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Jujić A, Molvin J, Holm Isholth H, Dieden A, Korduner J, Zaghi A, Nezami Z, Bergmann A, Schomburg L, Magnusson M. Association between low selenoprotein P concentrations and anaemia in hospitalized heart failure patients. ESC Heart Fail 2024; 11:877-882. [PMID: 38200550 DOI: 10.1002/ehf2.14651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/22/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024] Open
Abstract
AIMS Heart failure (HF) patients with anaemia tend to have a worse outcome, with increased hospitalization rates, decreased exercise tolerance, and higher mortality compared to those without anaemia. Limited research exists on the association between selenium deficiency and anaemia specifically in HF patients, despite previous findings of a correlation in different populations. The BIOSTAT-CHF study demonstrated that higher selenium levels in HF patients were associated to a lower risk of anaemia and iron deficiency. This study investigates the relationship between selenoprotein P (SELENOP) concentrations, a major contributor and functional biomarker of selenium transport, and anaemia, Hb levels, and iron status in hospitalized HF patients. METHODS AND RESULTS SELENOP was analysed in 320 hospitalized HF subjects, with complete data available for 310 subjects. The relationships between continuous SELENOP concentrations and 1) Hb concentrations, 2) anaemia (Hb < 115 g/L (women), <130 g/L (men)), and 3) iron status (as measured by transferrin receptor 1 (TfR1) which increases in iron deficiency) were evaluated using multivariable logistic and linear regression models. Additionally, SELENOP concentrations in the lowest quartile were related to anaemia, haemoglobin, and iron state in multivariable logistic and linear models. The mean age of the study population was 75.0 ± 11.6 years, and 30% were women. Anaemia was present in 133 subjects (42.9%). SELENOP concentrations were positively correlated with haemoglobin concentrations (0.238; P < 0.001) and negatively with TfR1 concentrations (-0.238, P < 0.001). In multivariable regression models, higher SELENOP concentrations were associated with higher Hb concentrations (B = 3.23; P = 0.002) and lower TfR1 concentrations (B = -0.20; P < 0.001). Furthermore, SELENOP deficiency was associated with lower Hb concentrations (B = -7.64: P = 0.001), higher TfR1 concentrations (B = 0.31; P = 0.003), and higher odds of anaemia in HF patients (odds ratio 2.17; 95% confidence interval 1.23-3.82; P = 0.008). CONCLUSIONS In hospitalized heart failure patients, lower concentrations of SELENOP were associated with higher prevalence of anaemia.
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Affiliation(s)
- Amra Jujić
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | - John Molvin
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | - Hannes Holm Isholth
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
| | - Anna Dieden
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Biomedical Science, Malmö University, Malmö, Sweden
- Biofilms-Reseach Centre for Biointerfaces, Malmö University, Malmö, Sweden
| | - Johan Korduner
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Amir Zaghi
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Zainu Nezami
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | | | | | - Martin Magnusson
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Cardiology, Lund University, Skane University Hospital, Malmö, Sweden
- Wallenberg Center for Molecular Medicine, Lund University, Lund, Sweden
- Hypertension in Africa Research Team (HART), North West University Potchefstroom, Potchefstroom, South Africa
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Amirkhizi F, Taghizadeh M, Khalese-Ranjbar B, Hamedi-Shahraki S, Asghari S. Association of Serum Selenium and Selenoprotein P with Oxidative Stress Biomarkers in Patients with Polycystic Ovary Syndrome. Biol Trace Elem Res 2024; 202:947-954. [PMID: 37391553 DOI: 10.1007/s12011-023-03747-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 06/24/2023] [Indexed: 07/02/2023]
Abstract
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women of reproductive age which is characterized by various reproductive and metabolic disorders. Oxidative stress (OS) is now recognized to be involved in the pathogenesis of PCOS which could be targeted in the management of PCOS-related complications. Selenium (Se), as an antioxidant trace element, has been shown to decrease in PCOS patients. This study aimed to investigate the relationship between the Se and selenoprotein P (SELENOP) levels with OS markers in women with PCOS. In this cross-sectional study, 125 females aged 18-45 years diagnosed with PCOS were included. Demographic, clinical, and lifestyle information of participants were obtained using the relevant questionnaires. Fasting blood samples were collected to measure biochemical parameters. Serum levels of thiobarbituric acid reactive substances (TBARS), total antioxidant capacity (TAC), erythrocyte superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase activities as well as anthropometric measurements were assessed across tertiles of serum concentrations of Se and SELENOP. Higher serum levels of Se were associated with higher serum TAC levels (β=0.42, P<0.001) and erythrocytes GPx activity (β=0.28, P=0.002) as well as with lower serum TBARS levels (β= -0.26, P=0.003). Similarly, higher serum levels of SELENOP were associated with higher TAC (β=0.32, P<0.001) and erythrocyte GPx activity (β=0.30, P=0.001). SELENOP also showed an inverse association with serum levels of TBARS (β= -0.40, P<0.001). Nevertheless, erythrocytes SOD and CAT activities showed no significant relationships with serum Se and SELENOP concentrations (all P>0.05). The present study found that serum Se and SELENOP levels were inversely associated with TBARS levels and positively associated with TAC levels and erythrocytes GPx activity.
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Affiliation(s)
- Farshad Amirkhizi
- Department of Nutrition, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Mahdiyeh Taghizadeh
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Banafshe Khalese-Ranjbar
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudabeh Hamedi-Shahraki
- Department of Epidemiology and Biostatistics, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Somayyeh Asghari
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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Czerwińska K, Januszewska L, Markiewicz-Górka I, Jaremków A, Martynowicz H, Pawlas K, Mazur G, Poręba R, Gać P. Selenoprotein P, peroxiredoxin-5, renalase, and total antioxidant status in patients with suspected obstructive sleep apnea. Sleep Breath 2024; 28:211-219. [PMID: 37495908 PMCID: PMC10954901 DOI: 10.1007/s11325-023-02880-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/28/2023]
Abstract
PURPOSE The aim of this study was to investigate the relationship between selenoprotein P, peroxiredoxin-5, renalase, total antioxidant status (TAS), mean blood pressure (mBP), and apnea-hypopnea index (AHI). METHODS The study group consisted of 112 patients hospitalized to verify the diagnosis of obstructive sleep apnea (OSA). The inclusion criteria were consent to participate in the study and age ≥ 18 years. Patients with active proliferative disease, severe systemic diseases, or mental diseases were excluded from the study. Each patient underwent full polysomnography and had blood pressure measured. Blood samples were collected and laboratory test was performed. RESULTS Among 112 patients enrolled, there was a statistically significant negative linear correlation between blood pressure values (sBP, dBP, mBP) and selenoprotein P, renalase, and TAS levels. Similarly, there was a negative linear correlation between AHI and selenoprotein P, renalase, and TAS levels, but none between AHI and peroxiredoxin-5. Based on the obtained regression models, higher selenoprotein P, peroxiredoxin-5, and renalase levels were independently associated with higher TAS. Lower mBP values were independently associated with the use of antihypertensive drugs, higher TAS, and younger age. Male gender, higher BMI, and higher mBP were independently associated with higher AHI. CONCLUSIONS Higher concentrations of selenoprotein P, peroxiredoxin-5, and renalase were associated with higher TAS, which confirms their antioxidant properties. There was an indirect connection between tested antioxidants and blood pressure values.
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Affiliation(s)
- Karolina Czerwińska
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland
| | - Lidia Januszewska
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland
| | - Iwona Markiewicz-Górka
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland
| | - Aleksandra Jaremków
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland
| | - Helena Martynowicz
- Department of Internal and Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556, Wroclaw, PL, Poland
| | - Krystyna Pawlas
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland
| | - Grzegorz Mazur
- Department of Internal and Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556, Wroclaw, PL, Poland
| | - Rafał Poręba
- Department of Internal and Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556, Wroclaw, PL, Poland
| | - Paweł Gać
- Division of Environmental Health and Occupational Medicine, Department of Population Health, Wroclaw Medical University, Mikulicza-Radeckiego 7, 50-368, Wroclaw, PL, Poland.
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Hirako S, Wada N, Iizuka Y, Hirabayashi T, Kageyama H, Kim H, Kaibara N, Yanagisawa N, Takenoya F, Shioda S. Effect of Intracerebroventricular Administration of Galanin-Like Peptide on Hepatokines in C57BL/6 J Mice. J Mol Neurosci 2024; 74:25. [PMID: 38386221 DOI: 10.1007/s12031-024-02200-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/06/2024] [Indexed: 02/23/2024]
Abstract
Galanin-like peptide (GALP) is a neuropeptide that was first isolated and identified from the porcine hypothalamus. Studies have described an anti-obesity effect of GALP. We previously found that intracerebroventricular administration of GALP in mice resulted in an increase in respiratory exchange rate 12 to 16 h later. GALP may also affect glucose metabolism, but the detailed mechanism has not been elucidated. In this study, we investigated the effects of GALP on glucose and lipid metabolism in the liver. Nine-week-old male C57BL / 6 J mice were administered a single intracerebroventricular dose of saline or GALP and dissected 16 h later. There were no significant between-group differences in body weight and blood glucose levels. With regard to gene and protein expression, G6Pase associated with hepatic gluconeogenesis was significantly reduced in the GALP group. In addition, the hepatokines selenoprotein P and fetuin-A, which induce insulin resistance in the liver, were significantly decreased in the GALP group. These results suggest that intracerebroventricular administration of GALP decreases the expression of key hepatokines, thereby enhancing glucose metabolism.
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Affiliation(s)
- Satoshi Hirako
- Department of Health and Nutrition, University of Human Arts and Sciences, 1288 Magome, Iwatsuki-ku, Saitama-shi, Saitama, 339-8539, Japan
| | - Nobuhiro Wada
- Department of Anatomy, Sapporo Medical University School of Medicine, South 1, West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Yuzuru Iizuka
- Department of Microbiology and Immunology, Tokyo Women's Medical University School of Medicine, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Takahiro Hirabayashi
- Clinical Medicine Research Laboratory, Shonan University of Medical Sciences, 16-48 Kamishinano, Totsuka-ku, Yokohama-shi, Kanagawa, 244-0806, Japan
| | - Haruaki Kageyama
- Department of Nutrition and Dietetics, Faculty of Family and Consumer Sciences, Kamakura Women's University, 6-1-3 Ofuna, Kamakura-shi, Kanagawa, 247-8512, Japan
| | - Hyounju Kim
- Department of Nutrition and Health Sciences, Faculty of Food and Nutritional Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Ora-gun, Gunma, 374-0193, Japan
| | - Naoko Kaibara
- Department of Health and Nutrition, University of Human Arts and Sciences, 1288 Magome, Iwatsuki-ku, Saitama-shi, Saitama, 339-8539, Japan
| | - Naoko Yanagisawa
- Department of Microbiology and Immunology, Tokyo Women's Medical University School of Medicine, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Fumiko Takenoya
- Department of Sport Sciences, School of Pharmacy, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan.
| | - Seiji Shioda
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Shonan University of Medical Sciences, 16-10, Kamishinano, Totsuka-ku, Yokohama-shi, Kanagawa, 244-0806, Japan
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Schöttker B, Holleczek B, Hybsier S, Köhrle J, Schomburg L, Brenner H. Strong associations of serum selenoprotein P with all-cause mortality and mortality due to cancer, cardiovascular, respiratory and gastrointestinal diseases in older German adults. Eur J Epidemiol 2024; 39:121-136. [PMID: 38198038 PMCID: PMC10904445 DOI: 10.1007/s10654-023-01091-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 12/11/2023] [Indexed: 01/11/2024]
Abstract
BACKGROUND Selenium is an essential trace mineral. The main function of selenoprotein P (SELENOP) is to transport selenium but it has also been ascribed anti-oxidative effects. METHODS To assess the association of repeated measurements of serum SELENOP concentration with all-cause and cause-specific mortality serum SELENOP was measured at baseline and 5-year follow-up in 7,186 and 4,164 participants of the ESTHER study, a German population-based cohort aged 50-74 years at baseline. RESULTS During 17.3 years of follow-up, 2,126 study participants (30%) died. The relationship of serum SELENOP concentration with all-cause mortality was L-shaped, with mortality being significantly higher at SELENOP concentrations < 4.1 mg/L, which is near the bottom tertile's cut-off (4.2 mg/L). All-cause mortality of participants in the bottom SELENOP tertile was significantly increased compared to subjects in the top tertile (hazard ratio [95% confidence interval]: 1.35 [1.21-1.50]). SELENOP in the bottom tertile was further associated with increased cardiovascular mortality (1.24 [1.04-1.49]), cancer mortality (1.31 [1.09-1.58]), respiratory disease mortality (2.06 [1.28-3.32]) and gastrointestinal disease mortality (2.04 [1.25-3.32]). The excess risk of all-cause mortality for those in the bottom SELENOP tertile was more than twice as strong in men as in women (interaction of SELENOP and sex; p = 0.008). CONCLUSIONS In this large cohort study, serum SELENOP concentration was inversely associated with all-cause and cause-specific mortality. Consistent inverse associations with multiple mortality outcomes might be explained by an impaired selenium transport and selenium deficiency in multiple organs. Trials testing the efficacy of selenium supplements in subjects with low baseline SELENOP concentration are needed. TRIAL REGISTRATION Retrospectively registered in the German Clinical Trials Register on Feb 14, 2018 (ID: DRKS00014028).
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Affiliation(s)
- Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Im Neuenheimer Feld 581, 69120, Heidelberg, Germany.
| | - Bernd Holleczek
- Saarland Cancer Registry, Neugeländstraße 9, 66117, Saarbrücken, Germany
| | - Sandra Hybsier
- Institut für Experimentelle Endokrinologie, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité University Medicine Berlin, CCM, Hessische Straße 4A, 10115, Berlin, Germany
| | - Josef Köhrle
- Institut für Experimentelle Endokrinologie, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité University Medicine Berlin, CCM, Hessische Straße 4A, 10115, Berlin, Germany
| | - Lutz Schomburg
- Institut für Experimentelle Endokrinologie, Max Rubner Center (MRC) for Cardiovascular Metabolic Renal Research, Charité University Medicine Berlin, CCM, Hessische Straße 4A, 10115, Berlin, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Im Neuenheimer Feld 581, 69120, Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center, Im Neuenheimer Feld 460, 69120, Heidelberg, Germany
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Ando M, Suzuki K, Kitamoto R, Nakayama A, Watanabe N, Kawahara M. Differences in serum selenoprotein P profile between C57BL/6 and BALB/c mice fed high-fat diet. J Trace Elem Med Biol 2024; 81:127340. [PMID: 37984217 DOI: 10.1016/j.jtemb.2023.127340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/01/2023] [Accepted: 11/07/2023] [Indexed: 11/22/2023]
Abstract
BACKGROUND C57BL/6 mice generally show hyperglycaemia and insulin resistance when fed a high-fat diet (HFD) compared to those of BALB/c mice. However, whether these strains also show different expression profiles of selenoprotein P, a diabetes-related hepatokine, after HFD feeding is unclear. We investigated the effects of HFD on body weight, glucose metabolism, and plasma selenoprotein P levels in C57BL/6 and BALB/c mice. METHODS Male C57BL/6 and BALB/c mice aged seven weeks were divided into normal diet (ND) and HFD groups. Fasting body weights and blood sugar levels were measured weekly. Blood specimens were collected after 16 h of fasting (in weeks 7, 9, and 11) and after 24 h of subsequent refeeding (in weeks 9 and 11) to analyse plasma selenoprotein P and insulin levels. RESULTS The mean body weight of the HFD group was consistently higher than that of the ND group for both strains. However, a significant elevation in fasting plasma glucose levels from the early stage was observed only in the HFD group of C57BL/6 mice. In BALB/c mice, a difference in fasting glucose levels between the HFD and ND groups was observed after nine weeks. After seven, nine, and eleven weeks, the fasting plasma insulin levels were higher in the HFD group than in the ND group for both strains. During this period, plasma selenoprotein P levels in the HFD group were significantly higher than those in the ND group of C57BL/6 mice. However, BALB/c mice did not show a significant difference in plasma levels of selenoprotein P between the ND and HFD groups. After refeeding, the plasma insulin and selenoprotein P levels increased compared to those observed during fasting in the ND group for both strains. Elevation of insulin levels, but not of selenoprotein P levels, after refeeding was noticed in the HFD group for both strains. Plasma selenoprotein P level after refeeding was significantly lower than that during fasting in the HFD group of C57BL/6 mice. CONCLUSION Unlike C57BL/6 mice, BALB/c mice did not show elevated fasting plasma selenoprotein P levels despite HFD feeding. Additionally, the pattern of selenoprotein P levels in the plasma after refeeding differed between C57BL/6 and BALB/c mice. These differences in selenoprotein P expression among strains may be related to different susceptibilities of individuals to diabetes.
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Affiliation(s)
- Motozumi Ando
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Keiko Suzuki
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Riko Kitamoto
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Ayako Nakayama
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Norio Watanabe
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Masami Kawahara
- Laboratory of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
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Hughes DJ, Schomburg L, Jenab M, Biessy C, Méplan C, Moskal A, Sun Q, Demircan K, Fedirko V, Weiderpass E, Mukhtar M, Olsen A, Tjønneland A, Overvad K, Schulze M, Nøst TH, Skeie G, Olsen KS, Ricceri F, Grioni S, Palli D, Masala G, Tumino R, Pasanisi F, Amiano P, Colorado Yohar SM, Agudo A, Sánchez MJ, Ardanaz E, Sund M, Andersson A, Perez-Cornago A, Travis R, Heath AK, Dossus L. Prediagnostic selenium status, selenoprotein gene variants and association with breast cancer risk in a European cohort study. Free Radic Biol Med 2023; 209:381-393. [PMID: 37923090 DOI: 10.1016/j.freeradbiomed.2023.10.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/07/2023]
Abstract
Selenium (Se) may help prevent breast cancer (BC) development. Owing to limited observational evidence, we investigated whether prediagnostic Se status and/or variants in the selenoprotein genes are associated with BC risk in a large European cohort. Se status was assessed by plasma measures of Se and its major circulating proteins, selenoprotein P (SELENOP) and glutathione peroxidase 3 (GPX3), in matched BC case-control pairs (2208 for SELENOP; 1785 for GPX3 and Se) nested within the European Prospective Investigation into Cancer and Nutrition (EPIC). Single nucleotide polymorphisms (SNPs, n = 452) in 55 selenoprotein and Se metabolic pathway genes and an additional 18 variants previously associated with Se concentrations were extracted from existing genotyping data within EPIC for 1564 case-control pairs. Multivariable-adjusted logistic regression models were used to calculate the odds ratios (ORs) and 95 % confidence intervals (CIs) of the association between Se status markers, SNP variants and BC risk. Overall, there was no statistically significant association of Se status with BC risk. However, higher GPX3 activity was associated with lower risk of premenopausal BC (4th versus 1st quartile, OR = 0.54, 95 % CI: 0.30-0.98, Ptrend = 0.013). While none of the genetic variant associations (P ≤ 0.05) retained significance after multiple testing correction, rs1004243 in the SELENOM selenoprotein gene and two SNPs in the related antioxidant TXN2 gene (rs4821494 and rs5750261) were associated with respective lower and higher risks of BC at a significance threshold of P ≤ 0.01. Fourteen SNPs in twelve Se pathway genes (P ≤ 0.01) in interaction with Se status were also associated with BC risk. Higher Se status does not appear to be associated with BC risk, although activity of the selenoenzyme GPX3 may be inversely associated with premenopausal BC risk, and SNPs in the Se pathway alone or in combination with suboptimal Se status may influence BC risk.
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Affiliation(s)
- David J Hughes
- Cancer Biology and Therapeutics Group, School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland.
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité - Medical University, Berlin, Germany
| | - Mazda Jenab
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Carine Biessy
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Catherine Méplan
- School of Biomedical, Nutritional and Sport Sciences, Newcastle University, Newcastle Upon Tyne, UK
| | - Aurelie Moskal
- International Agency for Research on Cancer (IARC-WHO), Lyon, France; Research on Healthcare Performance (RESHAPE), INSERM U1290, Université Claude Bernard Lyon 1, Lyon, France
| | - Qian Sun
- Institute for Experimental Endocrinology, Charité - Medical University, Berlin, Germany
| | - Kamil Demircan
- Institute for Experimental Endocrinology, Charité - Medical University, Berlin, Germany
| | - Veronika Fedirko
- Department of Epidemiology, MD Anderson Cancer Centre, Houston, TX, USA
| | | | - Maryam Mukhtar
- Cancer Biology and Therapeutics Group, School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Anja Olsen
- Diet, Genes, and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark; Institute of Public Health, Aarhus University, Aarhus, Denmark
| | - Anne Tjønneland
- Diet, Genes, and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark; Institute of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Kim Overvad
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark; Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
| | - Matthias Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition, 14558, Nuthetal, Germany
| | - Therese Haugdahl Nøst
- Department of Community Medicine, UiT the Arctic University of Norway, N-9037, Tromsø, Norway
| | - Guri Skeie
- Department of Community Medicine, UiT the Arctic University of Norway, N-9037, Tromsø, Norway
| | - Karina Standahl Olsen
- Department of Community Medicine, UiT the Arctic University of Norway, N-9037, Tromsø, Norway
| | - Fulvio Ricceri
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy; Unit of Epidemiology, Regional Health Service ASL TO3, Grugliasco, TO, Italy
| | - Sara Grioni
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale Dei Tumori di Milano, 20133, Milano, Italy
| | - Domenico Palli
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Florence, Italy
| | - Giovanna Masala
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Florence, Italy
| | - Rosario Tumino
- Hyblean Association for Epidemiological Research, AIRE ONLUS Ragusa, Italy
| | - Fabrizio Pasanisi
- Departiment Di Medicina Clinica E Chirurgia Federico Ii University, Naples, Italy
| | - Pilar Amiano
- Ministry of Health of the Basque Government, Sub Directorate for Public Health and Addictions of Gipuzkoa, San Sebastian, Spain; Biodonostia Health Research Institute, Epidemiology of Chronic and Communicable Diseases Group, San Sebastián, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Sandra M Colorado Yohar
- Department of Epidemiology, Murcia Regional Health Council, IMIB, Murcia, Spain; Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Research Group on Demography and Health, National Faculty of Public Health, University of Antioquia, Medellín, Colombia
| | - Antonio Agudo
- Unit of Nutrition and Cancer, Catalan Institute of Oncology - ICO, L'Hospitalet de Llobregat, Spain; Nutrition and Cancer Group, Epidemiology, Public Health, Cancer Prevention and Palliative Care Program, Bellvitge Biomedical Research Institute - IDIBELL, L'Hospitalet de Llobregat, Spain
| | - Maria-Jose Sánchez
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Escuela Andaluza de Salud Pública (EASP), 18011, Granada, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, 18012, Granada, Spain; Department of Preventive Medicine and Public Health, University of Granada, 18071, Granada, Spain
| | - Eva Ardanaz
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Navarra Public Health Institute, Pamplona, Spain; IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Malin Sund
- Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden; Department of Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Anne Andersson
- Department of Radiation Sciences/Oncology, Umeå University, Umeå, Sweden
| | - Aurora Perez-Cornago
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK
| | - Ruth Travis
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK
| | - Alicia K Heath
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Laure Dossus
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
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8
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Mehta R, Krupa C, Ahmed T, Hamer DH, Al Mahmud A. Associations between maternal and infant selenium status and child growth in a birth cohort from Dhaka, Bangladesh. Br J Nutr 2023; 130:1558-1572. [PMID: 36944370 PMCID: PMC10551473 DOI: 10.1017/s0007114523000739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/05/2023] [Accepted: 03/15/2023] [Indexed: 03/23/2023]
Abstract
Deficiency of essential trace element, Se, has been implicated in adverse birth outcomes and in child linear growth because of its important role in redox biology and associated antioxidant effects. We used data from a randomised controlled trial conducted among a cohort of pregnant and lactating women in Dhaka, Bangladesh to examine associations between Se biomarkers in whole blood (WBSe), serum and selenoprotein P (SEPP1) in maternal delivery and venous cord (VC) blood. Associations between Se biomarkers, birth weight and infant growth outcomes (age-adjusted length, weight, head circumference and weight-for-length z-scores) at birth, 1 and 2 years of age were examined using regression analyses. WB and serum Se were negatively associated with birth weight (adjusted β, 95 % CI, WBSe delivery: −26·6 (–44·3, −8·9); WBSe VC: −19·6 (–33·0, −6·1)); however, delivery SEPP1 levels (adjusted β: −37·5 (–73·0, −2·0)) and VC blood (adjusted β: 82·3 (30·0, 134·7)) showed inconsistent and opposite associations with birth weight. Positive associations for SEPP1 VC suggest preferential transfer from mother to fetus. We found small associations between infant growth and WBSe VC (length-for-age z-score β, 95 % CI, at birth: −0·05 (–0·1, −0·01)); 12 months (β: −0·05 (–0·08, −0·007)). Weight-for-age z-score also showed weak negative associations with delivery WBSe (at birth: −0·07 (–0·1, −0·02); 12 -months: −0·05 (–0·1, −0·005)) and in WBSe VC (at birth: −0·05 (–0·08, −0·02); 12 months: −0·05 (–0·09, −0·004)). Given the fine balance between essential nutritional and toxic properties of Se, it is possible that WB and serum Se may negatively impact growth outcomes, both in utero and postpartum.
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Affiliation(s)
- Rukshan Mehta
- Centre for Global Child Health, The Hospital for Sick Children, Toronto, Canada
| | - Christine Krupa
- Centre for Global Child Health, The Hospital for Sick Children, Toronto, Canada
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Tahmeed Ahmed
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Davidson H. Hamer
- Department of Global Health, Boston University School of Public Health, Boston, MA, USA
- Section of Infectious Diseases, Boston University School of Medicine, Boston, MA, USA
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Abdullah Al Mahmud
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
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9
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Umemura A, Sasaki A, Takamura T, Takayama H, Takeshita Y, Toya Y, Kakisaka K, Hasegawa Y, Ishigaki Y. Relationship between the changes in hepatokine levels and metabolic effects after laparoscopic sleeve gastrectomy in severely obese patients. Surg Today 2023:10.1007/s00595-023-02767-w. [PMID: 37957316 DOI: 10.1007/s00595-023-02767-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/25/2023] [Indexed: 11/15/2023]
Abstract
PURPOSE To clarify the relationships between the changes in hepatokines and weight loss, and between these changes and the metabolic effects, and the roles played by these changes, after laparoscopic sleeve gastrectomy (LSG). METHODS We recruited 25 Japanese patients with severe obesity, who underwent LSG. We measured two hepatokines: selenoprotein P (SeP) and leukocyte cell-derived chemotaxin 2 (LECT2), at the baseline, and then 6 months and 1 year after LSG. Finally, we compared the changes in the hepatokines with the parameters of type 2 diabetes (T2D) and non-alcoholic steatohepatitis (NASH). RESULTS Changes in LECT2 were correlated with the percentage of total weight loss (ρ = - 0.499, P = 0.024) and the decrease in total fat area (ρ = 0.559, P = 0.003). The changes in SeP were correlated with those in hemoglobin A1c (ρ = 0.526, P = 0.043) and the insulinogenic index (ρ = 0.638, P = 0.010) in T2D patients. In patients with NASH, the LECT2 levels were correlated with liver steatosis (ρ = 0.601). CONCLUSIONS SeP levels decrease in association with HbA1c reduction, whereas LECT2 levels are associated with reductions in fat mass and NASH scores after LSG. Hepatokines may be involved in the pathology of obesity and its complications.
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Affiliation(s)
- Akira Umemura
- Department of Surgery, Iwate Medical University School of Medicine, 2-1-1 Idaidori, Yahaba, Iwate, 028-3695, Japan.
| | - Akira Sasaki
- Department of Surgery, Iwate Medical University School of Medicine, 2-1-1 Idaidori, Yahaba, Iwate, 028-3695, Japan
| | - Toshinari Takamura
- Department of Endocrinology and Metabolism, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Hiroaki Takayama
- Department of Endocrinology and Metabolism, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Yumie Takeshita
- Department of Endocrinology and Metabolism, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Yosuke Toya
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University School of Medicine, Yahaba, Iwate, 028-3695, Japan
| | - Keisuke Kakisaka
- Division of Hepatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Yahaba, Iwate, 028-3695, Japan
| | - Yutaka Hasegawa
- Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Iwate Medical University School of Medicine, Yahaba, Iwate, 028-3695, Japan
| | - Yasushi Ishigaki
- Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Iwate Medical University School of Medicine, Yahaba, Iwate, 028-3695, Japan
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10
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Jujic A, Molvin J, Schomburg L, Hartmann O, Bergmann A, Melander O, Magnusson M. Selenoprotein P deficiency is associated with higher risk of incident heart failure. Free Radic Biol Med 2023; 207:11-16. [PMID: 37423559 DOI: 10.1016/j.freeradbiomed.2023.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/30/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
INTRODUCTION Selenium deficiency has been associated with mortality, cardiovascular disease and worsened prognosis in heart failure (HF). In a recent population-based study, high selenium levels were shown to be associated with reduced mortality and reduced incidence of HF, but only in non-smokers. Here, we aimed to examine if selenoprotein P (SELENOP), a main selenium carrier protein, is associated with incident HF. MATERIALS AND METHODS SELENOP concentrations were measured in plasma of 5060 randomly selected subjects from the population-based prospective cohort "Malmö Preventive Project" (n = 18240) using an ELISA approach. Exclusion of subjects with prevalent HF (n = 230) and subjects with missing data on co-variates included in the regression analysis (n = 27) resulted in complete data for 4803 subjects (29.1% women, mean age 69.6 ± 6.2 years, 19.7% smokers). Cox regression models adjusted for traditional risk factors were used to analyse SELENOP's association with incident HF. Further, subjects within the quintile with the lowest SELENOP concentrations were compared to subjects in the remaining quintiles. RESULTS Each 1 standard deviation increment in SELENOP levels was associated with lower risk of incident HF (n = 436) during a median follow-up period of 14.7 years (hazard ratio (HR) 0.90; CI95% 0.82-0.99; p = 0.043). Further analyses showed that subjects in the lowest SELENOP quintile were at the highest risk of incident HF when compared to quintiles 2-5 (HR 1.52; CI95% 1.21-1.89; p = 2.5 × 10-4). CONCLUSION Low selenoprotein P levels are associated with a higher risk of incident HF in a general population. Further studies are warranted.
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Affiliation(s)
- Amra Jujic
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden; Department of Cardiology, Skåne University Hospital, Malmö, Sweden
| | - John Molvin
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden; Department of Cardiology, Skåne University Hospital, Malmö, Sweden
| | - Lutz Schomburg
- Institut für Experimentelle Endokrinologie, CCM, Charité-Universitätsmedizin Berlin, Germany
| | | | | | - Olle Melander
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden; Department of Emergency and Internal Medicine, Clinical Research Center, Skåne University Hospital, Malmö, Sweden
| | - Martin Magnusson
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden; Department of Cardiology, Skåne University Hospital, Malmö, Sweden; Wallenberg Center for Molecular Medicine, Lund University, Lund, Sweden; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.
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11
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Luo J, Su L, He X, Du Y, Xu N, Wu R, Zhu Y, Wang T, Shao R, Unverzagt FW, Hake AM, Jin Y, Gao S. Blood Selenium and Serum Glutathione Peroxidase Levels Were Associated with Serum β-Amyloid in Older Adults. Biol Trace Elem Res 2023; 201:3679-3687. [PMID: 36370334 DOI: 10.1007/s12011-022-03480-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/06/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Studies have established the association between blood β-amyloid (Aβ) levels and Alzheimer's disease, but population-based studies concerning the association between selenium (Se) and Aβ levels in blood samples are very limited. Therefore, we explored the association in an elderly population with Se status and serum Aβ measures. METHODS A cross-sectional study on 469 elderly individuals from four rural counties with diverse soil Se levels was carried out. Fasting blood Se, serum selenoprotein P (SELENOP), and glutathione peroxidase (GPX), serum Aβ42, and Aβ40 were measured. Quantile regression models were used to determine the associations of blood Se, serum GPX, and SELENOP with Aβ levels. RESULTS Significant negative associations were observed between blood Se and serum Aβ42 and Aβ40 levels at all percentiles (P < 0.05). The associations were generally stronger at higher Aβ42 and Aβ40 percentiles than lower Aβ42 and Aβ40 percentiles. Blood Se was positively associated with serum Aβ42/Aβ40 ratio at 25th, 50th, and 75th percentiles. Significant positive associations were observed between serum GPX and Aβ42 and Aβ40 levels at all percentiles (P < 0.05). The positive associations were generally stronger at higher Aβ42 and Aβ40 percentiles than at lower percentiles. Serum GPX was negatively associated with Aβ42/Aβ40 ratio at 25th, 50th, 75th, and 95th percentiles. No associations with serum SELENOP and Aβ levels were observed. CONCLUSIONS Our results suggest that higher Se levels are associated with lower serum Aβ42 and Aβ40 levels and with higher Aβ42/Aβ40 ratio, and the results are specific for different selenoproteins.
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Affiliation(s)
- Jiao Luo
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China
- School of Public Health, Guizhou Medical University, Guiyang, 550025, China
| | - Liqin Su
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China.
| | - Xiaohong He
- Tujia and Miao Autonomous Prefecture Center for Disease Control and Prevention, Enshi, 445000, China
| | - Yegang Du
- Academy of Metrology & Quality Inspection, Shenzhen, 518000, China
| | - Ning Xu
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China
| | - Rangpeng Wu
- Tujia and Miao Autonomous Prefecture Center for Disease Control and Prevention, Enshi, 445000, China
| | - Yunfeng Zhu
- Tujia and Miao Autonomous Prefecture Center for Disease Control and Prevention, Enshi, 445000, China
| | - Ting Wang
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China
| | - Ranqi Shao
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China
| | - Frederick W Unverzagt
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Ann M Hake
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Yinlong Jin
- CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, 29 Nanwei Road, Beijing, 100050, China
| | - Sujuan Gao
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, 46202-2872, USA
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12
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Filippini T, Urbano T, Grill P, Malagoli C, Ferrari A, Marchesi C, Natalini N, Michalke B, Vinceti M. Human serum albumin-bound selenium (Se-HSA) in serum and its correlation with other selenium species. J Trace Elem Med Biol 2023; 79:127266. [PMID: 37499550 DOI: 10.1016/j.jtemb.2023.127266] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/23/2023] [Accepted: 07/20/2023] [Indexed: 07/29/2023]
Abstract
INTRODUCTION Selenium (Se) is a trace element with different toxicological and nutritional properties according to its chemical forms. Among the wide range of selenium species, human serum albumin-bound selenium (Se-HSA) has still uncertain composition in terms of organic or inorganic selenium species. This study aimed at investigating the relation between Se-HSA levels with total selenium and the specific organic and inorganic selenium species. METHODS We determined levels of total selenium and selenium species in serum of participants enrolled in two populations of the Emilia-Romagna region, in Northern Italy. Anion exchange chromatography coupled with inductively coupled plasma dynamic reaction cell mass spectrometry was used as quantification method. Correlations between Se-HSA and the other selenium compounds were analyzed using linear regression and restricted cubic spline regression models, adjusted for potential confounders. RESULTS The first cohort comprised 50 participants (men/women: 26/24) with median (interquartile range, IQR) age 50 (55-62) years, while the second was composed of 104 participants (M/W: 50/54), median (IQR) age 48 (44-53) years. Median (IQR) levels of total selenium were 118.5 (109-136) µg/L and 116.5 (106-128) µg/L, respectively, while Se-HSA was 25.5 µg/L (16.2-51.5) and 1.1 (0.03-3.1) µg/L, respectively. In both populations, Se-HSA was positively associated with inorganic selenium species. Conversely, Se-HSA was inversely associated with organic selenium, especially with selenoprotein P-bound-Se (Se-SELENOP) and less strongly with selenomethionine-bound-Se (Se-Met), while the relation was null or even positive with other organic species. Evaluation of non-linear trends showed a substantially positive association with inorganic selenium, particularly selenite, until a concentration of 30 µg/L, above which a plateau was reached. The association with Se-SELENOP was inverse and strong until 100 µg/L, while it was almost null at higher levels. CONCLUSIONS Our findings seem to indicate that Se-HSA incorporates more selenium when circulating levels of inorganic compounds are higher, thus supporting its mainly inorganic nature, particularly at high circulating levels of selenite.
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Affiliation(s)
- Tommaso Filippini
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy; School of Public Health, University of California Berkeley, Berkeley, CA, USA.
| | - Teresa Urbano
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Peter Grill
- Research Unit Analytical BioGeoChemistry, Helmholtz Center Munich - German Research Center for Environmental Health, Neuherberg, Germany
| | - Carlotta Malagoli
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Angela Ferrari
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Cristina Marchesi
- Head Office, Azienda USL, IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | | | - Bernhard Michalke
- Research Unit Analytical BioGeoChemistry, Helmholtz Center Munich - German Research Center for Environmental Health, Neuherberg, Germany
| | - Marco Vinceti
- CREAGEN - Environmental, Genetic and Nutritional Epidemiology Research Center, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy; Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
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13
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Abuduwaili H, Kamoshita K, Ishii KA, Takahashi K, Abuduyimiti T, Qifang L, Isobe Y, Goto H, Nakano Y, Takeshita Y, Takayama H, Harada K, Takamura T. Selenoprotein P deficiency protects against immobilization-induced muscle atrophy by suppressing atrophy-related E3 ubiquitin ligases. Am J Physiol Endocrinol Metab 2023. [PMID: 36947851 DOI: 10.1152/ajpendo.00270.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
The quality of skeletal muscle is maintained by a balance between protein biosynthesis and degradation. Disruption in this balance results in sarcopenia. However, its underlying mechanisms remain under-investigated. Selenoprotein P (SeP; encoded by Selenop in mice) is a hepatokine that is upregulated in type 2 diabetes and aging and causes signal resistances via reductive stress. We created immobilized muscle atrophy (IMM) model in Selenop knockout (KO) mice. IMM significantly reduced cross-sectional areas and the size of skeletal muscle fibers, which were ameliorated in KO mice. IMM upregulated the genes encoding E3 ubiquitin ligases and their upstream FoxO1, FoxO3, and KLF15 transcription factors in the skeletal muscle, which were suppressed in KO mice. These findings suggest a possible involvement of SeP-mediated reductive stress in physical inactivity-mediated sarcopenia, which may be a therapeutic target against sarcopenia.
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Affiliation(s)
- Halimulati Abuduwaili
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Kyoko Kamoshita
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Kiyo-Aki Ishii
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
- Department of Integrative Medicine for Longevity, Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Kenta Takahashi
- Department of Human Pathology, Kanazawa University Graduate School of Medical Sciences, Ishikawa, Japan
| | - Tuerdiguli Abuduyimiti
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Li Qifang
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Yuki Isobe
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Hisanori Goto
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Yujiro Nakano
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Yumie Takeshita
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
| | - Hiroaki Takayama
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
- Department of System Biology, Kanazawa University Graduate School of Medical Sciences, Ishikawa, Japan
| | - Kenichi Harada
- Department of Human Pathology, Kanazawa University Graduate School of Medical Sciences, Ishikawa, Japan
| | - Toshinari Takamura
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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15
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Amirkhizi F, Khalese-Ranjbar B, Mansouri E, Hamedi-Shahraki S, Asghari S. Correlations of selenium and selenoprotein P with asymmetric dimethylarginine and lipid profile in patients with polycystic ovary syndrome. J Trace Elem Med Biol 2023; 75:127101. [PMID: 36395675 DOI: 10.1016/j.jtemb.2022.127101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/25/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is associated with an increased risk of cardiovascular diseases (CVD). Accumulating evidence has suggested that selenium (Se) is of importance for optimal function of the cardiovascular system. This study aimed to investigate the associations of selenium and selenoprotein P (SePP) with asymmetric dimethylarginine (ADMA) and lipid profile in women with PCOS. METHODS In this cross-sectional study, 125 females aged 18-45 years diagnosed with PCOS were recruited. An interviewer-administered questionnaire was applied to gather the relevant demographic characteristics, detailed clinical information, and lifestyle habits of participants. Fasting blood samples were obtained to measure biochemical parameters. Serum concentrations of total testosterone, sex hormone-binding globulin (SHBG), ADMA, and lipid profiles as well as anthropometric measurements were assessed across tertiles of serum Se and SePP concentrations. RESULTS There was a positive correlation between serum Se and SePP concentrations (r = 0.434, p < 0.001). Serum Se level was inversely correlated with ADMA (r = -0.21, p = 0.025) and TG (r = -0.17, p = 0.041) concentrations. There were also inverse correlations between SePP and ADMA (r = -0.34, p < 0.001), TG (r = -0.21, p = 0.019), and oxidized low density lipoprotein (ox-LDL) (r = -0.25, p = 0.007) levels. No significant relationship was found between serum Se and SePP concentrations with total cholesterol, low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), apolipoprotein-A1 (Apo-A1), apolipoprotein-B (Apo-B100), total testosterone, SHBG, and free androgen index as well as anthropometric parameters (All p > 0.05). CONCLUSION The present study found that Se and SePP levels were inversely correlated with ADMA and TG concentrations as well as ox-LDL levels.
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Affiliation(s)
- Farshad Amirkhizi
- Department of Nutrition, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Banafshe Khalese-Ranjbar
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Elahe Mansouri
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudabeh Hamedi-Shahraki
- Department of Epidemiology and Biostatistics, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Somayyeh Asghari
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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de Almeida CB, Leite HP, Lopes Junior E, Konstantyner T, Franco MDCP. Erythrocyte and plasma selenium in children with acute inflammatory response. J Trace Elem Med Biol 2022; 74:127068. [PMID: 36162157 DOI: 10.1016/j.jtemb.2022.127068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 08/20/2022] [Accepted: 09/08/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Plasma selenium may not reflect selenium status in critically ill patients because it transiently decreases inversely with the magnitude of the systemic inflammatory response. The decision to supplement selenium should ideally be based on laboratory measurements that reliably reflect selenium status. We hypothesized that erythrocyte selenium, unlike plasma selenium, is not affected by the systemic inflammatory response in critically ill children. METHODS In a prospective study of 109 critically ill children, plasma and erythrocyte selenium concentrations were evaluated on admission, and plasma selenoprotein P was evaluated on days 1, 2, and 3 of the ICU stay. The main outcome was the effect of systemic inflammation on the erythrocyte and plasma selenium concentrations. The magnitude of the systemic inflammatory response was measured using serum C-reactive protein (CRP) and procalcitonin levels. The covariates were age, sex, anthropometric nutritional status, diagnosis of severe sepsis/septic shock, and clinical severity on admission. Multiple linear regression and generalized estimating equations were used for statistical analysis. RESULTS Erythrocyte selenium levels were not influenced by the magnitude of the inflammatory response or by the patient's clinical severity. Procalcitonin (β coefficient=-0.99; 95%CI: -1.64; -0.34, p = 0.003) and clinical severity (β coefficient= -11.13; 95%CI: -21.6; -0.63), p = 0.038) on admission were associated with decreased plasma selenium concentrations. Erythrocyte selenium was associated with selenoprotein P in the first three days of ICU stay (β coefficient=0.32; 95%CI: 0.20; 0.44, p < 0.001). CONCLUSION Unlike plasma selenium, erythrocyte selenium does not change in children with an acute systemic inflammatory response and is associated with selenoprotein P concentrations. Erythrocyte selenium is probably a more reliable marker than plasma selenium for evaluating the selenium status in critically ill children.
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Affiliation(s)
- Cláudia Bezerra de Almeida
- Discipline of Pediatric Nutrition, Department of Pediatrics, Universidade Federal de São Paulo, São Paulo, Brazil.
| | - Heitor Pons Leite
- Discipline of Pediatric Nutrition, Department of Pediatrics, Universidade Federal de São Paulo, São Paulo, Brazil.
| | - Emilio Lopes Junior
- Discipline of Pediatric Nutrition, Department of Pediatrics, Universidade Federal de São Paulo, São Paulo, Brazil.
| | - Tulio Konstantyner
- Discipline of Pediatric Nutrition, Department of Pediatrics, Universidade Federal de São Paulo, São Paulo, Brazil.
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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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Forceville X, Laviolle B, Gromadzinska J, Boutten A, Van Antwerpen P, Plouvier E, Annane D, Bellissant E. Delayed increase of plasma selenoproteins and absence of side effect induced by infusion of pharmacological dose of sodium selenite in septic shock: Secondary analysis of a multicenter, randomized controlled trial. J Trace Elem Med Biol 2022; 73:127031. [PMID: 35793609 DOI: 10.1016/j.jtemb.2022.127031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 06/14/2022] [Accepted: 06/24/2022] [Indexed: 10/17/2022]
Abstract
BACKGROUND In sepsis, neutrophil respiratory bursts participate in endothelium damage, the first step to multiple organ failure. In plasma two antioxidant selenoenzymes, which protect the endothelium, decrease: selenoprotein-P, and to a lesser extent glutathione peroxidase (GPX3). Sodium selenite (Na2SeO3) is a Se donor, but also an oxidant chemotherapy drug depending on its concentration. In a previous published study, Na2SeO3 continuous infusion in septic shock patients at a pharmacological dose of 4 mg1 Se/day on day-1, followed by a high nutritional dose of 1 mg Se/day during 9 days, showed no beneficial effect on weaning of catecholamine nor on survival. In this ancillary study, we report clinical and biological effects of such continuous infusion of Na2SeO3. METHODS: This was a multicenter, placebo-controlled, double-blind study on 60 patients. Na2SeO3 or placebo in continuous infusion as described above. Evolution with time of plasma Se, selenoprotein-P, GPX3, Organ dysfunction (sequential organ failure assessment SOFA scores, including PaO2/FiO2, for respiratory failure, and plasma lactate) and quality of life at 6 months (by SF36 scores) were analyzed using two-way (time, treatment) non-parametric repeated-measures analysis of variance (Friedman test). MAIN RESULTS At baseline, plasma Se was about a quarter of reference values. From baseline to day-4 plasma Se, selenoprotein-P and GPX3 significantly increased by 3.9, 2.7 and 1.8 respectively in the Na2SeO3 group as compared with placebo and remained elevated by 2.3, 2.7 and 2.1 at day-14 respectively (p < 0.001). Na2SeO3 did not affect global and organ by organ SOFA Scores and plasma lactate concentration at day-1 and later up to day-14. The evolution of PaO2/FiO2 until day-14 was similar in the two groups. Quality of life in the surviving patients at 6 months was similar between the two groups. CONCLUSION Continuous infusion of Na2SeO3 at 4 mg Se at day-1 seems to have neither beneficial nor toxic effect at day-1 or later and induces a late increase of selenoprotein-P at day-4. Preclinical studies are required to confirm the use of Na2SeO3 as a cytotoxic drug against neutrophils and protection of the endothelium by selenoprotein-P.
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Affiliation(s)
- Xavier Forceville
- Service de Réanimation Médico-Chirurgicale-USC, Grand Hôpital de l'Est Francilien, site de Meaux, Hôpital Saint Faron, 6-8 rue Saint Fiacre, 77104 Meaux, France; Univ Rennes, CHU Rennes, Inserm, CIC 1414 (Centre d'Investigation Clinique de Rennes), F-35000 Rennes, France.
| | - Bruno Laviolle
- Univ Rennes, CHU Rennes, Inserm, CIC 1414 (Centre d'Investigation Clinique de Rennes), F-35000 Rennes, France.
| | - Jolanta Gromadzinska
- Biological and Environmental Monitoring Department, Nofer Institute of Occupational Medicine, 8 Teresy St., 90-950 Lodz, Poland.
| | - Anne Boutten
- Laboratoire de biochimie, Hôpital Bichat-Claude Bernard, APHP, 46 rue Henri Huchard, 75877 Paris cedex 18, France.
| | - Pierre Van Antwerpen
- Pharmacognosy, Bioanalysis and Drug Discovery and Analytical Platform of the Faculty of Pharmacy, Université libre de Bruxelles (ULB), Bld du Triomphe Campus Plaine 205/05, 1050 Bruxelles, Belgium.
| | - Elisabeth Plouvier
- Laboratoire de Biochimie, Grand Hôpital de l'Est Francilien, site de Meaux, Hôpital Saint Faron, 6-8 rue Saint Fiacre, 77104 Meaux, France.
| | - Djillali Annane
- Service de Réanimation Médicale, Hôpital Raymond Poincaré, 104 boulevard Raymond Poincaré, 92380 Garches, France; U1173 Lab. of Inflammation & Infection, (Fédération Hospitalo-Universitaire) FHU SEPSIS, Université Paris Saclay-campus (Université de Versailles Saint-Quentin-en-Yvelines) UVSQ, France.
| | - Eric Bellissant
- Univ Rennes, CHU Rennes, Inserm, CIC 1414 (Centre d'Investigation Clinique de Rennes), F-35000 Rennes, France.
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20
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Qi L, Zhou H, Wang Y, Jablonska E, Wang M, Su S, Jia Y, Wang R, Jiang M, Wang Y, Zhang Y, Li Q, Wang T. The role of selenoprotein P in the determining the sensitivity of cervical cancer patients to concurrent chemoradiotherapy: A metabonomics-based analysis. J Trace Elem Med Biol 2022; 73:127041. [PMID: 35905604 DOI: 10.1016/j.jtemb.2022.127041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/08/2022] [Accepted: 07/15/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND The effect of selenoprotein P (SELENOP) levels on the sensitivity of cervical cancer patients to concurrent chemoradiotherapy (CCRT) has not been reported. In this study, the effects of the variations in plasma SELENOP levels on the sensitivity of cervical cancer patients to CCRT were investigated using metabonomics. METHODS Two patient groups were evaluated, i.e., the case group: 11 patients with intermediate to advanced primary squamous cervical cancer, who developed resistance against CCRT, and the sensitivity group: 11 patients who did not develop resistance were matched in a 1:1 ratio (controls). Blood samples were collected before and after CCRT, and the plasma SELENOP levels were measured by ELISA. The different metabolites present in the plasma were analyzed by UPLC-MS-MS. RESULTS SELENOP levels exhibited a significant reduction in both the resistant and sensitive groups after CCRT (F = 50.705, P < 0.001), and interaction effects between sensitivity and pre-and post-treatment on SELENOP levels were observed (F = 7.414, P = 0.013). Further, a more significant reduction in the SELENOP levels was observed in the CCRT-resistant group (mean reduction, 0.028 µg/mL; P < 0.001) than in the sensitive group (mean reduction, 0.013 µg/mL; P = 0.006). Four metabolic biomarkers, i.e., C18, C19, C20 sphingomyelin, and phosphatidylcholine 20:2/22:6, were shown to be differentially expressed between the resistant and sensitive groups pre-and post-treatment. C20 sphingomyelin levels exhibited a significant correlation with SELENOP levels (r = -0.326, P = 0.031). CONCLUSION The levels of plasma SELENOP in the CCRT-resistant group decreased significantly, suggesting that SELENOP might affect the sensitivity by modulating lipid synthesis and metabolism.
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Affiliation(s)
- Lei Qi
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China
| | - Huihui Zhou
- Department of Public Health, Jining Medical University, Jining 272029, China
| | - Yuanyuan Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China
| | - Ewa Jablonska
- Department of Translational Research, Nofer Institute of Occupational Medicine, Sw. Teresy 8 Street, Lodz 91-348, Poland
| | - Mingxing Wang
- Department of Gynecological Radiotherapy, Harbin Medical University Cancer Hospital, Harbin 150081, China
| | - Shengqi Su
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China
| | - Yuehui Jia
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China
| | - Ruixiang Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China
| | - Meijing Jiang
- Department of Gynecological Radiotherapy, Harbin Medical University Cancer Hospital, Harbin 150081, China
| | - Yanan Wang
- School of Public Health and Management, Binzhou Medical University, No.346 Guanhai Road, Laishan District, Yantai 264003, China
| | - Yiyi Zhang
- Yantai Center for Disease Control and Prevention, No.17 Fuhou Road, Laishan District, Yantai 264003, China
| | - Qi Li
- Department of Gynecological Radiotherapy, Harbin Medical University Cancer Hospital, Harbin 150081, China.
| | - Tong Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin 150081, China.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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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: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Manceau A. Comment on "New insights into the biomineralization of mercury selenide nanoparticles through stable isotope analysis in giant petrel tissues". J Hazard Mater 2022; 431:128583. [PMID: 35278961 DOI: 10.1016/j.jhazmat.2022.128583] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Some birds and cetaceans can demethylate the toxic methylmercury cysteinate (MeHgCys) complex into inert mercury sulfide (HgSe) through the formation of an intermediate tetrahedral selenolate complex with selenocysteine (Sec) residues (Hg(Sec)4). The nucleation of the HgSe biominerals involves the substitution of the Se ligand for the Sec residues, which is considered to occur in the form of multinuclear Hgx(Se,Sec)y clusters mediated by proteins. Queipo-Abad et al. (2022) isolated HgSe nanoparticles from the biological tissues of giant petrels and measured the mass-dependent fractionation of the 202Hg isotope (δ202Hg). They concluded that the δ202Hg values of the HgSe nanoparticles from each tissue of individual petrels are specific to the HgSe species alone and that the Hg(Sec)4 → HgSe reaction occurs without fractionation of the 202Hg isotope. We show (1) that the HgSe nanoparticles are likely mixtures of MeHgCys, Hg(Sec)4, and HgSe, and therefore that the δ202Hg values are not species-specific, and (2) that the 202Hg isotope is actually fractionated during the Hg(Sec)4 → HgSe reaction, and therefore that this isotope can be used to trace the Hg metabolic pathways between tissues in a single individual and in different animals.
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Affiliation(s)
- Alain Manceau
- Université Grenoble Alpes, ISTerre, CNRS, 38000 Grenoble, France.
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Kitabayashi N, Nakao S, Mita Y, Arisawa K, Hoshi T, Toyama T, Ishii KA, Takamura T, Noguchi N, Saito Y. Role of selenoprotein P expression in the function of pancreatic β cells: Prevention of ferroptosis-like cell death and stress-induced nascent granule degradation. Free Radic Biol Med 2022; 183:89-103. [PMID: 35318102 DOI: 10.1016/j.freeradbiomed.2022.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/07/2022] [Accepted: 03/11/2022] [Indexed: 02/05/2023]
Abstract
Selenoprotein P (SELENOP) is a major selenium (Se)-containing protein (selenoprotein) in human plasma that is mainly synthesized in the liver. SELENOP transports Se to the cells, while SELENOP synthesized in peripheral tissues is incorporated in a paracrine/autocrine manner to maintain the levels of cellular selenoproteins, called the SELENOP cycle. Pancreatic β cells, responsible for the synthesis and secretion of insulin, are known to express SELENOP. Here, using MIN6 cells as a mouse model for pancreatic β cells and Selenop small interfering (si)RNA, we found that Selenop gene knockdown (KD) resulted in decreased cell viability, cellular pro/insulin levels, insulin secretion, and levels of several cellular selenoproteins, including glutathione peroxidase 4 (Gpx4) and selenoprotein K (Selenok). These dysfunctions induced by Selenop siRNA were recovered by the addition of Se. Ferroptosis-like cell death, regulated by Gpx4, was involved in the decrease of cell viability by Selenop KD, while stress-induced nascent granule degradation (SINGD), regulated by Selenok, was responsible for the decrease in proinsulin. SINGD was also observed in the pancreatic β cells of Selenop knockout mice. These findings indicate a significant role of SELENOP expression for the function of pancreatic β cells by maintaining the levels of cellular selenoproteins such as GPX4 and SELENOK.
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Affiliation(s)
- Nanako Kitabayashi
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan
| | - Shohei Nakao
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan
| | - Yuichiro Mita
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan
| | - Kotoko Arisawa
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - Takayuki Hoshi
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - Takashi Toyama
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - Kiyo-Aki Ishii
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, 920-8640, Japan
| | - Toshinari Takamura
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, 920-8640, Japan
| | - Noriko Noguchi
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan
| | - Yoshiro Saito
- The Systems Life Sciences Laboratory, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan; Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan.
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Takeshita Y, Teramura C, Kamoshita K, Takayama H, Nakagawa H, Enyama Y, Ishii KA, Tanaka T, Goto H, Nakano Y, Osada S, Tanaka Y, Tokuyama K, Takamura T. Effects of eicosapentaenoic acid on serum levels of selenoprotein P and organ-specific insulin sensitivity in humans with dyslipidemia and type 2 diabetes. J Diabetes Investig 2021; 13:532-542. [PMID: 34670012 PMCID: PMC8902388 DOI: 10.1111/jdi.13699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/26/2021] [Accepted: 10/10/2021] [Indexed: 11/30/2022] Open
Abstract
Aim Selenoprotein P (SeP, encoded by SELENOP in humans) is a hepatokine that causes insulin resistance in the liver and skeletal muscle. It was found that polyunsaturated fatty acid eicosapentaenoic acid (EPA) downregulates Selenop expression by inactivating SREBP‐1c. The present study aimed to examine the effect of EPA for 12 weeks on circulating SeP levels and insulin sensitivity in humans with type 2 diabetes. Methods A total of 20 participants with dyslipidemia and type 2 diabetes were randomly assigned to an EPA (900 mg, twice daily) group and a control group. The primary endpoint was a change in serum SeP levels. Organ‐specific insulin sensitivity in the liver (HGP and %HGP), skeletal muscle (Rd), and adipose tissue (FFA and %FFA) were assessed using a hyperinsulinemic‐euglycemic clamp study with stable isotope‐labeled glucose infusion. Results Serum SeP levels were not changed in either group at the end of the study. In the EPA group, the changes in SeP levels were positively correlated with the change in serum EPA levels (r = 0.709, P = 0.022). Treatment with EPA significantly enhanced %FFA but not %HGP and Rd. The change in serum EPA levels was significantly positively correlated with the change in %HGP, and negatively correlated with changes in Rd. Conclusions The change in serum EPA levels was positively correlated with serum SeP levels, hepatic insulin sensitivity, and negatively with skeletal muscle insulin sensitivity in humans with type 2 diabetes. The EPA‐induced enhancement of hepatic insulin sensitivity might be associated with a mechanism independent of serum SeP levels.
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Affiliation(s)
- Yumie Takeshita
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Chisato Teramura
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kyoko Kamoshita
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Hiroaki Takayama
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Hiromi Nakagawa
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Yasufumi Enyama
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kiyo-Aki Ishii
- Department of Integrative Medicine for Longevity, Kanazawa University Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Takeo Tanaka
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Hisanori Goto
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Yujiro Nakano
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Sachie Osada
- Department of Hospital Pharmacy, Kanazawa University Hospital, Kanazawa, Japan
| | - Yoshiaki Tanaka
- International Institute for Integrative Sleep Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kumpei Tokuyama
- International Institute for Integrative Sleep Medicine, University of Tsukuba, Ibaraki, Japan
| | - Toshinari Takamura
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
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Kiyohara ACP, Torres DJ, Hagiwara A, Pak J, Rueli RHLH, Shuttleworth CWR, Bellinger FP. Selenoprotein P Regulates Synaptic Zinc and Reduces Tau Phosphorylation. Front Nutr 2021; 8:683154. [PMID: 34277682 PMCID: PMC8280497 DOI: 10.3389/fnut.2021.683154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 05/26/2021] [Indexed: 01/11/2023] Open
Abstract
Selenoprotein P (SELENOP1) is a selenium-rich antioxidant protein involved in extracellular transport of selenium (Se). SELENOP1 also has metal binding properties. The trace element Zinc (Zn2+) is a neuromodulator that can be released from synaptic terminals in the brain, primarily from a subset of glutamatergic terminals. Both Zn2+ and Se are necessary for normal brain function. Although these ions can bind together with high affinity, the biological significance of an interaction of SELENOP1 with Zn2+ has not been investigated. We examined changes in brain Zn2+ in SELENOP1 knockout (KO) animals. Timm-Danscher and N-(6-methoxy-8-quinolyl)-p-toluenesulphonamide (TSQ) staining revealed increased levels of intracellular Zn2+ in the SELENOP1-/- hippocampus compared to wildtype (WT) mice. Mass spectrometry analysis of frozen whole brain samples demonstrated that total Zn2+ was not increased in the SELENOP1-/- mice, suggesting only local changes in Zn2+ distribution. Unexpectedly, live Zn2+ imaging of hippocampal slices with a selective extracellular fluorescent Zn2+ indicator (FluoZin-3) showed that SELENOP1-/- mice have impaired Zn2+ release in response to KCl-induced neuron depolarization. The zinc/metal storage protein metallothionein 3 (MT-3) was increased in SELENOP1-/- hippocampus relative to wildtype, possibly in response to an elevated Zn2+ content. We found that depriving cultured cells of selenium resulted in increased intracellular Zn2+, as did inhibition of selenoprotein GPX4 but not GPX1, suggesting the increased Zn2+ in SELENOP1-/- mice is due to a downregulation of antioxidant selenoproteins and subsequent release of Zn2+ from intracellular stores. Surprisingly, we found increased tau phosphorylation in the hippocampus of SELENOP1-/- mice, possibly resulting from intracellular zinc changes. Our findings reveal important roles for SELENOP1 in the maintenance of synaptic Zn2+ physiology and preventing tau hyperphosphorylation.
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Affiliation(s)
- Arlene C. P. Kiyohara
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Daniel J. Torres
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States,Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Ayaka Hagiwara
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Jenna Pak
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Rachel H. L. H. Rueli
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States
| | | | - Frederick P. Bellinger
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States,*Correspondence: Frederick P. Bellinger
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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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Wang Y, Zou Y, Wang T, Han S, Liu X, Zhang Y, Su S, Zhou H, Zhang X, Liang H. A spatial study on serum selenoprotein P and Keshan disease in Heilongjiang Province, China. J Trace Elem Med Biol 2021; 65:126728. [PMID: 33610059 DOI: 10.1016/j.jtemb.2021.126728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/08/2020] [Accepted: 02/02/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Few spatial studies on serum selenoprotein P (SELENOP) and Keshan disease (KD) have been reported at the county-level in Heilongjiang province, China. This study aimed to provide visualized spatial epidemiological evidence of selenium molecular marker in residents living in endemic areas for the precise assessment of prevention, control, and elimination of KD. METHODS Using a spatial ecological study design, 587 subjects living in cities, townships, and rural areas of 50 KD endemic counties and 37 non-endemic counties in Heilongjiang province were investigated. The serum SELENOP levels of the participants were measured by enzyme-linked immunosorbent assay. Thematic maps were created, and spatial regression analysis was conducted using ordinary least squares. RESULTS The mean serum SELENOP level of the 587 subjects was 7.4 ± 3.0 μg/mL. The mean levels of serum SELENOP were higher in cities (7.4 ± 2.9 μg/mL) and townships (7.9 ± 3.2 μg/mL) than in rural areas (6.0 ± 3.0 μg/mL). The mean levels of serum SELENOP were trending towards high levels in non-endemic areas (7.4 ± 3.0 μg/mL) than in KD endemic areas (6.3 ± 3.3 μg/mL). Spatial regression analysis showed that the serum SELENOP level was positively correlated with the per capita gross domestic product. CONCLUSION Selenium deficiency may still exist in some KD endemic counties in Heilongjiang province, including Lingdong, Nenjiang, and Baiquan; these counties should be considered as key areas for precision prevention, control, and elimination of KD. Inclusion of selenium in the national surveillance of KD will provide more evidence for the assessment of KD elimination from a selenium nutrition perspective.
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Affiliation(s)
- Yanan Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Yuanjie Zou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Tong Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Shan Han
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Xu Liu
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Yiyi Zhang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Shengqi Su
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Huihui Zhou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Xiao Zhang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
| | - Hong Liang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, PR China.
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Long Z, Xiang J, Song J, Lu Y, Yin H, Zhu Y, Liu X, Qin L, Bañuelos GS, Wang Z, Kang Y, Yuan L, Yin X. Soil Selenium Concentration and Residents Daily Dietary Intake in a Selenosis Area: A Preliminary Study in Yutangba Village, Enshi City, China. Bull Environ Contam Toxicol 2020; 105:798-805. [PMID: 32909074 DOI: 10.1007/s00128-020-02983-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 09/03/2020] [Indexed: 06/11/2023]
Abstract
In 1963, selenosis occurred in Yutangba Village, Enshi City, China. Subsequently, local residents migrated to a new area of Yutangba to avoid high selenium (Se) exposure. In this study, 19 soil samples, 43 food samples, 60 hair samples and 58 plasma samples from local residents were randomly collected in New Yutangba Village. The mean total Se concentrations in cultivated soil samples were 1753.6 ± 742.8 µg/kg (n = 14). The estimated daily Se intake in New Yutangba Village decreased to 63.2 ± 39.8 µg/day, slightly higher than the recommended dietary Se intake for adults in China (60 µg/day). The mean Se concentrations in hair and plasma samples were 549.7 ± 165.2 µg/kg (n = 60) and 98.4 ± 32.1 µg/L (n = 58), respectively. The result indicated that appropriate activities, such as relocation, consuming a mixture of local foods and market foods containing low Se concentration, could effectively reduce the risk of high Se exposure.
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Affiliation(s)
- Zedong Long
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China
- Soil and Fertilizer Institute, Hunan Academy of Agricultural Science, Changsha, 410125, Hunan, China
| | - Jiqian Xiang
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, Hubei, China
| | - Jiaping Song
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Yapu Lu
- Advanced Lab for Functional Agriculture, Suzhou Institute of University of Science and Technology of China, Suzhou, 215123, Jiangsu, China
| | - Hongqing Yin
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, Hubei, China
| | - Yunfen Zhu
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, Hubei, China
| | - Xiaodong Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Liqiang Qin
- School of Public Health, Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Gary S Bañuelos
- Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, USDA, 9611 S. Riverbend Ave, Parlier, 93648-9757, CA, USA
| | - Zhangmin Wang
- Advanced Lab for Functional Agriculture, Suzhou Institute of University of Science and Technology of China, Suzhou, 215123, Jiangsu, China
| | - Yu Kang
- Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, 445000, Hubei, China
| | - Linxi Yuan
- Department of Health and Environmental Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, Jiangsu, China.
| | - Xuebin Yin
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China.
- Advanced Lab for Functional Agriculture, Suzhou Institute of University of Science and Technology of China, Suzhou, 215123, Jiangsu, China.
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Arias-Borrego A, Callejón-Leblic B, Rodríguez-Moro G, Velasco I, Gómez-Ariza JL, García-Barrera T. A novel HPLC column switching method coupled to ICP-MS/QTOF for the first determination of selenoprotein P (SELENOP) in human breast milk. Food Chem 2020; 321:126692. [PMID: 32251923 DOI: 10.1016/j.foodchem.2020.126692] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 03/13/2020] [Accepted: 03/23/2020] [Indexed: 01/23/2023]
Abstract
In this work, we describe for the first time the presence of selenoprotein P in human breast milk. To this end, a novel analytical method has been developed based on a two-dimensional column switching system, which consisted of three size exclusion columns and one affinity column coupled to inductively coupled plasma mass spectrometry (ICP-MS). The method combines the accurate quantification of selenoproteins and selenometabolites by species unspecific isotopic dilution ICP-MS, with unequivocal identification by quadrupole-time-of-flight mass spectrometry. Several selenopeptides, which contain the amino acid selenocysteine (U, SeCys), were identified after tryptic digestion followed by their separation. The results reveal that the relative selenium concentration in colostrum follows the order: glutathione peroxidase (GPX) ≈ selenoprotein P (SELENOP) > selenocystamine (SeCA) > other selenometabolites (SeMB), in contrast with previously published papers (GPX > SeCA > selenocystine > selenomethionine). A mean concentration of 20.1 ± 1.0 ng Se g-1 as SELENOP (1.45 μg SELENOP/g) was determined in colostrum (31% of total selenium).
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Affiliation(s)
- A Arias-Borrego
- Research Center for Natural Resources, Health and The ENvironment (RENSMA), Department of Chemistry "Prof. J.C Vílchez Martín", University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain
| | - B Callejón-Leblic
- Research Center for Natural Resources, Health and The ENvironment (RENSMA), Department of Chemistry "Prof. J.C Vílchez Martín", University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain
| | - G Rodríguez-Moro
- Research Center for Natural Resources, Health and The ENvironment (RENSMA), Department of Chemistry "Prof. J.C Vílchez Martín", University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain
| | - I Velasco
- Pediatrics, Obstetrics & Gynecology Unit, Hospital de Riotinto, Avda la Esquila 5, 21.660 Minas de Riotinto, Huelva, Spain
| | - J L Gómez-Ariza
- Research Center for Natural Resources, Health and The ENvironment (RENSMA), Department of Chemistry "Prof. J.C Vílchez Martín", University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain.
| | - T García-Barrera
- Research Center for Natural Resources, Health and The ENvironment (RENSMA), Department of Chemistry "Prof. J.C Vílchez Martín", University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain.
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Abstract
Selenoprotein P (SeP; encoded by SELENOP) is selenium (Se)-rich plasma protein that is mainly produced in the liver. SeP functions as a Se-transport protein to deliver Se from the liver to other tissues, such as the brain and testis. The protein plays a pivotal role in Se metabolism and antioxidative defense, and it has been identified as a 'hepatokine' that causes insulin resistance in type 2 diabetes. SeP levels are increased in type 2 diabetes patients, and excess SeP impairs insulin signalling, promoting insulin resistance. Furthermore, increased levels of SeP disturb the functioning of pancreatic β cells and inhibit insulin secretion. This review focuses on the biological function of SeP and the molecular mechanisms associated with the adverse effects of excess SeP on pancreatic β cells' function, particularly with respect to redox reactions. Interactions between the liver and pancreas are also discussed.
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Affiliation(s)
- Yoshiro Saito
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, C301, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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Abstract
Conflicting data link nonalcoholic fatty liver disease (NAFLD), a disease with no currently approved treatment, with selenium (Se) and selenoprotein P (SELENOP), a glycoprotein synthesized and primarily secreted by the hepatocytes, functioning as a Se transporter from the liver to other tissues. This review aims to summarize the evidence between Se, SELENOP, and NAFLD, which may hopefully clarify whether current data on Se and SELENOP in NAFLD warrant further investigation for their diagnostic and therapeutic potential. Most, albeit not all, experimental data show a favorable effect of Se on hepatic steatosis, inflammation, and fibrosis. It seems that Se may exert an antioxidant effect on the liver, at least partly via increasing the activity of glutathione peroxidase, whose depletion contributes to the pathogenesis of hepatic inflammation and fibrosis. Se may also affect metalloproteinases, cytokines, and growth factors participating in the pathogenesis of NAFLD and, most importantly, may induce the apoptosis of hepatic stellate cells, the key players in hepatic fibrosis. However, the association between Se or SELENOP and insulin resistance, which is a principal pathogenetic factor of NAFLD, remains inconclusive. Clinical studies on Se or SELENOP in NAFLD are conflicting, apart from those in advanced liver disease (cirrhosis or hepatocellular carcinoma), in which lower circulating Se and SELENOP are constant findings. Existing data warrant further mechanistic studies in valid animal models of human NAFLD. Prospective cohort studies and possibly randomized controlled trials are also needed to elucidate the diagnostic and therapeutic potential of Se supplementation in selected NAFLD individuals with Se deficiency.
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Affiliation(s)
- Stergios A Polyzos
- First Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Campus of Aristotle University of Thessaloniki, 54124, Thessaloniki, Macedonia, Greece.
| | - Jannis Kountouras
- Second Medical Clinic, School of Medicine, Ippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Antonis Goulas
- First Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Campus of Aristotle University of Thessaloniki, 54124, Thessaloniki, Macedonia, Greece
| | - Leonidas Duntas
- Endocrine Unit, Evgenidion Hospital, National Kapodestrian University, Athens, Greece
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Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease associated with cognitive decline, loss of memory, and progressive cerebral atrophy. The trace element selenium (Se) is known to be involved in brain pathology. Selenoprotein P (SELENOP), as the main Se transport protein, is, to a great extent, responsible for maintaining Se homeostasis and the hierarchy of selenoprotein expression in the body. Adequate Se supply through SELENOP is vital for proper brain development and function. Additionally, SELENOP may be implicated in pathological processes in the central nervous system, including those in AD. The current review summarizes recent findings on the possible role of SELENOP in AD, with a focus on probable mechanisms: Se delivery to neurons, antioxidant activity, cytoskeleton assembly, interaction with redox-active metals (e.g., copper and iron), and misfolded proteins (amyloid beta and tau protein). The use of SELENOP as a biomarker of Se status is also briefly discussed. Epidemiological studies on Se supplementation are beyond the scope of the current review.
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Affiliation(s)
- Nikolay Solovyev
- Institute of Chemistry, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, Russian Federation, 199034.
- Department of Chemistry, Atomic & Mass Spectrometry - A&MS Research Unit, Ghent University, Campus Sterre, Krijgslaan, 281-S12, 9000, Ghent, Belgium.
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Hackler J, Wisniewska M, Greifenstein-Wiehe L, Minich WB, Cremer M, Bührer C, Schomburg L. Copper and selenium status as biomarkers of neonatal infections. J Trace Elem Med Biol 2020; 58:126437. [PMID: 31778962 DOI: 10.1016/j.jtemb.2019.126437] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 10/16/2019] [Accepted: 11/12/2019] [Indexed: 12/19/2022]
Abstract
Neonatal infections are a major risk factor for neonatal mortality. A reliable diagnosis of early-onset sepsis (EOS) is hampered by the variable clinical presentations of the children. We hypothesized that changes in the Se or Cu status, or the biomarkers selenoprotein P (SELENOP) or ceruloplasmin (CP) alone or in combination may be informative of EOS. We generated a new human CP-specific non-competitive immunoassay (ELISA) suitable of analysing small sample volumes and validated the method with a commercial CP source. Using this novel CP assay, we analysed a case-control study of EOS (n = 19 control newborns, n = 18 suspected cases). Concentrations of Se, Cu, SELENOP, CP, interleukin-6 (IL-6), and C-reactive protein (CRP) along with the Cu/Se and CP/SELENOP ratios were evaluated by correlation analyses as biomarkers for EOS. Diagnostic value was estimated by receiver operating characteristic (ROC) curve analyses. The new CP-ELISA displayed a wide working range (0.10-6.78 mg CP/L) and low sample requirement (2 μL of serum, EDTA-, heparin- or citrate-plasma). Plasma CP correlated positively with Cu concentrations in the set of all samples (Pearson r = 0.8355, p < 0.0001). Three of the infected neonates displayed particularly high ratios of Cu/Se and CP/SELENOP, i.e., 3.8- to 6.9-fold higher than controls. Both the Cu/Se and the CP/SELENOP ratios correlated poorly with the early infection marker IL-6, but strongly and positively with the acute-phase protein CRP (Cu/Se-CRP: Spearman ϱ = 0.583, p = 0.011; CP/SELENOP-CRP: ϱ = 0.571, p = 0.013). The ROC curve analyses indicate that a combination of biomarkers for the Se and Cu status do not improve the early identification of EOS considerably. This study established a robust, highly precise, partly validated and scalable novel CP sandwich ELISA suitable for basic and clinical research, requiring minute amounts of sample. The ratio of circulating CP/SELENOP constitutes a promising new composite biomarker for detection of EOS, at least in a subset of severely diseased children.
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Affiliation(s)
- Julian Hackler
- Institute for Experimental Endocrinology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Monika Wisniewska
- Institute for Experimental Endocrinology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Lennart Greifenstein-Wiehe
- Institute for Experimental Endocrinology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, 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, Berlin, Germany
| | - Malte Cremer
- Department of Neonatology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Christoph Bührer
- Department of Neonatology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 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, Berlin, Germany.
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Seelig J, Heller RA, Hackler J, Haubruck P, Moghaddam A, Biglari B, Schomburg L. Selenium and copper status - potential signposts for neurological remission after traumatic spinal cord injury. J Trace Elem Med Biol 2020; 57:126415. [PMID: 31685353 DOI: 10.1016/j.jtemb.2019.126415] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/23/2019] [Accepted: 10/05/2019] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Traumatic Spinal Cord Injury (TSCI) is a severe incident resulting in loss of motor and sensory function caused by complex pathological mechanisms including massive oxidative stress and extensive inflammatory processes. The essential trace elements selenium (Se) and copper (Cu) play crucial roles as part of the antioxidant defense. HYPOTHESIS Remission after TSCI is associated with characteristic dynamics of early changes in serum Cu and Se status. STUDY DESIGN Single-center prospective observational study. PATIENTS AND METHODS Serum samples from TSCI patients were analyzed (n = 52); 21 recovered and showed a positive abbreviated injury score (AIS) conversion within 3 months (G1), whereas 21 had no remission (G0). Ten subjects with vertebral fractures without neurological impairment served as control (C). Different time points (at admission, and after 4, 9, 12, and 24 h) were analyzed for total serum Se and Cu concentrations by total reflection X-ray fluorescence, and for Selenoprotein P (SELENOP) and Ceruloplasmin (CP) by sandwich ELISA. RESULTS At admission, CP and SELENOP concentrations were higher in the remission group (G1) than in the non-remission group (G0). Within 24 h, there were marginal changes in Se, SELENOP, Cu and CP concentrations in the groups of controls (C) and G0. In contrast, these parameters decreased significantly in G1. Binary logistic regression analysis including Cu and Se levels at admission in combination with Se and CP levels after 24 h allowed a prediction for potential remission, with an area under the curve (AUC) of 87.7% (CI: 75.1%-100.0%). CONCLUSION These data indicate a strong association between temporal changes of the Se and Cu status and the clinical outcome after TSCI. The dynamics observed may reflect an ongoing redistribution of the trace elements in favor of a better anti-inflammatory response and a more successful neurological regeneration.
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Affiliation(s)
- Julian Seelig
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Raban Arved Heller
- Institute for Experimental Endocrinology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, 13353 Berlin, Germany; Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, 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, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Patrick Haubruck
- Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany; Raymond Purves Bone and Joint Research Laboratories, Kolling Institute of Medical Research, Institute of Bone and Joint Research, University of Sydney, St Leonards, New South Wales, 2065, Australia
| | - Arash Moghaddam
- Aschaffenburg Trauma and Orthopedic Research Group, Center for Orthopedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, Aschaffenburg, Germany
| | - Bahram Biglari
- BG Trauma Center Ludwigshafen, Department of Paraplegiology, Ludwigshafen, 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, Augustenburger Platz 1, 13353 Berlin, Germany.
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Zhang Q, Li W, Wang J, Hu B, Yun H, Guo R, Wang L. Selenium Levels in Community Dwellers with Type 2 Diabetes Mellitus. Biol Trace Elem Res 2019; 191:354-362. [PMID: 30725267 DOI: 10.1007/s12011-019-1645-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/17/2019] [Indexed: 02/08/2023]
Abstract
Selenium (Se) is an essential micronutrient required by the human body and exerts biological functions through selenoproteins. The relationship between Se and diabetes remains ambiguous. This study aimed at, through measurements of serum selenoprotein P (SelP), glutathione peroxidase (GPx3), and Se content in serum and hair, evaluating Se levels in community dwellers with type 2 diabetes mellitus (T2DM). A total of 336 subjects, including 176 T2DM patients (65.5 ± 8.7 years old) and 160 healthy residents (63.7 ± 9.8 years old, as controls), were recruited in this cross-sectional community-based study performed in Suzhou. Samples of fasting venous blood and hair were collected for measurements of Se levels, glycometabolism, and biochemistry parameters. We found that the serum Se level and SelP concentration in T2DM patients were substantially higher than those in healthy residents (p < 0.05). There was no significant difference in GPx3 activity and hair Se level between the two groups of subjects (p > 0.05). Serum Se was positively correlated with both GPx3 and hair Se in T2DM patients (r = 0.167 and 0.164, respectively, p < 0.05) and negatively correlated with SelP in healthy controls (r = - 0.293, p < 0.05). In conclusion, this study showed significantly higher levels of serum Se and SelP in community dwellers with T2DM than in matched healthy residents.
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Affiliation(s)
- Qianqian Zhang
- School of Nursing, Medical College, Soochow University, No.1 Shizi Street, Suzhou, 215006, China
| | - Wenxia Li
- School of Nursing, Medical College, Soochow University, No.1 Shizi Street, Suzhou, 215006, China
| | - Jian Wang
- Research Center, Soochow Setek Biotechnology Co., Ltd, Suzhou, China
| | - Biyue Hu
- School of Nursing, Medical College, Soochow University, No.1 Shizi Street, Suzhou, 215006, China
| | - Hang Yun
- School of Nursing, Medical College, Soochow University, No.1 Shizi Street, Suzhou, 215006, China
| | - Renmei Guo
- Research Center, Soochow Setek Biotechnology Co., Ltd, Suzhou, China
| | - Li Wang
- School of Nursing, Medical College, Soochow University, No.1 Shizi Street, Suzhou, 215006, China.
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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; 77:2367-86. [PMID: 31471680 DOI: 10.1007/s00018-019-03287-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [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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Abstract
Many researchers pay attention to novel secretory factors, such as adipokines or osteokines, secreted by the tissues that were not formerly recognized as classical endocrine organs. The liver also contributes to the onset of various kinds of pathologies of type 2 diabetes and obesity by producing and releasing secretory proteins "hepatokines." By using the information of gene expression in human livers, we rediscovered selenoprotein P (SeP) and leukocyte cell-derived chemotaxin 2 (LECT2) as hepatokines involved in the onset of glucose intolerance. SeP was previously recognized as a selenium transport protein, but we revealed that SeP causes insulin resistance in the muscle and liver. SeP also reduces VEGF signal transduction in vascular endothelial cells, contributing the impaired angiogenesis in diabetes. Importantly, SeP impairs health-promoting effects of exercise training by suppressing reactive oxygen species (ROS)/adenosine monophosphate-dependent protein kinase (AMPK) pathway in the skeletal muscle through its receptor low-density lipoprotein receptor-related protein 1 (LRP1). LECT2, previously-reported as a neutrophil chemotactic protein, promotes skeletal muscle insulin resistance in obesity. Further studies are necessary to develop new diagnostic or therapeutic procedures targeting hepatokines to combat type 2 diabetes or obesity.
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Affiliation(s)
- Hirofumi Misu
- Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Ishikawa 920-8641, Japan
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Bi M, Zhang H, Yuan L, Zhao L, Liu R. Molecular mechanisms of lead-induced changes of selenium status in mice livers through interacting with selenoprotein P. Ecotoxicol Environ Saf 2019; 175:282-288. [PMID: 30921565 DOI: 10.1016/j.ecoenv.2019.03.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
As a heavy metal generally considered to be toxic, lead displays the destruction of the antioxidant system and causes oxidative damage through animal, cellular and molecular evidences. Selenium exists in the form of selenocysteine (Sec) upon its incorporation into selenoproteins and plays vital roles in protection from oxidative stress caused by toxic materials such as lead. This study investigated mechanisms of lead-induced changes of selenium status both at the animal and molecular levels. Total selenium concentrations in blood plasma, contents of glutathione peroxidase 3 (Gpx3) and selenoprotein P (SelP) in blood plasma and mRNA levels of key selenoproteins in mice livers were significantly inhibited after lead exposure, and indicators of oxidative damages in mice livers caused by lead also presented significantly higher, including levels of reactive oxygen species, malonaldehyde concentration and TNF-α levels. To further confirm the hypothesis that lead may disturb selenium status through affecting SelP function, we investigated molecular mechanisms of lead on SelP in vitro. Results indicated that lead changed secondary structure of SelP by loosening and destruction its skeleton. This work presents molecular mechanisms changes of selenium status in mice livers caused by lead combined in vivo and in vitro studies, and contributes to a better understanding of lead toxicity on human health.
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Affiliation(s)
- Mengjiao Bi
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Hao Zhang
- Laboratory of Immunology for Environment and Health, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China; Hubei Provincial Key Laboratory of Occurrence and Intervention of Rhumatic Diseases, Hubei University for Nationalities, 39 Xueyuan Road, Enshi, China
| | - Lin Yuan
- Hubei Provincial Key Laboratory of Occurrence and Intervention of Rhumatic Diseases, Hubei University for Nationalities, 39 Xueyuan Road, Enshi, China
| | - Lining Zhao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China.
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Han F, Liu L, Lu J, Chai Y, Zhang J, Wang S, Sun L, Wang Q, Liu Y, He M, Mu W, Huang Z. Calculation of an Adequate Intake (AI) Value and Safe Range of Selenium (Se) for Chinese Infants 0-3 Months Old Based on Se Concentration in the Milk of Lactating Chinese Women with Optimal Se Intake. Biol Trace Elem Res 2019; 188:363-372. [PMID: 30014285 DOI: 10.1007/s12011-018-1440-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 07/10/2018] [Indexed: 01/13/2023]
Abstract
The required selenium intake for optimal health in Chinese residents was published in 2014. However, the adequate intake (AI) value for Chinese infants 0-3 months old is not established. This study assessed the current selenium nutritional status of 264 lactating Chinese women from three geographical locations with different Se levels (Liangshan in Sichuan province, Enshi in Hubei province, and Xicheng District in Beijing), to screen mothers with optimal Se intake, and to modify the AI value of Se for Chinese infants 0-3 months old. Milk and plasma Se concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) and glutathione peroxidase 3 (GPx3), and plasma selenoprotein P (SEPP1) was measured by ELISA. Daily Se intake (Y, μg/day) in lactating Chinese woman was calculated from plasma Se concentrations (X, μg/L) using the formula logY = 1.623 log(X) + 3.433. Plasma Se concentrations in lactating Chinese women were 78.19 ± 25.71, 112.48 ± 24.57, and 183.83 ± 45.81 μg/L from Se-deficient, Se-moderate, and seleniferous areas, respectively. Se intakes calculated from concentrations of plasma Se were 45.6 ± 21.69, 80.03 ± 27.69, and 223.10 ± 50.95 μg/day, respectively. An optimal dietary Se intake is not lower than the recommended nutrient intake (RNI) but not more than the tolerable upper intake level (UL). A range of 78-400 μg Se/day was defined as the optimal daily Se intake for lactating Chinese women. The percentages of mothers within this range in Sichuan, Beijing, and Enshi were 8.11, 45.13, and 6.06%, respectively. Based on milk Se concentrations of mothers with optimal daily Se intake, the adequate Se intake value and a safe range for Chinese infants 0-3 months of age were calculated as 15.29 and 8-35 μg Se/day, respectively. The Se status of Chinese lactating women has improved, particularly in traditionally Se-deficient and Se-toxic regions. A safe range for daily Se intake in Chinese infants may be regarded as a guideline for infant formula.
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Affiliation(s)
- Feng Han
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Liping Liu
- Beijing Municipal Center for Disease Prevention and Control, Beijing, 100013, China
| | - Jiaxi Lu
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Yingjuan Chai
- Maternal and Child Care Hospital of Xicheng District, Beijing, 100054, China
| | - Jie Zhang
- Center for Disease Control and Prevention of Enshi Autonomous Prefecture, Enshi, 445000, Hubei, China
| | - Shijin Wang
- Center for Disease Control and Prevention of Yi Autonomous Prefecture of Liangshan, Liangshan, 615000, Sichuan, China
| | - Licui Sun
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Qin Wang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Yiqun Liu
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Mengjie He
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Weipeng Mu
- Department of Genetics, Carolina Center for Genome Sciences, Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Zhenwu Huang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China.
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Falk M, Lebed P, Bernhoft A, Framstad T, Kristoffersen AB, Salbu B, Oropeza-Moe M. Effects of sodium selenite and L-selenomethionine on feed intake, clinically relevant blood parameters and selenium species in plasma, colostrum and milk from high-yielding sows. J Trace Elem Med Biol 2019; 52:176-185. [PMID: 30732879 DOI: 10.1016/j.jtemb.2018.12.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/29/2018] [Accepted: 12/14/2018] [Indexed: 12/18/2022]
Abstract
A field study in periparturient sows fed different dietary concentrations of either sodium selenite or L-selenomethionine (SeMet) was conducted to evaluate feed intake, haematological and biochemical parameters as well as to describe some key selenium (Se) species, namely selenoprotein P (SelP), selenoalbumin (SeAlb) and selenomethionine (SeMet) as well as total Se in plasma, colostrum and milk. Thirty-two sows were allotted to four treatments from 30 days (d) prepartum throughout on average a 32 d lactation period. Sodium selenite supplemented diets contained 0.40 and 0.60 mg Se/kg feed, while SeMet supplemented feed contained 0.26 and 0.43 mg Se/kg feed. Concentrations of sodium selenite and SeMet in complete feed exceeded the upper limits for total dietary Se and added organic Se, respectively, according to the European Union legislation. Blood samples were collected at initiation of the study, at farrowing and at weaning. Colostrum samples were collected at farrowing and milk samples at weaning. Se species were subjected to liquid chromatography, and total Se and Se species were determined using inductively coupled plasma mass spectrometry. The SeMet supplemented diets resulted in higher feed intake and in higher levels of total Se, SelP, SeAlb and SeMet in colostrum compared with sows fed sodium selenite. Similar results were obtained for levels of total Se and SeMet in milk at weaning. The higher dietary sodium selenite concentration in sows' feed did not increase the Se transfer into colostrum or milk when compared with those receiving the lower level of sodium selenite. However, the increase in serum-Zn from initiation until farrowing, observed in sows fed SeMet as well as the higher glutamate dehydrogenase activity in sodium selenite supplemented sows in this period might indicate a higher requirement of antioxidant defence in sodium selenite-supplemented sows. To our knowledge, the present data on Se species in plasma, colostrum and milk of sows represent the most complete investigation of Se in sows conducted to date. A higher amount of the above-mentioned Se species in the colostrum of sows supplemented with SeMet might strengthen the piglets' antioxidative system and passive immunity as well as improve their average daily weight gain. The higher feed intake in sows fed diets supplemented with SeMet is an interesting finding that warrants further investigation.
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Affiliation(s)
- Michaela Falk
- Norwegian Veterinary Institute, Kyrkjevegen 332/334, NO-4325, Sandnes, Norway; Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, NMBU, Kyrkjevegen 332/334, NO-4325, Sandnes, Norway.
| | - Pablo Lebed
- Faculty of Environmental Sciences and Nature Resource Management (MINA)/Centre for Environmental Radioactivity (CERAD) CoE, Ås, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, NO-1432, Ås, Norway.
| | - Aksel Bernhoft
- Norwegian Veterinary Institute, P.O. Box 750, Sentrum, NO-0106, Oslo, Norway.
| | - Tore Framstad
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Campus Adamstuen, NMBU, P.O. Box 8146 Dep., NO-0033, Oslo, Norway.
| | | | - Brit Salbu
- Faculty of Environmental Sciences and Nature Resource Management (MINA)/Centre for Environmental Radioactivity (CERAD) CoE, Ås, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, NO-1432, Ås, Norway.
| | - Marianne Oropeza-Moe
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, NMBU, Kyrkjevegen 332/334, NO-4325, Sandnes, Norway.
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Duarte GBS, Reis BZ, Rogero MM, Vargas-Mendez E, Júnior FB, Cercato C, Cozzolino SMF. Consumption of Brazil nuts with high selenium levels increased inflammation biomarkers in obese women: A randomized controlled trial. Nutrition 2019; 63-64:162-168. [PMID: 31026738 DOI: 10.1016/j.nut.2019.02.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/18/2019] [Accepted: 02/14/2019] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Increased inflammatory response is an important factor in the pathophysiology of obesity. The mineral selenium (Se), of which one of the main food sources is the Brazil nut, has important antioxidant and anti-inflammatory functions through the action of selenoproteins. Thus, the evaluation of the influence of this micronutrient in this context is of great relevance. The aim of this study was to evaluate the effects of Brazil nut intake with high Se concentrations on inflammatory biomarkers and its relation to Se status in obese women. METHODS A randomized controlled clinical trial was carried out with 55 women recruited at Clinical Hospital in São Paulo, Brazil. Patients were randomly assigned to either the Brazil nut group (BN) or the control group (CO) and followed up for 2 mo. The BN group consumed 1 unit/d of Brazil nuts (∼ 1261 μg/Se); the CO group did not receive any intervention. At baseline and after 2 mo, analysis of biochemical parameters related to Se status, oxidative stress, and inflammatory biomarkers were performed. RESULTS At baseline, both groups did not present Se deficiency. In the BN group, a significant increase (P < 0.05) in all Se biomarkers and in gene expression of several proinflammatory parameters (interleukin-6, tumor necrosis factor-α, and Toll-like receptors 2 and 4) were observed after the intervention period. No changes were observed for the CO group. CONCLUSION Although there were no changes in plasma inflammatory biomarkers levels, a significant increase in gene expression may be an indication of a proinflammatory stimulus in obesity, induced by the consumption of Brazil nuts with high Se levels.
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Affiliation(s)
- Graziela Biude Silva Duarte
- Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil.
| | - Bruna Zavarize Reis
- Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil
| | - Marcelo Macedo Rogero
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP, Research Innovation and Dissemination Centers São Paulo Research Foundation, São Paulo, Brazil
| | - Ernesto Vargas-Mendez
- Department of Biochemistry, School of Medicine, University of Costa Rica, Costa Rica
| | - Fernando Barbosa Júnior
- Department of Clinical, Toxicological and Bromatological Analysis, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Cintia Cercato
- Division of Endocrinology and Metabolism, Clinical Hospital, School of Medicine, University of São Paulo, São Paulo, Brazil
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Heller RA, Seelig J, Bock T, Haubruck P, Grützner PA, Schomburg L, Moghaddam A, Biglari B. Relation of selenium status to neuro-regeneration after traumatic spinal cord injury. J Trace Elem Med Biol 2019; 51:141-149. [PMID: 30466924 DOI: 10.1016/j.jtemb.2018.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/07/2018] [Accepted: 10/04/2018] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The trace element selenium (Se) is crucial for the biosynthesis of selenoproteins. Both neurodevelopment and the survival of neurons that are subject to stress depend on a regular selenoprotein biosynthesis and sufficient Se supply by selenoprotein P (SELENOP). HYPOTHESIS Neuro-regeneration after traumatic spinal cord injury (TSCI) is related to the Se status. STUDY DESIGN Single-centre prospective observational study. PATIENTS AND METHODS Three groups of patients with comparable injuries were studied; vertebral fractures without neurological impairment (n = 10, group C), patients with TSCI showing no remission (n = 9, group G0), and patients with remission developing positive abbreviated injury score (AIS) conversion within 3 months (n = 10, group G1). Serum samples were available from different time points (upon admission, and after 4, 9 and 12 h, 1 and 3 days, 1 and 2 weeks, and 1, 2 and 3 months). Serum trace element concentrations were determined by total reflection X-ray fluorescence, SELENOP by ELISA, and further parameters by laboratory routine. RESULTS Serum Se and SELENOP concentrations were higher on admission in the remission group (G1) as compared to G0. During the first week, both parameters remained constant in C and G0, whereas they declined significantly in the remission group. Similarly, the concentration changes between admission and 24 h were most pronounced in this group of recovering patients (G1). Binary logistic regression analysis including the delta of Se and SELENOP within the first 24 h indicated an AUC of 90.0% (CI: 67.4%-100.0%) with regards to predicting the outcome after TSCI. CONCLUSION A Se deficit might constitute a risk factor for poor outcome after TSCI. A dynamic decline of serum Se and SELENOP concentrations after admission may reflect ongoing repair processes that are associated with higher odds for a positive clinical outcome.
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Affiliation(s)
- Raban Arved Heller
- Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany
| | - Julian Seelig
- Institute for Experimental Endocrinology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Tobias Bock
- Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany
| | - Patrick Haubruck
- Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany
| | - Paul Alfred Grützner
- BG Trauma Centre Ludwigshafen, Department of Trauma Surgery and Orthopedics, Medical Director, Ludwigshafen, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
| | - Arash Moghaddam
- Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany
| | - Bahram Biglari
- BG Trauma Centre Ludwigshafen, Department of Paraplegiology, Ludwigshafen, Germany
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Zhang X, Wang T, Li S, Ye C, Hou J, Li Q, Liang H, Zhou H, Guo Z, Han X, Wang Z, Wu H, Gao X, Xu C, Zhen R, Chen X, Duan Y, Wang Y, Han S. A spatial ecological study of selenoprotein P and Keshan disease. J Trace Elem Med Biol 2019; 51:150-158. [PMID: 30466925 DOI: 10.1016/j.jtemb.2018.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 10/05/2018] [Accepted: 10/09/2018] [Indexed: 11/23/2022]
Abstract
Few spatial ecological studies on selenoprotein P (SePP) and Keshan disease (KD) have been reported. The main objective of this study is to investigate the relationships of SePP with KD, economic indicators and soil selenium and to visualize the evidence for KD precise prevention and control. An ecological study design was employed. The serum SePP of 2351 subjects living in rural areas, general cities and developed cities in 15 KD endemic provinces and 13 KD non-endemic provinces in China were measured. Spatial description and spatial analysis of SePP were conducted. The subjects were adults aged. The mean serum SePP level of KD endemic area residents was 14.20 mg/L, significantly lower than that in non-endemic areas, 15.30 mg/L (t = - 3.19, P = 0.0010). Serum SePP levels were low among the people in the KD endemic provinces of Shandong, Inner Mongolia, Heilongjiang, etc. The mean serum SePP level of the 2351 people was 15.04 (95% CI: 14.76 and 15.31) mg/L. The mean serum SePP levels of residents in developed cities, general cities and rural areas were 16.54 mg/L, 14.98 mg/L and 14.44 mg/L, respectively, and were significantly different (F = 17.00, P < 0.0010). Spatial regression analysis showed that the spatial distribution of SePP was positively correlated with per capita consumption expenditure and soil selenium. Selenium deficiency may still exist among residents living in the KD endemic provinces. Shandong, Inner Mongolia, and Heilongjiang should be the target provinces, visualized by spatial analysis, for KD precise prevention and control.
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Affiliation(s)
- Xiao Zhang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Tong Wang
- Department of Health Education, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Shie Li
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Chao Ye
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Jie Hou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Qi Li
- The Third Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Hong Liang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Huihui Zhou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Zhongying Guo
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Xiaomin Han
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Zhe Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Huan Wu
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Xiangzhi Gao
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Chunyan Xu
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Rongxia Zhen
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Xiangli Chen
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Yani Duan
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Yanan Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
| | - Shan Han
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, Harbin, China.
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Liu Y, Zhang W, Zhao J, Lin X, Liu J, Cui L, Gao Y, Zhang TL, Li B, Li YF. Selenoprotein P as the major transporter for mercury in serum from methylmercury-poisoned rats. J Trace Elem Med Biol 2018; 50:589-595. [PMID: 29704998 DOI: 10.1016/j.jtemb.2018.04.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 04/05/2018] [Accepted: 04/12/2018] [Indexed: 11/18/2022]
Abstract
Selenium (Se) has been found to promote weight gain, decrease hepatic damage, but redistribute mercury (Hg) in brains and livers in methylmercury (MeHg)-poisoned rats. The aims of the present work were to examine the effects of Se on the levels of Hg in serum and the role of serum selenoproteins in binding with Hg in MeHg-poisoned rats. The concentration of Se, Hg and MeHg were studied using ICP-MS and CVAFS. The Hg- and Se-binding selenoproteins were separated and quantified using affinity chromatography with post-column isotope dilution analysis using both enriched 78Se and 199Hg. It was found that Se treatment reduced Hg levels in serum in MeHg-poisoned rats. Among the three separated selenoproteins, the amounts of SelP-bound Hg and Se increased to 73% and 93.6%, from 64.4% and 89.3% of the total Hg and Se, respectively after Se treatment, suggesting that SelP acts as a major transporter for Hg and pool for Se in serum. Over 90% of the total Hg was MeHg in serum, and the molar ratios of MeHg to Se as 1:4 and 1:9 in the formed MeHg-Se-SelP complex in the control and the Se treatment group, respectively. The elevated Se level binding with SelP facilitated the Hg extraction from tissues and organs, as well as its redistribution in brains and livers through blood circulation in the MeHg-poisoned rats. Together, our findings provide direct evidence that serum SelP is the major Hg transporter in MeHg-poisoned rats.
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Affiliation(s)
- Yang Liu
- Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing, 100191, China; CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Institute of Basic Medical and Forensic Science, Baotou Medical College, Inner Mongolia University of Science& Technology, Baotou, 014010, China
| | - Wei Zhang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiating Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoying Lin
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiamei Liu
- Pingshang Branch, Linyi Animal Health Inspection, Linyi, 276624, China
| | - Liwei Cui
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuxi Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Tian-Lan Zhang
- Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing, 100191, China.
| | - Bai Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu-Feng Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
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Sunde RA, Zemaitis ET, Blink AB, Lawinger JA. Impact of Glutathione Peroxidase-1 (Gpx1) Genotype on Selenoenzyme and Transcript Expression When Repleting Selenium-Deficient Mice. Biol Trace Elem Res 2018; 186:174-184. [PMID: 29502249 DOI: 10.1007/s12011-018-1281-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/20/2018] [Indexed: 10/17/2022]
Abstract
Glutathione peroxidase (Gpx1) is the major selenoprotein in most tissues in animals. Knockout (KO) of Gpx1 decreases Gpx1 activity to near zero and substantially reduces liver selenium (Se) levels, but has no overt effects in otherwise healthy mice. To investigate the impact of deletion of Gpx1 on Se metabolism, Se flux, and apparent Se requirements, KO, Gpx1 heterozygous (Het), and Gpx1 wild-type (WT) mice were fed Se-deficient diet for 17 weeks, then repleted with graded levels of Se (0-0.3 μg Se/g as Na2SeO3) for 7 days, and selenoprotein activities and transcripts were determined in blood, liver, and kidney. Se deficiency decreased the activities of plasma Gpx3, liver Gpx1, liver Txnrd, and liver Gpx4 to 3, 0.3, 11, and 50% of WT Se-adequate levels, respectively, but the Gpx1 genotype had no effect on growth or changes in activity or expression of selenoproteins other than Gpx1. Se repletion increased selenoprotein transcripts to Se-adequate levels after 7 days; Se response curves and apparent Se requirements for selenoprotein transcripts were similar to those observed in studies starting with Se-adequate mice. With short-term Se repletion, selenoenzyme activities resulted in three Se response curve patterns: (1) liver and kidney Gpx1, Gpx4, and Txnrd activities were sigmoidal or hyperbolic with breakpoints (0.08-0.19 μg Se/g) that were double those observed in studies starting with Se-adequate mice; (2) red blood cell Gpx1 activity was not significantly changed; and (3) plasma Gpx3 activity only increased substantially with 0.3 μg Se/g. Plasma Gpx3 is secreted from kidney. In this short-term study, kidney Gpx3 mRNA reached plateau levels at 0.1 μg Se/g, and other kidney selenoenzyme activities reached plateau levels at ≤ 0.2 μg Se/g, so sufficient Se should have been present in kidney. Thus, the delayed increase in plasma Gpx3 activity suggests that newly synthesized and secreted kidney Gpx3 is preferentially retained in kidney or rapidly cleared by binding to basement membranes in kidney or in other tissues. This repletion study shows that loss of capacity to incorporate Se into Gpx1 in Gpx1 KO mice does not dramatically alter expression of other Se biomarkers, nor the short-term flux of Se from intestine to liver to kidney.
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Affiliation(s)
- Roger A Sunde
- Department of Nutritional Sciences, University of Wisconsin, 1415 Linden Drive, Madison, WI, 53706, USA.
| | - Edward T Zemaitis
- Department of Nutritional Sciences, University of Wisconsin, 1415 Linden Drive, Madison, WI, 53706, USA
| | - Andrew B Blink
- Department of Nutritional Sciences, University of Wisconsin, 1415 Linden Drive, Madison, WI, 53706, USA
| | - Julia A Lawinger
- Department of Nutritional Sciences, University of Wisconsin, 1415 Linden Drive, Madison, WI, 53706, USA
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Short SP, Pilat JM, Williams CS. Roles for selenium and selenoprotein P in the development, progression, and prevention of intestinal disease. Free Radic Biol Med 2018; 127:26-35. [PMID: 29778465 PMCID: PMC6168360 DOI: 10.1016/j.freeradbiomed.2018.05.066] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/09/2018] [Accepted: 05/16/2018] [Indexed: 02/07/2023]
Abstract
Selenium (Se) is a micronutrient essential to human health, the function of which is mediated in part by incorporation into a class of proteins known as selenoproteins (SePs). As many SePs serve antioxidant functions, Se has long been postulated to protect against inflammation and cancer development in the gut by attenuating oxidative stress. Indeed, numerous studies over the years have correlated Se levels with incidence and severity of intestinal diseases such as inflammatory bowel disease (IBD) and colorectal cancer (CRC). Similar results have been obtained with the Se transport protein, selenoprotein P (SELENOP), which is decreased in the plasma of both IBD and CRC patients. While animal models further suggest that decreases in Se or SELENOP augment colitis and intestinal tumorigenesis, large-scale clinical trials have yet to show a protective effect in patient populations. In this review, we discuss the function of Se and SELENOP in intestinal diseases and how research into these mechanisms may impact patient treatment.
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Affiliation(s)
- Sarah P Short
- Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, TN, USA; Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Jennifer M Pilat
- Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Christopher S Williams
- Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, TN, USA; Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA; Vanderbilt University School of Medicine, Vanderbilt University, Nashville, TN, USA; Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA; Veterans Affairs Tennessee Valley HealthCare System, Nashville, TN, USA.
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Solovyev N, Drobyshev E, Bjørklund G, Dubrovskii Y, Lysiuk R, Rayman MP. Selenium, selenoprotein P, and Alzheimer's disease: is there a link? Free Radic Biol Med 2018; 127:124-133. [PMID: 29481840 DOI: 10.1016/j.freeradbiomed.2018.02.030] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/18/2018] [Accepted: 02/22/2018] [Indexed: 12/13/2022]
Abstract
The essential trace element, selenium (Se), is crucial to the brain but it may be potentially neurotoxic, depending on dosage and speciation; Se has been discussed for decades in relation to Alzheimer's disease (AD). Selenoprotein P (SELENOP) is a secreted heparin-binding glycoprotein which serves as the main Se transport protein in mammals. In vivo studies showed that this protein might have additional functions such as a contribution to redox regulation. The current review focuses on recent research on the possible role of SELENOP in AD pathology, based on model and human studies. The review also briefly summarizes results of epidemiological studies on Se supplementation in relation to brain diseases, including PREADViSE, EVA, and AIBL. Although mainly positive effects of Se are assessed in this review, possible detrimental effects of Se supplementation or exposure, including potential neurotoxicity, are also mentioned. In relation to AD, various roles of SELENOP are discussed, i.e. as the means of Se delivery to neurons, as an antioxidant, in cytoskeleton assembly, in interaction with redox-active metals (copper, iron, and mercury) and with misfolded proteins (amyloid-beta and hyperphosphorylated tau-protein).
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Affiliation(s)
- Nikolay Solovyev
- St. Petersburg State University, Institute of Chemistry, St. Petersburg, Russian Federation.
| | - Evgenii Drobyshev
- Universität Potsdam, Institut für Ernährungswissenschaft, Potsdam, Germany
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway.
| | - Yaroslav Dubrovskii
- St. Petersburg State University, Institute of Chemistry, St. Petersburg, Russian Federation
| | - Roman Lysiuk
- Department of Pharmacognosy and Botany, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Margaret P Rayman
- Department of Nutritional Sciences, University of Surrey, Guildford, UK
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Seale LA, Ha HY, Hashimoto AC, Berry MJ. Relationship between selenoprotein P and selenocysteine lyase: Insights into selenium metabolism. Free Radic Biol Med 2018; 127:182-189. [PMID: 29567390 PMCID: PMC6148438 DOI: 10.1016/j.freeradbiomed.2018.03.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/14/2018] [Accepted: 03/18/2018] [Indexed: 10/17/2022]
Abstract
Selenoprotein P (SelenoP) functions as a plasma transporter of selenium (Se) from liver to other tissues via incorporation into multiple selenocysteine (Sec) residues. Selenocysteine lyase (Scly) is an intracellular enzyme that decomposes Sec into selenide, providing Se for the synthesis of new selenoproteins. Both SelenoP and Scly are mostly produced by the liver. Previous studies demonstrated that male mice lacking SelenoP (SelenoP KO) or Scly (Scly KO) had increased or decreased total hepatic Se, respectively. While SelenoP regulation by Se is well-studied, Scly regulation by Se has not been reported. We hypothesize that Scly is negatively regulated by Se levels, and that absence of SelenoP jeopardizes Scly-dependent Se recycling. Using in vitro and in vivo models, we unveiled a tissue-specific Se regulation of Scly gene expression. We also determined that SelenoP, a considered source of intracellular Se, affects Scly expression and activity in vitro but not in vivo, as in the absence of SelenoP, Scly levels and activity remain normal. We also showed that absence of SelenoP does not increase levels of transsulfuration pathway enzymes, which would result in available selenocompounds being decomposed by the actions of cystathionine γ-lyase (CGL or CTH) and cystathionine β-synthase (CBS). Instead, it affects levels of thioredoxin reductase 1 (Txnrd1), an enzyme that can reduce selenite to selenide to be used in selenoprotein production. This study evaluates a potential interplay between SelenoP and Scly, providing further insights into the regulation of selenium metabolism.
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Affiliation(s)
- Lucia A Seale
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96813, United States.
| | - Herena Y Ha
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96813, United States
| | - Ann C Hashimoto
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96813, United States
| | - Marla J Berry
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96813, United States
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Weigert C, Hoene M, Plomgaard P. Hepatokines-a novel group of exercise factors. Pflugers Arch 2018; 471:383-396. [PMID: 30338347 DOI: 10.1007/s00424-018-2216-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/28/2018] [Accepted: 10/03/2018] [Indexed: 01/24/2023]
Abstract
Regular physical activity not only improves the exercise capacity of the skeletal muscle performing the contractions, but it is beneficial for the whole body. An extensive search for "exercise factors" mediating these beneficial effects has been going on for decades. Particularly skeletal muscle tissue has been investigated as a source of circulating exercise factors, and several myokines have been identified. However, exercise also has an impact on other tissues. The liver is interposed between energy storing and energy utilising tissues and is highly active during exercise, maintaining energy homeostasis. Recently, a novel group of exercise factors-termed hepatokines-has emerged. These proteins (fibroblast growth factor 21, follistatin, angiopoietin-like protein 4, heat shock protein 72, insulin-like growth factor binding protein 1) are released from the liver and increased in the bloodstream during or in the recovery after an exercise bout. In this narrative review, we evaluate this new group of exercise factors focusing on the regulation and potential function in exercise metabolism and adaptations. These hepatokines may convey some of the beneficial whole-body effects of exercise that could ameliorate metabolic diseases, such as obesity or type 2 diabetes.
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Affiliation(s)
- Cora Weigert
- Division of Endocrinology, Diabetology, Angiology, Nephrology, Pathobiochemistry and Clinical Chemistry, Department of Internal Medicine IV, University of Tuebingen, Otfried-Mueller Str. 10, 72076, Tuebingen, Germany. .,Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich, University of Tuebingen, Tuebingen, Germany. .,German Center for Diabetes Research (DZD), Tuebingen, Germany.
| | - Miriam Hoene
- Division of Endocrinology, Diabetology, Angiology, Nephrology, Pathobiochemistry and Clinical Chemistry, Department of Internal Medicine IV, University of Tuebingen, Otfried-Mueller Str. 10, 72076, Tuebingen, Germany
| | - Peter Plomgaard
- The Centre of Inflammation and Metabolism, and the Centre for Physical Activity Research, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark. .,Department of Clinical Biochemistry, Rigshospitalet, Rigshospitalet, Blegdamsvej 9, DK-2100, Copenhagen, Denmark. .,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.
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