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Dack K, Huang P, Taylor CM, Rai D, Lewis SJ. Environmental and genetic predictors of whole blood mercury and selenium concentrations in pregnant women in a UK birth cohort. ENVIRONMENTAL ADVANCES 2024; 15:100469. [PMID: 38562418 PMCID: PMC10951965 DOI: 10.1016/j.envadv.2023.100469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 12/13/2023] [Accepted: 12/19/2023] [Indexed: 04/04/2024]
Abstract
There is evidence that tissue concentrations of mercury (Hg) and selenium (Se) are predicted by numerous dietary, sociodemographic, environmental, and genetic factors. This study aimed to estimate the relative importance of predictors of Hg and Se concentrations in blood samples taken from pregnant women. The Avon Longitudinal Study of Parents and Children (ALSPAC) in the UK measured whole blood Hg and Se concentrations in 3,972 pregnant women. We identified 30 potential predictors of Hg and 24 of Se, which were evaluated using cross-validated random forests to identify the optimal models for predictive power. The relative importance of individual variables was estimated by averaging the added-R2 per predictor. Linkage disequilibrium score regression was used to estimate the variance explained by genotype. A multivariable model of 14 predictors explained 22.4% of Hg variance (95% CI: 13.0 to 37.1), including 6.9% from blood Se and 3.2% from white fish consumption. There were 11 predictors which explained 15.3% of Se variance (CI: 8.9 to 25.9), including 6.4% from blood Hg, 1.3% from blood lead, and 1.3% from oily fish. Measured genetic variation explained 30% of Hg variance (CI: 8.4 to 51.5) and 37.5% of Se (CI: 10.4 to 64.5). A high proportion of Hg and Se variance could be explained from dietary, sociodemographic, metabolic, and genetic factors. Seafood consumption was less predictive of Hg than may be expected and other factors should be considered when determining risk of exposure. There was tentative evidence that genotype is a major contributor to Hg and Se variation, possibly by modifying the efficacy of internal metabolism.
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Affiliation(s)
- Kyle Dack
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Peiyuan Huang
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Caroline M Taylor
- Centre for Academic Child Health, Bristol Medical School, University of Bristol, Bristol, UK
| | - Dheeraj Rai
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Sarah J Lewis
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
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Grządka E, Bastrzyk A, Orzeł J, Oszczak-Nowińska A, Fliszkiewicz B, Siemieniuk M, Sobczyński K, Spławski O, Gołębiowska K, Ronda O, Cieślik BM. Do You Know What You Drink? Comparative Research on the Contents of Radioisotopes and Heavy Metals in Different Types of Tea from Various Parts of the World. Foods 2024; 13:742. [PMID: 38472854 DOI: 10.3390/foods13050742] [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: 02/01/2024] [Revised: 02/21/2024] [Accepted: 02/25/2024] [Indexed: 03/14/2024] Open
Abstract
The aim of this study was to assess the potential health risks of radioactive elements and heavy metals ingested through the consumption of various types of tea imported to the Polish market (black, green, red, oolong and white). The concentrations [Bq/kg] of radionuclides (40K, 137Cs, 226Ra, 210Pb and 228Th) in tea leaves before and after brewing were measured using γ-ray spectrometry with high-purity germanium (HPGe). The concentrations [mg/kg] of the studied elements (Fe, Cr, Cu, Mo, Al, Mn, Ni, P, V, Cd and Pb) were determined using a microwave-induced plasma optical emission spectrometer (MIP-OES). The results presented here will help to expand the database of heavy metals and radioactivity in teas. With regard to the potential health risk, the percentage of leaching of individual elements in different types of tea infusions was determined, and the assessment of the consumption risk was estimated. Since the calculated exposure factors, namely the HQ (Hazard Quotient) and THQ (Target Hazard Quotient), do not exceed critical levels, teas can still be considered health-beneficial products (most of the radionuclides as well as elements remain in the leaves (65-80%) after brewing).
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Affiliation(s)
- Elżbieta Grządka
- Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Anna Bastrzyk
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, C. K. Norwida 4/6 Sq., 50-373 Wroclaw, Poland
| | - Jolanta Orzeł
- Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Agata Oszczak-Nowińska
- Institute of Chemistry, Military University of Technology, Kaliskiego 2 Str., 00-908 Warszawa, Poland
| | - Bartłomiej Fliszkiewicz
- Institute of Chemistry, Military University of Technology, Kaliskiego 2 Str., 00-908 Warszawa, Poland
| | - Mateusz Siemieniuk
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233 Gdansk, Poland
| | - Krzysztof Sobczyński
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233 Gdansk, Poland
| | - Olgierd Spławski
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233 Gdansk, Poland
| | - Katarzyna Gołębiowska
- Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Oskar Ronda
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233 Gdansk, Poland
| | - Bartłomiej Michał Cieślik
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233 Gdansk, Poland
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Chen Y, Liu X, Li Q, Cai X, Wu W, Wu Q, Yuan W, Deng X, Liu Z, Zhao S, Wang B. Integrated genomics and transcriptomics reveal the extreme heavy metal tolerance and adsorption potentiality of Staphylococcus equorum. Int J Biol Macromol 2023; 229:388-400. [PMID: 36592848 DOI: 10.1016/j.ijbiomac.2022.12.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/05/2022] [Accepted: 12/21/2022] [Indexed: 12/31/2022]
Abstract
In this study, we successfully isolated 11 species of cadmium-tolerant bacterium from Pu-erh rhizosphere soil, of which Staphylococcus equorum PU1 showed the highest cadmium tolerance, with a minimum inhibitory concentration (MIC) value of 500 mg/L. The cadmium removal efficiency of PU1 in 400 mg/L cadmium medium reached 58.7 %. Based on the Nanopore PromethION and Illumina NovaSeq platforms, we successfully obtained the complete PU1 genome with a size of 2,705,540 bp, which encoded 2729 genes. We further detected 82 and 44 indel mutations in the PU1 genome compared with the KS1039 and KM1031 genomes from the database. Transcriptional analysis showed that the expression of 11 genes in PU1 increased with increasing cadmium concentrations (from 0 to 200, then to 400 mg/L), which encoded cadmium resistance, cadmium transport, and mercury resistance genes. In addition, some genes showed differential expression patterns with changes in cadmium concentration, including quinone oxidoreductase-like protein, ferrous iron transport protein, and flavohemoprotein. Gene Ontology (GO) functions, including oxidation reduction process and oxidoreductase activity functions, and KEGG pathways, including glycolysis/gluconeogenesis and biosynthesis of secondary metals, were also considered closely related to the extreme cadmium tolerance of PU1. This study provides novel insight into the cadmium tolerance mechanism of bacteria.
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Affiliation(s)
- Yaping Chen
- College of Tea Science, Yunnan Agricultural University, Kunming, China; College of Plant Protection, Yunnan Agricultural University, Kunming, China; Yunnan Organic Tea Industry Intelligent Engineering Research Center, Kunming, China
| | - Xiaohui Liu
- College of Tea Science, Yunnan Agricultural University, Kunming, China
| | - Qiang Li
- College of Food and Biological Engineering, Chengdu University, Chengdu, China
| | - Xiaobo Cai
- Yunnan Organic Tea Industry Intelligent Engineering Research Center, Kunming, China; College of Big Data, Yunnan Agricultural University, Kunming, China; Key Laboratory of Intelligent Organic Tea Garden Construction in Universities of Yunnan Province, Kunming, China
| | - Wendou Wu
- Yunnan Organic Tea Industry Intelligent Engineering Research Center, Kunming, China; College of Big Data, Yunnan Agricultural University, Kunming, China; Key Laboratory of Intelligent Organic Tea Garden Construction in Universities of Yunnan Province, Kunming, China
| | - Qi Wu
- College of Science, Yunnan Agricultural University, Kunming, China
| | - Wenxia Yuan
- College of Tea Science, Yunnan Agricultural University, Kunming, China
| | - Xiujuan Deng
- College of Tea Science, Yunnan Agricultural University, Kunming, China
| | - Zhiwe Liu
- College of Tea Science, Yunnan Agricultural University, Kunming, China
| | - Shengnan Zhao
- College of Tea Science, Yunnan Agricultural University, Kunming, China
| | - Baijuan Wang
- College of Tea Science, Yunnan Agricultural University, Kunming, China; College of Big Data, Yunnan Agricultural University, Kunming, China; Key Laboratory of Intelligent Organic Tea Garden Construction in Universities of Yunnan Province, Kunming, China.
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Gao T, Han S, Mo G, Sun Q, Zhang M, Liu H. Long-term tea consumption reduces the risk of frailty in older Chinese people: Result from a 6-year longitudinal study. Front Nutr 2022; 9:916791. [PMID: 36046130 PMCID: PMC9421071 DOI: 10.3389/fnut.2022.916791] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 07/22/2022] [Indexed: 11/13/2022] Open
Abstract
Background Vast accumulative evidence suggests that the consumption of tea and its components have various potential health benefits. This study used a longitudinal study to examine the causality between tea consumption and frailty in older Chinese people. Methods This study employed the longitudinal data from 2008 to 2014 of the Chinese Longitudinal Healthy Longevity Survey (CLHLS), which were systematically collected through face-to-face interviews. Two thousand four hundred and seventy three participants completed six-follow-up surveys in 2014 and were analyzed in this study. The frailty index recommended by Searle and co-authors, including 44 health deficits, was used. A Generalized Estimating Equation (GEE) was applied to determine the risk ratio (RR) with a 95% confidence interval (CI) for frailty, and further subgroup analyses were conducted to investigate whether the risk differed stratified by age, sex, and socioeconomic status. Additionally, the interaction between tea consumption with sex and frailty was tested. Results Of the 2,473 participants, 14.1% were consistent daily tea drinkers, and 22.6% reported frailty at the 6-year follow-up. Compared to non-tea drinkers, consistent daily tea drinkers reported a significantly lower ratio of having frailty [risk ratio (RR) = 0.54, 95% confidence interval (CI): 0.38-0.78], adjusting for sociodemographic characteristics, health behavior, socioeconomic status, and chronic illnesses. In further subgroup analyses, consistent daily tea consumption significantly reduced the risk of frailty for males (RR = 0.53, 95% CI: 0.32-0.87) but not females (RR = 0.65, 95% CI: 0.37-1.12); in the young (RR = 0.40, 95% CI: 0.22-0.74) but not in the oldest (aged ≥ 80) (RR = 0.66, 95% CI: 0.40-1.06); informal education (RR = 0.48, 95% CI: 0.28-0.84) but not formal education (RR = 0.62, 95% CI: 0.37-1.03); financial dependence (RR = 0.42, 95% CI: 0.25-0.71) but not financial independence (RR = 0.71, 95% CI: 0.41-1.23). Additionally, females showed a lower tea-mediated risk of frailty in occasional tea consumers (RR = 0.51, 95% CI: 0.29-0.89) and inconsistent tea drinkers (RR = 0.58, 95% CI: 0.37-0.93). Conclusions Habitual tea consumption can reduce the risk of frailty in older Chinese, and the benefit varied by age, sex, education, and financial support.
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Affiliation(s)
- Tianjing Gao
- School of Public Health, Bengbu Medical College, Bengbu, China
| | - Siyue Han
- School of Public Health, Bengbu Medical College, Bengbu, China
| | - Guangju Mo
- School of Public Health, Bengbu Medical College, Bengbu, China
| | - Qing Sun
- School of Public Health, Bengbu Medical College, Bengbu, China
| | - Min Zhang
- School of Health Management, Bengbu Medical College, Bengbu, China
- *Correspondence: Huaqing Liu
| | - Huaqing Liu
- School of Public Health, Bengbu Medical College, Bengbu, China
- Min Zhang
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