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Liu L, Luo P, Wen P, Xu P. Effects of selenium and iodine on Kashin-Beck disease: an updated review. Front Nutr 2024; 11:1402559. [PMID: 38757132 PMCID: PMC11096467 DOI: 10.3389/fnut.2024.1402559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 04/22/2024] [Indexed: 05/18/2024] Open
Abstract
Kashin-Beck disease (KBD) is an endochondral osteogenesis disorder characterised by epiphysis damage and secondary deformable arthropathy induced by multiple external factors, among which selenium (Se) and iodine deficiency are important influencing factors. Iodine deficiency is usually accompanied by a low Se content in the soil in the KBD areas of China. Se can reverse oxidative damage to chondrocytes. In addition, Se is related to the bone conversion rate and bone mineral density. Low Se will hinder growth and change bone metabolism, resulting in a decrease in the bone conversion rate and bone mineral density. Thyroid hormone imbalance caused by thyroid dysfunction caused by iodine deficiency can damage bone homeostasis. Compared with Se deficiency alone, Se combined with iodine deficiency can reduce the activity of glutathione peroxidase more effectively, which increases the vulnerability of chondrocytes and other target cells to oxidative stress, resulting in chondrocyte death. Clinical studies have shown that supplementation with Se and iodine is helpful for the prevention and treatment of KBD.
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Affiliation(s)
| | | | | | - Peng Xu
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi’an, China
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Yang R, Zheng R, Song J, Liu H, Yu S, Liu J. Speciation of Selenium Nanoparticles and Other Selenium Species in Soil: Simple Extraction Followed by Membrane Separation and ICP-MS Determination. Anal Chem 2024; 96:471-479. [PMID: 38116615 DOI: 10.1021/acs.analchem.3c04577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The application of selenium nanoparticle (SeNP)-based fertilizers can cause SeNPs to enter the soil environment. Considering the possible transformation of SeNPs and the species-dependent toxicity of selenium (Se), accurate analysis of SeNPs and other Se species present in the soil would help rationally assess the potential hazards of SeNPs to soil organisms. Herein, a novel method for speciation of SeNPs and other Se species in soil was established. Under the optimized conditions, SeNPs, selenite, selenate, and seleno amino acid could be simultaneously extracted from the soil with mixtures of tetrasodium pyrophosphate (5 mM) and potassium dihydrogen phosphate (1.2 μM), while inert Se species (mainly metal selenide) remained in the soil. Then, extracted SeNPs can be effectively captured by a nylon membrane (0.45 μm) and quantified by inductively coupled plasma mass spectrometry (ICP-MS). Other extracted Se species can be separated and quantified by high-performance liquid chromatography coupled with ICP-MS. Based on the difference between the total Se contents and extracted Se contents, the amount of metal selenide can be calculated. The limits of detection of the method were 0.02 μg/g for SeNPs, 0.05 μg/g for selenite, selenate, and selenocystine, and 0.25 μg/g for selenomethionine, respectively. Spiking experiments also showed that our method was applicable to real soil sample analysis. The present method contributes to understanding the speciation of Se in the soil environment and further estimating the occurrence and application risks of SeNPs.
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Affiliation(s)
- Rui Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ronggang Zheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiangyun Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Hao Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sujuan Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingfu Liu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
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Wu Y, Gong Y, Zhang Y, Li S, Wang C, Yuan Y, Lv X, Liu Y, Chen F, Chen S, Zhang F, Guo X, Wang X, Ning Y, Zhao H. Comparative Analysis of Gut Microbiota from Rats Induced by Se Deficiency and T-2 Toxin. Nutrients 2023; 15:5027. [PMID: 38140286 PMCID: PMC10745411 DOI: 10.3390/nu15245027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/23/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
The aim of this study was to analyze the differences in gut microbiota between selenium deficiency and T-2 toxin intervention rats. Knee joint and fecal samples of rats were collected. The pathological characteristics of knee cartilage were observed by safranin O/fast green staining. DNA was extracted from fecal samples for PCR amplification, and 16S rDNA sequencing was performed to compare the gut microbiota of rats. At the phylum level, Firmicutes (81.39% vs. 77.06%) and Bacteroidetes (11.11% vs. 14.85%) were dominant in the Se-deficient (SD) group and T-2 exposure (T-2) groups. At the genus level, the relative abundance of Ruminococcus_1 (12.62%) and Ruminococcaceae_UCG-005 (10.31%) in the SD group were higher. In the T-2 group, the relative abundance of Lactobacillus (11.71%) and Ruminococcaceae_UCG-005 (9.26%) were higher. At the species level, the high-quality bacteria in the SD group was Ruminococcus_1_unclassified, and Ruminococcaceae_UCG-005_unclassified in the T-2 group. Lactobacillus_sp__L_YJ and Lactobacillus_crispatus were the most significant biomarkers in the T-2 group. This study analyzed the different compositions of gut microbiota in rats induced by selenium deficiency and T-2 toxin, and revealed the changes in gut microbiota, so as to provide a certain basis for promoting the study of the pathogenesis of Kashin-Beck disease (KBD).
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Affiliation(s)
- Yifan Wu
- Department of Occupational and Environmental Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China; (Y.W.); (Y.Z.); (Y.L.); (F.C.)
| | - Yi Gong
- MED-X Institute, Center for Immunological and Metabolic Diseases, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China;
| | - Yu Zhang
- Department of Occupational and Environmental Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China; (Y.W.); (Y.Z.); (Y.L.); (F.C.)
| | - Shujin Li
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Chaowei Wang
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Yuequan Yuan
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Xi Lv
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Yanli Liu
- Department of Occupational and Environmental Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China; (Y.W.); (Y.Z.); (Y.L.); (F.C.)
| | - Feihong Chen
- Department of Occupational and Environmental Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China; (Y.W.); (Y.Z.); (Y.L.); (F.C.)
| | - Sijie Chen
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Feiyu Zhang
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Xiong Guo
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
- Clinical Research Center for Endemic Disease of Shaanxi Province, The Second Affiliated Hospital of Xi’an Jiaotong University, No.157 Xi Wu Road, Xi’an 710004, China
| | - Xi Wang
- Department of Occupational and Environmental Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China; (Y.W.); (Y.Z.); (Y.L.); (F.C.)
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi’an 710061, China
| | - Yujie Ning
- Key Laboratory of Trace Elements and Endemic Diseases, School of Public Health, Xi’an Jiaotong University Health Science Center, National Health and Family Planning Commission, Xi’an 710061, China; (S.L.); (C.W.); (Y.Y.); (X.L.); (S.C.); (F.Z.); (X.G.)
| | - Hongmou Zhao
- Foot and Ankle Surgery Department, Honghui Hospital of Xi’an Jiaotong University, Xi’an 710001, China
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Pang K, Hao L, Yang S, Ren Z, Luo K. Hydrochemical characteristics and water quality assessment of natural water in the South China Mountains: the case in Lianzhou. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:9837-9853. [PMID: 37864616 DOI: 10.1007/s10653-023-01766-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 09/20/2023] [Indexed: 10/23/2023]
Abstract
South China Mountain Region has a well-developed water system with the most abundant water in China. Untreated natural water is the main source of drinking water for the local people. This study aimed to investigate the hydrochemical characteristics and trace element concentrations of natural water in the mountainous regions of South China. In this study, 116 water samples were collected. Traditional hydrochemical methods, water quality index (WQI), hazard index (HI), and nutrient speciation of trace elements (NSTE) were used for analysis. In general, the hydrochemical type was mainly Ca-HCO3- type. The hydrochemical characteristics were mainly influenced by the weathering of calcite and silicate rocks. Overall total dissolved solids (TDS) were low, indicating mainly soft and very soft water. The water that met the standards for mineral water had an average concentration of 59.69 mg/L for Sr (strontium) and an average concentration of 0.46 mg/L for H2SiO3 (silicic acid). Although the water quality index (WQI) indicated that 91.3% of the water samples in the study area were of good quality (WQI < 25), 2.58% of the water samples had significant non-carcinogenic risk (HI > 1) due to the high As and Pb concentrations. The water in the study area contributed significantly to human intake of Sr, Cr, and V, accounting for 8.4, 8.3, and 7.7% of the required daily intake for adults, respectively. It is recommended that a comprehensive water quality evaluation system be constructed to ensure that mountain water is managed for development and safe to drink.
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Affiliation(s)
- Kuo Pang
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Litao Hao
- College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Sujiao Yang
- School of Geosciences and Surveying Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Zhiyuan Ren
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
| | - Kunli Luo
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
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Liu J, Shi L, Ma X, Jiang S, Hou X, Li P, Cheng Y, Lv J, Li S, Ma T, Han B. Characterization and anti-inflammatory effect of selenium-enriched probiotic Bacillus amyloliquefaciens C-1, a potential postbiotics. Sci Rep 2023; 13:14302. [PMID: 37652982 PMCID: PMC10471622 DOI: 10.1038/s41598-023-40988-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/19/2023] [Indexed: 09/02/2023] Open
Abstract
A patented strain of Bacillus amyloliquefaciens C-1 in our laboratory could produce functional sodium selenite (Na2SeO3) under optimized fermentation conditions. With the strong stress resistance and abundant secondary metabolites, C-1 showed potential to be developed as selenium-enriched postbiotics. C-1 has the ability to synthesize SeNPs when incubated with 100 μg/ml Na2SeO3 for 30 h at 30 °C aerobically with 10% seeds-culture. The transformation rate from Na2SeO3 into SeNPs reached to 55.51%. After selenium enrichment, there were no significant morphology changes in C-1 cells but obvious SeNPs accumulated inside of cells, observed by scanning electron microscope and transmission electron microscope, verified by energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. SeNPs had antioxidant activity in radical scavenge of superoxide (O2-), Hydroxyl radical (OH-) and 1,1-diphenyl-2-picryl-hydrazine (DPPH), where scavenging ability of OH- is the highest. Selenium-enriched C-1 had obvious anti-inflammatory effect in protecting integrity of Caco-2 cell membrane destroyed by S. typhimurium; it could preventing inflammatory damage in Caco-2 stressed by 200 μM H2O2 for 4 h, with significantly reduced expression of IL-8 (1.687 vs. 3.487, P = 0.01), IL-1β (1.031 vs. 5.000, P < 0.001), TNF-α (2.677 vs. 9.331, P < 0.001), increased Claudin-1 (0.971 vs. 0.611, P < 0.001) and Occludin (0.750 vs. 0.307, P < 0.001). Transcriptome data analysis showed that there were 381 differential genes in the vegetative growth stage and 1674 differential genes in the sporulation stage of C-1 with and without selenium-enrichment. A total of 22 ABC transporter protein-related genes at vegetative stage and 70 ABC transporter protein-related genes at sporulation stage were founded. Genes encoding MsrA, thiol, glutathione and thioredoxin reduction were significantly up-regulated; genes related to ATP synthase such as atpA and atpD genes showed down-regulated during vegetative stage; the flagellar-related genes (flgG, fliM, fliL, and fliJ) showed down-regulated during sporulation stage. The motility, chemotaxis and colonization ability were weakened along with synthesized SeNPs accumulated intracellular at sporulation stage. B. amyloliquefaciens C-1 could convert extracellular selenite into intracellular SeNPs through the oxidation-reduction pathway, with strong selenium-enriched metabolism. The SeNPs and selenium-enriched cells had potential to be developed as nano-selenium biomaterials and selenium-enriched postbiotics.
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Affiliation(s)
- Jin Liu
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Lu Shi
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Xinxin Ma
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Sijin Jiang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Xinyao Hou
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Pu Li
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Yue Cheng
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Jia Lv
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Shaoru Li
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Tianyou Ma
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China.
| | - Bei Han
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China.
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Chen P, Shaghaleh H, Hamoud YA, Wang J, Pei W, Yuan X, Liu J, Qiao C, Xia W, Wang J. Selenium-Containing Organic Fertilizer Application Affects Yield, Quality, and Distribution of Selenium in Wheat. Life (Basel) 2023; 13:1849. [PMID: 37763253 PMCID: PMC10532816 DOI: 10.3390/life13091849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
This study was designed to investigate the effect on wheat yield of applying organic fertilizers (OF) with five different selenium (Se) concentrations. The mineral nutrients, cadmium (Cd) content, and the distribution of Se in wheat plants were also measured. The results showed that wheat yields reached a maximum of 9979.78 kg ha-1 in Mengcheng (MC) County and 8868.97 kg ha-1 in Dingyuan (DY) County, Anhui Province, China when the application amount of selenium-containing organic fertilizer (SOF) was up to 600 kg ha-1. Among the six mineral nutrients measured, only the calcium (Ca) content of the grains significantly increased with an increase in the application amount of SOF in the two regions under study. Cd content showed antagonistic effects with the Se content of wheat grains, and when the SOF was applied at 1200 kg ha-1, the Cd content of the grains was significantly reduced by 30.1% in MC and 67.3% in DY, compared with under the Se0 treatment. After application of SOF, the Se content of different parts of the wheat plant ranked root > grain > spike-stalk > glume > leaf > stem. In summary, SOF application at a suitable concentration could increase wheat yields and significantly promote the Ca content of the grains. Meanwhile, the addition of Se effectively inhibited the level of toxic Cd in the wheat grains.
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Affiliation(s)
- Peng Chen
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Hiba Shaghaleh
- College of Environment, Hohai University, Nanjing 210098, China;
| | - Yousef Alhaj Hamoud
- College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China;
| | - Jing Wang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Wenxia Pei
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Xianfu Yuan
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Jianjian Liu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Cece Qiao
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Wenhui Xia
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
| | - Jianfei Wang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233030, China; (P.C.); (J.W.); (W.P.); (X.Y.); (J.L.); (C.Q.); (W.X.)
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Godebo TR, Stoner H, Kodsup P, Stoltzfus M, Nyachoti S, Atkins S, Jeuland M. Selenium in drinking water and cereal grains, and biomarkers of Se status in urine and fingernails of the Main Ethiopian Rift Valley population. J Trace Elem Med Biol 2023; 77:127137. [PMID: 36773555 DOI: 10.1016/j.jtemb.2023.127137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 01/24/2023] [Accepted: 01/25/2023] [Indexed: 01/28/2023]
Abstract
BACKGROUND Selenium (Se) plays an important role in human health, yet Se overexposure or deficiency can lead to deleterious health effects. This study aims to determine the concentration of Se in drinking water and staple cereal grain (maize, wheat, and teff) samples from the Main Ethiopian Rift (MER) Valley, and correspondingly, assesses Se biomarkers and their status as measured in the urine and fingernails of 230 individuals living in 25 MER communities. METHOD The concentration of Se in drinking water and cereal grain (maize, wheat, and teff) samples, and urine and fingernail samples were measured using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Demographic, anthropometric, and elemental concentrations were described by their quartiles and mean ± standard deviations. The 5th and 95th percentiles were used to describe the concentrations Se biomarkers ranges. The Se biomarker distributions in different study communities were further characterized according to Se levels found in drinking water, sex, and age using ANOVA, and multivariate regression. We conducted a correlation analysis (with Pearson correlation coefficient) and fitted a regression to evaluate the associations between these variables. RESULTS The mean concentration of Se in the drinking water samples was 0.66 (range: 0.015-2.64 µg/L; n = 25), and all samples were below the threshold value of 10 μg/L for Se in drinking water set by the World Health Organiation (WHO). In Ethiopia, most rural communities rely on locally produced cereal grains. We found mean Se concentrations (µg/kg) of 357 ± 190 (n = 14), 289 ± 123 (n = 14), and 145 ± 100 (n = 14) in wheat, teff, and maize, respectively. Furthermore, Se concentrations in drinking water showed no significant correlation with biomarker measures, indicating that the primary source of dietary Se is likely from local foods including staple grains. The mean±SD (5th-95th percentiles) of Se concentrations in fingernails and urine among study subjects were 1022 ± 320 (624-1551 µg/kg), and 38 ± 30 (1.9-100 µg/L), respectively. CONCLUSION A sizeable share of study participants (31%) fell below the lower limits of what is considered the currently accepted Se range of 20-90 µg/L in urine, though relatively few (only 4%) had similarly low fingernail levels. On the other hand, none of the samples reached Se toxicity levels, and the biomarker levels in this study are comparable to results from other studies that find adequate Se. Our results show that Se toxicity or deficiency is unlikely in the study population.
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Affiliation(s)
- Tewodros Rango Godebo
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Hannah Stoner
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Pornpimol Kodsup
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Mikaela Stoltzfus
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Syprose Nyachoti
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Sydney Atkins
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Marc Jeuland
- Sanford School of Public Policy and Duke Global Health Institute, Duke University, Durham, NC 27708, USA
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Tangjaidee P, Swedlund P, Xiang J, Yin H, Quek SY. Selenium-enriched plant foods: Selenium accumulation, speciation, and health functionality. Front Nutr 2023; 9:962312. [PMID: 36815133 PMCID: PMC9939470 DOI: 10.3389/fnut.2022.962312] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 09/13/2022] [Indexed: 02/09/2023] Open
Abstract
Selenium (Se) is an essential element for maintaining human health. The biological effects and toxicity of Se compounds in humans are related to their chemical forms and consumption doses. In general, organic Se species, including selenoamino acids such as selenomethionine (SeMet), selenocystine (SeCys2), and Se-methylselenocysteine (MSC), could provide greater bioactivities with less toxicity compared to those inorganics including selenite (Se IV) and selenate (Se VI). Plants are vital sources of organic Se because they can accumulate inorganic Se or metabolites and store them as organic Se forms. Therefore, Se-enriched plants could be applied as human food to reduce deficiency problems and deliver health benefits. This review describes the recent studies on the enrichment of Se-containing plants in particular Se accumulation and speciation, their functional properties related to human health, and future perspectives for developing Se-enriched foods. Generally, Se's concentration and chemical forms in plants are determined by the accumulation ability of plant species. Brassica family and cereal grains have excessive accumulation capacity and store major organic Se compounds in their cells compared to other plants. The biological properties of Se-enriched plants, including antioxidant, anti-diabetes, and anticancer activities, have significantly presented in both in vitro cell culture models and in vivo animal assays. Comparatively, fewer human clinical trials are available. Scientific investigations on the functional health properties of Se-enriched edible plants in humans are essential to achieve in-depth information supporting the value of Se-enriched food to humans.
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Affiliation(s)
- Pipat Tangjaidee
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Peter Swedlund
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Jiqian Xiang
- Enshi Autonomous Prefecture Academy of Agriculture Sciences, Enshi, Hubei, China
| | - Hongqing Yin
- Enshi Autonomous Prefecture Academy of Agriculture Sciences, Enshi, Hubei, China
| | - Siew Young Quek
- Food Science, School of Chemical Sciences, University of Auckland, Auckland, New Zealand,Riddet Institute New Zealand Centre of Research Excellence in Food, Palmerston North, New Zealand,*Correspondence: Siew Young Quek,
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Yang F, Zhang H, Xie S, Wei C, Yang X. Concentrations of heavy metals in water, sediments and aquatic organisms from a closed realgar mine. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:4959-4971. [PMID: 35976583 DOI: 10.1007/s11356-022-22563-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/11/2022] [Indexed: 06/18/2023]
Abstract
Mining activities can result in severe heavy metal contamination in freshwater ecosystems and lead to significant health risks. In this study, eight heavy metal concentrations in the water, sediments and aquatic organisms, including eighteen fish species, two shrimp species, one crab species and one amphibian frog species of the abandoned Shimen Realgar Mine area, were analysed. The results showed that most of the heavy metals detected in water, sediments and fish from the mine area were at relatively high levels, and historical realgar mining activities were a major source of arsenic (As) contamination in this area. We concluded that heavy metal bioaccumulation is species- and tissue-specific and is different for each element and sampling site. The concentration of heavy metals in fish was generally lower than that of the other aquatic organism species; these concentrations varied among different species with different feeding habits and habitats. The study showed that heavy metal concentrations were lower in muscle tissue than in other tissues (e.g. liver, skin, exoskeleton). A significant positive correlation between the As concentrations in sediment and fish was observed, indicating that sediment is an important factor affecting As accumulation in fish; thus, for fish protection, controlling the sources of water and sediment contamination is essential. Furthermore, the estimated daily intake (EDI) of all metals was acceptable, and the corresponding target hazard quotient (THQ) and total target hazard quotient (TTHQ) values were less than 1; hence, there was no serious health risk through fish consumption in this area.
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Affiliation(s)
- Fen Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
| | - Huan Zhang
- Sino-Japan Friendship Center for Environmental Protection, Beijing, China
| | - Shaowen Xie
- School of Environmental and Chemical Engineering, Foshan University, Foshan, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, China
| | - Chaoyang Wei
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Xiao Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
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Yang R, Li Q, Zhou W, Yu S, Liu J. Speciation Analysis of Selenium Nanoparticles and Inorganic Selenium Species by Dual-Cloud Point Extraction and ICP-MS Determination. Anal Chem 2022; 94:16328-16336. [DOI: 10.1021/acs.analchem.2c03018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Rui Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing100085, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Qingcun Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing100085, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Wenjing Zhou
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing100085, China
| | - Sujuan Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing100085, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Jingfu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing100085, China
- University of Chinese Academy of Sciences, Beijing100049, China
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Ni X, Yang R, Xu Y, Peng Y, Zhang J, Long J, Yan H. Distribution and Interactive Effects of Heavy Metals in Soil-Maize (Zea Mays L.) System in the Mercury Mining Area, Southwestern China. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:727-734. [PMID: 36222879 DOI: 10.1007/s00128-022-03615-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
The concentrations and interactive effects of beneficial elements (i.e., Se, Mo, and Zn) and heavy metals (As, Cd, Hg, and Pb) of maize (Zea mays L.) grown on lime soil and/or soil with mercury tailing were investigated in this study. The results show that the concentrations of heavy metals (i.e., As, Hg, and Pb) in soil with tailing were higher than those in lime soil. The concentrations of beneficial elements (i.e., Mo and Zn) in maize grown on soil with tailing were higher than those of maize grown on lime soil. The mean concentrations of Se, Mo, and Zn in maize grown on soil with tailing were 3.67 mg/kg, 0.530 mg/kg, and 27.4 mg/kg. The pH and an antagonistic effect played an important role in the concentrations of Mo and Zn in maize. The Se concentration in maize was controlled by the planting media.
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Affiliation(s)
- Xinran Ni
- College of Resource and Environmental Engineering, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Ruidong Yang
- College of Resource and Environmental Engineering, Guizhou University, 550025, Guiyang, China.
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, 550025, Guiyang, China.
| | - Yiyuan Xu
- College of Resource and Environmental Engineering, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, 550025, Guiyang, China
| | - Yishu Peng
- College of Tea Science, Guizhou University, 550025, Guiyang, China
| | - Jian Zhang
- College of Environmental Science and Engineering, Yangzhou University, 225127, Yangzhou, China
| | - Jie Long
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, 100012, Beijing, China
| | - Huiqin Yan
- College of Resource and Environmental Engineering, Guizhou University, 550025, Guiyang, China
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, 550025, Guiyang, China
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Zhang J, Falandysz J, Hanć A, Lorenc W, Wang Y, Barałkiewicz D. Occurrence, distribution, and associations of essential and non-essential elements in the medicinal and edible fungus "Fuling" from southern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 831:155011. [PMID: 35381245 DOI: 10.1016/j.scitotenv.2022.155011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/28/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
In Asian countries, the sclerotia of the wild-grown fungus Pachyma hoelen ("Fuling"), have been used as food and as medicinal products for centuries. To close the knowledge gaps about the value and possible environmental impacts, the occurrence, distribution, and associations of a range of elements (Ag, Al, As, Ba, Cd, Co, Cr, Cs, Cu, Li, Mg, Mn, Ni, Pb, Rb, Sb, Sr, Tl, U, V, and Zn) were studied in the inner (core) and outer (shell) morphological parts of the sclerotia from a diverse collection in Southern China. Quality of forest and agricultural soil in terms of a geogenic element source and composition can be considered as the main factor determining the occurrence of minerals in sclerotia through the host wood, largely of Pinus yunnanensis, while the anthropogenic impact (basically at remote rural areas of cultivation) in Southern China was negligible. In general, the mean concentration of each element in the outer part was significantly higher than that in the inner part (t-test, p < 0.01), except for Ag. The concentration of a given element in the outer part tended to have a positive relationship with that in the inner part, except for Cu, Se, Ag, and Zn. The elements in different morphological parts of sclerotia present different relation patterns. Compared to the outer part, there were stronger associations of elements in the inner part, suggesting homeostatic regulation of multiple elements in the inner parts. Further study on the sclerotia, infected wood substrate, and surrounding soil from a range of wild sample collections and intentional cultivation should provide a more complex view and allow assessment of the relationship between minerals and bioactive organic compounds produced by P. hoelen.
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Affiliation(s)
- Ji Zhang
- Medicinal Plants Research Institute, Yunnan Academy of Agricultural Sciences, 2238 Beijing Road, Panlong District, 650200 Kunming, China.
| | - Jerzy Falandysz
- Medical University of Łodz, Faculty of Pharmacy, Department of Toxicology, 1 Muszyńskiego Street, 90-151 Łódź, Poland.
| | - Anetta Hanć
- Adam Mickiewicz University, Department of Trace Analysis, Uniwersytetu Poznańskiego 8, PL 61-614 Poznań, Poland
| | - Wiktor Lorenc
- Adam Mickiewicz University, Department of Trace Analysis, Uniwersytetu Poznańskiego 8, PL 61-614 Poznań, Poland
| | - Yuanzhong Wang
- Medicinal Plants Research Institute, Yunnan Academy of Agricultural Sciences, 2238 Beijing Road, Panlong District, 650200 Kunming, China
| | - Danuta Barałkiewicz
- Adam Mickiewicz University, Department of Trace Analysis, Uniwersytetu Poznańskiego 8, PL 61-614 Poznań, Poland
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13
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Zhang WD, Li Y, Wang K, Yue Y, Tie M, Gu XJ, Xue YL. Effect of different ionic liquids and organic solvents on the structural and physicochemical properties of cellulose-protein complexes extracted from Se-enriched peanut leaves. Int J Biol Macromol 2022; 217:171-179. [PMID: 35835299 DOI: 10.1016/j.ijbiomac.2022.07.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/28/2022] [Accepted: 07/07/2022] [Indexed: 11/15/2022]
Abstract
Abundant cellulose and insoluble protein were contained in the Se-enriched peanut leaf residue, a by-product from leaf protein extraction. Ionic liquids (ILs) were used to extract the cellulose-protein complexes (CPCs) from Se-enriched peanut leaf residue. The effects of various ILs as extractants and organic solvents as regenerant on the physicochemical properties of CPCs were compared. The results showed that the yield of CPCs and recovery yield of [AMIM]Cl (1-allyl-3-methylimidazole chloride) were better than those of [BMIM]Cl (1-butyl-3-methylimidazolium chloride). Simultaneously, it could be seen from the infrared absorption peaks and secondary structure fitting results that [BMIM]Cl seemed stronger than [AMIM]Cl in destroying the secondary structure of CPCs. Scanning electron microscope (SEM) showed that the CPCs extracted by [BMIM]Cl were lamellate with holes on the surface, and the CPCs extracted by [AMIM]Cl were rough, almost without holes on the surface. Furthermore, the transmittance and tensile strength of the film which contained BA-CPC ([BMIM]Cl as extractant and acetonitrile as regenerant) film were better than those contained AA-CPC ([AMIM]Cl as extractant and acetonitrile as regenerant) film, which might be mainly because the types of ILs and regenerants affect the particle size of CPCs, thereby influencing the mechanical properties of the film.
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Affiliation(s)
- Wei-Dong Zhang
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Yan Li
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Ke Wang
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Ye Yue
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Mei Tie
- College of Environment, Liaoning University, Shenyang 110036, PR China
| | - Xue-Jun Gu
- Institute of Rare and Scattered Elements, Liaoning University, Shenyang 110036, PR China
| | - You-Lin Xue
- College of Light Industry, Liaoning University, Shenyang 110036, PR China.
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Ning Y, Hu M, Chen S, Zhang F, Yang X, Zhang Q, Gong Y, Huang R, Liu Y, Chen F, Pei L, Guo X, Kang L, Wang X, Zhang Y, Wang X. Investigation of selenium nutritional status and dietary pattern among children in Kashin-Beck disease endemic areas in Shaanxi Province, China using duplicate portion sampling method. ENVIRONMENT INTERNATIONAL 2022; 164:107255. [PMID: 35561595 DOI: 10.1016/j.envint.2022.107255] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND AND OBJECTIVES Selenium deficiency is a primary risk factor of Kashin-Beck disease (KBD). This study aimed to investigate whether children in endemic areas could maintain sufficient selenium intake after termination of selenium supplement administration, and evaluate their comprehensive nutritional status and dietary structure. METHODS Duplicate portion sampling combined with a questionnaire was adopted to collect data on categories and quantity of all food ingested in three consecutive days. Occipital hair was also collected to detect selenium content by hydride generation atomic fluorescence spectrometry (HGAFS). CDGSS3.0 software and factor analysis were integrated to assess the children's comprehensive nutritional status and dietary structure. RESULTS This study included 240 sex-matched (1:1) children aged 7-12 years from KBD endemic (n = 120) and non-endemic (n = 120) areas. Overall, 720 solid food, 720 liquid, and 240 hair samples were collected for selenium determination. The mean selenium level in hair of children in endemic areas (0.38 ± 0.16 mg/kg) was significantly lower than that in children in non-endemic areas (0.56 ± 0.28 mg/kg, Z = -5.249, p < 0.001). The dietary selenium intake of children in endemic areas was 40.0% lower than that in children in non-endemic areas (Z = -9.374, p < 0.001). Children in endemic areas consumed significantly less diverse dietary items leading to significantly less intake of multiple nutrients compared to children in non-endemic areas. CONCLUSIONS The dietary selenium intake of most children in endemic areas was less than the recommended amount. The dietary structure of children was undiversified, which limited the intake of multiple nutrients. Therefore, comprehensive nutrition rather than sole selenium intake should be the primary concern in the future.
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Affiliation(s)
- Yujie Ning
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China
| | - Minhan Hu
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China
| | - Sijie Chen
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China
| | - Feiyu Zhang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China
| | - Xiaodong Yang
- Shaanxi Provincial Institute for Endemic Disease Prevention and Control, Xi'an 710003, PR China.
| | - Qingping Zhang
- Shaanxi Provincial Institute for Endemic Disease Prevention and Control, Xi'an 710003, PR China
| | - Yi Gong
- Department of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Ruitian Huang
- Department of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Yanli Liu
- Department of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Feihong Chen
- Department of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Leilei Pei
- Department of Epidemiology and Health Statistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Xiong Guo
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China.
| | - Lianke Kang
- Center for Disease Control and Prevention of Qishan, Baoji 722400, PR China
| | - Xinyi Wang
- Center for Disease Control and Prevention of Hantai, Hanzhong 723000, PR China
| | - Yan Zhang
- Center for Disease Control and Prevention of Ningshan, Ankang 711699, PR China
| | - Xi Wang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Key Laboratory of Trace Elements and Endemic Diseases, Collaborative Innovation Center of Endemic Disease and Health Promotion for Silk Road Region, 710061, PR China; Department of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
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