1
|
James BD, Medvedev AV, Makarov SS, Nelson RK, Reddy CM, Hahn ME. Moldable Plastics (Polycaprolactone) can be Acutely Toxic to Developing Zebrafish and Activate Nuclear Receptors in Mammalian Cells. ACS Biomater Sci Eng 2024. [PMID: 38981095 DOI: 10.1021/acsbiomaterials.4c00693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Popularized on social media, hand-moldable plastics are formed by consumers into tools, trinkets, and dental prosthetics. Despite the anticipated dermal and oral contact, manufacturers share little information with consumers about these materials, which are typically sold as microplastic-sized resin pellets. Inherent to their function, moldable plastics pose a risk of dermal and oral exposure to unknown leachable substances. We analyzed 12 moldable plastics advertised for modeling and dental applications and determined them to be polycaprolactone (PCL) or thermoplastic polyurethane (TPU). The bioactivities of the most popular brands advertised for modeling applications of each type of polymer were evaluated using a zebrafish embryo bioassay. While water-borne exposure to the TPU pellets did not affect the targeted developmental end points at any concentration tested, the PCL pellets were acutely toxic above 1 pellet/mL. The aqueous leachates of the PCL pellets demonstrated similar toxicity. Methanolic extracts from the PCL pellets were assayed for their bioactivity using the Attagene FACTORIAL platform. Of the 69 measured end points, the extracts activated nuclear receptors and transcription factors for xenobiotic metabolism (pregnane X receptor, PXR), lipid metabolism (peroxisome proliferator-activated receptor γ, PPARγ), and oxidative stress (nuclear factor erythroid 2-related factor 2, NRF2). By nontargeted high-resolution comprehensive two-dimensional gas chromatography (GC × GC-HRT), we tentatively identified several compounds in the methanolic extracts, including PCL oligomers, a phenolic antioxidant, and residues of suspected antihydrolysis and cross-linking additives. In a follow-up zebrafish embryo bioassay, because of its stated high purity, biomedical grade PCL was tested to mitigate any confounding effects due to chemical additives in the PCL pellets; it elicited comparable acute toxicity. From these orthogonal and complementary experiments, we suggest that the toxicity was due to oligomers and nanoplastics released from the PCL rather than chemical additives. These results challenge the perceived and assumed inertness of plastics and highlight their multiple sources of toxicity.
Collapse
Affiliation(s)
- Bryan D James
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
| | - Alexander V Medvedev
- Attagene, Research Triangle Park, Morrisville, North Carolina 27709, United States
| | - Sergei S Makarov
- Attagene, Research Triangle Park, Morrisville, North Carolina 27709, United States
| | - Robert K Nelson
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
| | - Christopher M Reddy
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
| | - Mark E Hahn
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
| |
Collapse
|
2
|
Wang Z, Zhang X, Yang Q, Zhang S, Chang G, Zang X, Wang C, Wang Z. Covalent triazine-based frameworks for efficient solid-phase microextraction of phthalic acid esters from food-contacted plastics. J Chromatogr A 2022; 1681:463474. [PMID: 36088777 DOI: 10.1016/j.chroma.2022.463474] [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: 05/02/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 11/28/2022]
Abstract
Owing to various health threats associated with phthalic acid esters (PAEs), this category of endocrine-disrupting compounds has attracted more and more public scrutiny. However, the efficient preconcentration of PAEs from complex food-contacted plastics still remains challenging. Herein, three covalent triazine-based frameworks (CTFs) were constructed by facile Friedel-Crafts reactions of cyanuric chloride (CC), with triptycene (TPC), fluorene (FL) and 1,3,5-triphenylbenzene (TPB), respectively. Three CTFs were then employed as solid-phase microextraction (SPME) coatings for the extraction of PAEs. Benefiting from the large surface area and high pore volume, the newly-synthesized CC-TPC based SPME method exhibited large enrichment factors (978-2210), low limits of detection (0.027-0.10 ng g - 1), satisfactory linear ranges (0.09-20 ng g - 1), acceptable repeatabilities (4.3-9.6%) and high relative recoveries (92.0-104.6%).
Collapse
Affiliation(s)
- Zhuo Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China
| | - Xinyue Zhang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China
| | - Qian Yang
- College of Public Health, Hebei University, Baoding 071002 Hebei, PR. China
| | - Shuaihua Zhang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China.
| | - Guifen Chang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China
| | - Xiaohuan Zang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China
| | - Chun Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China
| | - Zhi Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001 Hebei, PR. China.
| |
Collapse
|
3
|
Berenstein G, Hughes EA, Zalts A, Basack S, Bonesi SM, Montserrat JM. Environmental fate of dibutylphthalate in agricultural plastics: Photodegradation, migration and ecotoxicological impact on soil. CHEMOSPHERE 2022; 290:133221. [PMID: 34906532 DOI: 10.1016/j.chemosphere.2021.133221] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Phthalic acid esters (PAEs) were determined in polyethylene covers used in horticultural production units located at Moreno and La Plata districts (Buenos Aires, Argentina), detecting 0.69-8.75 mg PAEs kg-1 plastic in greenhouse and tunnel films. The PAEs found were diisobutylphthalate (DIBP), dibutylphthalate (DBP) and diethylhexylphthalate (DEHP). DBP was chosen as a model molecule to carry out the photochemical degradation studies that led to the formation of monobutylphthalate (MBP) and phthalic acid (PA). DBP, MBP and PA migration from plastic covers was studied, finding that while DBP and MBP moved to soil and atmosphere in short times (<48 h), PA remained in the agricultural covers. Further experiments with DBP were made to explore the effect on migration of temperature (20 °C, 50 °C), film thickness (25 μm, 100 μm) and plastic ageing by solarization, observing that temperature increase, film thickness reduction and ageing by solarization favored DBP migration to the environment. DBP and MBP impact on soil were evaluated by avoidance and reproduction tests using Eisenia andrei as bioindicator. Both compounds reduced cocoon viability decreasing the number of juveniles at the lowest concentration assayed (0.1 mg kg-1 of soil). At higher DBP and MBP concentrations the reproductive parameters (number of total cocoons, hatchability and number of juveniles) also showed alterations compared with the controls. Carboxylesterases (CaE), cholinesterases (ChE) and glutathion-S-transferases (GST) activities were analyzed in E. andrei exposed to DBP; cholinesterases activities were reduced at 1 and 10 mg DBP kg-1 soil, and glutathione S-transferases activities were increased at 10 mg DBP kg-1 soil while no effect was observed on carboxylesterases activities. These results emphasize the need to continue studying the impact of PAEs and their photodegradation products on the environment.
Collapse
Affiliation(s)
- Giselle Berenstein
- Instituto de Ciencias, Universidad Nacional de General Sarmiento (UNGS), J. M. Gutiérrez 1150, (B1613GSX) Los Polvorines; Prov. de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Enrique A Hughes
- Instituto de Ciencias, Universidad Nacional de General Sarmiento (UNGS), J. M. Gutiérrez 1150, (B1613GSX) Los Polvorines; Prov. de Buenos Aires, Argentina
| | - Anita Zalts
- Instituto de Ciencias, Universidad Nacional de General Sarmiento (UNGS), J. M. Gutiérrez 1150, (B1613GSX) Los Polvorines; Prov. de Buenos Aires, Argentina
| | - Silvana Basack
- Instituto de Ciencias, Universidad Nacional de General Sarmiento (UNGS), J. M. Gutiérrez 1150, (B1613GSX) Los Polvorines; Prov. de Buenos Aires, Argentina
| | - Sergio M Bonesi
- Departamento de Química Orgánica, Facultad de Cs. Exactas y Naturales, Ciudad Universitaria, Pabellón II, CABA, CP 1428, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Javier M Montserrat
- Instituto de Ciencias, Universidad Nacional de General Sarmiento (UNGS), J. M. Gutiérrez 1150, (B1613GSX) Los Polvorines; Prov. de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| |
Collapse
|
4
|
The confrontation of consumer beliefs about the impact of microwave-processing on food and human health with existing research. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.11.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
5
|
Dolai J, Ali H, Jana NR. Selective capturing and fluorescence “turn on” detection of dibutyl phthalate using a molecular imprinted nanocomposite. NEW J CHEM 2021. [DOI: 10.1039/d1nj04169j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fluorescence-based selective detection of dibutyl phthalate is achieved via a paper-strip-based approach.
Collapse
Affiliation(s)
- Jayanta Dolai
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata-700032, India
| | - Haydar Ali
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata-700032, India
| | - Nikhil R. Jana
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata-700032, India
| |
Collapse
|
6
|
Feng YX, Chen X, Li YW, Zhao HM, Xiang L, Li H, Cai QY, Feng NX, Mo CH, Wong MH. A Visual Leaf Zymography Technique for the In Situ Examination of Plant Enzyme Activity under the Stress of Environmental Pollution. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14015-14024. [PMID: 32822176 DOI: 10.1021/acs.jafc.0c03815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This study established a high-efficiency fluorescence quenching approach for the in situ visualization and modeling of the spatial distribution of xylanase, β-glucosidase, and phosphatase activities in plant leaves under pollution stress (namely, the leaf zymography technique, LZT). In the LZT, a membrane saturated with an enzyme-specific fluorescent substrate on the leaf surface was incubated and the fluorescence image generated on the membrane under ultraviolet light was recorded. An image-based modeling method for restoring the morphological traits of the true image by reducing noise was developed to ensure the accurate estimation of enzyme activities. The LZT could simultaneously measure 48 samples within 2 h, with good reproducibility. The results obtained by the LZT were comparable to those obtained by a conventional biochemical analysis method and presented low-cost and convenient advantages. This paper explains the theoretical basis required to investigate the realistic application of the LZT for assessing ecotoxicity in large-scale monitoring.
Collapse
Affiliation(s)
- Yu-Xi Feng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xin Chen
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan-Wen Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hai-Ming Zhao
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Lei Xiang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hui Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Quan-Ying Cai
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Nai-Xian Feng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ming-Hung Wong
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
- Consortium on Health, Environment, Education and Research (CHEER), The Education University of Hong Kong, Tai Po, Hong Kong, China
| |
Collapse
|
7
|
Myat Thu A, Song M, Wu S, Sheng A, Chen X, Wang X. Artificial Neural Network Prediction and Mechanism Analysis for Migration of Environmental Contaminant Cyclic Organosiloxane Oligomer from Silicone Rubber. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aung Myat Thu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, P.R. China
| | - Meng Song
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, P.R. China
| | - Sizhu Wu
- State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Anbang Sheng
- Qingdao Metro Group Co., Ltd, Qingdao 266000, P.R. China
| | - Xinghao Chen
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, P.R. China
| | - Xiujuan Wang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, P.R. China
| |
Collapse
|
8
|
Cationic gemini surfactant-resorcinol-aldehyde resin and its application in the extraction of endocrine disrupting compounds from food contacting materials. Food Chem 2018; 277:407-413. [PMID: 30502164 DOI: 10.1016/j.foodchem.2018.10.132] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 10/22/2018] [Accepted: 10/28/2018] [Indexed: 12/26/2022]
Abstract
A new cationic gemini surfactant-resorcinol/formaldehyde resin was designed and synthesized. Cationic gemini surfactant was introduced into the resorcinol/formaldehyde resin for the first time and led to the retention of negatively charged endocrine disrupting compounds (EDCs) through electrostatic interactions, hydrogen bonding and π-π interactions. The synthesized material showed good performance in the dispersive micro-solid phase extraction (D-μ-SPE) of EDCs such as alkylphenol and phenoxy acid herbicides from food packaging migrants. Extraction parameters such as pH, adsorbent dose, extraction time and salting out effect were optimized. The limits of detections were in the range of 0.5-0.8 ng/mL, and the recoveries were in the range of 90-100%. The developed method was applied to the analysis of EDCs from food contacting materials migrants with pentachlorophenol, 2,4-dichlorophenoxyacetic acid and bisphenol A detected in the concentration range of 0.2-1.2 mg/kg. It also showed great potential in the D-μ-SPE of other compounds with negative charge or high hydrophobicity.
Collapse
|
9
|
Przybyla J, Geldhof GJ, Smit E, Kile ML. A cross sectional study of urinary phthalates, phenols and perchlorate on thyroid hormones in US adults using structural equation models (NHANES 2007-2008). ENVIRONMENTAL RESEARCH 2018; 163:26-35. [PMID: 29426025 PMCID: PMC6451439 DOI: 10.1016/j.envres.2018.01.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 01/20/2018] [Accepted: 01/24/2018] [Indexed: 05/02/2023]
Abstract
BACKGROUND Biomonitoring data shows that people are exposed to phthalates, phenols and perchlorates. Many of these compounds are endocrine disrupting compounds that affect thyroid hormone levels. Yet the effect of these compounds on thyroid hormone levels are often evaluated individually rather than as a mixture. Our objective was to examine the association between 11 urinary endocrine disrupting compounds and thyroid hormones using structural equation models. METHODS Using data from the National Health and Nutrition and Examination Survey 2007-2008, we fit a latent variable utilizing urinary measurements of 9 compounds in females (perchlorate, bisphenol A, benzophenone-3, mono-2ethyl5carboxypentyl phthalate, mono-n-butyl phthalate, mono-(3-carboxypropyl) phthalate, mono(2ethyl5hydroxyhexyl) phthalate, mono-benzyl phthalate, and mono-isobutyl phthalate) and 8 compounds in males (without benzophenone-3). The association of the latent variable with serum thyroid hormones (Total T3, Total T4, and Thyroid Stimulating Hormones) was assessed in females (N = 710) and males (N = 850) over the age of 12 controlling for age, race, and urinary creatinine. RESULTS In males, urinary endocrine disrupting compound levels were negatively associated with thyroxine (β: -0.19, 95% Confidence Interval (95% CI): -0.31, -0.05). In females, urinary endocrine disrupting compound levels were positively associated with triiodothyronine serum concentrations (β: 0.09, 95% CI: -0.03, 0.21) however this association was not statistically significant. CONCLUSIONS This cross-sectional analysis provides additional evidence that environmental exposure to phthalates and phenols is associated with endocrine-related processes. Furthermore, these results suggested sex-specific differences in exposure to endocrine disrupting mixtures, and the exposure-response between endocrine disrupting mixtures and thyroid hormone levels. Specifically, higher exposure to a mixture of endocrine disrupting compounds was associated with lower levels of total T4 in males but not in females. While a structural methodological framework was used to assess these complex relationships, the cross sectional nature of this analysis limits causal inference and further research is needed to determine the clinical significance of these findings.
Collapse
Affiliation(s)
- Jennifer Przybyla
- School of Biological and Population Health, College of Public Health and Human Sciences, Corvallis, OR, USA.
| | - G John Geldhof
- School of Social and Behavioral Health Sciences, Human Development and Family Sciences, College of Public Health and Human Sciences, Corvallis, OR, USA
| | - Ellen Smit
- School of Biological and Population Health, College of Public Health and Human Sciences, Corvallis, OR, USA
| | - Molly L Kile
- School of Biological and Population Health, College of Public Health and Human Sciences, Corvallis, OR, USA
| |
Collapse
|
10
|
Ciriminna R, Pecoraino M, Meneguzzo F, Pagliaro M. Expanding the Distributed Generation Concept: Toward Decentralized Energy and Water Supply. GLOBAL CHALLENGES (HOBOKEN, NJ) 2018; 2:1800006. [PMID: 31565331 PMCID: PMC6607255 DOI: 10.1002/gch2.201800006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/13/2018] [Indexed: 05/11/2023]
Abstract
Rainwater harvesting decentralizes the water supply in full analogy to what building-integrated photovoltaics and solar thermal do for electricity and heat. In this new decentralized generation scenario, the built environment is used to collect both sunlight photons and water molecules with significant economic and environmental benefits. Referring to recent progress and to real-life findings from around the world, this work provides an answer to several relevant questions of direct interest to policy makers and early adopters of broadened distributed generation. The conclusions offer guidelines for developing a successful distributed generation strategy at the regional level by unifying solar energy and water management policies.
Collapse
Affiliation(s)
- Rosaria Ciriminna
- Istituto per lo Studio dei Materiali NanostrutturatiCNRvia U. La Malfa 15390146PalermoItaly
| | | | | | - Mario Pagliaro
- Istituto per lo Studio dei Materiali NanostrutturatiCNRvia U. La Malfa 15390146PalermoItaly
| |
Collapse
|
11
|
Zhang J, Li T, Wang T, Yuan C, Zhong S, Guan T, Li Z, Wang Y, Yu H, Luo Q, Wang Y, Zhang T. Estrogenicity of halogenated bisphenol A: in vitro and in silico investigations. Arch Toxicol 2017; 92:1215-1223. [PMID: 29152682 DOI: 10.1007/s00204-017-2127-2] [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: 10/12/2017] [Accepted: 11/15/2017] [Indexed: 12/23/2022]
Abstract
The binding interactions of bisphenol A (BPA) and its halogenated derivatives (halogenated BPAs) to human estrogen receptor α ligand binding domain (hERα-LBD) was investigated using a combined in vitro and in silico approach. First, the recombinant hERα-LBD was prepared as a soluble protein in Escherichia coli BL21(DE3)pLysS. A native fluorescent phytoestrogen, coumestrol, was employed as tracer for the fluorescence polarization assay. The results of the in vitro binding assay showed that bisphenol compounds could bind to hERα-LBD as the affinity ligands. All the tested halogenated BPAs exhibited weaker receptor binding than BPA, which might be explained by the steric effect of substituents. Molecular docking studies elucidated that the halogenated BPAs adopted different conformations in the flexible hydrophobic ligand binding pocket (LBP), which is mainly dependent on their distinct halogenation patterns. The compounds with halogen substituents on the phenolic rings and on the bridging alkyl moiety acted as agonists and antagonists for hERα, respectively. Interestingly, all the compounds in the agonist conformation of hERα formed a hydrogen bond with His524, while the compounds in the antagonist conformation formed a hydrogen bond with Thr347. These docking results suggested a pivotal role of His524/Thr347 in maintaining the hERα structure in the biologically active agonist/antagonist conformation. Comparison of the calculated binding energies vs. experimental binding affinities yielded a good correlation, which might be applicable for the structure-based design of novel bisphenol compounds with reduced toxicities and for environmental risk assessment. In addition, based on hERα-LBD as a recognition element, the proposed fluorescence polarization assay may offer an alternative to chromatographic techniques for the multi-residue determination of bisphenol compounds.
Collapse
Affiliation(s)
- Jie Zhang
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Tiezhu Li
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Tuoyi Wang
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Cuiping Yuan
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Shuning Zhong
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Tianzhu Guan
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Zhuolin Li
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Yongzhi Wang
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Hansong Yu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, 130118, China
| | - Quan Luo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Yongjun Wang
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, 130033, China.
| | - Tiehua Zhang
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China.
| |
Collapse
|