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Xia Y, Li S, Wang X, Zhao B, Chen S, Jiang Q, Xu S, Li S. Astilbin targeted Sirt1 to inhibit acetylation of Nrf2 to alleviate grass carp hepatocyte apoptosis caused by PCB126-induced mitochondrial kinetic and metabolism dysfunctions. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109000. [PMID: 37597642 DOI: 10.1016/j.fsi.2023.109000] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/21/2023]
Abstract
3, 3', 4, 4', 5-pentachlorobiphenyl (PCB126) is extensively utilized in electronic products, lubricant, and insecticide due to its excellent chemical stability and insulation prosperity, resulting in its frequent detection in environment. In addition, atmospheric deposition, as well as industrial and urban wastewater discharge can also lead to PCB126 contamination in marine environment, triggering damages to the tissues of aquatic organisms through oxidative stress. Astilbin is a type of flavonoid compound found in plants that plays a crucial role in providing powerful antioxidant and anti-inflammatory properties. In this study, we aimed to investigate the specific mechanism of PCB126-induced damage and the potential protective effect of Astilbin. To achieve this, we treated grass carp hepatocytes (L8824) with 75 μM PCB126 and/or 0.5 mM Astilbin for 24 h and used experimental methods such as Flow cytometry, molecular docking, PPI analysis, detection of commercial kits (ATP concentration and ATPnase activity) and measurement of mitochondrial membrane potential (ΔΨm). Our findings revealed that PCB126 exposure resulted in a decrease in expression levels of Sirt1, factors related to mitochondrial fusion (Opa1, Mfn1, and Mfn2), antioxidant (CAT, SOD1, and SOD2), energy metabolism (PKM2, IDH, and SDH) and anti-apoptosis (Bcl-2), and an increase in expression levels of Nrf2 acetylation, mitochondrial fission (Drp1), factors that promote apoptosis (Cytc, Bax, Cas9, and Cas3) in L8824 cells. Furthermore, our findings revealed a decrease in ΔΨm, ATP concentration and ATPnase activity and apoptosis levels in L8824 cells. Noteworthy, treatment with Astilbin reversed these results. Molecular docking provides solid evidence for the interaction between Astilbin and Sirt1. In summary, our findings suggested that Astilbin promoted the deacetylation of Nrf2 by interacting with Sirt1, thereby alleviating PCB126-induced mitochondrial apoptosis mediated by mitochondrial dynamics imbalance and energy metabolism disorder through the inhibition of oxidative stress in L8824 cells. Our research has initially revealed the correlation between acetylation and apoptosis induced by PCB126, which provided a foundation for a better comprehension of PCB126 toxicity. Additionally, it expanded the potential application value of Astilbin.
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Affiliation(s)
- Yu Xia
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shanshan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xixi Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Bing Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shasha Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Qihang Jiang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
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Monnolo A, Clausi MT, Del Piano F, Santoro M, Fiorentino ML, Barca L, Fusco G, Degli Uberti B, Ferrante L, Mercogliano R, Ferrante MC. Do Organochlorine Contaminants Modulate the Parasitic Infection Degree in Mediterranean Trout ( Salmo trutta)? Animals (Basel) 2023; 13:2961. [PMID: 37760361 PMCID: PMC10526105 DOI: 10.3390/ani13182961] [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: 07/03/2023] [Revised: 08/23/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
We investigated the occurrence of organochlorine pollutants (OCs) in the muscle of brown trout and evaluated their potential modulation of parasite infection. The toxicological risk for consumer health was assessed, too. Trout were collected from the Sila National Park (Calabria region, South of Italy). The highest concentrations emerged for the sum of the 6 non-dioxin-like (ndl) indicator polychlorinated biphenyls (Σ6ndl-PCBs), followed by the 1,1,1-trichloro-2,2-di(4-chlorophenyl)-ethane (DDT), dioxin-like PCBs, hexachlorobenzene (HCB), and dieldrin. Measured on lipid weight (LW), the mean value of Σ6ndl-PCBs amounted to 201.9 ng g-1, that of ΣDDTs (the sum of DDT-related compounds) to 100.2 ng g-1, with the major contribution of the DDT-metabolite p,p'-DDE which was detected in all sample units (97.6 ng g-1 on average). Among dioxin-like congeners, PCB 118 showed the highest mean concentration (21.96 ng g-1 LW) and was detected in all sample units. Regression analysis of intestinal parasites on OC concentration was performed, controlling for two potential confounding factors, namely sex and sexual stage. The results evidenced the existence of interactions between the dual stressors in the host-parasite system in the wild. A negative and statistically significant correlation was estimated, suggesting that OCs may decrease parasite infection degree. Regarding the toxicological risk evaluation, OC concentrations were consistently below the current European Maximum Residue Limits.
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Affiliation(s)
- Anna Monnolo
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy; (A.M.); (F.D.P.); (R.M.)
| | - Maria Teresa Clausi
- Experimental Zooprophylactic Institute of Southern Italy, Calabria Section, 88100 Catanzaro, Italy;
| | - Filomena Del Piano
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy; (A.M.); (F.D.P.); (R.M.)
| | - Mario Santoro
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, 80121 Naples, Italy;
| | - Maria Lorena Fiorentino
- Environmental Research Center, Istituti Clinici Scientifici Maugeri IRCCS, 27100 Pavia, Italy;
| | - Lorella Barca
- Experimental Zooprophylactic Institute of Southern Italy, Calabria Section, 87100 Cosenza, Italy;
| | - Giovanna Fusco
- Experimental Zooprophylactic Institute of Southern Italy, 80055 Portici, Italy; (G.F.); (B.D.U.)
| | - Barbara Degli Uberti
- Experimental Zooprophylactic Institute of Southern Italy, 80055 Portici, Italy; (G.F.); (B.D.U.)
| | - Luigia Ferrante
- Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy;
| | - Raffaelina Mercogliano
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy; (A.M.); (F.D.P.); (R.M.)
| | - Maria Carmela Ferrante
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy; (A.M.); (F.D.P.); (R.M.)
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Oros M, Barčák D, Miklisová D, Uhrovič D, Brázová T. A fish-parasite sentinel system in an assessment of the spatial distribution of polychlorinated biphenyls. Sci Rep 2023; 13:5164. [PMID: 36997612 PMCID: PMC10063543 DOI: 10.1038/s41598-023-31939-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/20/2023] [Indexed: 04/01/2023] Open
Abstract
The spatial distribution of polychlorinated biphenyls (PCBs), in the Zemplínska Šírava water reservoir and adjacent tributaries in the Bodrog River Basin were investigated using a fish-parasite sentinel system. PCB concentrations were detected in various fish matrices (dorsal and abdominal muscles, liver and intestine) of the Wels catfish (Silurus glanis) and its intestinal cestode Glanitaenia osculata. PCB concentrations in the fish from the water reservoir, located closest to the chemical plant, the primary source of the PCB pollution, were the highest. The analysis of these contaminants in catfish matrices showed the highest concentrations in the abdominal muscle, followed by the dorsal muscle, liver and intestine. Concentrations of ∑PCBs exceeding the limits for food set by European regulations were measured in the muscle tissue of catfish at all sites, even in the Bodrog River, 60 km away from the primary source of contamination, posing a significant risk to humans in the Zemplín region. For the first time, the ability of cestode G. osculata to accumulate higher amounts of PCBs compared to fish matrices has been demonstrated. Due to the enormous ability of the parasites to accumulate PCBs, we recommend this approach for alternative biomonitoring of PCBs in contaminated aquatic environments.
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Affiliation(s)
- Mikuláš Oros
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia
| | - Daniel Barčák
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia
| | - Dana Miklisová
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia
| | - Dalibor Uhrovič
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia
| | - Tímea Brázová
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia.
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4
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Li Z, Qin H, Zhang Y, He X, Bao X, Sun G, Cui C, Xu X, Liu X, Yang J, Zhang G. Transcriptome analysis preliminary reveals the immune response mechanism of golden cuttlefish (Sepia esculenta) larvae exposed to Cd. FISH & SHELLFISH IMMUNOLOGY 2023; 132:108494. [PMID: 36565999 DOI: 10.1016/j.fsi.2022.108494] [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: 10/12/2022] [Revised: 11/18/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
As a well-known marine metal element, Cd can significantly affect bivalve mollusk life processes such as growth and development. However, the effects of Cd on the molecular mechanisms of the economically important cephalopod species Sepia esculenta remain unclear. In this study, S. esculenta larval immunity exposed to Cd is explored based on RNA-Seq. The analyses of GO, KEGG, and protein-protein interaction (PPI) network of 1,471 differentially expressed genes (DEGs) reveal that multiple immune processes are affected by exposure such as inflammatory reaction and cell adhesion. Comprehensive analyses of KEGG signaling pathways and the PPI network are first used to explore Cd-exposed S. esculenta larval immunity, revealing the presence of 16 immune-related key and hub genes involved in exposure response. Results of gene and pathway functional analyses increase our understanding of Cd-exposed S. esculenta larval immunity and improve our overall understanding of mollusk immune functions.
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Affiliation(s)
- Zan Li
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Huimin Qin
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Yining Zhang
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaohua He
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaokai Bao
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Guohua Sun
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Cuiju Cui
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaohui Xu
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiumei Liu
- College of Life Sciences, Yantai University, Yantai, 264005, China
| | - Jianmin Yang
- School of Agriculture, Ludong University, Yantai, 264025, China.
| | - Guoguang Zhang
- School of Agriculture, Ludong University, Yantai, 264025, China; Laizhou Marine Development and Fishery Service Center, Yantai, 261499, China.
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Hybridization between Anguillicola crassus and A. novaezelandiae, and viability of the F1 generation. J Helminthol 2022; 96:e22. [PMID: 35300740 DOI: 10.1017/s0022149x22000104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
For decades, it has remained unclear how the Asian swim bladder nematode Anguillicola crassus was able to supplant the previously stable population of its relative from New Zealand Anguillicola novaezelandiae in the Lake Bracciano, Italy. Previously, researchers have hypothesized that A. crassus possesses an ecological advantage due to a more efficient life cycle in combination with a pattern of unidirectional hybridization between A. novaezelandiae females and A. crassus males. The present study focuses on the viability of hybrid offspring and their allelic pattern, particularly in developed adult stages of the hybrid F1 generation. While the percentages of hybrid individuals from A. novaezelandiae mothers and A. crassus fathers increased from egg to adult stages, it was more distinct in egg stages of A. crassus females and A. novaezelandiae males, but did not occur in adult F1 individuals at all. Therefore, we corroborate the hypothesis of unidirectional hybridization by differentiating between egg and adult stages, and suggest this as another explanatory factor for the extinction of A. novaezelandiae in Lake Bracciano in Italy and the predominance of A. crassus.
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Cary TL, Karasov WH. Larval Exposure to Polychlorinated Biphenyl-126 Led to a Long-Lasting Decrease in Immune Function in Postmetamorphic Juvenile Northern Leopard Frogs, Lithobates pipiens. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:81-94. [PMID: 34807990 DOI: 10.1002/etc.5233] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 10/01/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
Amphibian populations are decreasing worldwide, and pollution is a contributing factor. Polychlorinated biphenyls (PCBs) are a class of persistent organic pollutants known to exert immunotoxicity. To assess impacts of PCBs on frogs, we exposed Lithobates pipiens tadpoles to a diet of PCB-126 (0-5 ng PCB-126/g wet food) through metamorphic climax. Postmetamorphic frogs were immunized with keyhole limpet hemocyanin (KLH); then production of KLH-specific IgY, as well as total IgY and IgM, was measured (Trial I). A second larval study (0 and 7.3 ng PCB-126/g wet food) was performed to investigate whether PCB altered antigenic responses in prometamorphic tadpoles (Gosner Stage 36-39), and to measure the innate immune response of postmetamorphic frogs (Trial II). After larval PCB-126 exposure, both KLH-specific IgY levels and complement activity were reduced. Because postmetamorphic frogs carried a body burden of PCB-126 (2.4 ng/g or less), we wanted to determine whether the effect on immune response was due to larval exposure or to the resulting body burden as frogs. To test this, we reared tadpoles under control conditions (no PCB), and limited PCB exposure to postmetamorphosis only by injecting 2-week-old frogs with 10 ng PCB-126/g (Trial III). The resulting body burden (3.4 ng/g) was similar to that of frogs in Trial I, but we no longer detected suppression of KLH-specific IgY or hemolytic activity. These results suggest life-stage-specific immune responses; however, because we administered PCB-126 differently between trials, it is premature to conclude that these differences are intrinsically life stage dependent, and further study is warranted. Regardless, our study demonstrated a long-lasting effect of larval PCB-126 exposure that persisted through metamorphosis and suppressed frog immunity. Environ Toxicol Chem 2022;41:81-94. © 2021 SETAC.
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Affiliation(s)
- Tawnya L Cary
- Department of Zoology, University of Wisconsin, Madison, Wisconsin, USA
- Department of Biology, Beloit College, Beloit, Wisconsin, USA
| | - William H Karasov
- Department of Zoology, University of Wisconsin, Madison, Wisconsin, USA
- Department of Forest & Wildlife Ecology, University of Wisconsin, Madison, Wisconsin, USA
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7
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Honka KI, Sures B. Mutual adaptations between hosts and parasites determine stress levels in eels. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2021; 14:179-184. [PMID: 33898218 PMCID: PMC8056127 DOI: 10.1016/j.ijppaw.2021.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/02/2021] [Accepted: 02/02/2021] [Indexed: 12/02/2022]
Abstract
Invasive parasites may severely affect their new hosts. Two invasive parasites occurring in the European eel (Anguilla anguilla) are the Asian swim bladder nematode Anguillicola crassus and the Ponto-caspian acanthocephalan Pomphorhynchus sp., which were introduced to the river Rhine in the early 1980/90s. The Japanese eel (Anguilla japonica), as the native host of A. crassus, developed mutual adaptations to the swim bladder parasite, which are lacking in the European eel. Therefore, after its spread to Europe, infestations of European eels with A. crassus were found to be more severe and caused massive swim bladder wall damages mainly due to the feeding activity of the adult nematodes. A suppression of the immune system also appears to be likely, which allows secondary infections e.g. by bacteria or other parasites in European eels. Acanthocephalans of the genus Pomphorhynchus have not been described so far in Japanese eels, in contrast to European eels, which regularly show infestations with Pomphorhynchus sp. By using these differentially adapted host-parasite associations for experimental studies, host stress responses were examined in the present study in relation to the degree of mutual adaptations between eel hosts and parasites. Under laboratory conditions, Japanese and European eels were each inoculated with A. crassus and Pomphorhynchus sp., respectively, to investigate their stress responses against differently adapted parasites. The stress response was determined by analyzing plasma levels of cortisol, which is the main corticosteroid hormone during stress response of fish. The results show a strong cortisol release in European eels after infestation with A. crassus whereas Japanese eels only react against Pomphorhynchus sp. infestations. These results are consistent with the initial hypothesis that a low degree of host-parasite adaptations lead to stronger host stress responses against the parasite. We measured cortisol as the main corticosteroid hormone in fish. Japanese and European eels were inoculated with A. crassus and Pomphorhynchus sp. Lower mutual adaptations lead to a higher stress response in host-parasite-systems.
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Affiliation(s)
- K I Honka
- Aquatic Ecology, University of Duisburg-Essen, D-45141, Universitätsstr. 5, Germany
| | - B Sures
- Aquatic Ecology, University of Duisburg-Essen, D-45141, Universitätsstr. 5, Germany.,Center for Water and Environmental Research, University of Duisburg-Essen, D-45141, Universitätsstr. 5, Germany
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8
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Monnolo A, Clausi MT, Mercogliano R, Fusco G, Fiorentino ML, Buono F, Lama A, Ferrante MC. Levels of polychlorinated biphenyls and organochlorine pesticides in donkey milk: Correlation with the infection level by intestinal strongyles. CHEMOSPHERE 2020; 258:127287. [PMID: 32535446 DOI: 10.1016/j.chemosphere.2020.127287] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 06/11/2023]
Abstract
AIM The study aimed at evaluating the concentration levels of organochlorine pollutants in donkey milk and their modulation on the intestinal strongyle infection. Risk evaluation for consumer health was also investigated. METHODS We analyzed milk of grazing donkeys living in areas of Southern of Italy affected by organochlorine compounds environmental pollution and parasite infection. The presence of pollutants was assessed through summary statistics; regression analysis of intestinal strongyle on pollutant concentration was performed to investigate the relationship between the two variables. RESULTS PCB concentrations (mainly non-dioxin-like (ndl)-PCBs) were higher than OCP ones. Mean values of ndl-PCBs across areas ranged from 93.13 to 263.64 ng g-1. In all sample units we detected the six indicator PCBs with the prevalence of the PCB 153, followed by the PCB 28 and the PCB 101. Among the dioxin-like (dl)-PCBs, non-ortho PCB 169, 77 and 126 were assessed in some milk samples; in all areas we detected the mono-ortho PCB 118 and PCB 105. Positive correlation between infection level and six indicator PCBs as well as between the former and HCB, on WW and LW, were observed (at least statistically significant at 5 percent). In some cases, Dl-PCB concentrations emerged as dangerous given the EU maximum residue limit for PCDD/Fs and dl-PCBs. CONCLUSION Evidence supports the hypothesis of an immunosuppressive role of organochlorine pollutants; risk evaluation reveals the potential health impact of dl-PCB intake, particularly for major donkey milk consumers such as infants, children with cow milk and multiple food intolerance, and elders.
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Affiliation(s)
- A Monnolo
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - M T Clausi
- Experimental Zooprophylactic Institute of Southern Italy, Portici, Naples, Italy
| | - R Mercogliano
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - G Fusco
- Experimental Zooprophylactic Institute of Southern Italy, Portici, Naples, Italy
| | - M L Fiorentino
- Environmental Research Center, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - F Buono
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - A Lama
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - M C Ferrante
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy.
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Muñoz P, Barcala E, Peñalver J, Romero D. Can inorganic elements affect herpesvirus infections in European eels? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:35266-35269. [PMID: 31728943 DOI: 10.1007/s11356-019-06617-6] [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: 07/04/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
In combination, pollution and pathogens represent a serious threat to the health of European eels that has been increasingly recognized. Thus, the impact of contaminants, cadmium, lead, mercury, and selenium, on anguillid herpesvirus 1 infection in wild European eels has been evaluated. Despite the small sample size, results indicate that selenium and mercury concentrations may compromise the European eel immune system as herpesvirus infection was more prevalent in specimens with higher Hg and Se hepatic concentrations.
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Affiliation(s)
- Pilar Muñoz
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, 30100, Murcia, Spain.
- Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Murcia, Spain.
| | - Elena Barcala
- Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Murcia, Spain
- Instituto Español de Oceanografía, C/ Varadero, s/n, 30740, San Pedro del Pinatar, Spain
| | - José Peñalver
- Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Murcia, Spain
- Servicio de Pesca y Acuicultura, Consejería de Agua, Agricultura, Ganadería y Pesca, CARM. C/ Campos, 4, 30201, Cartagena, Spain
- Área de Toxicología, Universidad de Murcia, Campus de Espinardo, 30100, Murcia, Spain
| | - Diego Romero
- Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Murcia, Spain
- Área de Toxicología, Universidad de Murcia, Campus de Espinardo, 30100, Murcia, Spain
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Yada T, Mekuchi M, Ojima N. Molecular biology and functional genomics of immune-endocrine interactions in the Japanese eel, Anguilla japonica. Gen Comp Endocrinol 2018; 257:272-279. [PMID: 29108728 DOI: 10.1016/j.ygcen.2017.11.001] [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: 01/05/2017] [Revised: 10/03/2017] [Accepted: 11/02/2017] [Indexed: 10/18/2022]
Abstract
Immune-endocrine interactions are an important pathogen resistance mechanism in fish. We review the immune-endocrine interactions in the Japanese eel, Anguilla japonica, with special reference to high throughput gene sequencing. These data may be relevant to the significant decrease in the eel harvest in recent years and will aid in the selection of appropriate disease-resistant strains for aquaculture. More than 1000 sequences that whose expression in elvers responded to air exposure were identified through comprehensive gene expression analysis using next-generation sequencing. These included transcription factors within the MAPK pathway. Significant changes in expression after air exposure were detected by quantitative polymerase chain reaction analysis in many genes related to disease resistance. These factors include innate immune system factors and cytokines that interact with the endocrine system during the stress response. Other applications of immune-endocrine interactions in eel culture are discussed.
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Affiliation(s)
- Takashi Yada
- Freshwater Fisheries Research Center, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Nikko, Japan.
| | - Miyuki Mekuchi
- Research Center for Bioinformatics and Biosciences, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama, Japan
| | - Nobuhiko Ojima
- Research Center for Bioinformatics and Biosciences, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama, Japan
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11
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Aalberg K, Koščová L, Šmiga Ľ, Košuth P, Koščo J, Oros M, Barčák D, Lazar P. A Study of Fish Lice (Argulus Sp.) Infection in Freshwater Food Fish. FOLIA VETERINARIA 2016. [DOI: 10.1515/fv-2016-0030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Argulus sp., commonly referred to as fish lice, are crustacean ectoparasites of fishes. The hematophagous parasites attach to and feed off the integument of their hosts. Outbreaks of epizootics have been reported worldwide, causing mass mortalities and having serious economic implications for fish farms and culture efforts. Argulus fish lice may also serve as vectors of infectious diseases and as intermediate hosts of other parasites. Two native European species, A. foliaceus and A. coregoni, as well as the invasive Japanese fish louse A. japonicus, have previously been recorded in Slovakia. This study investigated samples collected at fish farms and culture sites of Common carp (Cyprinus carpio L.), Pike-perch (Sander lucioperca L.) and Brook trout (Salvelinus fontinalis M.) in Eastern Slovakia, as well as samples collected from live fish imported to the Slovak Republic. A quantitative description of the of Argulus sp. was recorded from each locality. Samples from Common carp were identified as the invasive A. japonicus, and samples from Pike-perch and Brook trout were identified as A. foliaceus. Evidence of a mixed infection of Pike-perch with both A. foliaceus and A. japonicus was found in samples from Zemplínska Šírava, which was substantiated by electron microscopic examination. Morphometric characteristics were measured and averages and ranges produced for each species and sex.
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Affiliation(s)
- K. Aalberg
- Department of Breeding and Diseases of Game and Fish, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice
| | - L. Koščová
- Department of Breeding and Diseases of Game and Fish, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice
| | - Ľ. Šmiga
- Department of Breeding and Diseases of Game and Fish, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice
| | - P. Košuth
- Department of Breeding and Diseases of Game and Fish, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice
| | - J. Koščo
- University of Prešov, Faculty of Human and Natural Sciences, 080 01 Prešov, The Slovakia Republic
| | - M. Oros
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 040 01 Košice, The Slovakia Republic
| | - D. Barčák
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 040 01 Košice, The Slovakia Republic
| | - P. Lazar
- Department of Breeding and Diseases of Game and Fish, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice
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Berg V, Kraugerud M, Nourizadeh-Lillabadi R, Olsvik PA, Skåre JU, Alestrøm P, Ropstad E, Zimmer KE, Lyche JL. Endocrine effects of real-life mixtures of persistent organic pollutants (POP) in experimental models and wild fish. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2016; 79:538-548. [PMID: 27484136 DOI: 10.1080/15287394.2016.1171980] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A series of studies have assessed the occurrence, levels, and potential adverse effects of persistent organic pollutants (POP) in fish from Lake Mjøsa. In this lake, high levels of various POP were detected in biota. Fish from the nearby Lake Losna contain background levels of POP and served as reference (controls) in these studies. Significantly higher prevalence of mycobacteriosis and pathological changes were documented in burbot (Lota lota) from Mjøsa compared to burbot from Losna. Further, transcriptional profiling identified changes in gene expression in burbot from Mjøsa compared to burbot from Losna associated with drug metabolism enzymes and oxidative stress. POP extracted from burbot liver oil from the two lakes was used to expose zebrafish (Danio rerio) during two consecutive generations. During both generations, POP mixtures from both lakes increased the rate of mortality, induced earlier onset of puberty, and skewed sex ratio toward males. However, opposite effects on weight gain were found in exposure groups compared to controls during the two generations. Exposure to POP from both lakes was associated with suppression of ovarian follicle development. Analyses of genome-wide transcription profiling identified functional networks of genes associated with weight homeostasis, steroid hormone functions, and insulin signaling. In human cell studies using adrenocortical H295R and primary porcine theca and granulosa cells, exposure to lake extracts from both populations modulated steroid hormone production with significant difference from controls. The results suggest that POP from both lakes may possess the potential to induce endocrine disruption and may adversely affect health in wild fish.
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Affiliation(s)
- Vidar Berg
- a Department of Food Safety and Infection Biology , Norwegian University of Life Sciences , Oslo , Norway
| | - Marianne Kraugerud
- b Department of Basic Sciences and Aquatic Medicine , Norwegian University of Life Sciences , Oslo , Norway
| | | | - Pål A Olsvik
- c National Institute of Nutrition and Seafood Research , Bergen , Norway
| | | | - Peter Alestrøm
- b Department of Basic Sciences and Aquatic Medicine , Norwegian University of Life Sciences , Oslo , Norway
| | - Erik Ropstad
- e Department of Production Animal Clinical Sciences , Norwegian University of Life Sciences , Oslo , Norway
| | - Karin Elisabeth Zimmer
- b Department of Basic Sciences and Aquatic Medicine , Norwegian University of Life Sciences , Oslo , Norway
| | - Jan L Lyche
- a Department of Food Safety and Infection Biology , Norwegian University of Life Sciences , Oslo , Norway
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Jürgens MD, Chaemfa C, Hughes D, Johnson AC, Jones KC. PCB and organochlorine pesticide burden in eels in the lower Thames River (UK). CHEMOSPHERE 2015; 118:103-111. [PMID: 25078785 DOI: 10.1016/j.chemosphere.2014.06.088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 06/24/2014] [Accepted: 06/28/2014] [Indexed: 06/03/2023]
Abstract
Thirty-five European eels (Anguilla anguilla), caught in 2007 in the river Thames upstream and downstream of both London and the tidal limit, were analysed for PCBs and organochlorine pesticides. Most chemicals were detectable in every fish, although they have been banned or severely restricted for many years. In general, the tidal eels were more contaminated than upstream ones, which was related to their higher lipid contents. The ICES7 indicator PCB concentrations ranged overall from 4.2 to 124μgkg(-1) fresh weight with averages of 33 and 56μgkg(-1) for the upstream and tidal eels; 3.5-104μgkg(-1), average 26 and 48μgkg(-1) of that were ICES6 PCBs. Total DDT was on average 16μgkg(-1) (1.7-38μgkg(-1)) upstream and 18μgkg(-1) (8.6-35μgkg(-1)) downstream with about half of that provided by pp'DDE. Lindane (γ-HCH) was found at up to 2.8μgkg(-1) (averages 0.58 and 1.1μgkg(-1) upstream and downstream) and hexachlorobenzene (HCB) was on average 1.9 and 2.5μgkg(-1) in the two groups with a maximum of 6.4μgkg(-1) in each. Therefore all individuals passed the European Environmental Quality Standard (EQS) of 10μgkg(-1) for HCB. PCB contamination was fairly typical for recent UK eel data, whilst DDE and lindane concentrations were lower than most previous UK eel studies, perhaps reflecting a downward trend. Although not as highly contaminated as some eels from previous UK and European studies, the presence of so many of these chemicals, with their known health effects may represent a stress for the fish or higher predators, such as birds.
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Affiliation(s)
| | - Chakra Chaemfa
- Lancaster Environment Centre, Lancaster University, LA1 4YQ, United Kingdom; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Wushan, Tianhe District, Guangzhou, GD 510640, China
| | - David Hughes
- Lancaster Environment Centre, Lancaster University, LA1 4YQ, United Kingdom
| | | | - Kevin C Jones
- Lancaster Environment Centre, Lancaster University, LA1 4YQ, United Kingdom
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Effects of Anguillicola novaezelandiae on the levels of cortisol and hsp70 in the European eel. Parasitol Res 2014; 113:3817-22. [DOI: 10.1007/s00436-014-4049-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 07/23/2014] [Indexed: 10/25/2022]
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15
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Yen Le TT, Rijsdijk L, Sures B, Hendriks AJ. Accumulation of persistent organic pollutants in parasites. CHEMOSPHERE 2014; 108:145-151. [PMID: 24582601 DOI: 10.1016/j.chemosphere.2014.01.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 01/17/2014] [Accepted: 01/25/2014] [Indexed: 06/03/2023]
Abstract
Organisms are simultaneously exposed to various stressors, including parasites and pollutants, that may interact with each other. Research on the accumulation of organic compounds in host-parasite systems is scant compared to studies on parasite-metal interactions and mainly focuses on intestinal endoparasites. We reviewed factors that determine the accumulation of persistent organic pollutants (POPs) in host-parasite systems. The wet/dry weight-based concentration of POPs in these parasites is usually lower than that in host tissues because of lower lipid contents in the parasites. However, the fractionation of the pollutants into parasites and their hosts may vary, depending on developmental stages in the life cycle of the parasites. Developmental stages determine the trophic relationship and the taxon of the parasite in the host-parasite systems because of different feeding strategies between the stages. Lipid-corrected concentrations of organic chemicals in the host are usually higher than those in the endoparasites studied. This phenomenon is attributed to a number of physiological and behavioural processes, such as feeding selectivity and strategy and excretion. Moreover, no significant relationship was found between the accumulation factor (i.e. the ratio between the lipid-corrected concentrations in parasites and in their hosts) for polychlorinated biphenyls and either hydrophobicity or molecular size. At the intermediate hydrophobicity, larger and more lipophilic compounds are accumulated at higher levels in both parasites and the host than smaller and less lipophilic compounds. The bioaccumulation of POPs in parasites is affected by some other abiotic, e.g. temperature, and biotic factors, e.g. the number of host species infected by parasites.
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Affiliation(s)
- T T Yen Le
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, The Netherlands.
| | - Laurie Rijsdijk
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, The Netherlands
| | - Bern Sures
- Department of Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University of Duisburg Essen, Germany
| | - A Jan Hendriks
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, The Netherlands
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16
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Keppel M, Dangel KC, Sures B. Comparison of infection success, development and swim bladder pathogenicity of two congeneric Anguillicola species in experimentally infected Anguilla anguilla and A. japonica. Parasitol Res 2014; 113:3727-35. [PMID: 25070578 DOI: 10.1007/s00436-014-4038-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 07/11/2014] [Indexed: 10/25/2022]
Abstract
Two closely related parasites, Anguillicola crassus and Anguillicola novaezelandiae, originally parasitizing swim bladders of the Japanese eel (Anguilla japonica and the Short-finned eel (Anguilla australis), respectively, were used for analyzing the infection success of each parasite species on either long-known, recently acquired or new definitive host species and the associated effects on the eels' swim bladders. On that account, European eels (Anguilla anguilla) and Japanese eels were experimentally infected with both Anguillicola species in the laboratory. Susceptibility of the two eel species to both parasite species was determined by analyses of infection data. Subsequently, histopathological effects of the nematodes on the hosts' swim bladders were characterized according to already established indices.The present study revealed significant differences between the four different host-parasite systems regarding recovery rates, infrapopulations, and damage levels. Both nematode species achieved significantly lower recovery rates in Japanese eels than in European eels, since the examined swim bladders of Japanese eels contained a high amount of dead encapsulated larvae, whereas those of European eels contained only living nematodes. Encapsulation of larvae in Japanese eels was associated with a distinct thickening of the swim bladder walls. The swim bladders of uninfected Japanese eels turned out to be generally thicker than those of European eels. Infection with both Anguillicola species resulted in a further thickening process of the swim bladder walls in Japanese eels, whereas those of European eels showed only minor changes. The two established classification systems turned out to be inapplicable, since the measurements and the macroscopic evaluations of the swim bladders of the two infected eel species did not entirely correspond to the underlying criteria.
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Affiliation(s)
- M Keppel
- Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141, Essen, Germany,
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17
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Can differences in life cycle explain differences in invasiveness? - A study on Anguillicola novaezelandiae in the European eel. Parasitology 2013; 140:1831-6. [PMID: 23953638 DOI: 10.1017/s0031182013001327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Anguillicola crassus is the most invasive species of its genus and it is a successful colonizer of different eel species worldwide. It is so far the only species of the genus Anguillicola whose life cycle has been studied completely. To analyse whether differences in life cycle may explain differences in invasiveness, we infected European eels with Anguillicola novaezelandiae under laboratory conditions. Anguillicola novaezelandiae shows a synchronized development in the European eel. Eggs with second-stage larvae appeared 120 days after infection. No density-dependent effect in parasite development could be found for A. novaezelandiae. The present study shows that the life cycle of A. novaezelandiae differs on final host level compared with A. crassus in ways which result in a less successful invasion of new host species.
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Lorin-Nebel C, Felten V, Blondeau-Bidet E, Grousset E, Amilhat E, Simon G, Biagianti S, Charmantier G. Individual and combined effects of copper and parasitism on osmoregulation in the European eel Anguilla anguilla. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 130-131:41-50. [PMID: 23340332 DOI: 10.1016/j.aquatox.2012.11.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 11/19/2012] [Accepted: 11/22/2012] [Indexed: 06/01/2023]
Abstract
The European eel (Anguilla anguilla), a catadromous species, breeds in the sea and migrates to estuarine, lagoon or freshwater habitats for growth and development. Yellow eels, exposed to low or fluctuating salinities, are also exposed to multiple other stressors as pollution, over-fishing and parasitism, which contribute to the dramatic decrease of eel populations in several European countries. The objective of this study was to evaluate the single and combined effects of waterborne copper and experimental infestation of eels with the nematode Anguillicoloides crassus after a salinity challenge from nearly isotonic (18ppt) to hypo- (5ppt) and hypertonic (29ppt) conditions, in order to investigate the osmoregulatory capacity of eels exposed to these stressors. In a nearly isotonic condition (18ppt), blood osmolality remained constant over the 6 weeks contamination to Cu(2+) and Anguillicoloides crassus. In fish exposed to a salinity challenge of 29ppt for 2 weeks, no significant effect was recorded in blood osmolality, Na(+)/K(+)-ATPase (NKA) activity, Na(+) and Cl(-) concentrations. After 2 weeks at 5ppt however, a significant blood osmolality decrease was detected in fish exposed to Anguillicoloides crassus infestation with or without Cu(2+) addition. This decrease may originate from lower Cl(-) levels measured in eels exposed to both stressors. Blood Na(+) levels remained relatively stable in all tested animals, but gill NKA activities were lower in eels exposed to combined stress. No apparent branchial lesions were detected following the different treatments and immunolocalization of NKA revealed well-differentiated ionocytes. Thus, the 5ppt challenge in eels exposed to copper and Anguillicoloides crassus seems to clearly enhance iono/osmoregulatory disturbances. Funded by ANR CES/CIEL 2008-12.
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Affiliation(s)
- Catherine Lorin-Nebel
- Equipe Adaptation Ecophysiologique et Ontogenèse, UMR 5119 EcoSym (UM2, UM1, CNRS, IRD, IFREMER), Montpellier, France.
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19
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Berg V, Zerihun MA, Jørgensen A, Lie E, Dale OB, Skaare JU, Lyche JL. High prevalence of infections and pathological changes in burbot (Lota lota) from a polluted lake (Lake Mjøsa, Norway). CHEMOSPHERE 2013; 90:1711-1718. [PMID: 23149183 DOI: 10.1016/j.chemosphere.2012.10.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 08/24/2012] [Accepted: 10/17/2012] [Indexed: 06/01/2023]
Abstract
The aim of the present study was to investigate whether exposure to high levels of persistent organic pollutants (POPs) affected a fish population in Lake Mjøsa. Lake Mjøsa is known to be contaminated by polybrominated diphenyl ethers (PBDEs), a subgroup of brominated flame retardants from local industrial activities. Fish from Lake Losna, a less contaminated lake located close to Lake Mjøsa, was used as reference (control). The sampling of burbot (Lota lota) was carried out between 2005 and 2008. Hepatic levels of POPs were analysed in burbot from the two lakes, and the fish were examined for bacterial- and parasite infection and histopathological changes. The levels of polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethanes (DDTs), and PBDEs were about 10, 15 and 300 times higher in fish from Lake Mjøsa compared to fish from Lake Losna. Mycobacterium salmoniphilum was present in 7% and 35% of the fish from Lake Losna and Lake Mjøsa respectively. Significantly higher number of external and visceral macroscopic lesions, histopathological diffuse changes and granulomas were seen in fish from Lake Mjøsa compared to Lake Losna. Furthermore the parasite infection was higher and the hepatic lipid content was significantly lower in burbot from Lake Mjøsa. The results of the present study suggest that the high level of contamination in Lake Mjøsa could have a negative impact on the health status of wild fish inhabiting the lake.
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Affiliation(s)
- Vidar Berg
- Norwegian School of Veterinary Science, Oslo, Norway.
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20
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Quadroni S, Galassi S, Capoccioni F, Ciccotti E, Grandi G, De Leo GA, Bettinetti R. Contamination, parasitism and condition of Anguilla anguilla in three Italian stocks. ECOTOXICOLOGY (LONDON, ENGLAND) 2013; 22:94-108. [PMID: 23076840 DOI: 10.1007/s10646-012-1006-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/02/2012] [Indexed: 06/01/2023]
Abstract
In conjunction with habitat loss and overfishing, pollution and parasitism are believed to be relevant causes of collapse of Anguilla, as these can affect eel swimming ability and the development of gonads and embryos. The present study investigated Persistent Organic Pollutant (POP) concentrations, infection levels of Anguillicoloides crassus, lipid content and gonad abnormalities in eels sampled in 2007-2008 in three Italian water bodies (Caprolace Lake, Lesina Lagoon and Tevere River) that vary in salinity, trophic condition, contamination level and fishing pressure. Our analysis revealed that low-to-moderate levels of contamination and parasitism were not associated with gonad abnormalities in Caprolace Lake and Lesina Lagoon. On the contrary, POP concentrations and abundances of swim bladder nematodes were remarkably high in eels from the heavily urbanized Tevere River and were associated with significant gonad and swim bladder alterations. Contamination and infestation levels were so high to potentially impair spawner successful migration and reproduction. POP concentrations in Tevere eels also exceeded levels considered safe for food consumption. Though marginally contaminated, eels from the oligotrophic Caprolace Lake were in critical health condition: their lipid reserve was so low as to be considered insufficient to sustain the energetic costs of the transoceanic migration. Lesina eel stock was the only one displaying relatively good quality but here spawner abundance is likely limited by overfishing. Our results suggest that multiple stressors may potentially affect eel reproductive success. More definitive studies are needed to assess whether health effects caused by these multiple stressors are additive, compensatory or synergistic.
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Affiliation(s)
- Silvia Quadroni
- Department of Theoretical and Applied Sciences (Environmental Section), University of Insubria, Via Dunant 3, 21100, Varese, Italy.
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21
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Grabner DS, Dangel KC, Sures B. Merging species? Evidence for hybridization between the eel parasites Anguillicola crassus and A. novaezelandiae (Nematoda, Anguillicolidea). Parasit Vectors 2012; 5:244. [PMID: 23111012 PMCID: PMC3495632 DOI: 10.1186/1756-3305-5-244] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 10/29/2012] [Indexed: 11/10/2022] Open
Abstract
Background The eel parasitic nematodes Anguillicola crassus (originating from Asia) and Anguillicola novaezelandiae (originating from New Zealand) were both introduced to Europe, but occurred in sympatry only in Lake Bracciano in Italy, where they both infected the European eel (Anguilla anguilla). A. novaezelandiae was introduced to the lake in 1975 and disappeared soon after A. crassus was also found there in 1993. We tested the hypothesis if hybridization of the two species might be an explanation for the findings at Lake Bracciano. Findings After laboratory infection of one European eel with 10 third stage larvae of each parasite, two living female and 4 male adults of each species were found to co-occur in the swim bladder after 222 days post exposure. In 9 out of 17 eggs, isolated in total from uteri of the two A. novaezelandiae females, alleles were detected by microsatellite analysis that are characteristic for A. crassus, suggesting the hybrid origin of these eggs. In contrast, none of the eggs isolated from A. crassus females possessed alleles different from those found in A. crassus adults, but it was revealed that one female can be inseminated by several males. Conclusion Our results show that A. crassus and A. novaezelandiae can co-infect a single eel and can mature together in the same swim bladder. We also provide evidence for the possibility of hybridization of A. crassus males with A. novaezelandiae females. Therefore, hybridization might be an explanation for the disappearance of A. novaezelandiae from Lake Bracciano.
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Affiliation(s)
- Daniel S Grabner
- University of Duisburg-Essen, Aquatic Ecology, Universitaetsstr, 5, Essen, 45141, Germany.
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Brázová T, Hanzelová V, Miklisová D. Bioaccumulation of six PCB indicator congeners in a heavily polluted water reservoir in Eastern Slovakia: tissue-specific distribution in fish and their parasites. Parasitol Res 2012; 111:779-86. [DOI: 10.1007/s00436-012-2900-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 03/19/2012] [Indexed: 11/29/2022]
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Geeraerts C, Belpaire C. The effects of contaminants in European eel: a review. ECOTOXICOLOGY (LONDON, ENGLAND) 2010; 19:239-266. [PMID: 19806452 DOI: 10.1007/s10646-009-0424-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/18/2009] [Indexed: 05/28/2023]
Abstract
European eel (Anguilla anguilla (L.)) stocks are in decline in most of their geographical distribution and their status is considered below safe biological limits. Recently, there is an increasing awareness that spawner quality might be an essential element in the decline of the species since pollution by bioaccumulating chemical substances may have a large impact on the reproduction success of the eel. This review gives an overview of the literature on the effects of contaminants on the European eel and on the consequences on the biology and fitness of the eel in order to document the role of pollution in its decline. A variety of contaminants have been found to affect the eel. These contaminants may cause disturbance of the immune system, the reproduction system, the nervous system and the endocrine system and effects were reported on several levels of biological organization, from subcellular, organ, individual up to even population level. More extensive research is needed in order to evaluate how pollutants are detrimental to eel populations. Getting a comprehensive overview of the quality (including contamination levels, biomarker responses, lipid content and condition) of the silver eel population all over Europe seems to be an essential and urgent objective for the European eel management.
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Affiliation(s)
- Caroline Geeraerts
- Research Institute for Nature and Forest, Duboislaan 14, 1560, Groenendaal-Hoeilaart, Belgium.
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24
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Ferrante MC, Clausi MT, Meli R, Fusco G, Naccari C, Lucisano A. Polychlorinated biphenyls and organochlorine pesticides in European eel (Anguilla anguilla) from the Garigliano River (Campania region, Italy). CHEMOSPHERE 2010; 78:709-716. [PMID: 20022354 DOI: 10.1016/j.chemosphere.2009.11.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 11/17/2009] [Accepted: 11/18/2009] [Indexed: 05/28/2023]
Abstract
Measuring organochlorine compounds in muscle tissue of European eels from the Garigliano River in Campania (Italy), overall PCBs emerged as the most abundant pollutants, followed by DDTs, Dieldrin and HCB. Target PCBs, IUPAC nos. 118, 138, 153 and 180, were the dominant congeners accounting for 64.2% of total PCBs. Among OCPs, p,p'-DDE was detected in all eels, always with higher concentration levels than other OCPs; p,p'-DDT was frequently detected, about 93.3% of the sample. The high and statistically significant correlations between concentration and length as well as weight of eels suggest that the organochlorine compounds concentrations tend to increase with the size and consequently with the age. Concentrations of DDTs and PCBs detected were similar to those reported in studies relative to France, UK and Sweden. As regards toxicological risk for human health, in general OCPs residual levels were below the limits established for fish and aquatic products. Conversely, the concentrations of PCBs exceeded the limit set by the EU for terrestrial foods. Our results imply that OCPs and PCBs are still important persistent chemical contaminants in Campania freshwaters, although their manufacture and use are banned or highly restricted.
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Affiliation(s)
- Maria Carmela Ferrante
- University of Naples Federico II, Faculty of Veterinary Medicine, Department of Pathology and Animal Health, Toxicology Sector, Via Delpino 1, 80137 Naples, Italy.
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Fazio G, Moné H, Mouahid G, Sasal P. Biased Sex Ratio in the European Eel (Anguilla anguilla) Swim-Bladder Parasite Anguillicola crassus, Experimentally Induced by 11-Ketotestosterone. J Parasitol 2008; 94:956-8. [DOI: 10.1645/ge-1486.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Accepted: 12/06/2007] [Indexed: 11/10/2022] Open
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Triebskorn R, Telcean I, Casper H, Farkas A, Sandu C, Stan G, Colărescu O, Dori T, Köhler HR. Monitoring pollution in River Mureş, Romania, part II: metal accumulation and histopathology in fish. ENVIRONMENTAL MONITORING AND ASSESSMENT 2008; 141:177-88. [PMID: 17876715 DOI: 10.1007/s10661-007-9886-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Accepted: 08/17/2007] [Indexed: 05/17/2023]
Abstract
As a part of an exposure and effect monitoring conducted along the river Mureş, Western Romania in 2004, the health status of two indigenous fish species, sneep (Chondrostoma nasus) and European chub (Leuciscus cephalus) was investigated upstream and downstream the city of Arad. In fish, histopathology was assessed in liver and gills, and heavy metals (cadmium, copper, lead and zinc) were analyzed in liver samples. In both fish species, histopathological reactions in the gills (epithelial lifting, focal proliferation of epithelial cells of primary and secondary lamellae and resulting fusion of secondary lamellae, hyperplasia and hypertrophy of mucous cells, focal inflammation and necrosis of epithelial cells) were most severe at the two sampling sites upstream Arad city, which were shown to be polluted by copper, cadmium, faecal coliforms and streptococci in a parallel study. At these two sites, also histopathology in the liver of L. cephalus was more prominent than at the two downstream sites. In C. nasus, symptoms in the liver (focal inflammation with lymphocytic infiltrations, macrophage aggregates and single cell necrosis) were also highly pronounced at the sampling site located directly downstream the municipal sewage treatment plant of Arad. With the exception of copper accumulation in L. cephalus caught at the most upstream sampling site, in both fish species cadmium and copper accumulation were exceptionally high and did not differ significantly between the four sampling sites.
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Affiliation(s)
- Rita Triebskorn
- Steinbeis-Transfer Center for Ecotoxicology and Ecophysiology, Blumenstr. 13, 72108 Rottenburg, Germany.
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Abstract
Although 63 and 55 species of helminths have been reported from each species of Atlantic eel and from 29 to 19 for each species of Pacific eel only the monogeneans Pseudodactylogyrus bini and P. anguillae and the nematode Anguillicola crassus, originally specific to species of Pacific eels, can be considered serious pathogens. None of the three are normally pathogenic to their preferred natural eel host species in the wild. Pseudodactylogyrus spp. only cause serious local gill damage when present on a host in large numbers under optimal conditions that facilitate transmission. This is the case in eel aquaculture, where infections can be controlled by drugs. Anguillicola crassus is only pathogenic to Anguilla anguilla and A. rostrata when Atlantic eels are introduced to the far east or when the parasites have been introduced to Europe. Here the parasite life cycle differs in that A. crassus can infect a wide range of intermediate hosts, employ paratenic hosts and survive as larvae for months in the swimbladder wall. This makes it an excellent colonizer. Its major pathogenic effects on eels result from haemorrhaging in, and thickening of, the swimbladder wall. It reduces the oxygen concentration in the swimbladder, reducing its ability to function as a hydrostatic organ, and increases the stress response of eels. In shallow lakes at warm temperatures this can result in mass mortalities. It is also feared that the parasite affects the ability of eels to migrate to the Sargasso Sea and so contributes to the decline in eel populations. Control by drug treatment is possible in culture, but not in the wild.
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Affiliation(s)
- C R Kennedy
- School of Biological Sciences, University of Exeter, Exeter, UK.
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28
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Morley NJ, Lewis JW, Hoole D. Pollutant-induced effects on immunological and physiological interactions in aquatic host–trematode systems: implications for parasite transmission. J Helminthol 2007; 80:137-49. [PMID: 16768857 DOI: 10.1079/joh2006345] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
AbstractUnder conditions of pollution both host and parasite are susceptible to the pathogenic effects of toxicants, which in turn may result in detrimental changes to their immunological and physiological processes. Digenetic trematodes, which encompass species of both medical and economic importance, possess complex life cycles and are common parasites of both vertebrates and molluscs. The combined stress induced by pollution and parasitism influences the physiology of the host which can have implications not only on host survival but also on the functional biology of resident parasite populations. The present paper reviews the effects of pollutants on the immunology and physiology in both vertebrate and molluscan host–trematode systems and the implications for parasite transmission.
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Affiliation(s)
- N J Morley
- School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK.
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29
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Sures B. How parasitism and pollution affect the physiological homeostasis of aquatic hosts. J Helminthol 2007; 80:151-7. [PMID: 16768858 DOI: 10.1079/joh2006346] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
AbstractParasitism poses a serious threat to hosts under certain circumstances, while the well-being of organisms is also negatively affected by environmental pollution. Little information is available on the simultaneous effects of parasites and pollutants on the physiological homeostasis of organisms. The present paper demonstrates that parasites: (i) may influence the metabolism of pollutants in infected hosts, (ii) interact with pollution in synergistic or antagonistic ways, and (iii) may induce physiological reactions in hosts which were thought to be pollutant-induced. Experimental studies on the uptake and accumulation of metals by fish reveal that fish infected with acanthocephalans have lower metal levels than uninfected hosts; e.g. Pomphorhynchus laevis reduces lead levels in fish bile, thereby diminishing or impeding the hepatic intestinal cycling of lead, which may reduce the quantity of metals available for fish. Alterations in pollutant uptake and accumulation in different intermediate and final hosts due to parasites are thus very important in the field of ecotoxicology. In addition to such alterations, there is a close interaction between the effects of pollutants and parasites which seems to be mediated at least partly by the endocrine system, which itself is closely related to the immune system in fish. Laboratory studies on eels experimentally infected with the swimbladder nematode Anguillicola crassus reveal that toxic chemicals such as polychlorinated biphenyls produce immunosuppressive effects which facilitate parasite infection. Similarly, an increase in serum cortisol concentration in eels due to chemical exposure and infection is correlated with decreasing levels of anti-A. crassus antibodies. Furthermore, parasites are able to elicit physiological changes which are attributed to chemicals with endocrine disrupting activity, e.g. the cestode Ligula intestinalis is known to suppress gonad development in roach. The most thoroughly documented examples of endocrine disruption in wild fish are in roach, and it is conceivable that this disruption is not only due to chemical activity but also to parasites such as L. intestinalis or species of the phylum Microspora.
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Affiliation(s)
- B Sures
- Zoologisches Institut I - Okologie/Parasitologie, Universität Karlsruhe, Kaiserstr. 12, Geb. 07.01, 76128 Karlsruhe, Germany.
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Nielsen ME, Esteve-Gassent MD. The eel immune system: present knowledge and the need for research. JOURNAL OF FISH DISEASES 2006; 29:65-78. [PMID: 16436117 DOI: 10.1111/j.1365-2761.2006.00695.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The European eel, Anguilla anguilla, is one of the most important warm water fish species cultured in southern Europe and the Mediterranean as well as in northern countries including Germany, the Netherlands and Denmark. The Japanese eel, A. japonica, is an important cultured fish in several Asiatic countries including Japan, China and Taiwan. During recent decades, research has been performed to elucidate the immune response of these species against different pathogens (viruses, bacteria or parasites). Nevertheless, there is very limited information in terms of both cellular and humoral immune responses. This review summarizes the present knowledge relating to the eel immune system and includes new data.
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Affiliation(s)
- M E Nielsen
- Laboratory for Fish Diseases, Department of Veterinary Pathobiology, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark.
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31
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Sures B, Lutz I, Kloas W. Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel ( Anguilla anguilla ). Parasitology 2005; 132:281-8. [PMID: 16209723 DOI: 10.1017/s0031182005009017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 08/24/2005] [Accepted: 08/24/2005] [Indexed: 11/07/2022]
Abstract
To investigate whether the stress response of European eels infected with Anguillicola crassus is influenced by environmental pollutants, experimentally infected eels were exposed to Cd and/or to 3,3', 4,4', 5-pentachlorobiphenyl (PCB 126). Serum cortisol and glucose concentrations of these eels were monitored over a period of 103 days and were compared with data from infected, unexposed eels as well as with data from uninfected eels. Additionally, the levels of cortisol were correlated with concentrations of Anguillicola-specific antibodies. All eels showed an initial increase of the cortisol levels until day 63. This general elevation of plasma cortisol is most likely due to handling stress, as all eels were repeatedly netted and afterwards inoculated with a feeding tube. At the end of the exposure period eels which were infected and those which were infected and simultaneously exposed to Cd and PCB showed significantly higher levels than the controls. The general course of serum glucose levels in eels resembled that of cortisol. Accordingly, Spearman correlation analysis revealed that an increase in serum cortisol concentrations is correlated with rising levels of glucose. With respect to immune-endocrine interactions a significant negative correlation between cortisol and anti-A. crassus antibodies was found. Our data show that A. crassus is the most potent stressor for European eels among the treatments tested within this study. This is important in terms of ecotoxicological studies as the main effects are caused by parasites rather than chemicals. Accordingly, effects of parasites on the physiological homeostasis of organisms must be considered in ecotoxicology. From the parasitological point of view our results suggest that probably as part of an unbalanced host-parasite interaction A. crassus evokes a strong cortisol response in A. anguilla, thereby suppressing the immune response which in turn enables the parasite to establish. The parasite-induced stress response in the newly adopted European eel might be one of the factors which contributes to the extremely effective colonizing strategy of A. crassus.
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Affiliation(s)
- B Sures
- Zoologisches Institut I - Okologie/Parasitologie, Universität Karlsruhe, Geb. 07.01, Kornblumenstrasse 13, D76128, Karlsruhe, Germany.
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32
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Iwanowicz LR, Lerner DT, Blazer VS, McCormick SD. Aqueous exposure to Aroclor 1254 modulates the mitogenic response of Atlantic salmon anterior kidney T-cells: indications of short- and long-term immunomodulation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2005; 72:305-14. [PMID: 15848250 DOI: 10.1016/j.aquatox.2005.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2004] [Revised: 01/07/2005] [Accepted: 01/18/2005] [Indexed: 05/02/2023]
Abstract
Polychlorinated biphenyls (PCBs) exist as persistent organic pollutants in numerous river systems in the United States. Unfortunately, some of these rivers are sites of active Atlantic salmon restoration programs, and polychlorinated biphenyls have been implicated as ancillary factors contributing to failed salmon restoration. Here, we investigate the immediate and chronic effects of intermediate duration aqueous PCB exposure (1 or 10 microgL-1 Aroclor 1254) on the mitogen-stimulated lymphoproliferative response of Atlantic salmon anterior kidney leukocytes (AKLs). A short-term study was designed to examine immunomodulation in Atlantic salmon smolts immediately following 21 days of aqueous exposure, while a long-term study evaluated chronic impacts in the mitogen response in parr 15 months post-exposure as larvae. The proliferative response of AKLs to the mitogens concanavalin A (CON A), phytohemaglutinnin-P (PHA-P), pokeweed mitogen (PWM), and lipopolysaccharide were used as an indice of immunomodulation. The proliferative response to the T-cell mitogens CON A and PHA-P was significantly increased in the 10 microgL-1 group (n=10; P=0.043 and 0.002, respectively) immediately following exposure of smolts. Additionally, The PHA-P response was significantly increased in the 1 microgL-1 exposure group (n=10, P=0.036). In fish treated as larvae and tested 15 months later, the PHA-P sensitive populations exhibited elevated proliferation in the 1 and 10 microgL-1 groups (n=12, P<0.04) relative to the vehicle control while the PWM response was significantly increased (n=12, P=0.036) only in the 10 microgL-1 treated groups. These results demonstrate an immunomodulatory effect of PCBs on T-cell mitogen sensitive populations of lymphocytes in Atlantic salmon as well as long-term immunomodulation in PHA-P and PWM sensitive populations.
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Affiliation(s)
- Luke R Iwanowicz
- Department of Natural Resources Conservation, University of Massachusetts, Amherst, MA 01003, USA.
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