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Yang FA, Hou YN, Cao C, Huang C, Shen S, Ren N, Wang AJ, Guo J, Wei W, Ni BJ. Electroactive properties of EABs in response to long-term exposure to polystyrene microplastics/nanoplastics and the underlying adaptive mechanisms. J Hazard Mater 2024; 465:133438. [PMID: 38198865 DOI: 10.1016/j.jhazmat.2024.133438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/17/2023] [Accepted: 01/02/2024] [Indexed: 01/12/2024]
Abstract
Given widespread presence of polystyrene (PS) microplastics/nanoplastics (MPs/NPs), the electroactive responses and adaptation mechanisms of electroactive biofilms (EABs) exposed long-term to PS-containing aquatic environments remain unclear. Therefore, this study investigated the impacts of PS MPs/NPs on electroactivity of EABs. Results found that EABs exhibited delayed formation upon initially exposure but displayed an increased maximum current density (Imax) after subsequent exposure for up to 55 days. Notably, EABs exposure to NH2PS NPs (EAB-NH2PSNPs) demonstrated a 50% higher Imax than the control, along with a 17.84% increase in viability and a 58.10% increase in biomass. The cytochrome c (c-Cyts) content in EAB-NH2PSNPs rose by 178.35%, benefiting the extracellular electron transfer (EET) of EABs. Moreover, bacterial community assembly indicated the relative abundance of electroactive bacteria increased to 87.56% in EAB-NH2PSNPs. The adaptability mechanisms of EABs under prolonged exposure to PS MPs/NPs predominantly operate by adjusting viability, EET, and bacterial community assembly, which were further confirmed a positive correlation with Imax through structural equation model. These findings provide deeper insights into long-term effects and mechanisms of MPs/NPs on the electroactive properties of EABs and even functional microorganisms in aquatic ecosystems.
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Affiliation(s)
- Feng-Ai Yang
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Ya-Nan Hou
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Ce Cao
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Cong Huang
- National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
| | - Shaoheng Shen
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Nanqi Ren
- National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Ai-Jie Wang
- National Technology Innovation Center of Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Jianbo Guo
- School of Civil Engineering and Architecture, Taizhou University, Taizhou 318000, Zhejiang, China
| | - Wei Wei
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Bing-Jie Ni
- Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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Chen J, Liang Q, Zheng Y, Lei Y, Gan X, Mei H, Bai C, Wang H, Ju J, Dong Q, Song Y. Polystyrene nanoplastics induced size-dependent developmental and neurobehavioral toxicities in embryonic and juvenile zebrafish. Aquat Toxicol 2024; 267:106842. [PMID: 38266469 DOI: 10.1016/j.aquatox.2024.106842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/18/2023] [Accepted: 01/16/2024] [Indexed: 01/26/2024]
Abstract
Because of widespread environmental contamination, there is growing concern that nanoplastics may pose a risk to humans and the environment. Due to their small particle size, nanoplastics may cross the blood-nerve barrier and distribute within the nervous system. The present study systematically investigated the uptake/distribution and developmental/neurobehavioral toxicities of different sizes (80, 200, and 500 nm) of polystyrene nanoplastics (PS) in embryonic and juvenile zebrafish. The results indicate that all three sizes of PS could cross the chorion, adsorb by the yolk, and distribute into the intestinal tract, eye, brain, and dorsal trunk of zebrafish, but with different patterns. The organ distribution and observed developmental and neurobehavioral effects varied as a function of PS size. Although all PS exposures induced cell death and inflammation at the cellular level, only exposures to the larger PS resulted in oxidative stress. Meanwhile, exposure to the 80 nm PS increased the expression of neural and optical-specific mRNAs. Collectively, these studies indicate that early life-stage exposures to PS adversely affect zebrafish neurodevelopment and that the observed toxicities are influenced by particle size.
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Affiliation(s)
- Jiangfei Chen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China; Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, Wenzhou Medical University, Wenzhou, 325035, PR China.
| | - Qiuju Liang
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yi Zheng
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yuhang Lei
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Xiufeng Gan
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - He Mei
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Chenglian Bai
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Haiyan Wang
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Jingjuan Ju
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China; Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, Wenzhou Medical University, Wenzhou, 325035, PR China
| | - Qiaoxiang Dong
- School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
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Ke D, Zheng J, Liu X, Xu X, Zhao L, Gu Y, Yang R, Liu S, Yang S, Du J, Chen B, He G, Dong R. Occurrence of microplastics and disturbance of gut microbiota: a pilot study of preschool children in Xiamen, China. EBioMedicine 2023; 97:104828. [PMID: 37837933 PMCID: PMC10585208 DOI: 10.1016/j.ebiom.2023.104828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 08/24/2023] [Accepted: 09/26/2023] [Indexed: 10/16/2023] Open
Abstract
BACKGROUND Microplastics (MPs) have garnered widespread attention because of their presence in human placenta, stool, and even blood. Ingestion is considered the major route of human exposure to MPs. It has been found that the consumption of food and water is associated with more MP abundance in human stools. The usage of plastic containers, particularly feeding bottles, may be a major contributor to MP contamination. However, human exposure to MPs and potential factors that influence exposure, especially for preschoolers, remains largely unknown. When exposed to MPs, mice exhibited gut microbiota dysbiosis, including alterations in diversity indices, a decreased relative abundance of probiotics and an increased abundance of pathogenic bacteria. Such results have also been observed in human gut in vitro models, however, the actual association between MP exposure and human intestinal microbiota remains unclear. Therefore, this study aimed to evaluate MP concentrations in preschoolers' stools, explore possible dietary factors that influence preschooler exposure to MPs, and investigate their potential association with the gut microbiota. METHODS A cross-sectional study was conducted in Xiamen, China in October 2022. We investigated the feeding behaviours and dietary habits of preschool children. A total of 69 couples of stool samples were collected and analyzed for MPs test and gut microbiota analysis. Pyrolysis-gas chromatography coupled with mass spectrometry (Py-GC/MS) was used for quantifying 11 types of MPs. The gut microbiota composition was analyzed by 16S rRNA gene sequencing. FINDINGS The results showed that only polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyethylene (PE), and polyamide 6 (PA6) were detected in 85.5% stool samples, with concentrations of 317.4 (152.0, 491.9) μg/g dw, 299.0 (196.1, 619.9) μg/g dw, 206.2 (154.1, 240.3) μg/g dw, and 17.9 (13.4, 18.6) μg/g dw, respectively. The median estimated daily intake (EDI) for preschoolers was 425.9 (272.5, 762.3) μg/kg-bw/d. Dairy intake may influence MP concentration in preschoolers' stools, and the usage of feeding bottles may be a specific source of MP contamination. Moreover, higher PVC concentrations were observed in the stools when the children took more time to eat a meal. MP exposure was inversely associated with alpha indices and possibly affected certain probiotic taxa, such as Parabacteroides and Alistipes, in preschool children. INTERPRETATION Our data provided baseline evidence for MP exposure doses and potential dietary factors that may influence MP exposure in preschoolers. These findings supported the perspective that MP exposure might be associated with the disturbance of gut microbiota. Further studies focusing on sensitive populations with larger sample sizes are needed. FUNDING This study was funded by the National Natural Science Foundation of China (grant number: 82003412), the Shanghai Municipal Health Commission (grant number: 20214Y0019), and the Project of Shanghai Municipal Financial Professional foundation (Food Safety Risk Assessment) (grant number: RA-2022-06).
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Affiliation(s)
- Dandan Ke
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | | | - Xinyuan Liu
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Xin Xu
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Long Zhao
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Yiying Gu
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Ruoru Yang
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Shaojie Liu
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Shuyu Yang
- Nutrilite Health Institute, Shanghai 200023, China.
| | - Jun Du
- Nutrilite Health Institute, Shanghai 200023, China.
| | - Bo Chen
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Gengsheng He
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
| | - Ruihua Dong
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Institute of Nutrition, Fudan University, Shanghai 200032, China.
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Qiu C, Zhou Y, Wang H, Chu Y, Zheng L, Chen Y, Song Y, Fang C. Microplastics enrichment characteristics of antibiotic resistance genes and pathogens in landfill leachate. Chemosphere 2023; 341:140100. [PMID: 37683946 DOI: 10.1016/j.chemosphere.2023.140100] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
Microplastics (MPs) pollution is a pressing environmental issue for aquatic ecosystems. Landfill leachate is an important contributor of MPs and antibiotic resistant genes (ARGs). However, there are few studies on the colonization of ARGs and pathogens on MPs in leachate. This study conducted incubation experiments with polyethylene terephthalate (PET) and polypropylene (PP) MPs in landfill leachate which were about 3-5 years old (PL) and 5-10 years old (AL). After incubation, the bacterial cells colonized and grew on the surface of MPs, inducing the increase of oxygenated oxygen functional groups (e.g., hydroxyl, carbonyl) on the MPs surface. Real-time PCR indicated that MPs selectively enriched ARGs, such as genes tetM, tetC, mcr-1, aac(6')-Ib-cr, blaTEM and blaSHV in leachate. The diversity of bacterial communities on MPs was significantly increased in AL leachate, but decreased in PL leachate. The differences in bacterial communities in MPs biofilms were related to the type of MPs. Compared with AL leachate, the abundance of Chloroflexi increased by 15.7% on the PET, and the abundance of Acidobacteriota increased by 6.23 fold on the PP. The abundance of Firmicutes increased from 20.7% in PL leachate to 65.8% and 60.7% on PET and PP, respectively. Additionally, pathogens were observed to be more abundant on MPs compared to leachate. In particular, pathogens (Staphylococcus, Streptococcus, Enterobacter and Rhodococcus) associated with sul1 and sul2 were generally present at higher levels on MPs than in the surrounding leachate. These results provide significant implications for understanding the health risk of MPs in the environment.
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Affiliation(s)
- Cheng Qiu
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Yiwei Zhou
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Hua Wang
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China.
| | - Yixuan Chu
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Lei Zheng
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Yongmin Chen
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Yali Song
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China
| | - Chengran Fang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang, China
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Li R, Nie J, Qiu D, Li S, Sun Y, Wang C. Toxic effect of chronic exposure to polyethylene nano/microplastics on oxidative stress, neurotoxicity and gut microbiota of adult zebrafish (Danio rerio). Chemosphere 2023; 339:139774. [PMID: 37567271 DOI: 10.1016/j.chemosphere.2023.139774] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/07/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
The rapid development of aquaculture industry has provided a large amount of high-quality animal protein, while the food safety caused by microplastics and nanoplastics (MP/NPs) has become a major concern. In addition, recent evidence has shown the potential toxic effect of PE-MP/NPs, highlighting the need for further research into their environmental and health impacts. Chronic exposure of polyethylene microplastics (PE-MPs) and nanoplastics (PE-NPs) on adult zebrafish were conducted in the present study for 21 d. Organ-dependent oxidative damage induced by MP/NPs was observed. Insignificant differences in neurotoxicity and dysbiosis of gut microbiota were found between MPs and NPs. Changes in glutathione S-transferase (GST), glutathione (GSH), catalase (CAT), lipid peroxidation (LPO), and superoxide dismutase (SOD) showed that MP/NPs induced oxidative damage in gill and intestinal cells of zebrafish. The inhibited AChE activity suggested the potential neurotoxicity of microplastics and nanoplastics (MP/NPs). In addition, chronic exposure increased the alpha-diversity of intestinal microbiota. At the phylum level, the average relative abundance of Proteobacteria increased from 29.73% (control group) to 66.10% (microplastics), 54.84% (nanoplastics) and 60.03% (combined exposure), respectively. Tenericutes decreased from 55.43% (control group) to 20.02% (microplastics), 22.44% (nanoplastics) and 31.77% (combined exposure), respectively. Overall, this study provides new insights and objective evidence for the toxicity assessment of PE-MPs.
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Affiliation(s)
- Ruixuan Li
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Jingjing Nie
- Yunnan Ecological Environmental Emergency Investigation and Complaint Center, Kunming, 650034, China
| | - Denggao Qiu
- Key Laboratory of Cultivation and High-value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, Xiamen, 361000, China
| | - Shuangshuang Li
- College of Energy and Environmental Engineering, Hebei University of Engineering, Handan, 056038, China
| | - Yingxue Sun
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Chun Wang
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
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Zolotova N, Dzhalilova D, Tsvetkov I, Makarova O. Influence of Microplastics on Morphological Manifestations of Experimental Acute Colitis. Toxics 2023; 11:730. [PMID: 37755741 PMCID: PMC10536389 DOI: 10.3390/toxics11090730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 09/28/2023]
Abstract
Microplastic pollution poses a threat to human health. It is possible that the increase in the incidence of inflammatory bowel disease is associated with exposure to microplastics. We investigated the effect of the consumption of polystyrene microparticles with a diameter of 5 μm at a dose of 2.3 mg/kg/day for 6 weeks on morphological changes in the colons of healthy male C57BL/6 mice and of mice with acute colitis induced by a 1% dextran sulfate sodium solution (DSS). In healthy mice, microplastics caused an increase in the number of endocrine cells, an increase in the content of highly sulfated mucins in goblet cells, an increase in the number of cells in the lamina propria, and a decrease in the volume fraction of macrophages. Microplastic consumption caused more severe acute colitis, which is characterized by a greater prevalence of ulcers and inflammation and a decrease in the content of neutral mucins in goblet cells.
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Affiliation(s)
| | - Dzhuliia Dzhalilova
- Department of Immunomorphology of Inflammation, Avtsyn Research Institute of Human Morphology of Federal State Budgetary Scientific Institution “Petrovsky National Research Centre of Surgery”, 117418 Moscow, Russia; (N.Z.); (I.T.); (O.M.)
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Mills CL, Savanagouder J, de Almeida Monteiro Melo Ferraz M, Noonan MJ. The need for environmentally realistic studies on the health effects of terrestrial microplastics. Microplast nanoplast 2023; 3:11. [PMID: 37228296 PMCID: PMC10202987 DOI: 10.1186/s43591-023-00059-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 05/14/2023] [Indexed: 05/27/2023]
Abstract
Plastic pollution is now so widespread that microplastics are regularly detected in biological samples surveyed for their presence. Despite their pervasiveness, very little is known about the effects of microplastics on the health of terrestrial vertebrates. While emerging studies are showing that microplastics represent a potentially serious threat to animal health, data have been limited to in vivo studies on laboratory rodents that were force fed plastics. The extent to which these studies are representative of the conditions that animals and humans might actually experience in the real world is largely unknown. Here, we review 114 papers from the peer-reviewed literature in order to understand how the concentrations and types of microplastics being administered to rodents in lab studies compare to those found in terrestrial soils. From 73 in vivo lab studies, and 41 soil studies, we found that lab studies have heretofore fed rodents microplastics at concentrations that were hundreds of thousands of times greater than they would be exposed to in nature. Furthermore, health effects have been studied for only 20% of the microplastic polymers that are known to occur in soils. Plastic pollution is arguably one of the most pressing ecological and public health issues of our time, yet existing lab-based research on the health effects of terrestrial microplastics does not reflect the conditions that free-ranging vertebrates are actually experiencing. Going forward, performing more true-to-life research will be of the utmost importance to fully understand the impacts of microplastics and maintain the public's faith in the scientific process. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1186/s43591-023-00059-1.
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Affiliation(s)
- C. Lauren Mills
- Department of Biology, The Irving K. Barber Faculty of Science, The University of British Columbia, Okanagan Campus, Kelowna, BC Canada
| | - Joy Savanagouder
- Department of Biology, The Irving K. Barber Faculty of Science, The University of British Columbia, Okanagan Campus, Kelowna, BC Canada
| | | | - Michael J. Noonan
- Department of Biology, The Irving K. Barber Faculty of Science, The University of British Columbia, Okanagan Campus, Kelowna, BC Canada
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Farag AA, Youssef HS, Sliem RE, El Gazzar WB, Nabil N, Mouktar MM, Marei YM, Ismail NS, Radwaan SE, Badr AM, Sayed AEDH. Hematological Consequences of Polyethylene Microplastics Toxicity in Male Rats: Oxidative stress, Genetic, and Epigenetic links. Toxicology 2023; 492:153545. [PMID: 37169321 DOI: 10.1016/j.tox.2023.153545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/02/2023] [Accepted: 05/09/2023] [Indexed: 05/13/2023]
Abstract
Microplastics (MPs) pollution is a newly emerging environmental issue. MPs can accumulate within animals and humans, which can pose a serious health threat. Petroleum-based polyethylene (PE) is one of the most popular plastics. Accordingly, its exposure rates have steadily increased over the years. This study aimed to analyze the effects of PE-MPs on the hematological system of albino rats and the epigenetic effect. Five groups of adult male eight-weeks-old rats received either distilled water, corn oil, 3.75mg/kg PE-MPs, 15mg/kg PE-MPs, or 60mg/kg of PE-MPs, daily by oral gavage for 35 days. PE-MPs significantly increased the body weights of the rats and lipid peroxidation, with concomitant reduction of superoxide dismutase activity and depletion of reduced glutathione, thus adversely affecting oxidants/antioxidants balance. Moreover, PE-MPs increased the % of abnormal RBCs, irregular cells, tear drop cells, Schistocyte cells, and folded cells. The genotoxic effects on DNA were evident by increased DNA damage, confirmed by the comet assay, in addition to increased DNA methylation. The effects of PE-MPs have been shown to be dose correlated. In conclusion, this study provides evidence of dose-related PE-MPs-induced hematological, genotoxic, and epigenetic effects in mammals, and thus emphasizes the potentially hazardous health effects of environmental PE-MPs.
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Affiliation(s)
- Amina A Farag
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Heba S Youssef
- Department of Physiology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Rania E Sliem
- Department of Zoology, Faculty of Science, Benha University, 13518, Egypt
| | - Walaa Bayoumie El Gazzar
- Department of Anatomy, Physiology and Biochemistry, Faculty of Medicine, The Hashemite University, Zarqa 13133, Jordan; Department of Medical Biochemistry and molecular biology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Nashwa Nabil
- Department of community, Environmental and occupational medicine, Faculty of Medicine, Benha University, 13518, Egypt
| | - Maha M Mouktar
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Yasmin M Marei
- Department of Medical Biochemistry and molecular biology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Nesma S Ismail
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Benha University, 13518, Egypt
| | - Shaimaa E Radwaan
- Department of Zoology, Faculty of Science, Benha University, 13518, Egypt
| | - Amira M Badr
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Saud University, Riyadh 11211, Saudi Arabia; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Alaa El-Din Hamid Sayed
- Department of Zoology, Faculty of Science, Assiut University, 71516, Egypt; Molecular Biology Research & Studies Institute, Assiut University, 71516 Assiut, Egypt.
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