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Wahl L, Samson Chillon T, Seemann P, Ohrndorf S, Ochwadt R, Becker W, Schomburg L, Hoff P. Serum selenium, selenoprotein P and glutathione peroxidase 3 in rheumatoid, psoriatic, juvenile idiopathic arthritis, and osteoarthritis. J Nutr Biochem 2024:109776. [PMID: 39389271 DOI: 10.1016/j.jnutbio.2024.109776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 09/20/2024] [Accepted: 09/28/2024] [Indexed: 10/12/2024]
Abstract
INTRODUCTION Selenoprotein P (SELENOP) controls selenium transport, and glutathione peroxidase 3 (GPx3) elicits antioxidant activity in blood. Inflammation associates with Se deficiency, but knowledge concerning selenoproteins in inflammatory rheumatic musculoskeletal diseases (iRMD) is limited. We compared three Se biomarkers in patients with rheumatoid (RA), psoriatic (PsA), and juvenile idiopathic arthritis (JIA) in comparison to osteoarthritis (OA) and healthy subjects, to improve the data base on selenoprotein expression in iRMD. METHODS The cross-sectional study enrolled n=272 patients with RA (n=131), PsA (n=67), JIA (n=22) and OA (n=52). Serum Se was quantified by total reflection X-ray fluorescence, SELENOP by ELISA and GPx3 by an enzymatic test. Data from the EPIC trial served as reference. Impairment of daily life was assessed by the Functional Ability Questionnaire (FfbH). RESULTS Serum SELENOP and Se concentrations correlated linearly in all groups and were below the average measured in EPIC. Se concentration was not different between the patient groups. Compared to controls, SELENOP levels were low in iRMD patients. GPx3 activity was particularly low in JIA and PsA. Seropositive but not seronegative RA patients displayed a disrupted interaction between GPx3 and Se or SELENOP. SELENOP associated with the functional status measured by the FfbH, most pronounced in OA (R=0.76, p<0.01). DISCUSSION The data indicate selenoprotein deficiency in the majority of patients with iRMD, and a positive relation of SELENOP with functional status in OA. Since increased Se supply improves selenoprotein biosynthesis, a personalized correction of diagnosed deficiency merits consideration to improve Se transport and ameliorate disease burden.
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Affiliation(s)
- Lukas Wahl
- MVZ Endokrinologikum Berlin am Gendarmenmarkt, Friedrichstr. 76, 10117 Berlin, Germany; Charité Universitätsmedizin Berlin, Klinik für Rheumatologie und Klinische Immunologie, Charitéplatz 1, 10117 Berlin, Germany; Charité Universitätsmedizin Berlin, Institut für Experimentelle Endokrinologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Thilo Samson Chillon
- Charité Universitätsmedizin Berlin, Institut für Experimentelle Endokrinologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Petra Seemann
- selenOmed GmbH, Yorckstraße 71, 10965 Berlin, Germany
| | - Sarah Ohrndorf
- Charité Universitätsmedizin Berlin, Klinik für Rheumatologie und Klinische Immunologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Ragna Ochwadt
- MVZ für Laboratoriumsmedizin, Genetik und Mikrobiologie Hamburg GmbH, Haferweg 40, 22769 Hamburg, Germany
| | - Wolfgang Becker
- MVZ MediVision Altona GmbH, Lornsenstraße 6, 22767 Hamburg, Germany
| | - Lutz Schomburg
- Charité Universitätsmedizin Berlin, Institut für Experimentelle Endokrinologie, Charitéplatz 1, 10117 Berlin, Germany.
| | - Paula Hoff
- MVZ Endokrinologikum Berlin am Gendarmenmarkt, Friedrichstr. 76, 10117 Berlin, Germany; Charité Universitätsmedizin Berlin, Klinik für Rheumatologie und Klinische Immunologie, Charitéplatz 1, 10117 Berlin, Germany.
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Demircan K, Chillon TS, Bang J, Gladyshev VN, Schomburg L. Selenium, diabetes, and their intricate sex-specific relationship. Trends Endocrinol Metab 2024; 35:781-792. [PMID: 38599899 DOI: 10.1016/j.tem.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/15/2024] [Accepted: 03/15/2024] [Indexed: 04/12/2024]
Abstract
Selenium (Se) is an essential trace element, which is inserted as selenocysteine (Sec) into selenoproteins during biosynthesis, orchestrating their expression and activity. Se is associated with both beneficial and detrimental health effects; deficient supply or uncontrolled supplementation raises concerns. In particular, Se was associated with an increased incidence of type 2 diabetes (T2D) in a secondary analysis of a randomized controlled trial (RCT). In this review, we discuss the intricate relationship between Se and diabetes and the limitations of the available clinical and experimental studies. Recent evidence points to sexual dimorphism and an association of Se deficiency with gestational diabetes mellitus (GDM). We highlight the emerging evidence linking high Se status with improved prognosis in patients with T2D and lower risk of macrovascular complications.
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Affiliation(s)
- Kamil Demircan
- Institute for Experimental Endocrinology, Max Rubner Center, Charité University Berlin, Germany
| | - Thilo Samson Chillon
- Institute for Experimental Endocrinology, Max Rubner Center, Charité University Berlin, Germany
| | - Jeyoung Bang
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Vadim N Gladyshev
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Max Rubner Center, Charité University Berlin, Germany.
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Alehagen U, Aaseth J, Schomburg L, Larsson A, Opstad T, Alexander J. Selenoprotein P increases upon selenium and coenzyme Q 10 supplementation and is associated with telomere length, quality of life and reduced inflammation and mortality. Free Radic Biol Med 2024; 222:403-413. [PMID: 38960007 DOI: 10.1016/j.freeradbiomed.2024.06.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/21/2024] [Accepted: 06/29/2024] [Indexed: 07/05/2024]
Abstract
BACKGROUND Selenoprotein P (SELENOP) transports selenium to extrahepatic tissues and is a biomarker of selenium status. Low soil selenium leads to low dietary selenium intake. A consequence is an increased risk of cardiovascular disease. OBJECTIVE To investigate clinical aspects associated with SELENOP deficiency, including biomarkers of inflammation, quality of life, and mortality within 12 years, and the effect of dietary selenium and coenzyme Q10 supplementation on SELENOP. METHODS SELENOP was determined at inclusion and after four years of supplementation in 403 elderly community-living participants low in selenium receiving selenium yeast (200 μg/day) and coenzyme Q10 (200 mg/day), or placebo. Pre-intervention, the average serum selenium level was 67 μg/L. T-tests, repeated measures of variance, Cox proportional regressions analyses, Kaplan-Meier graphs and ANCOVA analyses were applied. Associations with biomarkers of inflammation, telomere length, quality of life and mortality were investigated. Benchmark modelling was used to determine the serum selenium concentration at which the saturation levels of SELENOP and GPx3 was achieved. Comparison with GPx3 and serum selenium to identify increased mortality risk was performed, and the effect of supplementation on SELENOP levels were evaluated. RESULTS Inverse associations were observed between the level of SELENOP at inclusion and biomarkers for inflammation. At follow-up, shorter telomere lengths were seen in those with low levels of SELENOP at inclusion, whereas high levels of SELENOP were associated with better quality of life and decreased mortality. SELENOP had increased prognostic power compared to GPx3 and selenium. Saturation of SELENOP was achieved at a serum selenium level of 146 μg/L, and for GPx3 at 99 μg/L. Supplementation induced higher levels of SELENOP. CONCLUSION Significant associations between SELENOP and inflammation, length of telomeres, quality of life, and mortality were observed. Thus, selenium supplementation improved SELENOP expression, thereby facilitating systemic selenium bioavailability and resulting in the observed positive health effects.
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Affiliation(s)
- U Alehagen
- Division of Cardiovascular Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, SE-581 85, Linköping, Sweden.
| | - J Aaseth
- Research Department, Innlandet Hospital Trust, N-2381, Brumunddal, Norway.
| | - L Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, D-10115, Berlin, Germany.
| | - A Larsson
- Department of Medical Sciences, Uppsala University, SE-751 85, Uppsala, Sweden.
| | - Trine Opstad
- Oslo Center for Clinical Heart Research - Laboratory, Department of Cardiology, Oslo University Hospital Ullevål, Oslo, Norway; Faculty of Medicine, University of Oslo, Norway.
| | - J Alexander
- Norwegian Institute of Public Health, N-0403, Oslo, Norway.
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Yuan S, Zhang Y, Dong PY, Chen Yan YM, Liu J, Zhang BQ, Chen MM, Zhang SE, Zhang XF. A comprehensive review on potential role of selenium, selenoproteins and selenium nanoparticles in male fertility. Heliyon 2024; 10:e34975. [PMID: 39144956 PMCID: PMC11320318 DOI: 10.1016/j.heliyon.2024.e34975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 07/17/2024] [Accepted: 07/19/2024] [Indexed: 08/16/2024] Open
Abstract
Selenium (Se), a component of selenoproteins and selenocompounds in the human body, is crucial for the development of male reproductive organs, DNA synthesis, thyroid hormone, metabolism, and defence against infections and oxidative damage. In the testis, it must exceed a desirable level since either a shortage or an overabundance causes aberrant growth. The antioxidant properties of selenium are essential for preserving human reproductive health. Selenoproteins, which have important structural and enzymatic properties, control the biological activities of Se primarily. These proteins specifically have a role in metabolism and a variety of cellular processes, such as the control of selenium transport, thyroid hormone metabolism, immunity, and redox balance. Selenium nanoparticles (SeNPs) are less hazardous than selenium-based inorganic and organic materials. Upon being functionalized with active targeting ligands, they are both biocompatible and capable of efficiently delivering combinations of payloads to particular cells. In this review, we discuss briefly the chemistry, structure and functions of selenium and milestones of selenium and selenoproteins. Next we discuss the various factors influences male infertility, biological functions of selenium and selenoproteins, and role of selenium and selenoproteins in spermatogenesis and male fertility. Furthermore, we discuss the molecular mechanism of selenium transport and protective effects of selenium on oxidative stress, apoptosis and inflammation. We also highlight critical contribution of selenium nanoparticles on male fertility and spermatogenesis. Finally ends with conclusion and future perspectives.
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Affiliation(s)
- Shuai Yuan
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266109, China
| | - Ye Zhang
- Advanced Medical Research Institute, Shandong University, Jinan, Shandong, 250014, China
| | - Pei-Yu Dong
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yu-Mei Chen Yan
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jing Liu
- Analytical & Testing Center of Qingdao Agricultural University, Qingdao, 266100, China
| | - Bing-Qiang Zhang
- Qingdao Restore Biotechnology Co., Ltd., Qingdao, 266111, China
- Key Laboratory of Cancer and Immune Cells of Qingdao, Qingdao, 266111, China
| | - Meng-Meng Chen
- Qingdao Restore Biotechnology Co., Ltd., Qingdao, 266111, China
- Key Laboratory of Cancer and Immune Cells of Qingdao, Qingdao, 266111, China
| | - Shu-Er Zhang
- Animal Husbandry General Station of Shandong Province, Jinan, 250010, China
| | - Xi-Feng Zhang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266109, China
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Demircan K, Chillon TS, Jensen RC, Jensen TK, Sun Q, Bonnema SJ, Glintborg D, Bilenberg N, Andersen MS, Schomburg L. Maternal selenium deficiency during pregnancy in association with autism and ADHD traits in children: The Odense Child Cohort. Free Radic Biol Med 2024; 220:324-332. [PMID: 38704054 DOI: 10.1016/j.freeradbiomed.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/24/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
BACKGROUND Selenoproteins regulate pathways controlling neurodevelopment, e.g., redox signaling and thyroid hormone metabolism. However, studies investigating maternal selenium in relation to child neurodevelopmental disorders are scarce. METHODS 719 mother-child pairs from the prospective population-based Odense Child Cohort study in Denmark were included. Three selenium biomarkers, i.e. concentrations of serum selenium, selenoprotein P (SELENOP), and activity of glutathione peroxidase 3 (GPX3), along with serum copper, zinc and iron were measured in early third trimester (at 28.9+/-0.8 weeks of pregnancy). ADHD and ASD traits in children were assessed systematically using the established Child Behaviour Checklist at 5 years of age, based on a Danish reference cohort with cut-off at 90th percentile. Multivariable regression models adjusted for biologically relevant confounders were applied. RESULTS 155 of 719 (21.6 %) children had ASD traits and 59 of 719 (8.2 %) children had traits of ADHD at 5 years of age. In crude and adjusted models, all three selenium biomarkers associated inversely with ADHD traits. For ADHD, fully adjusted OR for 10 μg/L increment in selenium was 0.76 (95 % CI 0.60, 0.94), for one mg/L increment in SELENOP was 0.73 (0.56, 0.95), and for 10 U/L increment in GPx3 was 0.93 (0.87,1.00). Maternal total selenium was inversely associated with child ASD traits, OR per 10 μg/L increment was 0.85 (0.74, 0,98). SELENOP and GPx3 were not associated with ASD traits. The associations were specific to selenium, as other trace elements such as copper, zinc, or iron were not associated with the outcomes. CONCLUSIONS The results provide coherent evidence for selenium deficiency as a risk factor for ADHD and ASD traits in an environment with borderline supply, the causality of which should be elucidated in a randomized controlled trial.
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Affiliation(s)
- Kamil Demircan
- Institute for Experimental Endocrinology, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Thilo Samson Chillon
- Institute for Experimental Endocrinology, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Richard Christian Jensen
- Department of Endocrinology, Odense University Hospital, Kløvervænget 6, 5000, Odense C, Denmark; University of Southern Denmark, Odense, Denmark; Department of Clinical Pharmacology, Pharmacy and Environmental Medicine, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
| | - Tina Kold Jensen
- Department of Clinical Pharmacology, Pharmacy and Environmental Medicine, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark; Odense Child Cohort, Hans Christian Andersen Children's Hospital, Odense University Hospital, Kløvervænget 23C, 5000, Odense C, Denmark; OPEN Patient Data Explorative Network (OPEN), SDU, Denmark
| | - Qian Sun
- Institute for Experimental Endocrinology, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Steen Joop Bonnema
- Department of Endocrinology, Odense University Hospital, Kløvervænget 6, 5000, Odense C, Denmark; University of Southern Denmark, Odense, Denmark
| | - Dorte Glintborg
- Department of Endocrinology, Odense University Hospital, Kløvervænget 6, 5000, Odense C, Denmark; University of Southern Denmark, Odense, Denmark
| | - Niels Bilenberg
- Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark; Department of Child and Adolescent Mental Health, Mental Health Services in the Region of Southern Denmark, Odense, Denmark
| | - Marianne Skovsager Andersen
- Department of Endocrinology, Odense University Hospital, Kløvervænget 6, 5000, Odense C, Denmark; University of Southern Denmark, Odense, Denmark.
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité-Universitätsmedizin Berlin, Berlin, Germany.
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Perri G, Mathers JC, Martin-Ruiz C, Parker C, Walsh JS, Eastell R, Demircan K, Chillon TS, Schomburg L, Robinson L, Hill TR. Selenium status and its determinants in very old adults: insights from the Newcastle 85+ Study. Br J Nutr 2024; 131:901-910. [PMID: 37877251 PMCID: PMC10864996 DOI: 10.1017/s0007114523002398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/08/2023] [Accepted: 10/19/2023] [Indexed: 10/26/2023]
Abstract
There is a dearth of data on Se status in very old adults. The aims of this study were to assess Se status and its determinants in 85-year-olds living in the Northeast of England by measuring serum Se and selenoprotein P (SELENOP) concentrations and glutathione peroxidase 3 (GPx3) activity. A secondary aim was to examine the interrelationships between each of the biomarkers. In total, 757 participants (463 women, 293 men) from the Newcastle 85+ Study were included. Biomarker concentrations were compared with selected cut-offs (serum Se: suboptimal 70 µg/l and deficient 45 µg/l; SELENOP: suboptimal 4·5 mg/l and deficient 2·6 mg/l). Determinants were assessed using linear regressions, and interrelationships were assessed using restricted cubic splines. Median (inter-quartile range) concentrations of serum Se, SELENOP and of GPx3 activity were 53·6 (23·6) µg/l, 2·9 (1·9) mg/l and 142·1 (50·7) U/l, respectively. Eighty-two percentage and 83 % of participants had suboptimal serum Se (< 70 µg/l) and SELENOP (< 4·5 mg/l), and 31 % and 40 % of participants had deficient serum Se (< 45 µg/l) and SELENOP (< 2·6 mg/l), respectively. Protein intake was a significant determinant of Se status. Additional determinants of serum Se were sex, waist:hip ratio, self-rated health and disease, while sex, BMI and physical activity were determinants of GPx3 activity. There was a linear association between serum Se and SELENOP, and nonlinear associations between serum Se and GPx3 activity and between SELENOP and GPx3 activity. These findings indicate that most participants had suboptimal Se status to saturate circulating SELENOP.
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Affiliation(s)
- Giorgia Perri
- Human Nutrition and Exercise Research Centre, Centre for Healthier Lives, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
- MRC-Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
| | - John C. Mathers
- Human Nutrition and Exercise Research Centre, Centre for Healthier Lives, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
- MRC-Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
| | - Carmen Martin-Ruiz
- BioScreening Core Facility, Campus for Ageing and Vitality, Newcastle University, Newcastle upon TyneNE4 5PL, UK
| | - Craig Parker
- BioScreening Core Facility, Campus for Ageing and Vitality, Newcastle University, Newcastle upon TyneNE4 5PL, UK
| | - Jennifer S. Walsh
- MRC-Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
- Department of Oncology and Metabolism, University of Sheffield, SheffieldS5 7AU, UK
| | - Richard Eastell
- MRC-Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
- Department of Oncology and Metabolism, University of Sheffield, SheffieldS5 7AU, UK
| | - Kamil Demircan
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Berlin10115, Germany
| | - Thilo S. Chillon
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Berlin10115, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Berlin10115, Germany
| | - Louise Robinson
- Human Nutrition and Exercise Research Centre, Centre for Healthier Lives, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
| | - Tom R. Hill
- Human Nutrition and Exercise Research Centre, Centre for Healthier Lives, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
- MRC-Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Medical Sciences, Newcastle University, Newcastle upon TyneNE2 4HH, UK
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Dogaru CB, Muscurel C, Duță C, Stoian I. "Alphabet" Selenoproteins: Their Characteristics and Physiological Roles. Int J Mol Sci 2023; 24:15992. [PMID: 37958974 PMCID: PMC10650576 DOI: 10.3390/ijms242115992] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/29/2023] [Accepted: 11/04/2023] [Indexed: 11/15/2023] Open
Abstract
Selenium (Se) is a metalloid that is recognized as one of the vital trace elements in our body and plays multiple biological roles, largely mediated by proteins containing selenium-selenoproteins. Selenoproteins mainly have oxidoreductase functions but are also involved in many different molecular signaling pathways, physiological roles, and complex pathogenic processes (including, for example, teratogenesis, neurodegenerative, immuno-inflammatory, and obesity development). All of the selenoproteins contain one selenocysteine (Sec) residue, with only one notable exception, the selenoprotein P (SELENOP), which has 10 Sec residues. Although these mechanisms have been studied intensely and in detail, the characteristics and functions of many selenoproteins remain unknown. This review is dedicated to the recent data describing the identity and the functions of several selenoproteins that are less known than glutathione peroxidases (Gpxs), iodothyronine deiodinases (DIO), thioredoxin reductases (TRxRs), and methionine sulfoxide reductases (Msrs) and which are named after alphabetical letters (i.e., F, H, I, K, M, N, O, P, R, S, T, V, W). These "alphabet" selenoproteins are involved in a wide range of physiological and pathogenetic processes such as antioxidant defense, anti-inflammation, anti-apoptosis, regulation of immune response, regulation of oxidative stress, endoplasmic reticulum (ER) stress, immune and inflammatory response, and toxin antagonism. In selenium deficiency, the "alphabet" selenoproteins are affected hierarchically, both with respect to the particular selenoprotein and the tissue of expression, as the brain or endocrine glands are hardly affected by Se deficiency due to their equipment with LRP2 or LRP8.
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Affiliation(s)
| | | | - Carmen Duță
- Department of Biochemistry, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania (I.S.)
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Sun Q, Oltra E, Dijck-Brouwer DAJ, Chillon TS, Seemann P, Asaad S, Demircan K, Espejo-Oltra JA, Sánchez-Fito T, Martín-Martínez E, Minich WB, Muskiet FAJ, Schomburg L. Autoantibodies to selenoprotein P in chronic fatigue syndrome suggest selenium transport impairment and acquired resistance to thyroid hormone. Redox Biol 2023; 65:102796. [PMID: 37423160 PMCID: PMC10338150 DOI: 10.1016/j.redox.2023.102796] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 06/22/2023] [Indexed: 07/11/2023] Open
Abstract
Chronic Fatigue Syndrome (CFS) presents with symptoms of hypothyroidism, including mental and physical fatigue, poor sleep, depression, and anxiety. However, thyroid hormone (TH) profiles of elevated thyrotropin and low thyroxine (T4) are not consistently observed. Recently, autoantibodies to the Se transporter SELENOP (SELENOP-aAb) have been identified in Hashimoto's thyroiditis and shown to impair selenoprotein expression. We hypothesized that SELENOP-aAb are prevalent in CFS, and associate with reduced selenoprotein expression and impaired TH deiodination. Se status and SELENOP-aAb prevalence was compared by combining European CFS patients (n = 167) and healthy controls (n = 545) from different sources. The biomarkers total Se, glutathione peroxidase (GPx3) and SELENOP showed linear correlations across the samples without reaching saturation, indicative of Se deficiency. SELENOP-aAb prevalence was 9.6-15.6% in CFS versus 0.9-2.0% in controls, depending on cut-off for positivity. The linear correlation between Se and GPx3 activity was absent in SELENOP-aAb positive patients, suggesting impaired Se supply of kidney. A subgroup of paired control (n = 119) and CSF (n = 111) patients had been characterized for TH and biochemical parameters before. Within this subgroup, SELENOP-aAb positive patients displayed particularly low deiodinase activity (SPINA-GD index), free T3 levels, total T3 to total T4 (TT3/TT4) and free T3 to free T4 (FT3/FT4) ratios. In 24 h urine, iodine concentrations were significantly lower in SELENOP-aAb positive than in SELENOP-aAb negative patients or controls (median (IQR); 43.2 (16.0) vs. 58.9 (45.2) vs. 89.0 (54.9) μg/L). The data indicate that SELENOP-aAb associate with low deiodination rate and reduced activation of TH to active T3. We conclude that a subset of CFS patients express SELENOP-aAb that disturb Se transport and reduce selenoprotein expression in target tissues. Hereby, TH activation decreases as an acquired condition not reflected by thyrotropin and T4 in blood. This hypothesis opens new diagnostic and therapeutic options for SELENOP-aAb positive CFS, but requires clinical evidence from intervention trials.
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Affiliation(s)
- Qian Sun
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany; selenOmed GmbH, Berlin, Germany
| | - Elisa Oltra
- Department of Pathology, School of Health Sciences, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain
| | - D A Janneke Dijck-Brouwer
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ, Groningen, the Netherlands
| | - Thilo Samson Chillon
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | | | - Sabrina Asaad
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Kamil Demircan
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - José Andrés Espejo-Oltra
- Department of Pathology, School of Health Sciences, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain
| | - Teresa Sánchez-Fito
- Department of Pathology, School of Health Sciences, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain
| | | | - Waldemar B Minich
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Frits A J Muskiet
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ, Groningen, the Netherlands
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany.
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Demircan K, Hybsier S, Chillon TS, Vetter VM, Rijntjes E, Demuth I, Schomburg L. Sex-specific associations of serum selenium and selenoprotein P with type 2 diabetes mellitus and hypertension in the Berlin Aging Study II. Redox Biol 2023; 65:102823. [PMID: 37516012 PMCID: PMC10405093 DOI: 10.1016/j.redox.2023.102823] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 07/31/2023] Open
Abstract
BACKGROUND Selenium is essential for expression and proper function of a set of redox active selenoproteins implicated in aging-relevant diseases, e.g. type 2 diabetes mellitus (T2D) and hypertension. However, data in cohorts of older adults, particularly with respect to different Se biomarkers and sex-specific analyses are sparse. OBJECTIVE To assess associations of serum Se and selenoprotein P (SELENOP) concentrations with T2D and hypertension in a cohort of older females and males. METHODS This study included 1500 participants from the Berlin Aging Study II. Diagnosis of T2D was made in case of antidiabetic medication, self-reported T2D, or laboratory parameters. Diagnosis of hypertension was based on self-report, blood pressure measurement, or anti-hypertensive medication. Se was measured by spectroscopy, and SELENOP by ELISA. Multiple adjusted regression models quantified dose-dependent associations. RESULTS Participants had a median(IQR) age of 68 (65,71) years, and 767 (51%) were women. 191 (13%) participants had T2D and 1126 (75%) had hypertension. Se and SELENOP correlated significantly (r = 0.59, p < 0.001), and were elevated in those with self-reported Se supplementation. Serum Se and SELENOP were not associated with T2D in the whole cohort. In men, SELENOP was positively associated with T2D, OR (95%CI) for one mg/L increase in SELENOP was 1.22 (1.00,1.48). Se was non-linearly associated with hypertension, comparing to the lowest quartile (Q1), and participants with higher Se levels (Q3) had a lower OR (95%CI) of 0.66 (0.45,0.96), which was specific for men. SELENOP positively associated with hypertension, and OR (95%CI) per one mg/L increase was 1.15 (1.01,1.32). CONCLUSIONS The data suggest a sex-specific interrelationship of Se status with T2D and hypertension, with apparent biomarker-specific associations.
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Affiliation(s)
- Kamil Demircan
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, D-10115, Berlin, Germany
| | - Sandra Hybsier
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, D-10115, Berlin, Germany
| | - Thilo Samson Chillon
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, D-10115, Berlin, Germany
| | - Valentin Max Vetter
- Department of Endocrinology and Metabolic Diseases (including Division of Lipid Metabolism), Biology of Aging Working Group, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, And Berlin Institute of Health (BIH), Berlin, Germany
| | - Eddy Rijntjes
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, D-10115, Berlin, Germany
| | - Ilja Demuth
- Department of Endocrinology and Metabolic Diseases (including Division of Lipid Metabolism), Biology of Aging Working Group, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, And Berlin Institute of Health (BIH), Berlin, Germany.
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, D-10115, Berlin, Germany.
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10
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Mizuno A, Toyama T, Ichikawa A, Sakai N, Yoshioka Y, Nishito Y, Toga R, Amesaka H, Kaneko T, Arisawa K, Tsutsumi R, Mita Y, Tanaka SI, Noguchi N, Saito Y. An efficient selenium transport pathway of selenoprotein P utilizing a high-affinity ApoER2 receptor variant and being independent of selenocysteine lyase. J Biol Chem 2023; 299:105009. [PMID: 37406814 PMCID: PMC10407282 DOI: 10.1016/j.jbc.2023.105009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 07/07/2023] Open
Abstract
Selenoprotein P (SeP, encoded by the SELENOP gene) is a plasma protein that contains selenium in the form of selenocysteine residues (Sec, a cysteine analog containing selenium instead of sulfur). SeP functions for the transport of selenium to specific tissues in a receptor-dependent manner. Apolipoprotein E receptor 2 (ApoER2) has been identified as a SeP receptor. However, diverse variants of ApoER2 have been reported, and the details of its tissue specificity and the molecular mechanism of its efficiency remain unclear. In the present study, we found that human T lymphoma Jurkat cells have a high ability to utilize selenium via SeP, while this ability was low in human rhabdomyosarcoma cells. We identified an ApoER2 variant with a high affinity for SeP in Jurkat cells. This variant had a dissociation constant value of 0.67 nM and a highly glycosylated O-linked sugar domain. Moreover, the acidification of intracellular vesicles was necessary for selenium transport via SeP in both cell types. In rhabdomyosarcoma cells, SeP underwent proteolytic degradation in lysosomes and transported selenium in a Sec lyase-dependent manner. However, in Jurkat cells, SeP transported selenium in Sec lyase-independent manner. These findings indicate a preferential selenium transport pathway involving SeP and high-affinity ApoER2 in a Sec lyase-independent manner. Herein, we provide a novel dynamic transport pathway for selenium via SeP.
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Affiliation(s)
- Ayako Mizuno
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Takashi Toyama
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Atsuya Ichikawa
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Naoko Sakai
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Yuya Yoshioka
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Yukina Nishito
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Renya Toga
- Laboratory of Biostructural Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Hiroshi Amesaka
- Laboratory of Biostructural Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Takayuki Kaneko
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Kotoko Arisawa
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Ryouhei Tsutsumi
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yuichiro Mita
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Shun-Ichi Tanaka
- Laboratory of Biostructural Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan; Department of Biotechnology, College of Life Sciences, Ritsumeikan University, Shiga, Japan
| | - Noriko Noguchi
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
| | - Yoshiro Saito
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan; The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan.
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11
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Schwarz M, Meyer CE, Löser A, Lossow K, Hackler J, Ott C, Jäger S, Mohr I, Eklund EA, Patel AAH, Gul N, Alvarez S, Altinonder I, Wiel C, Maares M, Haase H, Härtlova A, Grune T, Schulze MB, Schwerdtle T, Merle U, Zischka H, Sayin VI, Schomburg L, Kipp AP. Excessive copper impairs intrahepatocyte trafficking and secretion of selenoprotein P. Nat Commun 2023; 14:3479. [PMID: 37311819 DOI: 10.1038/s41467-023-39245-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 06/06/2023] [Indexed: 06/15/2023] Open
Abstract
Selenium homeostasis depends on hepatic biosynthesis of selenoprotein P (SELENOP) and SELENOP-mediated transport from the liver to e.g. the brain. In addition, the liver maintains copper homeostasis. Selenium and copper metabolism are inversely regulated, as increasing copper and decreasing selenium levels are observed in blood during aging and inflammation. Here we show that copper treatment increased intracellular selenium and SELENOP in hepatocytes and decreased extracellular SELENOP levels. Hepatic accumulation of copper is a characteristic of Wilson's disease. Accordingly, SELENOP levels were low in serum of Wilson's disease patients and Wilson's rats. Mechanistically, drugs targeting protein transport in the Golgi complex mimicked some of the effects observed, indicating a disrupting effect of excessive copper on intracellular SELENOP transport resulting in its accumulation in the late Golgi. Our data suggest that hepatic copper levels determine SELENOP release from the liver and may affect selenium transport to peripheral organs such as the brain.
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Affiliation(s)
- Maria Schwarz
- Department of Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743, Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Caroline E Meyer
- Department of Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743, Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Alina Löser
- Department of Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743, Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Kristina Lossow
- Department of Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743, Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
| | - Julian Hackler
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Institute for Experimental Endocrinology, Charité - University Medical School Berlin, Hessische Straße 3-4, 10115, Berlin, Germany
| | - Christiane Ott
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbrücke, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - Susanne Jäger
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - Isabelle Mohr
- Department of Internal Medicine IV, University Hospital Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany
| | - Ella A Eklund
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Angana A H Patel
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Nadia Gul
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Samantha Alvarez
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Ilayda Altinonder
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Clotilde Wiel
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Maria Maares
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Food Chemistry and Toxicology, Technical University Berlin, Gustav-Meyer-Allee 25, 13355, Berlin, Germany
| | - Hajo Haase
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Food Chemistry and Toxicology, Technical University Berlin, Gustav-Meyer-Allee 25, 13355, Berlin, Germany
| | - Anetta Härtlova
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
- Institute of Biomedicine, Department of Microbiology and Immunology, University of Gothenburg, 41345, Gothenburg, Sweden
- The Institute of Medical Microbiology and Hygiene, University Medical Centre Freiburg, Freiburg, Germany
| | - Tilman Grune
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbrücke, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - Matthias B Schulze
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - Tanja Schwerdtle
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str. 8-10, 10589, Berlin, Germany
| | - Uta Merle
- Department of Internal Medicine IV, University Hospital Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany
| | - Hans Zischka
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, School of Medicine, Biedersteinerstraße 29, 80802, Munich, Germany
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764, Neuherberg, Germany
| | - Volkan I Sayin
- Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, Blå stråket 5, 41345, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Lutz Schomburg
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany
- Institute for Experimental Endocrinology, Charité - University Medical School Berlin, Hessische Straße 3-4, 10115, Berlin, Germany
| | - Anna P Kipp
- Department of Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743, Jena, Germany.
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena-Wuppertal, Germany.
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12
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Zhang F, Li X, Wei Y. Selenium and Selenoproteins in Health. Biomolecules 2023; 13:biom13050799. [PMID: 37238669 DOI: 10.3390/biom13050799] [Citation(s) in RCA: 45] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Selenium is a trace mineral that is essential for health. After being obtained from food and taken up by the liver, selenium performs various physiological functions in the body in the form of selenoproteins, which are best known for their redox activity and anti-inflammatory properties. Selenium stimulates the activation of immune cells and is important for the activation of the immune system. Selenium is also essential for the maintenance of brain function. Selenium supplements can regulate lipid metabolism, cell apoptosis, and autophagy, and have displayed significant alleviating effects in most cardiovascular diseases. However, the effect of increased selenium intake on the risk of cancer remains unclear. Elevated serum selenium levels are associated with an increased risk of type 2 diabetes, and this relationship is complex and nonlinear. Selenium supplementation seems beneficial to some extent; however, existing studies have not fully explained the influence of selenium on various diseases. Further, more intervention trials are needed to verify the beneficial or harmful effects of selenium supplementation in various diseases.
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Affiliation(s)
- Fan Zhang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xuelian Li
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yumiao Wei
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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13
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Raschke S, Ebert F, Kipp AP, Kopp JF, Schwerdtle T. Selenium homeostasis in human brain cells: Effects of copper (II) and Se species. J Trace Elem Med Biol 2023; 78:127149. [PMID: 36948045 DOI: 10.1016/j.jtemb.2023.127149] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/19/2023] [Accepted: 03/02/2023] [Indexed: 03/14/2023]
Abstract
BACKGROUND Both essential trace elements selenium (Se) and copper (Cu) play an important role in maintaining brain function. Homeostasis of Cu, which is tightly regulated under physiological conditions, seems to be disturbed in Alzheimer´s (AD) and Parkinson´s disease (PD) patients. Excess Cu promotes the formation of oxidative stress, which is thought to be a major cause for development and progression of neurological diseases (NDs). Most selenoproteins exhibit antioxidative properties and may counteract oxidative stress. However, expression of selenoproteins is altered under conditions of Se deficiency. Serum Se levels are decreased in AD and PD patients suggesting Se as an important factor in the development and progression of NDs. The aim of this study was to elucidate the interactions between Cu and Se in human brain cells particularly with respect to Se homeostasis. METHODS Firstly, modulation of Se status by selenite or SeMet were assessed in human astrocytes and human differentiated neurons. Therefore, cellular total Se content, intra- and extracellular selenoprotein P (SELENOP) content, and glutathione peroxidase (GPX) activity were quantified. Secondly, to investigate the impact of Cu on these markers, cells were exposed to copper(II)sulphate (CuSO4) for 48 h. In addition, putative protective effects of Se on Cu-induced toxicity, as measured by cell viability, DNA damage, and neurodegeneration were investigated. RESULTS Modulation of cellular Se status was strongly dependent on Se species. In detail, SeMet increased total cellular Se and SELENOP content, whereas selenite led to increased GPX activity and SELENOP excretion. Cu treatment resulted in 133-fold higher cellular Cu concentration with a concomitant decrease in Se content. Additionally, SELENOP excretion was suppressed in both cell lines, while GPX activity was diminished only in astrocytes. These effects of Cu could be partially prevented by the addition of Se depending on the cell line and Se species used. While Cu-induced oxidative DNA damage could not be prevented by addition of Se regardless of chemical species, SeMet protected against neurite network degeneration triggered by Cu. CONCLUSION Cu appears to negatively affect Se status in astrocytes and neurons. Especially with regard to an altered homeostasis of those trace elements during aging, this interaction is of high physiological relevance. Increasing Cu concentrations associated with decreased selenoprotein expression or functionality might be a promoting factor for the development of NDs.
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Affiliation(s)
- Stefanie Raschke
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, Nuthetal 14558, Germany
| | - Franziska Ebert
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, Nuthetal 14558, Germany
| | - Anna Patricia Kipp
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, Jena 07743, Germany; TraceAge, DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558), Potsdam, Jena, Berlin, Germany
| | - Johannes Florian Kopp
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, Nuthetal 14558, Germany; TraceAge, DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558), Potsdam, Jena, Berlin, Germany
| | - Tanja Schwerdtle
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, Nuthetal 14558, Germany; TraceAge, DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558), Potsdam, Jena, Berlin, Germany; German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, Berlin 10589, Germany.
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14
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An KJ, Hanato AN, Hui KW, Pitts MW, Seale LA, Nicholson JL, Toh P, Kim JK, Berry MJ, Torres DJ. Selenium Protects Mouse Hypothalamic Cells from Glucocorticoid-Induced Endoplasmic Reticulum Stress Vulnerability and Insulin Signaling Impairment. Antioxidants (Basel) 2023; 12:526. [PMID: 36830084 PMCID: PMC9952756 DOI: 10.3390/antiox12020526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
The use of glucocorticoid medications is known to cause metabolic side effects such as overeating, excess weight gain, and insulin resistance. The hypothalamus, a central regulator of feeding behavior and energy expenditure, is highly responsive to glucocorticoids, and it has been proposed that it plays a role in glucocorticoid-induced metabolic defects. Glucocorticoids can alter the expression and activity of antioxidant enzymes and promote the accumulation of reactive oxygen species. Recent evidence indicates that selenium can counter the effects of glucocorticoids, and selenium is critical for proper hypothalamic function. This study sought to determine whether selenium is capable of protecting hypothalamic cells from dysfunction caused by glucocorticoid exposure. We treated mHypoE-44 mouse hypothalamic cells with corticosterone to study the effects on cellular physiology and the involvement of selenium. We found that corticosterone administration rendered cells more vulnerable to endoplasmic reticulum stress and the subsequent impairment of insulin signaling. Supplementing the cell culture media with additional selenium alleviated endoplasmic reticulum stress and promoted insulin signaling. These findings implicate a protective role of selenium against chronic glucocorticoid-induced hypothalamic dysfunction.
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Affiliation(s)
- Katlyn J. An
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
| | - Ashley N. Hanato
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
| | - Katherine W. Hui
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
| | - Matthew W. Pitts
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
| | - Lucia A. Seale
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawai‘i, Honolulu, HI 96822, USA
| | - Jessica L. Nicholson
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawai‘i, Honolulu, HI 96822, USA
| | - Pamela Toh
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawai‘i, Honolulu, HI 96822, USA
| | - Jun Kyoung Kim
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
| | - Marla J. Berry
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawai‘i, Honolulu, HI 96822, USA
| | - Daniel J. Torres
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai‘i, Honolulu, HI 96813, USA
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawai‘i, Honolulu, HI 96822, USA
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15
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Behl S, Mehta S, Pandey MK. The role of selenoproteins in neurodevelopment and neurological function: Implications in autism spectrum disorder. Front Mol Neurosci 2023; 16:1130922. [PMID: 36969558 PMCID: PMC10034371 DOI: 10.3389/fnmol.2023.1130922] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 02/17/2023] [Indexed: 03/29/2023] Open
Abstract
Selenium and selenoproteins play a role in many biological functions, particularly in brain development and function. This review outlines the role of each class of selenoprotein in human brain function. Most selenoproteins play a large antioxidant role within the brain. Autism spectrum disorder (ASD) has been shown to correlate with increased oxidative stress, and the presumption of selenoproteins as key players in ASD etiology are discussed. Further, current literature surrounding selenium in ASD and selenium supplementation studies are reviewed. Finally, perspectives are given for future directions of selenoprotein research in ASD.
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Affiliation(s)
- Supriya Behl
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, United States
- Center for Childhood Cancer Research, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - Sunil Mehta
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, United States
| | - Mukesh K. Pandey
- Department of Radiology, Mayo Clinic, Rochester, MN, United States
- *Correspondence: Mukesh K. Pandey,
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Hackler J, Demircan K, Chillon TS, Sun Q, Geisler N, Schupp M, Renko K, Schomburg L. High throughput drug screening identifies resveratrol as suppressor of hepatic SELENOP expression. Redox Biol 2022; 59:102592. [PMID: 36586222 PMCID: PMC9816962 DOI: 10.1016/j.redox.2022.102592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 12/24/2022] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION Selenium (Se) is an essential trace element that exerts its effects mainly as the proteinogenic amino acid selenocysteine within a small set of selenoproteins. Among all family members, selenoprotein P (SELENOP) constitutes a particularly interesting protein as it serves as a biomarker and serum Se transporter from liver to privileged tissues. SELENOP expression is tightly regulated by dietary Se intake, inflammation, hypoxia and certain substances, but a systematic drug screening has hitherto not been performed. METHODS A compound library of 1861 FDA approved clinically relevant drugs was systematically screened for interfering effects on SELENOP expression in HepG2 cells using a validated ELISA method. Dilution experiments were conducted to characterize dose-responses. A most potent SELENOP inhibitor was further characterized by RNA-seq analysis to assess effect-associated biochemical pathways. RESULTS Applying a 2-fold change threshold, 236 modulators of SELENOP expression were identified. All initial hits were replicated as biological triplicates and analyzed for effects on cell viability. A set of 38 drugs suppressed SELENOP expression more than three-fold, among which were cancer drugs, immunosuppressants, anti-infectious drugs, nutritional supplements and others. Considering a 90% cell viability threshold, resveratrol, vidofludimus, and antimony potassium-tartrate were the most potent substances with suppressive effects on extracellular SELENOP concentrations. Resveratrol suppressed SELENOP levels dose-dependently in a concentration range from 0.8 μM to 50.0 μM, without affecting cell viability, along with strong effects on key genes controlling metabolic pathways and vesicle trafficking. CONCLUSION The results highlight an unexpected direct effect of the plant stilbenoid resveratrol, known for its antioxidative and health-promoting effects, on the central Se transport protein. The suppressive effects on SELENOP may increase liver Se levels and intracellular selenoprotein expression, thereby conferring additional protection to hepatocytes at the expense of systemic Se transport. Further physiological effects from this interaction require analyses in vivo and by clinical studies.
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Affiliation(s)
- Julian Hackler
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Kamil Demircan
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Thilo Samson Chillon
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Qian Sun
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Nino Geisler
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Michael Schupp
- Institute of Pharmacology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany
| | - Kostja Renko
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany,German Federal Institute for Risk Assessment, Department Experimental Toxicology and ZEBET, 12277, Berlin, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, 10115, Berlin, Germany.
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Schweizer U, Wirth EK, Klopstock T, Hölter SM, Becker L, Moskovitz J, Grune T, Fuchs H, Gailus-Durner V, Hrabe de Angelis M, Köhrle J, Schomburg L. Seizures, ataxia and parvalbumin-expressing interneurons respond to selenium supply in Selenop-deficient mice. Redox Biol 2022; 57:102490. [PMID: 36182809 PMCID: PMC9526222 DOI: 10.1016/j.redox.2022.102490] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 11/20/2022] Open
Abstract
Mice with constitutive disruption of the Selenop gene have been key to delineate the importance of selenoproteins in neurobiology. However, the phenotype of this mouse model is exquisitely dependent on selenium supply and timing of selenium supplementation. Combining biochemical, histological, and behavioral methods, we tested the hypothesis that parvalbumin-expressing interneurons in the primary somatosensory cortex and hippocampus depend on dietary selenium availability in Selenop-/- mice. Selenop-deficient mice kept on adequate selenium diet (0.15 mg/kg, i.e. the recommended dietary allowance, RDA) developed ataxia, tremor, and hyperexcitability between the age of 4-5 weeks. Video-electroencephalography demonstrated epileptic seizures in Selenop-/- mice fed the RDA diet, while Selenop± heterozygous mice behaved normally. Both neurological phenotypes, hyperexcitability/seizures and ataxia/dystonia were successfully prevented by selenium supplementation from birth or transgenic expression of human SELENOP under a hepatocyte-specific promoter. Selenium supplementation with 10 μM selenite in the drinking water on top of the RDA diet increased the activity of glutathione peroxidase in the brains of Selenop-/- mice to control levels. The effects of selenium supplementation on the neurological phenotypes were dose- and time-dependent. Selenium supplementation after weaning was apparently too late to prevent ataxia/dystonia, while selenium withdrawal from rescued Selenop-/- mice eventually resulted in ataxia. We conclude that SELENOP expression is essential for preserving interneuron survival under limiting Se supply, while SELENOP appears dispensable under sufficiently high Se status.
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Affiliation(s)
- Ulrich Schweizer
- Institut für Biochemie und Molekularbiologie, Uniklinikum Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.
| | - Eva K Wirth
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Thomas Klopstock
- Friedrich-Baur-Institute, Department of Neurology, University Hospital, Ludwig Maximilian University of Munich, Ziemssenstraße 1a, 80336, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE), Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Sabine M Hölter
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany; Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Lore Becker
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Jackob Moskovitz
- Department of Pharmacology & Toxicology, University of Kansas, Lawrence, KS, USA
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany; German Center for Cardiovascular Research (DZHK), 10117, Berlin, Germany; Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090, Vienna, Austria; German Center for Diabetes Research (DZD), Ingolstaedter Landstraße. 1, 85764, Neuherberg, Germany
| | - Helmut Fuchs
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Valerie Gailus-Durner
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Martin Hrabe de Angelis
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany; Experimental Genetics, TUM School of Life Sciences, Technische Universität München, Alte Akademie 8, 85354, Freising, Germany; German Center for Diabetes Research (DZD), Ingolstaedter Landstraße. 1, 85764, Neuherberg, Germany
| | - Josef Köhrle
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Lutz Schomburg
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
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Nunes LGA, Pitts MW, Hoffmann PR. Selenoprotein I (selenoi) as a critical enzyme in the central nervous system. Arch Biochem Biophys 2022; 729:109376. [PMID: 36007576 PMCID: PMC11166481 DOI: 10.1016/j.abb.2022.109376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/12/2022] [Accepted: 08/14/2022] [Indexed: 11/02/2022]
Abstract
Selenoprotein I (selenoi) is a unique selenocysteine (Sec)-containing protein widely expressed throughout the body. Selenoi belongs to two different protein families: the selenoproteins that are characterized by a redox reactive Sec residue and the lipid phosphotransferases that contain the highly conserved cytidine diphosphate (CDP)-alcohol phosphotransferase motif. Selenoi catalyzes the third reaction of the CDP-ethanolamine branch of the Kennedy pathway within the endoplasmic reticulum membrane. This is not a redox reaction and does not directly involve the Sec residue, making selenoi quite distinct among selenoproteins. Selenoi is also unique among lipid phosphotransferases as the only family member containing a Sec residue near its C-terminus that serves an unknown function. The reaction catalyzed by selenoi involves the transfer of the ethanolamine phosphate group from CDP-ethanolamine to one of two lipid donors, 1,2-diacylglycerol (DAG) or 1-alkyl-2-acylglycerol (AAG), to produce PE or plasmanyl PE, respectively. Plasmanyl PE is subsequently converted to plasmenyl PE by plasmanylethanolamine desaturase. Both PE and plasmenyl PE are critical phospholipids in the central nervous system (CNS), as demonstrated through clinical studies involving SELENOI mutations as well as studies in cell lines and mice. Deletion of SELENOI in mice is embryonic lethal, while loss-of-function mutations in the human SELENOI gene have been found in rare cases leading to a form of hereditary spastic paraplegia (HSP). HSP is an upper motor disease characterized by spasticity of the lower limbs, which is often manifested with other symptoms such as impaired vision/hearing, ataxia, cognitive/intellectual impairment, and seizures. This article will summarize the current understanding of selenoi as a metabolic enzyme and discuss its role in the CNS physiology and pathophysiology.
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Affiliation(s)
- Lance G A Nunes
- Department of Anatomy, Physiology and Biochemistry, Honolulu, HI, 96813, USA
| | - Matthew W Pitts
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, 96813, USA
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, 96813, USA.
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Schomburg L. Selenoprotein P - Selenium transport protein, enzyme and biomarker of selenium status. Free Radic Biol Med 2022; 191:150-163. [PMID: 36067902 DOI: 10.1016/j.freeradbiomed.2022.08.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 08/02/2022] [Accepted: 08/15/2022] [Indexed: 11/26/2022]
Abstract
The habitual intake of selenium (Se) varies strongly around the world, and many people are at risk of inadequate supply and health risks from Se deficiency. Within the human organism, efficient transport mechanisms ensure that organs with a high demand and relevance for reproduction and survival are preferentially supplied. To this end, selenoprotein P (SELENOP) is synthesized in the liver and mediates Se transport to essential tissues such as the endocrine glands and the brain, where the "SELENOP cycle" maintains a privileged Se status. Mouse models indicate that SELENOP is not essential for life, as supplemental Se supply was capable of preventing the development of severe symptoms. However, knockout mice died under limiting supply, arguing for an essential role of SELENOP in Se deficiency. Many clinical studies support this notion, pointing to close links between health risks and low SELENOP levels. Accordingly, circulating SELENOP concentrations serve as a functional biomarker of Se supply, at least until a saturated status is achieved and SELENOP levels reach a plateau. Upon toxic intake, a further increase in SELENOP is observed, i.e., SELENOP provides information about possible selenosis. The SELENOP transcripts predict an insertion of ten selenocysteine residues. However, the decoding is imperfect, and not all these positions are ultimately occupied by selenocysteine. In addition to the selenocysteine residues near the C-terminus, one selenocysteine resides central within an enzyme-like environment. SELENOP proved capable of catalyzing peroxide degradation in vitro and protecting e.g. LDL particles from oxidation. An enzymatic activity in the intact organism is unclear, but an increasing number of clinical studies provides evidence for a direct involvement of SELENOP-dependent Se transport as an important and modifiable risk factor of disease. This interaction is particularly strong for cardiovascular and critical disease including COVID-19, cancer at various sites and autoimmune thyroiditis. This review briefly highlights the links between the growing knowledge of Se in health and disease over the last 50 years and the specific advances that have been made in our understanding of the physiological and clinical contribution of SELENOP to the current picture.
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Affiliation(s)
- Lutz Schomburg
- Charité-Universitätsmedizin Berlin, Institute for Experimental Endocrinology, Cardiovascular-Metabolic-Renal (CMR)-Research Center, Hessische Straße 3-4, 10115 Berlin, Germany.
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Nicholson JL, Toh P, Alfulaij N, Berry MJ, Torres DJ. New insights on selenoproteins and neuronal function. Free Radic Biol Med 2022; 190:55-61. [PMID: 35948259 DOI: 10.1016/j.freeradbiomed.2022.07.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/17/2022] [Accepted: 07/26/2022] [Indexed: 10/15/2022]
Abstract
Fifty years have passed since the discovery of the first selenoprotein by Rotruck and colleagues. In that time, the essential nature of selenium has come to light including the dependence of the brain on selenium to function properly. Animal models have shown that a lack of certain selenoproteins in the brain is detrimental for neuronal health, sometimes leading to neurodegeneration. There is also potential for selenoprotein-mediated redox balance to impact neuronal activity, including neurotransmission. Important insights on these topics have been gained over the past several years. This review briefly summarizes the known roles of specific selenoproteins in the brain while highlighting recent advancements regarding selenoproteins in neuronal function. Hypothetical models of selenoprotein function and emerging topics in the field are also provided.
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Affiliation(s)
- Jessica L Nicholson
- Department of Cell & Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, 96813, USA; Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
| | - Pamela Toh
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
| | - Naghum Alfulaij
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
| | - Marla J Berry
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
| | - Daniel J Torres
- Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
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21
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Schweizer U, Fabiano M. Selenoproteins in brain development and function. Free Radic Biol Med 2022; 190:105-115. [PMID: 35961466 DOI: 10.1016/j.freeradbiomed.2022.07.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/21/2022] [Accepted: 07/26/2022] [Indexed: 01/18/2023]
Abstract
Expression of selenoproteins is widespread in neurons of the central nervous system. There is continuous evidence presented over decades that low levels of selenium or selenoproteins are linked to seizures and epilepsy indicating a failure of the inhibitory system. Many developmental processes in the brain depend on the thyroid hormone T3. T3 levels can be locally increased by the action of iodothyronine deiodinases on the prohormone T4. Since deiodinases are selenoproteins, it is expected that selenoprotein deficiency may affect development of the central nervous system. Studies in genetically modified mice or clinical observations of patients with rare diseases point to a role of selenoproteins in brain development and degeneration. In particular selenoprotein P is central to brain function by virtue of its selenium transport function into and within the brain. We summarize which selenoproteins are essential for the brain, which processes depend on selenoproteins, and what is known about genetic deficiencies of selenoproteins in humans. This review is not intended to cover the potential influence of selenium or selenoproteins on major neurodegenerative disorders in human.
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Affiliation(s)
- Ulrich Schweizer
- Institut für Biochemie und Molekularbiologie, Universitätsklinikum Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Nussallee 11, 53115, Bonn, Germany.
| | - Marietta Fabiano
- Institut für Biochemie und Molekularbiologie, Universitätsklinikum Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Nussallee 11, 53115, Bonn, Germany
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Kamoshita K, Tajima-Shirasaki N, Ishii KA, Shirasaki T, Takayama H, Abuduwaili H, Abuduyimiti T, Oo HK, Yao X, Li Q, Galicia-Medina CM, Kaneko S, Takamura T. Forkhead box protein O1 (FoxO1) knockdown accelerates the eicosapentaenoic acid (EPA)-mediated Selenop downregulation independently of sterol regulatory element-binding protein-1c (SREBP-1c) in H4IIEC3 hepatocytes. Endocr J 2022; 69:907-918. [PMID: 35321982 DOI: 10.1507/endocrj.ej21-0392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Selenoprotein P is upregulated in type 2 diabetes, causing insulin and exercise resistance. We have previously reported that eicosapentaenoic acid (EPA) negatively regulates Selenop expression by suppressing Srebf1 in H4IIEC3 hepatocytes. However, EPA downregulated Srebf1 long before downregulating Selenop. Here, we report additional novel mechanisms for the Selenop gene regulation by EPA. EPA upregulated Foxo1 mRNA expression, which was canceled with the ERK1/2 inhibitor, but not with the PKA inhibitor. Foxo1 knockdown by siRNA initiated early suppression of Selenop, but not Srebf1, by EPA. However, EPA did not affect the nuclear translocation of the FoxO1 protein. Neither ERK1/2 nor PKA inhibitor affected FoxO1 nuclear translocation. In summary, FoxO1 knockdown accelerates the EPA-mediated Selenop downregulation independent of SREBP-1c in hepatocytes. EPA upregulates Foxo1 mRNA via the ERK1/2 pathway without altering its protein and nuclear translocation. These findings suggest redundant and conflicting transcriptional networks in the lipid-induced redox regulation.
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Affiliation(s)
- Kyoko Kamoshita
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Natsumi Tajima-Shirasaki
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Kiyo-Aki Ishii
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
- Department of Integrative Medicine for Longevity, Graduate School of Medical Sciences, Kanazawa University, Kanazawa 920-8641, Japan
| | - Takayoshi Shirasaki
- Department of Advanced Medical Technology, Kanazawa University Graduate School of Health Medicine, Kanazawa 920-8641, Japan
| | - Hiroaki Takayama
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
- Life Sciences Division, Engineering and Technology Department, Kanazawa University, Kanazawa 920-8641, Japan
| | - Halimulati Abuduwaili
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Tuerdiguli Abuduyimiti
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Hein Ko Oo
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Xingyu Yao
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Qifang Li
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Cynthia M Galicia-Medina
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Shuichi Kaneko
- Department of System Biology, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
| | - Toshinari Takamura
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8641, Japan
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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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Talibova G, Ozturk Z, Parlak M, Kupesiz A. Elevated Selenoprotein P Levels in Thalassemia Major Patients. Arch Med Res 2022; 53:508-515. [PMID: 35840466 DOI: 10.1016/j.arcmed.2022.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/17/2022] [Accepted: 07/01/2022] [Indexed: 01/19/2023]
Abstract
INTRODUCTION Previous studies have measured selenium levels and glutathione peroxidase 3 (GPX3) activity in patients with thalassemia major (TM). However, Selenoprotein P (SEPP), which is responsible for the storage and transport of selenium, has not been studied in thalassemia patients. This study aims to correlate thyroid functions of TM patients with their SEPP and GPX3 levels. MATERIALS AND METHODS Eighty subjects (40 controls, 40 TM patients) were included in this study. GPX3 and SEPP concentrations were measured in all subjects using sandwich ELISA. Iron, ferritin, urinary iodine, thyroxine (T4), triiodothyronine (T3), thyrotropin (TSH), anti-thyroid peroxidase (anti-TPO), and anti-human thyroglobulin (anti-hTG) concentrations were also measured. RESULTS Mean SEPP concentration was higher in the TM group compared to the control group. A slight elevation in GPX3 levels was also observed in thalassemia patients, yet it was not statistically significant. In both TM patients and controls, ferritin was inversely correlated with free T4 concentration and GPX3 was inversely correlated with free T4 and T3 concentrations. There was also a negative correlation between SEPP and TSH concentrations in healthy subjects. CONCLUSION This is the first study, which has measured SEPP concentrations in thalassemia patients. SEPP levels were higher in TM patients compared to controls. Correlations between thyroid hormones and selenoproteins may indicate that selenium is necessary for thyroid function. Detailed studies are required to elaborate the role of SEPP in thyroid metabolism in thalassemia patients.
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Affiliation(s)
- Gunel Talibova
- Department of Pediatric Hematology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Zeynep Ozturk
- Department of Pediatric Hematology, Faculty of Medicine, Akdeniz University, Antalya, Turkey; Department of Medical Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Mesut Parlak
- Department of Pediatric Endocrinology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Alphan Kupesiz
- Department of Pediatric Hematology, Faculty of Medicine, Akdeniz University, Antalya, Turkey.
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Görlich CL, Sun Q, Roggenkamp V, Hackler J, Mehl S, Minich WB, Kaindl AM, Schomburg L. Selenium Status in Paediatric Patients with Neurodevelopmental Diseases. Nutrients 2022; 14:nu14122375. [PMID: 35745104 PMCID: PMC9227519 DOI: 10.3390/nu14122375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 02/04/2023] Open
Abstract
Neurodevelopmental diseases are often associated with other comorbidities, especially inflammatory processes. The disease may affect the trace element (TE) status, which in turn may affect disease severity and progression. Selenium (Se) is an essential TE required for the biosynthesis of selenoproteins including the transporter selenoprotein P (SELENOP) and extracellular glutathione peroxidase (GPX3). SELENOP deficiency in transgenic mice resulted in a Se status-dependent phenotype characterized by impaired growth and disturbed neuronal development, with epileptic seizures on a Se-deficient diet. Therefore, we hypothesized that Se and SELENOP deficiencies may be prevalent in paediatric patients with a neurodevelopmental disease. In an exploratory cross-sectional study, serum samples from children with neurodevelopmental diseases (n = 147) were analysed for total serum Se, copper (Cu), and zinc (Zn) concentrations as well as for the TE biomarkers SELENOP, ceruloplasmin (CP), and GPX3 activity. Children with epilepsy displayed elevated Cu and Zn concentrations but no dysregulation of serum Se status. Significantly reduced SELENOP concentrations were found in association with intellectual disability (mean ± SD (standard deviation); 3.9 ± 0.9 mg/L vs. 4.4 ± 1.2 mg/L, p = 0.015). A particularly low GPX3 activity (mean ± SD; 172.4 ± 36.5 vs. 192.6 ± 46.8 U/L, p = 0.012) was observed in phacomatoses. Autoantibodies to SELENOP, known to impair Se transport, were not detected in any of the children. In conclusion, there was no general association between Se deficiency and epilepsy in this observational analysis, which does not exclude its relevance to individual cases. Sufficiently high SELENOP concentrations seem to be of relevance to the support of normal mental development. Decreased GPX3 activity in phacomatoses may be relevant to the characteristic skin lesions and merits further analysis. Longitudinal studies are needed to determine whether the observed differences are relevant to disease progression and whether correcting a diagnosed TE deficiency may confer health benefits to affected children.
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Affiliation(s)
- Christian L. Görlich
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
- Center for Chronically Sick Children (SPZ), Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (V.R.); (A.M.K.)
| | - Qian Sun
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
| | - Viola Roggenkamp
- Center for Chronically Sick Children (SPZ), Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (V.R.); (A.M.K.)
| | - Julian Hackler
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
| | - Sebastian Mehl
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
| | - Waldemar B. Minich
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
| | - Angela M. Kaindl
- Center for Chronically Sick Children (SPZ), Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (V.R.); (A.M.K.)
- Department of Pediatric Neurology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany
- Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany; (C.L.G.); (Q.S.); (J.H.); (S.M.); (W.B.M.)
- Correspondence: ; Tel./Fax: +49-30-450-524-289
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Zhao X, Hogenkamp A, Li X, Chen H, Garssen J, Knippels LMJ. Role of selenium in IgE mediated soybean allergy development. Crit Rev Food Sci Nutr 2022; 63:7016-7024. [PMID: 35187987 DOI: 10.1080/10408398.2022.2039898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Food allergy is a pathological immune reaction triggered by normal innocuous dietary proteins. Soybean is widely used in many food products and has long been recognized as a source of high-quality proteins. However, soybean is listed as one of the 8 most significant food allergens. The prevalence of soybean allergy is increasing worldwide and impacts the quality of life of patients. Currently, the only strategy to manage food allergy relies on strict avoidance of the offending food. Nutritional supplementation is a new prevention strategy which is currently under evaluation. Selenium (Se), as one of the essential micronutrients for humans and animals, carries out biological effects through its incorporation into selenoproteins. The use of interventions with micronutrients, like Se, might be an interesting new approach. In this review we describe the involvement of Se in a variety of processes, including maintaining immune homeostasis, preventing free radical damage, and modulating the gut microbiome, all of which may contribute to in both the prevention and treatment of food allergy. Se interventions could be an interesting new approach for future treatment strategies to manage soybean allergy, and food allergy in general, and could help to improve the quality of life for food allergic patients.
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Affiliation(s)
- Xiaoli Zhao
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
- State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi, China
- School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
| | - Astrid Hogenkamp
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
| | - Xin Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
- Global Centre of Excellence Immunology, Danone/Nutricia Research, Utrecht, The Netherlands
| | - Leon M J Knippels
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
- Global Centre of Excellence Immunology, Danone/Nutricia Research, Utrecht, The Netherlands
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He Y, Liu Y, Tang J, Jia G, Liu G, Tian G, Chen X, Cai J, Kang B, Zhao H. Selenium exerts protective effects against heat stress-induced barrier disruption and inflammation response in jejunum of growing pigs. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:496-504. [PMID: 34145905 DOI: 10.1002/jsfa.11377] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/21/2021] [Accepted: 06/19/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Heat stress (HS) has a negative impact on the intestinal barrier and immune function of pigs. Selenium (Se) may improve intestinal health through affecting selenoproteins. Thus we investigate the protective effect of new organic Se (2-hydroxy-4-methylselenobutanoic acid, HMSeBA) on jejunal damage in growing pigs upon HS and integrate potential roles of corresponding selenoproteins. RESULTS HS decreased the villus height and increased (P < 0.05) the protein abundance of HSP70, and downregulated (P < 0.05) protein levels of tight junction-related proteins (CLDN-1 and OCLD). HS-induced jejunal damage was associated with the upregulation of four inflammation-related genes and ten selenoprotein-encoding genes, downregulation (P < 0.05) of four selenoprotein-encoding genes and decreased (P < 0.05) the protein abundance of GPX4 and SELENOS. Compared with the HS group, HMSeBA supplementation not only elevated the villus height and the ratio of V/C (P < 0:05), but also reduced (P < 0.05) the protein abundance of HSP70 and MDA content, and increased (P < 0.05) the protein abundance of OCLD. HMSeBA supplementation downregulated the expression of seven inflammation-related genes, changed the expression of 12 selenoprotein-encoding genes in jejunum mucosa affected by HS, and increased the protein abundance of GPX4, TXNRD1 and SELENOS. CONCLUSION Organic Se supplementation beyond nutritional requirement alleviates the negative effect of HS on the jejunum of growing pigs, and its protective effect is related to the response of corresponding selenoproteins. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Ying He
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Yan Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Jiayong Tang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Gang Jia
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Guangmang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Gang Tian
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Xiaoling Chen
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Jingyi Cai
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
| | - Bo Kang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Hua Zhao
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-resistance Nutrition, Ministry of Education, Chengdu, China
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Barchielli G, Capperucci A, Tanini D. The Role of Selenium in Pathologies: An Updated Review. Antioxidants (Basel) 2022; 11:antiox11020251. [PMID: 35204134 PMCID: PMC8868242 DOI: 10.3390/antiox11020251] [Citation(s) in RCA: 123] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/09/2022] [Accepted: 01/25/2022] [Indexed: 12/10/2022] Open
Abstract
Selenium is an essential microelement required for a number of biological functions. Selenium—and more specifically the amino acid selenocysteine—is present in at least 25 human selenoproteins involved in a wide variety of essential biological functions, ranging from the regulation of reactive oxygen species (ROS) concentration to the biosynthesis of hormones. These processes also play a central role in preventing and modulating the clinical outcome of several diseases, including cancer, diabetes, Alzheimer’s disease, mental disorders, cardiovascular disorders, fertility impairments, inflammation, and infections (including SARS-CoV-2). Over the past years, a number of studies focusing on the relationship between selenium and such pathologies have been reported. Generally, an adequate selenium nutritional state—and in some cases selenium supplementation—have been related to improved prognostic outcome and reduced risk of developing several diseases. On the other hand, supra-nutritional levels might have adverse effects. The results of recent studies focusing on these topics are summarized and discussed in this review, with particular emphasis on advances achieved in the last decade.
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Zhou L, Liang X, Xie M, Yin J, Huang Y, Li X, Shan Z, Chen L, Zhang Y, Luo C, Liu L. A Functional Variant in SEPP1 Interacts With Plasma Selenium Concentrations on 3-Year Lipid Changes: A Prospective Cohort Study. Front Nutr 2021; 8:789577. [PMID: 34950691 PMCID: PMC8688705 DOI: 10.3389/fnut.2021.789577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Excess selenium has been related with adverse lipid levels in previous epidemiological studies. Meanwhile, a functional variant in SEPP1 (encodes selenoprotein P), namely rs7579, has been suggested to modulate lipid metabolism. However, the interactions between selenium status and rs7579 polymorphism on lipid changes remain unclear. Objective: To examine whether the associations between plasma selenium and 3-year lipid changes is modified by rs7579 polymorphism. Methods: A prospective cohort study was conducted among 1,621 individuals to examine the associations between baseline plasma selenium and 3-year lipid changes, as well as the interactions between plasma selenium and rs7579 polymorphism on lipid changes. Results: The median (interquartile range) concentration of plasma selenium was 91.68 (81.55–104.92) μg/L. Higher plasma selenium was associated with adverse 3-year lipid changes. Comparing the highest to the lowest quartiles of plasma selenium concentrations, 3-year lipid changes were elevated by 8.25% (95% CI: 1.54–14.96%) for triglycerides (P = 0.016), 5.88% (3.13–8.63%) for total cholesterol (P < 0.001), 7.37% (3.07–11.67%) for low-density lipoprotein cholesterol (P = 0.0008), 6.44% (2.66–10.21%) for non-high-density lipoprotein cholesterol (P = 0.0009), 4.99% (0.62–9.36%) for total cholesterol/high-density lipoprotein cholesterol ratio (P = 0.025), and 7.00% (1.55–12.46%) for low-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio (P = 0.012). In analyses stratified by rs7579 genotypes, positive associations between plasma selenium concentrations and 3-year changes in triglycerides, TC, LDL-C, non-HDL-C, TC/HDL-C ratio, and LDL-C/HDL-C ratio were observed among CC genotype carriers, but negative associations between plasma selenium and TC/HDL-C ratio, and LDL-C/HDL-C ratio were observed among TT genotype carriers. Conclusions: Our findings suggested that plasma selenium was associated with 3-year lipid changes differentially by rs7579 genotypes, and higher plasma selenium was associated with adverse lipid changes among rs7579 CC genotype carriers, but not among T allele carriers.
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Affiliation(s)
- Li Zhou
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Academy of Nutrition and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Xiaoling Liang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Manling Xie
- Department of Neurology, Mayo Clinic, Rochester, MN, United States
| | - Jiawei Yin
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Huang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoqin Li
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhilei Shan
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liangkai Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Zhang
- The Hubei Provincial Key Laboratory of Yeast Function, Yichang, China
| | - Cheng Luo
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liegang Liu
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education (MOE) Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Schmalbrock LJ, Weiss G, Rijntjes E, Reinschissler N, Sun Q, Schenk M, Schomburg L. Pronounced Trace Element Variation in Follicular Fluids of Subfertile Women Undergoing Assisted Reproduction. Nutrients 2021; 13:nu13114134. [PMID: 34836389 PMCID: PMC8619388 DOI: 10.3390/nu13114134] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 02/07/2023] Open
Abstract
Female subfertility is a growing concern, especially in view of an increasing prevalence of polycystic ovary syndrome (PCOS). Assisted reproductive technologies (ART) offer a perspective for pregnancy, but the outcome rate is still suboptimal. The trace elements (TE), copper (Cu), selenium (Se), and zinc (Zn) are essential for fertility and development. We hypothesized that TE concentrations are related to oocyte quality and growth and affect pregnancy outcomes in women undergoing ART. Concentrations of TE were measured by total reflection X-ray fluorescence. Extracellular glutathione peroxidase 3 (GPX3) and selenoprotein P (SELENOP) were determined as additional Se biomarkers. Corresponding serum and follicular fluid (FF) samples were available from women with (n = 20) and without (n = 20) PCOS diagnosis undergoing hormone treatment within the ART procedure, respectively, and FF samples were classified into five groups based on morphological assessment. Serum showed higher TE concentrations than FF, and TE levels correlated positively between both matrices. Individual FF from the same women showed surprisingly high variability in TE concentration, and follicles without oocytes displayed the lowest TE concentrations. Both Se biomarkers GPX3 and SELENOP were present in FF and correlated positively to Se concentrations. Some notable relationships were observed between morphokinetic parameters, TE concentrations, and GPX3 activity. A slightly depressed serum Zn concentration was observed in PCOS. Our results indicate a direct relationship between TE in serum and FF, positive correlations between the three Se biomarkers in FF, and high variability between the FF from the same woman with the lowest TE concentrations in the follicles with the poorest quality. The differences observed in relation to PCOS diagnoses appear relatively minor. Collectively, the data support the notion that TE assessment of follicles may contribute to optimal oocyte selection and subsequently influence ART success.
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Affiliation(s)
- Lilly Johanna Schmalbrock
- Cardiovascular–Metabolic–Renal (CMR)—Research Center, Institut für Experimentelle Endokrinologie, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Hessische Straße 3-4, D-10115 Berlin, Germany; (L.J.S.); (E.R.); (Q.S.)
| | - Gregor Weiss
- Das Kinderwunsch Institut Schenk GmbH, Am Sendergrund 11, A-8143 Dobl, Austria; (G.W.); (N.R.)
| | - Eddy Rijntjes
- Cardiovascular–Metabolic–Renal (CMR)—Research Center, Institut für Experimentelle Endokrinologie, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Hessische Straße 3-4, D-10115 Berlin, Germany; (L.J.S.); (E.R.); (Q.S.)
| | - Nina Reinschissler
- Das Kinderwunsch Institut Schenk GmbH, Am Sendergrund 11, A-8143 Dobl, Austria; (G.W.); (N.R.)
| | - Qian Sun
- Cardiovascular–Metabolic–Renal (CMR)—Research Center, Institut für Experimentelle Endokrinologie, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Hessische Straße 3-4, D-10115 Berlin, Germany; (L.J.S.); (E.R.); (Q.S.)
| | - Michael Schenk
- Das Kinderwunsch Institut Schenk GmbH, Am Sendergrund 11, A-8143 Dobl, Austria; (G.W.); (N.R.)
- Correspondence: (M.S.); (L.S.)
| | - Lutz Schomburg
- Cardiovascular–Metabolic–Renal (CMR)—Research Center, Institut für Experimentelle Endokrinologie, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Hessische Straße 3-4, D-10115 Berlin, Germany; (L.J.S.); (E.R.); (Q.S.)
- Correspondence: (M.S.); (L.S.)
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Wang J, Zhang J, Zhong Y, Qin L, Li J. Sex-dimorphic distribution and anti-oxidative effects of selenomethionine and Se-methylselenocysteine supplementation. J Food Sci 2021; 86:5424-5438. [PMID: 34796490 DOI: 10.1111/1750-3841.15970] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 09/15/2021] [Accepted: 10/13/2021] [Indexed: 11/28/2022]
Abstract
Selenium (Se) is a vital trace element in human beings and is essential for protection against oxidative stress. This study aimed to investigate the accumulation and antioxidant effects of two organic seleniums, L-selenomethionine (SM) and L-Se-methylselenocysteine (SMC), through in vivo and in vitro experiments. L02 cells were pretreated with 10 nM SM or SMC for 24 h, followed by exposure to 100 nM of H₂O₂. Cell viability, apoptosis, and antioxidant capacity were detected to evaluate SM and SMC's protective effect. Organic selenium (SM and SMC) and inorganic selenium (sodium selenite, SS) were compared in terms of their in vivo accumulation and antioxidant capacity when supplemented daily and subsequently deprived in SD rats. Our results show that SM or SMC pre-treatment could significantly prevent elevated apoptosis and declined antioxidant ability. We found that organic Se supplementation resulted in higher Se accumulation than inorganic Se in the liver and kidney. The antioxidant capacity of liver and kidney tissues from rats fed with either organic selenium was significantly improved and was higher than that of SS. In summary, this study suggests that organic selenium supplements are more effective in facilitating Se accumulation in liver and kidney, enhancing antioxidant capacities, thereby protecting cells from oxidative stress. PRACTICAL APPLICATION: This study compared the antioxidant capacity of sodium selenite, L-selenomethionine, and L-Se-methylselenocysteine in vitro and in vivo. The results showed that organic selenium has a stronger antioxidant capacity and that significant differences exist in its absorption and conversion in male and female rats. Our results provide theoretical guidance for dietary supplementation of selenium.
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Affiliation(s)
- Jin Wang
- Department of Toxicology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
| | - Jiayu Zhang
- Department of Toxicology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
| | - Yuting Zhong
- Department of Toxicology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
| | - Liqiang Qin
- Department of Nutrition and Food Hygiene, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
| | - Jianxiang Li
- Department of Toxicology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
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32
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Harki E. Biophysical study of selenocysteine and selenomethionine in the gas and solution phases. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Deletion of the SELENOP gene leads to CNS atrophy with cerebellar ataxia in dogs. PLoS Genet 2021; 17:e1009716. [PMID: 34339417 PMCID: PMC8360551 DOI: 10.1371/journal.pgen.1009716] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/12/2021] [Accepted: 07/12/2021] [Indexed: 11/19/2022] Open
Abstract
We investigated a hereditary cerebellar ataxia in Belgian Shepherd dogs. Affected dogs developed uncoordinated movements and intention tremor at two weeks of age. The severity of clinical signs was highly variable. Histopathology demonstrated atrophy of the CNS, particularly in the cerebellum. Combined linkage and homozygosity mapping in a family with four affected puppies delineated a 52 Mb critical interval. The comparison of whole genome sequence data of one affected dog to 735 control genomes revealed a private homozygous structural variant in the critical interval, Chr4:66,946,539_66,963,863del17,325. This deletion includes the entire protein coding sequence of SELENOP and is predicted to result in complete absence of the encoded selenoprotein P required for selenium transport into the CNS. Genotypes at the deletion showed the expected co-segregation with the phenotype in the investigated family. Total selenium levels in the blood of homozygous mutant puppies of the investigated litter were reduced to about 30% of the value of a homozygous wildtype littermate. Genotyping >600 Belgian Shepherd dogs revealed an additional homozygous mutant dog. This dog also suffered from pronounced ataxia, but reached an age of 10 years. Selenop-/- knock-out mice were reported to develop ataxia, but their histopathological changes were less severe than in the investigated dogs. Our results demonstrate that deletion of the SELENOP gene in dogs cause a defect in selenium transport associated with CNS atrophy and cerebellar ataxia (CACA). The affected dogs represent a valuable spontaneous animal model to gain further insights into the pathophysiological consequences of CNS selenium deficiency. We studied a form of inherited ataxia in a family of Belgian Shepherd dogs that we termed CNS atrophy and cerebellar ataxia (CACA). Clinical signs were evident at 2 weeks of age and the affected puppies had to be euthanized at 4 weeks of age. The pedigree of the index family with 4 affected and 4 unaffected puppies suggested autosomal recessive inheritance. Using a purely positional cloning approach, we identified a complete deletion of the SELENOP gene as the most likely causative variant. SELENOP encodes selenoprotein P, a protein with multiple selenocysteine residues, which is required for the transport of selenium into the CNS. Selenium measurements in affected dogs demonstrated blood selenium levels of about 30% compared to normal control dogs. Genotyping a cohort of additional Belgian Shepherd dogs with unexplained ataxia identified another CACA case that had a relatively stable clinical condition and reached an age of 10 years. Selenop-/- knock-out mice show a related but not identical ataxia phenotype. Our finding of a SELENOP gene deletion in CACA affected dogs identifies a spontaneous animal model to gain further insights into the pathophysiological consequences of CNS selenium deficiency.
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Díaz M, Mesa-Herrera F, Marín R. DHA and Its Elaborated Modulation of Antioxidant Defenses of the Brain: Implications in Aging and AD Neurodegeneration. Antioxidants (Basel) 2021; 10:antiox10060907. [PMID: 34205196 PMCID: PMC8228037 DOI: 10.3390/antiox10060907] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 02/06/2023] Open
Abstract
DHA (docosahexaenoic acid) is perhaps the most pleiotropic molecule in nerve cell biology. This long-chain highly unsaturated fatty acid has evolved to accomplish essential functions ranging from structural components allowing fast events in nerve cell membrane physiology to regulation of neurogenesis and synaptic function. Strikingly, the plethora of DHA effects has to take place within the hostile pro-oxidant environment of the brain parenchyma, which might suggest a molecular suicide. In order to circumvent this paradox, different molecular strategies have evolved during the evolution of brain cells to preserve DHA and to minimize the deleterious effects of its oxidation. In this context, DHA has emerged as a member of the “indirect antioxidants” family, the redox effects of which are not due to direct redox interactions with reactive species, but to modulation of gene expression within thioredoxin and glutathione antioxidant systems and related pathways. Weakening or deregulation of these self-protecting defenses orchestrated by DHA is associated with normal aging but also, more worryingly, with the development of neurodegenerative diseases. In the present review, we elaborate on the essential functions of DHA in the brain, including its role as indirect antioxidant, the selenium connection for proper antioxidant function and their changes during normal aging and in Alzheimer’s disease.
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Affiliation(s)
- Mario Díaz
- Laboratory of Membrane Physiology and Biophysics, Department of Animal Biology, School of Biology, Universidad de La Laguna, 38206 Tenerife, Spain;
- Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias (IUETSP), Universidad de La Laguna, 38206 Tenerife, Spain
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38206 Tenerife, Spain;
- Correspondence:
| | - Fátima Mesa-Herrera
- Laboratory of Membrane Physiology and Biophysics, Department of Animal Biology, School of Biology, Universidad de La Laguna, 38206 Tenerife, Spain;
| | - Raquel Marín
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38206 Tenerife, Spain;
- Laboratory of Cellular Neurobiology, Department of Basic Medical Sciences, School of Medicine, Universidad de La Laguna, 38206 Tenerife, Spain
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Saito Y. Selenium Transport Mechanism via Selenoprotein P-Its Physiological Role and Related Diseases. Front Nutr 2021; 8:685517. [PMID: 34124127 PMCID: PMC8193087 DOI: 10.3389/fnut.2021.685517] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/07/2021] [Indexed: 02/05/2023] Open
Abstract
Selenoprotein P (SELENOP) is selenium (Se)-containing protein in plasma, which is primarily produced in the liver. The “P” in SELENOP originated from the presence in plasma. SELENOP contains selenocysteine, a cysteine analog containing Se instead of sulfur. SELENOP is a multi-functional protein to reduce phospholipid hydroperoxides and to deliver Se from the liver to other tissues, such as those of the brain and testis, playing a pivotal role in Se metabolism and antioxidative defense. Decrease in SELENOP causes various dysfunctions related to Se deficiency and oxidative stress, while excessive SELENOP causes insulin resistance. This review focuses on the Se transport system of SELENOP, particularly its molecular mechanism and physiological role in Se metabolism. Furthermore, the chemical form of Se and its biological meaning is discussed.
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Affiliation(s)
- Yoshiro Saito
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
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Temur M, Taşgöz FN, Kender Ertürk N. Elevated circulating Selenoprotein P levels in patients with polycystic ovary syndrome. J OBSTET GYNAECOL 2021; 42:289-293. [PMID: 33938349 DOI: 10.1080/01443615.2021.1887112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Selenoprotein P (SeP), an hepatokine that is primarily produced by liver, has been reported to affect glucose metabolism. In this study, we aimed to measure and compare serum SeP values in patients with polycystic ovary syndrome (PCOS) and a healthy control group, and to investigate whether there was a relationship between SeP values and insulin resistance in patients with PCOS. This prospective case-control study included 40 patients with PCOS and 39 healthy women (non-PCOS) matched for age and body mass index. SeP levels were significantly higher in the PCOS group compared with the healthy controls (7.48 ± 3.80 vs. 5.17 ± 3.20 mg/ml, p = .005). Serum insulin, hs-CRP, HOMA-IR, FBG, total-testosterone, and free-testosterone levels were higher in women with PCOS than in controls. In an unadjusted model and after adjusting for potential confounders, SeP had increased odds for PCOS (p = .007). ROC curve analysis showed that the area under the ROC curves were 0.691 (95% CI: 0.576-0.806, p < .003) for SeP levels. The optimal cut-off value of SeP for detecting PCOS was ≥5.87 mgl/ml. We showed, for the first time, that serum SeP levels were increased significantly in PCOS, Our results suggest that there is a potential link between PCOS and SeP levelsIMPACT STATEMENTWhat is already known on this subject? Selenoprotein deficiency causes various dysfunctions associated with oxidative stress, but recent studies found that increased SeP levels were associated with insulin resistance. Circulating SeP levels have been found to be increased in patients with type 2 diabetes mellitus (T2DM).What the results of this study add? Our study is the first in the literature to examine the relationship between SeP levels and the presence of PCOS. Serum SeP levels were increased significantly in PCOS.What the implications are of these findings for clinical practice and/or further research? SeP seemed to have a role in PCOS. SeP can be used to predict metabolic disorders associated with PCOS and to determine treatment methods.
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Affiliation(s)
- Muzaffer Temur
- Department of Obstetrics and Gynecology, Bursa Private Doruk Hospital, Bursa, Turkey
| | - Fatma Nurgül Taşgöz
- Department of Obstetrics and Gynecology, Bursa Yüksek İhtisas Education and Research Hospital, Bursa, Turkey
| | - Nergis Kender Ertürk
- Department of Obstetrics and Gynecology, Bursa Yüksek İhtisas Education and Research Hospital, Bursa, Turkey
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Torres DJ, Yorgason JT, Mitchell CC, Hagiwara A, Andres MA, Kurokawa S, Steffensen SC, Bellinger FP. Selenoprotein P Modulates Methamphetamine Enhancement of Vesicular Dopamine Release in Mouse Nucleus Accumbens Via Dopamine D2 Receptors. Front Neurosci 2021; 15:631825. [PMID: 33927588 PMCID: PMC8076559 DOI: 10.3389/fnins.2021.631825] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 03/19/2021] [Indexed: 12/25/2022] Open
Abstract
Dopamine (DA) transmission plays a critical role in processing rewarding and pleasurable stimuli. Increased synaptic DA release in the nucleus accumbens (NAc) is a central component of the physiological effects of drugs of abuse. The essential trace element selenium mitigates methamphetamine-induced neurotoxicity. Selenium can also alter DA production and turnover. However, studies have not directly addressed the role of selenium in DA neurotransmission. Selenoprotein P (SELENOP1) requires selenium for synthesis and transports selenium to the brain, in addition to performing other functions. We investigated whether SELENOP1 directly impacts (1) DA signaling and (2) the dopaminergic response to methamphetamine. We used fast-scan cyclic voltammetry to investigate DA transmission and the response to methamphetamine in NAc slices from C57/BL6J SELENOP1 KO mice. Recordings from SELENOP1 KO mouse slices revealed reduced levels of evoked DA release and slower DA uptake rates. Methamphetamine caused a dramatic increase in vesicular DA release in SELENOP1 KO mice not observed in wild-type controls. This elevated response was attenuated by SELENOP1 application through a selenium-independent mechanism involving SELENOP1-apolipoprotein E receptor 2 (ApoER2) interaction to promote dopamine D2 receptor (D2R) function. In wild-type mice, increased vesicular DA release in response to methamphetamine was revealed by blocking D2R activation, indicating that the receptor suppresses the methamphetamine-induced vesicular increase. Our data provide evidence of a direct physiological role for SELENOP1 in the dopaminergic response to methamphetamine and suggest a signaling role for the protein in DA transmission.
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Affiliation(s)
- Daniel J Torres
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai'i at Mânoa, Honolulu, HI, United States.,Pacific Biosciences Research Center, University of Hawai'i at Mânoa, Honolulu, HI, United States
| | - Jordan T Yorgason
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, UT, United States
| | - Catherine C Mitchell
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai'i at Mânoa, Honolulu, HI, United States
| | - Ayaka Hagiwara
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai'i at Mânoa, Honolulu, HI, United States
| | - Marilou A Andres
- Pacific Biosciences Research Center, University of Hawai'i at Mânoa, Honolulu, HI, United States
| | | | - Scott C Steffensen
- Department of Psychology, Brigham Young University, Provo, UT, United States
| | - Frederick P Bellinger
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai'i at Mânoa, Honolulu, HI, United States
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Zhang ZH, Song GL. Roles of Selenoproteins in Brain Function and the Potential Mechanism of Selenium in Alzheimer's Disease. Front Neurosci 2021; 15:646518. [PMID: 33762907 PMCID: PMC7982578 DOI: 10.3389/fnins.2021.646518] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 02/16/2021] [Indexed: 12/13/2022] Open
Abstract
Selenium (Se) and its compounds have been reported to have great potential in the prevention and treatment of Alzheimer's disease (AD). However, little is known about the functional mechanism of Se in these processes, limiting its further clinical application. Se exerts its biological functions mainly through selenoproteins, which play vital roles in maintaining optimal brain function. Therefore, selenoproteins, especially brain function-associated selenoproteins, may be involved in the pathogenesis of AD. Here, we analyze the expression and distribution of 25 selenoproteins in the brain and summarize the relationships between selenoproteins and brain function by reviewing recent literature and information contained in relevant databases to identify selenoproteins (GPX4, SELENOP, SELENOK, SELENOT, GPX1, SELENOM, SELENOS, and SELENOW) that are highly expressed specifically in AD-related brain regions and closely associated with brain function. Finally, the potential functions of these selenoproteins in AD are discussed, for example, the function of GPX4 in ferroptosis and the effects of the endoplasmic reticulum (ER)-resident protein SELENOK on Ca2+ homeostasis and receptor-mediated synaptic functions. This review discusses selenoproteins that are closely associated with brain function and the relevant pathways of their involvement in AD pathology to provide new directions for research on the mechanism of Se in AD.
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Affiliation(s)
- Zhong-Hao Zhang
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China.,Shenzhen Bay Laboratory, Shenzhen, China
| | - Guo-Li Song
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China.,Shenzhen Bay Laboratory, Shenzhen, China.,Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
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The Function of Selenium in Central Nervous System: Lessons from MsrB1 Knockout Mouse Models. Molecules 2021; 26:molecules26051372. [PMID: 33806413 PMCID: PMC7961861 DOI: 10.3390/molecules26051372] [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: 01/31/2021] [Revised: 02/25/2021] [Accepted: 02/25/2021] [Indexed: 11/17/2022] Open
Abstract
MsrB1 used to be named selenoprotein R, for it was first identified as a selenocysteine containing protein by searching for the selenocysteine insert sequence (SECIS) in the human genome. Later, it was found that MsrB1 is homologous to PilB in Neisseria gonorrhoeae, which is a methionine sulfoxide reductase (Msr), specifically reducing L-methionine sulfoxide (L-Met-O) in proteins. In humans and mice, four members constitute the Msr family, which are MsrA, MsrB1, MsrB2, and MsrB3. MsrA can reduce free or protein-containing L-Met-O (S), whereas MsrBs can only function on the L-Met-O (R) epimer in proteins. Though there are isomerases existent that could transfer L-Met-O (S) to L-Met-O (R) and vice-versa, the loss of Msr individually results in different phenotypes in mice models. These observations indicate that the function of one Msr cannot be totally complemented by another. Among the mammalian Msrs, MsrB1 is the only selenocysteine-containing protein, and we recently found that loss of MsrB1 perturbs the synaptic plasticity in mice, along with the astrogliosis in their brains. In this review, we summarized the effects resulting from Msr deficiency and the bioactivity of selenium in the central nervous system, especially those that we learned from the MsrB1 knockout mouse model. We hope it will be helpful in better understanding how the trace element selenium participates in the reduction of L-Met-O and becomes involved in neurobiology.
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Schweizer U, Bohleber S, Zhao W, Fradejas-Villar N. The Neurobiology of Selenium: Looking Back and to the Future. Front Neurosci 2021; 15:652099. [PMID: 33732108 PMCID: PMC7959785 DOI: 10.3389/fnins.2021.652099] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/08/2021] [Indexed: 12/18/2022] Open
Abstract
Eighteen years ago, unexpected epileptic seizures in Selenop-knockout mice pointed to a potentially novel, possibly underestimated, and previously difficult to study role of selenium (Se) in the mammalian brain. This mouse model was the key to open the field of molecular mechanisms, i.e., to delineate the roles of selenium and individual selenoproteins in the brain, and answer specific questions like: how does Se enter the brain; which processes and which cell types are dependent on selenoproteins; and, what are the individual roles of selenoproteins in the brain? Many of these questions have been answered and much progress is being made to fill remaining gaps. Mouse and human genetics have together boosted the field tremendously, in addition to traditional biochemistry and cell biology. As always, new questions have become apparent or more pressing with solving older questions. We will briefly summarize what we know about selenoproteins in the human brain, glance over to the mouse as a useful model, and then discuss new questions and directions the field might take in the next 18 years.
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Affiliation(s)
- Ulrich Schweizer
- Institut für Biochemie und Molekularbiologie, Medizinische Fakultät, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Simon Bohleber
- Institut für Biochemie und Molekularbiologie, Medizinische Fakultät, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Wenchao Zhao
- Institut für Biochemie und Molekularbiologie, Medizinische Fakultät, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Noelia Fradejas-Villar
- Institut für Biochemie und Molekularbiologie, Medizinische Fakultät, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
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Serum Selenium Status as a Diagnostic Marker for the Prognosis of Liver Transplantation. Nutrients 2021; 13:nu13020619. [PMID: 33672988 PMCID: PMC7918136 DOI: 10.3390/nu13020619] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/03/2021] [Accepted: 02/10/2021] [Indexed: 02/06/2023] Open
Abstract
The trace element selenium (Se) is taken up from the diet and is metabolized mainly by hepatocytes. Selenoprotein P (SELENOP) constitutes the liver-derived Se transporter. Biosynthesis of extracellular glutathione peroxidase (GPx3) in kidney depends on SELENOP-mediated Se supply. We hypothesized that peri-operative Se status may serve as a useful prognostic marker for the outcome in patients undergoing liver transplantation due to hepatocellular carcinoma. Serum samples from liver cancer patients were routinely collected before and after transplantation. Concentrations of serum SELENOP and total Se as well as GPx3 activity were determined by standardized tests and related to survival, etiology of cirrhosis/carcinoma, preoperative neutrophiles, lymphocytes, thyrotropin (TSH) and Child-Pugh and Model for End-Stage Liver Disease (MELD) scores. A total of 221 serum samples from 79 transplanted patients were available for analysis. The Se and SELENOP concentrations were on average below the reference ranges of healthy subjects. Patients with ethanol toxicity-dependent etiology showed particularly low SELENOP and Se concentrations and GPx3 activity. Longitudinal analysis indicated declining Se concentrations in non-survivors. We conclude that severe liver disease necessitating organ replacement is characterized by a pronounced Se deficit before, during and after transplantation. A recovering Se status after surgery is associated with positive prognosis, and an adjuvant Se supplementation may, thus, support convalescence.
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Solovyev N, Drobyshev E, Blume B, Michalke B. Selenium at the Neural Barriers: A Review. Front Neurosci 2021; 15:630016. [PMID: 33613188 PMCID: PMC7892976 DOI: 10.3389/fnins.2021.630016] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/20/2021] [Indexed: 12/12/2022] Open
Abstract
Selenium (Se) is known to contribute to several vital physiological functions in mammals: antioxidant defense, fertility, thyroid hormone metabolism, and immune response. Growing evidence indicates the crucial role of Se and Se-containing selenoproteins in the brain and brain function. As for the other essential trace elements, dietary Se needs to reach effective concentrations in the central nervous system (CNS) to exert its functions. To do so, Se-species have to cross the blood-brain barrier (BBB) and/or blood-cerebrospinal fluid barrier (BCB) of the choroid plexus. The main interface between the general circulation of the body and the CNS is the BBB. Endothelial cells of brain capillaries forming the so-called tight junctions are the primary anatomic units of the BBB, mainly responsible for barrier function. The current review focuses on Se transport to the brain, primarily including selenoprotein P/low-density lipoprotein receptor-related protein 8 (LRP8, also known as apolipoprotein E receptor-2) dependent pathway, and supplementary transport routes of Se into the brain via low molecular weight Se-species. Additionally, the potential role of Se and selenoproteins in the BBB, BCB, and neurovascular unit (NVU) is discussed. Finally, the perspectives regarding investigating the role of Se and selenoproteins in the gut-brain axis are outlined.
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Affiliation(s)
| | - Evgenii Drobyshev
- Institut für Ernährungswissenschaft, Universität Potsdam, Potsdam, Germany
| | - Bastian Blume
- Research Unit Analytical BioGeoChemistry, Helmholtz Center Munich – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Bernhard Michalke
- Research Unit Analytical BioGeoChemistry, Helmholtz Center Munich – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
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43
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Xu XJ, Zhang DG, Zhao T, Xu YH, Luo Z. Characterization and expression analysis of seven selenoprotein genes in yellow catfish Pelteobagrus fulvidraco to dietary selenium levels. J Trace Elem Med Biol 2020; 62:126600. [PMID: 32622174 DOI: 10.1016/j.jtemb.2020.126600] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/20/2020] [Accepted: 06/24/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Selenium (Se) appears in the selenoproteins in the form of selenocysteine (Sec) and is important for the growth and development of vertebrates. The present study characterized seven selenoproteins, consisting of the GPX1, GPX3, GPX4, SELENOW, SELENOP, TXNRD2 and TXNRD3 cDNAs in various tissues of yellow catfish, explored their regulation to dietary Se addition. METHODS 3' and 5' RACE PCR were used to clone full-length cDNA sequences of seven selenoprotein genes (GPX1, GPX3, GPX4, SELENOW, SELENOP, TXNRD2 and TXNRD3). Their molecular characterizations were analyzed, including conservative motifs and the SECIS elements. The phylogenetic trees were generated through neighbor-joining (NJ) method with MEGA 6.0 with 1000 bootstrap replications. Quantitative real-time PCR was used to explore their mRNA tissue distribution in the heart, anterior intestine, dorsal muscle, head kidney, gill, liver, brain, spleen and mesenteric fat. Yellow catfish (mixed sex) were fed diets with dietary Se contents at 0.03 (low Se), 0.25 (adequate Se) and 6.39 (high Se) mg Se/kg, respectively, for 12 weeks, and their spleen, kidney, testis and brain were used for the determination of the mRNA levels of the seven selenoproteins. RESULTS The seven selenoproteins had similar domains to their corresponding members of other vertebrates. They were widely expressed in nine tissues, including heart, liver, brain, spleen, head kidney, dorsal muscle, mesenteric fat, anterior intestine and gill, but showed tissue-dependent expression patterns. Dietary Se addition affected the expression of the seven genes in spleen, kidney, testis and brain tissues of yellow catfish. CONCLUSION Taken together, our study demonstrated the characterization, expression and regulation of seven selenoproteins, which increased our understanding of the biological functions of Se and selenoproteins in fish.
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Affiliation(s)
- Xiao-Jian Xu
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan 430070, China
| | - Dian-Guang Zhang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan 430070, China
| | - Tao Zhao
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan 430070, China
| | - Yi-Huan Xu
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhi Luo
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan 430070, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao 266237, China.
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Ma C, Hoffmann PR. Selenoproteins as regulators of T cell proliferation, differentiation, and metabolism. Semin Cell Dev Biol 2020; 115:54-61. [PMID: 33214077 DOI: 10.1016/j.semcdb.2020.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/06/2020] [Accepted: 11/10/2020] [Indexed: 02/07/2023]
Abstract
Selenium (Se) is an essential micronutrient that plays a key role in regulating the immune system. T cells are of particular interest due to their important role in promoting adaptive immunity against pathogens and cancer as well as regulating tolerance, all of which are influenced by dietary Se levels. The biological effects of Se are mainly exerted through the actions of the proteins into which it is inserted, i.e. selenoproteins. Thus, the roles that selenoproteins play in regulating T cell biology and molecular mechanisms involved have emerged as important areas of research for understanding how selenium affects immunity. Members of this diverse family of proteins exhibit a wide variety of functions within T cells that include regulating calcium flux induced by T cell receptor (TCR) engagement, shaping the redox tone of T cells before, during, and after activation, and linking TCR-induced activation to metabolic reprogramming required for T cell proliferation and differentiation. This review summarizes recent insights into the roles that selenoproteins play in these processes and their implications in understanding how Se may influence immunity.
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Affiliation(s)
- Chi Ma
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, 651 Ilalo Street, Honolulu, Hawaii 96813 USA
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, 651 Ilalo Street, Honolulu, Hawaii 96813 USA.
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45
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Wieters F, Weiss Lucas C, Gruhn M, Büschges A, Fink GR, Aswendt M. Introduction to spasticity and related mouse models. Exp Neurol 2020; 335:113491. [PMID: 33007294 DOI: 10.1016/j.expneurol.2020.113491] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/21/2020] [Accepted: 09/28/2020] [Indexed: 12/22/2022]
Abstract
Although spasticity is one of the most common causes of motor disability worldwide, its precise definition and pathophysiology remain elusive, which to date renders its experimental targeting tricky. At least in part, this difficulty is caused by heterogeneous phenotypes of spasticity-causing neurological disorders, all causing spasticity by involving upper motor neurons. The most common clinical symptoms are a series of rapid muscle contractions (clonus), an increased muscle tone (hypertonia), and augmented tendon reflex activity (hyperreflexia). This muscle overactivity is due to disturbed inhibition of spinal reflexes following upper motor neuron dysfunction. Despite a range of physical and pharmacological therapies ameliorating the symptoms, their targeted application remains difficult. Therefore, to date, spasticity impacts rehabilitative therapy, and no therapy exists that reverses the pathology completely. In contrast to the incidence and importance of spasticity, only very little pre-clinical work in animal models exists, and this research is focused on the cat or the rat spastic tail model to decipher altered reflexes and excitability of the motor neurons in the spinal cord. Meanwhile, the characterization of spasticity in clinically more relevant mouse models of neurological disorders, such as stroke, remains understudied. Here, we provide a brief introduction into the clinical knowledge and therapy of spasticity and an in-depth review of pre-clinical studies of spasticity in mice including the current experimental challenges for clinical translation.
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Affiliation(s)
- Frederique Wieters
- University of Cologne, Faculty of Medicine, University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Carolin Weiss Lucas
- University of Cologne, Faculty of Medicine, University Hospital Cologne, Center of Neurosurgery, Cologne, Germany
| | - Matthias Gruhn
- Department for Animal Physiology, Institute for Zoology, Biocenter Cologne, University of Cologne
| | - Ansgar Büschges
- Department for Animal Physiology, Institute for Zoology, Biocenter Cologne, University of Cologne
| | - Gereon R Fink
- University of Cologne, Faculty of Medicine, University Hospital Cologne, Department of Neurology, Cologne, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Center Juelich, Germany
| | - Markus Aswendt
- University of Cologne, Faculty of Medicine, University Hospital Cologne, Department of Neurology, Cologne, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Center Juelich, Germany.
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Abstract
Selenoprotein P (SeP) is one of the 25 human selenocysteine (Sec)-containing proteins, and is generally thought to function as a plasma carrier of the trace element selenium in the body. Recent studies, however, indicate unsuspected pivotal roles of SeP in human diseases, particularly in type 2 diabetes mellitus (T2DM) and pulmonary arterial hypertension (PAH). In this review, we will summarize the characteristics of SeP and recent advances in the field, especially focusing on the emerging roles of SeP in pathophysiological conditions. We will also discuss potential medical/pharmaceutical applications targeting SeP.
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Affiliation(s)
- Ryouhei Tsutsumi
- Laboratory of Metabolism and Molecular Biology, Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Yoshiro Saito
- Laboratory of Metabolism and Molecular Biology, Graduate School of Pharmaceutical Sciences, Tohoku University
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The Interaction between Dietary Selenium Intake and Genetics in Determining Cancer Risk and Outcome. Nutrients 2020; 12:nu12082424. [PMID: 32806741 PMCID: PMC7468715 DOI: 10.3390/nu12082424] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 02/06/2023] Open
Abstract
There is considerable interest in the trace element selenium as a possible cancer chemopreventive dietary component, but supplementation trials have not indicated a clear benefit. Selenium is a critical component of selenium-containing proteins, or selenoproteins. Members of this protein family contain selenium in the form of selenocysteine. Selenocysteine is encoded by an in-frame UGA codon recognized as a selenocysteine codon by a regulatory element, the selenocysteine insertion sequence (SECIS), in the 3′-untranslated region of selenoprotein mRNAs. Epidemiological studies have implicated several selenoprotein genes in cancer risk or outcome based on associations between allelic variations and disease risk or mortality. These polymorphisms can be found in or near the SECIS or in the selenoprotein coding sequence. These variations both function to control protein synthesis and impact the efficiency of protein synthesis in response to the levels of available selenium. Thus, an individual’s genetic makeup and nutritional intake of selenium may interact to predispose them to acquiring cancer or affect cancer progression to lethality.
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Selenium Deficiency Is Associated with Mortality Risk from COVID-19. Nutrients 2020; 12:nu12072098. [PMID: 32708526 PMCID: PMC7400921 DOI: 10.3390/nu12072098] [Citation(s) in RCA: 203] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 07/09/2020] [Accepted: 07/12/2020] [Indexed: 12/22/2022] Open
Abstract
SARS-CoV-2 infections underlie the current coronavirus disease (COVID-19) pandemic and are causative for a high death toll particularly among elderly subjects and those with comorbidities. Selenium (Se) is an essential trace element of high importance for human health and particularly for a well-balanced immune response. The mortality risk from a severe disease like sepsis or polytrauma is inversely related to Se status. We hypothesized that this relation also applies to COVID-19. Serum samples (n = 166) from COVID-19 patients (n = 33) were collected consecutively and analyzed for total Se by X-ray fluorescence and selenoprotein P (SELENOP) by a validated ELISA. Both biomarkers showed the expected strong correlation (r = 0.7758, p < 0.001), pointing to an insufficient Se availability for optimal selenoprotein expression. In comparison with reference data from a European cross-sectional analysis (EPIC, n = 1915), the patients showed a pronounced deficit in total serum Se (mean ± SD, 50.8 ± 15.7 vs. 84.4 ± 23.4 µg/L) and SELENOP (3.0 ± 1.4 vs. 4.3 ± 1.0 mg/L) concentrations. A Se status below the 2.5th percentile of the reference population, i.e., [Se] < 45.7 µg/L and [SELENOP] < 2.56 mg/L, was present in 43.4% and 39.2% of COVID samples, respectively. The Se status was significantly higher in samples from surviving COVID patients as compared with non-survivors (Se; 53.3 ± 16.2 vs. 40.8 ± 8.1 µg/L, SELENOP; 3.3 ± 1.3 vs. 2.1 ± 0.9 mg/L), recovering with time in survivors while remaining low or even declining in non-survivors. We conclude that Se status analysis in COVID patients provides diagnostic information. However, causality remains unknown due to the observational nature of this study. Nevertheless, the findings strengthen the notion of a relevant role of Se for COVID convalescence and support the discussion on adjuvant Se supplementation in severely diseased and Se-deficient patients.
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Moghaddam A, Heller RA, Sun Q, Seelig J, Cherkezov A, Seibert L, Hackler J, Seemann P, Diegmann J, Pilz M, Bachmann M, Minich WB, Schomburg L. Selenium Deficiency Is Associated with Mortality Risk from COVID-19. Nutrients 2020. [PMID: 32708526 DOI: 10.20944/preprints202007.0113.v1] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
SARS-CoV-2 infections underlie the current coronavirus disease (COVID-19) pandemic and are causative for a high death toll particularly among elderly subjects and those with comorbidities. Selenium (Se) is an essential trace element of high importance for human health and particularly for a well-balanced immune response. The mortality risk from a severe disease like sepsis or polytrauma is inversely related to Se status. We hypothesized that this relation also applies to COVID-19. Serum samples (n = 166) from COVID-19 patients (n = 33) were collected consecutively and analyzed for total Se by X-ray fluorescence and selenoprotein P (SELENOP) by a validated ELISA. Both biomarkers showed the expected strong correlation (r = 0.7758, p < 0.001), pointing to an insufficient Se availability for optimal selenoprotein expression. In comparison with reference data from a European cross-sectional analysis (EPIC, n = 1915), the patients showed a pronounced deficit in total serum Se (mean ± SD, 50.8 ± 15.7 vs. 84.4 ± 23.4 µg/L) and SELENOP (3.0 ± 1.4 vs. 4.3 ± 1.0 mg/L) concentrations. A Se status below the 2.5th percentile of the reference population, i.e., [Se] < 45.7 µg/L and [SELENOP] < 2.56 mg/L, was present in 43.4% and 39.2% of COVID samples, respectively. The Se status was significantly higher in samples from surviving COVID patients as compared with non-survivors (Se; 53.3 ± 16.2 vs. 40.8 ± 8.1 µg/L, SELENOP; 3.3 ± 1.3 vs. 2.1 ± 0.9 mg/L), recovering with time in survivors while remaining low or even declining in non-survivors. We conclude that Se status analysis in COVID patients provides diagnostic information. However, causality remains unknown due to the observational nature of this study. Nevertheless, the findings strengthen the notion of a relevant role of Se for COVID convalescence and support the discussion on adjuvant Se supplementation in severely diseased and Se-deficient patients.
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Affiliation(s)
- Arash Moghaddam
- ATORG, Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany
| | - Raban Arved Heller
- HTRG, Heidelberg Trauma Research Group, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, D-69118 Heidelberg, Germany.,Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Qian Sun
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Julian Seelig
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Asan Cherkezov
- ATORG, Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany
| | - Linda Seibert
- ATORG, Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany
| | - Julian Hackler
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Petra Seemann
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Joachim Diegmann
- ATORG, Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany
| | - Maximilian Pilz
- Institute of Medical Biometry and Informatics, Heidelberg University Hospital, Im Neuenheimer Feld 130.3, D-69120 Heidelberg, Germany
| | - Manuel Bachmann
- ATORG, Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, D-63739 Aschaffenburg, Germany
| | - Waldemar B Minich
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, D-13353 Berlin, Germany
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Jin Y, Chung YW, Jung MK, Lee JH, Ko KY, Jang JK, Ham M, Kang H, Pack CG, Mihara H, Kim IY. Apolipoprotein E-mediated regulation of selenoprotein P transportation via exosomes. Cell Mol Life Sci 2020; 77:2367-2386. [PMID: 31471680 PMCID: PMC11104972 DOI: 10.1007/s00018-019-03287-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 08/14/2019] [Accepted: 08/23/2019] [Indexed: 10/26/2022]
Abstract
Selenoprotein P (SELENOP), secreted from the liver, functions as a selenium (Se) supplier to other tissues. In the brain, Se homeostasis is critical for physiological function. Previous studies have reported that SELENOP co-localizes with the apolipoprotein E receptor 2 (ApoER2) along the blood-brain barrier (BBB). However, the mechanism underlying SELENOP transportation from hepatocytes to neuronal cells remains unclear. Here, we found that SELENOP was secreted from hepatocytes as an exosomal component protected from plasma kallikrein-mediated cleavage. SELENOP was interacted with apolipoprotein E (ApoE) through heparin-binding sites of SELENOP, and the interaction regulated the secretion of exosomal SELENOP. Using in vitro BBB model of transwell cell culture, exosomal SELENOP was found to supply Se to brain endothelial cells and neuronal cells, which synthesized selenoproteins by a process regulated by ApoE and ApoER2. The regulatory role of ApoE in SELENOP transport was also observed in vivo using ApoE-/- mice. Exosomal SELENOP transport protected neuronal cells from amyloid β (Aβ)-induced cell death. Taken together, our results suggest a new delivery mechanism for Se to neuronal cells by exosomal SELENOP.
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Affiliation(s)
- Yunjung Jin
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Youn Wook Chung
- Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Min Kyo Jung
- Asan Institute for Life Sciences, Asan Medical Center & Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea
- Department of Structure and Function of Neural Network, Korea Brain Research Institute, Daegu, 41068, South Korea
| | - Jea Hwang Lee
- Molecular Neurogenetics Unit, Center for Genomic Medicine, Massachusetts General Hospital, Massachusetts General Hospital, and Department of Neurology, Harvard Medical School, Boston, MA, 02114, USA
| | - Kwan Young Ko
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Jun Ki Jang
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Minju Ham
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Hyunwoo Kang
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Chan Gi Pack
- Asan Institute for Life Sciences, Asan Medical Center & Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea
| | - Hisaaki Mihara
- Department of Biotechnology, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Ick Young Kim
- Laboratory of Cellular and Molecular Biochemistry, Division of Life Sciences, Korea University, Seoul, 02841, Republic of Korea.
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