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Soares MB, Duckworth OW, Stýblo M, Cable PH, Alleoni LRF. Pyrolysis temperature and biochar redox activity on arsenic availability and speciation in a sediment. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132308. [PMID: 37639794 PMCID: PMC10528781 DOI: 10.1016/j.jhazmat.2023.132308] [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: 05/13/2023] [Revised: 07/28/2023] [Accepted: 08/13/2023] [Indexed: 08/31/2023]
Abstract
Biochar is widely used for water and soil remediation in part because of its local availability and low production cost. However, its effectiveness depends on physicochemical properties related to its feedstock and pyrolysis temperature, as well as the environmental conditions of its use site. Furthermore, biochar is susceptible to natural aging caused by changes in soil or sediment moisture, which can alter its redox properties and interactions with contaminants such as arsenic (As). In this study, we investigated the effect of pyrolysis temperature and biochar application on the release and transformations of As in contaminated sediments subjected to redox fluctuations. Biochar application and pyrolysis temperature played an important role in As species availability, As methylation, and dissolved organic carbon concentration. Furthermore, successive flooding cycles that induced reductive conditions in sediments increased the As content in the solution by up to seven times. In the solid phase, the application of biochar and the flooding cycle altered the spatial distribution and speciation of carbon, iron (Fe) and As. In general, the application of biochar decreased the reduction of Fe(III) and As(V) after the first cycle of flooding. Our results demonstrate that the flooding cycle plays an important role in the reoxidation of biochar to the point of enhancing the immobilization of As.
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Affiliation(s)
- Matheus B Soares
- Department of Soil Science, Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo (USP), 13418900 Piracicaba, SP, Brazil; Department of Crop and Soil Sciences, North Carolina State University, 27695 Raleigh, NC, USA.
| | - Owen W Duckworth
- Department of Crop and Soil Sciences, North Carolina State University, 27695 Raleigh, NC, USA
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 27599-7461 Chapel Hill, NC, USA
| | - Peter H Cable
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 27599-7461 Chapel Hill, NC, USA
| | - Luís R F Alleoni
- Department of Soil Science, Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo (USP), 13418900 Piracicaba, SP, Brazil
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2
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Hoy KS, Davydiuk T, Chen X, Lau C, Schofield JRM, Lu X, Graydon JA, Mitchell R, Reichert M, Le XC. Arsenic speciation in freshwater fish: challenges and research needs. FOOD QUALITY AND SAFETY 2023; 7:fyad032. [PMID: 37744965 PMCID: PMC10515374 DOI: 10.1093/fqsafe/fyad032] [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: 11/25/2021] [Revised: 07/12/2023] [Indexed: 09/26/2023]
Abstract
Food and water are the main sources of human exposure to arsenic. It is important to determine arsenic species in food because the toxicities of arsenic vary greatly with its chemical speciation. Extensive research has focused on high concentrations of arsenic species in marine organisms. The concentrations of arsenic species in freshwater fish are much lower, and their determination presents analytical challenges. In this review, we summarize the current state of knowledge on arsenic speciation in freshwater fish and discuss challenges and research needs. Fish samples are typically homogenized, and arsenic species are extracted using water/methanol with the assistance of sonication and enzyme treatment. Arsenic species in the extracts are commonly separated using high-performance liquid chromatography (HPLC) and detected using inductively coupled plasma mass spectrometry (ICPMS). Electrospray ionization tandem mass spectrometry, used in combination with HPLC and ICPMS, provides complementary information for the identification and characterization of arsenic species. The methods and perspectives discussed in this review, covering sample preparation, chromatography separation, and mass spectrometry detection, are directed to arsenic speciation in freshwater fish and applicable to studies of other food items. Despite progress made in arsenic speciation analysis, a large fraction of the total arsenic in freshwater fish remains unidentified. It is challenging to identify and quantify arsenic species present in complex sample matrices at very low concentrations. Further research is needed to improve the extraction efficiency, chromatographic resolution, detection sensitivity, and characterization capability.
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Affiliation(s)
- Karen S Hoy
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Tetiana Davydiuk
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Xiaojian Chen
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Chester Lau
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | | | - Xiufen Lu
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | | | - Ruth Mitchell
- Alberta Health, Health Protection Branch, Edmonton, Alberta, Canada
| | - Megan Reichert
- Alberta Health, Health Protection Branch, Edmonton, Alberta, Canada
| | - X Chris Le
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
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3
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Filella M, Wey S, Matoušek T, Coster M, Rodríguez-Murillo JC, Loizeau JL. Arsenic in Lake Geneva (Switzerland, France): long term monitoring, and redox and methylation speciation in an As unpolluted, oligo-mesotrophic lake. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:850-869. [PMID: 36924114 DOI: 10.1039/d2em00431c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Arsenic speciation was followed monthly along the spring productivity period (January-June 2021) in the Petit Lac (76 m deep) and in April and June 2021 in the Grand Lac (309.7 m deep) of Lake Geneva (Switzerland/France). Lake Geneva is presently an oligo-mesotrophic lake, and As-unpolluted. The water column never becomes anoxic but the oxygen saturation at the bottom of the Grand Lac is now below 30% owing to lack of water column mixing since 2012. Thus, this lake offers excellent conditions to study As behaviour in an unpolluted, oxic freshwater body. The following 'dissolved' As species: iAs(III), iAs(III + V), MA(III), MA(III + V), DMA(III + V), and TMAO were analysed by HG-CT-ICP-MS/MS. Water column measurements were complemented with occasional sampling in the main rivers feeding the lake and in the interstitial waters of a sediment core. The presence of MA(III) and TMAO and the predominance of iAs(V) in lake and river samples has been confirmed as well as the key role of algae in the formation of organic species. While the total 'dissolved' As concentrations showed nearly vertical profiles in the Petit Lac, As concentrations steadily increase at deeper depths in the Grand Lac due to the lack of mixing and build up in bottom waters. The evaluation of 25 years of monthly data of 'dissolved' As concentrations showed no significant temporal trends between 1997 and 2021. The observed seasonal character of the 'dissolved' As along this period coincides with a lack of seasonality in As mass inventories, pointing to a seasonal internal cycling of As species in the water column with exchanges between the 'dissolved' and 'particulate' (i.e., algae) fractions.
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Affiliation(s)
- Montserrat Filella
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland.
| | - Sebastian Wey
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland.
| | - Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic.
| | | | | | - Jean-Luc Loizeau
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland.
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Douillet C, Miller M, Cable PH, Shi Q, El-Masri H, Matoušek T, Koller BH, Thomas DJ, Stýblo M. Fate of arsenicals in mice carrying the human AS3MT gene exposed to environmentally relevant levels of arsenite in drinking water. Sci Rep 2023; 13:3660. [PMID: 36871058 PMCID: PMC9985638 DOI: 10.1038/s41598-023-30723-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Although mice are widely used to study adverse effects of inorganic arsenic (iAs), higher rates of iAs methylation in mice than in humans may limit their utility as a model organism. A recently created 129S6 mouse strain in which the Borcs7/As3mt locus replaces the human BORCS7/AS3MT locus exhibits a human-like pattern of iAs metabolism. Here, we evaluate dosage dependency of iAs metabolism in humanized (Hs) mice. We determined tissue and urinary concentrations and proportions of iAs, methylarsenic (MAs), and dimethylarsenic (DMAs) in male and female Hs and wild-type (WT) mice that received 25- or 400-ppb iAs in drinking water. At both exposure levels, Hs mice excrete less total arsenic (tAs) in urine and retain more tAs in tissues than WT mice. Tissue tAs levels are higher in Hs females than in Hs males, particularly after exposure to 400-ppb iAs. Tissue and urinary fractions of tAs present as iAs and MAs are significantly greater in Hs mice than in WT mice. Notably, tissue tAs dosimetry in Hs mice resembles human tissue dosimetry predicted by a physiologically based pharmacokinetic model. These data provide additional support for use of Hs mice in laboratory studies examining effects of iAs exposure in target tissues or cells.
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Affiliation(s)
- Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7461, USA
| | - Madison Miller
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7461, USA
| | - Peter H Cable
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7461, USA
| | - Qing Shi
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7461, USA
| | - Hisham El-Masri
- Chemical Characterization and Exposure Division, Center for Computational Toxicology & Exposure, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27709, USA
| | - Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Veveří 97, 602 00, Brno, Czech Republic
| | - Beverly H Koller
- Department of Genetics, School of Medicine, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - David J Thomas
- Dinkey Creek Consulting, LLC, Chapel Hill, NC, 27517, USA
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7461, USA.
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Popov M, Zemanová V, Sácký J, Pavlík M, Leonhardt T, Matoušek T, Kaňa A, Pavlíková D, Kotrba P. Arsenic accumulation and speciation in two cultivars of Pteris cretica L. and characterization of arsenate reductase PcACR2 and arsenite transporter PcACR3 genes in the hyperaccumulating cv. Albo-lineata. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 216:112196. [PMID: 33848737 DOI: 10.1016/j.ecoenv.2021.112196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 03/19/2021] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
Pollution and poisoning with carcinogenic arsenic (As) is of major concern globally. Interestingly, there are ferns that can naturally tolerate remarkably high As concentrations in soils while hyperaccumulating this metalloid in their fronds. Besides Pteris vittata in which As-related traits and molecular determinants have been studied in detail, the As hyperaccumulation status has been attributed also to Pteris cretica. We thus inspected two P. cretica cultivars, Parkerii and Albo-lineata, for As hyperaccumulation traits. The cultivars were grown in soils supplemented with 20, 100, and 250 mg kg-1 of inorganic arsenate (iAsV). Unlike Parkerii, Albo-lineata was confirmed to be As tolerant and hyperaccumulating, with up to 1.3 and 6.4 g As kg-1 dry weight in roots and fronds, respectively, from soils amended with 250 mg iAsV kg-1. As speciation analyses rejected that organoarsenical species and binding with phytochelatins and other proteinaceous ligands would play any significant role in the biology of As in either cultivar. While in Parkerii, the dominating As species, particularly in roots, occurred as iAsV, in Albo-lineata the majority of the root and frond As was apparently converted to iAsIII. Parkerii markedly accumulated iAsIII in its fronds when grown on As spiked soils. Considering the roles iAsV reductase ACR2 and iAsIII transporter ACR3 may have in the handling of iAs, we isolated Albo-lineata PcACR2 and PcACR3 genes closely related to P. vittata PvACR2 and PvACR3. The gene expression analysis in Albo-lineata fronds revealed that the transcription of PcACR2 and PcACR3 was clearly As responsive (up to 6.5- and 45-times increase in transcript levels compared to control soil conditions, respectively). The tolerance and uptake assays in yeasts showed that PcACRs can complement corresponding As-sensitive mutations, indicating that PcACR2 and PcACR3 encode functional proteins that can perform, respectively, iAsV reduction and membrane iAsIII transport tasks in As-hyperaccumulating Albo-lineata.
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Affiliation(s)
- Marek Popov
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague, Czech Republic; Department of Botany and Plant Physiology, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
| | - Veronika Zemanová
- Isotope Laboratory, Institute of Experimental Botany, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic; Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
| | - Jan Sácký
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Milan Pavlík
- Isotope Laboratory, Institute of Experimental Botany, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic
| | - Tereza Leonhardt
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Tomáš Matoušek
- Institute of Analytical Chemistry, The Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
| | - Antonín Kaňa
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Daniela Pavlíková
- Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
| | - Pavel Kotrba
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague, Czech Republic.
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6
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García-Figueroa A, Filella M, Matoušek T. Speciation of germanium in environmental water reference materials by hydride generation and cryotrapping in combination with ICP-MS/MS. Talanta 2021; 225:121972. [PMID: 33592806 DOI: 10.1016/j.talanta.2020.121972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 10/22/2022]
Abstract
A method for the speciation analysis of the three main species of germanium in environmental waters, namely inorganic germanium (iGe), monomethyl germanium (MMGe) and dimethyl germanium (DMGe), has been developed. Germanium species were volatilized by hydride generation (HG) prior to their preconcentration/separation in a semi-automated cryogenic trap (cryotrapping, CT) and detection by ICP-MS/MS. A procedure to minimize the iGe blanks from the chemicals and water is reported. One mL of water can be analyzed without any pretreatment. After application of this procedure, and the careful optimization of all experimental variables, limits of detection (LOD) of 0.015, 0.005 and 0.003 ng L-1 have been obtained for iGe, MMGe and DMGe, respectively. Standard addition experiments did not show any significant matrix effect, and, therefore, external calibration was used for sample analysis. In the Tris-HCl + L-Cysteine reaction media, additional experiments did not reveal any significant demethylation of MMGe to iGe in the process of HG-CT, which could affect the accuracy of the analysis in seawater. The method has been applied to the analysis of iGe, MMGe and DMGe in certified reference materials of unspiked natural waters: CASS-4, CASS-5 and CASS-6 (nearshore seawater); NASS-5 and NASS-7 (seawater); SLRS-4, SLRS-5 and SLRS-6 (river water).
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Affiliation(s)
- Adrián García-Figueroa
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic.
| | - Montserrat Filella
- Department F.-A. Forel, University of Geneva, Boulevard Carl-Vogt 66, CH-1205, Geneva, Switzerland
| | - Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic
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Stýblo M, Venkatratnam A, Fry RC, Thomas DJ. Origins, fate, and actions of methylated trivalent metabolites of inorganic arsenic: progress and prospects. Arch Toxicol 2021; 95:1547-1572. [PMID: 33768354 DOI: 10.1007/s00204-021-03028-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 03/11/2021] [Indexed: 12/16/2022]
Abstract
The toxic metalloid inorganic arsenic (iAs) is widely distributed in the environment. Chronic exposure to iAs from environmental sources has been linked to a variety of human diseases. Methylation of iAs is the primary pathway for metabolism of iAs. In humans, methylation of iAs is catalyzed by arsenic (+ 3 oxidation state) methyltransferase (AS3MT). Conversion of iAs to mono- and di-methylated species (MAs and DMAs) detoxifies iAs by increasing the rate of whole body clearance of arsenic. Interindividual differences in iAs metabolism play key roles in pathogenesis of and susceptibility to a range of disease outcomes associated with iAs exposure. These adverse health effects are in part associated with the production of methylated trivalent arsenic species, methylarsonous acid (MAsIII) and dimethylarsinous acid (DMAsIII), during AS3MT-catalyzed methylation of iAs. The formation of these metabolites activates iAs to unique forms that cause disease initiation and progression. Taken together, the current evidence suggests that methylation of iAs is a pathway for detoxification and for activation of the metalloid. Beyond this general understanding of the consequences of iAs methylation, many questions remain unanswered. Our knowledge of metabolic targets for MAsIII and DMAsIII in human cells and mechanisms for interactions between these arsenicals and targets is incomplete. Development of novel analytical methods for quantitation of MAsIII and DMAsIII in biological samples promises to address some of these gaps. Here, we summarize current knowledge of the enzymatic basis of MAsIII and DMAsIII formation, the toxic actions of these metabolites, and methods available for their detection and quantification in biomatrices. Major knowledge gaps and future research directions are also discussed.
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Affiliation(s)
- Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
| | - Abhishek Venkatratnam
- Department of Nutrition, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Environmental Science and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Rebecca C Fry
- Department of Environmental Science and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - David J Thomas
- Chemical Characterization and Exposure Division, Center for Computational Toxicology and Exposure, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27709, USA.
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Matoušek T, Kratzer J, Sturgeon RE, Mester Z, Musil S. A mass spectrometric study of hydride generated arsenic species identified by direct analysis in real time (DART) following cryotrapping. Anal Bioanal Chem 2021; 413:3443-3453. [PMID: 33755769 DOI: 10.1007/s00216-021-03289-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/24/2021] [Accepted: 03/10/2021] [Indexed: 11/24/2022]
Abstract
Hydride generation (HG) coupled to cryotrapping was employed to introduce, separately and with high selectivity, four gaseous arsanes into a direct analysis in real time source for high-resolution mass spectrometry (DART-HR-MS). The arsanes, i.e., arsane (AsH3), methylarsane (CH3AsH2), dimethylarsane ((CH3)2AsH), and trimethylarsane ((CH3)3As), were formed under HG conditions that were close to those typically used for analytical purposes. Arsenic containing ion species formed during ambient ionization in the DART were examined both in the positive and negative ion modes. It was clearly demonstrated that numerous arsenic ion species originated in the DART source that did not accurately reflect their origin. Pronounced oxidation, hydride abstraction, methyl group(s) loss, and formation of oligomer ions complicate the identification of the original species in both modes of detection, leading to potential misinterpretation. Suitability of the use of the DART source for identification of arsenic species in multiphase reaction systems comprising HG is discussed.
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Affiliation(s)
- Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic
| | - Jan Kratzer
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic
| | - Ralph E Sturgeon
- Metrology, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada
| | - Zoltán Mester
- Metrology, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada
| | - Stanislav Musil
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic.
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Mercury volatile species generation from HCl and TRIS buffer media: Quantification of generation efficiency and characterization of severe changes in speciation information due to de-alkylation. Anal Chim Acta 2020; 1119:68-76. [DOI: 10.1016/j.aca.2020.04.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/15/2020] [Accepted: 04/25/2020] [Indexed: 12/17/2022]
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10
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Recent developments in determination and speciation of arsenic in environmental and biological samples by atomic spectrometry. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104312] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Bommarito PA, Beck R, Douillet C, Del Razo LM, Garcia-Vargas GG, Valenzuela OL, Sanchez-Peña LC, Styblo M, Fry RC. Evaluation of plasma arsenicals as potential biomarkers of exposure to inorganic arsenic. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2019; 29:718-729. [PMID: 30728485 PMCID: PMC6684877 DOI: 10.1038/s41370-019-0121-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 01/10/2019] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
Exposure to inorganic arsenic (iAs) remains a global public health problem. Urinary arsenicals are the current gold-standard for estimating both iAs exposure and iAs metabolism. However, the distribution of these arsenicals may differ between the urine and target organs. Instead, plasma arsenicals may better represent internal dose and capture target organ exposure to arsenicals. Drinking water iAs, plasma and urinary arsenicals were quantified in individuals living in the Zimapan and Lagunera regions of Mexico. The relationship between drinking water iAs and plasma arsenicals was examined using both Spearman correlations and multivariable linear regression models. In addition, the distribution of arsenicals in plasma and urine was examined and the association between plasma and urinary arsenicals was assessed using both Spearman correlations and multivariable linear regression models. Levels of iAs in drinking water were significantly associated with plasma arsenicals in unadjusted and adjusted analyses and the strength of these associations was similar to that of drinking water iAs and urinary arsenicals. These results suggest that plasma arsenicals are reliable biomarkers of iAs exposure via drinking water. However, there were notable differences between the profiles of arsenicals in the plasma and the urine. Key differences between the proportions of arsenicals in plasma and urine may indicate that urine and plasma arsenicals reflect different aspects of iAs toxicokinetics, including metabolism and excretion.
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Affiliation(s)
- Paige A Bommarito
- Department of Environmental Science and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Rowan Beck
- Department of Genetics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christelle Douillet
- Department of Environmental Science and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Luz M Del Razo
- Departamento de Toxicologia, Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico, DF, Mexico
| | - Gonzalo-G Garcia-Vargas
- Facultdad de Medicina, Universidad Juarez del Estado de Durango, Gomez Palacio, Durango, Mexico
| | - Olga L Valenzuela
- Departamento de Toxicologia, Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico, DF, Mexico
| | - Luz C Sanchez-Peña
- Departamento de Toxicologia, Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico, DF, Mexico
| | - Mirek Styblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Curriculum in Toxicology and Environmental Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Rebecca C Fry
- Department of Environmental Science and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Curriculum in Toxicology and Environmental Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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12
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Beck R, Bommarito P, Douillet C, Kanke M, Del Razo LM, García-Vargas G, Fry RC, Sethupathy P, Stýblo M. Circulating miRNAs Associated with Arsenic Exposure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:14487-14495. [PMID: 30457847 PMCID: PMC7036137 DOI: 10.1021/acs.est.8b06457] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Arsenic (As) is a toxic metalloid. Inorganic arsenic (iAs) is a form of As commonly found in drinking water and in some foods. Overwhelming evidence suggests that people chronically exposed to iAs are at risk of developing cancer or cardiovascular, neurological, and metabolic diseases. Although the mechanisms underlying iAs-associated illness remain poorly characterized, a growing body of literature raises the possibility that microRNAs (miRNAs), post-transcriptional gene suppressors, may serve as mediators and/or early indicators of the pathologies associated with iAs exposure. To characterize the circulating miRNA profiles of individuals chronically exposed to iAs, samples of plasma were collected from 109 healthy residents of the city of Zimapán and the Lagunera area in Mexico, the regions with historically high exposures to iAs in drinking water. These plasma samples were analyzed for small RNAs using high-throughput sequencing and for iAs and its methylated metabolites. Associations between plasma levels of arsenic species and miRNAs were evaluated. Six circulating miRNAs (miRs-423-5p, -142-5p -2, -423-5p +1, -320c-1, -320c-2, and -454-5p), two of which have been previously linked to cardiovascular disease and diabetes (miRs-423-5p, -454-5p), were found to be significantly correlated with plasma MAs. No miRNAs were associated with plasma iAs or DMAs after correction for multiple testing. These miRNAs may represent mechanistic links between iAs exposure and disease or serve as markers of disease risks associated with this exposure.
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Affiliation(s)
- Rowan Beck
- Department of Genetics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Paige Bommarito
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Matt Kanke
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Luz M Del Razo
- Department of Toxicology, Center of Investigation and of Advanced Studies of the National Polytechnic Institute (Cinvestav-IPN), México City, Mexico
| | | | - Rebecca C. Fry
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Praveen Sethupathy
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
- Corresponding Authors: Praveen Sethupathy, ; Miroslav Styblo,
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Corresponding Authors: Praveen Sethupathy, ; Miroslav Styblo,
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13
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An online preconcentration system for speciation analysis of arsenic in seawater by hydride generation flame atomic absorption spectrometry. Microchem J 2018. [DOI: 10.1016/j.microc.2018.08.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Šoukal J, Sturgeon RE, Musil S. Efficient Photochemical Vapor Generation of Molybdenum for ICPMS Detection. Anal Chem 2018; 90:11688-11695. [DOI: 10.1021/acs.analchem.8b03354] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jakub Šoukal
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
- Charles University, Faculty of Science, Department of Analytical Chemistry, Albertov 6, 128 43 Prague, Czech Republic
| | - Ralph E. Sturgeon
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
| | - Stanislav Musil
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
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15
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Laine JE, Ilievski V, Richardson DB, Herring AH, Stýblo M, Rubio-Andrade M, Garcia-Vargas G, Gamble MV, Fry RC. Maternal one carbon metabolism and arsenic methylation in a pregnancy cohort in Mexico. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2018; 28:505-514. [PMID: 30068932 PMCID: PMC6531675 DOI: 10.1038/s41370-018-0041-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/18/2017] [Accepted: 09/06/2017] [Indexed: 05/04/2023]
Abstract
The prenatal period represents a critical window of susceptibility to inorganic arsenic (iAs) exposure from contaminated drinking water. Ingested iAs undergoes hepatic methylation generating mono and di-methyl arsenicals (MMAs and DMAs, respectively), a process that facilitates urinary arsenic (As) elimination. Differences in pregnant women's metabolism of As as indicated by greater proportions of MMAs and smaller proportions of DMAs in urine are a risk factor for adverse birth outcomes. One carbon metabolism (OCM), the nutritionally-regulated pathway essential for supplying methyl groups, plays a role in As metabolism and is understudied during the prenatal period. In this cross-sectional study from the Biomarkers of Exposure to ARsenic (BEAR) pregnancy cohort in Gómez Palacio, Mexico, we assessed the relationships among OCM indicators (e.g. maternal serum B12, folate, and homocysteine (Hcys)), and levels of iAs and its metabolites in maternal urine and in neonatal cord serum. The prevalence of folate sufficiency (folate levels > 9 nmol/L) in the cohort was high 99%, and hyperhomocysteinemia (Hcys levels > 10.4 μmol/L) was low (8%). However, 74% of the women displayed a deficiency in B12 (serum levels < 148 pmol/L). Association analyses identified that infants born to mothers in the lowest tertile of serum folate had significantly higher mean levels of %MMA in cord serum relative to folate replete women. In addition, elevated maternal Hcys was associated with total As in maternal urine and cord serum as well as cord serum %MMAs. The results from this study indicate that maternal OCM status may influence the distribution of As metabolites in cord serum.
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Affiliation(s)
- Jessica E Laine
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA.
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - David B Richardson
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Amy H Herring
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
- Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Marisela Rubio-Andrade
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango, Mexico
| | - Gonzalo Garcia-Vargas
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango, Mexico
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Rebecca C Fry
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
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16
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Laine JE, Ilievski V, Richardson DB, Herring AH, Stýblo M, Rubio-Andrade M, Garcia-Vargas G, Gamble MV, Fry RC. Maternal one carbon metabolism and arsenic methylation in a pregnancy cohort in Mexico. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2018. [PMID: 30068932 DOI: 10.1038/s41370-41018-40041-41371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The prenatal period represents a critical window of susceptibility to inorganic arsenic (iAs) exposure from contaminated drinking water. Ingested iAs undergoes hepatic methylation generating mono and di-methyl arsenicals (MMAs and DMAs, respectively), a process that facilitates urinary arsenic (As) elimination. Differences in pregnant women's metabolism of As as indicated by greater proportions of MMAs and smaller proportions of DMAs in urine are a risk factor for adverse birth outcomes. One carbon metabolism (OCM), the nutritionally-regulated pathway essential for supplying methyl groups, plays a role in As metabolism and is understudied during the prenatal period. In this cross-sectional study from the Biomarkers of Exposure to ARsenic (BEAR) pregnancy cohort in Gómez Palacio, Mexico, we assessed the relationships among OCM indicators (e.g. maternal serum B12, folate, and homocysteine (Hcys)), and levels of iAs and its metabolites in maternal urine and in neonatal cord serum. The prevalence of folate sufficiency (folate levels > 9 nmol/L) in the cohort was high 99%, and hyperhomocysteinemia (Hcys levels > 10.4 μmol/L) was low (8%). However, 74% of the women displayed a deficiency in B12 (serum levels < 148 pmol/L). Association analyses identified that infants born to mothers in the lowest tertile of serum folate had significantly higher mean levels of %MMA in cord serum relative to folate replete women. In addition, elevated maternal Hcys was associated with total As in maternal urine and cord serum as well as cord serum %MMAs. The results from this study indicate that maternal OCM status may influence the distribution of As metabolites in cord serum.
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Affiliation(s)
- Jessica E Laine
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA.
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - David B Richardson
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Amy H Herring
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
- Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Marisela Rubio-Andrade
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango, Mexico
| | - Gonzalo Garcia-Vargas
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango, Mexico
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Rebecca C Fry
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
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17
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Xu H, Wang X, Burchiel SW. Toxicity of environmentally-relevant concentrations of arsenic on developing T lymphocyte. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 62:107-113. [PMID: 29986278 DOI: 10.1016/j.etap.2018.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/02/2018] [Indexed: 05/14/2023]
Abstract
Arsenic is a ubiquitous environmental contaminant that exists in many inorganic and organic forms. In particular, arsenite is known to induce immunotoxicity in humans and animals. There are still major gaps in our understanding of the mechanism(s) of the immunotoxicity induced by arsenic at environmentally-relevant concentrations. T cells are an essential part of the immune system required for host resistance to infections and protection from cancer. Developing T cells in the thymus have been shown to be particularly prone to arsenite-induced toxicity at low concentrations. Suppression of DNA repair proteins and oxidative stress have been identified as a mechanism of genotoxicity that occurs at low to moderate concentrations. Inhibition of the IL-7 signaling pathway was thought to be responsible for the non-genotoxicity induced by low to moderate doses of arsenic. Interestingly, T cells at different stages of their development had distinct sensitivities to arsenite, which was regulated by arsenite exporters. The current evidence strongly suggests that low to moderate doses of arsenic induces toxic effects in the developing T cells and accumulates to highest levels in the early cells that are least capable to pump out arsenic, which may be the mechanism of the high arsenic sensitivity. Therefore, quantification of the exposure levels should be encouraged in future arsenic toxicity studies.
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Affiliation(s)
- Huan Xu
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China.
| | - Xiaolei Wang
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM, 87131, USA.
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18
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Yang L, Nadeau K, Meija J, Grinberg P, Pagliano E, Ardini F, Grotti M, Schlosser C, Streu P, Achterberg EP, Sohrin Y, Minami T, Zheng L, Wu J, Chen G, Ellwood MJ, Turetta C, Aguilar-Islas A, Rember R, Sarthou G, Tonnard M, Planquette H, Matoušek T, Crum S, Mester Z. Inter-laboratory study for the certification of trace elements in seawater certified reference materials NASS-7 and CASS-6. Anal Bioanal Chem 2018; 410:4469-4479. [PMID: 29721576 DOI: 10.1007/s00216-018-1102-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/13/2018] [Accepted: 04/20/2018] [Indexed: 01/20/2023]
Abstract
Certification of trace metals in seawater certified reference materials (CRMs) NASS-7 and CASS-6 is described. At the National Research Council Canada (NRC), column separation was performed to remove the seawater matrix prior to the determination of Cd, Cr, Cu, Fe, Pb, Mn, Mo, Ni, U, V, and Zn, whereas As was directly measured in 10-fold diluted seawater samples, and B was directly measured in 200-fold diluted seawater samples. High-resolution inductively coupled plasma mass spectrometry (HR-ICPMS) was used for elemental analyses, with double isotope dilution for the accurate determination of B, Cd, Cr, Cu, Fe, Pb, Mo, Ni, U, and Zn in seawater NASS-7 and CASS-6, and standard addition calibration for As, Co, Mn, and V. In addition, all analytes were measured using standard addition calibration with triple quadrupole (QQQ)-ICPMS to provide a second set of data at NRC. Expert laboratories worldwide were invited to contribute data to the certification of trace metals in NASS-7 and CASS-6. Various analytical methods were employed by participants including column separation, co-precipitation, and simple dilution coupled to ICPMS detection or flow injection analysis coupled to chemiluminescence detection, with use of double isotope dilution calibration, matrix matching external calibration, and standard addition calibration. Results presented in this study show that majority of laboratories have demonstrated their measurement capabilities for the accurate determination of trace metals in seawater. As a result of this comparison, certified/reference values and associated uncertainties were assigned for 14 elements in seawater CRMs NASS-7 and CASS-6, suitable for the validation of methods used for seawater analysis.
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Affiliation(s)
- Lu Yang
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada.
| | - Kenny Nadeau
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada
| | - Juris Meija
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada
| | - Patricia Grinberg
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada
| | - Enea Pagliano
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada
| | - Francisco Ardini
- Department of Chemistry and Industrial Chemistry, University of Genoa (UG), Via Dodecaneso 31, 16146, Genoa, Italy
| | - Marco Grotti
- Department of Chemistry and Industrial Chemistry, University of Genoa (UG), Via Dodecaneso 31, 16146, Genoa, Italy
| | - Christian Schlosser
- GEOMAR - Helmholtz Centre for Ocean Research (GEOMAR), Wischhofstr 1-3, 24148, Kiel, Germany
| | - Peter Streu
- GEOMAR - Helmholtz Centre for Ocean Research (GEOMAR), Wischhofstr 1-3, 24148, Kiel, Germany
| | - Eric P Achterberg
- GEOMAR - Helmholtz Centre for Ocean Research (GEOMAR), Wischhofstr 1-3, 24148, Kiel, Germany
| | - Yoshiki Sohrin
- Institute for Chemical Research, Kyoto University (KU), Gokasho, Uji-city, Kyoto, 611-0011, Japan
| | - Tomoharu Minami
- Institute for Chemical Research, Kyoto University (KU), Gokasho, Uji-city, Kyoto, 611-0011, Japan
| | - Linjie Zheng
- Institute for Chemical Research, Kyoto University (KU), Gokasho, Uji-city, Kyoto, 611-0011, Japan
| | - Jingfeng Wu
- Rosenstiel School of Marine and Atmospheric Science (RSMAS), 4600 Rickenbacker Causeway, Miami, FL, 33149, USA.,School of Biology and Marine sciences, Shenzhen University, Shenzhen, 518060, Guangdong, China
| | - Gedun Chen
- Rosenstiel School of Marine and Atmospheric Science (RSMAS), 4600 Rickenbacker Causeway, Miami, FL, 33149, USA
| | - Michael J Ellwood
- Research School of Earth Sciences, The Australian National University (ANU), Canberra, ACT, 2601, Australia
| | - Clara Turetta
- Institute for the Dynamics of Environmental Processes, National Research Council of Italy (DEP), Via Torino 155, 30172, Venezia-Mestre, (VE), Italy
| | - Ana Aguilar-Islas
- CFOS/IARC, University of Alaska Fairbanks (UAF), Fairbanks, AK, 99775-7220, USA
| | - Robert Rember
- CFOS/IARC, University of Alaska Fairbanks (UAF), Fairbanks, AK, 99775-7220, USA
| | - Géraldine Sarthou
- Laboratoire des sciences de l'Environnement MARin (LEMAR), UMR CNRS UBO IRD Ifremer 6539, Place Nicolas Copernic, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Manon Tonnard
- Laboratoire des sciences de l'Environnement MARin (LEMAR), UMR CNRS UBO IRD Ifremer 6539, Place Nicolas Copernic, Technopôle Brest Iroise, 29280, Plouzané, France.,Institute for Marine Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, TAS, 7004, Australia
| | - Hélène Planquette
- Laboratoire des sciences de l'Environnement MARin (LEMAR), UMR CNRS UBO IRD Ifremer 6539, Place Nicolas Copernic, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences (IAC), Veveří 97, 602 00, Brno, Czech Republic
| | - Steven Crum
- QUASIMEME, NL- 6700 EC Wageningen, Bornsesteeg 10, Bennekom, 6721 NG, Ede, The Netherlands
| | - Zoltán Mester
- National Research Council Canada (NRC), 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada
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19
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Marschner K, Musil S, Mikšík I, Dědina J. Investigation of hydride generation from arsenosugars - Is it feasible for speciation analysis? Anal Chim Acta 2018; 1008:8-17. [DOI: 10.1016/j.aca.2018.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/05/2018] [Accepted: 01/08/2018] [Indexed: 10/18/2022]
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20
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Savage L, Carey M, Williams PN, Meharg AA. Biovolatilization of Arsenic as Arsines from Seawater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3968-3974. [PMID: 29505707 DOI: 10.1021/acs.est.7b06456] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Marine sources of arsenic to the atmosphere are normally dismissed as minor. Here we show that arsenic can be biovolatilized from seawater, and that biovolatilzation is based on organic arsenic species present in the seawater. Even though inorganic arsenic is in great excess in seawaters, it is trimethylarsine (TMA) that is the primary biovolatilized product, with dimethylarsine (DMA) also observed if dimethylarsinic acid (DMAA) is spiked into seawaters. With respect to budgets, 0.04% of the total arsenic in the seawater was biovolatilized over a 2-week incubation period. To test the environmental significance of this finding, wet deposition was analyzed for arsenic species at coastal locations, one of which was the origin of the seawater. It was found that the oxidized product of TMA, trimethylarsine oxide (TMAO), and to a less extent DMAA were widely present. When outputs for arsines (0.9 nmol/m2/d) from seawater and inputs from wet deposition (0.3-0.5 nmol/m2/d) were compared, they were of the same order of magnitude. These findings provide impetus to reexamining the global arsenic cycle, as there is now a need to determine the flux of arsines from the ocean to the atmosphere.
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Affiliation(s)
- Laurie Savage
- Institute for Global Food Security , Queen's University Belfast , David Keir Building, Malone Road , Belfast , BT9 5BN , Northern Ireland
| | - Manus Carey
- Institute for Global Food Security , Queen's University Belfast , David Keir Building, Malone Road , Belfast , BT9 5BN , Northern Ireland
| | - Paul N Williams
- Institute for Global Food Security , Queen's University Belfast , David Keir Building, Malone Road , Belfast , BT9 5BN , Northern Ireland
| | - Andrew A Meharg
- Institute for Global Food Security , Queen's University Belfast , David Keir Building, Malone Road , Belfast , BT9 5BN , Northern Ireland
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21
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Vyhnanovský J, Kratzer J, Benada O, Matoušek T, Mester Z, Sturgeon RE, Dědina J, Musil S. Diethyldithiocarbamate enhanced chemical generation of volatile palladium species, their characterization by AAS, ICP-MS, TEM and DART-MS and proposed mechanism of action. Anal Chim Acta 2017; 1005:16-26. [PMID: 29389315 DOI: 10.1016/j.aca.2017.12.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/04/2017] [Accepted: 12/06/2017] [Indexed: 11/27/2022]
Abstract
Comprehensive investigation of chemical generation of volatile species (VSG) of palladium for detection by analytical atomic and mass spectrometry and, specifically, the mechanistic aspects of their formation and tentative identification are presented. VSG was achieved in a flow injection mode using a generator that permitted rapid mixing of acidified sample with NaBH4 reductant. Atomization in a diffusion flame with detection by atomic absorption spectrometry was exclusively used for optimization of generation conditions while inductively coupled plasma mass spectrometry was utilized to investigate overall system efficiency and analytical metrics of the VSG system for potential ultratrace analysis. Sodium diethyldithiocarbamate (DDTC) served as a crucial reaction modifier, enhancing overall system efficiency 9-fold. Combinations of modifiers, Triton X-100 and Antifoam B surfactants provided a synergistic effect to yield a further 2-fold enhancement of VSG. The overall system efficiency was in the range 16-22%, with higher efficiencies correlating with higher Pd concentrations. The contribution of co-generated aerosol to the overall system efficiency, determined by means of concurrent measurement of added Cs, was negligible - less than 0.1%. The nature of the volatile species was investigated using several approaches, but principally by transmission electron microscopy (TEM) after their collection on a grid, and by direct analysis in real time (DART) using high resolution orbitrap mass spectrometry. These experiments suggest a parallel but dual-route mechanism of VSG of Pd, one attributed to generation of a volatile DDTC chelate of Pd and a second to nanoparticle formation.
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Affiliation(s)
- Jaromír Vyhnanovský
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic; Charles University in Prague, Faculty of Science, Department of Analytical Chemistry, Albertov 8, 128 43 Prague, Czech Republic
| | - Jan Kratzer
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
| | - Oldřich Benada
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
| | - Zoltán Mester
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
| | - Ralph E Sturgeon
- National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada
| | - Jiří Dědina
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic
| | - Stanislav Musil
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, 602 00 Brno, Czech Republic.
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22
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Savage L, Carey M, Hossain M, Islam MR, de Silva PMCS, Williams PN, Meharg AA. Elevated Trimethylarsine Oxide and Inorganic Arsenic in Northern Hemisphere Summer Monsoonal Wet Deposition. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12210-12218. [PMID: 28977751 DOI: 10.1021/acs.est.7b04356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
For arsenic speciation, the inputs for wet deposition are not well understood. Here we demonstrate that trimethylarsine oxide (TMAO) and inorganic arsenic are the dominant species in monsoonal wet deposition in the summer Indian subcontinent, Bangladesh, with inorganic arsenic dominating, accounting for ∼80% of total arsenic in this medium. Lower concentrations of both species were found in monsoonal wet deposition in the winter Indian subcontinent, Sri Lanka. The only other species present was dimethylarsinic acid (DMAA), but this was usually below limits of detection (LoD). We hypothesize that TMAO and inorganic arsenic in monsoonal wet deposition are predominantly of marine origin. For TMAO, the potential source is the atmospheric oxidation of marine derived trimethylarsine. For inorganic arsenic, our evidence suggests entrainment of water column inorganic arsenic into atmospheric particulates. These conclusions are based on weather trajectory analysis and on the strong correlations with known wet deposition marine derived elements: boron, iodine, and selenium. The finding that TMAO and inorganic arsenic are widely present and elevated in monsoonal wet deposition identifies major knowledge gaps that need to be addressed regarding the understanding of arsenic's global cycle.
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Affiliation(s)
- Laurie Savage
- Institute for Global Food Security, Queen's University Belfast , David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland
| | - Manus Carey
- Institute for Global Food Security, Queen's University Belfast , David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland
| | - Mahmud Hossain
- Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - M Rafiqul Islam
- Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - P Mangala C S de Silva
- Department of Zoology, Faculty of Science, University of Ruhuna , Matara 81170, Sri Lanka
| | - Paul N Williams
- Institute for Global Food Security, Queen's University Belfast , David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland
| | - Andrew A Meharg
- Institute for Global Food Security, Queen's University Belfast , David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland
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23
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Matoušek T, Wang Z, Douillet C, Musil S, Stýblo M. Direct Speciation Analysis of Arsenic in Whole Blood and Blood Plasma at Low Exposure Levels by Hydride Generation-Cryotrapping-Inductively Coupled Plasma Mass Spectrometry. Anal Chem 2017; 89:9633-9637. [PMID: 28809551 PMCID: PMC6611167 DOI: 10.1021/acs.analchem.7b01868] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A method for analysis of toxicologically important arsenic species in blood plasma and whole blood by selective hydride generation with cryotrapping (HG-CT) coupled either to atomic absorption spectrometry (AAS) with a quartz multiatomizer or to inductively coupled plasma mass spectrometry (ICPMS) has been validated. Sample preparation, which involved only 5 times dilution with addition of Triton X-100, Antifoam B, and l-cysteine, suppressed excessive foaming in a hydride generator. Calibration slopes for whole blood and blood plasma spiked with arsenate, monomethylarsonate, and dimethylarsinate at 0.25-1 μg L-1 As and 0.025-0.1 μg L-1 As for AAS and ICPMS detection, respectively, did not differ from slopes in aqueous solutions. HG-CT-AAS was used to analyze samples with elevated levels of arsenic species-blood plasma from patients treated with arsenic trioxide for acute promyelocytic leukemia and whole blood from mice fed an arsenic-containing diet. A good agreement between results of the direct analysis and analysis after mild digestion in phosphoric acid proved the good efficiency of the direct HG-CT procedure for the arsenic species in these types of biological samples. In the next step, plasma and whole blood from healthy donors that were spiked with the plasma from leukemia patients at levels of 0.15-0.4 μg L-1 As were analyzed by direct HG-CT-ICPMS. Good recoveries for all species even at these low levels (88-104%) were obtained. Limits of detection in blood and plasma were 0.014 μg L-1 for inorganic arsenic and below 0.002 μg L-1 As for methylated arsenic species. Thus, the ultrasensitive direct HG-CT-ICPMS method is uniquely suited for analyses of blood plasma and whole blood from individuals at low exposure levels.
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Affiliation(s)
- Tomáš Matoušek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Veveří97, Brno 602 00, Czech Republic
| | - Zhifeng Wang
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 2302 MHRC, Chapel Hill, North Carolina 27599-7461, United States
- School of Environmental Science and Engineering, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100, China
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 2302 MHRC, Chapel Hill, North Carolina 27599-7461, United States
| | - Stanislav Musil
- Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Veveří97, Brno 602 00, Czech Republic
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 2302 MHRC, Chapel Hill, North Carolina 27599-7461, United States
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Xu H, Medina S, Lauer FT, Douillet C, Liu KJ, Stýblo M, Burchiel SW. Genotoxicity induced by monomethylarsonous acid (MMA +3) in mouse thymic developing T cells. Toxicol Lett 2017; 279:60-66. [PMID: 28760575 DOI: 10.1016/j.toxlet.2017.07.897] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/17/2017] [Accepted: 07/27/2017] [Indexed: 02/08/2023]
Abstract
Drinking water exposure to arsenic is known to cause immunotoxicity. Our previous studies demonstrated that monomethylarsonous acid (MMA+3) was the major arsenical species presented in mouse thymus cells after a 30 d drinking water exposure to arsenite (As+3). MMA+3 was also showed to be ten times more toxic than As+3 on the suppression of IL-7/STAT5 signaling in the double negative (DN) thymic T cells. In order to examine the genotoxicity induced by low to moderate doses of MMA+3, isolated mouse thymus cells were treated with 5, 50 and 500nMMMA+3 for 18h in vitro. MMA+3 suppressed the proliferation of thymus cells in a dose dependent manner. MMA+3 at 5nM induced DNA damage in DN not double positive (DP) cells. Differential sensitivity to double strand breaks and reactive oxygen species generation was noticed between DN and DP cells at 50nM, but the effects were not seen at the high dose (500nM). A stronger apoptotic effect induced by MMA+3 was noticed in DN cells than DP cells at low doses (5 and 50nM), which was negated by the strong apoptosis induction at the high dose (500nM). Analysis of intracellular MMA+3 concentrations in DN and DP cells, revealed that more MMA+3 accumulated in the DN cells after the in vitro treatment. Collectively, these results suggested that MMA+3 could directly induce strong genotoxicity in the early developing T cells in the thymus. The DN cells were much more sensitive to MMA+3 induced genotoxicity and apoptosis than DP cells, probably due to the higher intracellular levels of MMA+3.
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Affiliation(s)
- Huan Xu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States.
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25
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Huber CS, Vale MGR, Dessuy MB, Svoboda M, Musil S, Dědina J. Sample preparation for arsenic speciation analysis in baby food by generation of substituted arsines with atomic absorption spectrometry detection. Talanta 2017; 175:406-412. [PMID: 28842009 DOI: 10.1016/j.talanta.2017.07.055] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 11/18/2022]
Abstract
A slurry sampling procedure for arsenic speciation analysis in baby food by arsane generation, cryogenic trapping and detection with atomic absorption spectrometry is presented. Several procedures were tested for slurry preparation, including different reagents (HNO3, HCl and tetramethylammonium hydroxide - TMAH) and their concentrations, water bath heating and ultrasound-assisted agitation. The best results for inorganic arsenic (iAs) and dimethylarsinate (DMA) were reached when using 3molL-1 HCl under heating and ultrasound-assisted agitation. The developed method was applied for the analysis of five porridge powder and six baby meal samples. The trueness of the method was checked with a certified reference material (CRM) of total arsenic (tAs), iAs and DMA in rice (ERM-BC211). Arsenic recoveries (mass balance) for all samples and CRM were performed by the determination of the tAs by inductively coupled plasma mass spectrometry (ICP-MS) after microwave-assisted digestion and its comparison against the sum of the results from the speciation analysis. The relative limits of detection were 0.44, 0.24 and 0.16µgkg-1 for iAs, methylarsonate and DMA, respectively. The concentrations of the most toxic arsenic species (iAs) in the analyzed baby food samples ranged between 4.2 and 99µgkg-1 which were below the limits of 300, 200 and 100µgkg-1 set by the Brazilian, Chinese and European legislation, respectively.
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Affiliation(s)
- Charles S Huber
- Instituto Federal Sul-rio-grandense, Campus Pelotas, Praça Vinte de Setembro 455, Centro, 96015-360 Pelotas, RS, Brazil; Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves 9500, Agronomia, 91509-900 Porto Alegre, RS, Brazil; Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic.
| | - Maria Goreti R Vale
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves 9500, Agronomia, 91509-900 Porto Alegre, RS, Brazil
| | - Morgana B Dessuy
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves 9500, Agronomia, 91509-900 Porto Alegre, RS, Brazil
| | - Milan Svoboda
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
| | - Stanislav Musil
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
| | - Jiři Dědina
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
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26
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Chemical generation of volatile species of copper – Optimization, efficiency and investigation of volatile species nature. Anal Chim Acta 2017; 977:10-19. [DOI: 10.1016/j.aca.2017.05.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/04/2017] [Accepted: 05/08/2017] [Indexed: 11/23/2022]
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Xu H, Medina S, Lauer FT, Douillet C, Liu KJ, Hudson LG, Stýblo M, Aleksunes LM, Burchiel SW. Efflux Transporters Regulate Arsenite-Induced Genotoxicity in Double Negative and Double Positive T Cells. Toxicol Sci 2017; 158:127-139. [PMID: 28472378 PMCID: PMC6257016 DOI: 10.1093/toxsci/kfx075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Arsenite (As+3) exposure is known to cause immunotoxicity in human and animal models. Our previous studies demonstrated that As+3 at 50-500 nM concentrations induced both genotoxicity and nongenotoxicity in mouse thymus cells. Developing T cells at CD4-CD8- double negative (DN) stage, the first stage after early T cells are transported from bone marrow to thymus, were found to be more sensitive to As+3 toxicity than the T cells at CD4 + CD8 + double positive (DP) stage in vitro. Induction of Mdr1 (Abcb1) and Mrp1 (Abcc1), 2 multidrug resistance transporters and exporters of As+3, was associated with the reversal of As+3-induced double strand breaks and DNA damage. In order to confirm that the thymus cell populations have different sensitivity to As+3in vivo, male C57BL/6J mice were exposed to 0, 100, and 500 ppb As+3 in drinking water for 30 d. A significant decrease in DN cell percentage was observed with exposure to 500 ppb As+3. Low to moderate concentrations of As+3 were shown to induce higher genotoxicity in sorted DN than DP cells in vitro. Calcein AM uptake and Mdr1/Mrp1 mRNA quantification results revealed that DN cells not only had limited As+3 exporter activity, but also lacked the ability to activate these exporters with As+3 treatments, resulting in a higher accumulation of intracellular As+3. Knockdown study of As+3 exporters in the DN thymic cell line, D1 using siRNA, demonstrated that Mdr1 and Mrp1 regulate intracellular As+3 accumulation and genotoxicity. Taken together, the results indicate that transporter regulation is an important mechanism for differential genotoxicity induced by As+3 in thymocytes at different developmental stages.
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Affiliation(s)
- Huan Xu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Sebastian Medina
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Fredine T. Lauer
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Laurie G. Hudson
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Lauren M. Aleksunes
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Scott W. Burchiel
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
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28
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Laine JE, Bailey KA, Olshan AF, Smeester L, Drobná Z, Stýblo M, Douillet C, García-Vargas G, Rubio-Andrade M, Pathmasiri W, McRitchie S, Sumner SJ, Fry RC. Neonatal Metabolomic Profiles Related to Prenatal Arsenic Exposure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:625-633. [PMID: 27997141 PMCID: PMC5460981 DOI: 10.1021/acs.est.6b04374] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Prenatal inorganic arsenic (iAs) exposure is associated with health effects evident at birth and later in life. An understanding of the relationship between prenatal iAs exposure and alterations in the neonatal metabolome could reveal critical molecular modifications, potentially underpinning disease etiologies. In this study, nuclear magnetic resonance (NMR) spectroscopy-based metabolomic analysis was used to identify metabolites in neonate cord serum associated with prenatal iAs exposure in participants from the Biomarkers of Exposure to ARsenic (BEAR) pregnancy cohort, in Gómez Palacio, Mexico. Through multivariable linear regression, ten cord serum metabolites were identified as significantly associated with total urinary iAs and/or iAs metabolites, measured as %iAs, %monomethylated arsenicals (MMAs), and %dimethylated arsenicals (DMAs). A total of 17 metabolites were identified as significantly associated with total iAs and/or iAs metabolites in cord serum. These metabolites are indicative of changes in important biochemical pathways such as vitamin metabolism, the citric acid (TCA) cycle, and amino acid metabolism. These data highlight that maternal biotransformation of iAs and neonatal levels of iAs and its metabolites are associated with differences in neonate cord metabolomic profiles. The results demonstrate the potential utility of metabolites as biomarkers/indicators of in utero environmental exposure.
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Affiliation(s)
- Jessica E. Laine
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Kathryn A. Bailey
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Andrew F. Olshan
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Lisa Smeester
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Zuzana Drobná
- Department of Biological Sciences, College of Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Gonzalo García-Vargas
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango 35050, Mexico
| | - Marisela Rubio-Andrade
- Facultad de Medicina, Universidad Juarez del Estado de Durango, Gómez Palacio, Durango 35050, Mexico
| | - Wimal Pathmasiri
- RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Susan McRitchie
- RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Susan J. Sumner
- RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Rebecca C. Fry
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States
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Grau-Pérez M, Kuo CC, Spratlen M, Thayer KA, Mendez MA, Hamman RF, Dabelea D, Adgate JL, Knowler WC, Bell RA, Miller FW, Liese AD, Zhang C, Douillet C, Drobná Z, Mayer-Davis EJ, Styblo M, Navas-Acien A. The Association of Arsenic Exposure and Metabolism With Type 1 and Type 2 Diabetes in Youth: The SEARCH Case-Control Study. Diabetes Care 2017; 40:46-53. [PMID: 27810988 PMCID: PMC5180459 DOI: 10.2337/dc16-0810] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 10/13/2016] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Little is known about arsenic and diabetes in youth. We examined the association of arsenic with type 1 and type 2 diabetes in the SEARCH for Diabetes in Youth Case-Control (SEARCH-CC) study. Because one-carbon metabolism can influence arsenic metabolism, we also evaluated the potential interaction of folate and vitamin B12 with arsenic metabolism on the odds of diabetes. RESEARCH DESIGN AND METHODS Six hundred eighty-eight participants <22 years of age (429 with type 1 diabetes, 85 with type 2 diabetes, and 174 control participants) were evaluated. Arsenic species (inorganic arsenic [iAs], monomethylated arsenic [MMA], dimethylated arsenic [DMA]), and one-carbon metabolism biomarkers (folate and vitamin B12) were measured in plasma. We used the sum of iAs, MMA, and DMA (∑As) and the individual species as biomarkers of arsenic concentrations and the relative proportions of the species over their sum (iAs%, MMA%, DMA%) as biomarkers of arsenic metabolism. RESULTS Median ∑As, iAs%, MMA%, and DMA% were 83.1 ng/L, 63.4%, 10.3%, and 25.2%, respectively. ∑As was not associated with either type of diabetes. The fully adjusted odds ratios (95% CI), rescaled to compare a difference in levels corresponding to the interquartile range of iAs%, MMA%, and DMA%, were 0.68 (0.50-0.91), 1.33 (1.02-1.74), and 1.28 (1.01-1.63), respectively, for type 1 diabetes and 0.82 (0.48-1.39), 1.09 (0.65-1.82), and 1.17 (0.77-1.77), respectively, for type 2 diabetes. In interaction analysis, the odds ratio of type 1 diabetes by MMA% was 1.80 (1.25-2.58) and 0.98 (0.70-1.38) for participants with plasma folate levels above and below the median (P for interaction = 0.02), respectively. CONCLUSIONS Low iAs% versus high MMA% and DMA% was associated with a higher odds of type 1 diabetes, with a potential interaction by folate levels. These data support further research on the role of arsenic metabolism in type 1 diabetes, including the interplay with one-carbon metabolism biomarkers.
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Affiliation(s)
- Maria Grau-Pérez
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD .,Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY
| | - Chin-Chi Kuo
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Kidney Institute and Division of Nephrology, Department of Internal Medicine, China Medical University Hospital and College of Medicine, China Medical University, Taichung, Taiwan
| | - Miranda Spratlen
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Kristina A Thayer
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC
| | - Michelle A Mendez
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
| | - Richard F Hamman
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver, Aurora, CO
| | - Dana Dabelea
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver, Aurora, CO
| | - John L Adgate
- Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Denver, Aurora, CO
| | - William C Knowler
- Diabetes Epidemiology and Clinical Research Section, National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, AZ
| | - Ronny A Bell
- Wake Forest School of Medicine, Winston-Salem, NC
| | - Frederick W Miller
- National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - Angela D Liese
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC
| | - Chongben Zhang
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
| | - Christelle Douillet
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
| | - Zuzana Drobná
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC.,Department of Biological Sciences, North Carolina State University, Raleigh, NC
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC.,Deparment of Medicine, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
| | - Miroslav Styblo
- Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD .,Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Medical Institutions, Baltimore, MD
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Llorente-Mirandes T, Rubio R, López-Sánchez JF. Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years. APPLIED SPECTROSCOPY 2017; 71:25-69. [PMID: 28033722 DOI: 10.1177/0003702816652374] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food commodities, wine, and seaweed among others is fueled by the wide recognition of its toxic effects on humans, even at low concentrations. Currently, the need for robust and reliable analytical methods is recognized by various international safety and health agencies, and by organizations in charge of establishing acceptable tolerance levels of iAs in food. This review summarizes the state of the art of analytical methods while highlighting tools for the assessment of quality assessment of the results, such as the production and evaluation of certified reference materials (CRMs) and the availability of specific proficiency testing (PT) programmes. Because the number of studies dedicated to the subject of this review has increased considerably over recent years, the sources consulted and cited here are limited to those from 2010 to the end of 2015.
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Affiliation(s)
| | - Roser Rubio
- Department of Analytical Chemistry, University of Barcelona, Spain
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31
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Yang XA, Lu XP, Liu L, Chi MB, Hu HH, Zhang WB. Selective determination of four arsenic species in rice and water samples by modified graphite electrode-based electrolytic hydride generation coupled with atomic fluorescence spectrometry. Talanta 2016; 159:127-136. [DOI: 10.1016/j.talanta.2016.06.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/29/2016] [Accepted: 06/05/2016] [Indexed: 01/19/2023]
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32
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Xu H, McClain S, Medina S, Lauer FT, Douillet C, Liu KJ, Hudson LG, Stýblo M, Burchiel SW. Differential sensitivities of bone marrow, spleen and thymus to genotoxicity induced by environmentally relevant concentrations of arsenite. Toxicol Lett 2016; 262:55-61. [PMID: 27659730 DOI: 10.1016/j.toxlet.2016.09.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/08/2016] [Accepted: 09/17/2016] [Indexed: 01/28/2023]
Abstract
It is known in humans and mouse models, that drinking water exposures to arsenite (As+3) leads to immunotoxicity. Previously, our group showed that certain types of immune cells are extremely sensitive to arsenic induced genotoxicity. In order to see if cells from different immune organs have differential sensitivities to As+3, and if the sensitivities correlate with the intracellular concentrations of arsenic species, male C57BL/6J mice were dosed with 0, 100 and 500ppb As+3via drinking water for 30d. Oxidation State Specific Hydride Generation- Cryotrapping- Inductively Coupled Plasma- Mass Spectrometry (HG- CT- ICP- MS) was applied to analyze the intracellular arsenic species and concentrations in bone marrow, spleen and thymus cells isolated from the exposed mice. A dose-dependent increase in intracellular monomethylarsonous acid (MMA+3) was observed in both bone marrow and thymus cells, but not spleen cells. The total arsenic and MMA+3 levels were correlated with an increase in DNA damage in bone marrow and thymus cells. An in vitro treatment of 5, 50 and 500nM As+3 and MMA+3 revealed that bone marrow cells are most sensitive to As+3 treatment, and MMA+3 is more genotoxic than As+3. These results suggest that the differential sensitivities of the three immune organs to As+3 exposure are due to the different intracellular arsenic species and concentrations, and that MMA+3 may play a critical role in immunotoxicity.
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Affiliation(s)
- Huan Xu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Shea McClain
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Laurie G Hudson
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States.
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Marschner K, Musil S, Dědina J. Demethylation of Methylated Arsenic Species during Generation of Arsanes with Tetrahydridoborate(1−) in Acidic Media. Anal Chem 2016; 88:6366-73. [DOI: 10.1021/acs.analchem.6b00735] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karel Marschner
- Institute
of Analytical
Chemistry of the CAS, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
- Department
of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 8, 128 43 Prague, Czech Republic
| | - Stanislav Musil
- Institute
of Analytical
Chemistry of the CAS, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Jiří Dědina
- Institute
of Analytical
Chemistry of the CAS, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
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Rager JE, Tilley SK, Tulenko SE, Smeester L, Ray PD, Yosim A, Currier JM, Ishida MC, González-Horta MDC, Sánchez-Ramírez B, Ballinas-Casarrubias L, Gutiérrez-Torres DS, Drobná Z, Del Razo LM, García-Vargas GG, Kim WY, Zhou YH, Wright FA, Stýblo M, Fry RC. Identification of novel gene targets and putative regulators of arsenic-associated DNA methylation in human urothelial cells and bladder cancer. Chem Res Toxicol 2015; 28:1144-55. [PMID: 26039340 DOI: 10.1021/tx500393y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
There is strong epidemiologic evidence linking chronic exposure to inorganic arsenic (iAs) to myriad adverse health effects, including cancer of the bladder. We set out to identify DNA methylation patterns associated with arsenic and its metabolites in exfoliated urothelial cells (EUCs) that originate primarily from the urinary bladder, one of the targets of arsenic-induced carcinogenesis. Genome-wide, gene-specific promoter DNA methylation levels were assessed in EUCs from 46 residents of Chihuahua, Mexico, and the relationship was examined between promoter methylation profiles and the intracellular concentrations of total arsenic and arsenic species. A set of 49 differentially methylated genes was identified with increased promoter methylation associated with EUC tAs, iAs, and/or monomethylated As (MMAs) enriched for their roles in metabolic disease and cancer. Notably, no genes had differential methylation associated with EUC dimethylated As (DMAs), suggesting that DMAs may influence DNA methylation-mediated urothelial cell responses to a lesser extent than iAs or MMAs. Further analysis showed that 22 of the 49 arsenic-associated genes (45%) are also differentially methylated in bladder cancer tissue identified using The Cancer Genome Atlas repository. Both the arsenic- and cancer-associated genes are enriched for the binding sites of common transcription factors known to play roles in carcinogenesis, demonstrating a novel potential mechanistic link between iAs exposure and bladder cancer.
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Affiliation(s)
- Julia E Rager
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States
| | - Sloane K Tilley
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States
| | - Samantha E Tulenko
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States
| | - Lisa Smeester
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States
| | - Paul D Ray
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States.,‡Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Andrew Yosim
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States
| | - Jenna M Currier
- ‡Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - María C Ishida
- §Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua 31125, México
| | | | - Blanca Sánchez-Ramírez
- §Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua 31125, México
| | | | | | - Zuzana Drobná
- ∥Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Luz M Del Razo
- ⊥Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México, DF 07360, México
| | - Gonzalo G García-Vargas
- #Facultad de Medicina, Universidad Juárez del Estado de Durango, Gómez Palacio, Durango 34000, México
| | - William Y Kim
- ○Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
| | | | | | - Miroslav Stýblo
- ‡Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.,∥Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Rebecca C Fry
- †Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, United States.,‡Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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Gil RA, Pacheco PH, Cerutti S, Martinez LD. Vapor generation – atomic spectrometric techniques. Expanding frontiers through specific-species preconcentration. A review. Anal Chim Acta 2015; 875:7-21. [DOI: 10.1016/j.aca.2014.12.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 12/09/2014] [Accepted: 12/17/2014] [Indexed: 12/21/2022]
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Musil S, Matoušek T, Currier JM, Stýblo M, Dědina J. Speciation analysis of arsenic by selective hydride generation-cryotrapping-atomic fluorescence spectrometry with flame-in-gas-shield atomizer: achieving extremely low detection limits with inexpensive instrumentation. Anal Chem 2014; 86:10422-8. [PMID: 25300934 PMCID: PMC4204903 DOI: 10.1021/ac502931k] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work describes the method of a selective hydride generation-cryotrapping (HG-CT) coupled to an extremely sensitive but simple in-house assembled and designed atomic fluorescence spectrometry (AFS) instrument for determination of toxicologically important As species. Here, an advanced flame-in-gas-shield atomizer (FIGS) was interfaced to HG-CT and its performance was compared to a standard miniature diffusion flame (MDF) atomizer. A significant improvement both in sensitivity and baseline noise was found that was reflected in improved (4 times) limits of detection (LODs). The yielded LODs with the FIGS atomizer were 0.44, 0.74, 0.15, 0.17 and 0.67 ng L(-1) for arsenite, total inorganic, mono-, dimethylated As and trimethylarsine oxide, respectively. Moreover, the sensitivities with FIGS and MDF were equal for all As species, allowing for the possibility of single species standardization with arsenate standard for accurate quantification of all other As species. The accuracy of HG-CT-AFS with FIGS was verified by speciation analysis in two samples of bottled drinking water and certified reference materials, NRC CASS-5 (nearshore seawater) and SLRS-5 (river water) that contain traces of methylated As species. As speciation was in agreement with results previously reported and sums of all quantified species corresponded with the certified total As. The feasibility of HG-CT-AFS with FIGS was also demonstrated by the speciation analysis in microsamples of exfoliated bladder epithelial cells isolated from human urine. The results for the sums of trivalent and pentavalent As species corresponded well with the reference results obtained by HG-CT-ICPMS (inductively coupled plasma mass spectrometry).
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Affiliation(s)
- Stanislav Musil
- Institute of Analytical Chemistry of the ASCR , v. v. i., Veveří 97, 602 00 Brno, Czech Republic
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Currier JM, Ishida MC, González-Horta C, Sánchez-Ramírez B, Ballinas-Casarrubias L, Gutiérrez-Torres DS, Cerón RH, Morales DV, Terrazas FAB, Del Razo LM, García-Vargas GG, Saunders RJ, Drobná Z, Fry RC, Matoušek T, Buse JB, Mendez MA, Loomis D, Stýblo M. Associations between arsenic species in exfoliated urothelial cells and prevalence of diabetes among residents of Chihuahua, Mexico. ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:1088-94. [PMID: 25000461 PMCID: PMC4181927 DOI: 10.1289/ehp.1307756] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 06/26/2014] [Indexed: 05/14/2023]
Abstract
BACKGROUND A growing number of studies link chronic exposure to inorganic arsenic (iAs) with the risk of diabetes. Many of these studies assessed iAs exposure by measuring arsenic (As) species in urine. However, this approach has been criticized because of uncertainties associated with renal function and urine dilution in diabetic individuals. OBJECTIVES Our goal was to examine associations between the prevalence of diabetes and concentrations of As species in exfoliated urothelial cells (EUC) as an alternative to the measures of As in urine. METHODS We measured concentrations of trivalent and pentavalent iAs methyl-As (MAs) and dimethyl-As (DMAs) species in EUC from 374 residents of Chihuahua, Mexico, who were exposed to iAs in drinking water. We used fasting plasma glucose, glucose tolerance tests, and self-reported diabetes diagnoses or medication to identify diabetic participants. Associations between As species in EUC and diabetes were estimated using logistic and linear regression, adjusting for age, sex, and body mass index. RESULTS Interquartile-range increases in trivalent, but not pentavalent, As species in EUC were positively and significantly associated with diabetes, with ORs of 1.57 (95% CI: 1.19, 2.07) for iAsIII, 1.63 (1.24, 2.15) for MAsIII, and 1.31 (0.96, 1.84) for DMAsIII. DMAs/MAs and DMAs/iAs ratios were negatively associated with diabetes (OR = 0.62; 95% CI: 0.47, 0.83 and OR = 0.72; 95% CI: 0.55, 0.96, respectively). CONCLUSIONS Our data suggest that uncertainties associated with measures of As species in urine may be avoided by using As species in EUC as markers of iAs exposure and metabolism. Our results provide additional support to previous findings suggesting that trivalent As species may be responsible for associations between diabetes and chronic iAs exposure.
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Affiliation(s)
- Jenna M Currier
- Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Chen ML, Ma LY, Chen XW. New procedures for arsenic speciation: A review. Talanta 2014; 125:78-86. [DOI: 10.1016/j.talanta.2014.02.037] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 02/18/2014] [Accepted: 02/18/2014] [Indexed: 10/25/2022]
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Pitzalis E, Onor M, Mascherpa MC, Pacchi G, Mester Z, D'Ulivo A. Chemical generation of arsane and methylarsanes with amine boranes. Potentialities for nonchromatographic speciation of arsenic. Anal Chem 2014; 86:1599-607. [PMID: 24428590 DOI: 10.1021/ac4032466] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The efficiency of chemical generation of arsanes from inorganic arsenic, monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA), to arsane, AsH3, monomethylarsane, CH3AsH2 (MMA), and dimethylarsane, (CH3)2AsH (DMA), has been investigated in different reaction media with the aim to better elucidate the mechanisms controlling their generation process and to find the experimental conditions to implement a nonchromatographic arsenic speciation analytical method, which is based on the selective determination of some arsenic species. Studies were performed by continuous flow hydride generation coupled with atomic spectrometry (CF-HG-AS), using different reductants such as borane-ammonia (AB), borane-tert-butylamine (TBAB), and sodium tetrahydridoborate (THB) in HCl and HClO4 media, in the presence or absence of L-cysteine (Cys). The efficiency of HG processes for MMA and DMA is mainly controlled by the reactivity of the substrates with the borane, which could be strongly influenced by the formation of ion couples. The protonation of arsane did not play a significant role in the employed reaction system. By taking advantage of the different reactivity pattern of As species in selected generation conditions, DMAA and MMAA could be selectively determined in 0.5 and 10 M HClO4 solutions, respectively, in the presence of Cys, with AB as the reducing agent. The presence of Cys as a masking agent and the peculiar reducing properties of AB ensured a good control of interferences, as far as it has been observed for Co(II), Ni(II), Cu(II), Fe(II), Fe(III). The overall time needed to complete the prereduction step has been verified for MMAA and DMAA at different acidities in order to achieve the best selectivity. The selective determination of DMAA with AB/Cys in HClO4 has been optimized and applied to certified reference materials (CRMs) of natural waters CASS-4, SLRS-4, and NASS-4 (NRCC). The estimation of DMAA concentration allows us to correct the concentration of As(III) for the interference of DMAA in the selective determination of As(III) according to a selective HG method recently reported.
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Affiliation(s)
- Emanuela Pitzalis
- C.N.R., Consiglio Nazionale delle Ricerche, Institute of Chemistry of OrganoMetallic Compounds, Via G. Moruzzi 1, 56124 Pisa, Italy
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