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Harper JM. Primary Cell Culture as a Model System for Evolutionary Molecular Physiology. Int J Mol Sci 2024; 25:7905. [PMID: 39063147 PMCID: PMC11277064 DOI: 10.3390/ijms25147905] [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: 06/13/2024] [Revised: 07/06/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
Primary cell culture is a powerful model system to address fundamental questions about organismal physiology at the cellular level, especially for species that are difficult, or impossible, to study under natural or semi-natural conditions. Due to their ease of use, primary fibroblast cultures are the dominant model system, but studies using both somatic and germ cells are also common. Using these models, genome evolution and phylogenetic relationships, the molecular and biochemical basis of differential longevities among species, and the physiological consequences of life history evolution have been studied in depth. With the advent of new technologies such as gene editing and the generation of induced pluripotent stem cells (iPSC), the field of molecular evolutionary physiology will continue to expand using both descriptive and experimental approaches.
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Affiliation(s)
- James M Harper
- Department of Biological Sciences, Sam Houston State University, 1900 Avenue I, Huntsville, TX 77341, USA
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Sah R, Khanduri M, Chaudhary P, Thomas Paul K, Gururani S, Banwala K, Paul C, Jose MA, Bora S, Ramachandran A, Badola R, Hussain SA. Dietary exposure of potentially toxic elements to freshwater mammals in the Ganga river basin, India. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:123928. [PMID: 38615836 DOI: 10.1016/j.envpol.2024.123928] [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: 02/23/2024] [Revised: 03/19/2024] [Accepted: 04/03/2024] [Indexed: 04/16/2024]
Abstract
The threatened Gangetic dolphin (Platanista gangetica) and smooth-coated otter (Lutrogale perspicillata) occuring in the Ganga River Basin (GRB), are experiencing a decline in their population and distribution range owing to multiple anthropogenic pressures, including pollution by Potentially Toxic Elements (PTEs). Apex predators primarily encounter contaminants through dietary exposure. Yet, notable gaps persist in our understanding of the risks associated with the ingestion of PTE-contaminated prey for Gangetic dolphins and smooth-coated otters. In this study, we examined the occurrence and spatial variation of PTEs in the prey (fish) of both these riverine mammals across three major rivers of the Basin, while also evaluating the associated risk of ingesting contaminated prey. Our assessment revealed no statistical variation in bioaccumulation profiles of PTEs across the three rivers, attributable to comparable land use patterns and PTE consumption within the catchment. Zn and Cu were the most dominant PTEs in the prey species. The major potential sources of pollution identified in the catchment include agricultural settlements, vehicular emissions, and the presence of metal-based additives in plastics. Zn, As and Hg accumulation vary with the trophic level whereas some PTEs show concentration (Hg) and dilution (As, Cr, Pb and Zn) with fish growth. The Risk Quotient (RQ), based on the dietary intake of contaminated prey calculated using Toxicity Reference Value was consistently below 1 indicating no significant risk to these riverine mammals. Conversely, with the exception of Co and Ni, the Reference Dose-based RQs for all other PTEs indicated a substantial risk for Gangetic dolphins and smooth-coated otters through dietary exposure. This study serves as a pivotal first step in assessing the risk of PTEs for two threatened riverine mammals in a densely populated river basin, highlighting the importance of their prioritization in regular monitoring to reinforce the ongoing conservation efforts.
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Affiliation(s)
- Ruchika Sah
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - Megha Khanduri
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - Pooja Chaudhary
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - K Thomas Paul
- Agilent Technologies India Pvt Ltd, Doddanakundi Industrial Area 2, Mahadevapura, Bengaluru, 560066, India
| | | | - Kirti Banwala
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - Chitra Paul
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - Mebin Aby Jose
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | - Sarita Bora
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
| | | | - Ruchi Badola
- Wildlife Institute of India, Chandrabani, Dehradun, 248001, India
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Lu H, Toyoda JH, Wise SS, Browning CL, Speer RM, Croom-Pérez TJ, Bolt A, Meaza I, Wise JP. A whale of a tale: whale cells evade the driving mechanism for hexavalent chromium-induced chromosome instability. Toxicol Sci 2024; 199:49-62. [PMID: 38539048 PMCID: PMC11057468 DOI: 10.1093/toxsci/kfae030] [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] [Indexed: 04/26/2024] Open
Abstract
Chromosome instability, a hallmark of lung cancer, is a driving mechanism for hexavalent chromium [Cr(VI)] carcinogenesis in humans. Cr(VI) induces structural and numerical chromosome instability in human lung cells by inducing DNA double-strand breaks and inhibiting homologous recombination repair and causing spindle assembly checkpoint (SAC) bypass and centrosome amplification. Great whales are long-lived species with long-term exposures to Cr(VI) and accumulate Cr in their tissue, but exhibit a low incidence of cancer. Data show Cr(VI) induces fewer chromosome aberrations in whale cells after acute Cr(VI) exposure suggesting whale cells can evade Cr(VI)-induced chromosome instability. However, it is unknown if whales can evade Cr(VI)-induced chromosome instability. Thus, we tested the hypothesis that whale cells resist Cr(VI)-induced loss of homologous recombination repair activity and increased SAC bypass and centrosome amplification. We found Cr(VI) induces similar amounts of DNA double-strand breaks after acute (24 h) and prolonged (120 h) exposures in whale lung cells, but does not inhibit homologous recombination repair, SAC bypass, or centrosome amplification, and does not induce chromosome instability. These data indicate whale lung cells resist Cr(VI)-induced chromosome instability, the major driver for Cr(VI) carcinogenesis at a cellular level, consistent with observations that whales are resistant to cancer.
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Affiliation(s)
- Haiyan Lu
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Jennifer H Toyoda
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Cynthia L Browning
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Rachel M Speer
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Tayler J Croom-Pérez
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - Alicia Bolt
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, New Mexico 87131, USA
| | - Idoia Meaza
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40292, USA
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Bailey D, Finlayson KA, Dogruer G, Bennett WW, van de Merwe JP. Dose metric evaluation of a cell-based bioassay for assessing the toxicity of metals to Dugong dugon: Effect of metal-media interactions on exposure concentrations. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 255:106394. [PMID: 36603369 DOI: 10.1016/j.aquatox.2023.106394] [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: 08/03/2022] [Revised: 12/21/2022] [Accepted: 01/01/2023] [Indexed: 06/17/2023]
Abstract
Cell-based toxicity testing has emerged as a useful tool in (eco)toxicological research, allowing the ethical assessment of the effects of contaminants such as trace metals on marine megafauna. However, metal interactions with various dissolved ligands in the microplate environment may influence the effective exposure concentrations. Hence, the cells are not exposed to the nominal concentrations within the test system. This study aimed to establish and evaluate the effectiveness of cell-based bioassays for investigating the toxicity of selected metals in dugongs through the following objectives: (1) measure the cytotoxic potential of cadmium (Cd2+), and chromium (Cr6+) to dugong skin cell cultures, (2) investigate the interactions between media constituents and selected trace metals in cell-based bioassays, and (3) evaluate the risk to a free-ranging population of dugong based on effect values. Chromium was the most toxic of the metals tested (EC50 = 1.14 µM), followed by Cd (EC50 = 6.35 µM). Assessment of ultrafiltered (< 3 kDa) exposure media showed that 1% and 92.5% of Cr and Cd were associated with larger organic components of the media. Further, the binding of Cd to media constituents was calculated to underestimate Cd toxicity in cell-based assays by an order of magnitude. This understanding of metal partitioning in cell-based bioassays provides a more accurate method for assessing toxicity in cell-based bioassays. In addition, this study illustrated that dugong cells are more sensitive to Cr and Cd than other marine wildlife species. The chemical risk assessment found the dugong population in Moreton Bay to be at high risk from Cd exposure.
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Affiliation(s)
- David Bailey
- Coastal and Marine Research Centre, Griffith University, Gold Coast, Queensland, Australia; Australian Rivers Institute, Griffith University, Queensland, Australia
| | - Kimberly A Finlayson
- Coastal and Marine Research Centre, Griffith University, Gold Coast, Queensland, Australia; Australian Rivers Institute, Griffith University, Queensland, Australia.
| | - Gulsah Dogruer
- Australian Rivers Institute, Griffith University, Queensland, Australia; Wageningen Marine Research, Wageningen University and Research, Netherlands
| | - William W Bennett
- Coastal and Marine Research Centre, Griffith University, Gold Coast, Queensland, Australia
| | - Jason P van de Merwe
- Coastal and Marine Research Centre, Griffith University, Gold Coast, Queensland, Australia; Australian Rivers Institute, Griffith University, Queensland, Australia
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Gumus E, Sisko A, Abas BI, Demirkan B, Cevik O. Quercetin protects mouse oocytes against chromium-induced damage in vitro and in vivo. J Trace Elem Med Biol 2023; 75:127087. [PMID: 36209711 DOI: 10.1016/j.jtemb.2022.127087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 09/12/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND Chromium (Cr) is a naturally-occurring element that is used in various fields of industry. Humans may be exposed to hexavalent chromium [Cr(VI)], which is one of the stable valence states of the chromium through contaminated soil, air, and water. Exposure to Cr(VI) through contaminated drinking water, soil and air causes various cancers and also fertility problems in animals and humans. Quercetin (QCT), a common flavonoid compound, has numerous biological effects as an antioxidant and free radical scavenger, but its function and mechanisms in reproductive processes in various species remain unclear. This study aims to determine the chromium effects on mice oocyte quality and the ameliorative effect of QCT in both in vitro and in vivo experimental models. METHODS For the in vitro experiment, oocytes were collected and divided into the control, sham, QCT-treated, Cr(VI) (potassium dichromate), and treatment [Cr(VI)+QCT] groups. Collected oocytes were cultured in maturation medium with or without 10 µM quercetin and 10 µM Cr(VI) for 14 h based on the defined experimental design. For the in vivo experiment, the mice were randomly divided into the control, sham, QCT-treated, Cr(VI), and Cr(VI) + QCT groups. Control and sham mice received regular drinking water and diet. Cr(VI) group received Cr(VI) (50 ppm in drinking water) and Cr(VI) + QCT group received 50 ppm Cr(VI) with QCT (20 mg/kg body wt, through i.p) for a period of 21 days and then oocytes were collected and cultured for 14 h for in vitro maturation. For both experiments, at the end of the culture period, we examined the ameliorative effect of QCT on oocyte maturation, spindle formation, ROS production, mitochondrial function, and apoptosis. RESULTS Our in vitro and in vivo results showed that Cr(VI) disrupt the oocyte maturation and spindle formation (P < 0.001). Furthermore, we found that exposure to Cr(VI) significantly increased ROS levels and decreased mitochondrial membrane potential (P < 0.001). In addition, exposure to Cr(VI) induced early apoptosis and downregulated the Bcl-2 mRNA expression and upregulated the Caspase-3 and Bax mRNAs expression (P < 0.01). Finally, quercetin significantly restored the detrimental effects of Cr(VI). CONCLUSION The results indicated that quercetin protects the oocytes against Cr(VI) toxicity through the suppression of oxidative stress and apoptosis. The conclusions drawn from our study's findings suggest that quercetin might be useful agent for oocyte maturation in case of possible exposure to toxic substances such as chromium.
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Affiliation(s)
- Erkan Gumus
- Department of Histology and Embryology, School of Medicine, Adnan Menderes University, Aydın, Turkey.
| | - Asli Sisko
- Department of Histology and Embryology, School of Medicine, Adnan Menderes University, Aydın, Turkey
| | - Burcin Irem Abas
- Department of Biochemistry, School of Medicine, Adnan Menderes University, Aydın, Turkey
| | - Busra Demirkan
- Department of Histology and Embryology, School of Medicine, Adnan Menderes University, Aydın, Turkey
| | - Ozge Cevik
- Department of Biochemistry, School of Medicine, Adnan Menderes University, Aydın, Turkey
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Vazquez JM, Pena MT, Muhammad B, Kraft M, Adams LB, Lynch VJ. Parallel evolution of reduced cancer risk and tumor suppressor duplications in Xenarthra. eLife 2022; 11:82558. [PMID: 36480266 PMCID: PMC9810328 DOI: 10.7554/elife.82558] [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: 08/09/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
The risk of developing cancer is correlated with body size and lifespan within species, but there is no correlation between cancer and either body size or lifespan between species indicating that large, long-lived species have evolved enhanced cancer protection mechanisms. Previously we showed that several large bodied Afrotherian lineages evolved reduced intrinsic cancer risk, particularly elephants and their extinct relatives (Proboscideans), coincident with pervasive duplication of tumor suppressor genes (Vazquez and Lynch, 2021). Unexpectedly, we also found that Xenarthrans (sloths, armadillos, and anteaters) evolved very low intrinsic cancer risk. Here, we show that: (1) several Xenarthran lineages independently evolved large bodies, long lifespans, and reduced intrinsic cancer risk; (2) the reduced cancer risk in the stem lineages of Xenarthra and Pilosa coincided with bursts of tumor suppressor gene duplications; (3) cells from sloths proliferate extremely slowly while Xenarthran cells induce apoptosis at very low doses of DNA damaging agents; and (4) the prevalence of cancer is extremely low Xenarthrans, and cancer is nearly absent from armadillos. These data implicate the duplication of tumor suppressor genes in the evolution of remarkably large body sizes and decreased cancer risk in Xenarthrans and suggest they are a remarkably cancer-resistant group of mammals.
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Affiliation(s)
- Juan Manuel Vazquez
- Department of Integrative Biology, Valley Life Sciences, University of California, BerkeleyBerkeleyUnited States
| | - Maria T Pena
- United States Department of Health and Human Services, Health Resources and Services Administration, Health Systems Bureau, National Hansen's Disease ProgramBaton RougeUnited States
| | - Baaqeyah Muhammad
- Department of Biological Sciences, University at Buffalo, SUNYBuffaloUnited States
| | - Morgan Kraft
- Department of Biological Sciences, University at Buffalo, SUNYBuffaloUnited States
| | - Linda B Adams
- United States Department of Health and Human Services, Health Resources and Services Administration, Health Systems Bureau, National Hansen's Disease ProgramBaton RougeUnited States
| | - Vincent J Lynch
- Department of Biological Sciences, University at Buffalo, SUNYBuffaloUnited States
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Ochiai M, Nguyen HT, Kurihara N, Hirano M, Tajima Y, Yamada TK, Iwata H. Directly Reprogrammed Neurons as a Tool to Assess Neurotoxicity of the Contaminant 4-Hydroxy-2',3,5,5'-tetrachlorobiphenyl (4'OH-CB72) in Melon-Headed Whales. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8159-8168. [PMID: 34061511 DOI: 10.1021/acs.est.1c01074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Whales accumulate high levels of environmental pollutants. Exposure to polychlorinated biphenyls (PCBs) and their metabolites (OH-PCBs) could be linked to abnormal behavior, which may lead to mass stranding of marine mammals. Whales may thus suffer from adverse effects such as neuronal dysfunction, yet testing the neurotoxicity of these compounds has never been feasible for these species. This study established neurons chemically reprogrammed from fibroblasts of mass stranded melon-headed whales (Peponocephala electra) and used them for in vitro neurotoxicity assays. Exposure to 4-hydroxy-2',3,5,5'-tetrachlorobiphenyl (4'OH-CB72), a metabolite of PCBs, caused apoptosis in the reprogrammed neurons. Transcriptome analysis of 4'OH-CB72-treated whale neurons showed altered expressions of genes associated with oxidative phosphorylation, chromatin degradation, axonal transport, and neurodegenerative diseases. These results suggest that 4'OH-CB72 exposure may induce neurodegeneration through disrupted apoptotic processes. A comparison of the results with human reprogrammed neurons revealed the specific effects on the whale neurons. Our noninvasive approach using fibroblast-derived neurons is useful for hazard and risk assessments of neurotoxicity in whales.
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Affiliation(s)
- Mari Ochiai
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama City, Ehime 790-8577, Japan
| | - Hoa Thanh Nguyen
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama City, Ehime 790-8577, Japan
| | - Nozomi Kurihara
- Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1, Yoshida, Yamaguchi City, Yamaguchi 753-8515, Japan
| | - Masashi Hirano
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama City, Ehime 790-8577, Japan
| | - Yuko Tajima
- Division of Vertebrates, Department of Zoology, National Museum of Nature and Science, 4-1-1, Amakubo, Tsukuba, Ibaraki 305-0005, Japan
| | - Tadasu K Yamada
- Division of Vertebrates, Department of Zoology, National Museum of Nature and Science, 4-1-1, Amakubo, Tsukuba, Ibaraki 305-0005, Japan
| | - Hisato Iwata
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama City, Ehime 790-8577, Japan
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Biomarkers of geno- and cytotoxicity in the native broad-snouted caiman (Caiman latirostris): Chromosomal aberrations and mitotic index. Mutat Res 2021; 867:503353. [PMID: 34266623 DOI: 10.1016/j.mrgentox.2021.503353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/24/2021] [Accepted: 03/25/2021] [Indexed: 11/20/2022]
Abstract
We evaluated the sensitivity of the chromosomal aberration (CA) and mitotic index (MI) assays on peripheral blood lymphocytes (PBLs) of Caiman latirostris, following ex vivo exposure to the alkylating agent, MMS. Two concentrations of MMS were tested in cultured peripheral blood. Relative to controls, MMS exposure reduced the number of metaphases observed, but both the numbers of cells with MN and the percentages of aberrant metaphases increased. The types of CA identified were chromosome and chromatid breaks, chromosomal rearrangements, monosomies, and nullisomies, with significantly higher values in the MMS-exposed groups. The incorporation of the MI and CA tests in C. latirostris can provide information on damage caused by xenobiotic exposures.
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Meaza I, Speer RM, Toyoda JH, Lu H, Wise SS, Croom-Perez TJ, Aboueissa AEM, Wise JP. Prolonged exposure to particulate Cr(VI) is cytotoxic and genotoxic to fin whale cells. J Trace Elem Med Biol 2020; 62:126562. [PMID: 32570008 PMCID: PMC7655514 DOI: 10.1016/j.jtemb.2020.126562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 05/13/2020] [Accepted: 05/20/2020] [Indexed: 01/04/2023]
Abstract
BACKGROUND Hexavalent chromium [Cr(VI)] is a human lung carcinogen and global marine pollutant. High Cr concentrations, resembling the ones observed in occupationally exposed workers, have been observed in fin whales (Balaenoptera physalus) in the Gulf of Maine. This outcome suggests Cr might be disrupting the health of fin whale populations. Indeed, Cr in acute (24 h) exposure does cause toxicity in fin whale cells. However, human cell culture data indicate prolonged exposures (120 h) induce a higher amount of toxicity compared to 24 h exposure due to an inhibition of homologous recombination repair. However, whether prolonged exposure causes similar outcomes in fin whale cells is unknown. OBJECTIVE Due to the importance of assessing prolonged exposure toxicity, this study focuses on characterizing acute and prolonged exposure of Cr(VI) in male and female fin whale cells. METHODS Cytotoxicity was measured by the clonogenic assay, also known as colony forming assay, which measures the ability of cells to proliferate and form colonies after the treatment. DNA double strand breaks were analyzed by neutral comet assay. Clastogenicity was measured using the chromosome aberration assay. Intracellular Cr levels were measured with Graphite Furnace Atomic Absorption Spectrometry (GFAAS) with Syngistix Software. RESULTS In this study, we demonstrate that particulate Cr(VI) induces cytotoxicity and genotoxicity in a treatment-dependent manner after 24 h and 120 h exposures. Cytotoxicity levels were generally low with relative survival above 64 %. DNA double strand break data and chromosome aberration data were elevated after a 24 h exposure, but decreased after a 120 h exposure. While cytotoxicity was similar after 24 h and 120 h exposures, less DNA double strand breaks and chromosomal instability occurred with prolonged exposure. CONCLUSION Particulate Cr(VI) is cytotoxic and genotoxic to fin whale cells after acute and prolonged exposures. The reduction of genotoxicity we have observed after 120 h exposure may be partly explained by lower intracellular Cr levels after 120 h. However, the decrease in intracellular levels is not reflected by a similar decrease in chromosome aberrations suggesting other mechanisms may be at play. Male fin whale cells appear to be more susceptible to the genotoxic effects of particulate Cr(VI) while female cells are less susceptible possibly due to increased cell death of damaged cells, but more work is needed to clarify if this outcome reflects a sex difference or interindividual variability. Overall, the study shows particulate Cr(VI) does induce toxicity at both acute and prolonged exposures in fin whales cells indicating Cr(VI) exposure is a health risk for this species.
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Affiliation(s)
- Idoia Meaza
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | - Rachel M Speer
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | - Jennifer H Toyoda
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | - Haiyan Lu
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | - Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | - Tayler J Croom-Perez
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States
| | | | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 500 S Preston St, Rm 1422, Louisville, KY, United States.
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Lam EK, Allen KN, Torres-Velarde JM, Vázquez-Medina JP. Functional Studies with Primary Cells Provide a System for Genome-to-Phenome Investigations in Marine Mammals. Integr Comp Biol 2020; 60:348-360. [PMID: 32516367 DOI: 10.1093/icb/icaa065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Marine mammals exhibit some of the most dramatic physiological adaptations in their clade and offer unparalleled insights into the mechanisms driving convergent evolution on relatively short time scales. Some of these adaptations, such as extreme tolerance to hypoxia and prolonged food deprivation, are uncommon among most terrestrial mammals and challenge established metabolic principles of supply and demand balance. Non-targeted omics studies are starting to uncover the genetic foundations of such adaptations, but tools for testing functional significance in these animals are currently lacking. Cellular modeling with primary cells represents a powerful approach for elucidating the molecular etiology of physiological adaptation, a critical step in accelerating genome-to-phenome studies in organisms in which transgenesis is impossible (e.g., large-bodied, long-lived, fully aquatic, federally protected species). Gene perturbation studies in primary cells can directly evaluate whether specific mutations, gene loss, or duplication confer functional advantages such as hypoxia or stress tolerance in marine mammals. Here, we summarize how genetic and pharmacological manipulation approaches in primary cells have advanced mechanistic investigations in other non-traditional mammalian species, and highlight the need for such investigations in marine mammals. We also provide key considerations for isolating, culturing, and conducting experiments with marine mammal cells under conditions that mimic in vivo states. We propose that primary cell culture is a critical tool for conducting functional mechanistic studies (e.g., gene knockdown, over-expression, or editing) that can provide the missing link between genome- and organismal-level understanding of physiological adaptations in marine mammals.
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Affiliation(s)
- Emily K Lam
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Kaitlin N Allen
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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Ni X, Wan L, Liang P, Zheng R, Lin Z, Chen R, Pei M, Shen Y. The acute toxic effects of hexavalent chromium on the liver of marine medaka (Oryzias melastigma). Comp Biochem Physiol C Toxicol Pharmacol 2020; 231:108734. [PMID: 32151776 DOI: 10.1016/j.cbpc.2020.108734] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 02/18/2020] [Accepted: 02/26/2020] [Indexed: 02/06/2023]
Abstract
Chromium is toxic to marine animals and can cause damage to many of their organs, including the liver. To test the toxicity of chromium on marine organisms, we exposed the liver of the marine medaka (Oryzias melastigma) with hexavalent chromium [Cr(VI)]. Our results show that Cr enrichment in the liver demonstrates a positive correlation to the exposure concentration. With the increase of Cr(VI) concentration, pathological changes including nuclear migration, cell vacuolization, blurred intercellular gap, nuclear condensation, become noticeable. To further study changes in gene expression in the liver after Cr(VI) exposure, we used RNA-seq to compare expression profiles before and after Cr(VI) exposure. After acute Cr(VI) exposure (2.61 mg/l) for 96 h, 5862 transcripts significantly changed. It is the first time that the PPAR pathway was found to respond sensitively to Cr(VI) exposure in fish. Finally, combined with other published study, we found that there may be some difference between Cr(VI) toxicity in seawater fish and freshwater fish, due to degree of oxidative stress, distribution patterns and detailed Cr(VI) toxicological mechanisms. Not only does our study explore the mechanisms of Cr(VI) toxicity on the livers of marine medaka, it also points out different Cr(VI) toxicity levels and potential mechanisms between seawater fish and freshwater fish.
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Affiliation(s)
- Xiaomin Ni
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen, Fujian 361005, China; Fudan University, Shanghai 200240, China.
| | - Lei Wan
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Bellastem Biotechnology Limited, Weifang, Shandong 261503, China
| | - Pingping Liang
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen, Fujian 361005, China
| | - Ruping Zheng
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen, Fujian 361005, China
| | - Zeyang Lin
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen, Fujian 361005, China
| | - Ruichao Chen
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; College of Urban and Environmental Sciences, Peking University, Beijing 100089, China
| | - Mengke Pei
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; School of Environmental Science & Engineering, Shanghai Jiao Tong University, 200240, China
| | - Yingjia Shen
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen University, Xiamen, Fujian 361005, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen, Fujian 361005, China.
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12
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Wise JP, Wise JTF, Wise CF, Wise SS, Zhu C, Browning CL, Zheng T, Perkins C, Gianios C, Xie H, Wise JP. Metal Levels in Whales from the Gulf of Maine: A One Environmental Health approach. CHEMOSPHERE 2019; 216:653-660. [PMID: 30391886 PMCID: PMC6319665 DOI: 10.1016/j.chemosphere.2018.10.120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 10/08/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
One Environmental Health has emerged as an important area of research that considers the interconnectedness of human, animal and ecosystem health with a focus on toxicology. The great whales in the Gulf of Maine are important species for ecosystem health, for the economies of the Eastern seaboard of the United States, and as sentinels for human health. The Gulf of Maine is an area with heavy coastal development, industry, and marine traffic, all of which contribute chronic exposures to environmental chemicals that can bioaccumulate in tissues and may gradually diminish an individual whale's or a population's fitness. We biopsied whales for three seasons (2010-2012) and measured the levels of 25 metals and selenium in skin biopsies collected from three species: humpback whales (Megaptera novaeangliae), fin whales (Balaenoptera physalus), and a minke whale (Balaenoptera acutorostrata). We established baseline levels for humpback and fin whales. Comparisons with similar species from other regions indicate humpback whales have elevated levels of aluminum, chromium, iron, magnesium, nickel and zinc. Contextualizing the data with a One Environmental Health approach finds these levels to be of potential concern for whale health. While much remains to understand what threats these metal levels may pose to the fitness and survival of these whale populations, these data serve as a useful and pertinent start to understanding the threat of pollution.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA; School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - James T F Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA; Department of Pharmacology and Nutritional Sciences, Division of Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Catherine F Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA; Program in Environmental and Molecular Toxicology, Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA
| | - Cairong Zhu
- West China School of Public Health, Sichuan University, No.17 Section 3, Renmin South Road, Chengdu, Sichuan, 610044, China
| | - Cynthia L Browning
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA; Department of Pathology and Laboratory Medicine, Brown University, Providence, RI 02912, USA
| | | | - Christopher Perkins
- Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT USA
| | - Christy Gianios
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA
| | - Hong Xie
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, University of Louisville, 505 S. Hancock St, Louisville, KY 40292, USA.
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13
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Yu X, Yu RQ, Gui D, Zhang X, Zhan F, Sun X, Wu Y. Hexavalent chromium induces oxidative stress and mitochondria-mediated apoptosis in isolated skin fibroblasts of Indo-Pacific humpback dolphin. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 203:179-186. [PMID: 30153559 DOI: 10.1016/j.aquatox.2018.08.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 08/14/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
The increasing gas emissions and industrial wastewater discharge of anthropogenic hexavalent chromium (Cr(VI)) have been growing health concerns to the high trophic level marine mammals. Our previous studies showed that Indo-Pacific humpback dolphin (Sousa chinensis), stranded on the Pearl River Estuary region, contained exceedingly high levels of Cr in their skin-tissues. Unfortunately, the molecular toxic mechanisms on this mammal are absent, limiting our understanding of the eco-physiological impacts of Cr(VI) on dolphins. Thus, the cytotoxicity effects of Cr(VI) were analyzed on fibroblasts we isolated from the skin of S. chinensis (ScSF). This study showed that Cr(VI) markedly inhibited the viability of ScSF cells via induction of apoptosis accompanied by an increase in the production of reactive oxygen species and the population of G2/M arrest or apoptotic sub-G1 phase cells, up-regulation of p53, and activation of caspase-3. Further investigation on intracellular mechanisms indicated that Cr(VI) induced depletion of mitochondrial membrane potential in cells through regulating the expression of anti-apoptotic (Bcl-2) and pro-apoptotic (Bax) proteins, resulting in decrease of the ATP level, cytochrome c release from mitochondria into cytosol, and the activation of caspase-9. Furthermore, antioxidants N-acetylcysteine and vitamin C displayed chemoprotective activity against Cr(VI) via suppression of p53 expression, indicating that the Cr(VI)-induced cell death may be mediated by oxidative stress. Overall, these results provide insights into the potential mechanisms underlying the cytotoxicity of Cr(VI) in Indo-Pacific humpback dolphin skin cells, offer experimental support for the proposed protective role of antioxidants in Cr(VI)-induced toxicity, and suggest that Cr(VI) contamination is one of key health concern issues for the protection of Indo-Pacific humpback dolphin.
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Affiliation(s)
- Xinjian Yu
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Ri-Qing Yu
- Department of Biology, University of Texas at Tyler, Tyler, TX 75799, USA
| | - Duan Gui
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Xiyang Zhang
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Fenping Zhan
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Xian Sun
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Yuping Wu
- Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.
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Husain N, Mahmood R. 3,4-Dihydroxybenzaldehyde quenches ROS and RNS and protects human blood cells from Cr(VI)-induced cytotoxicity and genotoxicity. Toxicol In Vitro 2018; 50:293-304. [DOI: 10.1016/j.tiv.2018.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 01/17/2023]
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Abstract
The One Environmental Health research approach, a subspecialty of the One Health initiative, focuses on toxic chemicals. Distinct disciplines work together to give a holistic perspective of a health concern through discrete disciplines, including, but not limited to, public health and the medical and veterinary sciences. In this article, we illustrate the concept of One Environmental Health with two case studies. One case study focuses on alligators and contributions to the field of endocrine disruption. The other case study focuses on whales and contributions to understanding carcinogenic metals. Both studies illustrate how the health of sentinel organisms has the potential to inform about the health of humans and the ecosystem.
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Affiliation(s)
- Adam Pérez
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, 505 S. Hancock Street, Louisville, KY 40292, USA
| | - John Pierce Wise Sr.
- Wise Laboratory of Environmental and Genetic Toxicology, Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, 505 S. Hancock Street, Louisville, KY 40292, USA
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Wang Y, Su H, Gu Y, Song X, Zhao J. Carcinogenicity of chromium and chemoprevention: a brief update. Onco Targets Ther 2017; 10:4065-4079. [PMID: 28860815 PMCID: PMC5565385 DOI: 10.2147/ott.s139262] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chromium has two main valence states: hexavalent chromium (Cr[VI]) and trivalent chromium (Cr[III]). Cr(VI), a well-established human carcinogen, can enter cells by way of a sulfate/phosphate anion-transport system, and then be reduced to lower-valence intermediates consisting of pentavalent chromium (Cr[V]), tetravalent chromium (Cr[IV]) or Cr(III) via cellular reductants. These intermediates may directly or indirectly result in DNA damage or DNA–protein cross-links. Although Cr(III) complexes cannot pass easily through cell membranes, they have the ability to accumulate around cells to induce cell-surface morphological alteration and result in cell-membrane lipid injuries via disruption of cellular functions and integrity, and finally to cause DNA damage. In recent years, more research, including in vitro, in vivo, and epidemiological studies, has been conducted to evaluate the genotoxicity/carcinogenicity induced by Cr(VI) and/or Cr(III) compounds. At the same time, various therapeutic agents, especially antioxidants, have been explored through in vitro and in vivo studies for preventing chromium-induced genotoxicity/carcinogenesis. This review aims to provide a brief update on the carcinogenicity of Cr(VI) and Cr(III) and chemoprevention with different antioxidants.
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Affiliation(s)
- Yafei Wang
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Hong Su
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Yuanliang Gu
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Xin Song
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Jinshun Zhao
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China.,Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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17
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Boroda AV. Marine mammal cell cultures: To obtain, to apply, and to preserve. MARINE ENVIRONMENTAL RESEARCH 2017; 129:316-328. [PMID: 28683932 DOI: 10.1016/j.marenvres.2017.06.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/28/2017] [Accepted: 06/28/2017] [Indexed: 06/07/2023]
Abstract
The world's oceans today have become a place for the disposal of toxic waste, which leads to the degradation of marine mammal habitats and populations. Marine mammal cell cultures have proven to be a multifunctional tool for studying the peculiarities of the cell physiology and biochemistry of these animals as well as the destructive effects of anthropogenic and natural toxicants. This review describes the sources of marine mammal live tissues and the methods required for establishing cell cultures, their use, and long-term storage. Approaches to conserving rare animal species by applying cell biology methodologies are also discussed.
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Affiliation(s)
- A V Boroda
- A.V. Zhirmunsky Institute of Marine Biology, National Scientific Center of Marine Biology, Far Eastern Branch of the Russian Academy of Sciences, 17 Palchevsky St., Vladivostok, 690041, Russia.
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Chandra S, Khatoon R, Pandey A, Saini S, Vimal D, Singh P, Chowdhuri DK. Dme-miR-314-3p modulation in Cr(VI) exposed Drosophila affects DNA damage repair by targeting mus309. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:360-369. [PMID: 26590872 DOI: 10.1016/j.jhazmat.2015.10.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 10/20/2015] [Accepted: 10/29/2015] [Indexed: 06/05/2023]
Abstract
microRNAs (miRNAs) as one of the major epigenetic modulators negatively regulate mRNAs at post transcriptional level. It was therefore hypothesized that modulation of miRNAs by hexavalent Chromium [Cr(VI)], a priority environmental chemical, can affect DNA damage. In a genetically tractable model, Drosophila melanogaster, role of maximally up-regulated miRNA, dme-miR-314-3p, on DNA damage was examined by exposing the third instar larvae to 5.0-20.0 μg/ml Cr(VI) for 24 and 48 h. mus309, a Drosophila homologue of human Bloom's syndrome and predicted as one of the potential targets of this miRNA, was confirmed as its target by 5'RLM-RACE assay. A significant down-regulation of mus309 was observed in dme-miR-314-3p overexpression strain (myo-gal4>UAS-miR-314-3p) as compared with that in parental strains (myo-gal4 and UAS-miR-314-3p) and in w(1118). A significant increase in DNA damage including double strand breaks generation was observed in exposed myo-gal4>UAS-miR-314 and mus309 mutants as compared with that in parental strain and in unexposed control. A significant down-regulation of cell cycle regulation genes (CycA, CycB and cdc2) was observed in these exposed genotypes. Collectively, the study demonstrates that dme-miR-314-3p can mediate the downregulation of repair deficient gene mus309 leading to increased DNA damage and cell cycle arrest in exposed organism which may affect Cr(VI) mediated carcinogenesis.
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Affiliation(s)
- Swati Chandra
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific Innovation & Research (AcSIR), CSIR-IITR Campus, Lucknow, India
| | - Rehana Khatoon
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Ashutosh Pandey
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Sanjay Saini
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Divya Vimal
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific Innovation & Research (AcSIR), CSIR-IITR Campus, Lucknow, India
| | - Pallavi Singh
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific Innovation & Research (AcSIR), CSIR-IITR Campus, Lucknow, India
| | - D Kar Chowdhuri
- Embryotoxicology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific Innovation & Research (AcSIR), CSIR-IITR Campus, Lucknow, India.
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Wise SS, Wise C, Xie H, Guillette LJ, Zhu C, Wise JP, Wise JP. Hexavalent chromium is cytotoxic and genotoxic to American alligator cells. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 171:30-6. [PMID: 26730726 PMCID: PMC4721530 DOI: 10.1016/j.aquatox.2015.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/02/2015] [Accepted: 12/10/2015] [Indexed: 05/03/2023]
Abstract
Metals are a common pollutant in the aquatic ecosystem. With global climate change, these levels are anticipated to rise as lower pH levels allow sediment bound metals to be released. The American alligator (Alligator mississippiensis) is an apex predator in the aquatic ecosystem and is considered a keystone species; as such it serves as a suitable monitor for localized pollution. One metal of increasing concern is hexavalent chromium (Cr(VI)). It is present in the aquatic environment and is a known human carcinogen and reproductive toxicant. We measured the cytotoxicity and genotoxicity of Cr(VI) in American alligator cells derived from scute tissue. We found that particulate and soluble Cr(VI) are both cytotoxic and genotoxic to alligator cells in a concentration-dependent manner. These data suggest that alligators may be used as a model for assessing the effects of environmental Cr(VI) contamination as well as for other metals of concern.
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Affiliation(s)
- Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA
| | - Catherine Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Program in Environmental and Molecular Toxicology, Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Hong Xie
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA
| | - Louis J Guillette
- Marine Biomedicine and Environmental Sciences Center, Medical University of South Carolina, USA
| | - Cairong Zhu
- Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu 610044, China
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Health Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
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20
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Young JL, Wise SS, Xie H, Zhu C, Fukuda T, Wise JP. Comparative cytotoxicity and genotoxicity of soluble and particulate hexavalent chromium in human and hawksbill sea turtle (Eretmochelys imbricata) skin cells. Comp Biochem Physiol C Toxicol Pharmacol 2015; 178:145-155. [PMID: 26440299 PMCID: PMC4669981 DOI: 10.1016/j.cbpc.2015.09.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/17/2015] [Accepted: 09/22/2015] [Indexed: 12/30/2022]
Abstract
Chromium is both a global marine pollutant and a known human health hazard. In this study, we compare the cytotoxicity and genotoxicity of both soluble and particulate chromate in human and hawksbill sea turtle (Eretmochelys imbricata) skin fibroblasts. Our data show that both soluble and particulate Cr(VI) induce concentration-dependent increases in cytotoxicity, genotoxicity, and intracellular Cr ion concentrations in both human and hawksbill sea turtle fibroblasts. Based on administered concentration, particulate and soluble Cr(VI) were more cytotoxic and clastogenic to human cells than sea turtle cells. When the analysis was based on the intracellular concentration of Cr, the data showed that the response of both species was similar. The one exception was the cytotoxicity of intracellular Cr ions from soluble Cr(VI), which caused more cytotoxicity in sea turtle cells (LC50=271μM) than that of human cells (LC50=471μM), but its clastogenicity was similar between the two species. Thus, adjusting for differences in uptake indicated that the explanation for the difference in potency was mostly due to uptake rather than differently affected mechanisms. Overall these data indicate that sea turtles may be a useful sentinel for human health responses to marine pollution.
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Affiliation(s)
- Jamie L Young
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA
| | - Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA
| | - Hong Xie
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA
| | - Cairong Zhu
- Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu 610044, China
| | - Tomokazu Fukuda
- Graduate School of Agricultural Sciences, Tohoku University, Laboratory of Animal Breeding and Genetics, Second Research Building, Rm112, 1-1 Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
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21
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Wise CF, Wise SS, Thompson WD, Perkins C, Wise JP. Chromium Is Elevated in Fin Whale (Balaenoptera physalus) Skin Tissue and Is Genotoxic to Fin Whale Skin Cells. Biol Trace Elem Res 2015; 166:108-17. [PMID: 25805270 PMCID: PMC4470778 DOI: 10.1007/s12011-015-0311-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022]
Abstract
Hexavalent chromium (Cr(VI)) is present in the marine environment and is a known carcinogen and reproductive toxicant. Cr(VI) is the form of chromium that is well absorbed through the cell membrane. It is also the most prevalent form in seawater. We measured the total Cr levels in skin biopsies obtained from healthy free-ranging fin whales from the Gulf of Maine and found elevated levels relative to marine mammals in other parts of the world. The levels in fin whale biopsies ranged from 1.71 to 19.6 μg/g with an average level of 10.07 μg/g. We also measured the cytotoxicity and genotoxicity of Cr(VI) in fin whale skin cells. We found that particulate and soluble Cr(VI) are both cytotoxic and genotoxic to fin whale skin cells in a concentration-dependent manner. The concentration range used in our cell culture studies used environmentally relevant concentrations based on the biopsy measurements. These data suggest that Cr(VI) may be a concern for whales in the Gulf of Maine.
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Affiliation(s)
- Catherine F. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - W. Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - Christopher Perkins
- Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
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22
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Wise SS, Xie H, Fukuda T, Douglas Thompson W, Wise JP. Hexavalent chromium is cytotoxic and genotoxic to hawksbill sea turtle cells. Toxicol Appl Pharmacol 2014; 279:113-8. [PMID: 24952338 PMCID: PMC4134996 DOI: 10.1016/j.taap.2014.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/30/2014] [Accepted: 06/08/2014] [Indexed: 11/20/2022]
Abstract
Sea turtles are a charismatic and ancient ocean species and can serve as key indicators for ocean ecosystems, including coral reefs and sea grass beds as well as coastal beaches. Genotoxicity studies in the species are absent, limiting our understanding of the impact of environmental toxicants on sea turtles. Hexavalent chromium (Cr(VI)) is a ubiquitous environmental problem worldwide, and recent studies show it is a global marine pollutant of concern. Thus, we evaluated the cytotoxicity and genotoxicity of soluble and particulate Cr(VI) in hawksbill sea turtle cells. Particulate Cr(VI) was both cytotoxic and genotoxic to sea turtle cells. Concentrations of 0.1, 0.5, 1, and 5μg/cm(2) lead chromate induced 108, 79, 54, and 7% relative survival, respectively. Additionally, concentrations of 0, 0.1, 0.5, 1, and 5μg/cm(2) lead chromate induced damage in 4, 10, 15, 26, and 36% of cells and caused 4, 11, 17, 30, and 56 chromosome aberrations in 100 metaphases, respectively. For soluble Cr, concentrations of 0.25, 0.5, 1, 2.5, and 5μM sodium chromate induced 84, 69, 46, 25, and 3% relative survival, respectively. Sodium chromate induced 3, 9, 9, 14, 21, and 29% of metaphases with damage, and caused 3, 10, 10, 16, 26, and 39 damaged chromosomes in 100 metaphases at concentrations of 0, 0.25, 0.5, 1, 2.5, and 5μM sodium chromate, respectively. These data suggest that Cr(VI) may be a concern for hawksbill sea turtles and sea turtles in general.
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Affiliation(s)
- Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - Hong Xie
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - Tomokazu Fukuda
- Graduate School of Agricultural Sciences, Tohoku University, Laboratory of Animal Breeding and Genetics, Second Research Building, Rm 112, 1-1 Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan.
| | - W Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
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Wise JP, Wise JTF, Wise C, Wise SS, Gianios C, Xie H, Thompson WD, Perkins C, Falank C, Wise JP. Concentrations of the genotoxic metals, chromium and nickel, in whales, tar balls, oil slicks, and released oil from the gulf of Mexico in the immediate aftermath of the deepwater horizon oil crisis: is genotoxic metal exposure part of the deepwater horizon legacy? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:2997-3006. [PMID: 24552566 PMCID: PMC3983321 DOI: 10.1021/es405079b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 01/25/2014] [Accepted: 02/05/2014] [Indexed: 05/31/2023]
Abstract
Concern regarding the Deepwater Horizon oil crisis has largely focused on oil and dispersants while the threat of genotoxic metals in the oil has gone largely overlooked. Genotoxic metals, such as chromium and nickel, damage DNA and bioaccumulate in organisms, resulting in persistent exposures. We found chromium and nickel concentrations ranged from 0.24 to 8.46 ppm in crude oil from the riser, oil from slicks on surface waters and tar balls from Gulf of Mexico beaches. We found nickel concentrations ranged from 1.7 to 94.6 ppm wet weight with a mean of 15.9 ± 3.5 ppm and chromium concentrations ranged from 2.0 to 73.6 ppm wet weight with a mean of 12.8 ± 2.6 ppm in tissue collected from Gulf of Mexico whales in the wake of the crisis. Mean tissue concentrations were significantly higher than those found in whales collected around the world prior to the spill. Given the capacity of these metals to damage DNA, their presence in the oil, and their elevated concentrations in whales, we suggest that metal exposure is an important understudied concern for the Deepwater Horizon oil disaster.
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Affiliation(s)
- John Pierce Wise
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - James T. F. Wise
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - Catherine
F. Wise
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - Sandra S. Wise
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - Christy Gianios
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - Hong Xie
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - W. Douglas Thompson
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
- Department
of Applied Medical Sciences, University
of Southern Maine, 96
Falmouth Street, P.O. Box 9300, Portland, Maine 04104-9300, United States
| | - Christopher Perkins
- Center
for Environmental Sciences and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Carolyne Falank
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
| | - John Pierce Wise
- Wise
Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04104, United States
- Maine
Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04101, United States
- Department
of Applied Medical Sciences, University
of Southern Maine, 96
Falmouth Street, P.O. Box 9300, Portland, Maine 04104-9300, United States
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Molecular cytogenetic characterization of the Amazon River dolphin Inia geoffrensis. Genetica 2012; 140:307-15. [PMID: 23010983 DOI: 10.1007/s10709-012-9680-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 09/08/2012] [Indexed: 10/27/2022]
Abstract
Classical and molecular cytogenetic (18S rDNA, telomeric sequence, and LINE-1 retrotransposon probes) studies were carried out to contribute to an understanding of the organization of repeated DNA elements in the Amazon River dolphin (boto, Inia geoffrensis). Twenty-seven specimens were examined, each presenting 2n = 44 chromosomes, the karyotype formula 12m + 14sm + 6st + 10t + XX/XY, and fundamental number (FN) = 74. C-positive heterochromatin was observed in terminal and interstitial positions, with the occurrence of polymorphism. Interstitial telomeric sequences were not observed. The nucleolar organizer region (NOR) was located at a single site on a smallest autosomal pair. LINE-1 was preferentially distributed in the euchromatin regions, with the greatest accumulation on the X chromosome. Although the karyotype structure in cetaceans is considered to be conserved, the boto karyotype demonstrated significant variations in its formula, heterochromatin distribution, and the location of the NOR compared to other cetacean species. These results contribute to knowledge of the chromosome organization in boto and to a better understanding of karyoevolution in cetaceans.
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Shakir L, Ejaz S, Ashraf M, Qureshi NA, Anjum AA, Iltaf I, Javeed A. Ecotoxicological risks associated with tannery effluent wastewater. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:180-191. [PMID: 22522427 DOI: 10.1016/j.etap.2012.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 02/08/2012] [Accepted: 03/03/2012] [Indexed: 05/31/2023]
Abstract
The problem of water pollution acquires greater relevance in the context of a developing agrarian economy like Pakistan. Even though, the leather industry is a leading economic sector in Pakistan, there is an increasing environmental concern regarding tanneries because they produce large amounts of potentially toxic wastewater containing both trivalent and hexavalent chromium, which are equally hazardous for human population, aquaculture and agricultural activities in the area. Therefore, we defined the scope of the present study as to employ different bioassays to determine the eco-toxic potential of tannery effluent wastewater (TW) and its chromium based components, i.e., potassium dichromate (K(2)Cr(2)O(7)) and chromium sulfate Cr(2)(SO(4))(3). Particle-induced X-ray emission (PIXE) analysis of TW was carried out to determine the concentration of chromium in TW and then equal concentrations of hexavalent (K(2)Cr(2)O(7)) and trivalent chromium Cr(2)(SO(4))(3) were obtained for this study. Cytotoxicity assay, artemia bioassay and phytotoxicity assay was utilized to investigate the eco-toxicological potential of different concentrations of TW, K(2)Cr(2)O(7) and Cr(2)(SO(4))(3). All the dilutions of TW, K(2)Cr(2)O(7) and Cr(2)(SO(4))(3) presented concentration dependent cytotoxic effects in these assays. The data clearly represents that among all three tested materials, different dilutions of K(2)Cr(2)O(7) caused significantly more damage (P<0.001) to vero cell, brine shrimp and germination of maize seeds. Interestingly, the overall toxicity effects of TW treated groups were subsequent to K(2)Cr(2)O(7) treated group. Based on biological evidences presented in this article, it is concluded that hexavalent chromium (K(2)Cr(2)O(7)) and TW has got significant eco-damaging potential clearly elaborating that environmental burden in district Kasur is numerous and high levels of chromium is posing a considerable risk to the human population, aquaculture and agricultural industry that can obliterate ecosystem surrounding the tanneries.
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Affiliation(s)
- Lubna Shakir
- Angiogenesis and Toxicology Research Laboratory, Department of Pharmacology & Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan; School of Pharmacy, Hajvery University, Lahore, Pakistan
| | - Sohail Ejaz
- Department of Clinical Neurosciences, Neurology Unit, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK.
| | - Muhammad Ashraf
- Angiogenesis and Toxicology Research Laboratory, Department of Pharmacology & Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan.
| | - Naureen Aziz Qureshi
- Department of Fisheries and Aquaculture, University of Veterinary and Animal Sciences, Lahore, Pakistan; Department of Fisheries and Aquaculture, Government College University, Faisalabad, Pakistan
| | - Aftab Ahmad Anjum
- Department of Microbiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Imran Iltaf
- Quality Operations Laboratory, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Aqeel Javeed
- Angiogenesis and Toxicology Research Laboratory, Department of Pharmacology & Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Li Chen T, LaCerte C, Wise SS, Holmes A, Martino J, Wise JP, Thompson WD, Wise JP. Comparative cytotoxicity and genotoxicity of particulate and soluble hexavalent chromium in human and sperm whale (Physeter macrocephalus) skin cells. Comp Biochem Physiol C Toxicol Pharmacol 2012; 155:143-50. [PMID: 21466859 PMCID: PMC4084666 DOI: 10.1016/j.cbpc.2011.03.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 03/27/2011] [Accepted: 03/28/2011] [Indexed: 11/21/2022]
Abstract
Chromium (Cr) is a global marine pollutant, present in marine mammal tissues. Hexavalent chromium [Cr(VI)] is a known human carcinogen. In this study, we compare the cytotoxic and clastogenic effects of Cr(VI) in human (Homo sapiens) and sperm whale (Physeter macrocephalus) skin fibroblasts. Our data show that increasing concentrations of both particulate and soluble Cr(VI) induce increasing amounts of cytotoxicity and clastogenicity in human and sperm whale skin cells. Furthermore, the data show that sperm whale cells are resistant to these effects exhibiting less cytotoxicity and genotoxicity than the human cells. Differences in Cr uptake accounted for some but not all of the differences in particulate and soluble Cr(VI) genotoxicity, although it did explain the differences in particulate Cr(VI) cytotoxicity. Altogether, the data indicate that Cr(VI) is a genotoxic threat to whales, but also suggest that whales have evolved cellular mechanisms to protect them against the genotoxicity of environmental agents such as Cr(VI).
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Affiliation(s)
- Tânia Li Chen
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
| | - Carolyne LaCerte
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773 USA
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773 USA
| | - Amie Holmes
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
| | - Julieta Martino
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773 USA
| | - W. Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104 USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773 USA
- Correspondence: Sr. Express Mail: 178 Science Building 96 Falmouth St. Portland, Maine 04103 Phone: (207) 228-8050; FAX: (207) 228-8518
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Doucette GJ, Mikulski CM, King KL, Roth PB, Wang Z, Leandro LF, DeGrasse SL, White KD, De Biase D, Gillett RM, Rolland RM. Endangered North Atlantic right whales (Eubalaena glacialis) experience repeated, concurrent exposure to multiple environmental neurotoxins produced by marine algae. ENVIRONMENTAL RESEARCH 2012; 112:67-76. [PMID: 22018895 DOI: 10.1016/j.envres.2011.09.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 09/12/2011] [Accepted: 09/21/2011] [Indexed: 05/31/2023]
Abstract
The western North Atlantic population of right whales (Eubalaena glacialis) is one of the most critically endangered of any whale population in the world. Among the factors considered to have potentially adverse effects on the health and reproduction of E. glacialis are biotoxins produced by certain microalgae responsible for causing harmful algal blooms. The worldwide incidence of these events has continued to increase dramatically over the past several decades and is expected to remain problematic under predicted climate change scenarios. Previous investigations have demonstrated that N. Atlantic right whales are being exposed to at least two classes of algal-produced environmental neurotoxins-paralytic shellfish toxins (PSTs) and domoic acid (DA). Our primary aims during this six-year study (2001-2006) were to assess whether the whales' exposure to these algal biotoxins occurred annually over multiple years, and to what extent individual whales were exposed repeatedly and/or concurrently to one or both toxin classes. Approximately 140 right whale fecal samples obtained across multiple habitats in the western N. Atlantic were analyzed for PSTs and DA. About 40% of these samples were attributed to individual whales in the North Atlantic Right Whale Catalog, permitting analysis of biotoxin exposure according to sex, age class, and reproductive status/history. Our findings demonstrate clearly that right whales are being exposed to both of these algal biotoxins on virtually an annual basis in multiple habitats for periods of up to six months (April through September), with similar exposure rates for females and males (PSTs: ∼70-80%; DA: ∼25-30%). Notably, only one of 14 lactating females sampled did not contain either PSTs or DA, suggesting the potential for maternal toxin transfer and possible effects on neonatal animals. Moreover, 22% of the fecal samples tested for PSTs and DA showed concurrent exposure to both neurotoxins, leading to questions of interactive effects. Targeted studies employing both in vivo and in vitro model systems represent the next logical step in assessing how and to what extent these algal biotoxins might compromise the health and reproduction of this endangered population.
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Affiliation(s)
- Gregory J Doucette
- Marine Biotoxins Program, NOAA/National Ocean Service, Charleston, SC 29412, USA.
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Establishment and characterization of fibroblast cell lines from the skin of the Yangtze finless porpoise. In Vitro Cell Dev Biol Anim 2011; 47:618-30. [DOI: 10.1007/s11626-011-9448-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2011] [Accepted: 08/18/2011] [Indexed: 10/17/2022]
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Re: Toxic effects of various pollutants in 11B7501 lymphoma B cell line from harbour seal (Phoca vitulina). Toxicology 2011; 285:81-2. [PMID: 21497639 DOI: 10.1016/j.tox.2011.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Wise JP, Wise SS, LaCerte C, Wise JP, Aboueissa AM. The genotoxicity of particulate and soluble chromate in sperm whale (physeter macrocephalus) skin fibroblasts. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2011; 52:43-9. [PMID: 20839228 PMCID: PMC4966527 DOI: 10.1002/em.20579] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Hexavalent chromium is a marine pollutant of concern, both for the health of ocean ecosystems and for public health. Hexavalent chromium is known to induce genotoxicity in human and other terrestrial mammals. It is also known to be present in both water and air in the marine environment. However, currently there are limited data concerning both chromium levels and its toxicological effects in marine mammals. This study investigated the cytotoxic and genotoxic effects of soluble and particulate hexavalent chromium in sperm whale skin fibroblasts. Both forms of hexavalent chromium induced concentration-dependent increases in cytotoxicity and genotoxicity indicating that these compounds can be a health risk if the whales are exposed to them. These data support a hypothesis that chromium is a concern in the marine environment in general and for the health of sperm whales in particular.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine
- Department of Applied Medical Science, University of Southern Maine, Portland, Maine
- Ocean Alliance, Lincoln, Massachusetts
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine
- Department of Applied Medical Science, University of Southern Maine, Portland, Maine
- Ocean Alliance, Lincoln, Massachusetts
| | - Carolyne LaCerte
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine
- Department of Applied Medical Science, University of Southern Maine, Portland, Maine
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine
- Ocean Alliance, Lincoln, Massachusetts
| | - AbouEl-Makarim Aboueissa
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine
- Department of Mathematics and Statistics, University of Southern Maine, Portland, Maine
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Wise JP, Wise SS, Holmes AL, LaCerte C, Shaffiey F, Aboueissa AM. The cytotoxicity and genotoxicity of hexavalent chromium in Steller sea lion lung fibroblasts compared to human lung fibroblasts. Comp Biochem Physiol C Toxicol Pharmacol 2010; 152:91-8. [PMID: 20211760 PMCID: PMC2862134 DOI: 10.1016/j.cbpc.2010.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2009] [Revised: 02/28/2010] [Accepted: 03/02/2010] [Indexed: 10/19/2022]
Abstract
In this study we directly compared soluble and particulate chromate cytotoxicity and genotoxicity in human (Homo sapiens) and sea lion (Eumetopias jubatus) lung fibroblasts. Our results show that hexavalent chromium induces increased cell death and chromosome damage in both human and sea lion cells with increasing intracellular chromium ion levels. The data further indicate that both sodium chromate and lead chromate are less cytotoxic and genotoxic to sea lion cells than human cells, based on an administered dose. Differences in chromium ion uptake explained some but not all of the reduced amounts of sodium chromate-induced cell death. By contrast, uptake differences could explain the differences in sodium chromate-induced chromosome damage and particulate chromate-induced toxicity. Altogether they indicate that while hexavalent chromium induces similar toxic effects in sea lion and human cells, there are different mechanisms underlying the toxic outcomes.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, P.O. Box 9300, 96 Falmouth St. Portland, ME 04104-9300, USA.
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Chen TL, Wise SS, Holmes A, Shaffiey F, Wise JP, Thompson WD, Kraus S, Wise JP. Cytotoxicity and genotoxicity of hexavalent chromium in human and North Atlantic right whale (Eubalaena glacialis) lung cells. Comp Biochem Physiol C Toxicol Pharmacol 2009; 150:487-94. [PMID: 19632355 PMCID: PMC4048704 DOI: 10.1016/j.cbpc.2009.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Revised: 07/15/2009] [Accepted: 07/18/2009] [Indexed: 11/26/2022]
Abstract
Humans and cetaceans are exposed to a wide range of contaminants. In this study, we compared the cytotoxic and genotoxic effects of a metal pollutant, hexavalent chromium [Cr(VI)], which has been shown to cause damage in lung cells from both humans and North Atlantic right whales. Our results show that Cr induces increased cell death and chromosome damage in lung cells from both species with increasing intracellular Cr ion levels. Soluble Cr(VI) induced less of a cytotoxic and genotoxic effect based on administered dose in right whale (Eubalaena glacialis) cells than in human (Homo sapiens) cells. Whereas, particulate Cr(VI) induced a similar cytotoxic effect but less of a genotoxic effect based on administered dose in right whale cells than in human cells. Differences in chromium ion uptake explained soluble chromate-induced cell death but not all of the soluble chromate-induced chromosome damage. Uptake differences of lead ions could explain the differences in particulate chromate-induced toxicity. The data show that both forms of Cr(VI) are less genotoxic to right whale than human lung cells, and that soluble Cr(VI) induces a similar cytotoxic effect in both right whale and human cells, while particulate Cr(VI) is more cytotoxic to right whale lung cells.
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Affiliation(s)
- Tânia Li Chen
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Amie Holmes
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Fariba Shaffiey
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - W. Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Scott Kraus
- New England Aquarium, Edgerton Research Laboratory, Central Wharf, Boston, MA 02110, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- New England Aquarium, Edgerton Research Laboratory, Central Wharf, Boston, MA 02110, USA
- Mystic Aquarium, 55 Coogan Blvd., Mystic, CT 06355, USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773, USA
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Wise JP, Payne R, Wise SS, LaCerte C, Wise J, Gianios C, Thompson WD, Perkins C, Zheng T, Zhu C, Benedict L, Kerr I. A global assessment of chromium pollution using sperm whales (Physeter macrocephalus) as an indicator species. CHEMOSPHERE 2009; 75:1461-1467. [PMID: 19324391 DOI: 10.1016/j.chemosphere.2009.02.044] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 02/12/2009] [Accepted: 02/14/2009] [Indexed: 05/27/2023]
Abstract
Chromium (Cr) is a well-known human carcinogen and a potential reproductive toxicant, but its contribution to ocean pollution is poorly understood. The aim of this study was to provide a global baseline for Cr as a marine pollutant using the sperm whale (Physeter macrocephalus) as an indicator species. Biopsies were collected from free-ranging whales around the globe during the voyage of the research vessel The Odyssey. Total Cr levels were measured in 361 sperm whales collected from 16 regions around the globe detectable levels ranged from 0.9 to 122.6 microg Cr g tissue(-1) with a global mean of 8.8+/-0.9 microg g(-1). Two whales had undetectable levels. The highest levels were found in sperm whales sampled in the waters near the Islands of Kiribati in the Pacific (mean=44.3+/-14.4) and the Seychelles in the Indian Ocean (mean=19.5+/-5.4 microg g(-1)). The lowest mean levels were found in whales near the Canary Islands (mean=3.7+/-0.8 microg g(-1)) and off of the coast of Sri Lanka (mean=3.3+/-0.4 microg g(-1)). The global mean Cr level in whale skin was 28-times higher than mean Cr skin levels in humans without occupational exposure. The whale levels were more similar to levels only observed previously in human lung tissue from workers who died of Cr-induced lung cancer. We conclude that Cr pollution in the marine environment is significant and that further study is urgently needed.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, United States.
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Li Chen T, Wise SS, Kraus S, Shaffiey F, Levine KM, Thompson WD, Romano T, O'Hara T, Wise JP. Particulate hexavalent chromium is cytotoxic and genotoxic to the North Atlantic right whale (Eubalaena glacialis) lung and skin fibroblasts. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2009; 50:387-393. [PMID: 19230002 DOI: 10.1002/em.20471] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Hexavalent chromium compounds are present in the atmosphere and oceans and are established mutagens and carcinogens in human and terrestrial mammals. However, the adverse effects of these toxicants in marine mammals are uncertain. Previously, we reported that North Atlantic right whales, one of the most endangered great whales, have tissue chromium levels that are high, levels that may pose a risk to the whale's health. Furthermore, the study suggested that inhalation may be an important exposure route. Exposure to chromium through inhalation is mainly because of particulate compounds. However, the toxicity of particulate chromium compounds in marine mammal cells is unknown. Accordingly, in this study, we tested the cytotoxic and genotoxic effects of particulate hexavalent chromium in primary cultured lung and skin fibroblasts from the endangered North Atlantic right whale. Cytotoxicity was measured by clonogenic survival assay, and genotoxicity was measured as production of chromosome aberrations. Particulate hexavalent chromium induced cytotoxicity and genotoxicity in a concentration-dependent manner in both right whale lung and skin fibroblasts. Lung fibroblasts were more resistant to chromium cytotoxicity, but presented with more chromosome damage than skin fibroblasts. These data further support the hypothesis that chromium may be a health concern for the endangered North Atlantic right whale.
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Affiliation(s)
- Tânia Li Chen
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, Maine 04103, USA
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Wise SS, Shaffiey F, LaCerte C, Goertz CEC, Dunn JL, Gulland FMD, Aboueissa AM, Zheng T, Wise JP. Particulate and soluble hexavalent chromium are cytotoxic and genotoxic to Steller sea lion lung cells. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2009; 91:329-335. [PMID: 19157580 DOI: 10.1016/j.aquatox.2008.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 11/26/2008] [Accepted: 12/02/2008] [Indexed: 05/27/2023]
Abstract
Hexavalent chromium is an environmental contaminant. Within the environment, marine waters are a common site for hexavalent chromium deposition. We have recently reported significantly high levels of chromium in skin tissue from North Atlantic right whales. These findings demonstrate that marine species are being exposed to chromium. It is possible that such exposures may be playing a role in population declines evident among certain marine mammals, such as the Steller sea lion. We developed a Steller sea lion lung cell line from Steller sea lion lung tissue. Hexavalent chromium was cytotoxic to these primary lung fibroblasts as 1, 2.5, 5, 10 and 25microM sodium chromate induced 104, 99, 92, 58 and 11% relative survival, respectively. It was also genotoxic as 0, 1, 2.5, 5 and 10microM sodium chromate damaged chromosomes in 6, 11, 21, 36, and 39% of metaphases and damaged 6, 12, 27, 49 and 57 total aberrations in 100 metaphases, respectively. We also considered the toxicity of particulate hexavalent chromium, as it is the more potent carcinogen in humans. We found that 0.1, 0.5, 1, 5 and 10microg/cm(2) particulate chromate induced 95, 88, 91, 70, and 52% relative cell survival, respectively. These concentrations were genotoxic and damaged chromosomes in 9, 13, 18, and 23% of metaphases and induced 9, 15, 20 and 30 total aberrations per 100 metaphases, respectively. These data indicate that if sufficiently exposed, chromium may adversely affect the struggling Steller sea lion population. It would be prudent to investigate the effects chromium has in other Steller sea lion organs in order to derive a better understanding of how chromium in the marine environment may be affecting the declining Steller sea lion population.
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Affiliation(s)
- Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Portland, ME 04104, USA
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Wise JP, Wise SS, Goodale BC, Shaffiey F, Kraus S, Walter RB. Medaka (Oryzias latipes) as a sentinel species for aquatic animals: Medaka cells exhibit a similar genotoxic response as North Atlantic right whale cells. Comp Biochem Physiol C Toxicol Pharmacol 2009; 149:210-4. [PMID: 18930840 PMCID: PMC4524507 DOI: 10.1016/j.cbpc.2008.09.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 09/29/2008] [Accepted: 09/29/2008] [Indexed: 11/21/2022]
Abstract
Hexavalent chromium (Cr(VI)) is emerging as a major concern for aquatic environments, particularly marine environments. Medaka (Oryzias latipes) has been used as a model species for human and aquatic health, including the marine environment, though few studies have directly compared toxicological responses in medaka to humans or other aquatic species. We used a medaka fin cell line to compare the genotoxic response of medaka to Cr(VI) to the response observed in North Atlantic right whale cells to see if responses in medaka were similar to those of other aquatic species, particularly aquatic mammals. We used the production of chromosomal aberrations as a measure of genotoxicity. We found that in medaka cells, concentrations of 1, 5 and 10 microM sodium chromate damaged 17, 32 and 43% of metaphases, respectively and these same concentrations 1, 2.5, 5 and 10 microM sodium chromate damaged 14, 24 and 49% of metaphases, respectively, in North Atlantic right whale lung cells and 11, 32 and 41% of metaphases, respectively, in North Atlantic right whale testes cells. These data show that genotoxic responses in medaka are comparable to those seen in North Atlantic right whale cells, consistent with the hypothesis that medaka are a useful model for other aquatic species.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104, USA.
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Ierardi JL, Mancia A, McMillan J, Lundqvist ML, Romano TA, Wise JP, Warr GW, Chapman RW. Sampling the skin transcriptome of the North Atlantic right whale. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2009; 4:154-8. [PMID: 20403765 DOI: 10.1016/j.cbd.2009.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2008] [Revised: 01/20/2009] [Accepted: 01/20/2009] [Indexed: 10/21/2022]
Abstract
As an initial step in defining the transcriptome of the North Atlantic right whale (Eubalaena glacialis) and developing functional genomic tools to study right whale health at the molecular physiological level, a cDNA library has been constructed from a skin biopsy. 2496 randomly selected clones (expressed sequence tags, ESTs) have been sequenced, and genes identified as important in the response to stress and immune challenges have been cloned by targeted RT-PCR from skin cDNA. The analysis of the EST collection (archived at www.marinegenomics.org and GenBank) showed a 34.79% redundancy, yielding 1578 unigenes and 27 potential microsatellite markers. 96 genes were cloned by targeted PCR; moreover, 52 of these genes are stress and immune function related. A Gene Ontology analysis of the unigene collection indicates that the skin is a rich source of expressed genes with diverse functions, suggesting an important role in multiple physiological processes including those related to immunity and stress response.
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Affiliation(s)
- Jessalyn L Ierardi
- Graduate Program of Marine Biology, College of Charleston, 205 Fort Johnson Rd, Charleston, SC 29412, USA
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