence by using the GRADE approach. MAIN RESULTS We included 83 studies in this updated review: two additional RCTs (10 in total) and a few additional trial reports for previously included studies. RCTs involved 27,232 participants allocated to either selenium supplements or placebo. For analyses of RCTs with low risk of bias, the summary risk ratio (RR) for any cancer incidence was 1.01 (95% confidence interval (CI) 0.93 to 1.10; 3 studies, 19,475 participants; high-certainty evidence). The RR for estimated cancer mortality was 1.02 (95% CI 0.80 to 1.30; 1 study, 17,444 participants). For the most frequently investigated site-specific cancers, investigators provided little evidence of any effect of selenium supplementation. Two RCTs with 19,009 participants indicated that colorectal cancer was unaffected by selenium administration (RR 0.99, 95% CI 0.69 to 1.43), as were non-melanoma skin cancer (RR 1.16, 95% CI 0.30 to 4.42; 2 studies, 2027 participants), lung cancer (RR 1.16, 95% CI 0.89 to 1.50; 2 studies, 19,009 participants), breast cancer (RR 2.04, 95% CI 0.44 to 9.55; 1 study, 802 participants), bladder cancer (RR 1.07, 95% CI 0.76 to 1.52; 2 studies, 19,009 participants), and prostate cancer (RR 1.01, 95% CI 0.90 to 1.14; 4 studies, 18,942 participants). Certainty of the evidence was high for all of these cancer sites, except for breast cancer, which was of moderate certainty owing to imprecision, and non-melanoma skin cancer, which we judged as moderate certainty owing to high heterogeneity. RCTs with low risk of bias suggested increased melanoma risk.Results for most outcomes were similar when we included all RCTs in the meta-analysis, regardless of risk of bias. Selenium supplementation did not reduce overall cancer incidence (RR 0.99, 95% CI 0.86 to 1.14; 5 studies, 21,860 participants) nor mortality (RR 0.81, 95% CI 0.49 to 1.32; 2 studies, 18,698 participants). Summary RRs for site-specific cancers showed limited changes compared with estimates from high-quality studies alone, except for liver cancer, for which results were reversed.In the largest trial, the Selenium and Vitamin E Cancer Trial, selenium supplementation increased risks of alopecia and dermatitis, and for participants with highest background selenium status, supplementation also increased risk of high-grade prostate cancer. RCTs showed a slightly increased risk of type 2 diabetes associated with supplementation. A hypothesis generated by the Nutritional Prevention of Cancer Trial - that individuals with low blood selenium levels could reduce their risk of cancer (particularly prostate cancer) by increasing selenium intake - has not been confirmed. As RCT participants have been overwhelmingly male (88%), we could not assess the potential influence of sex or gender.We included 15 additional observational cohort studies (70 in total; over 2,360,000 participants). We found that lower cancer incidence (summary odds ratio (OR) 0.72, 95% CI 0.55 to 0.93; 7 studies, 76,239 participants) and lower cancer mortality (OR 0.76, 95% CI 0.59 to 0.97; 7 studies, 183,863 participants) were associated with the highest category of selenium exposure compared with the lowest. Cancer incidence was lower in men (OR 0.72, 95% CI 0.46 to 1.14, 4 studies, 29,365 men) than in women (OR 0.90, 95% CI 0.45 to 1.77, 2 studies, 18,244 women). Data show a decrease in risk of site-specific cancers for stomach, colorectal, lung, breast, bladder, and prostate cancers. However, these studies have major weaknesses due to study design, exposure misclassification, and potential unmeasured confounding due to lifestyle or nutritional factors covarying with selenium exposure beyond those taken into account in multi-variable analyses. In addition, no evidence of a dose-response relation between selenium status and cancer risk emerged. Certainty of evidence was very low for each outcome. Some studies suggested that genetic factors might modify the relation between selenium and cancer risk - an issue that merits further investigation. AUTHORS' CONCLUSIONS Well-designed and well-conducted RCTs have shown no beneficial effect of selenium supplements in reducing cancer risk (high certainty of evidence). Some RCTs have raised concerns by reporting a higher incidence of high-grade prostate cancer and type 2 diabetes in participants with selenium supplementation. No clear evidence of an influence of baseline participant selenium status on outcomes has emerged in these studies.Observational longitudinal studies have shown an inverse association between selenium exposure and risk of some cancer types, but null and direct relations have also been reported, and no systematic pattern suggesting dose-response relations has emerged. These studies suffer from limitations inherent to the observational design, including exposure misclassification and unmeasured confounding.Overall, there is no evidence to suggest that increasing selenium intake through diet or supplementation prevents cancer in humans. However, more research is needed to assess whether selenium may modify the risk of cancer in individuals with a specific genetic background or nutritional status, and to investigate possible differential effects of various forms of selenium.
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Affiliation(s)
- Marco Vinceti
- Boston University School of Public HealthDepartment of Epidemiology715 Albany StreetBoston, MAUSA02118
- University of Modena and Reggio EmiliaResearch Center in Environmental, Nutritional and Genetic Epidemiology (CREAGEN), Department of Biomedical, Metabolic and Neural SciencesVia Campi 287ModenaItaly41125
| | - Tommaso Filippini
- University of Modena and Reggio EmiliaResearch Center in Environmental, Nutritional and Genetic Epidemiology (CREAGEN), Department of Biomedical, Metabolic and Neural SciencesVia Campi 287ModenaItaly41125
| | - Cinzia Del Giovane
- University of BernInstitute of Primary Health Care (BIHAM)Gesellschaftsstrasse 49BernSwitzerland3012
- University of Modena and Reggio EmiliaCochrane Italy, Department of Diagnostic, Clinical and Public Health MedicineVia del Pozzo, 71ModenaItaly41100
| | - Gabriele Dennert
- University of Applied Sciences DortmundSocial Medicine and Public Health with Focus on Gender and Diversity, Department of Applied Social SciencesEmil‐Figge‐Str. 44DortmundGermanyD‐44227
| | - Marcel Zwahlen
- University of BernInstitute of Social and Preventive Medicine (ISPM)Finkelhubelweg11BernSwitzerland3012
| | - Maree Brinkman
- Nutrition Biomed Research InstituteDepartment of Nutritional Epidemiology and Clinical StudiesArgyle Place SouthMelbourneVictoriaAustralia3053
- Chairgroup of Complex Genetics and Epidemiology, School for Nutrition and Translational Research in Metabolism, Care and Public Health Research InstituteUnit of Nutritional and Cancer EpidemiologyMaastricht UniversityMaastrichtNetherlands
| | | | - Markus Horneber
- Paracelsus Medical University, Klinikum NurembergDepartment of Internal Medicine, Division of Oncology and HematologyProf.‐Ernst‐Nathan‐Str. 1NurembergGermanyD‐90419
| | - Roberto D'Amico
- University of Modena and Reggio EmiliaCochrane Italy, Department of Diagnostic, Clinical and Public Health MedicineVia del Pozzo, 71ModenaItaly41100
| | - Catherine M Crespi
- University of California Los AngelesBiostatisticsFielding School of Public Health650 Charles Young Drive South, A2‐125 CHS, Box 956900Los AngelesCaliforniaUSA90095‐6900
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Lubiński J, Marciniak W, Muszynska M, Jaworowska E, Sulikowski M, Jakubowska A, Kaczmarek K, Sukiennicki G, Falco M, Baszuk P, Mojsiewicz M, Kotsopoulos J, Sun P, Narod SA, Lubiński JA. Serum selenium levels and the risk of progression of laryngeal cancer. PLoS One 2018; 13:e0184873. [PMID: 29304040 PMCID: PMC5755727 DOI: 10.1371/journal.pone.0184873] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 09/03/2017] [Indexed: 12/31/2022] Open
Abstract
Background Observational studies have reported an inverse relationship between selenium status (blood or toenail) and the risk of laryngeal cancer; however, the impact of low serum selenium level on survival has not been evaluated. Methods We conducted a prospective study of 296 patients diagnosed with laryngeal cancer in Szczecin, Poland. Serum selenium was measured at diagnosis and prior to treatment. Patients were followed from the date of diagnosis to death at five years. Vital status was obtained by linkage to the Polish National Death Registry. Results The five-year survival after diagnosis was 82.0% (95% CI: 68% to 91%) for individuals in the highest quartile of serum selenium (> 66.8 μg/L) and was 28.6% (95% CI 19% to 42%) for individuals in the lowest quartile (<50.0 μg/L). In an age- and sex-adjusted analysis, the hazard ratio (HR) for death from all causes was 7.01 (95% CI 3.81 to 12.9) for patients in the lowest quartile of serum selenium, compared to those in the highest quartile. The corresponding multivariate HR was 3.07 (95% CI 1.59 to 5.94). Conclusions This study suggests that a selenium level in excess of 70 μg/L is associated with improved outcome among patients undergoing treatment for laryngeal cancer. Further studies are needed to evaluate if selenium supplementation to achieve this level might improve overall prognosis.
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Affiliation(s)
- Jan Lubiński
- Clinic of Otolaryngology, Pomeranian Medical University, Szczecin, Poland
- ReadGene, Grzepnica, Poland
| | - Wojciech Marciniak
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Magdalena Muszynska
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Jaworowska
- Clinic of Otolaryngology, Pomeranian Medical University, Szczecin, Poland
| | | | - Anna Jakubowska
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Katarzyna Kaczmarek
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Grzegorz Sukiennicki
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Michal Falco
- Regional Oncology Centre Szczecin, Szczecin, Poland
| | - Piotr Baszuk
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Magdalena Mojsiewicz
- Institute of Econometric and Statistics, University of Szczecin, Szczecin, Poland
| | - Joanne Kotsopoulos
- Women’s College Research Institute, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Ping Sun
- Women’s College Research Institute, Toronto, Canada
| | - Steven A. Narod
- Women’s College Research Institute, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- * E-mail: (SN); (JAL)
| | - Jan A. Lubiński
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
- * E-mail: (SN); (JAL)
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25
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Vinceti M, Chiari A, Eichmüller M, Rothman KJ, Filippini T, Malagoli C, Weuve J, Tondelli M, Zamboni G, Nichelli PF, Michalke B. A selenium species in cerebrospinal fluid predicts conversion to Alzheimer's dementia in persons with mild cognitive impairment. ALZHEIMERS RESEARCH & THERAPY 2017; 9:100. [PMID: 29258624 PMCID: PMC5735937 DOI: 10.1186/s13195-017-0323-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/20/2017] [Indexed: 12/13/2022]
Abstract
Background Little is known about factors influencing progression from mild cognitive impairment to Alzheimer’s dementia. A potential role of environmental chemicals and specifically of selenium, a trace element of nutritional and toxicological relevance, has been suggested. Epidemiologic studies of selenium are lacking, however, with the exception of a recent randomized trial based on an organic selenium form. Methods We determined concentrations of selenium species in cerebrospinal fluid sampled at diagnosis in 56 participants with mild cognitive impairment of nonvascular origin. We then investigated the relation of these concentrations to subsequent conversion from mild cognitive impairment to Alzheimer’s dementia. Results Twenty-one out of the 56 subjects developed Alzheimer’s dementia during a median follow-up of 42 months; four subjects developed frontotemporal dementia and two patients Lewy body dementia. In a Cox proportional hazards model adjusting for age, sex, duration of sample storage, and education, an inorganic selenium form, selenate, showed a strong association with Alzheimer’s dementia risk, with an adjusted hazard ratio of 3.1 (95% confidence interval 1.0–9.5) in subjects having a cerebrospinal fluid content above the median level, compared with those with lower concentration. The hazard ratio of Alzheimer’s dementia showed little departure from unity for all other inorganic and organic selenium species. These associations were similar in analyses that measured exposure on a continuous scale, and also after excluding individuals who converted to Alzheimer’s dementia at the beginning of the follow-up. Conclusions These results indicate that higher amounts of a potentially toxic inorganic selenium form in cerebrospinal fluid may predict conversion from mild cognitive impairment to Alzheimer’s dementia. Electronic supplementary material The online version of this article (doi:10.1186/s13195-017-0323-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marco Vinceti
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy. .,Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy. .,Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA.
| | - Annalisa Chiari
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Marcel Eichmüller
- Helmholtz Zentrum München GmbH-German Research Center for Environmental Health GmbH, Research Unit Analytical BioGeoChemistry, 1 Ingolstaedter Landstrasse, Neuherberg, 85764, Germany
| | - Kenneth J Rothman
- Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA.,Research Triangle Institute, Research Triangle Park, 3040 E Cornwallis Road, Durham, NC, 27709, USA
| | - Tommaso Filippini
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Carlotta Malagoli
- CREAGEN-Environmental, Genetic, and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Jennifer Weuve
- Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, Boston, MA, 02118, USA
| | - Manuela Tondelli
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Giovanna Zamboni
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy
| | - Paolo F Nichelli
- Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 287 Via Campi, Modena, 41125, Italy.,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, via del Pozzo 71, Modena, Italy
| | - Bernhard Michalke
- Helmholtz Zentrum München GmbH-German Research Center for Environmental Health GmbH, Research Unit Analytical BioGeoChemistry, 1 Ingolstaedter Landstrasse, Neuherberg, 85764, Germany
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Gong HY, He JG, Li BS. Meta-analysis of the association between selenium and gastric cancer risk. Oncotarget 2017; 7:15600-5. [PMID: 26862854 PMCID: PMC4941263 DOI: 10.18632/oncotarget.7205] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 01/09/2016] [Indexed: 11/25/2022] Open
Abstract
To clarify the effects of selenium level on the risk of gastric cancer (GC) and GC mortality, a meta-analysis was performed. Related studies were identified from PubMed, EMBASE, Springer Link, Ovid, Chinese Wanfang Data Knowledge Service Platform, Chinese National Knowledge Infrastructure (CNKI), and Chinese Biology Medicine (CBM). Pooled ORs and 95% CIs were used to assess the strengthof the associations. A total of 8 studies including 17834 subjects were involved in this meta-analysis. High selenium level was associated with GC risk in case-control study (OR = 0.62, 95% CI 0.44–0.89, P = 0.009; I2 = 52%) and cohort study (OR = 0.87, 95% CI 0.78–0.97, P = 0.01; I2 = 25%). In addition, high selenium level was associated with GC mortality risk (OR = 0.90, 95% CI 0.84–0.97, P = 0.006, I2 = 49%). In summary, this meta-analysis suggested that selenium might inversely associated with GC risk and GC mortality.
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Affiliation(s)
- He-Yi Gong
- Department of Radiation Oncology, Key Laboratory of Radiation Oncology of Shandong Province, Shandong Cancer Hospital and Institute, Jinan 250117, Shandong, P.R. China
| | - Jin-Guang He
- Department of Oncology, Heze Municiple Hospital, Heze 274031, Shandong, P.R. China
| | - Bao-Sheng Li
- Department of Radiation Oncology, Key Laboratory of Radiation Oncology of Shandong Province, Shandong Cancer Hospital and Institute, Jinan 250117, Shandong, P.R. China
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Pritchett NR, Burgert SL, Murphy GA, Brockman JD, White RE, Lando J, Chepkwony R, Topazian MD, Abnet CC, Dawsey SM, Mwachiro MM. Cross sectional study of serum selenium concentration and esophageal squamous dysplasia in western Kenya. BMC Cancer 2017; 17:835. [PMID: 29216866 PMCID: PMC5721656 DOI: 10.1186/s12885-017-3837-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 11/23/2017] [Indexed: 12/13/2022] Open
Abstract
Background Low serum selenium status has been associated with increased risk of esophageal squamous cell carcinoma (ESCC). East Africa is a region of high ESCC incidence and is known to have low soil selenium levels, but this association has not previously been evaluated. In this study we assessed the association of serum selenium concentration and the prevalence of esophageal squamous dysplasia (ESD), the precursor lesion of ESCC, in a cross-sectional study of subjects from Bomet, Kenya. Methods 294 asymptomatic adult residents of Bomet, Kenya completed questionnaires and underwent endoscopy with Lugol’s iodine staining and biopsy for detection of ESD. Serum selenium concentrations were measured by instrumental neutron activation analysis. Odds ratios (OR) and confidence intervals (95% CI) for associations between serum selenium and ESD were calculated using unconditional logistic regression. Results The mean serum selenium concentration was 85.5 (±28.3) μg/L. Forty-two ESD cases were identified (14% of those screened), including 5 (12%) in selenium quartile 1 (Q1), 5 (12%) in Q2, 15 (36%) in Q3, and 17 (40%) in Q4. Higher serum selenium was associated with prevalence of ESD (Q4 vs Q1: OR: 3.03; 95% CI: 1.05–8.74) and this association remained after adjusting for potential confounders (Q4 vs Q1: OR: 3.87; 95% CI: 1.06–14.19). Conclusion This is the first study to evaluate the association of serum selenium concentration and esophageal squamous dysplasia in an African population at high risk for ESCC. We found a positive association between higher serum selenium concentration and prevalence of ESD, an association contrary to our original hypothesis. Further work is needed to better understand the role of selenium in the etiology of ESCC in this region, and to develop effective ESCC prevention and control strategies.
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Affiliation(s)
| | | | | | - John D Brockman
- University of Missouri Research Reactor Center, Columbia, MO, USA
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Shapira S, Leshno A, Katz D, Maharshak N, Hevroni G, Jean-David M, Kraus S, Galazan L, Aroch I, Kazanov D, Hallack A, Becker S, Umanski M, Moshkowitz M, Dotan I, Arber N. Of mice and men: a novel dietary supplement for the treatment of ulcerative colitis. Therap Adv Gastroenterol 2017; 11:1756283X17741864. [PMID: 29383023 PMCID: PMC5784533 DOI: 10.1177/1756283x17741864] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/24/2017] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Curcumin, green tea polyphenols and selenium possess anti-inflammatory and anti-oxidant properties. Individually they have demonstrated some efficacy in animal models and human subjects with inflammatory bowel disease (IBD). To evaluate the efficacy and safety of Coltect [Curcumin (500 mg), green tea (250 mg) and selenium (100 µg)] in vivo and in patients with ulcerative colitis (UC). METHODS Each component was compared to placebo in a DSS mice colitis model. The efficacy was validated in a 2,4,6-trinitrobenzenesulfonic acid (TNBS) rat colitis model. Twenty patients with mild-to-moderate UC received two Coltect tablets twice daily for 8 weeks. Enrollees underwent sigmoidoscopy at study entrance and closure, and physical and laboratory evaluation at baseline, 4 and 8 weeks. RESULTS Coltect showed a synergistic therapeutic effect in the DSS and TNBS models. Disease activity was significantly higher in the placebo versus the treated group (p < 0.05). Selenium was the more active component. The contribution of green tea was minor. In the TNBS model, the Wallace scores for macroscopic lesions were 4.8 ± 1.5 (treatment) and 8.2 ± 0.5 (placebo) (p = 0.01). In humans, Coltect was well tolerated and effective. Fourteen subjects (70%) improved: nine (45%) went into complete remission, four (20%) experienced marked improvement and one (5%) experienced moderate improvement at the end of the trial. Clinical activity index decreased significantly at 4 and 8 weeks (p < 0.001). Two patients had no change in their symptoms, and one withdrew after 4 weeks. Flare-up in four subjects caused three to withdraw from the study after less than 4 weeks. Endoscopic improvement was observed in 11 (69%) patients, and four patients (25%) achieved complete remission. CONCLUSIONS Coltect may serve as a first-line or add-on therapy in patients with mild-to-moderate UC.
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Affiliation(s)
| | | | | | - Nitsan Maharshak
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Gil Hevroni
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Maayan Jean-David
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Sarah Kraus
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Lior Galazan
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Ilan Aroch
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Dina Kazanov
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Aharon Hallack
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Stewart Becker
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Mark Umanski
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Menachem Moshkowitz
- The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Iris Dotan
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv Sourasky Medical Center, affiliated to Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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Theodoratou E, Timofeeva M, Li X, Meng X, Ioannidis JPA. Nature, Nurture, and Cancer Risks: Genetic and Nutritional Contributions to Cancer. Annu Rev Nutr 2017; 37:293-320. [PMID: 28826375 DOI: 10.1146/annurev-nutr-071715-051004] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It is speculated that genetic variants are associated with differential responses to nutrients (known as gene-diet interactions) and that these variations may be linked to different cancer risks. In this review, we critically evaluate the evidence across 314 meta-analyses of observational studies and randomized controlled trials of dietary risk factors and the five most common cancers (breast, lung, prostate, colorectal, and stomach). We also critically evaluate the evidence across 13 meta-analyses of observational studies of gene-diet interactions for the same cancers. Convincing evidence for association was found only for the intake of alcohol and whole grains in relation to colorectal cancer risk. Three nutrient associations had highly suggestive evidence and another 15 associations had suggestive evidence. Among the examined gene-diet interactions, only one had moderately strong evidence.
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Affiliation(s)
- Evropi Theodoratou
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh EH8 9AG, United Kingdom.,Colon Cancer Genetics Group, Medical Research Council Human Genetics Unit, Medical Research Council Institute of Genetics & Molecular Medicine, Western General Hospital, The University of Edinburgh, Edinburgh EH4 2XU, United Kingdom
| | - Maria Timofeeva
- Colon Cancer Genetics Group, Medical Research Council Human Genetics Unit, Medical Research Council Institute of Genetics & Molecular Medicine, Western General Hospital, The University of Edinburgh, Edinburgh EH4 2XU, United Kingdom
| | - Xue Li
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh EH8 9AG, United Kingdom
| | - Xiangrui Meng
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh EH8 9AG, United Kingdom
| | - John P A Ioannidis
- Stanford Prevention Research Center, Departments of Medicine and Health Research and Policy, Stanford University School of Medicine, Stanford, California 94305-5411; .,Department of Statistics, Stanford University School of Humanities and Sciences, Stanford, California 94305-5411
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Abstract
The relation between selenium and cancer has been one of the most hotly debated topics in human health over the last decades. Early observational studies reported an inverse relation between selenium exposure and cancer risk. Subsequently, randomized controlled trials showed that selenium supplementation does not reduce the risk of cancer and may even increase it for some types, including advanced prostate cancer and skin cancer. An increased risk of diabetes has also been reported. These findings have been consistent in the most methodologically sound trials, suggesting that the early observational studies were misleading. Other studies have investigated selenium compounds as adjuvant therapy for cancer. Though there is currently insufficient evidence regarding the utility and safety of selenium compounds for such treatments, this issue is worthy of further investigation. The study of selenium and cancer is complicated by the existence of a diverse array of organic and inorganic selenium compounds, each with distinct biological properties, and this must be taken into consideration in the interpretation of both observational and experimental human studies.
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Affiliation(s)
- Marco Vinceti
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), University of Modena and Reggio Emilia, Modena, Italy; Boston University School of Public Health, Boston, MA, United States.
| | - Tommaso Filippini
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Cilloni
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), University of Modena and Reggio Emilia, Modena, Italy
| | - Catherine M Crespi
- Jonsson Comprehensive Cancer Center, UCLA Fielding School of Public Health, University of California, Los Angeles, CA, United States
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Sobiecki JG. Vegetarianism and colorectal cancer risk in a low-selenium environment: effect modification by selenium status? A possible factor contributing to the null results in British vegetarians. Eur J Nutr 2017; 56:1819-1832. [PMID: 28191611 PMCID: PMC5534195 DOI: 10.1007/s00394-016-1364-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 12/14/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Despite the consistent findings of lower total cancer incidence in vegetarians than in meat-eaters in the UK, the results of studies of colorectal cancer (CRC) risk in British vegetarians have largely been null. This was in contrast to the hypothesis of a decreased risk of CRC in this population due to null intake of red and processed meats and increased intake of fibre. Although the data are inconsistent, it has been suggested that selenium (Se) status may influence CRC risk. METHODS A literature review was performed of studies on CRC risk in vegetarians, Se intakes and status in vegetarians, and changes of Se intakes and status in the UK throughout the follow-up periods of studies on CRC risk in British vegetarians. RESULTS Vegetarians in the UK and other low-Se areas were found to have low Se intakes and status compared to non-vegetarians. There was some evidence of a reverse J-shaped curve of Se intakes and status in the UK throughout the last three decades. These presumed patterns were followed by the changes in CRC mortality or incidence in British vegetarians during this period. CONCLUSIONS Available data on Se intake and status in British vegetarians, as well as the relationship between their secular changes in the UK and changes in CRC risk in this dietary group, are compatible with the hypothesis that low Se status may contribute to the largely null results of studies of CRC risk in vegetarians in the UK.
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Affiliation(s)
- Jakub G Sobiecki
- Cancer Epidemiology Unit, Nuffield Department of Population Health, Richard Doll Building, University of Oxford, Roosevelt Drive, Oxford, OX3 7LF, UK.
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, St Mary's Campus, London, W2 1PG, UK.
- Department of Paediatrics, Nutrition and Metabolic Disorders, Children's Memorial Health Institute, Al. Dzieci Polskich 20, Warsaw, 04-730, Poland.
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Vinceti M, Filippini T, Cilloni S, Bargellini A, Vergoni AV, Tsatsakis A, Ferrante M. Health risk assessment of environmental selenium: Emerging evidence and challenges (Review). Mol Med Rep 2017; 15:3323-3335. [PMID: 28339083 PMCID: PMC5428396 DOI: 10.3892/mmr.2017.6377] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/20/2017] [Indexed: 12/22/2022] Open
Abstract
New data have been accumulated in the scientific literature in recent years which allow a more adequate risk assessment of selenium with reference to human health. This new evidence comes from environmental studies, carried out in populations characterized by abnormally high or low selenium intakes, and from high-quality and large randomized controlled trials with selenium recently carried out in the US and in other countries. These trials have consistently shown no beneficial effect on cancer and cardiovascular risk, and have yielded indications of unexpected toxic effects of selenium exposure. Overall, these studies indicate that the minimal amount of environmental selenium which is source of risk to human health is much lower than anticipated on the basis of older studies, since toxic effects were shown at levels of intake as low as around 260 µg/day for organic selenium and around 16 µg/day for inorganic selenium. Conversely, populations with average selenium intake of less than 13–19 µg/day appear to be at risk of a severe cardiomyopathy, Keshan disease. Overall, there is the need to reconsider the selenium standards for dietary intake, drinking water, outdoor and indoor air levels, taking into account the recently discovered adverse health effects of low-dose selenium overexposure, and carefully assessing the significance of selenium-induced proteomic changes.
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Affiliation(s)
- Marco Vinceti
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Tommaso Filippini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Cilloni
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Annalisa Bargellini
- CREAGEN, Research Center of Environmental, Genetic and Nutritional Epidemiology, Section of Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Anna Valeria Vergoni
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Aristides Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Heraklion, Crete, Greece
| | - Margherita Ferrante
- Department of Medical, Surgical Sciences and Advanced Technologies 'G.F. Ingrassia', University of Catania, Catania, Italy
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Kubachka KM, Hanley T, Mantha M, Wilson RA, Falconer TM, Kassa Z, Oliveira A, Landero J, Caruso J. Evaluation of selenium in dietary supplements using elemental speciation. Food Chem 2017; 218:313-320. [PMID: 27719915 PMCID: PMC5856448 DOI: 10.1016/j.foodchem.2016.08.086] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/22/2016] [Accepted: 08/24/2016] [Indexed: 11/17/2022]
Abstract
Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer confidence, these dietary supplements must be safe and have accurate label claims. Varying properties among selenium species requires information beyond total selenium concentration to fully evaluate health risk/benefits A LC-ICP-MS method was developed and multiple extraction methods were implemented for targeted analysis of common "seleno-amino acids" and related oxidation products, selenate, selenite, and other species relatable to the quality and/or accuracy of the labeled selenium ingredients. Ultimately, a heated water extraction was applied to recover selenium species from non-selenized yeast supplements in capsule, tablet, and liquid forms. For selenized yeast supplements, inorganic selenium was monitored as a means of assessing selenium yeast quality. A variety of commercially available selenium supplements were evaluated and discrepancies between labeled ingredients and detected species were noted.
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Affiliation(s)
| | - Traci Hanley
- US FDA Forensic Chemistry Center, Cincinnati, OH 45237, USA.
| | - Madhavi Mantha
- US FDA Forensic Chemistry Center, Cincinnati, OH 45237, USA.
| | - Robert A Wilson
- US FDA Forensic Chemistry Center, Cincinnati, OH 45237, USA.
| | | | - Zena Kassa
- Minnesota Department of Agriculture, Saint Paul, MN 55155, USA.
| | - Aline Oliveira
- University of Cincinnati, Department of Chemistry, Cincinnati, OH, USA.
| | - Julio Landero
- University of Cincinnati, Department of Chemistry, Cincinnati, OH, USA.
| | - Joseph Caruso
- University of Cincinnati, Department of Chemistry, Cincinnati, OH, USA
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Jablonska E, Reszka E, Gromadzinska J, Wieczorek E, Krol MB, Raimondi S, Socha K, Borawska MH, Wasowicz W. The Effect of Selenium Supplementation on Glucose Homeostasis and the Expression of Genes Related to Glucose Metabolism. Nutrients 2016; 8:nu8120772. [PMID: 27983572 PMCID: PMC5188427 DOI: 10.3390/nu8120772] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/15/2016] [Accepted: 11/24/2016] [Indexed: 12/17/2022] Open
Abstract
The aim of the study was to evaluate the effect of selenium supplementation on the expression of genes associated with glucose metabolism in humans, in order to explain the unclear relationship between selenium and the risk of diabetes. For gene expression analysis we used archival samples of cDNA from 76 non-diabetic subjects supplemented with selenium in the previous study. The supplementation period was six weeks and the daily dose of selenium was 200 µg (as selenium yeast). Blood for mRNA isolation was collected at four time points: before supplementation, after two and four weeks of supplementation, and after four weeks of washout. The analysis included 15 genes encoding selected proteins involved in insulin signaling and glucose metabolism. In addition, HbA1c and fasting plasma glucose were measured at three and four time points, respectively. Selenium supplementation was associated with a significantly decreased level of HbA1c but not fasting plasma glucose (FPG) and significant down-regulation of seven genes: INSR, ADIPOR1, LDHA, PDHA, PDHB, MYC, and HIF1AN. These results suggest that selenium may affect glycemic control at different levels of regulation, linked to insulin signaling, glycolysis, and pyruvate metabolism. Further research is needed to investigate mechanisms of such transcriptional regulation and its potential implication in direct metabolic effects.
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Affiliation(s)
- Ewa Jablonska
- Nofer Institute of Occupational Medicine, Department of Toxicology and Carcinogenesis, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Edyta Reszka
- Nofer Institute of Occupational Medicine, Department of Toxicology and Carcinogenesis, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Jolanta Gromadzinska
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Edyta Wieczorek
- Nofer Institute of Occupational Medicine, Department of Toxicology and Carcinogenesis, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Magdalena B Krol
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Sara Raimondi
- European Institute of Oncology, Division of Epidemiology and Biostatistics, via Ripamonti 435, Milan 20139, Italy.
| | - Katarzyna Socha
- The Medical University of Bialystok, Department of Bromatoloy, A. Mickiewicza 2D Street, 15-222 Bialystok, Poland.
| | - Maria H Borawska
- The Medical University of Bialystok, Department of Bromatoloy, A. Mickiewicza 2D Street, 15-222 Bialystok, Poland.
| | - Wojciech Wasowicz
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
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Hambright HG, Ghosh R. Autophagy: In the cROSshairs of cancer. Biochem Pharmacol 2016; 126:13-22. [PMID: 27789215 DOI: 10.1016/j.bcp.2016.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 10/21/2016] [Indexed: 12/18/2022]
Abstract
Two prominent features of tumors that contribute to oncogenic survival signaling are redox disruption, or oxidative stress phenotype, and high autophagy signaling, making both phenomena ideal therapeutic targets. However, the relationship between redox disruption and autophagy signaling is not well characterized and the clinical impact of reactive oxygen species (ROS)-generating chemotherapeutics on autophagy merits immediate attention as autophagy largely contributes to chemotherapeutic resistance. In this commentary we focus on melanoma, using it as an example to provide clarity to current literature regarding the roles of autophagy and redox signaling which can be applicable to initiation and maintenance of most tumor types. Further, we address the crosstalk between ROS and autophagy signaling during pharmacological intervention and cell fate decisions. We attempt to elucidate the role of autophagy in regulating cell fate following treatment with ROS-generating agents in preclinical and clinical settings and discuss the emerging role of autophagy in cell fate decisions and as a cell death mechanism. We also address technical aspects of redox and autophagy evaluation in experimental design and data interpretation. Lastly, we present a provocative view of the clinical relevance, emerging challenges in dual targeting of redox and autophagy pathways for therapy, and the future directions to be addressed in order to advance both basic and translational aspects of this field.
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Affiliation(s)
- Heather Graham Hambright
- Department of Urology, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA; Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA
| | - Rita Ghosh
- Department of Urology, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA; Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA; Department of Pharmacology, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA; Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, South Texas Research Facility Campus, 8403 Floyd Curl Drive, San Antonio, TX 78229, USA.
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Lance P, Alberts DS, Thompson PA, Fales L, Wang F, San Jose J, Jacobs ET, Goodman PJ, Darke AK, Yee M, Minasian L, Thompson IM, Roe DJ. Colorectal Adenomas in Participants of the SELECT Randomized Trial of Selenium and Vitamin E for Prostate Cancer Prevention. Cancer Prev Res (Phila) 2016; 10:45-54. [PMID: 27777235 DOI: 10.1158/1940-6207.capr-16-0104] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/13/2016] [Accepted: 10/07/2016] [Indexed: 12/31/2022]
Abstract
Selenium and vitamin E micronutrients have been advocated for the prevention of colorectal cancer. Colorectal adenoma occurrence was used as a surrogate for colorectal cancer in an ancillary study to the Selenium and Vitamin E Cancer Prevention Trial (SELECT) for prostate cancer prevention. The primary objective was to measure the effect of selenium (as selenomethionine) on colorectal adenomas occurrence, with the effect of vitamin E (as α-tocopherol) supplementation on colorectal adenoma occurrence considered as a secondary objective. Participants who underwent lower endoscopy while in SELECT were identified from a subgroup of the 35,533 men randomized in the trial. Adenoma occurrence was ascertained from the endoscopy and pathology reports for these procedures. Relative Risk (RR) estimates and 95% confidence intervals (CI) of adenoma occurrence were generated comparing those randomized to selenium versus placebo and to vitamin E versus placebo based on the full factorial design. Evaluable endoscopy information was obtained for 6,546 participants, of whom 2,286 had 1+ adenomas. Apart from 21 flexible sigmoidoscopies, all the procedures yielding adenomas were colonoscopies. Adenomas occurred in 34.2% and 35.7%, respectively, of participants whose intervention included or did not include selenium. Compared with placebo, the RR for adenoma occurrence in participants randomized to selenium was 0.96 (95% CI, 0.90-1.02; P = 0.194). Vitamin E did not affect adenoma occurrence compared with placebo (RR = 1.03; 95% CI, 0.96-1.10; P = 0.38). Neither selenium nor vitamin E supplementation can be recommended for colorectal adenoma prevention. Cancer Prev Res; 10(1); 45-54. ©2016 AACR.
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Affiliation(s)
- Peter Lance
- University of Arizona Cancer Center, Tucson, Arizona.
| | | | | | - Liane Fales
- University of Arizona Cancer Center, Tucson, Arizona
| | - Fang Wang
- University of Arizona Cancer Center, Tucson, Arizona
| | | | | | - Phyllis J Goodman
- SWOG Statistical Center, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Amy K Darke
- SWOG Statistical Center, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Monica Yee
- SWOG Statistical Center, Cancer Research and Biostatistics, Seattle, Washington
| | - Lori Minasian
- Division of Cancer Prevention, NCI, Bethesda, Maryland
| | - Ian M Thompson
- University of Texas Health Sciences Center, San Antonio, Texas
| | - Denise J Roe
- University of Arizona Cancer Center, Tucson, Arizona
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Selenoprotein H is an essential regulator of redox homeostasis that cooperates with p53 in development and tumorigenesis. Proc Natl Acad Sci U S A 2016; 113:E5562-71. [PMID: 27588899 DOI: 10.1073/pnas.1600204113] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Selenium, an essential micronutrient known for its cancer prevention properties, is incorporated into a class of selenocysteine-containing proteins (selenoproteins). Selenoprotein H (SepH) is a recently identified nucleolar oxidoreductase whose function is not well understood. Here we report that seph is an essential gene regulating organ development in zebrafish. Metabolite profiling by targeted LC-MS/MS demonstrated that SepH deficiency impairs redox balance by reducing the levels of ascorbate and methionine, while increasing methionine sulfoxide. Transcriptome analysis revealed that SepH deficiency induces an inflammatory response and activates the p53 pathway. Consequently, loss of seph renders larvae susceptible to oxidative stress and DNA damage. Finally, we demonstrate that seph interacts with p53 deficiency in adulthood to accelerate gastrointestinal tumor development. Overall, our findings establish that seph regulates redox homeostasis and suppresses DNA damage. We hypothesize that SepH deficiency may contribute to the increased cancer risk observed in cohorts with low selenium levels.
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Al-Zalabani AH, Stewart KFJ, Wesselius A, Schols AMWJ, Zeegers MP. Modifiable risk factors for the prevention of bladder cancer: a systematic review of meta-analyses. Eur J Epidemiol 2016; 31:811-51. [PMID: 27000312 PMCID: PMC5010611 DOI: 10.1007/s10654-016-0138-6] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/08/2016] [Indexed: 02/07/2023]
Abstract
Each year, 430,000 people are diagnosed with bladder cancer. Due to the high recurrence rate of the disease, primary prevention is paramount. Therefore, we reviewed all meta-analyses on modifiable risk factors of primary bladder cancer. PubMed, Embase and Cochrane database were systematically searched for meta-analyses on modifiable risk factors published between 1995 and 2015. When appropriate, meta-analyses (MA) were combined in meta-meta-analysis (MMA). If not, the most comprehensive MA was selected based on the number of primary studies included. Probability of causation was calculated for individual factors and a subset of lifestyle factors combined. Of 1496 articles identified, 5 were combined in MMA and 21 were most comprehensive on a single risk factor. Statistically significant associations were found for current (RR 3.14) or former (RR 1.83) cigarette smoking, pipe (RR 1.9) or cigar (RR 2.3) smoking, antioxidant supplementation (RR 1.52), obesity (RR 1.10), higher physical activity levels (RR 0.86), higher body levels of selenium (RR 0.61) and vitamin D (RR 0.75), and higher intakes of: processed meat (RR 1.22), vitamin A (RR 0.82), vitamin E (RR 0.82), folate (RR 0.84), fruit (RR 0.77), vegetables (RR 0.83), citrus fruit (RR 0.85), and cruciferous vegetables (RR 0.84). Finally, three occupations with the highest risk were tobacco workers (RR 1.72), dye workers (RR 1.58), and chimney sweeps (RR 1.53). The probability of causation for individual factors ranged from 4 to 68 %. The combined probability of causation was 81.8 %. Modification of lifestyle and occupational exposures can considerably reduce the bladder cancer burden. While smoking remains one of the key risk factors, also several diet-related and occupational factors are very relevant.
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Affiliation(s)
- Abdulmohsen H Al-Zalabani
- Department of Family and Community Medicine, College of Medicine, Taibah University, P.O. Box 42317, Madinah, 41541, Saudi Arabia
| | - Kelly F J Stewart
- Department of Complex Genetics, School of Nutrition, and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Centre, P. O. Box 616, 6200 MS, Maastricht, The Netherlands.
| | - Anke Wesselius
- Department of Complex Genetics, School of Nutrition, and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Centre, P. O. Box 616, 6200 MS, Maastricht, The Netherlands
| | - Annemie M W J Schols
- Department of Respiratory Medicine, School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Centre, P. O. Box 616, 6200 MS, Maastricht, The Netherlands
| | - Maurice P Zeegers
- Department of Complex Genetics, School of Nutrition, and Translational Research in Metabolism (NUTRIM), Maastricht University Medical Centre, P. O. Box 616, 6200 MS, Maastricht, The Netherlands
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Thompson PA, Ashbeck EL, Roe DJ, Fales L, Buckmeier J, Wang F, Bhattacharyya A, Hsu CH, Chow HHS, Ahnen DJ, Boland CR, Heigh RI, Fay DE, Hamilton SR, Jacobs ET, Martinez ME, Alberts DS, Lance P. Selenium Supplementation for Prevention of Colorectal Adenomas and Risk of Associated Type 2 Diabetes. J Natl Cancer Inst 2016; 108:djw152. [PMID: 27530657 DOI: 10.1093/jnci/djw152] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 05/17/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Selenium supplementation may help to prevent colorectal cancer; as precursors of colorectal cancer, colorectal adenomas are a surrogate for colorectal cancer. Selenium supplementation may increase risk of type 2 diabetes (T2D). METHODS The Selenium and Celecoxib (Sel/Cel) Trial was a randomized, placebo controlled trial of selenium 200 µg daily as selenized yeast and celecoxib 400 mg once daily, alone or together, for colorectal adenoma prevention. Men and women between age 40 and 80 years were eligible following colonoscopic removal of colorectal adenomas. The primary outcome was adenoma development. Celecoxib was suspended because of cardiovascular toxicity in other trials, but accrual continued to selenium and placebo. A total of 1621 participants were randomly assigned to selenium or placebo, of whom 1374 (84.8%) were available for analysis. All statistical tests were two-sided. RESULTS In the respective placebo and selenium arms of 689 and 685 participants, adenoma detection after medians of 33.6 (range = 0.0-85.1 months) and 33.0 months (range = 0.0-82.6 months) were 42.8% and 44.1% (relative risk [RR] = 1.03, 95% confidence interval [CI] = 0.91 to 1.16, P = .68). In participants with baseline advanced adenomas, adenoma recurrence was reduced by 18% with selenium (RR = 0.82, 95% CI = 0.71 to 0.96, P = .01). In participants receiving selenium, the hazard ratio for new-onset T2D was 1.25 (95% CI = 0.74 to 2.11, P = .41), with a statistically significantly increased risk of selenium-associated T2D among older participants (RR = 2.21; 95% CI = 1.04 to 4.67, P = .03). CONCLUSIONS Overall, selenium did not prevent colorectal adenomas and showed only modest benefit in patients with baseline advanced adenomas. With limited benefit and similar increases in T2D to other trials, selenium is not recommended for preventing colorectal adenomas in selenium-replete individuals.
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Affiliation(s)
- Patricia A Thompson
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Erin L Ashbeck
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Denise J Roe
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Liane Fales
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Julie Buckmeier
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Fang Wang
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Achyut Bhattacharyya
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Chiu-Hsieh Hsu
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - H H Sherry Chow
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Dennis J Ahnen
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - C Richard Boland
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Russell I Heigh
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - David E Fay
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Stanley R Hamilton
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Elizabeth T Jacobs
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Maria Elena Martinez
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - David S Alberts
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
| | - Peter Lance
- University of Arizona Cancer Center, Tucson, AZ (PAT, ELA, DJR, LF, JB, FW, CHH, HHSC, ETJ, DSA, PL); Department of Pathology, University of Arizona, Tucson, AZ (AB); Denver Department of Veterans Affairs Medical Center and University of Colorado, Denver, CO (DJA); GI Cancer Research Laboratory, Baylor University Medical Center, Dallas, TX (CRB); Division of Gastroenterology & Hepatology, Mayo Clinic, Scottsdale, AZ (RIH); Endoscopy Center of Western New York, Buffalo, NY (DEF); Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX (SRH); University of California, San Diego, Moores Cancer Center, La Jolla, CA (MEM). Current affiliation: Stony Brook University, Stony Brook, New York, NY (PAT)
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Morales-Sánchez MA, Peralta-Pedrero ML, Jurado-Santa Cruz F, Pomerantz H, Barajas-Nava LA. Interventions for preventing keratinocyte cancer in high-risk groups not receiving immunosuppressive therapy. Hippokratia 2016. [DOI: 10.1002/14651858.cd012266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Martha Alejandra Morales-Sánchez
- Dermatological Center, "Dr. Ladislao de la Pascua"; Education and Research Unit; Dr. José María Vértiz No. 464 Col. Buenos Aires México City Mexico 06780
| | - María Luisa Peralta-Pedrero
- Dermatological Center, "Dr. Ladislao de la Pascua"; Education and Research Unit; Dr. José María Vértiz No. 464 Col. Buenos Aires México City Mexico 06780
| | - Fermín Jurado-Santa Cruz
- Dermatological Center, "Dr. Ladislao de la Pascua"; Education and Research Unit; Dr. José María Vértiz No. 464 Col. Buenos Aires México City Mexico 06780
| | - Hyemin Pomerantz
- Hofstra Northwell School of Medicine; Department of Dermatology; Hempstead New York USA
| | - Leticia A Barajas-Nava
- Hospital Infantil de México Federico Gómez (HIMFG), Health National Institute; Evidence-Based Medicine Research Unit; Dr. Márquez #162 Col. Doctores, Del. Cuauhtémoc México City Mexico 06720
- Iberoamerican Cochrane Network; Institute of Biomedical Research (IIB Sant Pau), C/ Sant Antoni Ma Claret 171 Casa de Convalescència Barcelona Barcelona Spain 08041
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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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Zegelbone PM, Reljic T, Wilson D, Mhaskar R, Miladinovic B, Kumar A, Djulbegovic B. Chemoprevention agents for prostate cancer. Hippokratia 2016. [DOI: 10.1002/14651858.cd012228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Phillip M Zegelbone
- University of South Florida Morsani College of Medicine - Lehigh Valley Health Network SELECT Program; Evidence Based Medicine; 12901 Bruce B. Downs Blvd, MDC54 Tampa Florida USA 33647
| | - Tea Reljic
- University of South Florida; Center for Evidence Based Medicine and Health Outcomes Research; 12901 Bruce B. Downs Blvd., MDC27 Tampa Florida USA 33612
| | - Danyell Wilson
- Bowie State University; Natural Science; Baltimore Maryland USA 220715
| | - Rahul Mhaskar
- University of South Florida; Center for Evidence Based Medicine and Health Outcomes Research; 12901 Bruce B. Downs Blvd., MDC27 Tampa Florida USA 33612
| | - Branko Miladinovic
- University of South Florida; Center for Evidence Based Medicine and Health Outcomes Research; 12901 Bruce B. Downs Blvd., MDC27 Tampa Florida USA 33612
| | - Ambuj Kumar
- University of South Florida; Center for Evidence Based Medicine and Health Outcomes Research; 12901 Bruce B. Downs Blvd., MDC27 Tampa Florida USA 33612
| | - Benjamin Djulbegovic
- Moffitt Cancer Center, Division of Oncologic Sciences, University of South Florida; Department of Blood and Marrow Transplantation; Tampa Florida USA
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Hinrichsen S, Planer-Friedrich B. Cytotoxic activity of selenosulfate versus selenite in tumor cells depends on cell line and presence of amino acids. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:8349-8357. [PMID: 26780055 DOI: 10.1007/s11356-015-5960-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
Based on acute cytotoxicity studies, selenosulfate (SeSO3 (-)) has been suggested to possess a generally higher toxic activity in tumor cells than selenite. The reason for this difference in cytotoxic activity remained unclear. In the present study, cytotoxicity tests with human hepatoma (HepG2), malignant melanoma (A375), and urinary bladder carcinoma cells (T24) showed that the selenosulfate toxicity was very similar between all three tested cell lines (IC50 6.6-7.1 μM after 24 h). It was largely independent of exposure time and presence or absence of amino acids. What changed, however, was the toxicity of selenite, which was lower than that of selenosulfate only for HepG2 cells (IC50 > 15 μM), but similar to and higher than that of selenosulfate for A375 (IC50 4.7 μM) and T24 cells (IC50 3.5 μM), respectively. Addition of amino acids to T24 cell growth medium downregulated short-term selenite uptake (1.5 versus 12.9 ng Se/10(6) cells) and decreased its cytotoxicity (IC50 8.4 μM), rendering it less toxic than selenosulfate. The suggested mechanism is a stronger expression of the xc (-) transport system in the more sensitive T24 compared to HepG2 cells which creates a reductive extracellular microenvironment and facilitates selenite uptake by reduction. Selenosulfate is already reduced and so less affected. The cytotoxic activity of selenosulfate and selenite to tumor cells therefore depends on the sensitivity of each cell line, supplements like amino acids as well as the reductive state of the extracellular environment.
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Affiliation(s)
- Sinikka Hinrichsen
- Environmental Geochemistry, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440, Bayreuth, Germany
| | - Britta Planer-Friedrich
- Environmental Geochemistry, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440, Bayreuth, Germany.
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Chung HK, Nam JS, Ahn CW, Lee YS, Kim KR. Some Elements in Thyroid Tissue are Associated with More Advanced Stage of Thyroid Cancer in Korean Women. Biol Trace Elem Res 2016; 171:54-62. [PMID: 26419761 DOI: 10.1007/s12011-015-0502-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 08/31/2015] [Indexed: 01/20/2023]
Abstract
Excessive exposure to heavy metals including cadmium and lead is known to have adverse effects on various types of cancer. The aim of the present study was to evaluate the associations between blood and tissue levels of heavy metals and trace elements and different stages of thyroid cancer in Korean women. Ninety-two Korean women undergoing thyroidectomy were included in this study. Blood and thyroid tissue levels of cadmium, lead, mercury, selenium, and zinc were measured, and histopathological results, cancer tumor node metastasis (TNM) stage, and cancer multifocality were assessed. The tissue levels of cadmium, selenium, and zinc were significantly higher in patients with TNM stages 3 and 4 compared to those in stage 1. The tissue level of cadmium was greater in patients with higher tumor stage (≥T2) than those with lower stage (T1). Also, the tissue levels of cadmium and zinc were higher in multifocal group than in unifocal group. A logistic multiple regression analysis showed that the odds ratio (OR) for advanced tumor stage group (≥T2) increased in those with higher tissue cadmium level after adjustment (OR = 1.397, 95 % CI = 1.078-1.811). The accumulation of cadmium in thyroid tissue may be one of important etiologic factors for the thyroid cancer progression and aggravation in Korean women.
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Affiliation(s)
- Hye-Kyung Chung
- Severance Institute for Vascular and Metabolic Research, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea
| | - Ji Sun Nam
- Severance Institute for Vascular and Metabolic Research, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea
- Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea
| | - Chul Woo Ahn
- Severance Institute for Vascular and Metabolic Research, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea
- Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea
| | - Yong Sang Lee
- Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea.
| | - Kyung Rae Kim
- Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 135-720, Republic of Korea.
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Karunasinghe N, Zhu S, Ferguson LR. Benefits of Selenium Supplementation on Leukocyte DNA Integrity Interact with Dietary Micronutrients: A Short Communication. Nutrients 2016; 8:E249. [PMID: 27128937 PMCID: PMC4882662 DOI: 10.3390/nu8050249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 01/05/2023] Open
Abstract
A male cohort from New Zealand has previously shown variability in Selenium (Se) supplementation effects on measured biomarkers. The current analysis is to understand the reasons for variability of the H₂O₂-induced DNA damage recorded after Se supplementation. We have looked at the variation of demographic, lifestyle, medication, genetic and dietary factors and biomarkers measured at baseline and post-supplementation in these two extreme subgroups A and B. Group A showed increased H₂O₂-induced DNA damage and group B showed decreased damage after Se supplementation. We have also considered correlations of biomarkers and dietary factors in the complete dataset. The glutathione peroxidase (GPx) activity and DNA damage were significantly lower at post-supplementation in Group B compared to Group A. Post-supplementation, Group B showed a significant reduction in the GPx activity, while Group A showed a significant increase in DNA damage compared to baseline levels. Dietary methionine intake was significantly higher and folate intake was significantly lower in Group B compared to Group A. Se supplementation significantly increased the caspase-cleaved keratin 18 levels in both groups, indicating increased apoptotic potential of this supplement. Parameter correlation with the complete dataset showed dietary methionine to have a significant negative correlation with H₂O₂-induced DNA damage post-supplementation. The data suggest that Se supplementation is beneficial for the leukocyte DNA integrity only in interaction with the dietary methionine and folate intake.
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Affiliation(s)
- Nishi Karunasinghe
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Shuotun Zhu
- Discipline of Nutrition, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Lynnette R Ferguson
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
- Discipline of Nutrition, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Gröber U, Holzhauer P, Kisters K, Holick MF, Adamietz IA. Micronutrients in Oncological Intervention. Nutrients 2016; 8:163. [PMID: 26985904 PMCID: PMC4808891 DOI: 10.3390/nu8030163] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/16/2016] [Accepted: 02/24/2016] [Indexed: 12/14/2022] Open
Abstract
Nutritional supplements are widely used among patients with cancer who perceive them to be anticancer and antitoxicity agents. Depending on the type of malignancy and the gender 30%-90% of the cancer patients supplement their diets with antioxidant and immuno-stabilizing micronutrients, such as selenium, vitamin C, and vitamin D, often without the knowledge of the treating physician. From the oncological viewpoint, there are justifiable concerns that dietary supplements decrease the effectiveness of chemotherapy and radiotherapy. Recent studies, however, have provided increasing evidence that treatment is tolerated better-with an increase in patient compliance and a lower rate of treatment discontinuations-when micronutrients, such as selenium, are added as appropriate to the patient's medication. Nutritional supplementation tailored to an individual's background diet, genetics, tumor histology, and treatments may yield benefits in subsets of patients. Clinicians should have an open dialogue with patients about nutritional supplements. Supplement advice needs to be individualized and come from a credible source, and it is best communicated by the physician.
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Affiliation(s)
- Uwe Gröber
- Akademie für Mikronährstoffmedizin, Essen, Zweigertstrasse 55, 45130 Essen, Germany.
| | - Peter Holzhauer
- Akademie für Mikronährstoffmedizin, Essen, Zweigertstrasse 55, 45130 Essen, Germany.
- Interdisziplinäres onkologisches Zentrum (IOZ), München, Nußbaumstrasse 12, München 80336, Germany.
- Klinik Bad Trissl, Innere Medizin II-Onkologie und Komplementärmedizin, Oberaudorf 83080, Germany.
| | - Klaus Kisters
- Akademie für Mikronährstoffmedizin, Essen, Zweigertstrasse 55, 45130 Essen, Germany.
- St. Anna Hospital, Medizinische Klinik I, Herne, Hospitalstrasse 19, Herne 44649, Germany.
| | - Michael F Holick
- Boston University Medical Center, 85 East Newton Street M-1033, Boston, MA 02118, USA.
| | - Irenäus A Adamietz
- Klinik für Strahlentherapie und Radio-Onkologie, Ruhr Universität Bochum (RUB), Hölkeskampring 40, Herne 44625, Germany.
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47
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Affiliation(s)
- K Sandeep Prabhu
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA
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48
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Differential effect of Se on insulin resistance: regulation of adipogenesis and lipolysis. Mol Cell Biochem 2016; 415:89-102. [PMID: 26961368 DOI: 10.1007/s11010-016-2679-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/04/2016] [Indexed: 12/31/2022]
Abstract
Insulin resistance is the characteristic of type 2 diabetes mellitus and metabolic disorder. The biological effect of selenium (Se) on insulin sensitivity and metabolic function was contradictory. In this study, we designed two animal protocols to investigate the effect of physiological Se on high-fat (HF) diet-induced insulin resistance in mice and examined the influence of Se on adipocyte differentiation and lipolysis in isolated bone marrow stromal stem cells. The results showed that pre-treatment with Se, mimicking thiazolidinediones, increased adipocyte differentiation and fat deposit in adipose tissue and reduced ectopic lipid content and consequent ROS generation and mitochondrial dysfunction in livers, protecting against HF diet-induced insulin resistance. Post-treatment with Se promoted lipolysis in adipose tissue and ectopic lipid accumulation in livers and aggravated subsequent ROS generation and mitochondrial dysfunction, exacerbating insulin resistance induced by HF diet. Activation of GPx1 and Sepp1 was responsible for Se-exhibited bi-directional significance, which was at the crossroad of the biological effect of Se, leading to differential directions: one way is to accelerate mitotic clonal expansion and increase key regulators of adipocyte differentiation, such as PPARγ and C/EBPα/β, leading to enhancement of adipogenic differentiation; the other way is to activate PKA/HSL pathway, reinforcing lipolysis. Further studies are needed to elucidate the mechanism underlying GPx1 and Sepp1-exerted differential effects under different conditions. Anyhow, these findings may partly explain the contradiction of the biological significance of Se and demonstrate a novel understanding of the mechanism of Se-exerted benefit or harmful effects in the context of high consumption of fat.
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49
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Gribble MO, Karimi R, Feingold BJ, Nyland JF, O'Hara TM, Gladyshev MI, Chen CY. Mercury, selenium and fish oils in marine food webs and implications for human health. JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM. MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM 2016; 96:43-59. [PMID: 26834292 PMCID: PMC4720108 DOI: 10.1017/s0025315415001356] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 07/23/2015] [Indexed: 05/04/2023]
Abstract
Humans who eat fish are exposed to mixtures of healthful nutrients and harmful contaminants that are influenced by environmental and ecological factors. Marine fisheries are composed of a multitude of species with varying life histories, and harvested in oceans, coastal waters and estuaries where environmental and ecological conditions determine fish exposure to both nutrients and contaminants. Many of these nutrients and contaminants are thought to influence similar health outcomes (i.e., neurological, cardiovascular, immunological systems). Therefore, our understanding of the risks and benefits of consuming seafood require balanced assessments of contaminants and nutrients found in fish and shellfish. In this paper, we review some of the reported benefits of fish consumption with a focus on the potential hazards of mercury exposure, and compare the environmental variability of fish oils, selenium and mercury in fish. A major scientific gap identified is that fish tissue concentrations are rarely measured for both contaminants and nutrients across a range of species and geographic regions. Interpreting the implications of seafood for human health will require a better understanding of these multiple exposures, particularly as environmental conditions in the oceans change.
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Affiliation(s)
- Matthew O. Gribble
- Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, USA
| | - Roxanne Karimi
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, USA
| | - Beth J. Feingold
- Department of Environmental Health Sciences, University at Albany School of Public Health, State University of New York, Rensselaer, NY, USA
| | - Jennifer F. Nyland
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Todd M. O'Hara
- Department of Veterinary Medicine, College of Natural Science and Mathematics, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Michail I. Gladyshev
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russia
- Siberian Federal University, Krasnoyarsk, Russia
| | - Celia Y. Chen
- Department of Biological Sciences – Dartmouth College, Hanover, NH, USA
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50
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Selenium Exposure and Cancer Risk: an Updated Meta-analysis and Meta-regression. Sci Rep 2016; 6:19213. [PMID: 26786590 PMCID: PMC4726178 DOI: 10.1038/srep19213] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 12/08/2015] [Indexed: 02/07/2023] Open
Abstract
The objective of this study was to investigate the associations between selenium exposure and cancer risk. We identified 69 studies and applied meta-analysis, meta-regression and dose-response analysis to obtain available evidence. The results indicated that high selenium exposure had a protective effect on cancer risk (pooled OR = 0.78; 95%CI: 0.73-0.83). The results of linear and nonlinear dose-response analysis indicated that high serum/plasma selenium and toenail selenium had the efficacy on cancer prevention. However, we did not find a protective efficacy of selenium supplement. High selenium exposure may have different effects on specific types of cancer. It decreased the risk of breast cancer, lung cancer, esophageal cancer, gastric cancer, and prostate cancer, but it was not associated with colorectal cancer, bladder cancer, and skin cancer.
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