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Zhang B, Tian P, Zhu H, Xie L, Dai P, He B. Ultrasensitive detection of PCB77 based on Exonuclease III-powered DNA walking machine. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125831. [PMID: 33878649 DOI: 10.1016/j.jhazmat.2021.125831] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 03/01/2021] [Accepted: 04/03/2021] [Indexed: 06/12/2023]
Abstract
In view of the urgent need to determine polychlorinated biphenyls (PCBs) in the environment, we report a simple and sensitive electrochemical aptasensor to detect 3,3',4,4'-tetrachlorobiphenyl (PCB77) based on Exonuclease III-powered Deoxyribonucleic Acid (DNA) walking machine using poly (diallyldimethylammonium chloride) (PDDA), which was functionalized hollow porous graphitic carbon nitride/ Ni-Co hollow nanoboxes/ Au-Pd-Pt nanoflowers composite material. Upon the addition of PCB77, the specific binding between PCB77 and the aptamer (Apt) could trigger the Exo III-assisted cyclic amplification process and release unlocking probes to deblock the Swing arm/Blocker duplex. Finally, the hybridized hairpin 3 (HP3), a short oligonucleotide, was left on the electrode via Exo III digestion of hybridized HP2, and thus a strong methylene blue (MB) signal was obtained. As expected, the proposed aptasensor exhibits exceptional PCB77 detection performances with a very low detection limit of 5.13 pg/L and a wide linear range of 0.01-100 ng/L based on the calibration curve. Moreover, the aptasensor presents a high level of selectivity and stability, with an acceptable degree of reproducibility. The results of this study have indicated that the proposed aptasensor has great potential application prospects, as demonstrated by its successful use in real environmental water samples.
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Affiliation(s)
- Baozhong Zhang
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China.
| | - Panpan Tian
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China; School of Chemistry and Chemical Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Huina Zhu
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Lingling Xie
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Pengbo Dai
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Baoshan He
- School of Food Science and Technology, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China.
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Champoux L, Rail JF, Lavoie RA. Polychlorinated dibenzo-p-dioxins, dibenzofurans, and flame retardants in northern gannet (Morus bassanus) eggs from Bonaventure Island, Gulf of St. Lawrence, 1994-2014. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 222:600-608. [PMID: 28069368 DOI: 10.1016/j.envpol.2016.09.055] [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: 03/03/2016] [Revised: 09/13/2016] [Accepted: 09/16/2016] [Indexed: 06/06/2023]
Abstract
Northern gannet (Morus bassanus) eggs from Bonaventure Island, Québec, Canada, were collected to monitor concentrations of contaminants. Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs) and non-ortho polychlorinated biphenyls (PCBs) were measured in eggs from 2004 and 2009, and several brominated and nonbrominated flame retardants (FRs) were measured every 2-5 years in eggs from 1994 to 2014. The sum (Σ) concentrations of PCDDs/Fs were significantly lower in 2009 relative to 2004, but the total toxic equivalent concentrations for PCDDs, PCDFs, and PCBs showed no significant differences (196 ng/kg wet weight (ww) in 2004 and 220 ng/kg ww in 2009). The mean ΣFR concentrations decreased significantly between 1994 and 2014, from 58 ng/g ww to 19 ng/g ww. Hexabromocyclododecane (HBCDD) was the principal nonbrominated FR detected in gannet eggs and ranged from <1.0 ng/g ww to 6.9 ng/g ww. The PCDD/F and nonortho PCB profiles were dominated by 2,3,7,8- tetrachloro-dibenzofuran (2,3,7,8-TCDF; from 26.2 ng/g ww to 34.8 ng/kg ww) and PCB-77 (from 1580 ng/g ww to 2650 ng/kg ww), respectively. Although the values of both ecological tracer stable isotopes of carbon (δ13C) and nitrogen (δ15N) showed differences among the years, no temporal trends were observed, which indicates relatively stable adults' diet and foraging area over this time period. The trends over time in concentrations of the studied contaminants likely reflect a decrease in environmental contamination. The mean 2012 eggshell thickness was 10% lower than the pre-DDT value and corresponded to a year of poor reproductive success.
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Affiliation(s)
- Louise Champoux
- Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, Quebec, Quebec, G1J 0C3, Canada.
| | - Jean-François Rail
- Canadian Wildlife Service, Environment and Climate Change Canada, Quebec, Quebec, G1J 0C3, Canada.
| | - Raphael A Lavoie
- Biology Department, Queen's University, Kingston, Ontario, K7L 3N6, Canada.
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Foster WG, Evans JA, Little J, Arbour L, Moore A, Sauve R, Andrés León J, Luo W. Human exposure to environmental contaminants and congenital anomalies: a critical review. Crit Rev Toxicol 2016; 47:59-84. [PMID: 27685638 DOI: 10.1080/10408444.2016.1211090] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Congenital anomalies are an important cause of infant mortality and disability. Developmental exposure to environmental contaminants is thought to increase the risk for congenital anomalies. Herein, we describe a critical review of the literature conducted between February and March 2014 yielding 3057 references from which 97 unique relevant articles published from 2003 through 2014 were evaluated. Common congenital anomalies including hypospadias, cryptorchidism, anogenital distance (AGD), congenital heart defects and oral clefts were well represented in the literature whereas other outcomes such as neural tube defects, limb deficiency defects and gastroschisis were rarely described. While definitions used for congenital anomalies and methods of ascertainment were usually consistent across studies, inconsistencies were frequently found in grouping of different congenital heart defects. Despite strong links between some congenital anomalies and parental occupation, these studies are unable to provide clear insight into the specific chemicals responsible owing to lack of direct measures of exposure. In comparison, data are mixed for contaminant exposures at concentrations representative of results from contemporary biomonitoring studies. Of the environmental contaminants studied, the association between phthalate exposures and developmental abnormalities of the male reproductive tract received the greatest attention. Important limitations of the literature studied relate to adequacy of sample size, absence of or weaknesses in exposure assessment methodologies, failure to account for biological plausibility and grouping of congenital anomalies with divergent mechanisms. We conclude that the literature is inadequate at this time to support a conclusion that exposure to environmental contaminants are or are not associated with increased risks for congenital anomalies in the general population.
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Affiliation(s)
- Warren G Foster
- a Department of Obstetrics & Gynecology , McMaster University , Hamilton , Ontario , Canada
| | - Jane A Evans
- b Department of Biochemistry and Medical Genetics , University of Manitoba , Winnipeg , Manitoba , Canada
| | - Julian Little
- c School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine , University of Ottawa , Ottawa , Ontario , Canada
| | - Laura Arbour
- d Department of Medical Genetics , University of British Columbia , Vancouver , British Columbia , Canada
| | - Aideen Moore
- e Department of Paediatrics , University of Toronto and the Hospital for Sick Children , Toronto , Ontario , Canada
| | - Reg Sauve
- f Department of Community Health Sciences , University of Calgary , Calgary , Alberta , Canada
| | - Juan Andrés León
- g Maternal, Child and Youth Health Surveillance and Epidemiology Division , Centre for Chronic Disease Prevention, Public Health Agency of Canada , Ottawa , Ontario , Canada
| | - Wei Luo
- g Maternal, Child and Youth Health Surveillance and Epidemiology Division , Centre for Chronic Disease Prevention, Public Health Agency of Canada , Ottawa , Ontario , Canada
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Wu L, Qi P, Fu X, Liu H, Li J, Wang Q, Fan H. A novel electrochemical PCB77-binding DNA aptamer biosensor for selective detection of PCB77. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.04.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Muusse M, Christensen G, Gomes T, Kočan A, Langford K, Tollefsen KE, Vaňková L, Thomas KV. Characterization of AhR agonists reveals antagonistic activity in European herring gull (Larus argentatus) eggs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 514:211-218. [PMID: 25666281 DOI: 10.1016/j.scitotenv.2015.01.101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 01/28/2015] [Accepted: 01/28/2015] [Indexed: 06/04/2023]
Abstract
European herring gull (Larus argentatus) eggs from two Norwegian islands, Musvær in the south east and Reiaren in Northern Norway, were screened for dioxins, furans, and dioxin-like and selected non-dioxin-like polychlorinated biphenyls (PCBs), and subjected to non-target analysis to try to identify the aryl hydrocarbon receptor (AhR) agonists, responsible for elevated levels measured using the dioxin responsive chemically activated luciferase expression (DR-CALUX) assay. Eggs from Musvær contained chemically calculated toxic equivalent (WHO TEQ) levels of between 109 and 483 pg TEQ/g lw, and between 82 and 337 pg TEQ/g lw was determined in eggs from Reiaren. In particular PCB126 contributed highly to the total TEQ (69-82%). In 19 of the 23 samples the calculated WHO TEQ was higher than the TEQCALUX. Using CALUX specific relative effect potencies (REPs), the levels were lower at between 77 and 292 pg/g lw in eggs from Musvær and between 55 and 223 pg/g lw in eggs from Reiaren, which was higher than the TEQCALUX in 16 of the 23 samples. However, the means of the REP values and the TEQCALUX were not significantly different. This suggests the presence of compounds that can elicit antagonist effects, with a low binding affinity to the AhR. Non-target analysis identified the presence of hexachlorobenzene (HCB) (quantified at 9.6-185 pg/g lw) but neither this compound nor high concentrations of PCB126 and non-dioxin-like PCBs could explain the differences between the calculated TEQ or REP values and the TEQCALUX. Even though, for most AhR agonists, the sensitivity of herring gulls is not known, the reported levels can be considered to represent a risk for biological effects in the developing embryo, compared to LC50 values in chicken embryos. For human consumers of herring gull eggs, these eggs contain TEQ levels up to four times higher than the maximum tolerable weekly intake.
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Affiliation(s)
- Martine Muusse
- Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, N-0349 Oslo, Norway; University of Oslo, Dept. of Bioscience, Postboks N-0316 Blindern, Oslo, Norway.
| | | | - Tânia Gomes
- Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, N-0349 Oslo, Norway
| | - Anton Kočan
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Katherine Langford
- Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, N-0349 Oslo, Norway
| | - Knut Erik Tollefsen
- Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, N-0349 Oslo, Norway
| | - Lenka Vaňková
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Kevin V Thomas
- Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, N-0349 Oslo, Norway
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