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Zytner P, Kutschbach A, Gong W, Ohse VA, Taudte L, Kipp AP, Klotz LO, Priebs J, Steinbrenner H. Selenium-Enriched E. coli Bacteria Mitigate the Age-Associated Degeneration of Cholinergic Neurons in C. elegans. Antioxidants (Basel) 2024; 13:492. [PMID: 38671939 PMCID: PMC11047679 DOI: 10.3390/antiox13040492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
Selenium (Se) is an essential trace element for humans and animals, but high-dose supplementation with Se compounds, most notably selenite, may exert cytotoxic and other adverse effects. On the other hand, bacteria, including Escherichia coli (E. coli), are capable of reducing selenite to red elemental Se that may serve as a safer Se source. Here, we examined how a diet of Se-enriched E. coli bacteria affected vital parameters and age-associated neurodegeneration in the model organism Caenorhabditis elegans (C. elegans). The growth of E. coli OP50 for 48 h in medium supplemented with 1 mM sodium selenite resulted in reddening of the bacterial culture, accompanied by Se accumulation in the bacteria. Compared to nematodes supplied with the standard E. coli OP50 diet, the worms fed on Se-enriched bacteria were smaller and slimmer, even though their food intake was not diminished. Nevertheless, given the choice, the nematodes preferred the standard diet. The fecundity of the worms was not affected by the Se-enriched bacteria, even though the production of progeny was somewhat delayed. The levels of the Se-binding protein SEMO-1, which serves as a Se buffer in C. elegans, were elevated in the group fed on Se-enriched bacteria. The occurrence of knots and ruptures within the axons of cholinergic neurons was lowered in aged nematodes provided with Se-enriched bacteria. In conclusion, C. elegans fed on Se-enriched E. coli showed less age-associated neurodegeneration, as compared to nematodes supplied with the standard diet.
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Affiliation(s)
- Palina Zytner
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Anne Kutschbach
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Weiye Gong
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Verena Alexia Ohse
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Laura Taudte
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, D-07743 Jena, Germany; (L.T.); (A.P.K.)
| | - Anna Patricia Kipp
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, D-07743 Jena, Germany; (L.T.); (A.P.K.)
| | - Lars-Oliver Klotz
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Josephine Priebs
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Holger Steinbrenner
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
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Jujić A, Molvin J, Nilsson ED, Holm Isholth H, Dieden A, Korduner J, Zaghi A, Nezami Z, Bergmann A, Schomburg L, Magnusson M. Low Levels of Selenoprotein P Are Associated With Cognitive Impairment in Patients Hospitalized for Heart Failure. J Card Fail 2024:S1071-9164(24)00039-3. [PMID: 38364966 DOI: 10.1016/j.cardfail.2024.01.010] [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: 11/08/2023] [Revised: 01/25/2024] [Accepted: 01/25/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND Selenoprotein P (SELENOP) is a transporter for selenium and has been shown to protect selenium-status maintenance in the brain against deficiency and to support neuronal development, neurogenesis and neurocognitive function. Selenium deficiency has previously been associated with cognitive impairment in various populations, but no studies have been carried out in subjects with heart failure (HF). PURPOSE To explore whether SELENOP deficiency in subjects with acute HF is associated with cognitive impairment. METHODS Plasma SELENOP, as measured by an immunoassay analysis, is a well-validated marker of plasma selenium status and has the benefit of providing information on the bioavailable fraction of selenium to preferentially supplied cells equipped with receptors for SELENOP uptake. SELENOP was measured in 320 subjects hospitalized for HF. Of the subjects, 187 also underwent 4 cognitive tests assessing global cognitive function: Montreal Cognitive Assessment (MoCA); information processing (Symbol Digit Modalities Test [SDMT]); visual attention and task switching (Trailmaking Test A [TMT-A]); and executive speed (A Quick Test of Cognitive Speed [AQT] form and color). Appropriate cutoffs were used for each cognitive test to define cognitive impairment. Cross-sectional associations between SELENOP concentrations and cognitive impairment, as defined by each cognitive test, were explored using multivariable logistic models. Further, multivariable logistic models exploring associations between selenium deficiency, defined as the lowest quartile of SELENOP levels, and cognitive impairment, defined by each cognitive test, were carried out. RESULTS The 187 participants had a mean age of 73 (± 11.9) years; 31% were female and had a mean body mass index of 28.1 (± 5.6) kg/m2. Each 1 standard deviation increment in SELENOP concentrations was associated with lower odds of cognitive impairment, defined as a MoCA cut-off score < 23 (odds ratio [OR] 0.60; 95% CI 0.40-0.91; P = 0.017). Further, SELENOP concentrations in the lowest quartile (≤ 2.3 mg/L) were associated with cognitive impairment as measured by MoCA (OR 3.10; 95% CI 1.38-6.97; P = 0.006), SDMT (OR 2.26; 95% CI 1.10-4.67; P = 0.027) and TMT-A (OR 3.40; 95% CI 1.47-7.88; P = 0.004) but not by AQT form and color. CONCLUSIONS In subjects admitted for HF, higher SELENOP concentrations were associated with better performance on the MoCA test, reflecting global cognition, and SELENOP deficiency was associated with cognitive impairment as defined by 3 cognitive tests.
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Affiliation(s)
- Amra Jujić
- Department of Clinical Sciences, Lund University, Malmö, Sweden; Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | - John Molvin
- Department of Clinical Sciences, Lund University, Malmö, Sweden; Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | | | - Hannes Holm Isholth
- Department of Clinical Sciences, Lund University, Malmö, Sweden; Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | - Anna Dieden
- Department of Clinical Sciences, Lund University, Malmö, Sweden; Department of Biomedical Science, Malmö University, Malmö, Sweden; Biofilms Research Centre for Biointerfaces, Malmö University, Malmö, Sweden
| | - Johan Korduner
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Amir Zaghi
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Zainu Nezami
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | | | - Lutz Schomburg
- The Institute for Experimental Endocrinology, Charité-Universitätsmedizin, Berlin, Germany
| | - Martin Magnusson
- Department of Clinical Sciences, Lund University, Malmö, Sweden; Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden; Wallenberg Center for Molecular Medicine, Lund University, Lund, Sweden; Hypertension in Africa Research Team (HART), North West University Potchefstroom, Potchefstroom, South Africa.
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Sasaki N, Jones LE, Carpenter DO. Fish consumption and omega-3 polyunsaturated fatty acids from diet are positively associated with cognitive function in older adults even in the presence of exposure to lead, cadmium, selenium, and methylmercury: a cross-sectional study using NHANES 2011-2014 data. Am J Clin Nutr 2024; 119:283-293. [PMID: 38110038 DOI: 10.1016/j.ajcnut.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 11/09/2023] [Accepted: 12/14/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Long-chain omega-3 polyunsaturated fatty acids (ω-3 PUFAs) are reported to be beneficial for cognition, but limited consumption of some fish is recommended due to high concentrations of heavy metals and persistent organics. OBJECTIVE We aimed to determine whether dietary ω-3 PUFAs from fish consumption are associated with higher cognitive scores in older adults and explored the associations of mixtures of ω-3 PUFAs and blood concentrations of lead, cadmium, selenium, and methylmercury on cognitive performance. METHODS We conducted a cross-sectional study with data from the NHANES 2011-2014, assessing cognitive scores of immediate recall, delayed recall, and executive function in adults ≥60 y (n = 3123). We performed multivariate linear regressions and mixture models utilizing the quantile-based g-computation method to identify associations between monthly fish consumption or dietary ω-3 PUFAs with blood concentrations of lead, cadmium, methyl mercury, and selenium on cognitive scores. RESULTS Fish consumption had significant positive associations with all 3 cognitive scores, whereas dietary ω-3 PUFAs were only significantly associated with the Digit Symbol Substitution Test (DSST) scores. Mixture analysis showed significant positive associations with DSST scores for fish consumption (β: 0.88; 95% CI: 0.48, 1.29) and dietary ω-3 PUFAs (β: 0.41; 95% CI: 0.03, 0.78) with positive component weights for fish consumption, dietary ω-3 PUFAs, and blood selenium and negative component weight for blood cadmium concentrations. CONCLUSIONS Our findings support dietary recommendations for older adults to consume fish to maintain cognitive function, likely due to biomolecular actions of ω-3 PUFAs that increase neuronal membrane fluidity, have antioxidation activity, and restore cell damage. The combination of selenium and fish consumption or ω-3 PUFAs was associated with reduced decline in cognitive scores and less negative associations from exposures to lead, cadmium, and mercury compounds.
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Affiliation(s)
- Nozomi Sasaki
- Institute for Health and the Environment, University at Albany, Rensselaer, NY, United States.
| | - Laura E Jones
- Institute for Health and the Environment, University at Albany, Rensselaer, NY, United States; Department of Biostatistics and Epidemiology, School of Public Health, University at Albany, Rensselaer, NY, United States; Center for Biostatistics, Bassett Research Institute, Cooperstown, NY, United States
| | - David O Carpenter
- Institute for Health and the Environment, University at Albany, Rensselaer, NY, United States
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Lin YY, Meng L, Guo FJ, Zhang XH, Yang DD, Yao XC, Jin MJ, Wang JB, Tang ML, Chen K. Association between whole blood essential trace elements and cognitive function in older adults. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 261:115114. [PMID: 37311392 DOI: 10.1016/j.ecoenv.2023.115114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/09/2023] [Accepted: 06/05/2023] [Indexed: 06/15/2023]
Abstract
BACKGROUND Essential trace elements (ETEs) are essential nutrients for keeping the nervous system functioning. Associations between ETEs and cognitive function are still inconclusive and limited. OBJECTIVES We aimed to investigate the individual and joint associations between ETEs and cognitive function among older adults. METHODS A population (N = 2181) at an average age≥ 65 from Yiwu cohort in China was available for this study. Whole blood chromium (Cr), selenium (Se), manganese (Mn), and copper (Cu) concentrations were measured by inductively coupled plasma mass spectrometry (ICP-MS). Cognitive function was assessed using the Mini-Mental State Examination (MMSE), consisting of five specific cognitive domains: orientation, registry, attention and calculation, recall, and language and praxis. Linear regression, restricted cubic spline (RCS) analysis, and Bayesian kernel machine regression (BKMR) were used to analyze the individual and joint associations between ETEs and cognitive function. RESULTS The association between Cr and MMSE score presented an inverted-U shape (Q3 versus Q1: β = 0.774, 95 % CI: 0.297, 1.250; Q4 versus Q1: β = 0.481, 95 % CI: 0.006, 0.956); and Cr was especially associated with the registry, recall, and language and praxis. Per IQR (36.32 μg/L) increase of Se was positively associated with the MMSE score (β = 0.497, 95 % CI: 0.277, 0.717) and all five cognitive domains. The BKMR showed that the dose-response association between Se and cognitive function increased initially and then decreased with increasing Se concentration when fixed the other ETEs in median. ETEs mixture was positively associated with cognitive function, and Se (posterior inclusion probabilities, PIPs = 0.915) was the most important contributor within the ETEs mixture. CONCLUSIONS The nonlinear association between Cr and cognitive function suggested further exploration of an appropriate concentration range for ETEs. A positive association between mixed ETEs and cognitive function is a reminder that their joint association should be considered. Further prospective studies or intervention studies are warranted to validate our findings in the future.
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Affiliation(s)
- Yao-Yao Lin
- Department of Public Health, Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Lin Meng
- Department of Public Health, Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Fan-Jia Guo
- Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xin-Han Zhang
- Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Dan-Dan Yang
- Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xue-Cheng Yao
- Department of Public Health, The Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Ming-Juan Jin
- Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Jian-Bing Wang
- Department of Public Health, National Clinical Research Center for Child Health of Children's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Meng-Ling Tang
- Department of Public Health, Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
| | - Kun Chen
- Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
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Guevara Agudelo FA, Leblanc N, Bourdeau-Julien I, St-Arnaud G, Lacroix S, Martin C, Flamand N, Veilleux A, Di Marzo V, Raymond F. Impact of selenium on the intestinal microbiome-eCBome axis in the context of diet-related metabolic health in mice. Front Immunol 2022; 13:1028412. [PMID: 36439185 PMCID: PMC9692131 DOI: 10.3389/fimmu.2022.1028412] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/25/2022] [Indexed: 07/30/2024] Open
Abstract
Dietary micronutrients act at the intestinal level, thereby influencing microbial communities, the host endocannabinoidome, and immune and anti-oxidative response. Selenium (Se) is a trace element with several health benefits. Indeed, Se plays an important role in the regulation of enzymes with antioxidative and anti-inflammatory activity as well as indicators of the level of oxidative stress, which, together with chronic low-grade inflammation, is associated to obesity. To understand how Se variations affect diet-related metabolic health, we fed female and male mice for 28 days with Se-depleted or Se-enriched diets combined with low- and high-fat/sucrose diets. We quantified the plasma and intestinal endocannabinoidome, profiled the gut microbiota, and measured intestinal gene expression related to the immune and the antioxidant responses in the intestinal microenvironment. Overall, we show that intestinal segment-specific microbiota alterations occur following high-fat or low-fat diets enriched or depleted in Se, concomitantly with modifications of circulating endocannabinoidome mediators and changes in cytokine and antioxidant enzyme expression. Specifically, Se enrichment was associated with increased circulating plasma levels of 2-docosahexaenoyl-glycerol (2-DHG), a mediator with putative beneficial actions on metabolism and inflammation. Others eCBome mediators also responded to the diets. Concomitantly, changes in gut microbiota were observed in Se-enriched diets following a high-fat diet, including an increase in the relative abundance of Peptostreptococcaceae and Lactobacillaceae. With respect to the intestinal immune response and anti-oxidative gene expression, we observed a decrease in the expression of proinflammatory genes Il1β and Tnfα in high-fat Se-enriched diets in caecum, while in ileum an increase in the expression levels of the antioxidant gene Gpx4 was observed following Se depletion. The sex of the animal influenced the response to the diet of both the gut microbiota and endocannabinoid mediators. These results identify Se as a regulator of the gut microbiome and endocannabinoidome in conjunction with high-fat diet, and might be relevant to the development of new nutritional strategies to improve metabolic health and chronic low-grade inflammation associated to metabolic disorders.
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Affiliation(s)
- Fredy Alexander Guevara Agudelo
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Nadine Leblanc
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Isabelle Bourdeau-Julien
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Gabrielle St-Arnaud
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Sébastien Lacroix
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Cyril Martin
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Medicine, Institut Universitaire de Cardiologie et Pneumologie de Quebec, Université Laval, Québec, QC, Canada
| | - Nicolas Flamand
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Medicine, Institut Universitaire de Cardiologie et Pneumologie de Quebec, Université Laval, Québec, QC, Canada
| | - Alain Veilleux
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
| | - Vincenzo Di Marzo
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
- Faculty of Medicine, Institut Universitaire de Cardiologie et Pneumologie de Quebec, Université Laval, Québec, QC, Canada
| | - Frédéric Raymond
- Centre Nutrition, santé et société (NUTRISS), and Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec, QC, Canada
- Canada Excellence Research Chair on the Microbiome – Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec, QC, Canada
- Faculty of Agriculture and Food Sciences, Université Laval, Québec, QC, Canada
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Effects of Regular Brazil Nut ( Bertholletia excelsa H.B.K.) Consumption on Health: A Systematic Review of Clinical Trials. Foods 2022; 11:foods11182925. [PMID: 36141050 PMCID: PMC9498495 DOI: 10.3390/foods11182925] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 11/17/2022] Open
Abstract
The Brazil nut (BN) is a promising food due to its numerous health benefits, but it is still necessary to systematically review the scientific evidence on these benefits. Thus, we examined the effects of regular BN consumption on health markers in humans according to the health state (with specific diseases or not) of the subjects. PubMed, Embase®, and Scielo databases were used to search for clinical trials. The PRISMA guideline was used to report the review, and the risk of bias for all studies was assessed. Twenty-four studies were included in the present review, of which fifteen were non-randomized. BNs were consumed in the context of a habitual free-living diet in all studies. Improvement in antioxidant status through increased levels of selenium and/or glutathione peroxidase activity in plasma, serum, whole blood, and/or erythrocytes was observed in all studies that evaluated antioxidant status, regardless of the health state of the sample. In addition, healthy subjects improved lipid markers and fasting glucose. Subjects with obesity had improvement in markers of lipid metabolism. Subjects with type 2 diabetes mellitus or dyslipidemia improved oxidative stress or DNA damage. Subjects undergoing hemodialysis benefited greatly from BN consumption, as they improved lipid profile markers, oxidative stress, inflammation, and thyroid function. Older adults with mild cognitive impairment improved verbal fluency and constructional praxis, and controversial results regarding the change in a marker of lipid peroxidation were observed in subjects with coronary artery disease. In conclusion, the benefits of BN consumption were found in different pathways of action and study populations.
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Zhang Y, Gao H, Zheng W, Xu H. Current understanding of the interactions between metal ions and Apolipoprotein E in Alzheimer's disease. Neurobiol Dis 2022; 172:105824. [PMID: 35878744 DOI: 10.1016/j.nbd.2022.105824] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 07/05/2022] [Accepted: 07/19/2022] [Indexed: 11/15/2022] Open
Abstract
Alzheimer's disease (AD), the most common type of dementia in the elderly, is a chronic and progressive neurodegenerative disorder with no effective disease-modifying treatments to date. Studies have shown that an imbalance in brain metal ions, such as zinc, copper, and iron, is closely related to the onset and progression of AD. Many efforts have been made to understand metal-related mechanisms and therapeutic strategies for AD. Emerging evidence suggests that interactions of brain metal ions and apolipoprotein E (ApoE), which is the strongest genetic risk factor for late-onset AD, may be one of the mechanisms for neurodegeneration. Here, we summarize the key points regarding how metal ions and ApoE contribute to the pathogenesis of AD. We further describe the interactions between metal ions and ApoE in the brain and propose that their interactions play an important role in neuropathological alterations and cognitive decline in AD.
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Affiliation(s)
- Yanhui Zhang
- Department of Tissue Engineering, China Medical University, Shenyang, China
| | - Huiling Gao
- Institute of Neuroscience, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Wei Zheng
- Department of Histology and Embryology, China Medical University, Shenyang, China
| | - He Xu
- Department of Anatomy, Histology and Embryology, School of Medicine, Shenzhen University, Shenzhen, China.
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Leirós M, Amenedo E, Rodríguez M, Pazo-Álvarez P, Franco L, Leis R, Martínez-Olmos MÁ, Arce C. Cognitive Status and Nutritional Markers in a Sample of Institutionalized Elderly People. Front Aging Neurosci 2022; 14:880405. [PMID: 35686024 PMCID: PMC9171327 DOI: 10.3389/fnagi.2022.880405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Background Since many of the risk factors for cognitive decline can be modified by diet, the study of nutrition and its relationships with cognitive status in aging has increased considerably in recent years. However, there are hardly any studies that have assessed cognitive status using a comprehensive set of neuropsychological tests along with measures of functional capacity and mood and that have related it to nutritional status measured from several nutritional parameters that have shown its relationships with cognitive function. Objective To test the differences in depressive symptomatology and in several measures of nutritional status between three groups classified according to their cognitive status (CS hereafter). Method One hundred thirteen participants from nursing homes in Galicia, Spain, underwent a comprehensive neuropsychological examination, including a general screening test (MMSE) and tests for different cognitive domains along with measures of activities of daily living (ADL) and assessment of depressive symptomatology (GDS-SF). According to established clinical criteria, participants were divided into three CS groups, Cognitively Intact (CI), Mild Cognitive Impairment (MCI), and All-Cause Dementia (ACD). Nutritional status was also examined using blood-derived measures, body mass index (BMI) and a nutritional screening test (MNA-SF). Differences between CS groups in all nutritional variables were studied by one-way ANOVAs with post-hoc Bonferroni correction or Kruskal-Wallis with Games-Howell post-hoc correction when appropriate. Multinomial logistic regression was also applied to test the association between nutritional variables and CS. Results Differences between CS groups were statistically significant for depressive symptomatology, vitamin A and D, albumin, selenium (Se), uric acid (UA), and BMI. The results of multinomial logistic regression found positive associations between groups with better CS and higher concentrations of vitamins A and D, transthyretin (TTR), albumin, Se, and UA, while negative associations were found for BMI. Conclusion Higher serum levels of vitamin A, vitamin D, TTR, albumin, Se, and UA could act as protective factors against cognitive decline, whereas higher BMI could act as a risk factor.
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Affiliation(s)
- María Leirós
- Research Group in Cognitive and Affective Neuroscience (NECEA), Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela, A Coruña, Spain
| | - Elena Amenedo
- Research Group in Cognitive and Affective Neuroscience (NECEA), Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela, A Coruña, Spain
| | - Marina Rodríguez
- Research Group in Cognitive and Affective Neuroscience (NECEA), Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela, A Coruña, Spain
| | - Paula Pazo-Álvarez
- Research Group in Cognitive and Affective Neuroscience (NECEA), Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela, A Coruña, Spain
| | - Luis Franco
- Economic Analysis and Modeling Group, Instituto de Estudios y Desarrollo de Galicia (IDEGA), Santiago de Compostela, Spain
| | - Rosaura Leis
- Pediatric Gastroenterology, Hepatology and Nutrition Unit, Hospital Clínico Universitario de Santiago, Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Unit of Investigation in Nutrition, Growth and Human Development of Galicia, Department of Forensic Sciences, Pathological Anatomy, Gynecology and Obstetrics, and Pediatrics, University of Santiago de Compostela, Santiago de Compostela, Spain.,CIBEROBN (Physiopathology of Obesity and Nutrition), Institute of Health Carlos III (ISCIII), Madrid, Spain
| | - Miguel-Ángel Martínez-Olmos
- CIBEROBN (Physiopathology of Obesity and Nutrition), Institute of Health Carlos III (ISCIII), Madrid, Spain.,Section of Endocrinology-Nutrition Area, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - Constantino Arce
- Department of Social, Basic and Methodology Psychology, University of Santiago de Compostela, Santiago de Compostela, Spain
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9
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Yan X, Liu K, Sun X, Qin S, Wu M, Qin L, Wang Y, Li Z, Zhong X, Wei X. A cross-sectional study of blood selenium concentration and cognitive function in elderly Americans: National Health and Nutrition Examination Survey 2011-2014. Ann Hum Biol 2021; 47:610-619. [PMID: 33050724 DOI: 10.1080/03014460.2020.1836253] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Cognitive decline can develop into mild cognitive impairment, a high-risk factor in the progression of Alzheimer's disease. The antioxidant micronutrient selenium may have some effect on preventing cognitive decline, but the association between whole blood selenium concentration and cognitive function remains controversial. AIM To investigate the association between whole blood selenium concentration and cognitive function score in elderly Americans. SUBJECTS AND METHODS Data was obtained from the national health and nutrition survey between 2011 and 2014. A general linear model was used to adjust for possible risk factors to analyse the association between blood selenium concentration and cognitive function. RESULTS 2068 participants were included in our study, and the average blood selenium concentration was high at 195.08 μg/L. The risk of lower cognitive scores was higher in people with lower blood selenium concentration (p < 0.05). The lower cognition may also be associated with one or more of the following characteristics: older, male, had a low poverty-income ratio, low education level, and consumed less alcohol. Related conditions such as stroke, diabetes and high blood pressure may also affect cognitive scores. CONCLUSIONS Higher blood selenium is associated with higher cognitive scores in elderly Americans.
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Affiliation(s)
- Xiumin Yan
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Kailiang Liu
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Xiuhong Sun
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Shuang Qin
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Min Wu
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Li Qin
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Yao Wang
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | - Zhongyi Li
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
| | | | - Xiangcai Wei
- Guangdong women and children hospital, Guangzhou, China.,School of Medicine, Jinan University, Guangzhou, China
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10
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Selenite Inhibits Notch Signaling in Cells and Mice. Int J Mol Sci 2021; 22:ijms22052518. [PMID: 33802299 PMCID: PMC7959125 DOI: 10.3390/ijms22052518] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 02/05/2023] Open
Abstract
Selenium is an essential micronutrient with a wide range of biological effects in mammals. The inorganic form of selenium, selenite, is supplemented to relieve individuals with selenium deficiency and to alleviate associated symptoms. Additionally, physiological and supranutritional selenite have shown selectively higher affinity and toxicity towards cancer cells, highlighting their potential to serve as chemotherapeutic agents or adjuvants. At varying doses, selenite extensively regulates cellular signaling and modulates many cellular processes. In this study, we report the identification of Delta–Notch signaling as a previously uncharacterized selenite inhibited target. Our transcriptomic results in selenite treated primary mouse hepatocytes revealed that the transcription of Notch1, Notch2, Hes1, Maml1, Furin and c-Myc were all decreased following selenite treatment. We further showed that selenite can inhibit Notch1 expression in cultured MCF7 breast adenocarcinoma cells and HEPG2 liver carcinoma cells. In mice acutely treated with 2.5 mg/kg selenite via intraperitoneal injection, we found that Notch1 expression was drastically lowered in liver and kidney tissues by 90% and 70%, respectively. Combined, these results support selenite as a novel inhibitor of Notch signaling, and a plausible mechanism of inhibition has been proposed. This discovery highlights the potential value of selenite applied in a pathological context where Notch is a key drug target in diseases such as cancer, fibrosis, and neurodegenerative disorders.
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11
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Singh D, Singh M. Hepatocellular-Targeted mRNA Delivery Using Functionalized Selenium Nanoparticles In Vitro. Pharmaceutics 2021; 13:298. [PMID: 33668320 PMCID: PMC8025905 DOI: 10.3390/pharmaceutics13030298] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/16/2021] [Accepted: 02/19/2021] [Indexed: 02/06/2023] Open
Abstract
Selenium's (Se) chemopreventative and therapeutic properties have attracted attention in nanomedicine. Se nanoparticles (SeNPs) retain these properties of Se while possessing lower toxicity and higher bioavailability, potentiating their use in gene delivery. This study aimed to formulate SeNPs for efficient binding and targeted delivery of FLuc-mRNA to hepatocellular carcinoma cells (HepG2) in vitro. The colorectal adenocarcinoma (Caco-2) and normal human embryonic kidney (HEK293) cells that do not have the asialoorosomucoid receptor (ASGPR) were utilized for comparison. SeNPs were functionalized with chitosan (CS), polyethylene glycol (PEG), and lactobionic acid (LA) for ASGPR targeting on HepG2 cells. Nanoparticles (NPs) and their mRNA-nanocomplexes were characterized by Fourier transform infra-red (FTIR) and UV-vis spectroscopy, transmission electron microscopy (TEM), and nanoparticle tracking analysis (NTA). Gel and fluorescence-based assays assessed the NP's ability to bind and protect FLuc-mRNA. Cytotoxicity was determined using the -(4,5-dimethythiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, while transgene expression was evaluated using the luciferase reporter gene assay. All NPs appeared spherical with sizes ranging 57.2-130.0 nm and zeta potentials 14.9-31.4 mV. NPs bound, compacted, and protected the mRNA from nuclease digestion and showed negligible cytotoxicity in vitro. Targeted gene expression was highest in the HepG2 cells using the LA targeted NPs. These NPs portend to be efficient nanocarriers of nucleic acids and warrant further investigation.
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Affiliation(s)
| | - Moganavelli Singh
- Nano-Gene and Drug Delivery Group, Discipline of Biochemistry, University of KwaZulu-Natal, Private Bag, Durban X54001, South Africa;
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12
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McCarty MF, DiNicolantonio JJ, Lerner A. A Fundamental Role for Oxidants and Intracellular Calcium Signals in Alzheimer's Pathogenesis-And How a Comprehensive Antioxidant Strategy May Aid Prevention of This Disorder. Int J Mol Sci 2021; 22:2140. [PMID: 33669995 PMCID: PMC7926325 DOI: 10.3390/ijms22042140] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 12/13/2022] Open
Abstract
Oxidative stress and increased cytoplasmic calcium are key mediators of the detrimental effects on neuronal function and survival in Alzheimer's disease (AD). Pathways whereby these perturbations arise, and then prevent dendritic spine formation, promote tau hyperphosphorylation, further amplify amyloid β generation, and induce neuronal apoptosis, are described. A comprehensive program of nutraceutical supplementation, comprised of the NADPH oxidase inhibitor phycocyanobilin, phase two inducers, the mitochondrial antioxidant astaxanthin, and the glutathione precursor N-acetylcysteine, may have important potential for antagonizing the toxic effects of amyloid β on neurons and thereby aiding prevention of AD. Moreover, nutraceutical antioxidant strategies may oppose the adverse impact of amyloid β oligomers on astrocyte clearance of glutamate, and on the ability of brain capillaries to export amyloid β monomers/oligomers from the brain. Antioxidants, docosahexaenoic acid (DHA), and vitamin D, have potential for suppressing microglial production of interleukin-1β, which potentiates the neurotoxicity of amyloid β. Epidemiology suggests that a health-promoting lifestyle, incorporating a prudent diet, regular vigorous exercise, and other feasible measures, can cut the high risk for AD among the elderly by up to 60%. Conceivably, complementing such lifestyle measures with long-term adherence to the sort of nutraceutical regimen outlined here may drive down risk for AD even further.
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Affiliation(s)
| | | | - Aaron Lerner
- Chaim Sheba Medical Center, The Zabludowicz Research Center for Autoimmune Diseases, Tel Hashomer 5262000, Israel
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13
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Gerardo B, Cabral Pinto M, Nogueira J, Pinto P, Almeida A, Pinto E, Marinho-Reis P, Diniz L, Moreira PI, Simões MR, Freitas S. Associations between Trace Elements and Cognitive Decline: An Exploratory 5-Year Follow-Up Study of an Elderly Cohort. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E6051. [PMID: 32825289 PMCID: PMC7503463 DOI: 10.3390/ijerph17176051] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/12/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022]
Abstract
Trace elements (TE) homeostasis is crucial in normal brain functioning. Although imbalances have the potential to exacerbate events leading neurodegenerative diseases, few studies have directly addressed the eventual relationships between TE levels in the human body and future cognitive status. The present study aimed to assess how different TE body-levels relate to cognitive decline. This exploratory research included a study-group (RES) of 20 elderly individuals living in two Portuguese geographical areas of interest (Estarreja; Mértola), as well as a 20 subjects neuropsychological control-group (CTR). Participants were neuropsychologically assessed through the Mini Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA) and the RES group was biomonitored for TE through fingernail analysis. After 5 years, the cognitive assessments were repeated. Analyses of the RES neuropsychological data showed an average decrease of 6.5 and 5.27 points in MMSE and MoCA, respectively, but TE contents in fingernails were generally within the referenced values for non-exposed individuals. Higher levels of Nickel and Selenium significantly predicted lesser cognitive decline within 5 years. Such preliminary results evidence an association between higher contents of these TE and higher cognitive scores at follow-up, suggesting their contribution to the maintenance of cognitive abilities. Future expansion of the present study is needed in order to comprehensively assess the potential benefits of these TE.
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Affiliation(s)
- Bianca Gerardo
- Center for Research in Neuropsychology and Cognitive and Behavioral Intervention (CINEICC), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal; (J.N.); (M.R.S.); (S.F.)
- Psychological Assessment and Psychometrics Laboratory (PsyAssessmentLab), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal;
| | - Marina Cabral Pinto
- Geobiotec Research Centre, Department of Geosciences, University of Aveiro, 3810-193 Aveiro, Portugal; (M.C.P.); (P.M.-R.)
| | - Joana Nogueira
- Center for Research in Neuropsychology and Cognitive and Behavioral Intervention (CINEICC), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal; (J.N.); (M.R.S.); (S.F.)
- Psychological Assessment and Psychometrics Laboratory (PsyAssessmentLab), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal;
| | - Paula Pinto
- Psychological Assessment and Psychometrics Laboratory (PsyAssessmentLab), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal;
| | - Agostinho Almeida
- LAQV/REQUIMTE, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (A.A.); (E.P.); (L.D.)
| | - Edgar Pinto
- LAQV/REQUIMTE, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (A.A.); (E.P.); (L.D.)
- Department of Environmental Health, School of Health, P.Porto, CISA/Research Center in Environment and Health, 4200-072 Porto, Portugal
| | - Paula Marinho-Reis
- Geobiotec Research Centre, Department of Geosciences, University of Aveiro, 3810-193 Aveiro, Portugal; (M.C.P.); (P.M.-R.)
- Departamento de Ciências da Terra, Instituto de Ciências da Terra, Polo da Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Luísa Diniz
- LAQV/REQUIMTE, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (A.A.); (E.P.); (L.D.)
| | - Paula I. Moreira
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, 3004-504 Coimbra, Portugal;
- Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Mário R. Simões
- Center for Research in Neuropsychology and Cognitive and Behavioral Intervention (CINEICC), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal; (J.N.); (M.R.S.); (S.F.)
- Psychological Assessment and Psychometrics Laboratory (PsyAssessmentLab), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal;
| | - Sandra Freitas
- Center for Research in Neuropsychology and Cognitive and Behavioral Intervention (CINEICC), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal; (J.N.); (M.R.S.); (S.F.)
- Psychological Assessment and Psychometrics Laboratory (PsyAssessmentLab), Faculty of Psychology and Educational Sciences (FPCEUC), Univ Coimbra, 3000-115 Coimbra, Portugal;
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14
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Kütük SG, Nazıroğlu M. Selenium Diminishes Docetaxel-Induced Cell Death, Oxidative Stress, and Inflammation in the Laryngotracheal Epithelium of the Mouse. Biol Trace Elem Res 2020; 196:184-194. [PMID: 31729642 DOI: 10.1007/s12011-019-01914-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/20/2019] [Indexed: 01/31/2023]
Abstract
Docetaxel (DOCX) kills tumor cells through the formation of microtubules, calcium ion influx, apoptosis, and inflammation. However, DOCX has adverse effect on normal tissues through the production of reactive oxygen species (ROS), despite the adverse effect was inhibited by antioxidants. We investigated the protective role of selenium against DOCX-induced apoptosis and mitochondrial oxidative injury in laryngotracheal epithelial (LARYN) cells of mice. Thirty-two mice were divided into four groups (n = 8). The first group was used as a control. The second and third groups were treated with sodium selenite (Na-Sel) and DOCX, respectively. The fourth group was the combined group of Na-Sel and DOCX. At the end of the experiment, LARYN mucosa and cells were obtained from the mice. In the LARYN cells, the cell viability level was low in DOCX group, although glutathione peroxidase activity and cell viability level were increased by the treatment of Na-Sel. Increased lipid peroxidation, intracellular ROS, mitochondrial membrane depolarization, cell death levels, TNF-α, IL-1β, IL-6, caspase -3, and -9 activities in the DOCX group of LARYN cells were diminished by the treatment of Na-Sel. In conclusion, DOCX increased mitochondrial ROS, cell death, and inflammation in the LARYN cells, although the increase was reduced in the cells by Na-Sel treatment. DOCX-induced adverse oxidant, inflammatory, and apoptotic effects in the tissue might be reduced by the Na-Sel treatment.
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Affiliation(s)
- Sinem Gökçe Kütük
- Department of Otorhinolaryngology, Aydın State Hospital, Aydın, Turkey
| | - Mustafa Nazıroğlu
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey.
- Drug Discovery Unit, BSN Health, Analyses, Innovation, Consultancy, Organization, Agriculture and Industry LTD, Göller Bölgesi Teknokenti, Isparta, Turkey.
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15
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Xue Q, Zhou Y, Gu H, Xie X, Hou F, Liu Q, Wu H, Zhu K, Wan Z, Song R. Urine metals concentrations and dyslexia among children in China. ENVIRONMENT INTERNATIONAL 2020; 139:105707. [PMID: 32289584 DOI: 10.1016/j.envint.2020.105707] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/05/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Exposures to heavy metals has been linked to many developmental disorders. However, few studies have investigated the effects of exposure and co-exposure to metals on dyslexia, especially with regard to dyslexics in China. OBJECTIVES To investigate the association between urine metal concentrations and dyslexia in a case-control study among children in China. METHODS A case-control study was conducted in the Tongji Reading Environment and Dyslexia (READ) research program. A total of 228 dyslexics and 228 controls were matched on gender, age (within one year), and grade. The concentrations of 21 urine metals were measured by an inductively coupled plasma-mass spectrometer (ICP-MS). Multivariable conditional logistic regression models were applied to estimate the adjusted odds ratios (ORs) of Chinese dyslexia. RESULTS After adjusting for potential confounders, two metals (selenium and argentum) were significantly associated with dyslexia in single-metal multivariable models. Argentum was positively associated with the risk of dyslexia, while selenium was negatively associated. In the multiple-metal model, compared with extreme quartiles, the ORs (95% CIs) for selenium was 0.36 (95% CI: 0.14-0.93; Ptrend = 0.029). In the joint association analysis, children with higher levels of urine argentum and lower level of urine selenium had a significantly higher risk of dyslexia than those with low levels of argentum and selenium (OR = 5.06, 95% CI: 1.67-18.84). CONCLUSIONS The findings suggest that exposure to selenium and argentum may relate to dyslexia in China. Longitudinal studies are needed to further evaluate these relationships and investigate potential mechanisms.
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Affiliation(s)
- Qi Xue
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yu Zhou
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Huaiting Gu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xinyan Xie
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Fang Hou
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qi Liu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hao Wu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Kaiheng Zhu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zihao Wan
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ranran Song
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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16
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[Selenium and zinc: "antioxidants" for healthy aging?]. Z Gerontol Geriatr 2020; 53:295-302. [PMID: 32468295 DOI: 10.1007/s00391-020-01735-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/04/2020] [Indexed: 12/24/2022]
Abstract
Selenium and zinc are essential trace elements and an inadequate dietary intake has been implicated in the decline of immune and cognitive functions in aged persons and in the pathogenesis of age-related disorders. Both micronutrients are often marketed as "antioxidants" in mineral supplements; however, neither selenium nor zinc are antioxidants per se but they may exert beneficial effects as components of enzymes and other proteins that catalyze redox reactions and/or are involved in the maintenance of redox homeostasis. According to epidemiological data older individuals have an increased risk of developing deficiencies in the selenium and zinc status; however, such statistical correlations in epidemiological studies do not imply a causal association. Intervention trials are scarce and have yielded inconsistent and sometimes even adverse results. It should also be noted that the observed deficiencies in micronutrients may not necessarily be attributable to inadequate dietary intake as the absorption and distribution within the body might also be influenced by factors such as medications or interaction with other food ingredients. Thus, any dietary supplementation should be implemented with caution and persons who wish to take mineral supplements should first seek medical advice. This article discusses the role of selenium and zinc in biological antioxidant systems, summarizes findings on the supply and supplementation of aged persons with these trace elements and on the influence they may exert on aging-related health issues, such as cognitive decline and type 2 diabetes mellitus.
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17
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Berry T, Abohamza E, Moustafa AA. A disease-modifying treatment for Alzheimer's disease: focus on the trans-sulfuration pathway. Rev Neurosci 2020; 31:319-334. [PMID: 31751299 DOI: 10.1515/revneuro-2019-0076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 08/31/2019] [Indexed: 12/16/2022]
Abstract
High homocysteine levels in Alzheimer's disease (AD) result from low activity of the trans-sulfuration pathway. Glutathione levels are also low in AD. L-cysteine is required for the synthesis of glutathione. The synthesis of coenzyme A (CoA) requires L-cysteine, which is synthesized via the trans-sulfuration pathway. CoA is required for the synthesis of acetylcholine and appropriate cholinergic neurotransmission. L-cysteine is required for the synthesis of molybdenum-containing proteins. Sulfite oxidase (SUOX), which is a molybdenum-containing protein, could be dysregulated in AD. SUOX detoxifies the sulfites. Glutaminergic neurotransmission could be dysregulated in AD due to low levels of SUOX and high levels of sulfites. L-cysteine provides sulfur for iron-sulfur clusters. Oxidative phosphorylation (OXPHOS) is heavily dependent on iron-sulfur proteins. The decrease in OXPHOS seen in AD could be due to dysregulations of the trans-sulfuration pathway. There is a decrease in aconitase 1 (ACO1) in AD. ACO1 is an iron-sulfur enzyme in the citric acid cycle that upon loss of an iron-sulfur cluster converts to iron regulatory protein 1 (IRP1). With the dysregulation of iron-sulfur cluster formation ACO1 will convert to IRP1 which will decrease the 2-oxglutarate synthesis dysregulating the citric acid cycle and also dysregulating iron metabolism. Selenomethionine is also metabolized by the trans-sulfuration pathway. With the low activity of the trans-sulfuration pathway in AD selenoproteins will be dysregulated in AD. Dysregulation of selenoproteins could lead to oxidant stress in AD. In this article, we propose a novel treatment for AD that addresses dysregulations resulting from low activity of the trans-sulfuration pathway and low L-cysteine.
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Affiliation(s)
- Thomas Berry
- School of Social Sciences and Psychology, Western Sydney University, 2 Bullecourt Ave, Milperra, 2214 Sydney, New South Wales, Australia
| | - Eid Abohamza
- Department of Social Sciences, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - Ahmed A Moustafa
- School of Social Sciences and Psychology, Western Sydney University, 2 Bullecourt Ave, Milperra, 2214 Sydney, New South Wales, Australia
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18
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Robberecht H, De Bruyne T, Davioud-Charvet E, Mackrill J, Hermans N. Selenium Status in Elderly People: Longevity and Age-Related Diseases. Curr Pharm Des 2020; 25:1694-1706. [PMID: 31267854 DOI: 10.2174/1381612825666190701144709] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 06/18/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Selenium (Se) is a trace element active in selenoproteins, which can regulate oxidative stress. It is generally perceived as an import factor for maintaining health in the elderly. METHODS The goal of this review is to discuss selenium concentration in biological samples, primarily serum or plasma, as a function of age and its relation with longevity. The elemental level in various age-related diseases is reviewed. CONCLUSION Highest selenium values were observed in healthy adults, while in an elderly population significantly lower concentrations were reported. Variables responsible for contradictory findings are mentioned. Risk and benefits of Se-supplementation still remain under debate.
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Affiliation(s)
- Harry Robberecht
- Research Group NatuRA, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | - Tess De Bruyne
- Research Group NatuRA, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | - Elisabeth Davioud-Charvet
- Laboratoire d'Innovation Moleculaire et Application (LIMA), UMR7042 CNRSUnistra- UHA, European School of Chemistry, Polymers and Materials (ECPM), 25, rue Becquerel, F-67087 Strasbourg, France
| | - John Mackrill
- Department of Physiology, School of Medicine, University College Cork, Western Gateway Building, Western Road, Cork, T12XF62, Ireland
| | - Nina Hermans
- Research Group NatuRA, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610 Antwerp, Belgium
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19
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Li J, Lo K, Shen G, Feng YQ, Huang YQ. Gender difference in the association of serum selenium with all-cause and cardiovascular mortality. Postgrad Med 2020; 132:148-155. [PMID: 31810414 DOI: 10.1080/00325481.2019.1701864] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objectives: The relationship between selenium and all-cause mortality has been inconsistent from observational studies and clinical trials. The present study aimed to reveal the relationship between serum selenium and all-cause and cardiovascular disease (CVD) mortality and the potential gender differences.Methods: All participants were recruited from the 1999-2006 National Health and Nutrition Examination Survey (NHANES). Participants with available serum selenium data were followed up until 31 December 2015. Cox proportional hazards models were performed to estimate adjusted hazard ratios (HRs) and 95% confidence intervals (CI) for all-cause and CVD mortality according to baseline selenium level in quartiles. Multivariable-adjusted spline curves were performed to detect non-linearity in relationships.Results: There were 2,903 subjects (50.7% female) included in this study. The mean age was 61.9 ± 13.7 years, and the mean selenium levels were 136.4 ± 19.6 ug/L. A total of 858 (29.6%) cases of all-cause mortality and 126 (4.3%) CVD mortality occurred during the median follow-up duration of 10.2 years. On average, deceased participants had lower serum selenium levels, (135.1 ± 22.3 vs. 137.0 ± 18.4 ug/L; P = 0.02). Serum selenium was also lower in female than male (134.7 ± 19.7 vs. 138.2 ± 19.4 ug/L; P < 0.01). Comparing with the lowest quartile, participants with the highest selenium concentration had a lower risk for all-cause (HR: 0.60, 95%CI: 0.45, 0.78; P < 0.01, P for trend<0.01) and CVD mortality (HR: 0.73, 95%CI: 0.37, 1.43; P = 0.36, P for trend = 0.90). Selenium was significantly associated with all-cause and CVD mortality among both males and females, but only associated with CVD mortality in among females.Conclusion: This study demonstrated significant relationship between serum selenium and all-cause mortality in both genders, but the relationship with CVD mortality was only significant in females.
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Affiliation(s)
- Jie Li
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, South China University of Technology School of Medicine, Guangzhou, China
| | - Kenneth Lo
- Centre for Global Cardiometabolic Health, Department of Epidemiology, Brown University, Providence, RI, USA
| | - Geng Shen
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, South China University of Technology School of Medicine, Guangzhou, China
| | - Ying-Qing Feng
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, South China University of Technology School of Medicine, Guangzhou, China
| | - Yu-Qing Huang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, South China University of Technology School of Medicine, Guangzhou, China
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Cai Z, Zhang J, Li H. Selenium, aging and aging-related diseases. Aging Clin Exp Res 2019; 31:1035-1047. [PMID: 30511318 DOI: 10.1007/s40520-018-1086-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 11/24/2018] [Indexed: 02/07/2023]
Abstract
Selenium is an essential trace element in the human body and plays an important role in the body via selenoprotein, which contains selenium. Selenoproteins (glutathione peroxidase, thioredoxin reductase, methionine sulfoxide reductase1 and endoplasmic reticulum-selenoproteins, etc.) have antioxidant effects and are involved in regulating antioxidant activities. Aging is an inevitable process and is always accompanied by aging-related diseases. Reactive oxygen species are important initial factors in aging and aging-related diseases. Selenium contributes to the alleviation of reduced reactive oxygen species-mediated inflammation, reduced DNA damage and prolonged telomere length and thereby plays roles in fighting aging and preventing aging-related diseases. In the elderly, aging-related diseases include neuropsychiatric diseases, tumors, cardiovascular diseases, and skin aging, among others. Selenium supplementation is an important strategy for anti-aging and the prevention of aging-related diseases and is of great significance for the elderly. However, with the accumulation of related research, selenium supplementation does not necessarily contribute to the prevention of aging and aging-related diseases. It is believed that a low level of selenium is beneficial to the human body. Thus, the effect of selenium on human aging and aging-related diseases is still controversial. This paper reviews the research progress and objective role of selenium in aging and aging-related diseases.
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Affiliation(s)
- Zhonglin Cai
- Department of Urology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Jianzhong Zhang
- Department of Urology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Hongjun Li
- Department of Urology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing, 100730, China.
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Varikasuvu SR, Prasad V S, Kothapalli J, Manne M. Brain Selenium in Alzheimer's Disease (BRAIN SEAD Study): a Systematic Review and Meta-Analysis. Biol Trace Elem Res 2019; 189:361-369. [PMID: 30171594 DOI: 10.1007/s12011-018-1492-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/21/2018] [Indexed: 12/29/2022]
Abstract
Oxidative stress has been found to be implicated in the development of Alzheimer's disease (AD). In this meta-analytic review, we compared tissue levels between AD and non-AD brains of selenium, an important biological trace element well known for its vital role in the brain function. We included 14 studies with 40 observations on selenium concentrations in AD and control brains. The effect size as standardized mean difference (SMD) was generated using review manager 5.3. Random-effects meta-analysis indicated a decrease (SMD = - 0.42) in brain tissue selenium levels in AD as compared to non-AD controls. The subgroup meta-analysis demonstrated that the selenium levels were decreased in the temporal, hippocampal, and cortex regions in AD. The funnel plot with Egger's (p = 0.88) and Begg's tests (p = 0.24) detected no significant publication bias. The results of sensitivity analysis indicated that no single study/observation had significantly influenced the overall outcome. This meta-analysis provides consolidated evidence for a significant decrease of selenium status in AD brains compared to controls. In line with the evidence supporting selenium's antioxidant role and the involvement of oxidative stress in AD development, this meta-analysis supports new therapeutic strategies aimed at brain tissue selenium homeostasis in AD.
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Affiliation(s)
- Seshadri Reddy Varikasuvu
- Faculty of Medicine, Department of Biochemistry, Maheshwara Medical College & Hospital, Hyderabad, Telangana, 502307, India.
| | - Satya Prasad V
- Faculty of Medicine, Department of Anatomy, Maheshwara Medical College & Hospital, Hyderabad, Telangana, 502307, India
| | - Jyothinath Kothapalli
- Faculty of Medicine, Department of Anatomy, Maheshwara Medical College & Hospital, Hyderabad, Telangana, 502307, India
| | - Munikumar Manne
- Biomedical Informatics Center (BMIC), National Institute of Nutrition-Indian Council of Medical Research, Hyderabad, Telangana, India
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Baş E, Nazıroğlu M. Treatment with melatonin and selenium attenuates docetaxel-induced apoptosis and oxidative injury in kidney and testes of mice. Andrologia 2019; 51:e13320. [PMID: 31131920 DOI: 10.1111/and.13320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/27/2019] [Accepted: 04/28/2019] [Indexed: 12/26/2022] Open
Abstract
Docetaxel (DTX) has been used in cancer treatments for several decades, but it results in many adverse apoptotic effects through excessive production of reactive oxygen species (ROS) in some tissue including the kidney and testes. We aimed to investigate potential modulatory roles of melatonin (MEL) and selenium (Se) against DTX-induced apoptosis and oxidative injury in the testes and kidney of mice. Thirty-two mice were divided into four equal groups as control, DTX, DTX + MEL and DTX + Se. DTX group was treated with a single intraperitoneal dose of DTX. After DTX treatment, MEL and Se were administered to the mice in the DTX + MEL and DTX + Se groups for 7 days respectively. Increased lipid peroxidation, ROS, apoptosis, caspase-3 and caspase-9 activities in the kidney and testes of the DTX group were diminished by treatment with MEL and Se. DTX-induced decreases in vitamin E (α- and γ-tocopherol), glutathione peroxidase and reduced glutathione levels in the kidney and testis were increased following MEL and Se treatments. In conclusion, our data show that MEL and Se can act as modulators against DTX-induced apoptosis and oxidative damage in the kidney and testis through up-regulation of glutathione and vitamin E and down-regulation of caspase pathways.
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Affiliation(s)
- Ercan Baş
- Department of Urology, School of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey.,Drug Discovery Unit, BSN Health, Analysis and Innovation Ltd. Inc. Teknokent, Isparta, Turkey
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Kelleher JL, Rodriguez AD, McGregor KM, Serra MC. Differences in dietary recall and subjective physical functioning status in stroke survivors with self-reported cognitive impairment. Top Stroke Rehabil 2019; 26:307-311. [PMID: 30907282 DOI: 10.1080/10749357.2019.1593611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Little is known about the dietary intake of these nutrients in stroke survivors, who often experience greater difficulties with physical functioning due to cognitive impairment. OBJECTIVES To explore whether dietary intake and physical function differ between those with and without self-report cognitive impairment. METHODS The present study analyzes data from the 2011-2012 and 2013-2014 National Health and Nutrition Examination Survey. Individuals were included if they self-reported a stroke and had data regarding cognitive impairment (self-reported "periods of confusion or memory problems") and dietary intake from 24-hr recalls (N = 360). A subset had handgrip strength (N = 330) and questionnaire data regarding the presence of 19 different functional limitations (N = 187). RESULTS Of the 360 stroke survivor participants (66 ± 1 years, 53% female, mean±SEM), 48% reported cognitive impairment. Dietary intake of polyunsaturated fatty acids was 19% lower (p = 0.01), with a trend for 13% lower vitamin B6 intake (p = 0.07) in those with cognitive impairment compared to those who did not. Those with cognitive impairment had lower handgrip strength and reported twice as many functional limitations (p's<0.01). CONCLUSION A lower intake of polyunsaturated fat and vitamin B6 may be associated with cognitive function, ultimately affecting physical functioning, post-stroke. It is possible that differing stroke severity and difficulty recalling dietary habits could have affected the present findings. Therefore, further research is needed to determine if interventions designed to modify polyunsaturated fat and vitamin B6 intakes are able to influence cognitive and physical function in stroke survivors with varying degrees of functional and cognitive deficits.
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Affiliation(s)
- Jessica L Kelleher
- a VARRD Center for Visual and Neurocognitive Rehabilitation , Atlanta VA Medical Center , Decatur , GA , USA
| | - Amy D Rodriguez
- a VARRD Center for Visual and Neurocognitive Rehabilitation , Atlanta VA Medical Center , Decatur , GA , USA.,b School of Medicine , Emory University , Atlanta , GA , USA
| | - Keith M McGregor
- a VARRD Center for Visual and Neurocognitive Rehabilitation , Atlanta VA Medical Center , Decatur , GA , USA.,b School of Medicine , Emory University , Atlanta , GA , USA
| | - Monica C Serra
- a VARRD Center for Visual and Neurocognitive Rehabilitation , Atlanta VA Medical Center , Decatur , GA , USA.,b School of Medicine , Emory University , Atlanta , GA , USA
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Bebars GM, Afifi MF, Mahrous DM, Okaily NE, Mounir SM, Mohammed EA. Assessment of some micronutrients serum levels in children with severe acute malnutrition with and without cerebral palsy- A follow up case control study. CLINICAL NUTRITION EXPERIMENTAL 2019. [DOI: 10.1016/j.yclnex.2018.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Rutjes AWS, Denton DA, Di Nisio M, Chong L, Abraham RP, Al‐Assaf AS, Anderson JL, Malik MA, Vernooij RWM, Martínez G, Tabet N, McCleery J. Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life. Cochrane Database Syst Rev 2018; 12:CD011906. [PMID: 30556597 PMCID: PMC6353240 DOI: 10.1002/14651858.cd011906.pub2] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Vitamins and minerals play multiple functions within the central nervous system which may help to maintain brain health and optimal cognitive functioning. Supplementation of the diet with various vitamins and minerals has been suggested as a means of maintaining cognitive function, or even of preventing dementia, in later life. OBJECTIVES To evaluate the effects of vitamin and mineral supplementation on cognitive function in cognitively healthy people aged 40 years or more. SEARCH METHODS We searched ALOIS, the Cochrane Dementia and Cognitive Improvement Group's (CDCIG) specialised register, as well as MEDLINE, Embase, PsycINFO, CINAHL, ClinicalTrials.gov and the WHO Portal/ICTRP from inception to 26th January 2018. SELECTION CRITERIA We included randomised controlled trials that evaluated the cognitive effects on people aged 40 years or more of any vitamin or mineral supplements taken by mouth for at least three months. DATA COLLECTION AND ANALYSIS Study selection, data extraction, and quality assessments were done in duplicate. Vitamins were considered broadly in the categories of B vitamins, antioxidant vitamins, and combinations of both. Minerals were considered separately, where possible. If interventions and outcomes were considered sufficiently similar, then data were pooled. In order to separate short-term cognitive effects from possible longer-term effects on the trajectory of cognitive decline, data were pooled for various treatment durations from 3 months to 12 months and up to 10 years or more. MAIN RESULTS In total, we included 28 studies with more than 83,000 participants. There were some general limitations of the evidence. Most participants were enrolled in studies which were not designed primarily to assess cognition. These studies often had no baseline cognitive assessment and used only brief cognitive assessments at follow-up. Very few studies assessed the incidence of dementia. Most study reports did not mention adverse events or made only very general statements about them. Only 10 studies had a mean follow-up > 5 years. Only two studies had participants whose mean age was < 60 years at baseline. The risk of bias in the included studies was generally low, other than a risk of attrition bias for longer-term outcomes. We considered the certainty of the evidence behind almost all results to be moderate or low.We included 14 studies with 27,882 participants which compared folic acid, vitamin B12, vitamin B6, or a combination of these to placebo. The majority of participants were aged over 60 years and had a history of cardio- or cerebrovascular disease. We found that giving B vitamin supplements to cognitively healthy adults, mainly in their 60s and 70s, probably has little or no effect on global cognitive function at any time point up to 5 years (SMD values from -0.03 to 0.06) and may also have no effect at 5-10 years (SMD -0.01). There were very sparse data on adverse effects or on incidence of cognitive impairment or dementia.We included 8 studies with 47,840 participants in which the active intervention was one or more of the antioxidant vitamins: ß-carotene, vitamin C or vitamin E. Results were mixed. For overall cognitive function, there was low-certainty evidence of benefit associated with ß-carotene after a mean of 18 years of treatment (MD 0.18 TICS points, 95% CI 0.01 to 0.35) and of vitamin C after 5 years to 10 years (MD 0.46 TICS points, 95% CI 0.14 to 0.78), but not at earlier time points. From two studies which reported on dementia incidence, there was low-certainty evidence of no effect of an antioxidant vitamin combination or of vitamin E, either alone or combined with selenium. One of the included studies had been designed to look for effects on the incidence of prostate cancer; it found a statistically significant increase in prostate cancer diagnoses among men taking vitamin E.One trial with 4143 participants compared vitamin D3 (400 IU/day) and calcium supplements to placebo. We found low- to moderate-certainty evidence of no effect of vitamin D3 and calcium supplements at any time-point up to 10 years on overall cognitive function (MD after a mean of 7.8 years -0.1 MMSE points, 95% CI -0.81 to 0.61) or the incidence of dementia (HR 0.94, 95% CI 0.72 to 1.24). A pilot study with 60 participants used a higher dose of vitamin D3 (4000 IU on alternate days) and found preliminary evidence that this dose probably has no effect on cognitive function over six months.We included data from one trial of zinc and copper supplementation with 1072 participants. There was moderate-certainty evidence of little or no effect on overall cognitive function (MD 0.6 MMSE points, 95% CI -0.19 to 1.39) or on the incidence of cognitive impairment after 5 years to 10 years. A second smaller trial provided no usable data, but reported no cognitive effects of six months of supplementation with zinc gluconate.From one study with 3711 participants, there was low-certainty evidence of no effect of approximately five years of selenium supplementation on the incidence of dementia (HR 0.83, 95% CI 0.61 to 1.13).Finally, we included three trials of complex supplements (combinations of B vitamins, antioxidant vitamins, and minerals) with 6306 participants. From the one trial which assessed overall cognitive function, there was low-certainty evidence of little or no effect on the TICS (MD after a mean of 8.5 years 0.12, 95% CI -0.14 to 0.38). AUTHORS' CONCLUSIONS We did not find evidence that any vitamin or mineral supplementation strategy for cognitively healthy adults in mid or late life has a meaningful effect on cognitive decline or dementia, although the evidence does not permit definitive conclusions. There were very few data on supplementation starting in midlife (< 60 years); studies designed to assess cognitive outcomes tended to be too short to assess maintenance of cognitive function; longer studies often had other primary outcomes and used cognitive measures which may have lacked sensitivity. The only positive signals of effect came from studies of long-term supplementation with antioxidant vitamins. These may be the most promising for further research.
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Affiliation(s)
- Anne WS Rutjes
- University of BernInstitute of Social and Preventive Medicine (ISPM)Mittelstrasse 43BernBernSwitzerland3012
- University of BernInstitute of Primary Health Care (BIHAM)Mittelstrasse 43BernBernSwitzerland3012
| | - David A Denton
- Sussex Partnership NHS Foundation TrustSpecialist Older People's ServicesUckfield Community HosptialFramfield RoadUckfieldUKTN22 5AW
| | - Marcello Di Nisio
- University "G. D'Annunzio" of Chieti‐PescaraDepartment of Medicine and Ageing SciencesVia dei Vestini 31Chieti ScaloItaly66013
| | | | - Rajesh P Abraham
- Surrey and Borders Partnership NHS Foundation TrustCommunity Mental Health Team for Older People:Waverley11‐13 Ockford RoadGuildfordUKGU7 1QU
| | - Aalya S Al‐Assaf
- Newcastle UniversityNIHR Innovation ObservatorySuite A, 4th Floor, Time CentralGallowgateNewcastle Upon TyneUKNE1 4BF
| | - John L Anderson
- Brighton and Sussex Medical School, University of BrightonDepartment of Medical EducationWatson BuildingFalmerUKBN1 9PH
| | - Muzaffar A Malik
- Brighton and Sussex Medical School, University of BrightonDepartment of Medical Education (Postgraduate)Room 341, Mayfield HouseFalmerUKBN1 9PH
| | - Robin WM Vernooij
- Iberoamerican Cochrane CentreC/ Sant Antoni Maria Claret 167BarcelonaBarcelonaSpain08025
| | - Gabriel Martínez
- Universidad de AntofagastaFaculty of Medicine and DentistryAvenida Argentina 2000AntofagastaChile127001
| | - Naji Tabet
- Brighton and Sussex Medical SchoolCentre for Dementia StudiesMayfield House, University of BrightonFalmerBrightonUKBN1 9PH
| | - Jenny McCleery
- Oxford Health NHS Foundation TrustElms CentreOxford RoadBanburyOxfordshireUKOX16 9AL
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Solovyev N, Drobyshev E, Bjørklund G, Dubrovskii Y, Lysiuk R, Rayman MP. Selenium, selenoprotein P, and Alzheimer's disease: is there a link? Free Radic Biol Med 2018; 127:124-133. [PMID: 29481840 DOI: 10.1016/j.freeradbiomed.2018.02.030] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/18/2018] [Accepted: 02/22/2018] [Indexed: 12/13/2022]
Abstract
The essential trace element, selenium (Se), is crucial to the brain but it may be potentially neurotoxic, depending on dosage and speciation; Se has been discussed for decades in relation to Alzheimer's disease (AD). Selenoprotein P (SELENOP) is a secreted heparin-binding glycoprotein which serves as the main Se transport protein in mammals. In vivo studies showed that this protein might have additional functions such as a contribution to redox regulation. The current review focuses on recent research on the possible role of SELENOP in AD pathology, based on model and human studies. The review also briefly summarizes results of epidemiological studies on Se supplementation in relation to brain diseases, including PREADViSE, EVA, and AIBL. Although mainly positive effects of Se are assessed in this review, possible detrimental effects of Se supplementation or exposure, including potential neurotoxicity, are also mentioned. In relation to AD, various roles of SELENOP are discussed, i.e. as the means of Se delivery to neurons, as an antioxidant, in cytoskeleton assembly, in interaction with redox-active metals (copper, iron, and mercury) and with misfolded proteins (amyloid-beta and hyperphosphorylated tau-protein).
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Affiliation(s)
- Nikolay Solovyev
- St. Petersburg State University, Institute of Chemistry, St. Petersburg, Russian Federation.
| | - Evgenii Drobyshev
- Universität Potsdam, Institut für Ernährungswissenschaft, Potsdam, Germany
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway.
| | - Yaroslav Dubrovskii
- St. Petersburg State University, Institute of Chemistry, St. Petersburg, Russian Federation
| | - Roman Lysiuk
- Department of Pharmacognosy and Botany, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Margaret P Rayman
- Department of Nutritional Sciences, University of Surrey, Guildford, UK
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McCleery J, Abraham RP, Denton DA, Rutjes AWS, Chong L, Al‐Assaf AS, Griffith DJ, Rafeeq S, Yaman H, Malik MA, Di Nisio M, Martínez G, Vernooij RWM, Tabet N. Vitamin and mineral supplementation for preventing dementia or delaying cognitive decline in people with mild cognitive impairment. Cochrane Database Syst Rev 2018; 11:CD011905. [PMID: 30383288 PMCID: PMC6378925 DOI: 10.1002/14651858.cd011905.pub2] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Vitamins and minerals have many functions in the nervous system which are important for brain health. It has been suggested that various different vitamin and mineral supplements might be useful in maintaining cognitive function and delaying the onset of dementia. In this review, we sought to examine the evidence for this in people who already had mild cognitive impairment (MCI). OBJECTIVES To evaluate the effects of vitamin and mineral supplementation on cognitive function and the incidence of dementia in people with mild cognitive impairment. SEARCH METHODS We searched ALOIS, the Cochrane Dementia and Cognitive Improvement Group's (CDCIG) specialised register, as well as MEDLINE, Embase, PsycINFO, CENTRAL, CINAHL, LILACs, Web of Science Core Collection, ClinicalTrials.gov, and the WHO Portal/ICTRP, from inception to 25 January 2018. SELECTION CRITERIA We included randomised or quasi-randomised, placebo-controlled trials which evaluated orally administered vitamin or mineral supplements in participants with a diagnosis of mild cognitive impairment and which assessed the incidence of dementia or cognitive outcomes, or both. We were interested in studies applicable to the general population of older people and therefore excluded studies in which participants had severe vitamin or mineral deficiencies. DATA COLLECTION AND ANALYSIS We sought data on our primary outcomes of dementia incidence and overall cognitive function and on secondary outcomes of episodic memory, executive function, speed of processing, quality of life, functional performance, clinical global impression, adverse events, and mortality. We conducted data collection and analysis according to standard Cochrane systematic review methods. We assessed the risk of bias of included studies using the Cochrane 'Risk of bias' assessment tool. We grouped vitamins and minerals according to their putative mechanism of action and, where we considered it to be clinically appropriate, we pooled data using random-effects methods. We used GRADE methods to assess the overall quality of evidence for each comparison and outcome. MAIN RESULTS We included five trials with 879 participants which investigated B vitamin supplements. In four trials, the intervention was a combination of vitamins B6, B12, and folic acid; in one, it was folic acid only. Doses varied. We considered there to be some risks of performance and attrition bias and of selective outcome reporting among these trials. Our primary efficacy outcomes were the incidence of dementia and scores on measures of overall cognitive function. None of the trials reported the incidence of dementia and the evidence on overall cognitive function was of very low-quality. There was probably little or no effect of B vitamins taken for six to 24 months on episodic memory, executive function, speed of processing, or quality of life. The evidence on our other secondary clinical outcomes, including harms, was very sparse or very low-quality. There was evidence from one study that there may be a slower rate of brain atrophy over two years in participants taking B vitamins. The same study reported subgroup analyses based on the level of serum homocysteine (tHcy) at baseline and found evidence that B vitamins may improve episodic memory in those with tHcy above the median at baseline.We included one trial (n = 516) of vitamin E supplementation. Vitamin E was given as 1000 IU of alpha-tocopherol twice daily. We considered this trial to be at risk of attrition and selective reporting bias. There was probably no effect of vitamin E on the probability of progression from MCI to Alzheimer's dementia over three years (HR 1.02; 95% CI 0.74 to 1.41; n = 516; 1 study, moderate-quality evidence). There was also no evidence of an effect at intermediate time points. The available data did not allow us to conduct analyses, but the authors reported no significant effect of three years of supplementation with vitamin E on overall cognitive function, episodic memory, speed of processing, clinical global impression, functional performance, adverse events, or mortality (five deaths in each group). We considered this to be low-quality evidence.We included one trial (n = 256) of combined vitamin E and vitamin C supplementation and one trial (n = 26) of supplementation with chromium picolinate. In both cases, there was a single eligible cognitive outcome, but we considered the evidence to be very low-quality and so could not be sure of any effects. AUTHORS' CONCLUSIONS The evidence on vitamin and mineral supplements as treatments for MCI is very limited. Three years of treatment with high-dose vitamin E probably does not reduce the risk of progression to dementia, but we have no data on this outcome for other supplements. Only B vitamins have been assessed in more than one RCT. There is no evidence for beneficial effects on cognition of supplementation with B vitamins for six to 24 months. Evidence from a single study of a reduced rate of brain atrophy in participants taking vitamin B and a beneficial effect of vitamin B on episodic memory in those with higher tHcy at baseline warrants attempted replication.
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Affiliation(s)
- Jenny McCleery
- Oxford Health NHS Foundation TrustElms CentreOxford RoadBanburyOxfordshireUKOX16 9AL
| | - Rajesh P Abraham
- Surrey and Borders Partnership NHS Foundation TrustCommunity Mental Health Team for Older People:Waverley11‐13 Ockford RoadGuildfordUKGU7 1QU
| | - David A Denton
- Sussex Partnership NHS Foundation TrustSpecialist Older People's ServicesUckfield Community HosptialFramfield RoadUckfieldUKTN22 5AW
| | - Anne WS Rutjes
- Fondazione "Università G. D'Annunzio"Centre for Systematic ReviewsVia dei Vestini 31ChietiChietiItaly66100
- University of BernInstitute of Social and Preventive Medicine (ISPM)Mittelstrasse 43BernBernSwitzerland3012
| | | | - Aalya S Al‐Assaf
- Newcastle UniversityNIHR Innovation ObservatorySuite A, 4th Floor, Time CentralGallowgateNewcastle Upon TyneUKNE1 4BF
| | - Daniel J Griffith
- Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation TrustDepartment of Nutrition and DieteticsMindelsohn WayEdgbastonBirminghamWest MidlandsUKB15 2GW
| | - Shireen Rafeeq
- Central Park Medical CollegeCommunity MedicineCentral Park Housing Scheme, Ferozepur Road, Kahna NauLahorePunjabPakistan53100
| | - Hakan Yaman
- Faculty of Medicine, Akdeniz UniversityDepartment of Family MedicineAntalyaTurkey07059
| | - Muzaffar A Malik
- Brighton and Sussex Medical School, University of BrightonDepartment of Medical Education (Postgraduate)Room 341, Mayfield HouseFalmerUKBN1 9PH
| | - Marcello Di Nisio
- University "G. D'Annunzio" of Chieti‐PescaraDepartment of Medicine and Ageing SciencesVia dei Vestini 31Chieti ScaloItaly66013
| | - Gabriel Martínez
- Universidad de AntofagastaFaculty of Medicine and DentistryAvenida Argentina 2000AntofagastaChile127001
- Iberoamerican Cochrane CentreSant Antoni Maria Claret 167BarcelonaSpain08025
| | - Robin WM Vernooij
- Iberoamerican Cochrane CentreSant Antoni Maria Claret 167BarcelonaSpain08025
| | - Naji Tabet
- Brighton and Sussex Medical SchoolCentre for Dementia StudiesMayfield House, University of BrightonFalmerBrightonUKBN1 9PH
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Gatineau E, Cluzet S, Krisa S, Papet I, Migne C, Remond D, Dardevet D, Polakof S, Richard T, Mosoni L. Effects of nutritional state, aging and high chronic intake of sucrose on brain protein synthesis in rats: modulation of it by rutin and other micronutrients. Food Funct 2018; 9:2922-2930. [DOI: 10.1039/c7fo01953j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Brain protein synthesis was decreased during aging, restored by micronutrients, and unchanged by sucrose, in correlation with variations in TNF-α gene expression.
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Affiliation(s)
- Eva Gatineau
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
| | - Stéphanie Cluzet
- GESVAB EA 3675
- ISVV
- Université de Bordeaux
- F-33882 Villenave d'Ornon Cedex
- France
| | - Stéphanie Krisa
- GESVAB EA 3675
- ISVV
- Université de Bordeaux
- F-33882 Villenave d'Ornon Cedex
- France
| | - Isabelle Papet
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
| | - Carole Migne
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
| | - Didier Remond
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
| | | | - Sergio Polakof
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
| | - Tristan Richard
- GESVAB EA 3675
- ISVV
- Université de Bordeaux
- F-33882 Villenave d'Ornon Cedex
- France
| | - Laurent Mosoni
- Université Clermont Auvergne
- INRA
- UNH
- Unité de Nutrition Humaine
- PFEM
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29
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Zhang ZH, Wen L, Wu QY, Chen C, Zheng R, Liu Q, Ni JZ, Song GL. Long-Term Dietary Supplementation with Selenium-Enriched Yeast Improves Cognitive Impairment, Reverses Synaptic Deficits, and Mitigates Tau Pathology in a Triple Transgenic Mouse Model of Alzheimer's Disease. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:4970-4979. [PMID: 28578584 DOI: 10.1021/acs.jafc.7b01465] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by multiple histopathological changes in the brain and by impairments in memory and cognitive function. Currently, there is no effective treatment that can halt or reverse the progression of this disease. Here, we explored the effects of 3 months of treatment with selenium-enriched yeast (Se-yeast), which is commonly used as a source of organic selenium (Se) for nutrition, on cognitive dysfunction and neuropathology in the triple transgenic mouse model of AD (3×Tg-AD mice). As the results revealed that Se-yeast significantly improved the spatial learning and memory retention of 3×Tg-AD mice, promoted neuronal activity, attenuated the activation of astrocytes and microglia, mitigated synaptic deficits, and reduced the levels of total tau and phosphorylated tau though inhibiting the activity of GSK-3β, dietary supplementation with Se-yeast exerted multiple beneficial effects on the prevention or treatment of AD. These findings provide evidence of a potentially viable compound for AD treatment.
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Affiliation(s)
- Zhong-Hao Zhang
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Lei Wen
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Qiu-Yan Wu
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Chen Chen
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Rui Zheng
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Qiong Liu
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Jia-Zuan Ni
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
| | - Guo-Li Song
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University , Shenzhen, 518060, China
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30
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Li JL, Li W, Sun XT, Xia J, Li XN, Lin J, Zhang C, Sun XC, Xu SW. Selenophosphate synthetase 1 (SPS1) is required for the development and selenium homeostasis of central nervous system in chicken (Gallus gallus). Oncotarget 2017; 8:35919-35932. [PMID: 28415800 PMCID: PMC5482627 DOI: 10.18632/oncotarget.16283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 03/09/2017] [Indexed: 01/25/2023] Open
Abstract
Selenophosphate synthetase (SPS) is essential for selenoprotein biosynthesis. In two SPS paralogues, SPS1 was only cloned from a cDNA library prepared from avian organ. However, the biological function of SPS1 in chicken central nervous system (CNS) remains largely unclear. To investigate the role of avian SPS1 in the development and selenium (Se) homeostasis of CNS, fertile eggs, chicken embryos, embryo neurons and chicks were employed in this study. The response of SPS1 transcription to the development and Se levels of CNS tissues was analyzed using qRT-PCR. SPS1 gene exists extensively in the development of chicken CNS. The wide expression of avian SPS1 can be controlled by the Se content levels, which suggests that SPS1 is important in the regulation of Se homeostasis. The fundamental mechanism of these effects is that Se alters the half-life and stability of SPS1 mRNA. Therefore, SPS1 exerts an irreplaceable biological function in chicken CNS and Se homeostasis is closely related to the expression of SPS1. These results suggested that SPS1 was required for the development and Se homeostasis of CNS in chicken.
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Affiliation(s)
- Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Wei Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Xue-Tong Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Jun Xia
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Xue-Nan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Jia Lin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Cong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Xiao-Chen Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Shi-Wen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, P. R. China.,Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, P. R. China
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31
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Berger MM, Roussel AM. Complémentation ou supplémentation en oligo-éléments : qui, pourquoi, comment ? NUTR CLIN METAB 2017. [DOI: 10.1016/j.nupar.2017.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Demirci K, Nazıroğlu M, Övey İS, Balaban H. Selenium attenuates apoptosis, inflammation and oxidative stress in the blood and brain of aged rats with scopolamine-induced dementia. Metab Brain Dis 2017; 32:321-329. [PMID: 27631101 DOI: 10.1007/s11011-016-9903-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/01/2016] [Indexed: 10/21/2022]
Abstract
A potent antioxidant, selenium might modulate dementia-induced progression of brain and blood oxidative and apoptotic injuries. The present study explores whether selenium protects against experimental dementia (scopolamine, SCOP)-induced brain, and blood oxidative stress, apoptosis levels, and cytokine production in rats. Thirty-two rats were equally divided into four groups. The first group was used as an untreated control. The second group was treated with SCOP to induce dementia. The third and fourth groups received 1.5 mg/kg selenium (sodium selenite) and SCOP + selenium, respectively. Dementia was induced in the second and forth groups by intraperitoneal SCOP (1 mg/kg) administration. Brain, plasma, and erythrocyte lipid peroxidation levels as well as plasma TNF-α, interleukin (IL)-1β, and IL-4 levels were high in the SCOP group though they were low in selenium treatments. Selenium and selenium + SCOP treatments increased the lowered glutathione peroxidase activity, reduced glutathione, vitamins A and E concentrations in the brain, erythrocytes and plasma of the SCOP group. Apoptotic value expressions as active caspase-3, procaspase-9, and PARP were also increased by SCOP, while they were decreased by selenium and selenium + SCOP treatments. In conclusion, selenium induced protective effects against experimental dementia-induced brain, and blood oxidative injuries and apoptosis through regulation of cytokine production, vitamin E, glutathione concentrations, and glutathione peroxidase activity.
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Affiliation(s)
- Kadir Demirci
- Department of Psychiatry, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Department of Neuroscience, Institute of Health Science, Suleyman Demirel University, Isparta, Turkey.
- Neuroscience Research Center, University of Suleyman Demirel, -32260, Isparta, TR, Turkey.
| | - İshak Suat Övey
- Department of Neuroscience, Institute of Health Science, Suleyman Demirel University, Isparta, Turkey
| | - Hasan Balaban
- Department of Psychiatry, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
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33
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Gashu D, Stoecker BJ, Bougma K, Adish A, Haki GD, Marquis GS. Stunting, selenium deficiency and anemia are associated with poor cognitive performance in preschool children from rural Ethiopia. Nutr J 2016; 15:38. [PMID: 27067274 PMCID: PMC4828825 DOI: 10.1186/s12937-016-0155-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 04/05/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Anthropometric characteristics and iron status affect cognitive performance in children. In addition, selenium can influence cognitive outcomes; protection of the brain from oxidative stress and its role in thyroid hormone metabolism are putative mechanisms. METHODS To investigate their association with cognitive performance, anthropometric indicators, iron biomarkers, and serum selenium of children (n = 541) of 54-60mo of age from rural Ethiopia were assessed. Cognitive assessment was conducted with the administration of two reasoning subtests of the Wechsler Preschool and Primary Scale of Intelligence and the school readiness test. RESULTS Stunting was found in 41.4 % of children, 28.7 % were underweight, and 6.3 % were wasted. The mean score of stunted children was lower than that of non-stunted children on non-verbal reasoning (7.0 ± 3.2vs7.9 ± 3.1; p = 0.01) and the school readiness tests (4.3 ± 2.2 vs 3.3 ± 2.1; p < 0.001). Compared to non-anemic children, anemic children had lower score for the verbal reasoning test (9.5 ± 1.7 vs 8.9 ± 2.2; p = 0.02). However, except for hemoglobin, none of the iron biomarkers had significant associations with the cognitive score of the study children (p > 0.05). Selenium deficient children had lower scores on all cognitive tests than normal children (p < 0.05). CONCLUSION The present study finding linking chronic undernutrition and micronutrient deficiency to cognitive deficits suggests the need for designing effective intervention programmes to control for protein energy malnutrition and micronutrient deficiency and address cognitive development in children.
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Affiliation(s)
- Dawd Gashu
- Center for Food Science and Nutrition, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia.
| | - Barbara J Stoecker
- Department of Nutritional Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Karim Bougma
- School of Dietetics and Human Nutrition, McGill University, 21111 Lakeshore Road, CINE Building, Sainte Anne-de-Bellevue, QC, H9X 3 V9, Canada
| | | | - Gulelat D Haki
- Department of Food Science and Technology, University of Botswana, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana
| | - Grace S Marquis
- School of Dietetics and Human Nutrition, McGill University, 21111 Lakeshore Road, CINE Building, Sainte Anne-de-Bellevue, QC, H9X 3 V9, Canada
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34
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Onakpoya IJ, Heneghan CJ. The efficacy of supplementation with the novel medical food, Souvenaid, in patients with Alzheimer's disease: A systematic review and meta-analysis of randomized clinical trials. Nutr Neurosci 2015; 20:219-227. [DOI: 10.1080/1028415x.2015.1110899] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Igho J. Onakpoya
- Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, UK
| | - Carl J. Heneghan
- Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, UK
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35
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Al-Assaf AS, Denton DA, Abraham RP, Rutjes AWS, Chong LY, Anderson JL, Malik MA, Tabet N. Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in late life. Cochrane Database Syst Rev 2015. [DOI: 10.1002/14651858.cd011906] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Aalya S Al-Assaf
- Brighton and Sussex Medical School, University of Brighton; Division of Medical Education; Mayfield House Falmer UK BN1 9PH
| | - David A Denton
- Sussex Partnership NHS Foundation Trust; Specialist Older People's Services; Uckfield Community Hosptial Framfield Road Uckfield UK TN22 5AW
| | - Rajesh P Abraham
- Cognitive Treatment and Research Unit, Sussex Partnership NHS Foundation Trust; Old Age Psychiatry; Grove House Southfield Road Crowborough UK TN6 1HB
| | - Anne WS Rutjes
- Fondazione "Università G. D'Annunzio"; Centre for Systematic Reviews; Via dei Vestini 31 Chieti Chieti Italy 66100
- University of Bern; Institute of Social and Preventive Medicine (ISPM); Finkenhubelweg 11 Bern Bern Switzerland 3012
| | | | - John L Anderson
- Brighton and Sussex Medical School, University of Brighton; Division of Medical Education; Mayfield House Falmer UK BN1 9PH
| | - Muzaffar A Malik
- Brighton and Sussex Medical School, University of Brighton; Department of Medical Education (Postgraduate); Room 341, Mayfield House Falmer UK BN1 9PH
| | - Naji Tabet
- Brighton and Sussex Medical School; Postgraduate Medicine; Mayfield House, University of Brighton Falmer Brighton UK BN1 9PH
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36
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Denton DA, Abraham RP, Al-Assaf AS, Rutjes AWS, Chong LY, Anderson JL, Malik MA, Tabet N. Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid life. Cochrane Database Syst Rev 2015. [DOI: 10.1002/14651858.cd011904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- David A Denton
- Sussex Partnership NHS Foundation Trust; Specialist Older People's Services; Uckfield Community Hosptial Framfield Road Uckfield UK TN22 5AW
| | - Rajesh P Abraham
- Cognitive Treatment and Research Unit, Sussex Partnership NHS Foundation Trust; Old Age Psychiatry; Grove House Southfield Road Crowborough UK TN6 1HB
| | - Aalya S Al-Assaf
- Brighton and Sussex Medical School, University of Brighton; Division of Medical Education; Mayfield House Falmer UK BN1 9PH
| | - Anne WS Rutjes
- Fondazione "Università G. D'Annunzio"; Centre for Systematic Reviews; Via dei Vestini 31 Chieti Chieti Italy 66100
- University of Bern; Institute of Social and Preventive Medicine (ISPM); Finkenhubelweg 11 Bern Bern Switzerland 3012
| | | | - John L Anderson
- Brighton and Sussex Medical School, University of Brighton; Division of Medical Education; Mayfield House Falmer UK BN1 9PH
| | - Muzaffar A Malik
- Brighton and Sussex Medical School, University of Brighton; Department of Medical Education (Postgraduate); Room 341, Mayfield House Falmer UK BN1 9PH
| | - Naji Tabet
- Brighton and Sussex Medical School; Postgraduate Medicine; Mayfield House, University of Brighton Falmer Brighton UK BN1 9PH
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37
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Abraham RP, Denton DA, Al-Assaf AS, Rutjes AWS, Chong LY, Malik MA, Tabet N. Vitamin and mineral supplementation for prevention of dementia or delaying cognitive decline in people with mild cognitive impairment. Cochrane Database Syst Rev 2015. [DOI: 10.1002/14651858.cd011905] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Rajesh P Abraham
- Cognitive Treatment and Research Unit, Sussex Partnership NHS Foundation Trust; Old Age Psychiatry; Grove House Southfield Road Crowborough UK TN6 1HB
| | - David A Denton
- Sussex Partnership NHS Foundation Trust; Specialist Older People's Services; Uckfield Community Hosptial Framfield Road Uckfield UK TN22 5AW
| | - Aalya S Al-Assaf
- Brighton and Sussex Medical School, University of Brighton; Division of Medical Education; Mayfield House Falmer UK BN1 9PH
| | - Anne WS Rutjes
- Fondazione "Università G. D'Annunzio"; Centre for Systematic Reviews; Via dei Vestini 31 Chieti Chieti Italy 66100
- University of Bern; Institute of Social and Preventive Medicine (ISPM); Finkenhubelweg 11 Bern Bern Switzerland 3012
| | | | - Muzaffar A Malik
- Brighton and Sussex Medical School, University of Brighton; Department of Medical Education (Postgraduate); Room 341, Mayfield House Falmer UK BN1 9PH
| | - Naji Tabet
- Brighton and Sussex Medical School; Postgraduate Medicine; Mayfield House, University of Brighton Falmer Brighton UK BN1 9PH
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38
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Kahya MC, Naziroğlu M, Çiğ B. Melatonin and selenium reduce plasma cytokine and brain oxidative stress levels in diabetic rats. Brain Inj 2015; 29:1490-6. [DOI: 10.3109/02699052.2015.1053526] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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39
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Ramos P, Santos A, Pinto NR, Mendes R, Magalhães T, Almeida A. Anatomical regional differences in selenium levels in the human brain. Biol Trace Elem Res 2015; 163:89-96. [PMID: 25413879 DOI: 10.1007/s12011-014-0160-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/21/2014] [Indexed: 01/28/2023]
Abstract
The role of selenium in human brain physiology, as well as in aging and neurodegenerative processes, remains unclear. Thus, the aim of this study was to establish the "normal" (reference) levels for selenium in the human brain, as well as anatomical regional differences and age-related changes. Using inductively coupled plasma-mass spectrometry after sample microwave-assisted acid digestion, selenium levels were measured in 14 different areas of the brain of adult individuals (n = 42; 71 ± 12, range 50-101 years old) without a known history of neurodegenerative, neurological, or psychiatric disorders. In the whole data set (n = 588; 42 individuals × 14 brain areas), selenium levels ranged from 552 to 1435 ng/g, with a mean ± SD content of 959 ± 178 ng/g (dry weight basis). Selenium distribution across the different brain areas was heterogeneous, with the highest levels in the putamen, parietal inferior lobule, and occipital cortex and the lowest expression in the medulla and cerebellum. Selenium levels were unchanged with aging. Compared with the age-matched control group, significantly increased levels of selenium were found in the globus pallidus, superior temporal gyrus, and frontal cortex of Parkinson's disease (n = 1) and Alzheimer's disease (n = 2) patients. This study provides new data on the anatomical regional differences in selenium levels in the human brain, which will aid future interpretation of studies examining brain tissue affected by neurodegenerative (and other) brain diseases.
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Affiliation(s)
- Patrícia Ramos
- REQUIMTE, Department of Chemical Sciences, Laboratory of Applied Chemistry, Faculty of Pharmacy, Porto University, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
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40
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Surowka AD, Wrobel P, Adamek D, Radwanska E, Szczerbowska-Boruchowska M. Synchrotron radiation based X-ray fluorescence shows changes in the elemental composition of the human substantia nigra in aged brains. Metallomics 2015; 7:1522-31. [DOI: 10.1039/c5mt00154d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Becker NP, Martitz J, Renko K, Stoedter M, Hybsier S, Cramer T, Schomburg L. Hypoxia reduces and redirects selenoprotein biosynthesis. Metallomics 2014; 6:1079-86. [PMID: 24700164 DOI: 10.1039/c4mt00004h] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Selenium deficiency constitutes a risk factor for the incidence and negative course of severe diseases including sepsis, stroke, autoimmune diseases or cancer. In this study, hypoxia is identified as a powerful stimulus to redirect selenoprotein biosynthesis causing reduced selenoprotein P expression and diminished selenium export from hepatocytes in favour of increased biosynthesis of the essential protective intracellular phospholipid hydroperoxide glutathione peroxidase GPX4. Specifically, hypoxia decreases transcript concentrations of central factors controlling selenium and selenocysteine metabolism including selenophosphate synthetase-2, phosphoseryl-tRNA(SerSec) kinase and selenocysteine lyase, which are all proven to be rate-limiting enzymes in selenoprotein biosynthesis. These effects are paralleled by a general decline of selenoprotein expression; however, not all selenoproteins are affected to the same extent by hypoxia, and GPX4 constitutes an exception as its expression becomes slightly increased. Supplemental selenium is able to overcome the hypoxia-dependent down regulation of selenoprotein expression in our cell culture model system, supporting the concept of using selenium as an adjuvant treatment option in severe diseases. Although it remains to be tested whether these effects constitute a hepatocyte-specific response, the selenium-dependent decline of selenoprotein P biosynthesis under hypoxic conditions may explain the progressive selenium deficit developing in severe diseases.
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Affiliation(s)
- Niels-Peter Becker
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, CVK, D-13353 Berlin, Germany.
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42
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Phosphoproteomic profiling of selenate-treated Alzheimer's disease model cells. PLoS One 2014; 9:e113307. [PMID: 25485856 PMCID: PMC4259334 DOI: 10.1371/journal.pone.0113307] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 10/21/2014] [Indexed: 11/19/2022] Open
Abstract
The reversible phosphorylation of proteins regulates most biological processes, while abnormal phosphorylation is a cause or consequence of many diseases including Alzheimer's disease (AD). One of the hallmarks of AD is the formation of neurofibrillary tangles (NFTs), which is composed of hyperphosphorylated tau proteins. Sodium selenate has been recently found to reduce tau hyperphosphorylation and NFTs formation, and to improve spatial learning and motor performance in AD mice. In the current study, the phosphoproteomics of N2aSW cells treated with selenate were investigated. To avoid missing low-abundance phosphoproteins, both the total proteins of cells and the phosphor-enriched proteins were extracted and subjected to the two-dimensional gel electrophoresis with Pro-Q diamond staining and then LC-MS/MS analysis. A total of 65 proteins were altered in phosphorylation level, of which 39 were up-regulated and 26 were down-regulated. All identified phosphoproteins were bioinformatically annotated according to their physiochemical features, subcellular location, and biological function. Most of these significantly changed phosphoproteins are involved in crucial neural processes such as protesome activity, oxidative stress, cysteine and methionine metabolism, and energy metabolism. Furthermore, decreases were found in homocysteine, phosphor-tau and amyloid β upon selenate treatment. Our results suggest that selenate may intervene in the pathological process of AD by altering the phosphorylation of some key proteins involved in oxidative stress, energy metabolism and protein degradation, thus play important roles in maintaining redox homeostasis, generating ATP, and clearing misfolded proteins and aggregates. The present paper provides some new clues to the mechanism of selenate in AD prevention.
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43
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Hurst R, Collings R, Harvey LJ, King M, Hooper L, Bouwman J, Gurinovic M, Fairweather-Tait SJ. EURRECA-Estimating selenium requirements for deriving dietary reference values. Crit Rev Food Sci Nutr 2014; 53:1077-96. [PMID: 23952089 DOI: 10.1080/10408398.2012.742861] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Current reference values for selenium, an essential micronutrient, are based on the intake of selenium that is required to achieve maximal glutathione peroxidase activity in plasma or erythrocytes. In order to assess the evidence of relevance to setting dietary reference values for selenium, the EURRECA Network of Excellence focused on systematic searches, review, and evaluation of (i) selenium status biomarkers and evidence for relationships between intake and status biomarkers, (ii) selenium and health (including the effect of intake and/or status biomarkers on cancer risk, immune function, HIV, cognition, and fertility), (iii) bioavailability of selenium from the diet, and (iv) impact of genotype/single nucleotide polymorphisms on status or health outcomes associated with selenium. The main research outputs for selenium and future research priorities are discussed further in this review.
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Affiliation(s)
- Rachel Hurst
- Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, Norfolk, NR4 7TJ, UK
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Steinbrenner H. Interference of selenium and selenoproteins with the insulin-regulated carbohydrate and lipid metabolism. Free Radic Biol Med 2013; 65:1538-1547. [PMID: 23872396 DOI: 10.1016/j.freeradbiomed.2013.07.016] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/08/2013] [Accepted: 07/09/2013] [Indexed: 01/26/2023]
Abstract
An assumed link between supranutritional intake of the micronutrient selenium (Se) and type 2 diabetes mellitus is discussed controversially. Se concentrations in the habitual diet and in dietary supplements are probably not sufficient to induce overt diabetes in healthy individuals. On the other hand, high plasma Se and selenoprotein P (Sepp1) levels have been found to be associated with biomarkers of an impaired carbohydrate and lipid homeostasis in humans. Moreover, abundant expression of antioxidant selenoproteins due to dietary Se oversupply resulted in hyperinsulinemia and decreased insulin sensitivity in animal models. This review discusses findings from animal and cell culture studies in search of molecular mechanisms underlying an interference of Se and selenproteins such as the Se transport and supply protein Sepp1 and the hydrogen peroxide-reducing selenoenzyme glutathione peroxidase 1 (GPx1) with insulin-controlled metabolic pathways. A probable rationale derives from the positive and negative regulation of both glucose-induced insulin secretion and insulin-induced signaling by hydrogen peroxide. Se status and GPx1 expression have been reported to affect the activity of insulin-antagonistic phosphatases that are regulated by hydrogen peroxide-mediated reversible oxidation of catalytic cysteine residues. GPx1 and/or Sepp1 inhibited phosphorylation (activation) of key mediators in energy metabolism such as protein kinase B (Akt) and AMP-activated protein kinase (AMPK) in liver and/or skeletal muscle. Conversely, a dys-regulated carbohydrate metabolism in diabetes might affect plasma Se and Sepp1 levels, as the hepatic biosynthesis of Sepp1 is suppressed by insulin and stimulated under hyperglycemic conditions.
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Affiliation(s)
- Holger Steinbrenner
- Institute for Biochemistry and Molecular Biology I, Heinrich-Heine-Universität, Düsseldorf, Germany.
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Vinceti M, Mandrioli J, Borella P, Michalke B, Tsatsakis A, Finkelstein Y. Selenium neurotoxicity in humans: bridging laboratory and epidemiologic studies. Toxicol Lett 2013; 230:295-303. [PMID: 24269718 DOI: 10.1016/j.toxlet.2013.11.016] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 11/06/2013] [Accepted: 11/14/2013] [Indexed: 12/14/2022]
Abstract
Selenium is a metalloid of considerable interest in the human from both a toxicological and a nutritional perspective, with a very narrow safe range of intake. Acute selenium intoxication is followed by adverse effects on the nervous system with special clinical relevance, while the neurotoxicity of long-term overexposure is less characterized and recognized. We aimed to address this issue from a public health perspective, focusing on both laboratory studies and the few epidemiologic human studies available, with emphasis on their methodological strengths and limitations. The frequently overlooked differences in toxicity and biological activity of selenium compounds are also outlined. In addition to lethargy, dizziness, motor weakness and paresthesias, an excess risk of amyotrophic lateral sclerosis is the effect on the nervous system which has been more consistently associated with chronic low-level selenium overexposure, particularly to its inorganic compounds. Additional research efforts are needed to better elucidate the neurotoxic effects exerted by selenium overexposure.
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Affiliation(s)
- Marco Vinceti
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy; Trace Element Institute for Unesco Satellite Center, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy.
| | - Jessica Mandrioli
- Department of Neuroscience, University of Modena and Reggio Emilia and Local Health Unit of Modena, Modena, Italy
| | - Paola Borella
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy; Trace Element Institute for Unesco Satellite Center, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Bernhard Michalke
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München - German Research Center for Environmental Health GmbH, Munich, Germany
| | - Aristidis Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Heraklion, Greece
| | - Yoram Finkelstein
- Neurology and Toxicology Service and Unit, Shaare Zedek Medical Center, Jerusalem, Israel
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Wright AD, Stevens E, Ali M, Carroll DW, Brown TM. The neuropsychiatry of scurvy. PSYCHOSOMATICS 2013; 55:179-85. [PMID: 24365538 DOI: 10.1016/j.psym.2013.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/07/2013] [Accepted: 10/08/2013] [Indexed: 12/17/2022]
Affiliation(s)
| | - Elizabeth Stevens
- University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Maysun Ali
- University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - David W Carroll
- Audie L. Murphy Memorial Veterans Administration Center, San Antonio, TX
| | - Thomas M Brown
- Audie L. Murphy Memorial Veterans Administration Center, San Antonio, TX.
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Kim DH, Grodstein F, Rosner B, Kang JH, Cook NR, Manson JE, Buring JE, Willett WC, Okereke OI. Seafood types and age-related cognitive decline in the Women's Health Study. J Gerontol A Biol Sci Med Sci 2013; 68:1255-62. [PMID: 23554464 DOI: 10.1093/gerona/glt037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Seafood consumption may prevent age-related cognitive decline. However, benefits may vary by nutrient contents in different seafood types. We examined associations between total seafood consumption and cognitive decline and whether these associations differ by seafood types. METHODS We conducted a prospective cohort study of 5,988 women (mean age, 72 years) from the Women's Health Study who self-reported seafood intake at Women's Health Study baseline and also participated in telephone assessments of general cognition, verbal memory, and category fluency administered 5.6 years after Women's Health Study baseline and 2 and 4 years thereafter. Primary outcomes were standardized composite scores of global cognition and verbal memory. RESULTS After adjusting for potential confounders, different amounts of total seafood consumption were not associated with changes in global cognition (p = .56) or verbal memory (p = .29). Considering seafood types, however, compared with women consuming less than once-weekly tuna or dark-meat finfish, those with once-weekly or higher consumption had significantly better verbal memory (0.079 standard units; p < .01) after 4 years-a difference comparable to that for women 2.1 years apart in age. There was also a statistically nonsignificant suggestion of better global cognition (p = .13) with once-weekly or higher tuna or dark-meat fish consumption. No significant associations were observed for light-meat finfish or shellfish. CONCLUSIONS The relation of seafood to cognition may depend on the types consumed. Total consumption levels of seafood were unrelated to cognitive change. However, consumption of tuna and dark-meat fish once weekly or higher was associated with lower decline in verbal memory for a period of 4 years.
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Affiliation(s)
- Dae Hyun Kim
- SM, Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 181 Longwood Ave, Boston, MA 02115.
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Steinbrenner H, Sies H. Selenium homeostasis and antioxidant selenoproteins in brain: implications for disorders in the central nervous system. Arch Biochem Biophys 2013; 536:152-7. [PMID: 23500141 DOI: 10.1016/j.abb.2013.02.021] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 10/27/2022]
Abstract
The essential trace element selenium, as selenocysteine, is incorporated into antioxidant selenoproteins such as glutathione peroxidases (GPx), thioredoxin reductases (TrxR) and selenoprotein P (Sepp1). Although comparatively low in selenium content, the brain exhibits high priority for selenium supply and retention under conditions of dietary selenium deficiency. Liver-derived Sepp1 is the major transport protein in plasma to supply the brain with selenium, serving as a "survival factor" for neurons in culture. Sepp1 expression has also been detected within the brain. Presumably, astrocytes secrete Sepp1, which is subsequently taken up by neurons via the apolipoprotein E receptor 2 (ApoER2). Knock-out of Sepp1 or ApoER2 as well as neuron-specific ablation of selenoprotein biosynthesis results in neurological dysfunction in mice. Astrocytes, generally less vulnerable to oxidative stress than neurons, are capable of up-regulating the expression of antioxidant selenoproteins upon brain injury. Occurrence of neurological disorders has been reported occasionally in patients with inadequate nutritional selenium supply or a mutation in the gene encoding selenocysteine synthase, one of the enzymes involved in selenoprotein biosynthesis. In three large trials carried out among elderly persons, a low selenium status was associated with faster decline in cognitive functions and poor performance in tests assessing coordination and motor speed. Future research is required to better understand the role of selenium and selenoproteins in brain diseases including hepatic encephalopathy.
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Affiliation(s)
- Holger Steinbrenner
- Institute for Biochemistry and Molecular Biology I, Heinrich-Heine-University, Düsseldorf, Germany
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