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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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Long Z, Yuan L, Hou Y, Bañuelos GS, Liu Y, Pan L, Liu X, Yin X. Spatial variations in soil selenium and residential dietary selenium intake in a selenium-rich county, Shitai, Anhui, China. J Trace Elem Med Biol 2018; 50:111-116. [PMID: 30262267 DOI: 10.1016/j.jtemb.2018.06.019] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/30/2018] [Accepted: 06/19/2018] [Indexed: 10/28/2022]
Abstract
Shitai, a selenium (Se)-rich county in Anhui, China, has been reported for its resident longevity in the last 20 years. A recent survey by the Anhui Bureau of Geological Survey showed that soil Se contents in the Shitai area ranged from 0.05 to 51.20 mg/kg, with an average of 0.56 mg/kg. To explore the potential relationship between longevity and natural-occurring Se contents in Shitai county, Se concentrations were determined in Shitai's food chain (including soils and foods) and the daily Se intakes and hair Se contents were calculated for the residents. In the present study, 33 soil samples, 66 food samples and 82 hair samples were randomly collected from field sites, local food markets and male and female residents in downtown Shitai and in four nearby villages (Dashan, Xianyu, Yongfu and Yuantou). The total Se contents in all samples and the levels of water soluble, exchangeable, acid soluble, organic bound and residual Se in soil samples were determined with hydride generation - atomic fluorescence spectrometry. The total Se contents in soils ranged from 227 to 2603 μg/kg, with the averages of 1607 ± 242 μg/kg in Dashan, 1149 ± 118 μg/kg in Xianyu, 521 ± 157 μg/kg in Yongfu, and 363 ± 140 μg/kg in Yuantou. The soil bioavailable Se content (soluble and exchangeable Se) in Dashan was highest (14.98%), followed by Xianyu (13.69%), Yongfu (13.18%) and Yuantou (9.38%). For food samples, the highest Se concentration of grains was 468.5 μg/kg in Dashan, while lowest was observed in downtown (41.7 μg/kg). The estimated daily Se intake of residents in Dashan reached 298.4 μg/d/adult, which is about 5 times higher than the recommend nutrient intake in China (60 μg/d/adult), and 6-10 times higher than the levels observed in Xianyu (47.6 μg/d/adult), Yuantou (46.1 μg/d/adult), Yongfu (40.0 μg/d/adult), and downtown (30.0 μg/d/adult). Although hair Se contents in Dashan (male: 709.2 μg/kg; female: 589.2 μg/kg) were significantly higher than those at the other study sites, no significant relationships between daily Se intakes and hair Se contents were observed. The present study demonstrated that Se levels in soils, foods, resident dietary intake and human hairs in Shitai County varied significantly; therefore, the region could be a unique field site to study the direct relationship between Se and human health.
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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; Advanced Lab for Functional Agriculture, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, Jiangsu, China
| | - Linxi Yuan
- Jiangsu Bio-Engineering Research Center of Selenium, Suzhou 215123, Jiangsu, China
| | - Yuzhu Hou
- Anhui Academy of Inspection & Quarantine Technology, Hefei 230026, Anhui, China
| | - Gary S Bañuelos
- USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, 9611 S. Riverbend Ave., Parlier CA 93648-9757, United States
| | - Yongxian Liu
- Institute of Agricultural Resource and Environment, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Liping Pan
- Institute of Agricultural Resource and Environment, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Xiaodong Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, 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 for Advanced Study, University of Science and Technology of China, Suzhou 215123, Jiangsu, China; Jiangsu Bio-Engineering Research Center of Selenium, Suzhou 215123, Jiangsu, China.
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Hu XF, Sharin T, Chan HM. Dietary and blood selenium are inversely associated with the prevalence of stroke among Inuit in Canada. J Trace Elem Med Biol 2017; 44:322-330. [PMID: 28965595 DOI: 10.1016/j.jtemb.2017.09.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 07/10/2017] [Revised: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 01/14/2023]
Abstract
Inuit in Canada have high selenium intake from the consumption of country food such as fish and marine mammals. The health consequence is not known. This study examines the association between blood selenium concentration and prevalence of stroke among Canadian Inuit. The International Polar Year Inuit Health Survey was conducted in 2007-2008. Among the 2077 adults participants (≥18years old) who completed a questionnaire and gave blood samples, 49 stroke cases were reported, 31 of which were from women. The crude prevalence of stroke was 2.4% in the participants. Participants with stroke had lower blood selenium (geometric mean: 260μg/L vs. 319μg/L) and dietary selenium (144μg/day vs. 190μg/day) compared to individuals without stroke. Participants with high blood/dietary selenium exposure (quartiles 3 and 4) had a lower prevalence of stroke compared to those with low selenium exposure (quartile 1). The adjusted odds ratio ranged from 0.09 to 0.25 among subgroups (e.g. age, sex, and blood mercury). An L-shaped relationship between prevalence of stroke with blood and dietary selenium was observed, based on the cubic restricted spline and segmented regression analyses. The estimated turning points of the L-shaped curve for blood selenium and dietary selenium were 450μg/L and 350μg/day, respectively. Below the turning points, it was estimated that each 50-μg/L increase in blood selenium was associated with a 38% reduction in the prevalence of stroke, and each 50-μg/day increase in dietary selenium was associated with a 30% reduction in the prevalence of stroke. In conclusion, blood and dietary selenium are reversely associated with the prevalence of stroke in Inuit, which follows an L-shaped relationship. Whether this relationship applies to other population needs further investigation.
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Affiliation(s)
- Xue Feng Hu
- Department of Biology, University of Ottawa, Ottawa, K1N 6N5, ON, Canada
| | - Tasnia Sharin
- Department of Biology, University of Ottawa, Ottawa, K1N 6N5, ON, Canada
| | - Hing Man Chan
- Department of Biology, University of Ottawa, Ottawa, K1N 6N5, ON, Canada.
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