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Zang X, He M, Xu Y, Che T, Wang F, Xu J, Zhang H, Hu F, Xu L. Metaphire guillelmi exhibited predominant capacity of arsenic efflux. CHEMOSPHERE 2024; 361:142479. [PMID: 38815813 DOI: 10.1016/j.chemosphere.2024.142479] [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: 03/19/2024] [Revised: 05/15/2024] [Accepted: 05/27/2024] [Indexed: 06/01/2024]
Abstract
Earthworm could regulate their body concentration of arsenic via storage or excretion, and the ability of As efflux among different earthworms is not consistent. Here, whole and semi As exposure patterns with 0-10-30-60-100 mg kg-1 exposure concentrations were set to characterize the As efflux in geophagous earthworm, Metaphire guillelmi. Cast As (As-C) and earthworms' antioxidative responses were monitored to explore the efflux mechanisms under 30 mg kg-1 As-spiked soil (As30), besides, As concentration in earthworm tissue after egestion and dissection depurations were compared. In the whole exposure pattern, As concentration in gut content (As-G, 19.2-120.3 mg kg-1) surpassed that in the tissue (As-T, 17.2-53.2 mg kg-1), and they both increased with exposure concentrations. With the prolong time, they firstly increased and kept stable between day 10-15, then As-G increased while As-T decreased between day 15-20. In the semi-exposure pattern, both As-G and As-T decreased when M. guillelmi was transferred to clean soil for 5 days. During the 42-day incubation in As30, the antioxidative responses including reactive oxygen species (ROS), glutathione (GSH) and glutathione-S-transferase (GST) were firstly increased and then decreased, and As-C (13.9-43.9 mg kg-1) kept higher than As-G (14.2-35.1 mg kg-1). Significantly positive correlations were found between As-T and GSH, As-C and GST. Moreover, tissue As after dissection (11.6-22.9 mg kg-1) was obviously lower than that after egestion (11.4-26.4 mg kg-1), but significantly related to ROS and GSH. Taken together, M. guillelmi exhibited excellent capacity of As efflux, and GSH explained tissue As accumulation while GST facilitated the As elimination via cast. Besides, dissection instead of egestion revealed the As efflux in M. guillelmi more accurately. These findings contributed to a better understanding of how geophagous earthworm M. guillelmi regulated tissue As accumulation for As stress tolerance, and recommended an optimal depuration mode to characterize As accumulation.
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Affiliation(s)
- Xiayun Zang
- Asia Hub, Sanya Institute of Nanjing Agricultural University, Sanya, 572025, Hainan, China; College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, Jiangsu, China
| | - Mingyue He
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Yuanzhou Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Ting Che
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Fei Wang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jingjing Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Huijuan Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Feng Hu
- Asia Hub, Sanya Institute of Nanjing Agricultural University, Sanya, 572025, Hainan, China; College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, Jiangsu, China
| | - Li Xu
- Asia Hub, Sanya Institute of Nanjing Agricultural University, Sanya, 572025, Hainan, China; College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, Jiangsu, China.
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Zhang H, Zhou Q, Liu R, Zhao Z, Liu J, Siddique KHM, Mao H. Enhancing zinc biofortification and mitigating cadmium toxicity in soil-earthworm-spinach systems using different zinc sources. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135243. [PMID: 39029182 DOI: 10.1016/j.jhazmat.2024.135243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 06/16/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
Cadmium (Cd) pollution poses significant threats to soil organisms and human health by contaminating the food chain. This study aimed to assess the impact of various concentrations (50, 250, and 500 mg·kg-1) of zinc oxide nanoparticles (ZnO NPs), bulk ZnO, and ZnSO4 on morphological changes and toxic effects of Cd in the presence of earthworms and spinach. The results showed that Zn application markedly improved spinach growth parameters (such as fresh weight, plant height, root length, and root-specific surface area) and root morphology while significantly reducing Cd concentration and Cd bioconcentration factors (BCF-Cd) in spinach and earthworms, with ZnO NPs exhibiting the most pronounced effects. Earthworm, spinach root, and shoot Cd concentration decreased by 82.3 %, 77.0 %, and 75.6 %, respectively, compared to CK. Sequential-step extraction (BCR) analysis revealed a shift in soil Cd from stable to available forms, consistent with the available Cd (DTPA-Cd) results. All Zn treatments significantly reduced Cd accumulation, alleviated Cd-induced stress, and promoted spinach growth, with ZnO NPs demonstrating the highest Cd reduction and Zn bioaugmentation efficiencies compared to bulk ZnO and ZnSO4 at equivalent concentrations. Therefore, ZnO NPs offer a safer and more effective option for agricultural production and soil heavy metal pollution management than other Zn fertilizers.
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Affiliation(s)
- Haoyue Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, Shaanxi, China
| | - Qianqian Zhou
- Lanzhou Industry Research Institute, Lanzhou 730050, Gansu, China
| | - Ruiyu Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zimo Zhao
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jinshan Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia
| | - Hui Mao
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, Shaanxi, China.
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3
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Li Y, Pan Y, Yin Y, Huang R. Integrating Transcriptomics and Proteomics to Characterize the Intestinal Responses to Cadmium Exposure Using a Piglet Model. Int J Mol Sci 2024; 25:6474. [PMID: 38928180 PMCID: PMC11203886 DOI: 10.3390/ijms25126474] [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: 04/17/2024] [Revised: 05/18/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Cadmium (Cd) is a heavy metal element with a wide range of hazards and severe biotoxicity. Since Cd can be easily accumulated in the edible parts of plants, the exposure of humans to Cd is mainly through the intake of Cd-contaminated food. However, the intestinal responses to Cd exposure are not completely characterized. Herein, we simulated laboratory and environmental Cd exposure by feeding the piglets with CdCl2-added rice and Cd-contaminated rice (Cdcr) contained diet, as piglets show anatomical and physiological similarities to humans. Subsequent analysis of the metal element concentrations showed that exposure to the two types of Cd significantly increased Cd levels in piglets. After verifying the expression of major Cd transporters by Western blots, multi-omics further expanded the possible transporters of Cd and found Cd exposure causes wide alterations in the metabolism of piglets. Of significance, CdCl2 and Cdcr exhibited different body distribution and metabolic rewiring, and Cdcr had stronger carcinogenic and diabetes-inducing potential. Together, our results indicate that CdCl2 had a significant difference compared with Cdcr, which has important implications for a more intense study of Cd toxicity.
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Affiliation(s)
- Yikun Li
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China;
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Yiling Pan
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Yulong Yin
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Ruilin Huang
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
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Sekulić J, Mrkalić E, Stojanović-Petrović M, Popović F, Trakić T. Assessments of the impact of metals on juvenile earthworms (Eisenia fetida) in laboratory conditions. KRAGUJEVAC JOURNAL OF SCIENCE 2022. [DOI: 10.5937/kgjsci2244255s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
The aim of this study was to evaluate the impact of different concentrations of copper and zinc on the mortality and bodyweight of juvenile earthworms in artificial soil. Copper was more toxic with complete mortality at the dose rate of 1000 mg/kg. Bodyweight loss of earthworms was observed immediately, after the first week, except at the lowest concentration. In comparison to control, there were significant differences in the bodyweight loss every week in the concentrations of 333 and 666 mg/kg, and also 167 mg/kg in the fourth, sixth, and eighth week. Zinc has not shown a significant effect on mortality, except in the highest concentration, where survival was less than 25%. Statistically significant effect (p < 0.05) on bodyweight was registered only at the highest concentration, every week. The impact of metals on earthworm populations should be more accurately assessed, and data for juvenile earthworms should be considered when proposing a safe concentration of pollutants in the environment, because of the great importance of these animals' presence in the soil.
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Matić D, Vlahović M, Ilijin L, Grčić A, Filipović A, Todorović D, Perić-Mataruga V. Implications of long-term exposure of a Lymantria dispar L. population to pollution for the response of larval midgut proteases and acid phosphatases to chronic cadmium treatment. Comp Biochem Physiol C Toxicol Pharmacol 2021; 250:109172. [PMID: 34461292 DOI: 10.1016/j.cbpc.2021.109172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/04/2021] [Accepted: 08/22/2021] [Indexed: 11/18/2022]
Abstract
Cadmium (Cd) presence in terrestrial ecosystems is a serious threat that requires continuous development of biomonitoring tools. Ideally, a suitable biomarker of exposure should respond to the toxicant consistently in different populations regardless of previous exposure to pollution. Here we considered the activities and isoform patterns of certain proteases and acid phosphatases (ACP) in the midgut of Lymantria dispar larvae as well as the integrated biomarker response (IBR) for application in Cd biomonitoring. We compared the responses of caterpillars originating from unpolluted and polluted localities after they had been chronically subjected to dietary Cd (50 and 100 μg Cd/g dry food). The population inhabiting the unpolluted forest was far more sensitive to Cd exposure as the activities of total proteases, trypsin (TRY) and leucine aminopeptidase (LAP) were mostly reduced while the activities of total and non-lysosomal ACP were increased. Non-lysosomal ACP activity was elevated in larvae from the contaminated site in response to the higher Cd concentration. Exposure to the metal resulted in numerous alterations in the pattern of enzyme isoforms, but the responses of the two populations were similar except that larvae from the polluted locality were more tolerant to the lower Cd concentration. Non-lysosomal ACP activity and the appearance of ACP isoforms 4 and 5 together with the IBR index are the most promising indicators of Cd presence, potentially applicable even in populations with a history of exposure to pollution. TRY and total ACP activities could be used to monitor populations at uncontaminated localities.
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Affiliation(s)
- Dragana Matić
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia.
| | - Milena Vlahović
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
| | - Larisa Ilijin
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
| | - Anja Grčić
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
| | - Aleksandra Filipović
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
| | - Dajana Todorović
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
| | - Vesna Perić-Mataruga
- Department of Insect Physiology and Biochemistry, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia
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Toyomaki H, Yabe J, Nakayama SMM, Yohannes YB, Muzandu K, Mufune T, Nakata H, Ikenaka Y, Kuritani T, Nakagawa M, Choongo K, Ishizuka M. Lead concentrations and isotope ratios in blood, breastmilk and feces: contribution of both lactation and soil/dust exposure to infants in a lead mining area, Kabwe, Zambia. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 286:117456. [PMID: 34052649 DOI: 10.1016/j.envpol.2021.117456] [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: 09/16/2020] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
Lead (Pb) poses a serious public health concern. Breastmilk may be a possible source of Pb exposure in infants, as Pb can be transferred from the maternal blood to breastmilk. The present study was undertaken to determine the Pb exposure and the contribution of lactation as one of the exposure pathways to infants in a Pb mining area, Kabwe, Zambia. Blood, breastmilk and infants' feces were collected from 418 pairs of infants and mothers. The Pb concentrations, isotope ratios in the samples, and biochemistry in mothers' plasma were analyzed. The overall mean of blood lead levels (BLLs) in infants and mothers were 18.0 and 11.3 μg/dL, respectively. High Pb concentration in breastmilk (range: 0.4-51.9, mean: 5.3 μg/L) above the WHO acceptable level between 2 and 5 μg/L were found and could be one of the sources of Pb exposure in infants. The Pb isotope ratios in infants' feces were the most similar to Pb ratios in the soil samples. The results suggest that infants are also exposed to Pb from the environment. Pb exposure in infants through breastfeeding and soil ingestion could potentially exceed daily intake of Pb which causes neurodevelopmental toxicity. In contrast to the high BLLs in mothers, the plasma biochemical profiles of most analyzed parameters were interestingly within, or close to, the standard reference values. Our data suggest that environmental remediation is urgently needed to reduce the Pb exposure in infants and mothers from the environment in Kabwe in parallel with chelation therapy.
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Affiliation(s)
- Haruya Toyomaki
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan
| | - John Yabe
- The University of Zambia, School of Veterinary Medicine, Zambia; Department of Pathobiology, School of Veterinary Medicine, University of Namibia, Windhoek, Namibia
| | - Shouta M M Nakayama
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan.
| | - Yared B Yohannes
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan; Department of Chemistry, College of Natural and Computational Science, University of Gondar, Ethiopia
| | - Kaampwe Muzandu
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan; The University of Zambia, School of Veterinary Medicine, Zambia
| | - Tiza Mufune
- Ministry of Health, District Health Office, Kabwe, Zambia
| | - Hokuto Nakata
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan
| | - Yoshinori Ikenaka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan; Water Research Group, School of Environmental Sciences and Development, North-West University, South Africa; Translational Research Unit, Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan; One Health Research Center, Hokkaido University, Japan
| | - Takeshi Kuritani
- Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan
| | - Mitsuhiro Nakagawa
- Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan
| | - Kennedy Choongo
- The University of Zambia, School of Veterinary Medicine, Zambia; Fiji National University, College of Agriculture, Fisheries & Forestry, School of Animal and Veterinary Sciences, Koronivia Campus, Suva, Fiji
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Japan
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Adeel M, Shakoor N, Hussain T, Azeem I, Zhou P, Zhang P, Hao Y, Rinklebe J, Rui Y. Bio-interaction of nano and bulk lanthanum and ytterbium oxides in soil system: Biochemical, genetic, and histopathological effects on Eisenia fetida. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125574. [PMID: 33756203 DOI: 10.1016/j.jhazmat.2021.125574] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/22/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The massive application of rare earth elements (REEs) in electronic industries cause their inevitable release into the environment; however, its effects on soil biota remain largely unaddressed. We investigated the E. fetida detoxification potential of nano and bulk La2O3 and Yb2O3 and their potential impact on biochemical and genetic markers at 50, 100, 200, 500 and 1000 mg kg-1 concentration. We found that earthworms bioremediate 3-15% La2O3 and Yb2O3 contaminated soil at low and medium levels, while this potential was limited at higher levels. Nano and bulk La2O3 and Yb2O3 treatment induced neurotoxicity in earthworm by inhibiting acetylcholinesterase by 49-65% and 22-36% at 500 and 1000 mg kg-1, respectively. Nano La2O3 proved to be highly detrimental, mainly through oxidative stress and subsequent failure of antioxidant system. Nano La2O3 and Yb2O3 at 100 mg kg-1 significantly down-regulated the expression of annetocin mRNA in the parental and progeny earthworms by 50% and 20%, which is crucial for earthworm reproduction. Similarly, expression level of heat shock protein 70 (HSP70) and metallothionein was significantly upregulated in both generations at medium exposure level. Histological observations showed that nano REEs at 200 mg kg-1 induced drastic changes in the intestinal epithelium and typhlosole of E. fetida. To date, our results enhance the understanding of interaction between REEs and earthworms.
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Affiliation(s)
- Muhammad Adeel
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Noman Shakoor
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Tariq Hussain
- College of Veterinary Sciences, The University Agriculture Peshawar, 25000, Pakistan
| | - Imran Azeem
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Pingfan Zhou
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Peng Zhang
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Yi Hao
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water and Waste Management, Laboratory of Soil, and Groundwater Management, Pauluskirchstraße7, 42285 Wuppertal, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, Seoul 05006, Republic of Korea
| | - Yukui Rui
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
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Yao X, Qiao Z, Zhang F, Liu X, Du Q, Zhang J, Li X, Jiang X. Effects of a novel fungicide benzovindiflupyr in Eisenia fetida: Evaluation through different levels of biological organization. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116336. [PMID: 33370611 DOI: 10.1016/j.envpol.2020.116336] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Although benzovindiflupyr (BZF), which is a novel succinate dehydrogenase inhibitor fungicide, has considerable application potential worldwide, its extensive use is toxic to non-targeted soil organisms. Therefore, this study aimed to evaluate the acute and subchronic toxicity of BZF to earthworms (Eisenia fetida). The acute toxicity of BZF to adult and larval earthworms was measured, as indicated by the following LC50 values obtained after 14 days of exposure: 416 mg/kg for adult earthworms and 341 mg/kg for juveniles. Subchronic toxicity tests were conducted using only adult earthworms. The earthworms' weight gain was slower on days 14 and 28 after commencing the BZF T100 treatment (50 mg/kg of soil). Following 14 days of BZF exposure, enzymes and gene expressions associated with the mitochondrial respiratory chain and energy metabolism were activated to some extent, and the reactive oxygen species level and malondialdehyde content also increased. Antioxidant and detoxifying enzymes and metallothionein gene, Heat shock protein 70 gene associated with resistance to oxidative damage were also activated to varying degrees. Increased BZF concentrations corresponded to increased genotoxicity. Integrated biological response (IBR) values were calculated at the biochemical and molecular levels to show increased toxicity with increased BZF concentration. Although a series of biomarkers changes occurred after initiating BZF treatment, these changes were all likely to have been resisted by the earthworms' own antioxidant defense system and only showed phenotypic (weight-related) changes with treatments of 50 mg/kg. In conclusion, reasonable levels of BZF application may have little impact on earthworms. Our findings provide insights on the toxic effects of BZF on earthworms and may prove useful for risk assessments relating to BZF's impacts on soil ecosystems.
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Affiliation(s)
- Xiangfeng Yao
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China
| | - Zhihua Qiao
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China
| | - Fengwen Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences (CAAS), Qingdao, 266101, PR China
| | - Xiang Liu
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China
| | - Qingzhi Du
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China
| | - Jianye Zhang
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China
| | - Xiangdong Li
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China
| | - Xingyin Jiang
- College of Plant Protection Shandong Agricultural University, Tai'an, Shandong, 271018, PR China; Key Laboratory of Pesticide Toxicology & Application Technique, Tai'an, Shandong, 271018, PR China.
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9
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Bicho RC, Faustino AMR, Rêma A, Scott-Fordsmand JJ, Amorim MJB. Confirmatory assays for transient changes of omics in soil invertebrates - Copper materials in a multigenerational exposure. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123500. [PMID: 32712356 DOI: 10.1016/j.jhazmat.2020.123500] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Environmental risk assessment (ERA) based on effects caused by chronic and longer term exposure is highly relevant. Further, if mechanistic based approaches (e.g. omics) can be included, beyond apical endpoints (e.g. reproduction), the prediction of effects increases. For Cu NMs (and CuCl2) this has been studied in detail, covering multi-omics and apical effects using the soil standard species Enchytraeus crypticus. The intermediate level effects like cell/tissue and organ alterations represent a missing link. In the present study we aimed to: 1) perform long term exposure to Cu materials (full life cycle and multigeneration, 46 and 224 days) to collect samples; 2) perform histology and immunohistochemistry on collected samples at 12 time points and 17 treatments; 3) integrate all levels of biological organization onto an adverse outcome pathway (AOP) framework. CuO NMs and CuCl2 caused both similar and different stress response, either at molecular initiating events (MIE) or key events (KEs) of higher level of biological organization. Cell/Tissue and organ level, post-transcriptional and transcriptional mechanisms, through histone modifications and microRNA related protein, were similarly affected. While both Cu forms affected the Notch signalling pathway, CuCl2 also caused oxidative stress. Different mechanisms of DNA methylation (epigenetics) were activated by CuO NMs and CuCl2 at the MIE.
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Affiliation(s)
- Rita C Bicho
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - A M R Faustino
- Department of Pathology and Molecular Immunology, Biomedical Sciences Institute of Abel Salazar, University of Porto, 4050-313, Porto, Portugal
| | - A Rêma
- Department of Pathology and Molecular Immunology, Biomedical Sciences Institute of Abel Salazar, University of Porto, 4050-313, Porto, Portugal
| | - Janeck J Scott-Fordsmand
- Department of Bioscience, Aarhus University, Vejlsovej 25, PO BOX 314, DK-8600, Silkeborg, Denmark
| | - Mónica J B Amorim
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
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Jaskulak M, Rorat A, Kurianska-Piatek L, Hofman S, Bigaj J, Vandenbulcke F, Plytycz B. Species-specific Cd-detoxification mechanisms in lumbricid earthworms Eisenia andrei, Eisenia fetida and their hybrids. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111425. [PMID: 33068978 DOI: 10.1016/j.ecoenv.2020.111425] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/08/2020] [Accepted: 09/27/2020] [Indexed: 06/11/2023]
Abstract
Hermaphroditic lumbricid Eisenia sp. earthworms are ubiquitous and highly resistant to a variety of environmental stressors, including heavy metals. Among the progeny of laboratory mated inter-specific pairs of Eisenia fetida (Ea) and Eisenia andrei (Ef) there are fertile Ha hybrids derived from Ea ova fertilized by Ef spermatozoa and very rare sterile Hf hybrids from Ef ova fertilized by Ea spermatozoa. The aim of the first part of the experiment was to compare the life traits and whole body accumulation of cadmium in adult earthworms from genetically defined Ea, Ef and their hybrids (Ha) exposed for four weeks to commercial soil either unpolluted (control) or cadmium-spiked leading to moderate (M) or high (H) soil pollution (M = 425 and H = 835 mg kg-1 dry soil weight). Such exposure impaired cocoon production but not affected earthworm viability despite the massive Cd bioaccumulation in the whole earthworm bodies reaching at M and H groups 316-454, 203-338, 114-253, and 377-309 mg kg-1 dry body weights of Ea, Ef1, Ef2, and Ha, respectively, surprisingly reaching maximum accumulation quantities in hybrids. The second part of the experiment aimed to investigate cadmium-related defense mechanisms at transcriptomic level in coelomocytes non-invasively extruded from coelomic cavities of the new sets of Ea, Ef, Ha, and Hf earthworms exposed to Cd in microcosms for 0 days (control), 2 days, and 7 days (M = 425 mg kg-1). Expression level of stress-induced Cd-metallothionein (mt) and superoxide dismutase (sod) were gradually up-regulated, while the immune-connected lysenin (lys) was rapidly down-regulated; the expression of glutathione S-transferase (gst) and phytochelatin synthase (pcs) remained unaffected. Mt and sod gene up-regulation and lys gene down-regulation were especially pronounced in Ea-derived hybrids. In sum, capacity of cadmium bioaccumulation and detoxification mechanisms is more efficient in interspecific hybrids than in the pure Ea and Ef species.
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Affiliation(s)
- Marta Jaskulak
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France; Institute of Environmental Engineering, Czestochowa University of Technology, Czestochowa, Poland
| | - Agnieszka Rorat
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France.
| | | | - Sebastian Hofman
- Department of Comparative Anatomy, and Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Janusz Bigaj
- Department of Comparative Anatomy, and Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Franck Vandenbulcke
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France
| | - Barbara Plytycz
- Department of Comparative Anatomy, and Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
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11
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Hussain N, Chatterjee SK, Maiti TK, Goswami L, Das S, Deb U, Bhattacharya SS. Metal induced non-metallothionein protein in earthworm: A new pathway for cadmium detoxification in chloragogenous tissue. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123357. [PMID: 32634662 DOI: 10.1016/j.jhazmat.2020.123357] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/10/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Earthworms neutralize toxic metals by a small (∼13 kDa) cysteine rich metal binding protein, metallothionein (MT). Although the rate of metal accumulation and MT expression does not correlate well, the reason behind such inconsistency has not yet been deciphered. The present investigation clearly demonstrates that expression of some non-MT metal induced proteins is responsible for such incongruity. Applying selective protein isolation techniques in fluorescence tagged cadmium exposed (135 mg/kg) earthworms we were able to purify a 150 kDa metal induced protein (MIP) among others. After 60 days of exposure cadmium accumulation in earthworm intestines was significant. Immunofluorescence staining followed by confocal microscopy exhibited that MIP accumulates ingested cadmium in the intestinal region and eventually deposits the metal in the chloragogenous tissue. We determined the N-terminal sequence of 15 amino acid residues and after bioinformatics analysis, it was concluded that MIP is most probably a glutamic acid rich, novel cadmium binding protein. To further validate the binding mechanism, we conducted paper chromatography and continuous variation experiments which evidenced that cadmium readily binds to glutamic acid. The present finding is the first in-vivo evidence of a non-metallothionein cadmium binding protein induced in the intestines of earthworm exposed to a cadmium rich environment.
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Affiliation(s)
- Nazneen Hussain
- Soil and Agro Bio-engineering Lab, Department of Environmental Science, Tezpur University, Tezpur, 784028, India; Department of Bio-Sciences, Assam Don Bosco University, Sonapur, 782402, India
| | | | - Tushar Kanti Maiti
- Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, 121001, India
| | - Linee Goswami
- Department of Botany, Visva-Bharati, Santiniketan, 731235, India
| | - Subhasish Das
- Department of Environmental Sciences, Pachhunga University College (Mizoram University), Aizawl, 796001, Mizoram, India
| | - Utsab Deb
- Defense Research Laboratory (DRDO), Tezpur, Assam, India
| | - Satya Sundar Bhattacharya
- Soil and Agro Bio-engineering Lab, Department of Environmental Science, Tezpur University, Tezpur, 784028, India.
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12
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Rybak AV, Belykh ES, Maystrenko TA, Shadrin DM, Pylina YI, Chadin IF, Velegzhaninov IO. Genetic analysis in earthworm population from area contaminated with radionuclides and heavy metals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:137920. [PMID: 32213403 DOI: 10.1016/j.scitotenv.2020.137920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 06/10/2023]
Abstract
This study assessed the effects of environmental contamination by naturally occurring radionuclides and heavy metals on the genetic structure of a population of the earthworm Aporrectodea caliginosa. A. caliginosa were collected from four sites and characterized by amplified fragment length polymorphism (AFLP) analyses. No differences in genetic structure and diversity were found between sites that differed greatly in soil contamination levels of radionuclides and metals. However, when the genetic structure of the A. caliginosa population was analyzed without considering information about the sampling site, a complex intraspecific genetic structure was identified. At least three highly divergent lineages were found, in unequal proportions, of each genetically isolated group from each study site. No associations were found between the distribution of the detected genetic clusters and the geographical origin of the samples. Thus, no noticeable adaptive changes or signs of directional selection were detected, despite the long history of genotoxic waste disposal at the sampling site. These results suggest a combined effect of three factors on the genetic structure and diversity of A. caliginosa in soils: the complexity of the contaminant composition, the heterogeneous spatial distribution of the pollutants, and the complexity of the intraspecific genetic structures of A. caliginosa.
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Affiliation(s)
- Anna V Rybak
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Elena S Belykh
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Tatiana A Maystrenko
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia.
| | - Dmitry M Shadrin
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Yana I Pylina
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Ivan F Chadin
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia.
| | - Ilya O Velegzhaninov
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia; Polytechnical Institute of Vyatka State University, Kirov 610020, Russia.
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Bicho RC, Roelofs D, Mariën J, Scott-Fordsmand JJ, Amorim MJB. Epigenetic effects of (nano)materials in environmental species - Cu case study in Enchytraeus crypticus. ENVIRONMENT INTERNATIONAL 2020; 136:105447. [PMID: 31924578 DOI: 10.1016/j.envint.2019.105447] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/17/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
Chemical stressors can induce epigenomic changes, i.e., changes that are transferred to the next generation, even when the stressor is removed. Literature on chemical induced epigenetic effects in environmental species is scarce. We here provide the first results on epigenetic effects caused by nanomaterials with an environmental OECD standard soil model species Enchytraeus crypticus species. We assessed the epigenetic potential in terms of global DNA methylation, gene-specific methylation via bisulfite sequencing and MS-HRM (Methylation Sensitive - High Resolution Melting), and gene expression qPCR for genes involved in DNA methylation, histone modifications, non-coding RNA and stress response mechanisms). We have exposed E. crypticus in a multigenerational (MG) test design to Cu (copper oxide nanomaterials (CuO NMs) and copper salt (CuCl2)). To link possible epigenetic effects to population changes, we used exposure concentrations (ECx) that caused a 10% and 50% reduction in the reproductive output (10% and 50% are the standards for regulatory Risk Assessment), the organisms were exposed for five consecutive generations (F1-F5) plus two generations after transferring to clean media (F5-F7), 7 generations in a total of 224 days. Results showed that MG exposure to Cu increased global DNA methylation and corresponded with phenotypic effects (reproduction). Gene expression analyses showed changes in the epigenetic, stress and detoxification gene targets, depending on the generation and Cu form, also occurring in post-exposure generations, hence indicative of transgenerational effects. There were in general clear differences between organisms exposed to different Cu-forms, hence indicate nanoparticulate-specific effects.
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Affiliation(s)
- Rita C Bicho
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Dick Roelofs
- Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, the Netherlands
| | - Janine Mariën
- Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, the Netherlands
| | - Janeck J Scott-Fordsmand
- Department of Bioscience, Aarhus University, Vejlsovej 25, PO BOX 314, DK-8600 Silkeborg, Denmark
| | - Mónica J B Amorim
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
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Dutton MD, Vasiluk L, Ford F, Bellantino Perco M, Taylor SR, Lopez K, Bolger GT, Gopalapillai Y, Hale B. Towards an exposure narrative for metals and arsenic in historically contaminated Ni refinery soils: Relationships between speciation, bioavailability, and bioaccessibility. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 686:805-818. [PMID: 31195288 DOI: 10.1016/j.scitotenv.2019.05.164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/11/2019] [Accepted: 05/12/2019] [Indexed: 06/09/2023]
Abstract
Archived soils contaminated with Ni, Cu, Co, and As from legacy operations of a nickel refinery at Port Colborne, Ontario, Canada were speciated using mineral liberation analysis. Four Ni minerals were identified as fingerprint compounds of the historical refinery emissions. Cu and Co were present in solid solution in these minerals due to their presence in the refinery's feed. The highest concentrations of Ni, Cu, Co, and As in these soils were 18,553, 1915, 196, and 79mg/kg, respectively, these elevated contaminant concentrations attesting to the importance of incidental soil ingestion to the oral exposure pathway in Port Colborne. The in vitro gastric bioaccessibility (BAc) was determined for these contaminants, as was in vivo oral bioavailability (BAv), using a mass balance approach in male Sprague-Dawley rats. In spite of the elevated soil concentrations of Cu, the BAv of this physiologically important metal could not be distinguished from that in commercial rat chow, suggesting low potential for exposure. Co and As also had low apparent BAv (<2%). For Ni, baseline oral BAv of naturally sourced dietary Ni was found to be approximately 2%, as was the oral BAv of Ni from nickel sulfate hexahydrate. The mass balances of NiSO4·6H2O were fully accounted-for in urine and feces after a single gavage dose, indicating little to no organ incorporation from this highly soluble salt. Therefore, the urinary estimates of Ni BAv for these soils were assumed to represent true BAv despite variable fecal recoveries. The high Ni concentrations enabled BAc-BAv relationships to be developed for these contaminated soils. For absolute bioavailability (ABA) and relative bioavailability (RBA) the relationships were: ABA=0.0116(BAc)-0.0479 and RBA=0.5542(BAc)-2.2817. These findings will advance the development of robust exposure narratives for soil metal contamination in Port Colborne and elsewhere.
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Affiliation(s)
- Michael D Dutton
- BioProcess Assist (BPA) Ltd., 8579 Appleby Line, Campbellville, Ontario L0P 1B0, Canada.
| | - Luba Vasiluk
- School of Environmental Sciences, University of Guelph, 50 Stone Road E., Guelph, Ontario N1G 2W1, Canada
| | - Frederick Ford
- Vale Canada Limited, Technology Development, 2060 Flavelle Boulevard, Sheridan Park, Mississauga, Ontario L5K 1Z9, Canada
| | - Maria Bellantino Perco
- Vale Canada Limited, Port Colborne Refinery, 187 Davis Street, Port Colborne, Ontario L3K 5W2, Canada
| | - Simon R Taylor
- Departments of Chemistry and Toxicology, Nucro-technics, 2000 Ellesmere Road Unit #16, Scarborough, Ontario M1H 2W4, Canada
| | - Karen Lopez
- Departments of Chemistry and Toxicology, Nucro-technics, 2000 Ellesmere Road Unit #16, Scarborough, Ontario M1H 2W4, Canada
| | - Gordon T Bolger
- Departments of Chemistry and Toxicology, Nucro-technics, 2000 Ellesmere Road Unit #16, Scarborough, Ontario M1H 2W4, Canada
| | - Yamini Gopalapillai
- Environment and Climate Change Canada, Canada Centre for Inland Waters, 867 Lakeshore Road, Burlington, Ontario L7S 1A1, Canada
| | - Beverly Hale
- School of Environmental Sciences, University of Guelph, 50 Stone Road E., Guelph, Ontario N1G 2W1, Canada
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15
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Paul S, Heckmann LH, Sørensen JG, Holmstrup M, Arumugaperumal A, Sivasubramaniam S. Transcriptome sequencing, de novo assembly and annotation of the freeze tolerant earthworm, Dendrobaena octaedra. GENE REPORTS 2018. [DOI: 10.1016/j.genrep.2018.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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16
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Šrut M, Drechsel V, Höckner M. Low levels of Cd induce persisting epigenetic modifications and acclimation mechanisms in the earthworm Lumbricus terrestris. PLoS One 2017; 12:e0176047. [PMID: 28426746 PMCID: PMC5398608 DOI: 10.1371/journal.pone.0176047] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 04/04/2017] [Indexed: 12/17/2022] Open
Abstract
Toxic effects of cadmium (Cd), a common soil pollutant, are still not very well understood, particularly in regard to its epigenetic impact. Therefore, the aim of this study was to assess DNA methylation changes and their persistence in the earthworm Lumbricus terrestris upon chronic low dose Cd exposure using methylation sensitive amplification polymorphism (MSAP). Moreover, the biomarker response and fitness of the earthworms, as well as the expression of detoxification-related genes (metallothionein (MT) and phytochelatin synthase (PCS)) was evaluated. Low levels of Cd caused an increase in genome-wide DNA methylation, which remained partly modified, even after several months of recovery in unpolluted soil. Increased cellular stress seemed to decrease after two weeks of exposure whereas fitness parameters remained unaffected by Cd, probably as a result from the activation of detoxification mechanisms like the expression of MTs. Interestingly, even though the level of Cd exposure was very low, MT expression levels indicate the development of acclimation mechanisms. Taken together, this study demonstrates that acclimation, as well as epigenetic modifications can occur already in moderately polluted environments. In addition, these effects can have long-lasting impacts on key species of soil invertebrates and might persist long after the actual heavy metal challenge has passed.
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Affiliation(s)
- Maja Šrut
- Department of Zoology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, Zagreb, Croatia
| | - Victoria Drechsel
- Department of Ecophysiology, Institute of Zoology, University of Innsbruck, Center for Molecular Biosciences, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Martina Höckner
- Department of Ecophysiology, Institute of Zoology, University of Innsbruck, Center for Molecular Biosciences, Technikerstr. 25, A-6020 Innsbruck, Austria
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17
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Variation in gene expression within clones of the earthworm Dendrobaena octaedra. PLoS One 2017; 12:e0174960. [PMID: 28384196 PMCID: PMC5383104 DOI: 10.1371/journal.pone.0174960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 03/19/2017] [Indexed: 12/23/2022] Open
Abstract
Gene expression is highly plastic, which can help organisms to both acclimate and adapt to changing environments. Possible variation in gene expression among individuals with the same genotype (among clones) is not widely considered, even though it could impact the results of studies that focus on gene expression phenotypes, for example studies using clonal lines. We examined the extent of within and between clone variation in gene expression in the earthworm Dendrobaena octaedra, which reproduces through apomictic parthenogenesis. Five microsatellite markers were developed and used to confirm that offspring are genetic clones of their parent. After that, expression of 12 genes was measured from five individuals each from six clonal lines after exposure to copper contaminated soil. Variation in gene expression was higher over all genotypes than within genotypes, as initially assumed. A subset of the genes was also examined in the offspring of exposed individuals in two of the clonal lines. In this case, variation in gene expression within genotypes was as high as that observed over all genotypes. One gene in particular (chymotrypsin inhibitor) also showed significant differences in the expression levels among genetically identical individuals. Gene expression can vary considerably, and the extent of variation may depend on the genotypes and genes studied. Ensuring a large sample, with many different genotypes, is critical in studies comparing gene expression phenotypes. Researchers should be especially cautious inferring gene expression phenotypes when using only a single clonal or inbred line, since the results might be specific to only certain genotypes.
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18
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Mirmonsef H, Hornum HD, Jensen J, Holmstrup M. Effects of an aged copper contamination on distribution of earthworms, reproduction and cocoon hatchability. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 135:267-275. [PMID: 27750094 DOI: 10.1016/j.ecoenv.2016.10.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 10/05/2016] [Accepted: 10/07/2016] [Indexed: 06/06/2023]
Abstract
Contaminated soil is a problem throughout the industrialized world, and a significant proportion of these sites are polluted with heavy metals such as copper. Ecological risk assessment of contaminated sites requires ecotoxicological studies with spiked soils as well as in-situ ecological observations. Here, we report laboratory and field assessment of copper toxicity for earthworms at a Danish site (Hygum) exclusively contaminated with an increasing gradient in copper from background to highly toxic levels (>1000mgkg-1 dry soil). More specifically, we report effects on field populations, body contents of copper, hatching of earthworm cocoons and reproduction of the common species Aporrectodea tuberculata. Abundance of earthworms and cocoons decreased significantly from about 400-150m-2 along the gradient as the soil copper concentration increased from ca. 50 to ca. 1000mgkg-1. At lower concentrations, the population was dominated by endogeic species, whereas at high concentrations the population was dominated by epigeic species. At high copper contents the internal concentration of copper was in the range 100-160mgkg-1 dry tissue. Despite the high internal copper contents, hatchability of field collected cocoons was not impaired in any species. The EC50 reproduction value of A. tuberculata was about 220mg copper kg-1 dry soil in the first two exposure periods, but nearly doubled in the third period suggesting that an acclimation response had occurred. Also in the laboratory reproduction test, cocoon hatchability was not reduced, but rather slightly stimulated by copper. Based on these results we discuss the possibility that acute exposure in laboratory experiments is more detrimental than exposure in a field situation, perhaps because increased tolerance may be acquired through natural selection and genetic adaptation through increased use of defense mechanisms such as metallothioneins. Further, we discuss that the rather high tissue copper level of earthworms from the Hygum site may have smaller effects in these free-ranging worms than it would have in acute-exposure laboratory tests because the copper is more efficiently sequestered and detoxified in the field situation where populations have been exposed for many generations.
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Affiliation(s)
- Hassan Mirmonsef
- Aarhus University, Department of Bioscience, Section for Soil Fauna Ecology and Ecotoxicology, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - Hanne D Hornum
- Aarhus University, Department of Bioscience, Section for Soil Fauna Ecology and Ecotoxicology, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - John Jensen
- Aarhus University, Department of Bioscience, Section for Soil Fauna Ecology and Ecotoxicology, Vejlsøvej 25, 8600 Silkeborg, Denmark
| | - Martin Holmstrup
- Aarhus University, Department of Bioscience, Section for Soil Fauna Ecology and Ecotoxicology, Vejlsøvej 25, 8600 Silkeborg, Denmark.
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19
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Nirola R, Megharaj M, Venkateswarlu K, Aryal R, Correll R, Naidu R. Assessment of metal toxicity and bioavailability in metallophyte leaf litters and metalliferous soils using Eisenia fetida in a microcosm study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 129:264-272. [PMID: 27057994 DOI: 10.1016/j.ecoenv.2016.03.034] [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: 12/28/2015] [Revised: 03/26/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
The leaf litters of tree species, Acacia pycnantha (Ap) and Eucalyptus camaldulensis (Ec), predominantly growing at an abandoned copper (Cu) mine and mine soils including controls, were assessed for determining the metal toxicity and bioavailability using earthworm species Eisenia fetida, in a microcosm. Significant reduction in body weight as well as mortality were observed when the worms were introduced into mine soil or its combination with mine Ap litter. Virtually, there were no juveniles when the worms were fed on substratum that contained mine soil or mine leaf litter. The extent of bioaccumulation was dependent on water-soluble fraction of a metal in soil. The accumulation of cadmium, lead and copper in worm tissue was significantly more in treatments that received mine soil with or without mine leaf litter. However, the tissue concentration of zinc did not differ much in earthworms irrespective of its exposure to control or contaminated samples. Mine leaf litter from Ec, a known Cu hyperaccumulator, was more hospitable to earthworm survival and juvenile than that of Ap litter. Validation of the data on bioaccumulation of metals indicated that the mine leaf litter significantly contributed to metal bioavailability. However, it was primarily the metal concentration in mine soil that was responsible for earthworm toxicity and bioavailability. Our data also indicate that detrivores like earthworm is greatly responsible for heavy metal transfer from mines into the ecosystem.
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Affiliation(s)
- Ramkrishna Nirola
- Future Industries Institute, Division of Information Technology Engineering and the Environment, University of South Australia, SA 5095 Australia.
| | - Mallavarapu Megharaj
- Global Centre for Environmental Research (GCER), University of Newcastle, ATC Building, Callaghan, Newcastle, NSW 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly Professor of Microbiology & Dean, Faculty of Life Sciences, Sri Krishnadevaraya University, Anantapur 515055, India
| | - Rupak Aryal
- School of Natural and Built Environments, Division of Information Technology Engineering and the Environment, University of South Australia, SA 5095, Australia
| | - Ray Correll
- Future Industries Institute, Division of Information Technology Engineering and the Environment, University of South Australia, SA 5095 Australia
| | - Ravi Naidu
- Global Centre for Environmental Research (GCER), University of Newcastle, ATC Building, Callaghan, Newcastle, NSW 2308, Australia
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Earthworm Lumbricus rubellus MT-2: Metal Binding and Protein Folding of a True Cadmium-MT. Int J Mol Sci 2016; 17:ijms17010065. [PMID: 26742040 PMCID: PMC4730310 DOI: 10.3390/ijms17010065] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 12/18/2015] [Accepted: 12/24/2015] [Indexed: 01/03/2023] Open
Abstract
Earthworms express, as most animals, metallothioneins (MTs)—small, cysteine-rich proteins that bind d10 metal ions (Zn(II), Cd(II), or Cu(I)) in clusters. Three MT homologues are known for Lumbricus rubellus, the common red earthworm, one of which, wMT-2, is strongly induced by exposure of worms to cadmium. This study concerns composition, metal binding affinity and metal-dependent protein folding of wMT-2 expressed recombinantly and purified in the presence of Cd(II) and Zn(II). Crucially, whilst a single Cd7wMT-2 species was isolated from wMT-2-expressing E. coli cultures supplemented with Cd(II), expressions in the presence of Zn(II) yielded mixtures. The average affinities of wMT-2 determined for either Cd(II) or Zn(II) are both within normal ranges for MTs; hence, differential behaviour cannot be explained on the basis of overall affinity. Therefore, the protein folding properties of Cd- and Zn-wMT-2 were compared by 1H NMR spectroscopy. This comparison revealed that the protein fold is better defined in the presence of cadmium than in the presence of zinc. These differences in folding and dynamics may be at the root of the differential behaviour of the cadmium- and zinc-bound protein in vitro, and may ultimately also help in distinguishing zinc and cadmium in the earthworm in vivo.
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