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Bawiec P, Sawicki J, Łasińska-Pracuta P, Czop M, Sowa I, Iłowiecka K, Koch W. In Vitro Evaluation of Bioavailability of Se from Daily Food Rations and Dietary Supplements. Nutrients 2023; 15:nu15061511. [PMID: 36986241 PMCID: PMC10058741 DOI: 10.3390/nu15061511] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Bioavailability refers to a fraction of a substance that is potentially absorbed from the gastrointestinal tract and enters the systemic circulation (blood). This term is related to various substances, including minerals, that are present in a complex matrix of food which is consumed every day as natural products and pharmaceutical preparations, e.g., dietary supplements. The purpose of the study was to assess the bioavailability of Se from selected dietary supplements, with the simultaneous assessment of the effect the diet type (standard, basic and high-residue diets) has on relative bioavailability. The research included a two-stage in vitro model of digestion using cellulose dialysis tubes of the food rations with the addition of dietary supplements. Se was determined using the ICP-OES method. The bioavailability of Se from dietary supplements, in the presence of food matrix, was determined to be within the range of 19.31-66.10%. Sodium selenate was characterized by the highest value of this parameter, followed by organic forms and sodium selenite. The basic diet, characterized by moderate protein and high carbohydrate and fiber contents, positively influenced the bioavailability of Se. The bioavailability of Se was also influenced by the pharmaceutical form of the product-the highest was for tablets, followed by capsules and coated tablets.
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Affiliation(s)
- Piotr Bawiec
- Department of Food and Nutrition, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
| | - Jan Sawicki
- Department of Analytical Chemistry, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
| | - Paulina Łasińska-Pracuta
- Department of Food and Nutrition, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
| | - Marcin Czop
- Department of Clinical Genetics, Medical University of Lublin, Radziwiłłowska 11 Str., 20-080 Lublin, Poland
| | - Ireneusz Sowa
- Department of Analytical Chemistry, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
| | - Katarzyna Iłowiecka
- Department of Food and Nutrition, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
| | - Wojciech Koch
- Department of Food and Nutrition, Medical University of Lublin, 4a Chodźki Str., 20-093 Lublin, Poland
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Selenium Status and Supplementation Effects in Pregnancy—A Study on Mother–Child Pairs from a Single-Center Cohort. Nutrients 2022; 14:nu14153082. [PMID: 35956267 PMCID: PMC9370234 DOI: 10.3390/nu14153082] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 01/27/2023] Open
Abstract
The demand for selenium (Se) increases during pregnancy since this element supports child growth, proper neuronal development and maternal thyroid function. The issue is particularly relevant for populations living in areas with a limited selenium supply, where many pregnant women opt for Se supplementation. The efficiency of this measure is unknown, although it seems vital in the prevention of severe Se deficiency. In order to evaluate this hypothesis, an observational study was conducted in Poland, where Se deficiency is prevalent. Pregnant women were invited to participate in the study and provided serum samples at the end of pregnancy (n = 115). Information on the supplemental intake of micronutrients was recorded in a face-to-face interview. In addition, serum samples were isolated from the cord blood of newborns at delivery (n = 112) and included in the analyses. Thyroid hormone status was evaluated by routine laboratory tests, and Se status was determined by total Se and selenoprotein P (SELENOP) concentrations and extracellular glutathione peroxidase (GPX3) activity. The three parameters of Se status correlated strongly within the group of mothers and within the group of newborns, with an additional significant correlation found among mother–child pairs. One-third of mothers reported additional Se intake, mainly as a component of multi-micronutrient supplements, at a mean (±SD) dosage of 42 ± 14 µg Se/day. Despite this regime, most of the women presented an insufficient Se status, with 79% of mothers displaying serum Se concentrations below 70 µg/L (indicating Se deficiency) and 22% showing levels below 45.9 µg/L (severe Se deficiency). The inadequate Se supply was also reflected in relatively low SELENOP concentrations and GPX3 activity. Neither total Se nor SELENOP or GPX3 levels were significantly higher in the group of mothers reporting the intake of supplements than in the non-supplementing group. Nevertheless, elevated SELENOP concentrations were observed in the subgroup receiving supplements with more than 55 µg/day. We conclude that the self-administered supplementation of small Se dosages was not sufficient to achieve replete Se status in the micronutrient scant area. However, the maternal Se deficit measured by either Se, SELENOP or GPX3 was transferred from mothers to the newborns, as the parameters correlated strongly in the mother–newborn pairs of samples. It is vital to re-evaluate the guidelines concerning pregnancy care and monitoring of micronutrient status during pregnancy, in particular in areas where deficiencies are present.
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Dried Wild-Grown Mushrooms Can Be Considered a Source of Selected Minerals. Nutrients 2022; 14:nu14132750. [PMID: 35807930 PMCID: PMC9269615 DOI: 10.3390/nu14132750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/30/2022] [Accepted: 06/30/2022] [Indexed: 12/19/2022] Open
Abstract
Dried mushrooms might be a source of mineral components, which are indispensable for human health. The aim of this study was to determine the contents of calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), copper (Cu), manganese (Mn), and selenium (Se) in dried wild-grown mushrooms (Boletus edulis and Xerocomus badius) available for sale, and to evaluate these mushrooms’ contribution to the daily reference intake of the studied bioelements. The concentrations of mineral components in the mushroom samples were determined by the flame method (Ca, Mg, Fe, Zn, Cu, Mn) and the electrothermal (Se) atomic absorption spectrometry method. The mean Ca, Mg, Fe, Zn, Cu, Mn (in mg/kg), and Se concentrations (in µg/kg) in B. edulis were 82.1, 964.1, 233.4, 97.9, 25.3, 22.1, and 6501.6, respectively, whereas in X. badius: 67.5, 1060.2, 87.8, 197.2, 33.9, 19.8, and 282.4, respectively. We have shown that dried B. edulis can be considered a source of Se. In the case of the other microelements, the tested mushrooms may serve only as additional supplements. Therefore, the studied species of mushrooms cannot be regarded as potential nutritional sources of the macroelements in question. Consumers should be properly informed about this, which should be guaranteed by appropriate legal regulations.
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Reference Ranges of Selenium in Plasma and Whole Blood for Child-Bearing-Aged Women in China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084908. [PMID: 35457774 PMCID: PMC9028777 DOI: 10.3390/ijerph19084908] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/03/2022] [Accepted: 04/11/2022] [Indexed: 02/05/2023]
Abstract
Selenium (Se) is a “dual-surface” element. Both Se-deficiency and Se-overload have bad effects on humans. The amount of Se in the blood is a good indicator of Se intake, and there are considerable differences in the reference ranges among different regions and populations. The purpose of this study was to establish the age-specific reference interval of blood Se in healthy child-bearing-aged women in China. A total of 187 healthy women aged 18–45 years old were enrolled with strict inclusion criteria from the China Adult Chronic Disease and Nutrition Surveillance (2015 CACDNS) database to establish the reference interval of Se. Plasma and whole-blood Se were detected by inductively coupled plasma mass spectrometry (ICP-MS). The reference range (RR) estimated as P2.5–P97.5 percentiles (geometric mean) was 73.81–140.75 (100.94) μg/L and P2.5–P97.5 percentiles (median) 81.06–164.75 (121.05) μg/L for plasma and whole-blood Se, respectively. The proposed RR of plasma Se in this study was used to evaluate the Se nutritional status of a representative sample of 1950 women of child-bearing age who were randomly selected from 2015 CACDNS. The proportion of Se level lower than P2.5 cut-off value was 24.05%, and there were 5.08% child-bearing-aged women with plasma Se higher than the upper limit of RR. Women in the western and rural areas tend to have lower Se levels.
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Hanć A, Fernandes AR, Falandysz J, Zhang J. Mercury and selenium in developing and mature fruiting bodies of Amanita muscaria. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:60145-60153. [PMID: 34152540 PMCID: PMC8541943 DOI: 10.1007/s11356-021-14740-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 06/01/2021] [Indexed: 05/14/2023]
Abstract
Both mercury (Hg) and selenium (Se) occur in many mushroom species, but the morphological distribution of these elements during different developmental stages of the fruiting bodies is not known. Although Amanita muscaria can be consumed after suitable processing, they are often ignored by mushroom foragers, leaving an abundance for investigative study. Multiple specimens in each of six developmental stages (button to fully mature) were collected in excellent condition during a single morning from the same forested location and composited. With an average of 30 specimens per composite, and low temporal, spatial, and measurement uncertainty, the data are likely to be representative of the typical concentrations of Hg and Se for each developmental stage. Hg (range 0.58-0.74 mg kg-1 dry weight cap; 0.33 to 0.44 mg kg-1 dw stipe) and Se (range 8.3-11 mg kg-1 dw cap; 2.2 to 4.3 mg kg-1 dw stipe) levels were observed to vary during the developmental stages, and the variability may relate to the demands in growth. In common with some other species, the lower stipe concentrations may be consistent with nutrient/contant transport and support functions. Both Hg and Se levels were lowest during periods of maximum sporocarp growth. Selenium occurs at almost an order of magnitude greater levels than Hg. Due to its role in mitigating the effects of Hg toxicity, this property is of significance to those who consume the species either for nutritional, medicinal, or recreational purposes, although the losses of both these elements during processing are not known.
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Affiliation(s)
- Anetta Hanć
- Department of Trace Element Analysis by Spectroscopy Method, Adam Mickiewicz University, Umultowska 89b, 61-614, Poznań, PL, Poland
| | - Alwyn R Fernandes
- School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Jerzy Falandysz
- Environmental Chemistry and Ecotoxicology, University of Gdańsk, Gdańsk, Poland.
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Zaragocilla Campus, 130015, Cartagena, Colombia.
- Medicinal Plants Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650200, China.
| | - Ji Zhang
- Medicinal Plants Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650200, China
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Survival of Embryos and Fry of Sea Trout ( Salmo trutta m . trutta) Growing from Eggs Exposed to Different Concentrations of Selenium during Egg Swelling. Animals (Basel) 2021; 11:ani11102921. [PMID: 34679941 PMCID: PMC8532871 DOI: 10.3390/ani11102921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/29/2021] [Accepted: 10/06/2021] [Indexed: 11/16/2022] Open
Abstract
Adequate selenium (Se) availability enhances the health and growth of organisms, but overdose of it can be harmful and pathogenic. The study's objective was to analyse the impact of short-term exposure of sea trout fertilised eggs to inorganic selenium (SeO2) at concentrations from 0 to 32 mg Se L-1 to find the optimal and toxic dose of Se on early fish development. Se accumulated in the body, embryos' survival rate, and growth in the first four months of life was examined. Swelling of fertilised eggs in water supplemented with Se at a concentration from 0.5 to 8 mg Se L-1 was associated with a slightly positive impact on the hatching rate. At higher Se concentration, a harmful effect on the survival of the embryo was observed. The survival of fry was similar in all groups, while the fry length and weight correlated positively with Se concentration in its body. Immersion of fertilised eggs in water enriched with Se during egg swelling can constitute a method to supplement the element to non-feeding stages of fish. In selenium-poor areas, this innovative method can be implemented in aquaculture to improve breeding outcomes. Se concentration should be adjusted to the chemical compound, fish species, and Se's content in the yolk.
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Kryczyk-Kozioł J, Zagrodzki P, Prochownik E, Błażewska-Gruszczyk A, Słowiaczek M, Sun Q, Schomburg L, Ochab E, Bartyzel M. Positive effects of selenium supplementation in women with newly diagnosed Hashimoto's thyroiditis in an area with low selenium status. Int J Clin Pract 2021; 75:e14484. [PMID: 34107151 DOI: 10.1111/ijcp.14484] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/06/2021] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE Autoimmune thyroid diseases, including Hashimoto's thyroiditis, are the most common ones among autoimmune diseases. The reported effects of selenium supplementation on the course of Hashimoto's thyroiditis are not consistent. It is therefore important to continue this line of research. DESIGN The participants received selenium in the form of sodium selenite(IV) at a dose of 100 µg/day for 6 months. PATIENTS Newly diagnosed and previously untreated Hashimoto's thyroiditis with euthyroidism or subclinical hypothyroidism. A total of 36 patients (aged 20 to 52 years) qualified for this study, of whom 29 women were successfully enrolled and completed the intervention. MEASUREMENTS Both before and after supplementation the following parameters in serum were tested: anti-thyroid peroxidase antibodies, thyroid function indicators, selenium as well as antioxidant status parameters and other biochemical parameters (lipid profile, glucose). Iodine supply and subjective assessment of physical and psychological health were also monitored. RESULTS Selenium supplementation decreased significantly level of anti-thyroid peroxidase antibodies what might have had a stabilizing effect on thyroid function, as values of thyroid parameters were within normal range before and at the end of the study. Mean level of selenium among patients was not different to healthy people in Poland. Median of ioduria was within normal range. CONCLUSIONS The study shows a potential way of protective effect of selenium in limiting development of overt hypothyroidism. The increase in the concentrations of Se and SELENOP in the serum of patients verifies successful supplementation and good compliance, but did not affect the antioxidant status parameters measured.
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Affiliation(s)
- Jadwiga Kryczyk-Kozioł
- Department of Food Chemistry and Nutrition, Jagiellonian University Medical College, Kraków, Poland
| | - Paweł Zagrodzki
- Department of Food Chemistry and Nutrition, Jagiellonian University Medical College, Kraków, Poland
| | - Ewelina Prochownik
- Department of Food Chemistry and Nutrition, Jagiellonian University Medical College, Kraków, Poland
| | | | | | - Qian Sun
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ewa Ochab
- H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
| | - Mirosław Bartyzel
- H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
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Socha K, Karwowska A, Kurianiuk A, Markiewicz-Żukowska R, Guzowski A, Gacko M, Hirnle T, Borawska MH. Estimation of Selected Minerals in Aortic Aneurysms-Impaired Ratio of Zinc to Lead May Predispose? Biol Trace Elem Res 2021; 199:2811-2818. [PMID: 33006035 PMCID: PMC8222018 DOI: 10.1007/s12011-020-02410-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 09/23/2020] [Indexed: 12/04/2022]
Abstract
The objective of this study was to estimate the content of copper, zinc, selenium, cadmium, and lead in the tissue of patients with aortic aneurysms. Molar ratio of Cu/Zn and antioxidant micronutrients to toxic elements was also calculated. A total of 108 patients: 47 with abdominal aortic aneurysm (AAA), 61 patients with thoracic aortic aneurysm (TAA), and a control group of 20 abdominal aortic (AA) and 20 thoracic aortic (TA) wall samples from the deceased were studied. The concentrations of mineral components in the tissue samples were determined by the AAS method. The average concentration of Cu in the aortic wall of patients with TAA was significantly lower than in the aortic wall samples of healthy people. The mean concentration of Zn in the aortic wall of patients with AAA and TAA was significantly lower than in the control group samples. Cu/Zn ratio was significantly higher in AAA patients than in control group which indicates a greater role of oxidative stress and inflammatory process in this type of aneurysm. The concentration of Se was significantly decreased in TAA patients compared with the control group; in turn, the concentration of Pb was increased in this group of patients. We observed significantly lower Cu/Pb ratio in TAA patients than in control group, whereas Zn/Pb ratio was significantly lower comparing with control samples in both types of aneurysms. In the examined aneurysms, we have shown the differences in concentrations of mineral components compared with the control tissues. The Zn concentration was decreased in both AAA and TAA samples. Impaired ratio of Zn to Pb may predispose to aortic aneurysms.
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Affiliation(s)
- Katarzyna Socha
- Department of Bromatology, Medical University of Bialystok, Bialystok, Poland.
| | - Alicja Karwowska
- Department of Hygiene, Epidemiology and Metabolic Disorders, Medical University of Bialystok, Bialystok, Poland
| | - Adam Kurianiuk
- Department of Hygiene, Epidemiology and Metabolic Disorders, Medical University of Bialystok, Bialystok, Poland
| | | | - Andrzej Guzowski
- Department of Vascular Surgery and Transplantation, Medical University of Bialystok, Bialystok, Poland
| | - Marek Gacko
- Department of Vascular Surgery and Transplantation, Medical University of Bialystok, Bialystok, Poland
| | - Tomasz Hirnle
- Department of Cardiosurgery, Medical University of Bialystok, Bialystok, Poland
| | - Maria H Borawska
- Department of Bromatology, Medical University of Bialystok, Bialystok, Poland
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Socha K, Klimiuk K, Naliwajko SK, Soroczyńska J, Puścion-Jakubik A, Markiewicz-Żukowska R, Kochanowicz J. Dietary Habits, Selenium, Copper, Zinc and Total Antioxidant Status in Serum in Relation to Cognitive Functions of Patients with Alzheimer's Disease. Nutrients 2021; 13:nu13020287. [PMID: 33498452 PMCID: PMC7909435 DOI: 10.3390/nu13020287] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/11/2021] [Accepted: 01/17/2021] [Indexed: 12/20/2022] Open
Abstract
Oxidative stress plays a crucial role in the neurodegenerative process and can impair cognitive functions. In the prevention of Alzheimer's disease (AD), an adequate consumption of dietary antioxidants may be a major factor. The objective of the study was to estimate selenium (Se), copper (Cu), zinc (Zn), and total antioxidant status (TAS) in the serum of patients with AD in relation to their cognitive functions and dietary habits. A total of 110 patients (aged 54-93 years) with early or moderate AD, as well as 60 healthy people (aged 52-83 years) were studied. The severity of the disease was assessed using the mini-mental state examination (MMSE) scale. Food-frequency questionnaires were implemented to collect the dietary data. The concentrations of Se, Cu and Zn in the sera were determined by the atomic absorption spectrometry method. TAS was estimated spectrophotometrically using ready-made kits (Randox). Significantly lower concentrations of Se, Zn and TAS, and higher Cu:Zn ratio in the serum of patients with AD, compared to healthy people, were observed. A low correlation between the MMSE score and TAS in the serum of AD patients and significantly higher MMSE values in patients with TAS above the reference range were also noted. In patients with serum Cu concentration above the norm, significantly lower MMSE values were found. Selected dietary habits such as the frequency of consumption of various food products had a significant impact on the concentration of the assessed parameters in the serum of people with AD.
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Affiliation(s)
- Katarzyna Socha
- Department of Bromatology, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Białystok, Mickiewicza 2D Street, 15-222 Białystok, Poland; (S.K.N.); (J.S.); (A.P.-J.); (R.M.-Ż.)
- Correspondence: ; Tel.: +48-8574-854-68
| | - Katarzyna Klimiuk
- Podlasie Center of Psychogeriatrics, Swobodna 38 Street, 15-756 Białystok, Poland;
| | - Sylwia K. Naliwajko
- Department of Bromatology, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Białystok, Mickiewicza 2D Street, 15-222 Białystok, Poland; (S.K.N.); (J.S.); (A.P.-J.); (R.M.-Ż.)
| | - Jolanta Soroczyńska
- Department of Bromatology, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Białystok, Mickiewicza 2D Street, 15-222 Białystok, Poland; (S.K.N.); (J.S.); (A.P.-J.); (R.M.-Ż.)
| | - Anna Puścion-Jakubik
- Department of Bromatology, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Białystok, Mickiewicza 2D Street, 15-222 Białystok, Poland; (S.K.N.); (J.S.); (A.P.-J.); (R.M.-Ż.)
| | - Renata Markiewicz-Żukowska
- Department of Bromatology, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Białystok, Mickiewicza 2D Street, 15-222 Białystok, Poland; (S.K.N.); (J.S.); (A.P.-J.); (R.M.-Ż.)
| | - Jan Kochanowicz
- Department of Neurology, Medical University of Białystok, M. Skłodowskiej-Curie 24a Street, 15-276 Białystok, Poland;
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Podkowa A, Kryczyk-Poprawa A, Opoka W, Muszyńska B. Culinary–medicinal mushrooms: a review of organic compounds and bioelements with antioxidant activity. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-020-03646-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
AbstractThere are about 3000 species of mushrooms, which have a high amount of substances that are beneficial to human health, such as antioxidants. It is well known that oxidative stress plays an important role in the etiopathogenesis of many diseases, including cancer, cardiovascular disorders, and diseases of the central nervous system. One way to prevent homeostasis disorders that occur as a result of excessive production of pro-oxidative substances is to include the ingredients having antioxidant properties in the diet. Several compounds, such as those with phenolic and indole derivatives as well as carotenoids and some vitamins, exhibit antioxidant activity. These substances are present in many foods, including mushrooms. In addition, they have certain unique compounds that are not found in other sources (e.g., norbadione A). The present work discusses selected ingredients exhibiting antioxidant activity, which are found in various species of mushrooms as wells as describes the content of these compounds in the extracts obtained from mushrooms using artificial digestive juice.
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11
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Charkiewicz AE, Omeljaniuk WJ, Orywal K, Czygier M, Szmitkowski M, Mroczko B, Maślach D, Szpak A. Concentration of Selected Elements and Antioxidative Potential in a Group of Males Working in the Metal Industry: Elements And Antioxidative Potential In Men. Am J Mens Health 2020; 13:1557988319851954. [PMID: 31109234 PMCID: PMC6537257 DOI: 10.1177/1557988319851954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The purpose of this study was to show that some elements have a proven
antioxidative effect and are essential for the proper development and
functioning of the human body. The study also assessed the concentration of
selected elements and total antioxidant status (TAS) in a group of male
inhabitants of Białystok, Poland, who are professionally active in the metal
industry. The study group comprised 163 men aged 55–64 years. The concentration
of the analyzed elements was determined using flame (Zn and Cu) and
electrothermal (Se, Cd, and Pb) atomic absorption spectrometry.
Spectrophotometric test kits were used to assay the TAS and glutathione
reductase (GR) activity in serum. The results suggested the mean concentration
of Se in serum was 54.04 ± 12.10 μg/L, which was below the reference range. A
significant negative correlation was observed between the concentration of Se in
the serum and Pb and Cd concentrations in the whole blood of the studied men.
The concentrations of the other elements, antioxidant potential, and GR activity
were within the reference range. A statistically significant positive
correlation was observed between Pb and Cd, indicating combined exposure and a
considerable negative correlation between lead and selenium as well as between
lead and TAS. Selenium and TAS are likely to modify the adverse effects of Pb in
the bodies of the studied men. The results indicate that it is necessary to
constantly monitor men who are occupationally exposed to heavy metals, maintain
a healthy lifestyle, and introduce effective preventive measures at a local
level.
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Affiliation(s)
| | - Wioleta Justyna Omeljaniuk
- 2 Department of Pharmaceutical Biochemistry, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Bialystok, Poland
| | - Karolina Orywal
- 3 Department of Biochemical Diagnostics, Medical University of Białystok, Poland
| | - Małgorzata Czygier
- 3 Department of Biochemical Diagnostics, Medical University of Białystok, Poland
| | - Maciej Szmitkowski
- 3 Department of Biochemical Diagnostics, Medical University of Białystok, Poland
| | - Barbara Mroczko
- 4 Department of Biochemical Diagnostics, University Hospital in Białystok, Poland.,5 Department of Neurodegeneration Diagnostics, Medical University of Białystok, Poland
| | - Dominik Maślach
- 1 Department of Public Health, Faculty of Health Sciences, Medical University of Bialystok, Poland
| | - Andrzej Szpak
- 6 Department of Epidemiology and Biostatistics, Institute of Rural Health, Lublin, Poland.,7 University of Economics and Innovation, Lublin, Poland
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Zwolak I. The Role of Selenium in Arsenic and Cadmium Toxicity: an Updated Review of Scientific Literature. Biol Trace Elem Res 2020; 193:44-63. [PMID: 30877523 PMCID: PMC6914719 DOI: 10.1007/s12011-019-01691-w] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/28/2019] [Indexed: 02/01/2023]
Abstract
Arsenic (As) and cadmium (Cd) are elements arousing major public health concerns associated with environmental pollution, high toxicity potential, and carcinogenic nature. However, selenium (Se) at low doses and incorporated into enzymes and proteins has antioxidant properties and protects animals and humans from the risk of various diseases. It also has an exceptionally narrow range between necessary and toxic concentrations, which is a well-known hindrance in its use as a dietary supplement. The present article aims to update and expand the role of Se in As and Cd toxicity discussed in our earlier paper. In general, recent reports show that Se, regardless of its form (as selenite, selenomethionine, nanoSe, or Se from lentils), can reduce As- or Cd-mediated toxicity in the liver, kidney, spleen, brain, or heart in animal models and in cell culture studies. As was suggested in our earlier review, Se antagonizes the toxicity of As and Cd mainly through sequestration of these elements into biologically inert complexes and/or through the action of Se-dependent antioxidant enzymes. An increase in the As methylation efficiency is proposed as a possible mechanism by which Se can reduce As toxicity. However, new studies indicate that Se may also diminish As or Cd toxicity by activation of the Nrf2 pathway. In addition, this paper discusses possible signs of Se toxic effects, which may be a challenge for its future use in the therapy of As and Cd poisoning and provide future directions to address this issue.
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Affiliation(s)
- Iwona Zwolak
- Laboratory of Oxidative Stress, Centre for Interdisciplinary Research, The John Paul II Catholic University of Lublin, Konstantynów 1 J, 20-708, Lublin, Poland.
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Pietrzak S, Wójcik J, Scott RJ, Kashyap A, Grodzki T, Baszuk P, Bielewicz M, Marciniak W, Wójcik N, Dębniak T, Masojć B, Pieróg J, Cybulski C, Gronwald J, Wojtyś M, Kubisa B, Sukiennicki G, Deptuła J, Waloszczyk P, Jakubowska A, Lubiński J, Lener MR. Influence of the selenium level on overall survival in lung cancer. J Trace Elem Med Biol 2019; 56:46-51. [PMID: 31442953 DOI: 10.1016/j.jtemb.2019.07.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/25/2019] [Accepted: 07/25/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Although the results of studies in populations with low selenium status indicate an inverse correlation between body selenium levels and the risk of the lung cancer, the effect of this microelement on survival has not been studied. MATERIALS AND METHODS We performed a prospective study of 302 patients diagnosed with lung cancer in Szczecin, Poland. Selenium concentration in serum was measured at the time of diagnosis and before treatment. All patients were followed for a maximum of 80 months or until death. Vital status was obtained from the Polish National Death Registry. RESULTS Using Cox proportional hazard analysis, performed for all individuals with lung cancer, the hazard ratio (HR) for death from all causes was 1.25 (95% CI: 0.86-1.83, P = 0.99) for patients in the lowest tertile compared to those in the highest tertile of serum selenium levels. Among the patients with stage I disease this relationship was significant (HR-2.73; P = 0.01) for selenium level in tertile 1 (<57 μg/L) compared to tertile 3 (>69 μg/L, reference). The 80 months crude survival after diagnosis was 79.5% (95% CI: 68.5-92.4%) for individuals in the highest tertile and 58.1% (95% CI: 45.1-74.9%) for individuals in the lowest tertile with stage I lung cancer. CONCLUSION These results suggest that in patients undergoing treatment for stage I lung cancer, serum selenium levels at the time of diagnosis (>69 μg/L) may be associated with improved overall survival.
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Affiliation(s)
- Sandra Pietrzak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Janusz Wójcik
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Rodney J Scott
- Medical Genetics, Hunter Medical Research Institute; Priority Research Centre for Cancer Research, Innovation and Translation, School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle; Pathology North, John Hunter Hospital, Cnr King and Auckland Streets, Newcastle, NSW, 2300, Australia
| | - Aniruddh Kashyap
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Tomasz Grodzki
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Piotr Baszuk
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Michał Bielewicz
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Wojciech Marciniak
- Read-Gene, Grzepnica, ul. Alabastrowa 8, 72-003, Dobra (Szczecińska), Poland
| | - Norbert Wójcik
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Tadeusz Dębniak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Bartłomiej Masojć
- Radiation Oncology Department, West Pomeranian Oncology Center, ul. Strzałowska 22, 71-730, Szczecin, Poland
| | - Jarosław Pieróg
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Cezary Cybulski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jacek Gronwald
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Małgorzata Wojtyś
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Bartosz Kubisa
- Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, ul. A. Sokołowskiego 11, 70-891, Szczecin, Poland
| | - Grzegorz Sukiennicki
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jakub Deptuła
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Piotr Waloszczyk
- Independent Laboratory of Pathology, Zdunomed, ul. Energetyków 2, 70-656, Szczecin, Poland
| | - Anna Jakubowska
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland
| | - Jan Lubiński
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland; Read-Gene, Grzepnica, ul. Alabastrowa 8, 72-003, Dobra (Szczecińska), Poland
| | - Marcin R Lener
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Unii Lubelskiej 1, 71-252, Szczecin, Poland.
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Dos Santos M, Veneziani Y, Muccillo-Baisch AL, Da Silva Júnior FMR. Global survey of urinary selenium in children: A systematic review. J Trace Elem Med Biol 2019; 56:1-5. [PMID: 31442946 DOI: 10.1016/j.jtemb.2019.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Selenium (Se) is an essential element in the human body that plays an important role in numerous fundamental physiological functions. However, the distribution of Se in the environment varies widely resulting in this element being available in a large concentration range in the ecosystem, and thus, in the human body. Urinary Se is a biomarker considered to be involved in adaptive mechanisms that help prevent health problems. OBJECTIVES The purpose of the present study was to conduct a systematic review to identify studies reporting the status of urinary Se in healthy children and create a global map. METHODS A literature search was conducted using MEDLINE (United States National Library of Medicine), Web of Science, Toxicology Bibliographic Information (TOXLINE), Latin-American and Caribbean Literature on Health Sciences (LILACS), and the grey literature. This study was registered in PROSPERO (international prospective register of systematic reviews) and was conducted in accordance with the PRISMA guidelines. RESULTS We identified 322 relevant articles, out of which 15 were included in this systematic review. The study identified a total of 4038 healthy children worldwide with urinary Se concentrations from 7.7 to 145.0 μg/L. CONCLUSION This is a pioneering study that provides evidence for the presence of Se in the urine of healthy children; we have shown that the available data is restricted to a small number of individuals and specific groups. Furthermore, there is a lack of information on urinary Se, especially in Latin America, Africa, and Asia.
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Affiliation(s)
- Marina Dos Santos
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil.
| | - Yuri Veneziani
- Programa de Pós-graduação em Geografia Física, Departamento de Geografia, Universidade de São Paulo, São Paulo, Brazil.
| | - Ana Luíza Muccillo-Baisch
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil; Laboratório de Ensaios Farmacológicos e Toxicológicos, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil.
| | - Flávio Manoel Rodrigues Da Silva Júnior
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil; Laboratório de Ensaios Farmacológicos e Toxicológicos, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil.
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Influence of a 6-month physical training program on serum and urinary concentrations of trace metals in middle distance elite runners. J Int Soc Sports Nutr 2019; 16:53. [PMID: 31727101 PMCID: PMC6857336 DOI: 10.1186/s12970-019-0322-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/05/2019] [Indexed: 11/11/2022] Open
Abstract
Background The aim of this survey was to determine the effects of an aerobic physical training program of six months duration on the serum and urinary concentrations of essential trace elements among middle distance runners and untrained, non-sportsmen participants. Methods 24 well-trained, middle-distance (1500 and 5000 m), aerobic male runners (AG) were recruited at the beginning of their training season and 26 untrained males formed the control group (CG). All participants were from the same region of Spain, and all of them had been living in this area for at least two years. Serum and urine of samples of Cobalt (Co), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Selenium (Se), Vanadium (V) and Zinc (Zn) were obtained at the beginning of the training season, and six months later, from all participants. All samples were analyzed with inductively coupled plasma mass spectrometry (ICP-MS). Results Two-way ANOVA showed significant differences relative to group effect in serum concentrations of Co, Cu, Mn, Mo, Se and Zn. Attending to time effect, there were differences in Mn (p = 0.003) and Zn (p = 0.001). The group x time interaction revealed differences only in the case of Mn (p = 0.04). In urine, significant differences between group were obtained in Co, Cu, Mn, Se and V. Time effect showed changes in Co, Cy, Mo and Se. Finally, the group and time interaction revealed significant differences in urinary Cu (p = 0.001), Mn (p = 0.01) and Se (p = 0.001). Conclusions A six-month aerobic training program for well-trained athletes induced modifications in the body values of several minerals, a fact which may reflect adaptive responses to physical exercise. The obtained data could be interesting for physicians or coaches in order to consider specific modifications in sportsmen’s diets as well as to determine specific nutritional supplementation strategies.
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Producing specialist poultry products to meet human nutrition requirements: Selenium enriched eggs. WORLD POULTRY SCI J 2019. [DOI: 10.1017/s0043933907001742] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Role of Zinc and Selenium in Oxidative Stress and Immunosenescence: Implications for Healthy Aging and Longevity. HANDBOOK OF IMMUNOSENESCENCE 2019. [PMCID: PMC7121636 DOI: 10.1007/978-3-319-99375-1_66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aging is a complex process that includes gradual and spontaneous biochemical and physiological changes which contributes to a decline in performance and increased susceptibility to diseases. Zn and Se are essential trace elements that play a pivotal role in immune functions and antioxidant defense and, consequently, are claimed to play also a role in successful aging trajectories. Consistently with their nature of essential trace elements, a plethora of data obtained “in vitro” and “in vivo” (in humans and animal models) support the relevance of Zn and Se for both the innate and adoptive immune response. Moreover, Zn and Se are strictly involved in the synthesis and regulation of activity of proteins and enzymes, e.g., metallothioneins (MT) and glutathione peroxidase (GPX), that are necessary for our endogenous antioxidant response. This is clearly important to protect our cells from oxidative damage and to slow the decline of our immune system with aging. Age-related changes affecting tissue levels of Zn and Se may indicate that the risk of Zn and Se deficiency increases with aging. However, it is still unclear which of these changes can be the consequence of a “real deficiency” and which can be part of our physiological compensatory response to the accumulating damage occurring in aging. Furthermore, the upregulation of antioxidant proteins (Zn and Se dependent) may be a manifestation of self-induced oxidative stress. By the way, Zn and Se dependent proteins are modulated not only by nutritional status, but also by well-known hallmarks of aging that play antagonistic functions, such as the deregulated nutrient sensing pathways and cellular senescence. Thus, it is not an easy task to conduct Zn or Se supplementation in elderly and it is emerging consistent that these kind of supplementation requires an individualized approach. Anyway, there is consistent support that supplementation with Zn using doses around 10 mg/day is generally safe in elderly and may even improve part of immune performances in those subjects with a baseline deficiency. Regarding Se supplementation, it may induce both beneficial and detrimental effects on cellular immunity depending on the form of Se, supplemental dose, and delivery matrix. The nutritional association of supplements based on “Zn plus Se” is hypothesized to provide additional benefits, but this will likely need a more complex individualized approach. The improvement of our knowledge around screening and detection of Zn and Se deficiency in aging could lead to substantial benefits in terms of efficacy of nutritional supplements aimed at ameliorate performance and health in aging.
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Mattioli S, Dal Bosco A, Duarte JMM, D'Amato R, Castellini C, Beone GM, Fontanella MC, Beghelli D, Regni L, Businelli D, Trabalza-Marinucci M, Proietti P. Use of Selenium-enriched olive leaves in the feed of growing rabbits: Effect on oxidative status, mineral profile and Selenium speciation of Longissimus dorsi meat. J Trace Elem Med Biol 2019; 51:98-105. [PMID: 30466946 DOI: 10.1016/j.jtemb.2018.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 08/09/2018] [Accepted: 10/03/2018] [Indexed: 11/20/2022]
Abstract
In the present study the use of Selenium-fortified olive leaves as potential dietary source of Se in rabbit nutrition was evaluated. Sixty New Zealand White rabbits (35 days of age) were randomly assigned to the following dietary treatments: standard diet (C), and C supplemented with either 10% olive leaves (OL) or 10% Selenium-fortified olive leaves (SeOL; 100 mg/L of foliar spray sodium selenate solution). At 70 days of age, 10 rabbits per group were slaughtered and the oxidative status, mineral profile and Selenium speciation of Longissimus dorsi meat was analyzed. Meat of the SeOL group exhibited better oxidative status (lower TBARS, higher GPx and α-tocopherol values) and a 5-fold higher Se content compared to that of the other treatments. The main Se form was SeMet (7-fold higher in the SeOL group), followed by SeCys2. The present trial demonstrates the possibility of using agro-industrial by-products as ingredients in rabbit feeds, thereby enriching meat bioactive compound content.
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Affiliation(s)
- Simona Mattioli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy.
| | - Alessandro Dal Bosco
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
| | | | - Roberto D'Amato
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
| | - Cesare Castellini
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
| | - Gian Maria Beone
- Department for Sustainable Process, Agricultural Faculty, Università Cattolica del Sacro Cuore of Piacenza, Piacenza, Italy
| | - Maria Chiara Fontanella
- Department for Sustainable Process, Agricultural Faculty, Università Cattolica del Sacro Cuore of Piacenza, Piacenza, Italy
| | - Daniela Beghelli
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Gentile III da Varano, 62032 Camerino MC, Italy
| | - Luca Regni
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
| | - Daniela Businelli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
| | | | - Primo Proietti
- Department of Agricultural, Environmental and Food Science, University of Perugia, Perugia, Italy
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Abstract
Selenium (Se) is an essential trace element of significant importance in human health. Diet is the major source of Se, and intake of this element depends on its concentration in food sources as well as the amount of those sources consumed. Unfortunately, daily dietary intake of Se in most European countries is generally low, ∼30-40μg/day, compared with the recommended dietary allowance, ∼55 and 70μg/day for adult females and males, respectively. The importance of Se as an essential trace element is linked to its role as selenocysteine in a number of selenoproteins including antioxidant enzymes glutathione peroxidases (GSH-Pxs), thioredoxin reductases (TrxRs), and selenoprotein P (SePP). These enzymes protect tissues against the damaging effect of reactive oxygen species (ROS) and other endogenous products of cellular metabolism implicated in DNA damage and potentially leading to mutagenesis, cell death, and carcinogenesis. Reduced body Se and antioxidant enzyme activity during pregnancy results in oxidative stress within tissues contributing to premature birth, miscarriage, preeclampsia, and intrauterine growth retardation. Because placenta development is highly dependent on oxygen status, uncontrolled ROS formation is likely detrimental. Despite these findings, the role of Se and Se-dependent enzymes in pregnancy remains controversial. The objective of this review is to explore Se status in pregnancy with respect to adverse outcomes. Effects related to decreased antioxidant activity and increased oxidative stress will be highlighted.
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Affiliation(s)
- Bronislaw A Zachara
- Department of Cosmetology and Physiotherapy, Higher School of Health Sciences, Bydgoszcz, Poland.
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Zoidis E, Seremelis I, Kontopoulos N, Danezis GP. Selenium-Dependent Antioxidant Enzymes: Actions and Properties of Selenoproteins. Antioxidants (Basel) 2018; 7:E66. [PMID: 29758013 PMCID: PMC5981252 DOI: 10.3390/antiox7050066] [Citation(s) in RCA: 203] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 05/07/2018] [Accepted: 05/09/2018] [Indexed: 12/23/2022] Open
Abstract
Unlike other essential trace elements that interact with proteins in the form of cofactors, selenium (Se) becomes co-translationally incorporated into the polypeptide chain as part of 21st naturally occurring amino acid, selenocysteine (Sec), encoded by the UGA codon. Any protein that includes Sec in its polypeptide chain is defined as selenoprotein. Members of the selenoproteins family exert various functions and their synthesis depends on specific cofactors and on dietary Se. The Se intake in productive animals such as chickens affect nutrient utilization, production performances, antioxidative status and responses of the immune system. Although several functions of selenoproteins are unknown, many disorders are related to alterations in selenoprotein expression or activity. Selenium insufficiency and polymorphisms or mutations in selenoproteins' genes and synthesis cofactors are involved in the pathophysiology of many diseases, including cardiovascular disorders, immune dysfunctions, cancer, muscle and bone disorders, endocrine functions and neurological disorders. Finally, heavy metal poisoning decreases mRNA levels of selenoproteins and increases mRNA levels of inflammatory factors, underlying the antagonistic effect of Se. This review is an update on Se dependent antioxidant enzymes, presenting the current state of the art and is focusing on results obtained mainly in chicken.
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Affiliation(s)
- Evangelos Zoidis
- Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
| | - Isidoros Seremelis
- Chemistry Laboratory, Department of Food Science and Human Nutrition, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
| | - Nikolaos Kontopoulos
- Chemistry Laboratory, Department of Food Science and Human Nutrition, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
| | - Georgios P Danezis
- Chemistry Laboratory, Department of Food Science and Human Nutrition, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
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Ullah H, Liu G, Yousaf B, Ali MU, Abbas Q, Munir MAM, Mian MM. Developmental selenium exposure and health risk in daily foodstuffs: A systematic review and meta-analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 149:291-306. [PMID: 29268101 DOI: 10.1016/j.ecoenv.2017.11.056] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/19/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Selenium (Se) is a trace mineral and an essential nutrient of vital importance to human health in trace amounts. It acts as an antioxidant in both humans and animals, immunomodulator and also involved in the control of specific endocrine pathways. The aim of this work is to provide a brief knowledge on selenium content in daily used various foodstuffs, nutritional requirement and its various health consequences. In general, fruits and vegetables contain low content of selenium, with some exceptions. Selenium level in meat, eggs, poultry and seafood is usually high. For most countries, cereals, legumes, and derivatives are the major donors to the dietary selenium intake. Low level of selenium has been related with higher mortality risk, dysfunction of an immune system, and mental failure. Selenium supplementation or higher selenium content has antiviral outcomes and is necessary for effective reproduction of male and female, also decreases the threat of chronic disease (autoimmune thyroid). Generally, some advantages of higher content of selenium have been shown in various potential studies regarding lung, colorectal, prostate and bladder cancers risk, nevertheless results depicted from different trials have been diverse, which perhaps indicates the evidence that supplementation will merely grant advantage if the intakes of a nutrient is deficient. In conclusion, the over-all people should be advised against the usage of Se supplements for prevention of cardiovascular, hepatopathies, or cancer diseases, as advantages of Se supplements are still ambiguous, and their haphazard usage could result in an increased Se toxicity risk. The associations among Se intake/status and health, or disease risk, are complicated and need exposition to notify medical practice, to improve dietary recommendations, and to develop adequate communal health guidelines.
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Affiliation(s)
- Habib Ullah
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China.
| | - Guijian Liu
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China.
| | - Balal Yousaf
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Muhammad Ubaid Ali
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Qumber Abbas
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Mehr Ahmed Mujtaba Munir
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
| | - Md Manik Mian
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
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Kitowski I, Jakubas D, Indykiewicz P, Wiącek D. Factors Affecting Element Concentrations in Eggshells of Three Sympatrically Nesting Waterbirds in Northern Poland. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 74:318-329. [PMID: 29170796 PMCID: PMC5807457 DOI: 10.1007/s00244-017-0481-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
Avian eggshells are convenient samples in biomonitoring studies, because they are easily accessible, especially from colonially or semicolonially breeding birds. In the present study, concentrations of 17 elements, including heavy metals and essential elements in post-hatch eggshells, were compared among three species of waterbirds of differing strategies for gaining reserves for egg production and diet: mallard, Anas platyrhynchos (ML, a capital breeder, mainly herbivorous), common tern, Sterna hirundo (CT, an income breeder, piscivorous) and black-headed gull, Chroicocephalus ridibundus (BHG, mixed strategy, omnivorous) and breeding sympatrically in three sites in North Poland. Analyses revealed that Fe, Zn, and Cu levels differed the most in the studied species, which may be explained by various contributions of fish, aquatic plants, and soil invertebrates in their diets. Generally, the studied species' eggshells accumulated amounts of elements comparable to those reported for other waterbirds without putting the growth and development of the embryo at risk. The only exception was very high levels of Cr in ML and CT, which may be explained by their foraging on aquatic organisms in waterbodies polluted by this element. Intersite differences in eggshell concentrations of Ni, Sr, Hg and Cr in CT (an income breeder) may be explained by the influence of local pollution sources (small factories, polluted river).
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Affiliation(s)
- Ignacy Kitowski
- State School of Higher Education in Chełm, Pocztowa 54, 22-100, Chełm, Poland
| | - Dariusz Jakubas
- Department of Vertebrate Ecology and Zoology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308, Gdańsk, Poland
| | - Piotr Indykiewicz
- Department of Biology and Animal Environment, University of Sciences and Technology, Kordeckiego 20, 85-225, Bydgoszcz, Poland.
| | - Dariusz Wiącek
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290, Lublin, Poland
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Lubiński J, Marciniak W, Muszynska M, Jaworowska E, Sulikowski M, Jakubowska A, Kaczmarek K, Sukiennicki G, Falco M, Baszuk P, Mojsiewicz M, Kotsopoulos J, Sun P, Narod SA, Lubiński JA. Serum selenium levels and the risk of progression of laryngeal cancer. PLoS One 2018; 13:e0184873. [PMID: 29304040 PMCID: PMC5755727 DOI: 10.1371/journal.pone.0184873] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 09/03/2017] [Indexed: 12/31/2022] Open
Abstract
Background Observational studies have reported an inverse relationship between selenium status (blood or toenail) and the risk of laryngeal cancer; however, the impact of low serum selenium level on survival has not been evaluated. Methods We conducted a prospective study of 296 patients diagnosed with laryngeal cancer in Szczecin, Poland. Serum selenium was measured at diagnosis and prior to treatment. Patients were followed from the date of diagnosis to death at five years. Vital status was obtained by linkage to the Polish National Death Registry. Results The five-year survival after diagnosis was 82.0% (95% CI: 68% to 91%) for individuals in the highest quartile of serum selenium (> 66.8 μg/L) and was 28.6% (95% CI 19% to 42%) for individuals in the lowest quartile (<50.0 μg/L). In an age- and sex-adjusted analysis, the hazard ratio (HR) for death from all causes was 7.01 (95% CI 3.81 to 12.9) for patients in the lowest quartile of serum selenium, compared to those in the highest quartile. The corresponding multivariate HR was 3.07 (95% CI 1.59 to 5.94). Conclusions This study suggests that a selenium level in excess of 70 μg/L is associated with improved outcome among patients undergoing treatment for laryngeal cancer. Further studies are needed to evaluate if selenium supplementation to achieve this level might improve overall prognosis.
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Affiliation(s)
- Jan Lubiński
- Clinic of Otolaryngology, Pomeranian Medical University, Szczecin, Poland
- ReadGene, Grzepnica, Poland
| | - Wojciech Marciniak
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Magdalena Muszynska
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Jaworowska
- Clinic of Otolaryngology, Pomeranian Medical University, Szczecin, Poland
| | | | - Anna Jakubowska
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Katarzyna Kaczmarek
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Grzegorz Sukiennicki
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Michal Falco
- Regional Oncology Centre Szczecin, Szczecin, Poland
| | - Piotr Baszuk
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Magdalena Mojsiewicz
- Institute of Econometric and Statistics, University of Szczecin, Szczecin, Poland
| | - Joanne Kotsopoulos
- Women’s College Research Institute, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Ping Sun
- Women’s College Research Institute, Toronto, Canada
| | - Steven A. Narod
- Women’s College Research Institute, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- * E-mail: (SN); (JAL)
| | - Jan A. Lubiński
- ReadGene, Grzepnica, Poland
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
- * E-mail: (SN); (JAL)
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24
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Ambroziak U, Hybsier S, Shahnazaryan U, Krasnodębska-Kiljańska M, Rijntjes E, Bartoszewicz Z, Bednarczuk T, Schomburg L. Severe selenium deficits in pregnant women irrespective of autoimmune thyroid disease in an area with marginal selenium intake. J Trace Elem Med Biol 2017; 44:186-191. [PMID: 28965575 DOI: 10.1016/j.jtemb.2017.08.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 07/28/2017] [Accepted: 08/02/2017] [Indexed: 01/22/2023]
Abstract
OBJECTIVES Selenium (Se) deficiency is related to an increased risk of preterm labor, miscarriage, preeclampsia, gestational diabetes, and other obstetric complications. As the Se status declines during pregnancy, we hypothesized that the decline may be exacerbated in women with autoimmune thyroid disease (AITD). MATERIAL AND METHODS Pregnant women (n=74; 30 [23-38] years) were consecutively recruited from the district of Warsaw, Poland, and divided into healthy subjects (HS, n=45), and women with a diagnosis of AITD (AITD, n=29). Thyroglobulin antibodies (TG-aAb), thyroid peroxidase antibodies (TPO-aAb), TSH, free T3, free T4, total T3, and total T4, as well as urine iodine excretion were determined. Se status was assessed by serum Se and selenoprotein P (SELENOP) concentrations. Thyroid volume was evaluated by ultrasonography. RESULTS Serum Se and SELENOP concentrations were relatively low in both control and AITD women. A Se deficit according to WHO definition (<45μg/l) was observed in 0%, 3.4%, 28.6% and 4.5%, 18.2%, 35.5% of women in the AITD and HS group, respectively, during the 1st, 2nd, and 3rd trimester. From first to third trimester, TPO-aAb and TG-aAb declined in AITD by 71% and 60%, respectively. The decline in TPO- and TG-aAb was unrelated to the Se status. CONCLUSIONS In this area of habitual low Se intake, a high proportion of women developed a severe Se deficit during pregnancy, irrespective of AITD status. This decline must be considered as a preventable risk factor for pregnancy complications of relevance to both the unborn child and the pregnant mother.
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Affiliation(s)
- Urszula Ambroziak
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland.
| | - Sandra Hybsier
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Urszula Shahnazaryan
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland
| | | | - Eddy Rijntjes
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Zbigniew Bartoszewicz
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland
| | - Tomasz Bednarczuk
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
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25
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Polanska K, Hanke W, Krol A, Gromadzinska J, Kuras R, Janasik B, Wasowicz W, Mirabella F, Chiarotti F, Calamandrei G. Micronutrients during pregnancy and child psychomotor development: Opposite effects of Zinc and Selenium. ENVIRONMENTAL RESEARCH 2017; 158:583-589. [PMID: 28715787 DOI: 10.1016/j.envres.2017.06.037] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 06/04/2017] [Accepted: 06/29/2017] [Indexed: 05/17/2023]
Abstract
Studies on the impact of micronutrient levels during different pregnancy periods on child psychomotor functions are limited. The aim of this study was to evaluate the association between maternal plasma concentrations of selected micronutrients, such as: copper (Cu), zinc (Zn), selenium (Se), and child neuropsychological development. The study population consisted of 539 mother-child pairs from Polish Mother and Child Cohort (REPRO_PL). The micronutrient levels were measured in each trimester of pregnancy, at delivery and in the cord blood. Psychomotor development was assessed in children at the age of 1 and 2 years using the Bayley Scales of Infant and Toddler Development. The mean plasma Zn, Cu and Se concentrations in the 1st trimester of pregnancy were 0.91±0.27mg/l, 1.98±0.57mg/l and 48.35±10.54μg/l, respectively. There were no statistically significant associations between Cu levels and any of the analyzed domains of child development. A positive association was observed between Se level in the 1st trimester of pregnancy and child language and motor skills (β=0.18, p=0.03 and β=0.25, p=0.005, respectively) at one year of age. Motor score among one-year-old children decreased along with increasing Zn levels in the 1st trimester of pregnancy and in the cord blood (β=-12.07, p=0.003 and β=-6.51, p=0.03, respectively). A similar pattern was observed for the association between Zn level in the 1st trimester of pregnancy and language abilities at one year of age (β=-7.37, p=0.05). Prenatal Zn and Se status was associated with lower and higher child psychomotor abilities, respectively, within the first year of life. Further epidemiological and preclinical studies are necessary to confirm the associations between micronutrient levels and child development as well as to elucidate the underlying mechanisms of their effects.
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Affiliation(s)
- Kinga Polanska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland.
| | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Anna Krol
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Jolanta Gromadzinska
- Department of Biological and Environmental Monitoring, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Renata Kuras
- Department of Biological and Environmental Monitoring, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Beata Janasik
- Department of Biological and Environmental Monitoring, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Wojciech Wasowicz
- Department of Biological and Environmental Monitoring, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Fiorino Mirabella
- Center for Behavioral Sciences and Mental Health, National Institute of Health, Rome, Italy
| | - Flavia Chiarotti
- Center for Behavioral Sciences and Mental Health, National Institute of Health, Rome, Italy
| | - Gemma Calamandrei
- Center for Behavioral Sciences and Mental Health, National Institute of Health, Rome, Italy
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26
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Selenium and manganese in depression – preclinical and clinical studies. CURRENT ISSUES IN PHARMACY AND MEDICAL SCIENCES 2017. [DOI: 10.1515/cipms-2017-0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
According to the World Health Organization estimates, approximately 10% of the world’s population is affected by depressive disorders. Furthermore, even in high-income countries, many people with depression are not treated, which can lead to serious health consequences and a global economic loss. Unfortunately, the current pharmacotherapy of depressive disorders is characterized by unsatisfactory efficacy and the therapeutic effect is accompanied by many side effects. For this reason, there is still ongoing worldwide research to find new antidepressant therapies. In recent years, many data have been shown that essential elements demonstrate the antidepressant action and increase the effect of antidepressants. In this paper we present the results from the preclinical and clinical studies published over the years which show the involvement of selenium and manganese in depressive disorders. In this article, the relationship between the amount of these microelements in a diet and depression is reviewed and what's more, the association among these elements in different biomaterial and their relations to depressive symptoms is presented. Additionally, we discuss the possible influence of selenium and manganese on modulating neurotransmitter system involved in depression.
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27
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González-Estecha M, Palazón-Bru I, Bodas-Pinedo A, Trasobares E, Palazón-Bru A, Fuentes M, Cuadrado-Cenzual MÁ, Calvo-Manuel E. Relationship between serum selenium, sociodemographic variables, other trace elements and lipid profile in an adult Spanish population. J Trace Elem Med Biol 2017; 43:93-105. [PMID: 28073603 DOI: 10.1016/j.jtemb.2016.12.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 12/09/2016] [Accepted: 12/15/2016] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Several studies have shown an inverse relationship between selenium status and cardiovascular health, although epidemiologic evidence yielded by the randomized trials did not find a beneficial effect of selenium administration. The aim of this study was to analyze the association between serum selenium levels and lipid profile adjusted by age, sex and other associated factors among a general adult population in Spain. MATERIALS AND METHODS We recruited 372 hospital employee volunteers (60 men and 312 women) with a mean age of 47 (SD: 10.9), whom were given a standardized questionnaire. Serum selenium concentration was measured by electrothermal atomization atomic absorption spectrometry. Serum copper and zinc concentrations were measured using flame atomic absorption spectrometry. RESULTS The mean of serum selenium was 79.5μg/L (SD: 11.7) with no sex-dependent differences. In the multivariate linear regression analysis, the associated factors with the mean levels of selenium were: age (β=0.223; CI 95%: 0.101-0.345), p<0.001; widowhood (β=-9.668; CI 95%: -17.234 to -2.102), p=0.012; calcium supplements (β=3.949; CI 95%: 0.059-7.838), p=0.047; zinc (β=0.126; CI 95%: 0.013-0.238), p=0.028 and glucose (β=0.172; CI 95%: 0.062- 0.281), p=0.002; Participants with serum selenium≥79.5μg/L were 1.98 (OR=1.98; CI 95% 1.17-3.35; p=0.011) and 2.04 times (OR=2.04; CI 95% 1.06-3.97; p=0.034) more likely to have cholesterol ≥200mg/dL and LDL-c ≥100mg/dL respectively than those with serum selenium <79.5μg/L. CONCLUSIONS Higher selenium was positively associated with increased total and LDL cholesterol but not with HDL-c and triglycerides. More studies are needed in order to confirm the lower serum selenium findings in widows.
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Affiliation(s)
| | - Irene Palazón-Bru
- Laboratory Medicine Department, Hospital Clínico San Carlos, Madrid, Spain
| | - Andrés Bodas-Pinedo
- Pediatric Department, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Elena Trasobares
- Laboratory Medicine Department, Hospital Clínico San Carlos, Madrid, Spain
| | - Antonio Palazón-Bru
- Department of Clinical Medicine, Miguel Hernández University, San Juan de Alicante, Spain
| | - Manuel Fuentes
- Epidemiology Department, Hospital Clínico San Carlos, Universidad Alfonso X el Sabio, Madrid, Spain
| | | | - Elpidio Calvo-Manuel
- Internal Medicine Department, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, Madrid, Spain
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28
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Janasik B, Zawisza A, Malachowska B, Fendler W, Stanislawska M, Kuras R, Wasowicz W. Relationship between arsenic and selenium in workers occupationally exposed to inorganic arsenic. J Trace Elem Med Biol 2017; 42:76-80. [PMID: 28595795 DOI: 10.1016/j.jtemb.2017.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 03/21/2017] [Accepted: 04/12/2017] [Indexed: 11/29/2022]
Abstract
The interaction between arsenic (As) and selenium (Se) has been one of the most extensively studied. The antagonism between As and Se suggests that low Se status plays an important role in aggravating arsenic toxicity in diseases development. The objective of this study was to assess the Se contents in biological samples of inorganic As exposed workers (n=61) and in non-exposed subjects (n=52). Median (Me) total arsenic concentration in urine of exposed workers was 21.83μg/g creat. (interquartile range (IQR) 15.49-39.77) and was significantly higher than in the control group - (Me 3.75μg/g creat. (IQR 2.52-9.26), p<0.0001). The median serum Se concentrations in the study group and the control were: 54.20μg/l (IQR 44.2-73.10μg/l) and 55.45μg/l (IQR 38.5-69.60μg/l) respectively and did not differ significantly between the groups. In the exposed group we observed significantly higher urine concentrations of selenosugar 1 (SeSug 1) and selenosugar 3 (SeSug3) than in the control group Me: 1.68μg/g creat. (IQR 1.25-2.97 vs Me: 1.07μg/g creat. (IQR 0.86-1.29μg/g), p<0.0001 for SeSug1; Me: 0.45μg/g creat. (IQR 0.26-0.69) vs Me: 0.28μg/g creat. (IQR 0.17-0.45μg/g), p=0.0021). In the multivariate model, after adjusting to cofounders (age, BMI, job seniority time, consumption of fish and seafood and smoking habits) the high rate of arsenic urine wash out (measured as a sum of iAs+MMA+DMA) was significantly associated with the high total selenium urine excretion (B=0.14 (95%CI (confidence interval) 0.05-0.23)). Combination of both arsenic and selenium status to assess the risk of arsenic-induced diseases requires more studies with regard to both the analysis of speciation, genetics and the influence of factors such as nutritional status.
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Affiliation(s)
- Beata Janasik
- Nofer Institute of Occupational Medicine, Department of Environmental and Biological Monitoring, Lodz, Poland.
| | - Anna Zawisza
- Department of Organic and Applied Chemistry, University of Lodz, Poland
| | - Beata Malachowska
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, Poland; Postgraduate School of Molecular Medicine, Medical University of Warsaw, Poland
| | - Wojciech Fendler
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, Poland
| | - Magdalena Stanislawska
- Nofer Institute of Occupational Medicine, Department of Environmental and Biological Monitoring, Lodz, Poland
| | - Renata Kuras
- Nofer Institute of Occupational Medicine, Department of Environmental and Biological Monitoring, Lodz, Poland
| | - Wojciech Wasowicz
- Nofer Institute of Occupational Medicine, Department of Environmental and Biological Monitoring, Lodz, Poland
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29
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Kim HJ, Lim HS, Lee KR, Choi MH, Kang NM, Lee CH, Oh EJ, Park HK. Determination of Trace Metal Levels in the General Population of Korea. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14070702. [PMID: 28661432 PMCID: PMC5551140 DOI: 10.3390/ijerph14070702] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 06/27/2017] [Accepted: 06/27/2017] [Indexed: 12/14/2022]
Abstract
The purpose of this study was to determine the levels of trace metals in the blood of the general Korean population. A total of 258 healthy individuals, according to their regular medical check-ups, (119 males and 139 females, age ranging from 12 to 78 years old) were enrolled from December 2014 to December 2016. Levels of 10 trace elements were determined using inductively coupled plasma mass spectrometry (ICP-MS). The geometric mean (GM) levels for lead, arsenic, cesium, mercury, aluminum, cadmium, copper, manganese, selenium, and zinc were 15.97 μg/L, 7.19 μg/L, 2.39 μg/L, 3.41 μg/L, 10.57 μg/L, 0.78 μg/L, 979.8 μg/L, 11.06 μg/L, 111.37 μg/L, and 872.7 μg/L, respectively. There were significant gender-related differences in the levels of several metals; male individuals had higher Pb, As, Cs, Hg, and Se than females, while females had higher Cd, Cu, and Mn than males. We noticed remarkably high blood levels of Hg, As and Al in the Korean population. The element concentrations reported represent a new contribution to the knowledge of the blood chemistry for the Korea population. The data can be used to assess the clinical health of this population.
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Affiliation(s)
- Hyun-Jun Kim
- Departments of Obstetrics and Gynecology, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Hwan-Sub Lim
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
| | - Mi-Hyun Choi
- Department of Biomedical Engineering, Research Institute of Biomedical Engineering, College of Science & Technology, Konkuk University, Chungju 27478, Korea.
| | | | - Chang Hoon Lee
- Department of Laboratory Medicine, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Eun-Jung Oh
- Department of Family Medicine, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Hyun-Kyung Park
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
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30
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Fedor M, Socha K, Urban B, Soroczyńska J, Matyskiela M, Borawska MH, Bakunowicz-Łazarczyk A. Serum Concentration of Zinc, Copper, Selenium, Manganese, and Cu/Zn Ratio in Children and Adolescents with Myopia. Biol Trace Elem Res 2017; 176:1-9. [PMID: 27424299 DOI: 10.1007/s12011-016-0805-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 07/06/2016] [Indexed: 11/27/2022]
Abstract
The purpose of the present study was the assessment of the serum concentration of antioxidant microelements-zinc, copper, selenium, manganese, and Cu/Zn ratio in children and adolescents with myopia. Eighty-three children were examined (mean age 14.36 ± 2.49 years) with myopia. The control group was 38 persons (mean age 12.89 ± 3.84 years). Each patient had complete eye examination. The serum concentration of zinc, copper, manganese, and selenium was determined by atomic absorption spectrometry. Cu/Zn ratio, which is the indicator of the oxidative stress, was also calculated. The average serum concentration of zinc in myopic patients was significantly lower (0.865 ± 0.221 mg L-1) in comparison to the control group (1.054 ± 0.174 mg L-1). There was significantly higher Cu/Zn ratio in myopic patients (1.196 ± 0.452) in comparison to that in the control group (0.992 ± 0.203). The average serum concentration of selenium in the study group was significantly lower (40.23 ± 12.07 μg L-1) compared with that in the control group (46.00 ± 12.25 μg L-1). There were no essential differences between serum concentration of copper and manganese in the study group and the control group. Low serum concentration of zinc and selenium in myopic children may imply an association between insufficiency of these antioxidant microelements and the development of the myopia and could be the indication for zinc and selenium supplementation in the prevention of myopia. Significantly, higher Cu/Zn ratio in the study group can suggest the relationship between myopia and oxidative stress.
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Affiliation(s)
- Monika Fedor
- Department of Pediatric Ophthalmology and Strabismus, The Medical University of Bialystok Children's Clinical Hospital, Waszyngtona 17, 15-274, Bialystok, Poland.
| | - Katarzyna Socha
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D, 15-222, Białystok, Poland
| | - Beata Urban
- Department of Pediatric Ophthalmology and Strabismus, Medical University of Bialystok, Waszyngtona 17, 15-274, Bialystok, Poland
| | - Jolanta Soroczyńska
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D, 15-222, Białystok, Poland
| | - Monika Matyskiela
- Department of Pediatric Ophthalmology and Strabismus, The Medical University of Bialystok Children's Clinical Hospital, Waszyngtona 17, 15-274, Bialystok, Poland
| | - Maria H Borawska
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D, 15-222, Białystok, Poland
| | - Alina Bakunowicz-Łazarczyk
- Department of Pediatric Ophthalmology and Strabismus, Medical University of Bialystok, Waszyngtona 17, 15-274, Bialystok, Poland
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31
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Abass K, Koiranen M, Mazej D, Tratnik JS, Horvat M, Hakkola J, Järvelin MR, Rautio A. Arsenic, cadmium, lead and mercury levels in blood of Finnish adults and their relation to diet, lifestyle habits and sociodemographic variables. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:1347-1362. [PMID: 27778267 DOI: 10.1007/s11356-016-7824-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
The Northern Finland Birth Cohort program (NFBC) is the epidemiological and longitudinal prospective general population research program, which was established to promote health and wellbeing of the population in northern Finland. The aim of present study, as a part of the NFBC program, was to analyze the blood levels of arsenic (B-As), cadmium (B-Cd), lead (B-Pb), total mercury (B-Hg) and selenium (B-Se); to compare these levels with threshold limits; to study sociodemographic factors; and to correlate these levels with calcium and haemoglobin. The study was comprised of 249 NFBC subjects, of which 123 were female and 126 were male (ages 31.1 ± 0.3 and 31.1 ± 0.4, respectively). All participants were asked to complete a questionnaire regarding diet and living habits. The geometric means (± SD) of B-As were 0.49 ± 2.80 μg/l and 0.44 ± 2.72 μg/l; B-Cd were 0.18 ± 4.02 μg/l and 0.12 ± 3.21 μg/l; B-Pb were 17.0 ± 1.8 μg/l and 9.06 ± 2.20 μg/l; B-Hg were 2.18 ± 2.02 μg/l and 1.85 ± 1.78 μg/l; and B-Se were 106.0 ± 1.3 and 94.3 ± 1.3 μg/l in males and females, respectively. Among the subjects in the present analysis, 23 % of males and 17.1 % of females had B-As levels above the ATSDR normal human levels of B-As in unexposed individuals (1.0 μg/l). The B-Pb geometric mean (12.44 μg/l) was approximately one eighth the CDC toxicological cut-off point of 100 μg/l. Twenty-one individuals (8.4 %) exceeded a B-Hg level of 5.8 μg/l. Fifty-eight females (47 %) had a B-Hg higher than 2.0 μg/l, the German Federal Environmental Agency cut-off point for women (18-69 years) who consume fish at least three times/month; therefore, their babies could be at risk of adverse effects during development.
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Affiliation(s)
- Khaled Abass
- Research Unit of Biomedicine, University of Oulu, Oulu, Finland.
- Medical Research Centre Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.
- Centre for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland.
- Department of Pesticides, Menoufia University, P.O. Box 32511, Menoufia, Egypt.
| | - Markku Koiranen
- Institute of Health Sciences, University of Oulu, Oulu, Finland
| | - Darja Mazej
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Janja Snoj Tratnik
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Milena Horvat
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Jukka Hakkola
- Research Unit of Biomedicine, University of Oulu, Oulu, Finland
- Medical Research Centre Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Marjo-Riitta Järvelin
- Institute of Health Sciences, University of Oulu, Oulu, Finland
- Biocentre Oulu, University of Oulu, Oulu, Finland
- Department of Epidemiology and Biostatistics, MRC PHE Centre for Environment and Health, School of Public Health, Imperial College London, London, UK
| | - Arja Rautio
- Centre for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland
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Michalska-Mosiej M, Socha K, Soroczyńska J, Karpińska E, Łazarczyk B, Borawska MH. Selenium, Zinc, Copper, and Total Antioxidant Status in the Serum of Patients with Chronic Tonsillitis. Biol Trace Elem Res 2016; 173:30-4. [PMID: 26847690 PMCID: PMC4975761 DOI: 10.1007/s12011-016-0634-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 01/26/2016] [Indexed: 11/26/2022]
Abstract
Antioxidants can play a significant role in chronic inflammatory process. The aim of this study was to evaluate the content of selenium (Se), zinc (Zn), copper (Cu), and total antioxidant status (TAS) of patients with chronic tonsillitis (CT). The study group consisted of 84 patients with CT from 18 to 62 years old and the control group of 67 healthy people aged 19-65 years. Se, Zn, and Cu concentration in serum samples were determined by atomic absorption spectrometry. Serum TAS was measured spectrophotometrically, using the test by Randox Laboratories-Us Ltd. The mean content of Se and Zn in the serum of patients with CT (61.122 ± 12.73 μg/L, 0.887 ± 0.26 mg/L, respectively) was lower compared to the control group (77.969 ± 12.73 μg/L, 0.993 ± 0.32 mg/L, respectively). The mean serum concentration of Cu in patients with CT (1.219 ± 0.35 mg/L) was higher compared to its serum concentration in healthy people (1.033 ± 0.37 mg/L). Serum TAS of patients with CT (1.171 ± 0.33 mmol/L) was lower in comparison with healthy volunteers (1.333 ± 0.42 mmol/L). The serum concentration of Se, Zn, and TAS in patients with CT was lower, whereas the concentration of Cu was higher compared to healthy volunteers. Smoking has an influence on reducing the concentration of Se and TAS of patients with CT.
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Affiliation(s)
- Małgorzata Michalska-Mosiej
- Department of Otolaryngology, Regional Hospital of Bialystok, M. Skłodowskiej-Curie 26 St., 15-950, Bialystok, Poland
| | - Katarzyna Socha
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D St., 15-222, Bialystok, Poland
| | - Jolanta Soroczyńska
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D St., 15-222, Bialystok, Poland
| | - Elżbieta Karpińska
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D St., 15-222, Bialystok, Poland
| | - Bogdan Łazarczyk
- Department of Otolaryngology, Regional Hospital of Bialystok, M. Skłodowskiej-Curie 26 St., 15-950, Bialystok, Poland
| | - Maria Halina Borawska
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D St., 15-222, Bialystok, Poland.
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Selenium status during pregnancy and child psychomotor development-Polish Mother and Child Cohort study. Pediatr Res 2016; 79:863-9. [PMID: 26885758 PMCID: PMC4899820 DOI: 10.1038/pr.2016.32] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 12/13/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND The studies on the impact of selenium (Se) levels in different pregnancy periods on child psychomotor functions are limited. The aim of this study was to evaluate the impact of prenatal Se on child neurodevelopment. METHODS The study population consisted of 410 mother-child pairs from Polish Mother and Child Cohort. Se levels were measured in each trimester of pregnancy, at delivery, and in cord blood by graphite furnace atomic absorption spectrometry. Psychomotor development was assessed in children at the age of 1 and 2 y using the Bayley Scales of Infant and Toddler Development. RESULTS Plasma Se levels decreased through pregnancy (from 48.3 ± 10.6 µg/l in the first trimester to 38.4 ± 11.8 µg/l at delivery; P < 0.05). A statistically significant positive association between Se levels in the first trimester of pregnancy and motor development (β = 0.2, P = 0.002) at 1 y of age, and language development (β = 0.2, P = 0.03) at 2 y of age was observed. The positive effect of Se levels on cognitive score at 2 y of age was of borderline significance (β = 0.2, P = 0.05). CONCLUSION Prenatal selenium status was associated with child psychomotor abilities within the first years of life. Further epidemiological and preclinical studies are needed to confirm the association and elucidate the underlying mechanisms of these effects.
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Kieliszek M, Błażejak S. Current Knowledge on the Importance of Selenium in Food for Living Organisms: A Review. Molecules 2016; 21:molecules21050609. [PMID: 27171069 PMCID: PMC6274134 DOI: 10.3390/molecules21050609] [Citation(s) in RCA: 236] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/02/2016] [Accepted: 05/05/2016] [Indexed: 12/21/2022] Open
Abstract
Selenium is one of the elements classified within the group of micronutrients which are necessary in trace amounts for the proper functioning of organisms. Selenium participates in the protection of cells against excess H2O2, in heavy metal detoxification, and regulation of the immune and reproductive systems as well. It also ensures the proper functioning of the thyroid gland. Selenium induces the occurrence of the selenoprotein synthesis process involved in the antioxidant defense mechanism of the organism. Recent years have brought much success in the studies on selenium. Anticarcinogenic properties of selenium against some cancers have been reported. Supplementation is increasingly becoming a solution to this problem. A large number of different supplementation methods are promoting studies in this area. Slight differences in the selenium content can result in excess or deficiency, therefore supplementation has to be done carefully and cautiously.
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Affiliation(s)
- Marek Kieliszek
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland.
| | - Stanisław Błażejak
- Faculty of Food Sciences, Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 C, 02-776 Warsaw, Poland.
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Gong J, Xiao M. Selenium and Antioxidant Status in Dairy Cows at Different Stages of Lactation. Biol Trace Elem Res 2016; 171:89-93. [PMID: 26384688 DOI: 10.1007/s12011-015-0513-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 09/09/2015] [Indexed: 11/26/2022]
Abstract
Thirty-five multiparous Holstein cows averaging 550 ± 50 kg of body weight and in 2 to 4 parity were divided into three groups according to lactation stage (group A: nine cows from 4 to 1 weeks prepartum; group B: 11 cows from 1 to 30 days postpartum; group C: 15 cows from 30 to 100 days postpartum). Selenium concentration, malondialdehyde (MDA) level, glutathione peroxidase (GSH-Px) activity, thioredoxin reductase (TrxR) activity, and total antioxidant status (TAS) in serum were determined to evaluate selenium and antioxidant status in dairy cows at different stages of lactation. The results showed that mean serum selenium concentration, MDA level, and GSH-Px activity of cows in early lactation increased significantly (P < 0.05) when compared with cows in the dry period and peak lactation. Conversely, serum TrxR activity and TAS declined during this period (P < 0.05). The increase of serum MDA level during early lactation indicate that the reactive oxygen species, including lipid hydroperoxides, increase in this period, thus placing the cows at a greater risk of oxidative stress. The significant decrease in TrxR activity that is accompanied with a decrease in TAS during early lactation suggests that dairy cows have low antioxidant defense in this period and TrxR may be an important antioxidant defense mechanism in transition dairy cows.
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Affiliation(s)
- Jian Gong
- College of Life Science and Technology, Inner Mongolia Normal University, Hohhot, 010022, China.
| | - Min Xiao
- College of Life Science and Technology, Inner Mongolia Normal University, Hohhot, 010022, China
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Omeljaniuk WJ, Socha K, Borawska MH, Charkiewicz AE, Laudański T, Kulikowski M, Kobylec E. Antioxidant status in women who have had a miscarriage. Adv Med Sci 2015; 60:329-34. [PMID: 26233636 DOI: 10.1016/j.advms.2015.06.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 05/06/2015] [Accepted: 06/15/2015] [Indexed: 01/26/2023]
Abstract
PURPOSE During normal pregnancy there is an oxido-reductive balance between action of pro-oxidative factors. The aim of this study was to evaluate the total antioxidant status (TAS) and glutathione peroxidase (GSH-Px) activity, and the content of selenium (Se), zinc (Zn), copper (Cu) and manganese (Mn) in women who have had a miscarriage. PATIENTS AND METHODS The study group consisted of 83 women who had had miscarriages. The control group included 35 women in the first trimester of pregnancy, and 35 pregnant women after childbirth. RESULTS TAS activity and Cu concentration in serum in women who experienced a miscarriage were significantly lower, but Mn level - higher, than in women in the first trimester of pregnancy. The content of Se, Cu and Mn in placental tissue in patients who have had a miscarriage was significantly higher, while Zn content was lower than in pregnant women at full-term delivery. CONCLUSIONS Our findings, provided in the research, enable us to claim that the total antioxidative status is significantly lower in women who have had a miscarriage. Low level of Zn but high of Mn in the examined biological material may be indicative to the incidence of miscarriage.
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Affiliation(s)
| | - Katarzyna Socha
- Department of Bromatology, Medical University of Bialystok, Bialystok, Poland
| | - Maria H Borawska
- Department of Bromatology, Medical University of Bialystok, Bialystok, Poland.
| | | | - Tadeusz Laudański
- Department of Perinatology, Medical University of Bialystok Clinical Hospital, Bialystok, Poland
| | - Marek Kulikowski
- Department of Perinatology, Medical University of Bialystok Clinical Hospital, Bialystok, Poland
| | - Edward Kobylec
- Division of Obstetrics and Pathology of Pregnancy, SPZOZ District Hospital in Bialystok, Bialystok, Poland
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Abstract
This article presents a study of dietary supplements available on the Polish market. The supplements comprised a large group of products with selenium content declared by the producer. The study involved determination of dissolution time under different conditions and solubility as well as content and speciation of selenium. The total content was determined as well as organic selenium and the inorganic forms Se(IV) and Se(VI). The organic selenium content was calculated as the difference between total Se and inorganic Se. The values obtained were compared with producers' declarations. The work is the first such study of selenium supplements available on the market of an EU Member State.
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Abstract
This review aims to illustrate the importance of selenium (Se) for maintenance of overall health, especially for the thyroid, immunity, and homeostasis. Furthermore, it outlines the role of Se in reproduction and in virology and discusses the effects of Se supplementation in critical illness. The multifaceted aspects of this essential nutrient have attracted worldwide clinical and research interest in the last few decades. Se exerts its activity in the form of the aminoacid selenocysteine incorporated in selenoproteins. The impact of Se administration should be considered in relation to its apparent U shaped effects, i.e., exhibiting major advantages in Se-deficient individuals but specific health risks in those with Se excess. Addition of selenium to the administration of levothyroxine may be useful in patients with low Se intake and with mild-form or early-stage Hashimoto's thyroiditis (HT). Serum Se concentration (possibly also at tissue level) decreases in inflammatory conditions and may vary with the severity and duration of the inflammatory process. In such cases, the effect of Se supplementation seems to be useful and rational. Meanwhile, Se's ability to improve the activity of T cells and the cytotoxicity of natural killer cells could render it effective in viral disease. However, the evidence, and this should be stressed, is at present conflicting as to whether Se supplementation is of benefit in patients with HT, though there are indications that it is advantageous in cases of mild/moderate Graves' Orbitopathy. The role of Se in type 2 diabetes mellitus (T2DM) is ambiguous, driven by both Se intake and serum levels. The evidence that insulin and glycaemia influence the transport and activity of Se, via regulatory activity on selenoproteins, and that high serum Se may have a diabetogenic effect suggests a 'Janus-effect' of Se in T2DM. Though the evidence is not as yet clear-cut, the organic form (selenomethionine), due to its pharmacokinetics, is likely to be more advantageous in long-term prevention, and supplementation efforts, while the inorganic form (sodium selenite) has proven effective in an acute, e.g., sepsis, clinical setting. Recent data indicate that functional selenoprotein single-nucleotide polymorphisms (SNPs) may interfere with Se utilization and effectiveness.
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Affiliation(s)
- Leonidas H Duntas
- Unit of Endocrinology, Metabolism and Diabetes, Evgenidion Hospital, University of Athens, School of Medicine, 20 Papadiamantopoulou St, 115 28, Athens, Greece,
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Błażewicz A, Klatka M, Astel A, Korona-Glowniak I, Dolliver W, Szwerc W, Kocjan R. Serum and urinary selenium levels in obese children: a cross-sectional study. J Trace Elem Med Biol 2015; 29:116-22. [PMID: 25194955 DOI: 10.1016/j.jtemb.2014.07.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 07/18/2014] [Accepted: 07/25/2014] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To determine serum and urinary selenium (Se) levels in children with and without obesity, and to assess if Se influences the risk of obesity. SUBJECTS AND METHODS High-resolution-continuum source-atomic absorption spectrometry (HR-CS-AAS) was used to determine the content of Se in 80 children (age 6-17; 40 boys, 40 girls). Correlations between variables were tested with the use of Spearman's correlation coefficient. U Mann-Whitney test was applied to assess the difference of Se contents in samples. Measured metabolic risk factors (blood pressure, glucose level, triglycerides (TG), low-density lipoprotein (LDL), high-density lipoprotein (HDL), and total cholesterol), age, gender, and BMI were correlated. Logistic regression models were fitted to identify predictors of obesity interacting with selenium content in serum and urine, separately. RESULTS Obese children, regardless of gender, had lower Se content. Se level in serum (p=0.001, OR 0.74, 95%CI 0.62-0.88) and total cholesterol (p=0.001, OR 1.19, 95%CI 1.08-1.31) were the independent factors significantly influencing the risk of obesity in children. Two separate models were observed for Se in urine: (i) Se level (p<0. 0001, OR 0.70, 95%CI 0.58-0.84) and glucose level (p<0.0001, OR 1.22, 95%CI 1.10-1.35), and (ii) Se level (p=0.002, OR 0.60 95%CI 0.43-0.83) and total cholesterol level (p=0.003, OR 1.16, 95%CI 1.05-1.28). CONCLUSION The current study suggests a possible role of Se in obesity. Further research needs to be performed to check if obese children are an at-risk group for Se deficiency.
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Affiliation(s)
- Anna Błażewicz
- Department of Analytical Chemistry, Medical University of Lublin, Poland.
| | - Maria Klatka
- Department of Pediatric Endocrinology and Diabetology, Medical University of Lublin, Poland
| | - Aleksander Astel
- Pomeranian University, Biology and Environmental Protection Institute, Environmental Chemistry Research Unit, Słupsk, Poland
| | | | - Wojciech Dolliver
- Department of Analytical Chemistry, Medical University of Lublin, Poland
| | - Wojciech Szwerc
- Department of Analytical Chemistry, Medical University of Lublin, Poland
| | - Ryszard Kocjan
- Department of Analytical Chemistry, Medical University of Lublin, Poland
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Bodnar M, Szczyglowska M, Konieczka P, Namiesnik J. Methods of Selenium Supplementation: Bioavailability and Determination of Selenium Compounds. Crit Rev Food Sci Nutr 2014; 56:36-55. [DOI: 10.1080/10408398.2012.709550] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Socha K, Kochanowicz J, Karpińska E, Soroczyńska J, Jakoniuk M, Mariak Z, Borawska MH. Dietary habits and selenium, glutathione peroxidase and total antioxidant status in the serum of patients with relapsing-remitting multiple sclerosis. Nutr J 2014; 13:62. [PMID: 24943732 PMCID: PMC4080729 DOI: 10.1186/1475-2891-13-62] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 06/11/2014] [Indexed: 12/23/2022] Open
Abstract
Background Dietary habits and adequate dietary intake of antioxidants in the diet may be one of the most important environmental factors for the prevention of Multiple Sclerosis (MS). Objectives The aim of this study was to estimate selenium (Se) concentration, glutathione peroxidase (GSH-Px) activity and total antioxidant status (TAS) in the serum of patients with MS and the influence of dietary habits on the status. Methods 101 patients with relapsing-remitting MS (aged 18-58 years), as well as control group of 63 healthy people (aged 19-65 years) were studied. Food-frequency questionnaires were implemented to collect the dietary data. Se concentration in the serum samples was determined by atomic absorption spectrometry. GSH-Px activity and TAS in examined serum was measured using the ready-made sets of tests by Randox Laboratories Ltd., UK. Results Serum Se concentration and GSH-Px activity in the serum of patients with MS (55.2±16.2 μg/L, 6676.1±2386.4 U/L; respectively) were significantly decreased (p<0.01, p<0.05; respectively) compared with control group (79.2±20.6 μg/L, 8029.9±2650.1 U/L; respectively). A significant correlation (r=0.39, p<0.01) was observed between Se concentration and GSH-Px activity in the serum of examined patients. TAS value in the serum of patients with MS (1.03±0.37 mmol/L) was also significantly lower (p<0.01) than in healthy volunteers (1.48±0.41 mmol/L). Frequent consumption of poultry, bakery products, pulses and fish seemed to increase serum Se concentration in the group of patients; whereas frequent consumption of butter, wholegrain bread, sweet beverages and sugar was found to accompany with lower values of Se in the serum. We have observed significant decrease TAS (p<0.05, p<0.01; respectively) in the serum of smokers and those patients who received immunomodulatory drugs (0.95±0.39 mmol/L, 0.92±0.34 mmol/L; respectively) compared with no-smoking patients and not taking immunomodulators (1.14±0.33 mmol/L, 1.31±0.31 mmol/L; respectively). Conclusions Serum Se concentration, GSH-Px activity and TAS value were significantly lower in patients with relapsing-remitting MS compared with healthy volunteers. Dietary habits have a significant influence on Se status. Smoking cigarettes and intake of immunomodulatory drugs therapy have a negative impact on TAS of examined patients.
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Affiliation(s)
- Katarzyna Socha
- Department of Bromatology, Medical University of Bialystok, Mickiewicza 2D St, Bialystok 15-222, Poland.
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Kalisinska E, Gorecki J, Okonska A, Pilarczyk B, Tomza-Marciniak A, Budis H, Lanocha N, Kosik-Bogacka DI, Kavetska KM, Macherzynski M, Golas JM. Mercury and selenium in the muscle of piscivorous common mergansers (Mergus merganser) from a selenium-deficient European country. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 101:107-15. [PMID: 24507135 DOI: 10.1016/j.ecoenv.2013.12.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 12/16/2013] [Accepted: 12/20/2013] [Indexed: 05/06/2023]
Abstract
Although the relationship between mercury (Hg) and selenium (Se) has been studied in wild birds in areas with sufficient or excessive Se levels, little is known about this relationship in areas where the supply of Se is limited. As Hg detoxification is based on the production of biologically inactive Hg-Se complexes, the aim of this study was to investigate the relationships between the concentrations of total mercury (THg), methylmercury (MeHg), inorganic mercury (InHg=THg-MeHg), percent MeHg of THg, Se and molar ratios (THg:Se, MeHg:Se, InHg:Se) in the breast muscle (n=16) of the piscivorous common mergansers (Mergus merganser) from a Se-deficient and moderately Hg-polluted area in Poland. Mergansers were divided into two groups differing in condition (A-very good condition; C-moderate condition). Concentrations of THg, MeHg and Se were determined by atomic absorption spectrometry, modified gas chromatography atomic fluorescence spectroscopy, and spectrofluorometric methods, respectively. In all studied mergansers, mean concentrations of THg, MeHg, InHg, and Se in muscle were 2.63, 1.92, 0.46, and 0.54µgg(-1)dw, respectively. THg and MeHg concentrations in the muscle of group A mergansers were greater than in group C. The ratio of THg:Se was higher in group A than in group C (2.32 vs 1.36; p<0.01), as well as the molar ratio of MeHg:Se (A vs C: 1.98 vs 1.03; p<0.05). Comparisons between mergansers from Poland and Canada showed similar THg and percent MeHg in the muscle, but mergansers from Poland had several times lower Se levels and higher THg:Se ratios (>2.0) than the Canadian mergansers and other European and North American waterbirds. We found statistically significant positive correlations (MeHg-THg, percent MeHg/THg-MeHg, percent InHg/THg-InHg, THg:Se-THg, MeHg:Se-THg, THg:Se-MeHg, MeHg:Se-MeHg, InHg:Se-InHg, MeHg:Se-THg:Se) and some negative correlations (percent InHg/THg-MeHg, percent MeHg/THg-InHg, THg:Se-Se, MeHg:Se-Se). As THg and percent MeHg in the studied mergansers were similar to populations living in non-Se-deficient areas, it is likely that different mechanisms of muscle Hg detoxification have evolved in mergansers populations living in Se-deficient areas.
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Affiliation(s)
- Elzbieta Kalisinska
- Department of Biology and Medical Parasitology, Pomeranian Medical University, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Jerzy Gorecki
- Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Anna Okonska
- Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Bogumila Pilarczyk
- Department of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology, Doktora Judyma 10, 71-466 Szczecin, Poland
| | - Agnieszka Tomza-Marciniak
- Department of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology, Doktora Judyma 10, 71-466 Szczecin, Poland
| | - Halina Budis
- Department of Biology and Medical Parasitology, Pomeranian Medical University, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Natalia Lanocha
- Department of Biology and Medical Parasitology, Pomeranian Medical University, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Danuta I Kosik-Bogacka
- Department of Biology and Medical Parasitology, Pomeranian Medical University, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland.
| | - Katarzyna M Kavetska
- Laboratory of Biology and Ecology of Parasites, West Pomeranian University of Technology, Doktora Judyma 10, 71-466 Szczecin, Poland
| | - Mariusz Macherzynski
- Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Janusz M Golas
- Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
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Hargreaves MK, Liu J, Buchowski MS, Patel KA, Larson CO, Schlundt DG, Kenerson DM, Hill KE, Burk RF, Blot WJ. Plasma selenium biomarkers in low income black and white americans from the southeastern United States. PLoS One 2014; 9:e84972. [PMID: 24465457 PMCID: PMC3896351 DOI: 10.1371/journal.pone.0084972] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 11/27/2013] [Indexed: 11/18/2022] Open
Abstract
Biomarkers of selenium are necessary for assessing selenium status in humans, since soil variation hinders estimation of selenium intake from foods. In this study, we measured the concentration of plasma selenium, selenoprotein P (SEPP1), and glutathione peroxidase (GPX3) activity and their interindividual differences in 383 low-income blacks and whites selected from a stratified random sample of adults aged 40-79 years, who were participating in a long-term cohort study in the southeastern United States (US). We assessed the utility of these biomarkers to determine differences in selenium status and their association with demographic, socio-economic, dietary, and other indicators. Dietary selenium intake was assessed using a validated food frequency questionnaire designed for the cohort, matched with region-specific food selenium content, and compared with the US Recommended Dietary Allowances (RDA) set at 55 µg/day. We found that SEPP1, a sensitive biomarker of selenium nutritional status, was significantly lower among blacks than whites (mean 4.4 ± 1.1 vs. 4.7 ± 1.0 mg/L, p = 0.006), with blacks less than half as likely to have highest vs. lowest quartile SEPP1 concentration (Odds Ratio (OR) 0.4, 95% Confidence Interval (CI) 0.2-0.8). The trend in a similar direction was observed for plasma selenium among blacks and whites, (mean 115 ± 15.1 vs. 118 ± 17.7 µg/L, p = 0.08), while GPX3 activity did not differ between blacks and whites (136 ± 33.3 vs. 132 ± 33.5 U/L, p = 0.320). Levels of the three biomarkers were not correlated with estimated dietary selenium intake, except for SEPP1 among 10% of participants with the lowest selenium intake (≤ 57 µg/day). The findings suggest that SEPP1 may be an effective biomarker of selenium status and disease risk in adults and that low selenium status may disproportionately affect black and white cohort participants.
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Affiliation(s)
- Margaret K. Hargreaves
- Department of Internal Medicine, Meharry Medical College, Nashville, Tennessee, United States of America
| | - Jianguo Liu
- Department of Internal Medicine, Meharry Medical College, Nashville, Tennessee, United States of America
| | - Maciej S. Buchowski
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Kushal A. Patel
- Department of Public Health, Health Administration and Health Sciences, Tennessee State University, Nashville, Tennessee, United States of America
| | - Celia O. Larson
- Department of Population Health, Metro Public Health Department, Nashville, Tennessee, United States of America
| | - David G. Schlundt
- Department of Psychology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Donna M. Kenerson
- Department of Internal Medicine, Meharry Medical College, Nashville, Tennessee, United States of America
| | - Kristina E. Hill
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Raymond F. Burk
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - William J. Blot
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
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Meta-analysis of selenium accumulation and expression of antioxidant enzymes in chicken tissues. Animal 2014; 8:542-54. [PMID: 24388007 DOI: 10.1017/s1751731113002395] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A meta-analysis integrating results of 40 selenium (Se) supplementation experiments that originated from 35 different controlled randomized trials was carried out in an attempt to identify significant factors that affect tissue Se accumulation in chicken. Examined factors included: Se source (12 different sources examined), type of chicken (laying hens or broilers), age of birds at the beginning of supplementation, duration of supplementation, year during which the study was conducted, sex of birds, number of chickens per treatment, method of analysis, tissue type, concentration of Se determined and Se added to feed. A correlation analysis was also carried out between tissue Se concentration and glutathione peroxidase activity. Data analysis showed that the factors significantly affecting tissue Se concentration include type of chicken (P=0.006), type of tissue (P<0.001) and the analytical method used (P=0.014). Although Se source was not found to affect tissue Se concentration (overall P>0.05), certain inorganic (sodium selenite), calcium selenite, sodium selenate and organic sources (B-Traxim Se), Se-yeast, Se-malt, Se-enriched cabbage and Se-enriched garlic as well as background Se level from feed ingredients were found to significantly affect tissue Se concentration. The Se accumulation rate (estimated as linear regression coefficient of Se concentrations to Se added to feed) discriminated between the various tissues with highest values estimated in the leg muscle and lowest in blood plasma. Correlation analysis has also shown that tissue Se concentration (pooled data) was correlated to Se added to feed (r=0.529, P<0.01, log values) and to glutathione peroxidase activity (r=0.332, P=0.0478), with the latter not being correlated with Se added to feed. Although significant factors affecting Se concentration were reported in the present study, they do not necessarily indicate the in vivo function of the antioxidant system or the level of accumulated Se as other factors, not examined in the present study, may interact at the level of trace element absorption, distribution and retention.
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Scientific Opinion on nutrient requirements and dietary intakes of infants and young children in the European Union. EFSA J 2013. [DOI: 10.2903/j.efsa.2013.3408] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Jablonska E, Gromadzinska J, Klos A, Bertrandt J, Skibniewska K, Darago A, Wasowicz W. Selenium, zinc and copper in the Polish diet. J Food Compost Anal 2013. [DOI: 10.1016/j.jfca.2013.05.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Moya M, Bautista EG, Velázquez-González A, Vázquez-Gutiérrez F, Tzintzun G, García-Arreola ME, Castillejos M, Hernández A. Potentially-toxic and essential elements profile of AH1N1 patients in Mexico City. Sci Rep 2013; 3:1284. [PMID: 23422930 PMCID: PMC3576630 DOI: 10.1038/srep01284] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 01/25/2013] [Indexed: 01/06/2023] Open
Abstract
During spring of 2009, a new influenza virus AH1N1 spread in the world causing acute respiratory illness and death, resulting in the first influenza pandemic since 1968. Blood levels of potentially-toxic and essential elements of 40 pneumonia and confirmed AH1N1 were evaluated against two different groups of controls, both not infected with the pandemic strain. Significant concentrations of potentially-toxic elements (lead, mercury, cadmium, chromium, arsenic) along with deficiency of selenium or increased Zn/Cu ratios characterized AH1N1 cases under study when evaluated versus controlled cases. Deficiency of selenium is progressively observed from controls I (influenza like illness) through controls II (pneumonia) and finally pneumonia -AH1N1 infected patients. Cases with blood Se levels greater than the recommended for an optimal cut-off to activate glutathione peroxidase (12.5 μg/dL) recovered from illness and survived. Evaluation of this essential element in critical pneumonia patients at the National Institutes is under evaluation as a clinical trial.
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Affiliation(s)
- Mireya Moya
- National Institute for Respiratory Diseases-Mexico, Mexico.
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Navia B, Ortega RM, Perea JM, Aparicio A, López-Sobaler AM, Rodríguez-Rodríguez E. Selenium status in a group of schoolchildren from the region of Madrid, Spain. J Hum Nutr Diet 2013; 27 Suppl 2:239-46. [PMID: 23679102 DOI: 10.1111/jhn.12126] [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: 11/28/2022]
Abstract
BACKGROUND To assess the selenium status of a group of schoolchildren from the Region of Madrid, Spain. METHODS Study subjects comprised 483 children (216 boys and 267 girls) aged between 8 and 13 years. Selenium intake was determined using a 3-day food record. The foods consumed were transformed into energy and nutrients, and the selenium intake was compared with that recommended. Serum selenium levels were also recorded. RESULTS Mean (SD) selenium intake [91.0 (25.2) μg day(-1) ] was above the recommended level in 99.4% of subjects; the main dietary sources were cereals, meats, fish and milk products. The serum selenium concentration [mean (SD) 71.1 (14.4) μg L(-1) ], however, was <60 μg L(-1) in 13.9% of subjects, and <45 μg L(-1) in 5.6%. The serum selenium concentration correlated with the selenium intake (r = 0.169; P < 0.05). Children with a serum selenium concentration of <75 μg L(-1) had significantly smaller selenium intakes than those with a serum concentration of ≥75 μg L(-1) . CONCLUSIONS Although selenium intake was generally above that recommended, the serum selenium concentration of the children could be improved. This could be achieved by increasing the relative consumption of cereals and other selenium rich foods such as fish.
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Affiliation(s)
- B Navia
- Departamento de Nutrición, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
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Kieliszek M, Błażejak S. Selenium: Significance, and outlook for supplementation. Nutrition 2013; 29:713-8. [DOI: 10.1016/j.nut.2012.11.012] [Citation(s) in RCA: 225] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 11/16/2012] [Accepted: 11/23/2012] [Indexed: 11/16/2022]
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