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Kalter V, de Jourdan B, Chorfa N, Wang F, Schneider D, Passow U. Oil uptake via marine snow: Effects on blue mussels (Mytilus sp.). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 274:107047. [PMID: 39153253 DOI: 10.1016/j.aquatox.2024.107047] [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: 05/04/2024] [Revised: 08/07/2024] [Accepted: 08/09/2024] [Indexed: 08/19/2024]
Abstract
Accidental oil spills into the ocean can lead to downward transport and settling of oil onto the seafloor as part of marine snow, as seen during the Deepwater Horizon incident in 2010 in the Gulf of Mexico. The arctic and subarctic regions may favor conditions leading to this benthic oil deposition, prompting questions about the potential impacts on benthic communities. This study investigated the effects of oil-contaminated marine snow uptake on the blue mussel (Mytilus sp.). We exposed mussels for four days to 1) oil-contaminated marine snow (MOS treatment), or to 2) chemically-enhanced water-accommodated fraction (CEWAF) of oil plus unaggregated food particles (CEWAF treatment). Both oil treatments received the same nominal concentration of oil and food. Two controls were included: 1) Clean seawater plus unaggregated food (agg-free control) and 2) clean seawater plus marine snow (marine snow control). After the exposure, mussels were allowed to recover for ten days under clean, running seawater. Samples were taken right before and after the exposure period, and after the recovery phase for the following endpoints: distribution (partitioning) of oil compounds between seawater and MOS, and between seawater and mussel tissue; DNA damage (assessed via the comet assay); clearance rate; and condition index [tissue dry weight (g) divided by shell length (mm)]. Some discernable patterns were found in the partitioning of oil compounds between seawater and MOS. However, these patterns did not translate to any significant differences in the partitioning of oil compounds into mussel tissue between the two oil treatments. DNA damage did not exceed background levels (10% tail DNA or less; to be expected in healthy, viable cells) at any sampling time point, but significantly higher DNA damage was observed in CEWAF-T compared to MOS-T mussels after the recovery phase. After the exposure, a significant difference emerged in the clearance rate between the CEWAF treatment and the agg-free control, but not between the MOS treatment and the marine snow control. All mussels except those from the CEWAF treatment exhibited an increased condition index after the exposure time. Together, these results suggest that aggregates could moderate the effects of oil exposure on blue mussels, possibly by providing better, more concentrated nutrition than unaggregated food particles.
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Affiliation(s)
- V Kalter
- Department of Ocean Sciences, Memorial University of Newfoundland, 0 Marine Lab Road, St. John's NL A1C 5S7, Canada.
| | - B de Jourdan
- Huntsman Marine Science Centre, 1 Lower Campus Rd, St. Andrews, New Brunswick E5B 2L7, Canada
| | - N Chorfa
- Centre for Earth Observation Science, Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - F Wang
- Centre for Earth Observation Science, Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - D Schneider
- Department of Ocean Sciences, Memorial University of Newfoundland, 0 Marine Lab Road, St. John's NL A1C 5S7, Canada
| | - U Passow
- Department of Ocean Sciences, Memorial University of Newfoundland, 0 Marine Lab Road, St. John's NL A1C 5S7, Canada
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Sharma G, Chadha P. Evaluation of haematological, genotoxic, cytotoxic and ATR-FTIR alterations in blood cells of fish Channa punctatus after acute exposure of aniline. Sci Rep 2023; 13:20757. [PMID: 38007596 PMCID: PMC10676417 DOI: 10.1038/s41598-023-48151-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 11/22/2023] [Indexed: 11/27/2023] Open
Abstract
Aniline (C6H5NH2) an important intermediate in the organic and fine chemical industry, is ubiquitously used worldwide. It is one of the important building block for manufacturing of 4,4-methylene diphenyl diisocyanate (MDI), accelerators in rubber processing, dyes, tattoo inks, photographic chemicals, antioxidants, corrosion inhibitors, pharmaceuticals and antiseptics. The current study evaluated 96 h LC50 of aniline and based on this, two sublethal concentrations (4.19 mg/l and 8.39 mg/l) were selected for acute exposure studies in freshwater food fish Channa punctatus. Erythrocytes of fish are nucleated hence they play an important role in physiology, immune system, protein signalling and haemostatic condition along with respiration. Blood samples were collected after 24, 48, 72, and 96 h of exposure to study haematological, cytotoxic and genotoxic effects of sublethal concentrations of aniline in C. punctatus. Symbolic elevation in time and dose dependent DNA damage was observed by comet assay as well as micronuclei assay revealing maximum damage after 96 h of exposure. After aniline exposure, scanning electron microscopy and ATR-FTIR studies showed anomalies in structure and alterations in biomolecules of RBCs of aniline exposed group as compared to control group respectively. Semi prep HPLC studies revealed bioaccumulation potential of aniline in higher concentration exposed group.
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Affiliation(s)
- Geetika Sharma
- Cytogenetics Lab, Department of Zoology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Pooja Chadha
- Cytogenetics Lab, Department of Zoology, Guru Nanak Dev University, Amritsar, 143005, India.
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Rodríguez R, Gaivão I, Aguado L, Espina M, García J, Martínez-Camblor P, Sierra LM. The Comet Assay in Drosophila: A Tool to Study Interactions between DNA Repair Systems in DNA Damage Responses In Vivo and Ex Vivo. Cells 2023; 12:1979. [PMID: 37566058 PMCID: PMC10417035 DOI: 10.3390/cells12151979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 08/12/2023] Open
Abstract
The comet assay in Drosophila has been used in the last few years to study DNA damage responses (DDR) in different repair-mutant strains and to compare them to analyze DNA repair. We have used this approach to study interactions between DNA repair pathways in vivo. Additionally, we have implemented an ex vivo comet assay, in which nucleoids from treated and untreated cells were incubated ex vivo with cell-free protein extracts from individuals with distinct repair capacities. Four strains were used: wild-type OregonK (OK), nucleotide excision repair mutant mus201, dmPolQ protein mutant mus308, and the double mutant mus201;mus308. Methyl methanesulfonate (MMS) was used as a genotoxic agent. Both approaches were performed with neuroblasts from third-instar larvae; they detected the effects of the NER and dmPolQ pathways on the DDR to MMS and that they act additively in this response. Additionally, the ex vivo approach quantified that mus201, mus308, and the double mutant mus201;mus308 strains presented, respectively, 21.5%, 52.9%, and 14.8% of OK strain activity over MMS-induced damage. Considering the homology between mammals and Drosophila in repair pathways, the detected additive effect might be extrapolated even to humans, demonstrating that Drosophila might be an excellent model to study interactions between repair pathways.
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Affiliation(s)
- Rubén Rodríguez
- Department of Functional Biology (Genetic Area), University of Oviedo, 33006 Oviedo, Spain; (R.R.)
- Oncology University Institute from Asturias (IUOPA), University of Oviedo, 33006 Oviedo, Spain
| | - Isabel Gaivão
- Department of Genetics and Biotechnology and CECAV, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal;
| | - Leticia Aguado
- Department of Functional Biology (Genetic Area), University of Oviedo, 33006 Oviedo, Spain; (R.R.)
- Oncology University Institute from Asturias (IUOPA), University of Oviedo, 33006 Oviedo, Spain
| | - Marta Espina
- Department of Functional Biology (Genetic Area), University of Oviedo, 33006 Oviedo, Spain; (R.R.)
- Oncology University Institute from Asturias (IUOPA), University of Oviedo, 33006 Oviedo, Spain
| | - Jorge García
- Department of Functional Biology (Genetic Area), University of Oviedo, 33006 Oviedo, Spain; (R.R.)
| | - Pablo Martínez-Camblor
- Department of Biomedical Data Science, Geisel Medical School at Dartmouth, Hanover, NH 03755, USA;
- Faculty of Health Sciences, Universidad Autónoma de Chile, Provedencia 7500912, Chile
| | - L. María Sierra
- Department of Functional Biology (Genetic Area), University of Oviedo, 33006 Oviedo, Spain; (R.R.)
- Oncology University Institute from Asturias (IUOPA), University of Oviedo, 33006 Oviedo, Spain
- Institute of Sanitary Research of the Principality of Asturias, Av. del Hospital Universitario, s/n, 33011 Oviedo, Spain
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Abstract
The comet assay is an effective method for identifying DNA breaks and alkali-labile sites induced by genotoxins. Performed as a single-cell electrophoresis, this assay is especially simplistic, and the results are easily reproducible. DNA breakage can be quantitatively assessed by the induced comet tail regions, which can be measured using a variety of comet software. This protocol will finish within approximately two hours with adequate preparation, and digitized images can be taken using a confocal or standard fluorescence microscopes after staining the cell nucleus with a DNA dye.
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Affiliation(s)
- Kade D Walsh
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Takamitsu A Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA.
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Sharma P, Sharma K, Chadha P. DNA Damage and Repair in different Tissues of Fresh Water Fish, <i>Channa punctata</i> after Acute and Subchronic Exposure to bisphenol A. Toxicol Int 2022. [DOI: 10.18311/ti/2022/v29i3/28352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The present study was conducted to investigate the genotoxic effect of Bis-Phenol A (BPA) after acute and subchronic exposure in different tissues of Channa punctata. The recovery in DNA damage was also ascertained after 30 days of cessation of exposure. Fish were exposed to different sublethal concentrations of BPA along with two controls i.e., with positive (acetone) and negative (water) controls for 96h (acute exposure) and 60 days (subchronic exposure) and after that fish were allowed to recover for 30 days in freshwater. The blood, liver, and gill tissue samples were collected at 24, 48, 72 and 96h for acute exposure and after 20, 40, and 60 days post-exposure for subchronic exposure. Exposed groups showed significantly higher DNA damage in both acute and subchronic exposure as compared to control groups. In the case of acute exposure, the highest damage was observed at 24 h of exposure followed by a decline in the value of all the parameters, while in the later hours of exposure these values further increased. On the other hand, in the case of sub-chronic exposure, the highest damage was observed after 60 days of exposure. Recovery experiment showed a decrease in the values of all the parameters studied. The result of the study clearly showed that BPA caused DNA damage in Channa punctata after acute as well as subchronic exposure.
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Sharma A, Chauhan P, Sharma K, Kalotra V, Kaur A, Chadha P, Kaur S, Kaur A. An endophytic Schizophyllum commune possessing antioxidant activity exhibits genoprotective and organprotective effects in fresh water fish Channa punctatus exposed to bisphenol A. BMC Microbiol 2022; 22:291. [PMID: 36474157 PMCID: PMC9724346 DOI: 10.1186/s12866-022-02713-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/17/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Oxidative stress is responsible for the onset of several chronic and degenerative diseases. Exogenous supply of antioxidants is reported to neutralize the effects of oxidative stress. Several synthetic antioxidants suffer from various side effects which necessitates the exploration of antioxidant compounds from natural sources. Endophytic fungi residing in the plants are gaining the attention of researchers as a source of novel antioxidants. Majority of the research conducted so far on endophytic fungi has been restricted to the members of phylum ascomycota. Basidiomycota, inspite of their immense bioactive potential remain relatively unexploited. This study aimed to assess the ameliorative effects of an endophytic Schizophyllum commune (basidiomycetous fungus) against oxidative stress associated altered antioxidant levels, genotoxicity and cellular damage to different organs in bisphenol A exposed fresh water fish Channa punctatus. RESULTS Good antioxidant and genoprotective potential was exhibited by S. commune extract in in vitro studies conducted using different antioxidant, DNA damage protection, and cytokinesis blocked micronuclei assays. In vivo studies were performed in fresh water fish Channa punctatus exposed to bisphenol A. A significant decrease in the considered parameters for DNA damage (% micronuclei and comet assay) were recorded in fish treated with S. commune extract on comparison with untreated bisphenol A exposed group. The S. commune extract treated fish also exhibited an increase in the level of antioxidant enzymes viz. catalase, superoxide dismutase and glutathione reductase as well as histoprotective effect on various organs. GC-MS analysis revealed the presence of 3-n-propyl-2,4-pentanedione, n-heptadecanol-1, trans-geranylgeraniol, 3-ethyl-2-pentadecanone, 1-heneicosanol and squalene as some of the compounds in S. commune extract. CONCLUSION The study highlights the significance of an endophytic basidiomycetous fungus S. commune as a source of antioxidant compounds with possible therapeutic potential.
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Affiliation(s)
- Avinash Sharma
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
| | - Pooja Chauhan
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
| | - Khushboo Sharma
- grid.411894.10000 0001 0726 8286Department of Zoology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
| | - Vishali Kalotra
- grid.411894.10000 0001 0726 8286Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab India
| | - Anupam Kaur
- grid.411894.10000 0001 0726 8286Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab India
| | - Pooja Chadha
- grid.411894.10000 0001 0726 8286Department of Zoology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
| | - Sukhraj Kaur
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
| | - Amarjeet Kaur
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, 143005 Amritsar, Punjab India
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Evaluation of Genetic Damage and Antigenotoxic Effect of Ascorbic Acid in Erythrocytes of Orochromis niloticus and Ambystoma mexicanum Using Migration Groups as a Parameter. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12157507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The comet assay system is an efficient method used to assess DNA damage and repair; however, it currently provides the average result and, unfortunately, the heterogeneity of DNA damage loses relevance. To take advantage of this heterogeneity, migration groups (MGs) of cell comets can be formed. In this study, genetic damage was quantified in erythrocytes of Oreochromis niloticus and Ambystoma mexicanum exposed to ethyl methanesulfonate (ethyl methanesulfonate (EMS) 2.5, 5, and 10 mM over two hours) and ultraviolet C radiation (UV-C) for 5, 10, and 15 min using the tail length, tail moment, and migration group parameters. Additionally, blood cells were exposed to UV-C radiation for 5 min and treated post-treatment at 5, 10, and 15 mM ascorbic acid (AA) for two hours. With the MG parameter, it was possible to observe variations in the magnitude of genetic damage. Our data indicate that MGs help to detect basal and induced genetic damage or damage reduction with approximately the same efficiency of the tail length and tail moment parameters. MGs can be a complementary parameter used to assess DNA integrity in species exposed to mutagens.
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Bernardeschi M, Guidi P, Palumbo M, Genovese M, Alfè M, Gargiulo V, Lucchesi P, Scarcelli V, Falleni A, Bergami E, Freyria FS, Bonelli B, Corsi I, Frenzilli G. Suitability of Nanoparticles to Face Benzo(a)pyrene-Induced Genetic and Chromosomal Damage in M. galloprovincialis. An In Vitro Approach. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1309. [PMID: 34063431 PMCID: PMC8155950 DOI: 10.3390/nano11051309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/11/2021] [Accepted: 05/13/2021] [Indexed: 11/17/2022]
Abstract
Benzo(a)pyrene (B(a)P) is a well-known genotoxic agent, the removal of which from environmental matrices is mandatory, necessitating the application of cleaning strategies that are harmless to human and environmental health. The potential application of nanoparticles (NPs) in the remediation of polluted environments is of increasing interest. Here, specifically designed NPs were selected as being non-genotoxic and able to interact with B(a)P, in order to address the genetic and chromosomal damage it produces. A newly formulated pure anatase nano-titanium (nano-TiO2), a commercial mixture of rutile and anatase, and carbon black-derived hydrophilic NPs (HNP) were applied. Once it had been ascertained that the NPs selected for the work did not induce genotoxicity, marine mussel gill biopsies were exposed in vitro to B(a)P (2 μg/mL), alone and in combination with the selected NPs (50 µg/mL nano-TiO2, 10 µg/mL HNP). DNA primary reversible damage was evaluated by means of the Comet assay. Chromosomal persistent damage was assessed on the basis of micronuclei frequency and nuclear abnormalities by means of the Micronucleus-Cytome assay. Transmission Electron Microscopy (TEM) was performed to investigate the mechanism of action exerted by NPs. Pure Anatase n-TiO2 was found to be the most suitable for our purpose, as it is cyto- and genotoxicity free and able to reduce the genetic and chromosomal damage associated with exposure to B(a)P.
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Affiliation(s)
- Margherita Bernardeschi
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Patrizia Guidi
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Mara Palumbo
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Massimo Genovese
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50121 Florence, Italy;
| | - Michela Alfè
- Institute of Science and Technology for Sustainable Energy and Mobility STEMS-CNR, 80126 Naples, Italy; (M.A.); (V.G.)
| | - Valentina Gargiulo
- Institute of Science and Technology for Sustainable Energy and Mobility STEMS-CNR, 80126 Naples, Italy; (M.A.); (V.G.)
| | - Paolo Lucchesi
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Vittoria Scarcelli
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Alessandra Falleni
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
| | - Elisa Bergami
- Earth and Environmental Sciences and INSTM Local Unit, Department of Physical, University of Siena, 53100 Siena, Italy; (E.B.); (I.C.)
| | - Francesca S. Freyria
- INSTM Unit of Torino-Politecnico, Department of Applied Science and Technology, 10129 Politecnico di Torino, Italy; (F.S.F.); (B.B.)
| | - Barbara Bonelli
- INSTM Unit of Torino-Politecnico, Department of Applied Science and Technology, 10129 Politecnico di Torino, Italy; (F.S.F.); (B.B.)
| | - Ilaria Corsi
- Earth and Environmental Sciences and INSTM Local Unit, Department of Physical, University of Siena, 53100 Siena, Italy; (E.B.); (I.C.)
| | - Giada Frenzilli
- Section of Applied Biology and Genetics and INSTM Local Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (M.B.); (P.G.); (M.P.); (P.L.); (V.S.); (A.F.)
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Sharma P, Chadha P. Bisphenol A induced toxicity in blood cells of freshwater fish Channa punctatus after acute exposure. Saudi J Biol Sci 2021; 28:4738-4750. [PMID: 34354462 PMCID: PMC8324972 DOI: 10.1016/j.sjbs.2021.04.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 01/24/2023] Open
Abstract
The widespread use of bisphenol A (BPA) has led to its ubiquity in the natural environment. It is extensively incorporated into different industrial products and is associated with deleterious health effects on both public and wildlife. The current trial was conducted to determine the toxic potential of bisphenol A using various parameters viz haematological, biochemical, and cytological in freshwater fish Channa punctatus. For this purpose, fish were exposed to 1.81 mg/l (1/4 of LC50) and 3.81 mg/l (1/2 of LC50) of BPA along with positive (acetone) and negative controls (water) for 96 h. The blood samples were collected at 24, 48, 72, and 96 h post-exposure. Compared to the control group, fish after acute exposure to BPA showed a significant decrease in HB content, number of red blood cells, PCV values whereas a significant increase in WBCs count was recorded with an increase in the exposure period. Besides, oxidative stress (determined as malondialdehyde content) increased as BPA concentration increased. Further, the activity of different antioxidant enzymes like catalase, and superoxide dismutase decreased significantly after treatment. Results also showed significantly increased frequency of morphological alterations, nuclear changes, and increased DNA damage potential of BPA in red blood cells. Further structural analysis of erythrocytes in maximally damaged group using Scanning Electron Microscopy was performed. The study concludes that BPA exhibits genotoxic activity and oxidative stress could be one of the mechanisms leading to genetic toxicity.
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Affiliation(s)
- Prince Sharma
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Pooja Chadha
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
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Influence of Kv11.1 (hERG1) K + channel expression on DNA damage induced by the genotoxic agent methyl methanesulfonate. Pflugers Arch 2021; 473:197-217. [PMID: 33452554 DOI: 10.1007/s00424-021-02517-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 12/22/2020] [Accepted: 01/05/2021] [Indexed: 10/22/2022]
Abstract
Besides their crucial role in cell electrogenesis and maintenance of basal membrane potential, the voltage-dependent K+ channel Kv11.1/hERG1 shows an essential impact in cell proliferation and other processes linked to the maintenance of tumour phenotype. To check the possible influence of channel expression on DNA damage responses, HEK293 cells, treated with the genotoxic agent methyl methanesulfonate (MMS), were compared with those of a HEK-derived cell line (H36), permanently transfected with the Kv11.1-encoding gene, and with a third cell line (T2) obtained under identical conditions as H36, by permanent transfection of another unrelated plasma membrane protein encoding gene. In addition, to gain some insights about the canonical/conduction-dependent channel mechanisms that might be involved, the specific erg channel inhibitor E4031 was used as a tool. Our results indicate that the expression of Kv11.1 does not influence MMS-induced changes in cell cycle progression, because no differences were found between H36 and T2 cells. However, the canonical ion conduction function of the channel appeared to be associated with decreased cell viability at low/medium MMS concentrations. Moreover, direct DNA damage measurements, using the comet assay, demonstrated for the first time that Kv11.1 conduction activity was able to modify MMS-induced DNA damage, decreasing it particularly at high MMS concentration, in a way related to PARP1 gene expression. Finally, our data suggest that the canonical Kv11.1 effects may be relevant for tumour cell responses to anti-tumour therapies.
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Mearns AJ, Morrison AM, Arthur C, Rutherford N, Bissell M, Rempel-Hester MA. Effects of pollution on marine organisms. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:1510-1532. [PMID: 32671886 DOI: 10.1002/wer.1400] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
This review covers selected 2019 articles on the biological effects of pollutants, including human physical disturbances, on marine and estuarine plants, animals, ecosystems, and habitats. The review, based largely on journal articles, covers field, and laboratory measurement activities (bioaccumulation of contaminants, field assessment surveys, toxicity testing, and biomarkers) as well as pollution issues of current interest including endocrine disrupters, emerging contaminants, wastewater discharges, marine debris, dredging, and disposal. Special emphasis is placed on effects of oil spills and marine debris due largely to the 2010 Deepwater Horizon oil blowout in the Gulf of Mexico and proliferation of data on the assimilation and effects of marine debris microparticulates. Several topical areas reviewed in the past (e.g., mass mortalities ocean acidification) were dropped this year. The focus of this review is on effects, not on pollutant sources, chemistry, fate, or transport. There is considerable overlap across subject areas (e.g., some bioaccumulation data may be appeared in other topical categories such as effects of wastewater discharges, or biomarker studies appearing in oil toxicity literature). Therefore, we strongly urge readers to use keyword searching of the text and references to locate related but distributed information. Although nearly 400 papers are cited, these now represent a fraction of the literature on these subjects. Use this review mainly as a starting point. And please consult the original papers before citing them.
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Affiliation(s)
- Alan J Mearns
- Emergency Response Division, National Oceanic and Atmospheric Administration (NOAA), Seattle, Washington
| | | | | | - Nicolle Rutherford
- Emergency Response Division, National Oceanic and Atmospheric Administration (NOAA), Seattle, Washington
| | - Matt Bissell
- Emergency Response Division, National Oceanic and Atmospheric Administration (NOAA), Seattle, Washington
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Zhao Y, Sun L, Li Q, Yan X, Li Z, Liu B, Li G. Use of integrated biomarker response for evaluating antioxidant stress and DNA damage of earthworms (Eisenia fetida) in decabromodiphenyl ethane-contaminated soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114706. [PMID: 32388306 DOI: 10.1016/j.envpol.2020.114706] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/24/2020] [Accepted: 04/29/2020] [Indexed: 05/22/2023]
Abstract
Decabromodiphenyl ethane (DBDPE) is a new and popular type of brominated flame retardant (BFR) with high bromine content, strong thermal stability, and ultraviolet resistance. To evaluated the potential toxicity of this new BFR to soil ecosystem, different concentrations of DBDPE were used to observe effects on earthworms (Eisenia fetida) in artificial soil. The reactive oxygen species (ROS) contents, activities of antioxidase system and detoxify enzyme, levels of malondialdehyde (MDA), as well as DNA damage in earthworms were measured after exposure to 0, 2.5, 5, 10, and 20 mg/kg DBDPE in artificial soil for 7, 14, 21, and 28 days. The results showed that ROS and MDA content significantly increased for all treatments from days 7-21, followed by a decrease. Throughout the experimental period, SOD, POD, and CAT activities increased. The GST activity was stimulated significantly from days 14-28. Besides, the olive tail moment (OTM) value in all treated groups was significantly higher than that in the control and exhibited a concentration-related and exposure time-related response. This is the first study evaluating the biological toxicity of BFR at different concentrations using an integrated biomarker response index. Our results show that DBDPE has biochemical toxicity on earthworms, which sheds some light on the potential risks of DBDPE in the soil environment and provides a basis for the monitoring and diagnosis of soils contaminated with DBDPE.
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Affiliation(s)
- Yiyi Zhao
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China; School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Liangqi Sun
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Qianqian Li
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Xiaotong Yan
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Ziwei Li
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Bin Liu
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Guangde Li
- College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China.
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Heredia-García G, Gómez-Oliván LM, Orozco-Hernández JM, Luja-Mondragón M, Islas-Flores H, SanJuan-Reyes N, Galar-Martínez M, García-Medina S, Dublán-García O. Alterations to DNA, apoptosis and oxidative damage induced by sucralose in blood cells of Cyprinus carpio. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:411-421. [PMID: 31351285 DOI: 10.1016/j.scitotenv.2019.07.165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/03/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Sucralose (SUC) is an organochlorine that is used as a common sweetener in different dietary products around the world. Its extended use and production have led to this product is released into the environment in concentrations ranging from ng L-1 to μg L-1 in surface waters, groundwaters, wastewater treatment plants and ocean waters. A previous study carried out by our research team demonstrated that SUC is capable of inducing oxidative stress in Cyprinus carpio at environmentally-relevant concentrations. The aim of this study was to evaluate if SUC was capable of inducing alterations to DNA, apoptosis, and oxidative damage in the blood cells of C. carpio. Carps were exposed to two environmentally-relevant concentrations (0.05 and 155 μg L-1) of SUC, and the following biomarkers were determined: comet assay, micronucleus test (MN), caspase-3 activity, TUNEL assay, hydroperoxide content, lipid peroxidation level, protein carbonyl content and superoxide dismutase and catalase activities. Results obtained showed that SUC is capable of inducing DNA damage. A maximum increase of 35% and 23% were observed for c1 and c2, respectively in the comet assay; increases of 586% and 507.7% for c1 and c2, respectively, were found at 72 h through the MN test. The activity of caspase-3 showed a greater response for c1 and c2 at 96 h, with 271% and 493.5%, respectively. TUNEL assay also showed the highest response at 96 h, with 51.8 for c1 and 72.9 for c2; c1 y c2 were able to induce oxidative stress with the highest expression at 72 h. A correlation between DNA damage biomarkers, apoptosis and plasma levels of SUC in both concentrations were observed. With the data obtained, we can conclude that SUC, at environmentally-relevant concentrations, was capable of generating DNA alterations, apoptosis and oxidative stress in blood cells in common carp.
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Affiliation(s)
- Gerardo Heredia-García
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico
| | - Leobardo Manuel Gómez-Oliván
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico.
| | - José Manuel Orozco-Hernández
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico
| | - Marlenee Luja-Mondragón
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico
| | - Hariz Islas-Flores
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico
| | - Nely SanJuan-Reyes
- Laboratorio de Toxicología Acuática, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Av. Wilfrido Massieu s/n y cerrada Manuel Stampa, Col. Industrial Vallejo, Ciudad de México CP 07700, Mexico
| | - Marcela Galar-Martínez
- Laboratorio de Toxicología Acuática, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Av. Wilfrido Massieu s/n y cerrada Manuel Stampa, Col. Industrial Vallejo, Ciudad de México CP 07700, Mexico
| | - Sandra García-Medina
- Laboratorio de Toxicología Acuática, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Av. Wilfrido Massieu s/n y cerrada Manuel Stampa, Col. Industrial Vallejo, Ciudad de México CP 07700, Mexico
| | - Octavio Dublán-García
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan, Colonia Residencial Colón, CP 50120 Toluca, Estado de México, Mexico
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14
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Mišík M, Isidori M, Umbuzeiro G. Ecotoxicology: Conventional and new topics and methods. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 842:1-2. [PMID: 31255216 DOI: 10.1016/j.mrgentox.2019.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Miroslav Mišík
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
| | - Marina Isidori
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi, 43, 81100 Caserta, Italy
| | - Gisela Umbuzeiro
- Laboratory of Ecotoxicology and Genotoxicity, School of Technology, University of Campinas, Limeira, SP, Brazil
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