1
|
Shan D, Yu H, Yang Z, Li H, Jia R, Zhang Y. Nitrogen-doped carbon quantum dots (NCQDs) detected to mercury ions in food monitoring. Food Chem 2024; 463:141308. [PMID: 39298854 DOI: 10.1016/j.foodchem.2024.141308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 09/02/2024] [Accepted: 09/13/2024] [Indexed: 09/22/2024]
Abstract
Using 2,3-diaminopyridine and citric acid as precursors, blue fluorescent nitrogen-doped carbon quantum dots (NCQDs) with a narrow size distribution (∼7.2 nm) were prepared and applied in the following assay for mercury ion detection at a weight ratio of 2,3-diaminopyridine:citric acid = 1:1 (0.2 g: 0.2 g, 20 mL for H2O), 220 °C, and 10 h. NCQDs was characterized by TEM, FT-IR, XPS, UV-Vis and EDS, and the prepared NCQDs display excitation-independent behavior due to less surface defects and uniform size. The optimal excitation and emission wavelengths of the NCQDs were 380 nm and 430 nm, respectively. Interestingly, the fluorescence of the NCQDs could be rapidly and selectively quenched by Hg2+ within 9 min at room temperature without further modification. Under optimal conditions, the limit of detection (LOD) was measured to be at the nanomolar level (42.4 nmol/L) with a linear range of 0-5.0 μmol/L, and fluorescence analysis of NCQDs was successfully used for the qualitative and quantitative analysis of mercury ions in food samples. Furthermore, our results revealed that fluorescence quenching occurred under the common fluences of the inner filter effect, and the static quenching effect was authenticated in the process in which Hg2+ coordinates with the NCQDs to form nonfluorescent complexes.
Collapse
Affiliation(s)
- Di Shan
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China
| | - Huichuan Yu
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China
| | - Zhichao Yang
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China
| | - Hongda Li
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China.
| | - Rulin Jia
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China
| | - Yue Zhang
- School of Forensic Science and Technology, Criminal Investigation Police University of China, Liaoning, Shenyang 110035, China
| |
Collapse
|
2
|
Rothenberg SE, Korrick SA, Harrington D, Thurston SW, Janssen SE, Tate MT, Nong Y, Nong H, Liu J, Hong C, Ouyang F. Hair mercury isotopes, a noninvasive biomarker for dietary methylmercury exposure and biological uptake. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024. [PMID: 39193654 DOI: 10.1039/d4em00231h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Background. Fish and rice are the main dietary sources of methylmercury (MeHg); however, rice does not contain the same beneficial nutrients as fish, and these differences can impact the observed health effects of MeHg. Hence, it is important to validate a biomarker, which can distinguish among dietary MeHg sources. Methods. Mercury (Hg) stable isotopes were analyzed in hair samples from peripartum mothers in China (n = 265). Associations between mass dependent fractionation (MDF) (δ202Hg) and mass independent fractionation (MIF) (Δ199Hg) (dependent variables) and dietary MeHg intake (independent variable) were investigated using multivariable regression models. Results. In adjusted models, hair Δ199Hg was positively correlated with serum omega-3 fatty acids (a biomarker for fish consumption) and negatively correlated with maternal rice MeHg intake, indicating MIF recorded in hair can be used to distinguish MeHg intake predominantly from fish versus rice. Conversely, in adjusted models, hair δ202Hg was not correlated with measures of dietary measures of MeHg intake. Instead, hair δ202Hg was strongly, negatively correlated with hair Hg, which explained 27-29% of the variability in hair δ202Hg. Conclusions. Our results indicated that hair Δ199Hg can be used to distinguish MeHg intake from fish versus rice. Results also suggested that lighter isotopes were preferentially accumulated in hair, potentially reflecting Hg binding to thiols (i.e., cysteine); however, more research is needed to elucidate this hypothesis. Broader impacts include 1) validation of a non-invasive biomarker to distinguish MeHg intake from rice versus fish, and 2) the potential to use Hg isotopes to investigate Hg binding in tissues.
Collapse
Affiliation(s)
- Sarah E Rothenberg
- College of Health, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA.
| | - Susan A Korrick
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, 02115, USA
| | - Donald Harrington
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Sally W Thurston
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Sarah E Janssen
- U.S. Geological Survey Upper Midwest Water Science Center, Madison, WI, 53726, USA
| | - Michael T Tate
- U.S. Geological Survey Upper Midwest Water Science Center, Madison, WI, 53726, USA
| | - YanFen Nong
- Maternal and Child Health Hospital, Daxin County, China
| | - Hua Nong
- Maternal and Child Health Hospital, Daxin County, China
| | - Jihong Liu
- Department of Epidemiology & Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, 29208, USA
| | - Chuan Hong
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, 29208, USA
| | - Fengxiu Ouyang
- Ministry of Education and Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
3
|
Spanu D, Butti L, Recchia S, Dossi C, Monticelli D. A high-throughput, straightforward procedure for biomonitoring organomercury species in human hair. Talanta 2024; 270:125612. [PMID: 38169277 DOI: 10.1016/j.talanta.2023.125612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/21/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
Mercury is a pervasive and concerning pollutant due to its toxicity, mobility, and tendency to biomagnify in aquatic and terrestrial ecosystems. Speciation analysis is crucial to assess exposure and risks associated with mercury, as different mercury species exhibit varying properties and toxicities. This study aimed at developing a selective detection method for organic mercury species in a non-invasive biomonitoring matrix like human hair. The method is based on frontal chromatography (FC) in combination with inductively coupled plasma mass spectrometry (ICP-MS), using a low pressure, homemade, anion exchange column inserted in a standard ICP-MS introduction system, without requiring high-performance liquid chromatography (HPLC) hyphenation. In addition to the extreme simplification and cost reduction of the chromatographic equipment, the proposed protocol involves a fast, streamlined and fully integrated sample preparation process (in contrast to existing methods): the optimized procedure features a 15-min ultrasonic assisted extraction procedure and 5 min analysis time. Consequently, up to 100 samples could be analyzed daily, making the method highly productive and suitable for large-scale screening programs in public and environmental health. Moreover, the optimized procedure enables a limit of detection (LOD) of 5.5 μg/kg for a 10 mg hair microsample. All these features undeniably demonstrate a significant advancement in routine biomonitoring practices. To provide additional evidence, the method was applied to forty-nine human hair samples from individuals with varying dietary habits successfully finding a clear correlation between methylmercury levels (ranging from 0.02 to 3.2 mg/kg) in hair and fish consumption, in line with previous literature data.
Collapse
Affiliation(s)
- Davide Spanu
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, 22100, Italy
| | - Laura Butti
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, 22100, Italy
| | - Sandro Recchia
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, 22100, Italy
| | - Carlo Dossi
- Department of Theoretical and Applied Science, University of Insubria, Via J.H. Dunant 3, Varese, 21100, Italy
| | - Damiano Monticelli
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, 22100, Italy.
| |
Collapse
|
4
|
Zhu D, Yao W, Ren A. A Reaction-Based ESIPT Fluorescent Probe for the Detection of Hg 2+ with Large Stokes Shift. J Fluoresc 2023:10.1007/s10895-023-03508-5. [PMID: 37987982 DOI: 10.1007/s10895-023-03508-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023]
Abstract
A novel reaction-based fluorescent probe 1 for Hg2+ was designed and synthesized. 1 was almost nonfluoresent due to inhibition of the ESIPT process between hydroxy group and imid carbonyl oxygen by diphenylphosphinothioate group. After reacting with Hg2+, the fluorescence intensity of 1 exhibited significant enhancement owing to recovery of the ESIPT process via Hg2+-promoted desulfurization-hydrolysis of the diphenylphosphinothioate moiety and cleavage of the P-O bond. 1 not only showed rapid response, high sensitivity, excellent selectivity for Hg2+ over other metal ions, but also could detect Hg2+ with large Stokes shift (165 nm), which was attributed to the ESIPT process. Moreover, the reaction mechanism was fully validated by absorption spectra, fluorescence spectra, fluorescence color as well as ESI-MS analysis. 1 is the reaction-based ESIPT fluorescent probe for the detection of Hg2+ with large Stokes shift, rapid response, high sensitivity and selectivity.
Collapse
Affiliation(s)
- Dongjian Zhu
- Guangxi Key Laboratory of Health Care Food Science and Technology, College of Food and Bioengineering, Hezhou University, Hezhou, 542899, People's Republic of China
| | - Wenqin Yao
- Guangxi Key Laboratory of Health Care Food Science and Technology, College of Food and Bioengineering, Hezhou University, Hezhou, 542899, People's Republic of China
- College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545005, People's Republic of China
| | - Aishan Ren
- Guangxi Key Laboratory of Health Care Food Science and Technology, College of Food and Bioengineering, Hezhou University, Hezhou, 542899, People's Republic of China.
| |
Collapse
|
5
|
Treu G, Sinding MHS, Czirják GÁ, Dietz R, Gräff T, Krone O, Marquard-Petersen U, Mikkelsen JB, Schulz R, Sonne C, Søndergaard J, Sun J, Zubrod J, Eulaers I. An assessment of mercury and its dietary drivers in fur of Arctic wolves from Greenland and High Arctic Canada. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156171. [PMID: 35613645 DOI: 10.1016/j.scitotenv.2022.156171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Mercury has become a ubiquitous hazardous element even ending up in pristine areas such as the Arctic, where it biomagnifies and leaves especially top predators vulnerable to potential health effects. Here we investigate total mercury (THg) concentrations and dietary proxies for trophic position and habitat foraging (δ15N and δ13C, respectively) in fur of 30 Arctic wolves collected during 1869-1998 in the Canadian High Arctic and Greenland. Fur THg concentrations (mean ± SD) of 1.46 ± 1.39 μg g -1 dry weight are within the range of earlier reported values for other Arctic terrestrial species. Based on putative thresholds for Hg-mediated toxic health effects, the studied Arctic wolves have most likely not been at compromised health. Dietary proxies show high dietary plasticity among Arctic wolves deriving nutrition from both marine and terrestrial food sources at various trophic positions. Variability in THg concentrations seem to be related to the wolves' trophic position rather than to different carbon sources or regional differences (East Greenland, the Foxe Basin and Baffin Bay area, respectively). Although the present study remains limited due to the scarce, yet unique historic study material and small sample size, it provides novel information on temporal and spatial variation in Hg pollution of remote Arctic species.
Collapse
Affiliation(s)
- Gabriele Treu
- German Environment Agency, Department Chemicals, DE-06844 Dessau-Roßlau, Germany; Leibniz Institute for Zoo and Wildlife Research, Department of Wildlife Diseases, DE-10315 Berlin, Germany.
| | - Mikkel-Holger S Sinding
- Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen, Denmark; Greenland Institute of Natural Resources, Kivioq 2, Nuuk, Greenland
| | - Gábor Á Czirják
- Leibniz Institute for Zoo and Wildlife Research, Department of Wildlife Diseases, DE-10315 Berlin, Germany
| | - Rune Dietz
- Department of Ecoscience, Arctic Research Centre, Aarhus University, DK-4000 Roskilde, Denmark
| | - Thomas Gräff
- German Environment Agency, Department Systems on Chemical Safety, DE-6844 Dessau-Roßlau, Germany
| | - Oliver Krone
- Leibniz Institute for Zoo and Wildlife Research, Department of Wildlife Diseases, DE-10315 Berlin, Germany
| | | | | | - Ralf Schulz
- iES Landau, Institute for Environmental Sciences, University of Koblenz-Landau, DE-76829 Landau, Germany
| | - Christian Sonne
- Department of Ecoscience, Arctic Research Centre, Aarhus University, DK-4000 Roskilde, Denmark
| | - Jens Søndergaard
- Department of Ecoscience, Arctic Research Centre, Aarhus University, DK-4000 Roskilde, Denmark
| | - Jiachen Sun
- College of Marine Life Sciences, Ocean University of China, CN-266003 Qingdao, China
| | - Jochen Zubrod
- iES Landau, Institute for Environmental Sciences, University of Koblenz-Landau, DE-76829 Landau, Germany; Zubrod Environmental Data Science, Friesenstrasse 20, 76829 Landau, Germany
| | - Igor Eulaers
- Department of Ecoscience, Arctic Research Centre, Aarhus University, DK-4000 Roskilde, Denmark; Fram Centre, Norwegian Polar Institute, NO-9296 Tromsø, Norway.
| |
Collapse
|
6
|
Acridine-2,4-Dinitrophenyl Hydrazone Conjugated Silver Nanoparticles as an Efficient Sensor for Quantification of Mercury in Tap Water. J CHEM-NY 2022. [DOI: 10.1155/2022/6823140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Excretion of heavy metals especially mercury (Hg2+) from the industries into the environment becomes a major global problem. In this context, mercury is a highly dangerous metal which poses serious impact on human health. In the present study, acridine- (ACR-) based silver nanoparticles (ACR-AgNPs) were prepared and employed as a nanosensor for effective detection and quantification of Hg2+ in tap water. Conjugation between ACR-based coating agent and silver was examined by UV-visible and FT-IR spectroscopy, while morphology and particle size were determined through atomic force microscopy (AFM), dynamic light scattering (DLS), and scanning electron microscopy (SEM). Furthermore, sensing behavior of nanosensor for metal ions was evaluated by mixing different metals such as Mn2+, Ni2+, Ba2+, Mg2+, Cr3+, Pb2+, Pd2+, Al3+, Sn2+, Fe2+, Co2+, Cu2+, Fe3+, Cd2+, and Hg2+with ACR-AgNPs. Among all the added metal ions, only Hg2+resulted in significant quenching in the absorption intensity of ACR-AgNPs. The limit of detection of the ACR-AgNP-based nanosensor was found to be 1.65 μM in a wide pH range (1-14). The proposed mercury sensor worked efficiently in the presence of other interfering agents such as other metal ions. Therefore, the synthesized ACR-AgNPs have proved to be an efficient and robust nanosensor for quantitative detection of Hg2+ in real sample analysis such as tap water. The proposed method does not require expensive instrumentation and trained manpower.
Collapse
|
7
|
Ahmed F, Ali I, Saad Ali H, Yasmeen S, Ullah S, Burki S, Adil M, Nisar J, Shah MR. Synthesis and characterization of a plant growth regulator based silver nanoparticles for the ultrasensitive detection of environmentally toxic Hg 2+ ions in tap water. NEW J CHEM 2021. [DOI: 10.1039/d1nj03393j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the synthesis and characterization of a plant growth regulator based silver nanoparticles and its application as a sensor for the ultrasensitive detection of toxic metal ions (Hg2+) in tapwater.
Collapse
Affiliation(s)
- Farid Ahmed
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Imdad Ali
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 74200, Pakistan
| | - Heyam Saad Ali
- Pharmaceutical Department, Pharmacy College, University of Khartoum, Sudan
| | - Saira Yasmeen
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 74200, Pakistan
| | - Shafi Ullah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 74200, Pakistan
| | - Samiullah Burki
- Department of Pharmacology, Faculty of Pharmacy, Jinnah Sindh Medical University, Rafiqui H.J. Shaheed Road, Karachi 75510, Pakistan
| | - Muhammad Adil
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 74200, Pakistan
| | - Jan Nisar
- National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 74200, Pakistan
| |
Collapse
|
8
|
Sekovanić A, Piasek M, Orct T, Sulimanec Grgec A, Matek Sarić M, Stasenko S, Jurasović J. Mercury Exposure Assessment in Mother-Infant Pairs from Continental and Coastal Croatia. Biomolecules 2020; 10:biom10060821. [PMID: 32471193 PMCID: PMC7355586 DOI: 10.3390/biom10060821] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 12/31/2022] Open
Abstract
The main source of mercury (Hg) exposure in the general population is fish. Another possible source is dental amalgam. Here, we compare the levels of Hg and selenium (Se) in samples of maternal and fetal origin collected shortly after childbirth of healthy postpartum women in the coastal (n = 96) and continental (n = 185) areas of Croatia related to maternal seafood/fish consumption. We also evaluated Hg concentrations and maternal serum metallothionein (MT2) concentrations in relation to the number of dental amalgam fillings, and MT2A-5A/G (rs28366003) polymorphism. The levels of Hg and Se in maternal hair and blood/serum, placenta and cord blood/serum increased in relation to increasing fish consumption with the highest values in subjects from the coast. The concentrations of each element and between elements correlated across the matrices. Increasing amalgam number correlated linearly with increased Hg levels in maternal and cord serum and was not associated with serum MT2. No association of MT2A-5A/G polymorphism and Hg or Se levels were found. The results confirmed higher fish consumption in coastal vs. continental Croatia and increases of both Hg and Se related to fish consumption in all analyzed samples. Increased blood Hg reflected the predominant MeHg share from seafood, while increased serum Hg matched exposure from dental amalgams.
Collapse
Affiliation(s)
- Ankica Sekovanić
- Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (A.S.); (T.O.); (A.S.G.); (J.J.)
| | - Martina Piasek
- Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (A.S.); (T.O.); (A.S.G.); (J.J.)
- Correspondence:
| | - Tatjana Orct
- Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (A.S.); (T.O.); (A.S.G.); (J.J.)
| | - Antonija Sulimanec Grgec
- Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (A.S.); (T.O.); (A.S.G.); (J.J.)
| | | | - Sandra Stasenko
- Clinical Department of Obstetrics and Gynecology, Merkur University Hospital, 10000 Zagreb, Croatia;
| | - Jasna Jurasović
- Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (A.S.); (T.O.); (A.S.G.); (J.J.)
| |
Collapse
|
9
|
Reuben A, Frischtak H, Berky A, Ortiz EJ, Morales AM, Hsu‐Kim H, Pendergast LL, Pan WK. Elevated Hair Mercury Levels Are Associated With Neurodevelopmental Deficits in Children Living Near Artisanal and Small-Scale Gold Mining in Peru. GEOHEALTH 2020; 4:e2019GH000222. [PMID: 32490301 PMCID: PMC7240868 DOI: 10.1029/2019gh000222] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 02/10/2020] [Accepted: 03/11/2020] [Indexed: 05/08/2023]
Abstract
Children living near artisanal and small-scale gold mining (ASGM) are at risk of exposure to mercury, a neurotoxicant. It is not certain whether such exposures are harming development, as they occur in underresourced contexts entwined with other stressors, such as malnutrition and enteric infection. This study sought to investigate the association between hair-mercury levels and visual-motor, cognitive, and physical development among children living near ASGM in the Peruvian Amazon. Total hair-mercury levels were measured in 164 children ages 5-12 living in Madre de Dios, Peru. Primary outcomes included Visual-Motor Integration assessed via the Beery-VMI Developmental Test, General Cognitive Ability assessed via the Batería-III Woodcock-Munoz (Spanish-language Woodcock-Johnson Tests of Cognitive Abilities), and Physical Health assessed via anthropometry/hemoglobin counts. Mean (SD) hair-mercury level was 2.06 (2.43) μg/g. Fifty-four children (32.9%) had hair-mercury levels above the World Health Organization reference level of 2.0 μg/g. After controlling for sex, child age, maternal education, and family socioeconomic status, each one unit increase in log hair-mercury level was associated with a 1.01 unit decrease in Visual-Motor Integration (95%CI: -2.06, 0.05, p = 0.061), a 2.59 unit decrease in General Cognitive Ability (95%CI: -4.52, -0.66, p = 0.012), and a 2.43 unit decrease in Physical Health (95%CI: -5.34, 0.49, p = 0.096). After adjustment for covariates, children with hair-mercury levels exceeding the World Health Organization reference level scored 4.68 IQ points lower in Cognitive Ability than their peers. Mercury exposures related to ASGM may be harming child development in the Peruvian Amazon. Children in this region may benefit from intervention to reach their full developmental potential.
Collapse
Affiliation(s)
- Aaron Reuben
- Department of Psychology and NeuroscienceDuke UniversityDurhamNCUSA
| | | | - Axel Berky
- Global Health InstituteDuke UniversityDurhamNCUSA
- Nicholas School of the EnvironmentDuke UniversityDurhamNCUSA
| | - Ernesto J. Ortiz
- Global Health InstituteDuke UniversityDurhamNCUSA
- Nicholas School of the EnvironmentDuke UniversityDurhamNCUSA
| | - Ana Maria Morales
- Centro de Estudios, Investigaciones y Servicios en Salud Publica (CENSAP)Puerto MaldonadoPeru
| | - Heileen Hsu‐Kim
- Nicholas School of the EnvironmentDuke UniversityDurhamNCUSA
| | - Laura L. Pendergast
- Department of Psychological Studies in EducationTemple UniversityPhiladelphiaPAUSA
| | - William K. Pan
- Global Health InstituteDuke UniversityDurhamNCUSA
- Nicholas School of the EnvironmentDuke UniversityDurhamNCUSA
| |
Collapse
|
10
|
Queipo-Abad S, González PR, Martínez-Morillo E, Davis WC, García Alonso JI. Concentration of mercury species in hair, blood and urine of individuals occupationally exposed to gaseous elemental mercury in Asturias (Spain) and its comparison with individuals from a control group formed by close relatives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 672:314-323. [PMID: 30959298 DOI: 10.1016/j.scitotenv.2019.03.367] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 06/09/2023]
Abstract
Between November 19th, 2012 and December 3rd, 2012, 50 workers were intoxicated with gaseous Hg in San Juan de Nieva (Asturias, Spain) during the maintenance of a heat exchanger of a zinc manufacturer. We have quantified the concentration of methylmercury (MeHg), ethylmercury (EtHg) and Hg(II) in blood, hair and urine samples of those individuals taken three years after the accident. Blood, hair and urine of their closest relatives were also analyzed to assess whether the mercury burden present in the intoxicated individuals was due to the occupational exposure or to environmental or lifestyle-related factors. The determination of the mercury species in the samples was carried out applying multiple spiking Isotope Dilution GC-ICP-MS. This procedure corrects for possible interconversion reactions between the Hg species during the sample preparation procedure. Linear correlations were observed for both groups when plotting MeHg in blood vs MeHg in hair, and MeHg in hair vs Hg (II) in urine. The concentrations of Hg species in the intoxicated individuals were not significantly different from those obtained in the control group except for MeHg in blood. Significantly higher levels of MeHg in blood were obtained in some of the intoxicated individuals who had not consumed fish or seafood since the accident. A different correlation between MeHg in hair and MeHg in blood was obtained for these individuals compared to the control group who showed a hair-to-blood ratio consistent with the reported value for people exposed to Hg via fish consumption. Our results suggest that ingested MeHg followed the same pathway of deposition in hair in exposed and non-exposed individuals. However, the exposed individuals with high MeHg levels in blood showed a significantly different extent of MeHg deposition in hair compared to the control group.
Collapse
Affiliation(s)
- Silvia Queipo-Abad
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain
| | - Pablo Rodríguez González
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain.
| | - Eduardo Martínez-Morillo
- Service of Clinical Biochemistry, Laboratory of Medicine, Central University Hospital of Asturias (HUCA), 33011 Oviedo, Spain
| | - W Clay Davis
- Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - José Ignacio García Alonso
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain
| |
Collapse
|
11
|
Preparation 2-(anthracen-9-yl)-1,3-dithiolane as a novel dual-channel AIE-active fluorescent probe for mercury (II) ion with excellent performance. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
12
|
Xu Z, Abeysinghe KS, Xu X, Gu C, Liang L, Lu Q, Zhang Y, Zheng L, Wang WX, Qiu G. New insights into the chemical forms of extremely high methylmercury in songbird feathers from a contaminated site. CHEMOSPHERE 2019; 225:803-809. [PMID: 30904760 DOI: 10.1016/j.chemosphere.2019.03.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/21/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
The chemical forms of mercury (Hg), particularly methylmercury (MeHg), in songbird feathers from an abandoned mining region were analyzed via X-ray absorption near-edge structure analysis (XANES). In feathers, proportions of MeHg as total mercury (75.6-100%) quantified by the XANES were directly comparable to the chemical extraction values (74.1-95.9%). Most of MeHg were bound with cysteine (Cys) and reduced glutathione (GSH), whereas inorganic mercury (IHg) was mainly bound with GSH. These results were consistent with those found in fish muscles and human hairs of both fish consumers and occupational Hg exposure populations. Our study suggested that chemical forms and speciation of Hg were highly dependent on the exposure sources and food consumption, respectively. Bird feathers were able to selectively accumulate MeHg due to their special binding ways. However, detailed mechanisms of Hg accumulation in bird feathers remain to be further elucidated.
Collapse
Affiliation(s)
- Zhidong Xu
- State Key laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kasun S Abeysinghe
- State Key laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaohang Xu
- State Key laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chunhao Gu
- Department of Ecosystems Science and Management, University of Wyoming, 82071, United States
| | - Longchao Liang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Qinhui Lu
- State Key laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yubo Zhang
- Department of Agricultural Sciences, Anshun College, Anshun, 561000, China
| | - Lirong Zheng
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen-Xiong Wang
- Department of Ocean Science, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong
| | - Guangle Qiu
- State Key laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China.
| |
Collapse
|
13
|
Hu L, Liu Z, Hu Y, Zhan H, Zhu J, Ge X. Fabrication of high-intensity electron transfer electrochemiluminescence interface for Hg2+ detection by using reduced graphene oxide-Au nanoparticles nanocomposites and CdS quantum dots. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.06.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
14
|
Wijesekara LA, Usoof R, Gamage SST, Jayasinghe R, Gamage N, De Silva D, Ekanayake S. Mercury levels in hair samples of dentists: A comparative study in Sri Lanka. ACTA ACUST UNITED AC 2017; 9:e12302. [DOI: 10.1111/jicd.12302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/04/2017] [Indexed: 11/27/2022]
Affiliation(s)
| | - Rinzee Usoof
- College of Chemical Sciences; Institute of Chemistry Ceylon; Rajagiriya Sri Lanka
| | - Sachindra S. T. Gamage
- Department of Chemistry; Faculty of Science; University of Peradeniya; Peradeniya Sri Lanka
| | - Ruwan Jayasinghe
- Department of Oral Medicine; Faculty of Dental Sciences; University of Peradeniya; Peradeniya Sri Lanka
| | | | | | - Sagarika Ekanayake
- Department of Biochemistry; Faculty of Medical Sciences; University of Sri Jayewardenepura; Sri Lanka
| |
Collapse
|
15
|
Li Y, Liu N, Liu H, Wang Y, Hao Y, Ma X, Li X, Huo Y, Lu J, Tang S, Wang C, Zhang Y, Gao Z. A novel label-free fluorescence assay for one-step sensitive detection of Hg 2+ in environmental drinking water samples. Sci Rep 2017; 7:45974. [PMID: 28378768 PMCID: PMC5380999 DOI: 10.1038/srep45974] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/07/2017] [Indexed: 01/11/2023] Open
Abstract
A novel label-free fluorescence assay for detection of Hg2+ was developed based on the Hg2+-binding single-stranded DNA (ssDNA) and SYBR Green I (SG I). Differences from other assays, the designed rich-thymine (T) ssDNA probe without fluorescent labelling can be rapidly formed a T-Hg2+-T complex and folded into a stable hairpin structure in the presence of Hg2+ in environmental drinking water samples by facilitating fluorescence increase through intercalating with SG I in one-step. In the assay, the fluorescence signal can be directly obtained without additional incubation within 1 min. The dynamic quantitative working ranges was 5–1000 nM, the determination coefficients were satisfied by optimization of the reaction conditions. The lowest detection limit of Hg2+ was 3 nM which is well below the standard of U.S. Environmental Protection Agency. This method was highly specific for detecting of Hg2+ without being affected by other possible interfering ions from different background compositions of water samples. The recoveries of Hg2+ spiked in these samples were 95.05–103.51%. The proposed method is more viable, low-costing and simple for operation in field detection than the other methods with great potentials, such as emergency disposal, environmental monitoring, surveillance and supporting of ecological risk assessment and management.
Collapse
Affiliation(s)
- Ya Li
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China.,Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| | - Nan Liu
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China.,Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China.,School of Public Health, State Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, 510080, P. R. China.,Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Hui Liu
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China
| | - Yu Wang
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China
| | - Yuwei Hao
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China
| | - Xinhua Ma
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| | - Xiaoli Li
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| | - Yapeng Huo
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| | - Jiahai Lu
- School of Public Health, State Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, 510080, P. R. China
| | - Shuge Tang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China.,Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Caiqin Wang
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China.,Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| | - Yinhong Zhang
- School of Public Health, Lanzhou University, Lanzhou 73000, P. R. China
| | - Zhixian Gao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China
| |
Collapse
|
16
|
Li J, Lu L, Kang T, Cheng S. Intense charge transfer surface based on graphene and thymine–Hg(II)–thymine base pairs for detection of Hg 2+. Biosens Bioelectron 2016; 77:740-5. [DOI: 10.1016/j.bios.2015.10.047] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/10/2015] [Accepted: 10/14/2015] [Indexed: 12/23/2022]
|
17
|
Manceau A, Lemouchi C, Rovezzi M, Lanson M, Glatzel P, Nagy KL, Gautier-Luneau I, Joly Y, Enescu M. Structure, Bonding, and Stability of Mercury Complexes with Thiolate and Thioether Ligands from High-Resolution XANES Spectroscopy and First-Principles Calculations. Inorg Chem 2015; 54:11776-91. [DOI: 10.1021/acs.inorgchem.5b01932] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Mauro Rovezzi
- European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | | | - Pieter Glatzel
- European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | - Kathryn L. Nagy
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, MC-186, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | | | | | - Mironel Enescu
- Laboratoire
Chrono Environnement, Université de Franche-Comté, CNRS, 25030 Besançon, France
| |
Collapse
|
18
|
Manceau A, Lemouchi C, Enescu M, Gaillot AC, Lanson M, Magnin V, Glatzel P, Poulin BA, Ryan JN, Aiken GR, Gautier-Luneau I, Nagy KL. Formation of Mercury Sulfide from Hg(II)-Thiolate Complexes in Natural Organic Matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:9787-9796. [PMID: 26168020 DOI: 10.1021/acs.est.5b02522] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Methylmercury is the environmental form of neurotoxic mercury that is biomagnified in the food chain. Methylation rates are reduced when the metal is sequestered in crystalline mercury sulfides or bound to thiol groups in macromolecular natural organic matter. Mercury sulfide minerals are known to nucleate in anoxic zones, by reaction of the thiol-bound mercury with biogenic sulfide, but not in oxic environments. We present experimental evidence that mercury sulfide forms from thiol-bound mercury alone in aqueous dark systems in contact with air. The maximum amount of nanoparticulate mercury sulfide relative to thiol-bound mercury obtained by reacting dissolved mercury and soil organic matter matches that detected in the organic horizon of a contaminated soil situated downstream from Oak Ridge, TN, in the United States. The nearly identical ratios of the two forms of mercury in field and experimental systems suggest a common reaction mechanism for nucleating the mineral. We identified a chemical reaction mechanism that is thermodynamically favorable in which thiol-bound mercury polymerizes to mercury-sulfur clusters. The clusters form by elimination of sulfur from the thiol complexes via breaking of mercury-sulfur bonds as in an alkylation reaction. Addition of sulfide is not required. This nucleation mechanism provides one explanation for how mercury may be immobilized, and eventually sequestered, in oxygenated surface environments.
Collapse
Affiliation(s)
- Alain Manceau
- †ISTerre, Université Grenoble Alpes, CNRS, 38000 Grenoble, France
| | - Cyprien Lemouchi
- †ISTerre, Université Grenoble Alpes, CNRS, 38000 Grenoble, France
- ‡Institut Néel, Université Grenoble Alpes, CNRS, 38000 Grenoble, France
| | - Mironel Enescu
- §Laboratoire Chrono Environnement, Université de Franche-Comté, CNRS, 25030 Besançon, France
| | - Anne-Claire Gaillot
- ∥Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 Rue de la Houssinière, 44322 Nantes, France
| | - Martine Lanson
- †ISTerre, Université Grenoble Alpes, CNRS, 38000 Grenoble, France
| | - Valérie Magnin
- †ISTerre, Université Grenoble Alpes, CNRS, 38000 Grenoble, France
| | - Pieter Glatzel
- ⊥European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | - Brett A Poulin
- #Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, 428 UCB, Boulder, Colorado 80309-0428, United States
- ∇U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303, United States
| | - Joseph N Ryan
- #Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, 428 UCB, Boulder, Colorado 80309-0428, United States
| | - George R Aiken
- ∇U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303, United States
| | | | - Kathryn L Nagy
- @Department of Earth and Environmental Sciences, University of Illinois at Chicago, MC-186, 845 West Taylor Street, Chicago, Illinois 60607, United States
| |
Collapse
|
19
|
Choudhury S, Thomas JK, Sylvain NJ, Ponomarenko O, Gordon RA, Heald SM, Janz DM, Krone PH, Coulthard I, George GN, Pickering IJ. Selenium preferentially accumulates in the eye lens following embryonic exposure: a confocal X-ray fluorescence imaging study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:2255-2261. [PMID: 25607235 DOI: 10.1021/es503848s] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Maternal transfer of elevated selenium (Se) to offspring is an important route of Se exposure for fish in the natural environment. However, there is a lack of information on the tissue specific spatial distribution and speciation of Se in the early developmental stages of fish, which provide important information about Se toxicokinetics. The effect of maternal transfer of Se was studied by feeding adult zebrafish a Se-elevated or a control diet followed by collection of larvae from both groups. Novel confocal synchrotron-based techniques were used to investigate Se within intact preserved larvae. Confocal X-ray fluorescence imaging was used to compare Se distributions within specific planes of an intact larva from each of the two groups. The elevated Se treatment showed substantially higher Se levels than the control; Se preferentially accumulated to highest levels in the eye lens, with lower levels in the retina, yolk and other tissues. Confocal X-ray absorption spectroscopy was used to determine that the speciation of Se within the eye lens of the intact larva was a selenomethionine-like species. Preferential accumulation of Se in the eye lens may suggest a direct cause-and-effect relationship between exposure to elevated Se and Se-induced ocular impairments reported previously. This study illustrates the effectiveness of confocal X-ray fluorescence methods for investigating trace element distribution and speciation in intact biological specimens.
Collapse
Affiliation(s)
- Sanjukta Choudhury
- Department of Geological Sciences, University of Saskatchewan , 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Xing X, Du R, Li Y, Li B, Cai Q, Mo G, Gong Y, Chen Z, Wu Z. Structural change of human hair induced by mercury exposure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:11214-11220. [PMID: 23981029 DOI: 10.1021/es402335k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Mercury is one of the most hazardous pollutants in the environment. In this paper, the structural change of human hair induced by mercury exposure was studied. Human hair samples were, respectively, collected from the normal Beijing area and the Hg-contaminated Wanshan area of the Guizhou Province, China. Inductively coupled plasma mass spectroscopy was used to detect the element contents. A small angle X-ray scattering technique was used to probe the structural change. Three reflections with 8.8, 6.7, and 4.5 nm spacing were compared between the normal and the Hg-contaminated hair samples. The results confirm that the 4.5 nm reflection is from the ordered fibrillar structure of glycosaminoglycan (GAG) in proteoglycan (PG) that composes the matrix around the intermediate filaments. The increase of Ca content makes the regular oriented fibrillar structure of GAG transform to a random oriented one, broadening the angular extent of the reflection with 4.5 nm spacing. However, overdose Hg makes the core proteins where the ordered fibrils of GAG are attached become coiled, which destroys the ordered arrangements of fibrillar GAG in PG, resulting in the disappearance of the reflections with 4.5 nm spacing. The disappearance of the 4.5 nm reflection can be used as a bioindicator of overdose Hg contamination to the human body. A supercoiled-coil model of hair nanoscale structure and a possible mechanism of mercury effect in human hair are proposed in this paper.
Collapse
Affiliation(s)
- Xueqing Xing
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing, Beijing Municipality 100049, China
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Morris JS, Crane SB. Selenium toxicity from a misformulated dietary supplement, adverse health effects, and the temporal response in the nail biologic monitor. Nutrients 2013; 5:1024-57. [PMID: 23538937 PMCID: PMC3705333 DOI: 10.3390/nu5041024] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/12/2013] [Accepted: 03/13/2013] [Indexed: 01/08/2023] Open
Abstract
Use of dietary supplements in the U.S. has increased steadily over the last 25 years. While misformulation is uncommon, the consequences can be serious. A March 2008 voluntary market recall removed supplement products responsible for the most serious selenium toxicity outbreak that has occurred in the U.S. We quantified selenium concentrations in the misformulated supplement products, measured the temporal response in the nail biologic monitor, and associated exposure to self-reported selenosis symptoms. Subjects recruited through state health departments and referrals provided samples of the misformulated supplement products, exposure information, monthly toenail and or fingernail clippings or onycholysitic nail fragments, and listed their newly onset adverse health effects attributed to selenium toxicity. Ninety-seven subjects enrolled and submitted at least one test sample. Peak selenium concentrations (up to 18.3 and 44.1 μg/g for toenails and fingernails, respectively) were measured. Multiple samples (52 total) of all six recalled supplement lots were analyzed ranging from 22,300 to 32,200 μg selenium per daily dose. Average consumption was 30.9 ± 13.9 doses; 73 subjects provided follow-up data on selenosis symptoms at 2.50 ± 0.14 years. Nail samples accurately reflect exposure in this selenium toxicity outbreak, which resulted in long-term/permanent adverse health effects.
Collapse
Affiliation(s)
- John Steven Morris
- Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; E-Mail:
- Division of Research Services, Truman Memorial Veterans Hospital, Columbia, MO 65211, USA
| | - Stacy B. Crane
- Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; E-Mail:
| |
Collapse
|
22
|
Lynch M, Kirkwood R, Gray R, Robson D, Burton G, Jones L, Sinclair R, Arnould JPY. Characterization and causal investigations of an alopecia syndrome in Australian fur seals (Arctocephalus pusillus doriferus). J Mammal 2012. [DOI: 10.1644/11-mamm-a-279.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
23
|
Limitations of the scalp-hair biologic monitor in assessing selenium status in epidemiological investigations. J Radioanal Nucl Chem 2011. [DOI: 10.1007/s10967-011-1253-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
24
|
Yoshida S, Haratake M, Fuchigami T, Nakayama M. Selenium in Seafood Materials. ACTA ACUST UNITED AC 2011. [DOI: 10.1248/jhs.57.215] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Sakura Yoshida
- Graduate School of Biomedical Sciences, Nagasaki University
| | | | | | - Morio Nakayama
- Graduate School of Biomedical Sciences, Nagasaki University
| |
Collapse
|
25
|
Mah V, Jalilehvand F. Glutathione complex formation with mercury(II) in aqueous solution at physiological pH. Chem Res Toxicol 2010; 23:1815-23. [PMID: 21073204 DOI: 10.1021/tx100260e] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mercury(II) complexes formed in neutral aqueous solution with glutathione (GSH, here denoted AH(3) in its triprotonated form) were studied using Hg L(III)-edge extended X-ray absorption fine structure (EXAFS) and (199)Hg NMR spectroscopy, complemented with electrospray ionization mass spectrometric (ESI-MS) analyses. The [Hg(AH)(2)](2-) complex, with the Hg-S bond distances at 2.325 ± 0.01 Å in linear S-Hg-S coordination, and the (199)Hg NMR chemical shift at -984 ppm, dominates except at high excess of glutathione. In a series of solutions with C(Hg(II)) ∼17 mM and GSH/Hg(II) mole ratios rising from 2.4 to 11.8, the gradually increasing mean Hg-S bond distance corresponds to an increasing amount of the [Hg(AH)(3)](4-) complex. ESI-MS peaks appear at -m/z values of 1208 and 1230 corresponding to the [Na(4)Hg(AH)(2)(A)](-) and [Na(5)Hg(AH)(A)(2)](-) species, respectively. In another series of solutions at pH 7.0 with C(Hg(II)) ∼50 mM and GSH/Hg(II) ratios from 2.0 to 10.0, the Hg L(III)-edge EXAFS and (199)Hg NMR spectra show that at high excess of glutathione (∼0.35 M) about ∼70% of the total mercury(II) concentration is present as the [Hg(AH)(3)](4-) complex, with the average Hg-S bond distance 2.42 ± 0.02 Å in trigonal HgS(3) coordination. The proportions of HgS(n) species, n = 2, 3, and 4, quantified by fitting linear combinations of model EXAFS oscillations to the experimental EXAFS data in our present and previous studies were used to obtain stability constants for the [Hg(AH)(3)](4-) complex and also for the [Hg(A)(4)](10-) complex that is present at high pH. For Hg(II) in low concentration at physiological conditions (pH 7.4, C(GSH) = 2.2 mM), the relative amounts of the HgS(2) species [Hg(AH)(2)](2-), [Hg(AH)(A)](3-), and the HgS(3) complex [Hg(AH)(3)](4-) were calculated to be 95:2:3. Our results are not consistent with the formation of dimeric Hg(II)-GSH complexes proposed in a recent EXAFS study.
Collapse
Affiliation(s)
- Vicky Mah
- Department of Chemistry, University of Calgary, Calgary, AB, Canada
| | | |
Collapse
|