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Lei B, Wang X, Wang L, Kang Y, Wan T, Li W, Yang Q, Zhang J. Combining chemical analysis and toxicological methods to access the ecological risk of complex contamination in Daye Lake. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 944:173690. [PMID: 38825198 DOI: 10.1016/j.scitotenv.2024.173690] [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: 11/23/2023] [Revised: 05/14/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
As one of the nine primary non-ferrous metal smelting bases in China, Daye Lake basin was polluted due to diverse human activities. But so far the pollution status and related ecological risks of this region have not been detailly investigated. In current study, pollutants including heavy metals, polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in eight sediment samples from Daye Lake were quantified. 18S rRNA gene sequencing was employed to profile the nematode community structure within these sediments. Model organism Caenorhabditis elegans (C. elegans) were further applied for a comprehensive ecological risk assessment of Daye Lake. Notably, Cadmium (Cd) was identified as a key driver of ecological risk, reaching an index of 1287.35. At sample point S4, OCPs particularly p,p'-DDT, displayed an extreme ecological risk with a value of 23.19. Cephalobidae and Mononchida showed strong sensitivity to pollutant levels, reinforcing their suitability as robust bioindicators. The composite pollutants in sampled sediments caused oxidative stress in C. elegans, with gene Vit-2 and Mtl-1 as sensitive biomarkers. By employing the multiple analysis methods, our data can offer valuable contributions to environmental monitoring and health risk assessment for composite polluted areas.
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Affiliation(s)
- Bo Lei
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xin Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Ling Wang
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Yue Kang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Tianying Wan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenjuan Li
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Qingqing Yang
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Jie Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
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Da YM, Li SS, Li YQ, Deng LY, Li MJ, Huang T, Sun QY, Shirin J, Zhou GW. Effects of cadmium on the intestinal health of the snail Bradybaena ravida Benson. ECOTOXICOLOGY (LONDON, ENGLAND) 2024:10.1007/s10646-024-02783-7. [PMID: 39001972 DOI: 10.1007/s10646-024-02783-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/05/2024] [Indexed: 07/15/2024]
Abstract
The heavy metal cadmium (Cd) is a toxic and bioaccumulative metal that can be enriched in the tissues and organs of living organisms through the digestive tract. However, more research is needed to determine whether food-sourced Cd affects the homeostasis of host gut microflora. In this study, the snail Bradybaena ravida (Benson) was used as a model organism fed with mulberry leaves spiked with different concentrations of Cd (0, 0.052, 0.71, and 1.94 mg kg-1). By combining 16S rRNA high-throughput sequencing with biochemical characterization, it was found that there were increases in the overall microbial diversity and abundances of pathogenic bacteria such as Corynebacterium, Enterococcus, Aeromonas, and Rickettsia in the gut of B. ravida after exposure to Cd. However, the abundances of potential Cd-resistant microbes in the host's gut, including Sphingobacterium, Lactococcus, and Chryseobacterium, decreased with increasing Cd concentrations in the mulberry leaves. In addition, there was a significant reduction in activities of energy, nutrient metabolism, and antioxidant enzymes for gut microbiota of snails treated with high concentrations of Cd compared to those with low ones. These findings highlight the interaction of snail gut microbiota with Cd exposure, indicating the potential role of terrestrial animal gut microbiota in environmental monitoring through rapid recognition and response to environmental pollution.
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Affiliation(s)
- Yan-Mei Da
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Shun-Shun Li
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Yan-Qi Li
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Le-Yu Deng
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Ming-Jun Li
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Tao Huang
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Qing-Ye Sun
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Jazbia Shirin
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China
| | - Guo-Wei Zhou
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui Province, China.
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Miller BC, Mathai M, Yadav H, Jain S. Geroprotective potential of microbiome modulators in the Caenorhabditis elegans model. GeroScience 2024; 46:129-151. [PMID: 37561384 PMCID: PMC10828408 DOI: 10.1007/s11357-023-00901-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 08/01/2023] [Indexed: 08/11/2023] Open
Abstract
Aging is associated with cellular and physiological changes, which significantly reduce the quality of life and increase the risk for disease. Geroprotectors improve lifespan and slow the progression of detrimental aging-related changes such as immune system senescence, mitochondrial dysfunction, and dysregulated nutrient sensing and metabolism. Emerging evidence suggests that gut microbiota dysbiosis is a hallmark of aging-related diseases and microbiome modulators, such as probiotics (live bacteria) or postbiotics (non-viable bacteria/bacterial byproducts) may be promising geroprotectors. However, because they are strain-specific, the geroprotective effects of probiotics and postbiotics remain poorly understood and understudied. Drosophila melanogaster, Caenorhabditis elegans, and rodents are well-validated preclinical models for studying lifespan and the role of probiotics and/or postbiotics, but each have their limitations, including cost and their translation to human aging biology. C. elegans is an excellent model for large-scale screening to determine the geroprotective potential of drugs or probiotics/postbiotics due to its short lifecycle, easy maintenance, low cost, and homology to humans. The purpose of this article is to review the geroprotective effects of microbiome modulators and their future scope, using C. elegans as a model. The proposed geroprotective mechanisms of these probiotics and postbiotics include delaying immune system senescence, preventing or reducing mitochondrial dysfunction, and regulating food intake (dietary restriction) and metabolism. More studies are warranted to understand the geroprotective potential of probiotics and postbiotics, as well as other microbiome modulators, like prebiotics and fermented foods, and use them to develop effective therapeutics to extend lifespan and reduce the risk of debilitating aging-related diseases.
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Affiliation(s)
- Brandi C Miller
- USF Center for Microbiome Research, Microbiomes Institute, University of South Florida, 12901 Bruce B Downs Blvd, MDC 78, Tampa, FL, 33612, USA
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL, USA
| | - Megha Mathai
- USF Center for Microbiome Research, Microbiomes Institute, University of South Florida, 12901 Bruce B Downs Blvd, MDC 78, Tampa, FL, 33612, USA
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL, USA
| | - Hariom Yadav
- USF Center for Microbiome Research, Microbiomes Institute, University of South Florida, 12901 Bruce B Downs Blvd, MDC 78, Tampa, FL, 33612, USA
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL, USA
| | - Shalini Jain
- USF Center for Microbiome Research, Microbiomes Institute, University of South Florida, 12901 Bruce B Downs Blvd, MDC 78, Tampa, FL, 33612, USA.
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL, USA.
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Udayakumar P, Das R, Kannadasan A. Significance of probiotics in remodeling the gut consortium to enhance the immunity of Caenorhabditis elegans. Genesis 2021; 59:e23454. [PMID: 34664387 DOI: 10.1002/dvg.23454] [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: 08/09/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/10/2022]
Abstract
In the recent past, Caenorhabditis elegans has emerged as one of the leading nematode models for studying host-microbe interactions on molecular, cellular, or organismal levels. In general, morphological and functional similarities of the gut of C. elegans with respect to that of human has brought in speculations on the study of the intestinal microbiota. On the other hand, probiotics have proved their efficacy in metabolism, development, and pathogenesis thereby inducing an immune response in C. elegans. Nurturing C. elegans with probiotics has led to immunomodulatory effects in the intestinal microbiota, proposing C. elegans as one of the in vivo screening criteria to select potential probiotic bacteria for host health-promoting factors. The major prospect of these probiotics is to exert longevity toward the host in diverse environmental conditions. The extent of research on probiotic metabolism has shed light on mechanisms of the immunomodulatory effect exerted by the nematode model. This review discusses various aspects of the effects of probiotics in improving the health and mechanisms involved in conferring immunity in C. elegans.
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Affiliation(s)
- Prithika Udayakumar
- Dr. APJ Abdul Kalam Centre for Excellence in Innovation and Entrepreneurship, Dr. M.G.R. Educational and Research Institute, Chennai, India
| | - Reena Das
- Dr. APJ Abdul Kalam Centre for Excellence in Innovation and Entrepreneurship, Dr. M.G.R. Educational and Research Institute, Chennai, India
| | - Anandbabu Kannadasan
- Dr. APJ Abdul Kalam Centre for Excellence in Innovation and Entrepreneurship, Dr. M.G.R. Educational and Research Institute, Chennai, India
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Li Y, Zhong L, Zhang L, Shen X, Kong L, Wu T. Research Advances on the Adverse Effects of Nanomaterials in a Model Organism, Caenorhabditis elegans. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2406-2424. [PMID: 34078000 DOI: 10.1002/etc.5133] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/03/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
Along with the rapid development of nanotechnology, the biosafety assessment of nanotechnology products, including nanomaterials (NMs), has become more and more important. The nematode Caenorhabditis elegans is a valuable model organism that has been widely used in the field of biology because of its excellent advantages, including low cost, small size, short life span, and highly conservative genomes with vertebral animals. In recent years, the number of nanotoxicological researchers using C. elegans has been growing. According to these available studies, the present review classified the adverse effects of NMs in C. elegans into systematic, cellular, and molecular toxicity, and focused on summarizing and analyzing the underlying mechanisms of metal, metal oxide, and nonmetallic NMs causing toxic effects in C. elegans. Our findings provide insights into what further studies are needed to assess the biosafety of NMs in the ecosystem using C. elegans. Environ Toxicol Chem 2021;40:2406-2424. © 2021 SETAC.
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Affiliation(s)
- Yimeng Li
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
| | - Lishi Zhong
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
| | - Lili Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
| | - Xiaobing Shen
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
| | - Lu Kong
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
| | - Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People's Republic of China
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6
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An M, Chang D, Hong D, Fan H, Wang K. Metabolic regulation in soil microbial succession and niche differentiation by the polymer amendment under cadmium stress. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126094. [PMID: 34492903 DOI: 10.1016/j.jhazmat.2021.126094] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/26/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
Cadmium (Cd) contamination seriously threatens the agricultural production, so exploring the response of soil microenvironment to amendments in Cd-contaminated soils is of importance. In this study, the mechanism of remediation of Cd-contaminated soil using the polymer amendment was studied in cotton flowering stage. The results showed that the concentration of Cd in cotton root and various Cd forms in Cd-contaminated soils were obviously high. High concentration of Cd, especially exchangeable Cd, could seriously affect the soil microenvironment. The root growth of cotton could be promoted, the carbon and nitrogen concentration and storage in soil were increased by 21.72-50.00%, while the exchangeable Cd concentration in soil were decreased by 41.43%, after applying the polymer amendment. In addition, the polymer amendment affected the soil microbial niche, increased the relative abundance of soil bacteria (Flaviaesturariibacter, Rubellimicrobium, and Cnuella), fungi (Verticillium and Tricharina), actinomycetes (Blastococcus and Nocardioides), and fungivores nematodes (Aphelenchus), and improved soil microbial metabolic functions (metabolism of nucleotides and carbohydrates). Therefore, this polymer amendment could be used to remediate severe Cd-contaminated soils, and the changes in the microbial and nematode communities help us understand the detoxification mechanism of the polymer amendment in Cd-contaminated soils.
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Affiliation(s)
- Mengjie An
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Doudou Chang
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Dashuang Hong
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Hua Fan
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Kaiyong Wang
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China.
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7
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Sandner G, König A, Wallner M, Weghuber J. Alternative model organisms for toxicological fingerprinting of relevant parameters in food and nutrition. Crit Rev Food Sci Nutr 2021; 62:5965-5982. [PMID: 33683153 DOI: 10.1080/10408398.2021.1895060] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
In the field of (food) toxicology, there is a strong trend of replacing animal trials with alternative methods for the assessment of adverse health effects in humans. The replacement of animal trials is not only driven by ethical concerns but also by the number of potential testing substances (food additives, packaging material, contaminants, and toxicants), which is steadily increasing. In vitro 2D cell culture applications in combination with in silico modeling might provide an applicable first response. However, those systems lack accurate predictions of metabolic actions. Thus, alternative in vivo models could fill the gap between cell culture and animal trials. In this review, we highlight relevant studies in the field and spotlight the applicability of alternative models, including C. elegans, D. rerio, Drosophila, HET-CAM and Lab-on-a-chip.
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Affiliation(s)
- Georg Sandner
- Center of Excellence Food Technology and Nutrition, University of Applied Sciences Upper Austria, Wels, Austria
| | - Alice König
- Center of Excellence Food Technology and Nutrition, University of Applied Sciences Upper Austria, Wels, Austria.,FFoQSI GmbH-Austrian Competence Centre for Feed and Food Quality, Safety and Innovation, Tulln, Austria
| | - Melanie Wallner
- Center of Excellence Food Technology and Nutrition, University of Applied Sciences Upper Austria, Wels, Austria.,FFoQSI GmbH-Austrian Competence Centre for Feed and Food Quality, Safety and Innovation, Tulln, Austria
| | - Julian Weghuber
- Center of Excellence Food Technology and Nutrition, University of Applied Sciences Upper Austria, Wels, Austria.,FFoQSI GmbH-Austrian Competence Centre for Feed and Food Quality, Safety and Innovation, Tulln, Austria
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8
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Hartman JH, Widmayer SJ, Bergemann CM, King DE, Morton KS, Romersi RF, Jameson LE, Leung MCK, Andersen EC, Taubert S, Meyer JN. Xenobiotic metabolism and transport in Caenorhabditis elegans. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2021; 24:51-94. [PMID: 33616007 PMCID: PMC7958427 DOI: 10.1080/10937404.2021.1884921] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Caenorhabditis elegans has emerged as a major model in biomedical and environmental toxicology. Numerous papers on toxicology and pharmacology in C. elegans have been published, and this species has now been adopted by investigators in academic toxicology, pharmacology, and drug discovery labs. C. elegans has also attracted the interest of governmental regulatory agencies charged with evaluating the safety of chemicals. However, a major, fundamental aspect of toxicological science remains underdeveloped in C. elegans: xenobiotic metabolism and transport processes that are critical to understanding toxicokinetics and toxicodynamics, and extrapolation to other species. The aim of this review was to initially briefly describe the history and trajectory of the use of C. elegans in toxicological and pharmacological studies. Subsequently, physical barriers to chemical uptake and the role of the worm microbiome in xenobiotic transformation were described. Then a review of what is and is not known regarding the classic Phase I, Phase II, and Phase III processes was performed. In addition, the following were discussed (1) regulation of xenobiotic metabolism; (2) review of published toxicokinetics for specific chemicals; and (3) genetic diversity of these processes in C. elegans. Finally, worm xenobiotic transport and metabolism was placed in an evolutionary context; key areas for future research highlighted; and implications for extrapolating C. elegans toxicity results to other species discussed.
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Affiliation(s)
- Jessica H Hartman
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Samuel J Widmayer
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois, United States
| | | | - Dillon E King
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Katherine S Morton
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Riccardo F Romersi
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Laura E Jameson
- School of Mathematical and Natural Sciences, Arizona State University - West Campus, Glendale, Arizona, United States
| | - Maxwell C K Leung
- School of Mathematical and Natural Sciences, Arizona State University - West Campus, Glendale, Arizona, United States
| | - Erik C Andersen
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois, United States
| | - Stefan Taubert
- Dept. Of Medical Genetics, Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, the University of British Colombia, Vancouver, BC, Canada
| | - Joel N Meyer
- Nicholas School of the Environment, Duke University, Durham, North Carolina
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Slowinski S, Ramirez I, Narayan V, Somayaji M, Para M, Pi S, Jadeja N, Karimzadegan S, Pees B, Shapira M. Interactions with a Complex Microbiota Mediate a Trade-Off between the Host Development Rate and Heat Stress Resistance. Microorganisms 2020; 8:microorganisms8111781. [PMID: 33202910 PMCID: PMC7697855 DOI: 10.3390/microorganisms8111781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 12/28/2022] Open
Abstract
Animals and plants host diverse communities of microorganisms, and these microbiotas have been shown to influence host life history traits. Much has been said about the benefits that host-associated microbiotas bestow on the host. However, life history traits often demonstrate tradeoffs among one another. Raising Caenorhabditis elegans nematodes in compost microcosms emulating their natural environment, we examined how complex microbiotas affect host life history traits. We show that soil microbes usually increase the host development rate but decrease host resistance to heat stress, suggesting that interactions with complex microbiotas may mediate a tradeoff between host development and stress resistance. What element in these interactions is responsible for these effects is yet unknown, but experiments with live versus dead bacteria suggest that such effects may depend on bacterially provided signals.
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Affiliation(s)
- Samuel Slowinski
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
- Department of Biology, 4223 Biology-Psychology Bldg., University of Maryland, College Park, MD 20742, USA
- Correspondence: (S.S.); (M.S.)
| | - Isabella Ramirez
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Vivek Narayan
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Medha Somayaji
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Maya Para
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Sarah Pi
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Niharika Jadeja
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Siavash Karimzadegan
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Barbara Pees
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Michael Shapira
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
- Correspondence: (S.S.); (M.S.)
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10
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Qu M, Li D, Qiu Y, Wang D. Neuronal ERK MAPK signaling in response to low-dose nanopolystyrene exposure by suppressing insulin peptide expression in Caenorhabditis elegans. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 724:138378. [PMID: 32272418 DOI: 10.1016/j.scitotenv.2020.138378] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/13/2020] [Accepted: 03/30/2020] [Indexed: 05/21/2023]
Abstract
The responses of different organs are important for organisms against the toxicity of environmental toxicants. So far, the neuronal response to nanoplastic exposure and the underlying mechanisms are still largely unclear. Due to the sensitivity to environmental exposures, we here employed Caenorhabditis elegans as an animal model to examine the role of ERK MAPK signaling pathway in the neurons to regulate the response to nanopolystyrene (100 nm). Nanopolystyrene exposure in the range of μg/L could significantly increase expressions of genes (lin-45, mek-2, and mpk-1) encoding ERK MAPK signaling pathway. Nanopolystyrene at the predicted environmental concentration of 1 μg/L could only significantly increase the mpk-1 expression. Meanwhile, RNAi knockdown of any of these genes caused a susceptibility to nanopolystyrene toxicity. ERK/MPK-1 acted in the neurons to regulate the response to nanopolystyrene. Moreover, three genes (ins-4, ins-39, and daf-28) encoding insulin peptides were identified as the downstream targeted genes of neuronal mpk-1 in regulating the response to nanopolystyrene. In nanopolystyrene exposed nematodes, neuronal RNAi knockdown of ins-4, ins-39, or daf-28 decreased expression of intestinal daf-2 encoding insulin receptor and increased expression of intestinal daf-16 encoding FOXO transcriptional factor. Therefore, the neuronal ERK MAPK signaling responded to nanopolystyrene by modulating the insulin signaling-mediated communication between neurons and intestine in nematodes. Our findings are helpful for understanding the molecular basis of neuronal response to nanopolystyrene in organisms.
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Affiliation(s)
- Man Qu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Dan Li
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Yuexiu Qiu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China.
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