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Bio-Mediated Method for Immobilizing Copper Tailings Sand Contaminated with Multiple Heavy Metals. CRYSTALS 2022. [DOI: 10.3390/cryst12040522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microbial induced carbonate precipitation (MICP) is a natural bio-mediated process that has been investigated for soil stabilization and heavy metal immobilization in soil and groundwater. This study analyzed the effect and mechanism of MICP for the solidification/stabilization of tailings sand with multi-heavy metals. When the concentration of cementation solution (CS) is 1.0 mol/L and the optical density(OD600) is 1.6, the unconfined compressive strength of tailings sand treated by MICP is the largest, and the solidification efficiency of heavy metals in tailings sand is also the highest. The macroscopic and microscopic observations reveal that the mechanism of MICP solidification of tailings is bacterial outer oxide, hydroxide, alkaline carbonate, and carbonate precipitation.
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Srikanth K, Nutalapati V. Copper ferrite nanoparticles induced cytotoxicity and oxidative stress in Channel catfish ovary cells. CHEMOSPHERE 2022; 287:132166. [PMID: 34826900 DOI: 10.1016/j.chemosphere.2021.132166] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/23/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Nanomaterials are the sixth most emerging contaminants that are entering into aquatic habitat posing a risk to the inhabiting organisms. Nanoparticles of copper ferrite have been extensively used in biomedical applications. However, very limited studies are available on the cytotoxicity evaluation of copper ferrite nanoparticles (CuFe2O4NPs) on different cell lines. The current work investigates on the cytotoxicity, oxidative stress and morphological variations triggered by CuFe2O4NPs in Channel catfish ovary (CCO) cells using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT), neutral red uptake (NRU), lipid peroxidation (LPO), catalase (CAT), reduced glutathione (GSH), glutathione sulfotransferase (GST) and glutathione peroxidase (GPX) assays after 24 h of treatment. Dose dependent decline in cell survival was noticed in MTT and NRU assays. A significant increase in LPO, GST and GPX was observed in CCO cells exposed to CuFe2O4NPs after 24 h of treatment. However, the CAT and GSH levels in CCO cells exposed to CuFe2O4NPs decreased significantly after 24 h. The CCO cells exposed to 10 μg/mL concentration of CuFe2O4NPs for 24 h showed remarkable changes in their morphology. Further, the study also describes the detailed mechanism of toxicity of CuFe2O4NPs in other model cell lines to probe the risk of inhabiting organisms.
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Affiliation(s)
- Koigoora Srikanth
- Centre for Environment & Marine Studies (CESAM), Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal; Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to Be University), Vadlamudi, 522213, Guntur, Andhra Pradesh, India.
| | - Venkatramaiah Nutalapati
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, 603203, Chennai, TN, India.
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Chun SJ, Kim YJ, Cui Y, Nam KH. Ecological network analysis reveals distinctive microbial modules associated with heavy metal contamination of abandoned mine soils in Korea. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 289:117851. [PMID: 34358869 DOI: 10.1016/j.envpol.2021.117851] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 07/13/2021] [Accepted: 07/25/2021] [Indexed: 05/26/2023]
Abstract
Heavy metal pollution in soil around abandoned mine sites is one of the most critical environmental issues worldwide. Soil microbes form complex communities and perform ecological functions individually or in cooperation with other organisms to adapt to harsh environments. In this study, we investigated the distribution patterns of bacterial and fungal communities in non-contaminated and heavy metal-contaminated soil of the abandoned Samkwang mine in Korea to explore microbial interaction mechanisms and their modular structures. As expected, the bacterial and fungal community structures showed large differences depending on the degree of heavy metal contamination. The microbial network was divided into three modules based on the levels of heavy metal pollution: heavy metal-tolerant (HM-Tol), heavy metal-mid-tolerant (HM-mTol), and heavy metal-sensitive (HM-Sens) modules. Taxonomically, microbes assigned to Vicinamibacterales, Pedosphaeraceae, Nitrosomonadaceae, and Gemmatimonadales were the major groups constituting the HM-Tol module. Among the detected heavy metals (As, Pb, Cd, Cu, and Zn), copper concentrations played a key role in the formation of the HM-Tol module. In addition, filamentous fungi (Fusarium and Mortierella) showed potential interactions with bacteria (Nitrosomonadaceae) that could contribute to module stability in heavy metal-contaminated areas. Overall, heavy metal contamination was accompanied by distinct microbial communities, which could participate in the bioremediation of heavy metals. Analysis of the microbial interactions among bacteria and fungi in the presence of heavy metals could provide fundamental information for developing bioremediation mechanisms for the recovery of heavy metal-contaminated soil.
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Affiliation(s)
- Seong-Jun Chun
- LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea
| | - Young-Joong Kim
- LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea
| | - Yingshun Cui
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Kyong-Hee Nam
- LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea.
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Dutta M, Islam N, Rabha S, Narzary B, Bordoloi M, Saikia D, Silva LFO, Saikia BK. Acid mine drainage in an Indian high-sulfur coal mining area: Cytotoxicity assay and remediation study. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121851. [PMID: 31879117 DOI: 10.1016/j.jhazmat.2019.121851] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 12/06/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
Opencast mining causes significant environmental concern due to acid mine drainage (AMD) caused by the oxidation of pyrites and other sulfur-bearing minerals. The present study intends to determine the seasonal variability of AMD in the affected area of the Ledo opencast mining, the cytotoxicity of the AMD, and the AMD remediation process. The physicochemical properties of the collected samples were analyzed by using laboratory-based methods and sophisticated instrumental tools. The cytotoxicity study of AMD water was performed by using different cell lines such as normal rat muscle and human carcinoma cells. The study demonstrates that the mine water samples have high conductivity (1.30-2.49 ms cm-1) with high total dissolved solids (1068-1339 ppm) which can change the ionic composition of water. The concentration level of trace elements are also found to be higher than the permissible limit during monsoon season. A simple laboratory-based remediation process of AMD has been carried out in the current study by using size segregated pulverized limestone and the process reveals the decrease in elemental concentrations of AMD water. This study will be useful to develop a remediation technique to minimize the concentration levels of hazardous elements and ions in the AMD water.
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Affiliation(s)
- Madhulika Dutta
- School of Applied Sciences, Department of Chemistry, University of Science & Technology, Meghalaya, India; Polymer Petroleum and Coal Chemistry Group, Materials Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, 785006, India; Department of Chemistry, CNB College, Bokakhat, 785612, India
| | - Nazrul Islam
- Polymer Petroleum and Coal Chemistry Group, Materials Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, 785006, India
| | - Shahadev Rabha
- Polymer Petroleum and Coal Chemistry Group, Materials Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, 785006, India
| | - Bardwi Narzary
- Natural Product Chemistry Group (CSTD), CSIR-North East Institute of Science and Technology, Jorhat, 785006, India
| | - Manobjyoti Bordoloi
- Natural Product Chemistry Group (CSTD), CSIR-North East Institute of Science and Technology, Jorhat, 785006, India
| | - Durlov Saikia
- School of Applied Sciences, Department of Chemistry, University of Science & Technology, Meghalaya, India
| | - Luis F O Silva
- Departmentof Civil and Environmental, Universidad de la Costa, Calle 58 #55-66, 080002, Barranquilla, Atlántico, Colombia
| | - Binoy K Saikia
- Polymer Petroleum and Coal Chemistry Group, Materials Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, 785006, India.
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Žegura B, Filipič M. The application of the Comet assay in fish cell lines. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 842:72-84. [DOI: 10.1016/j.mrgentox.2019.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 12/28/2022]
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Selenium, Sulphur, Trace Metal, and BTEX Levels in Soil, Water, and Lettuce from the Croatian Raša Bay Contaminated by Superhigh-Organic-Sulphur Coal. GEOSCIENCES 2018. [DOI: 10.3390/geosciences8110408] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper elaborates soil, water, and lettuce contamination status with respect to selenium, sulphur, trace metals, and BTEX (benzene, toluene, ethylbenzene, and xylenes) in a coal-based area (Raša Bay, Adriatic Sea, Croatia). A local coal-fired power plant polluted soil with S, Se, Cd, and PAHs due to the combustion of domestic superhigh-organic-sulphur coal. The locality is dotted with waste from coal mining/separation, coal combustion, former metal factories, untreated municipal and coal mine effluents, along with various harbour activities, which contribute to environmental contamination. The methodology involved ICP-MS and GC-MS for the measurement of trace elements and BTEX, respectively, while soil sulphur was determined with Eschka’s mixture. The max values of the analysed trace elements in soil (mg/kg) are reported: Hg 1.14, Cd 3.29, V 624, Se 10.3, Pb 872, Cr 1860, Zn 6580, Cu 1850, and U 25.2. According to ecological indices, these values fall into the category of an extremely high level of soil pollution. Elevated total Se values in surface water are ascribed to leaching of seleniferous coal, ash, and coal-polluted soil. Levels of BTEX in water samples were very low (0–0.83 µg/L). The data provide basic information on the inorganic and organic contamination status of the Raša Bay area.
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Medunić G, Ahel M, Mihalić IB, Srček VG, Kopjar N, Fiket Ž, Bituh T, Mikac I. Toxic airborne S, PAH, and trace element legacy of the superhigh-organic-sulphur Raša coal combustion: Cytotoxicity and genotoxicity assessment of soil and ash. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 566-567:306-319. [PMID: 27232961 DOI: 10.1016/j.scitotenv.2016.05.096] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/13/2016] [Accepted: 05/14/2016] [Indexed: 06/05/2023]
Abstract
This paper presents the levels of sulphur, polycyclic aromatic hydrocarbons (PAHs), and potentially toxic trace elements in soils surrounding the Plomin coal-fired power plant (Croatia). It used domestic superhigh-organic-sulphur Raša coal from 1970 until 2000. Raša coal was characterised by exceptionally high values of S, up to 14%, making the downwind southwest (SW) area surrounding the power plant a significant hotspot. The analytical results show that the SW soil locations are severely polluted with S (up to 4%), and PAHs (up to 13,535ng/g), while moderately with Se (up to 6.8mg/kg), and Cd (up to 4.7mg/kg). The composition and distribution pattern of PAHs in the polluted soils indicate that their main source could be airborne unburnt coal particles. The atmospheric dispersion processes of SO2 and ash particles have influenced the composition and distribution patterns of sulphur and potentially toxic trace elements in studied soils, respectively. A possible adverse impact of analysed soil on the local karstic environment was evaluated by cytotoxic and genotoxic methods. The cytotoxicity effects of soil and ash water extracts on the channel catfish ovary (CCO) cell line were found to be statistically significant in the case of the most polluted soil and ash samples. However, the primary DNA-damaging potential of the most polluted soil samples on the CCO cells was found to be within acceptable boundaries.
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Affiliation(s)
- Gordana Medunić
- University of Zagreb, Faculty of Science, Department of Geology, Horvatovac 95, Zagreb, Croatia.
| | - Marijan Ahel
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Zagreb, Croatia
| | | | - Višnja Gaurina Srček
- University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, Croatia
| | - Nevenka Kopjar
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Željka Fiket
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Zagreb, Croatia
| | - Tomislav Bituh
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Iva Mikac
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Zagreb, Croatia
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Sogbanmu TO, Nagy E, Phillips DH, Arlt VM, Otitoloju AA, Bury NR. Lagos lagoon sediment organic extracts and polycyclic aromatic hydrocarbons induce embryotoxic, teratogenic and genotoxic effects in Danio rerio (zebrafish) embryos. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:14489-501. [PMID: 27068906 PMCID: PMC4943991 DOI: 10.1007/s11356-016-6490-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 03/16/2016] [Indexed: 05/04/2023]
Abstract
An expansion of anthropogenic activity around Lagos lagoon, Nigeria, has raised concerns over increasing contaminants entering the lagoon's ecosystem. The embryotoxicity, teratogenicity and genotoxicity of sediment organic extracts from four sampling zones around Lagos lagoon, Ilaje, Iddo, Atlas Cove and Apapa, as well as the dominant polycyclic aromatic hydrocarbons (PAHs) identified in water measured during the wet season (naphthalene, phenanthrene, pyrene, benzo[a]pyrene and a mixture of these), were assessed with Danio rerio embryos. Embryos were exposed to varying concentrations of toxicants from 0-72 h post-fertilization (hpf). Embryotoxicity at 72 hpf showed a dose-dependent increase in mortality upon exposure to extracts from all zones, except Atlas Cove. Similarly, higher levels of teratogenic effects, such as increased oedema, and haemorrhage and developmental abnormalities resulted from exposure to extracts from Ilaje, Iddo and Apapa zones. Treatment with single PAHs revealed that significant levels of detrimental effects were obtained only for phenanthrene. The modified comet assay revealed that the oxidative damage to DNA was generally low (<12 %) overall for all sediment extracts, but was significantly elevated with Ilaje and Iddo sediment extracts when compared with solvent controls. Oxidative damage was observed with the single PAHs, phenanthrene and benzo[a]pyrene, as well as with the PAH mixture. This study highlights that Lagos lagoon sediment extracts have teratogenic, embryotoxic and genotoxic properties, which are likely due to the high molecular weight PAHs present in the extracts, some of which are known or are suspected human carcinogens.
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Affiliation(s)
- Temitope O Sogbanmu
- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017, Lagos, Nigeria
| | - Eszter Nagy
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - David H Phillips
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Volker M Arlt
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Adebayo A Otitoloju
- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017, Lagos, Nigeria
| | - Nic R Bury
- Division of Diabetes and Nutritional Sciences, Faculty of Life Sciences and Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK.
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de Lapuente J, Lourenço J, Mendo SA, Borràs M, Martins MG, Costa PM, Pacheco M. The Comet Assay and its applications in the field of ecotoxicology: a mature tool that continues to expand its perspectives. Front Genet 2015; 6:180. [PMID: 26089833 PMCID: PMC4454841 DOI: 10.3389/fgene.2015.00180] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 04/28/2015] [Indexed: 01/20/2023] Open
Abstract
Since Singh and colleagues, in 1988, launched to the scientific community the alkaline Single Cell Gel Electrophoresis (SCGE) protocol, or Comet Assay, its uses and applications has been increasing. The thematic areas of its current employment in the evaluation of genetic toxicity are vast, either in vitro or in vivo, both in the laboratory and in the environment, terrestrial or aquatic. It has been applied to a wide range of experimental models: bacteria, fungi, cells culture, arthropods, fishes, amphibians, reptiles, mammals, and humans. This document is intended to be a comprehensive review of what has been published to date on the field of ecotoxicology, aiming at the following main aspects: (i) to show the most relevant experimental models used as bioindicators both in the laboratory and in the field. Fishes are clearly the most adopted group, reflecting their popularity as bioindicator models, as well as a primary concern over the aquatic environment health. Amphibians are among the most sensitive organisms to environmental changes, mainly due to an early aquatic-dependent development stage and a highly permeable skin. Moreover, in the terrestrial approach, earthworms, plants or mammalians are excellent organisms to be used as experimental models for genotoxic evaluation of pollutants, complex mix of pollutants and chemicals, in both laboratory and natural environment. (ii) To review the development and modifications of the protocols used and the cell types (or tissues) used. The most recent developments concern the adoption of the enzyme linked assay (digestion with lesion-specific repair endonucleases) and prediction of the ability to repair of oxidative DNA damage, which is becoming a widespread approach, albeit challenging. For practical/technical reasons, blood is the most common choice but tissues/cells like gills, sperm cells, early larval stages, coelomocytes, liver or kidney have been also used. (iii) To highlight correlations with other biomarkers. (iv) To build a constructive criticism and summarize the needs for protocol improvements for future test applications within the field of ecotoxicology. The Comet Assay is still developing and its potential is yet underexploited in experimental models, mesocosmos or natural ecosystems.
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Affiliation(s)
- Joaquín de Lapuente
- Unit of Experimental Toxicology and Ecotoxicology (UTOX-CERETOX), Barcelona Science ParkBarcelona, Spain
| | - Joana Lourenço
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago. Aveiro, Portugal
| | - Sónia A. Mendo
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago. Aveiro, Portugal
| | - Miquel Borràs
- Unit of Experimental Toxicology and Ecotoxicology (UTOX-CERETOX), Barcelona Science ParkBarcelona, Spain
| | - Marta G. Martins
- Departamento de Ciências e Engenharia do Ambiente, MARE – Marine and Environmental Sciences Centre, Faculdade de Ciências e Tecnologia da Universidade Nova de LisboaCaparica, Portugal
| | - Pedro M. Costa
- Departamento de Ciências e Engenharia do Ambiente, MARE – Marine and Environmental Sciences Centre, Faculdade de Ciências e Tecnologia da Universidade Nova de LisboaCaparica, Portugal
| | - Mário Pacheco
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago. Aveiro, Portugal
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Bubalo MC, Radošević K, Srček VG, Das RN, Popelier P, Roy K. Cytotoxicity towards CCO cells of imidazolium ionic liquids with functionalized side chains: preliminary QSTR modeling using regression and classification based approaches. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 112:22-28. [PMID: 25463849 DOI: 10.1016/j.ecoenv.2014.10.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/13/2014] [Accepted: 10/20/2014] [Indexed: 06/04/2023]
Abstract
Within this work we evaluated the cytotoxicity towards the Channel Catfish Ovary (CCO) cell line of some imidazolium-based ionic liquids containing different functionalized and unsaturated side chains. The toxic effects were measured by the reduction of the WST-1 dye after 72 h exposure resulting in dose- and structure-dependent toxicities. The obtained data on cytotoxic effects of 14 different imidazolium ionic liquids in CCO cells, expressed as EC50 values, were used in a preliminary quantitative structure-toxicity relationship (QSTR) study employing regression- and classification-based approaches. The toxicity of ILs towards CCO was chiefly related to the shape and hydrophobicity parameters of cations. A significant influence of the quantum topological molecular similarity descriptor ellipticity (ε) of the imine bond was also observed.
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Affiliation(s)
- Marina Cvjetko Bubalo
- Laboratory for Cell Technology, Application and Biotransformations, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
| | - Kristina Radošević
- Laboratory for Cell Technology, Application and Biotransformations, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
| | - Višnja Gaurina Srček
- Laboratory for Cell Technology, Application and Biotransformations, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
| | - Rudra Narayan Das
- Drug Theoretics and Cheminformatics Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Paul Popelier
- Manchester Institute of Biotechnology, University of Manchester, Manchester M1 7DN, United Kingdom
| | - Kunal Roy
- Drug Theoretics and Cheminformatics Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India; Manchester Institute of Biotechnology, University of Manchester, Manchester M1 7DN, United Kingdom.
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Amaeze NH, Schnell S, Sozeri O, Otitoloju AA, Egonmwan RI, Arlt VM, Bury NR. Cytotoxic and genotoxic responses of the RTgill-W1 fish cells in combination with the yeast oestrogen screen to determine the sediment quality of Lagos lagoon, Nigeria. Mutagenesis 2015; 30:117-27. [PMID: 25527734 DOI: 10.1093/mutage/geu032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Economic advancements in developing countries have seen an increase in urbanisation and industrialisation with a rise in the levels of discharge of effluents and municipal waste into aquatic ecosystems. Unfortunately, aquatic environmental regulations in these countries are often rudimentary and the development of environmental monitoring programmes will help identify ecological risks. As an example, the current study assesses the pollution status of 11 sampling sites in Lagos lagoon, Nigeria. The organic solvent sediment extracts were assessed for cytotoxicity and genotoxicity in rainbow trout gill-W1 cells. The induction of oestrogenic activities using the yeast oestrogen screen was also determined. The sediments were analysed for polycyclic aromatic hydrocarbons (PAHs) and other contaminants (polychlorinated biphenyls, organochlorine and organophosphate pesticides). Only sediments from three sites were cytotoxic at both 25 and 12.5mg eQsed/ml using the Alamar Blue cell viability assay. The alkaline Comet assay showed that all sites caused significant DNA damage at 7 mg eQsed/ml; the extent of the damage was site specific. The measure of oxidative damage to DNA via the formamidopyrimidine DNA-glycosylase-modified Comet assay revealed similar results. Toxicity to yeast cells was observed in extracts from six sites; of the remaining sites, only two exhibited oestrogenic activity. There was no strong consistent relationship between sediment PAH concentrations and the cell toxicity endpoints. The dynamic nature of Lagos lagoon with its tides and freshwater inputs are suggested as factors that make it difficult to link the sources of pollution observed at each site with PAH levels and toxic endpoints. The study has demonstrated that the Comet assay is a sensitive endpoint to identify sediments that possess genotoxic contaminants, and this in vitro bioassay has the potential to be incorporated into an environmental monitoring framework for Lagos lagoon.
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Affiliation(s)
- Nnamdi H Amaeze
- Ecotoxicology Laboratory, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017 Lagos, Nigeria, Nigeria, Division of Diabetes and Nutritional Sciences and Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
| | | | - Osman Sozeri
- Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
| | - Adebayo A Otitoloju
- Ecotoxicology Laboratory, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017 Lagos, Nigeria, Nigeria, Division of Diabetes and Nutritional Sciences and Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
| | - Rosemary I Egonmwan
- Ecotoxicology Laboratory, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017 Lagos, Nigeria, Nigeria, Division of Diabetes and Nutritional Sciences and Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
| | - Volker M Arlt
- Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK
| | - Nic R Bury
- Division of Diabetes and Nutritional Sciences and
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