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Yin P, Björnsson BT, Fjelldal PG, Saito T, Remø SC, Edvardsen RB, Hansen T, Sharma S, Olsen RE, Hamre K. Impact of Antioxidant Feed and Growth Manipulation on the Redox Regulation of Atlantic Salmon Smolts. Antioxidants (Basel) 2022; 11:antiox11091708. [PMID: 36139780 PMCID: PMC9495322 DOI: 10.3390/antiox11091708] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Accumulating evidence indicates a close relationship between oxidative stress and growth rate in fish. However, the underlying mechanisms of this relationship remain unclear. This study evaluated the combined effect of dietary antioxidants and growth hormone (GH) on the liver and the muscle redox status of Atlantic salmon. There were two sequential experimental phases (EP) termed EP1 and EP2, each lasting for 6 weeks. In EP1, Atlantic salmon were fed either low-(L, 230 mg/kg ascorbic acid (Asc), 120 mg/kg α-tocopherol (α-TOH)), or high-(H, 380 mg/kg Asc, 210 mg/kg α-TOH)vitamin diets. The vitamins were supplemented as stable forms and the feeding was continued in EP2. In EP2, half of the fish were implanted with 3 μL per g body weight of recombinant bovine GH (Posilac®, 1 mg rbGH g BW−1) suspended in sesame oil, while the other half were held in different tanks and sham-implanted with similar volumes of the sesame oil vehicle. Here, we show that increasing high levels of vitamin C and E (diet H) increased their content in muscle and liver during EP1. GH implantation decreased vitamin C and E levels in both liver and muscle but increased malondialdehyde (MDA) levels only in the liver. GH also affected many genes and pathways of antioxidant enzymes and the redox balance. Among the most consistent were the upregulation of genes coding for the NADPH oxidase family (NOXs) and downregulation of the oxidative stress response transcription factor, nuclear factor-erythroid 2-related factor 2 (nrf2), and its downstream target genes in the liver. We verified that GH increases the growth rate until the end of the trail and induces an oxidative effect in the liver and muscle of Atlantic salmon. Dietary antioxidants do lower oxidative stress but have no effect on the growth rate. The present study is intended as a starting point to understand the potential interactions between growth and redox signaling in fish.
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Affiliation(s)
- Peng Yin
- Institute of Marine Research, 5817 Bergen, Norway
- Department of Biological Sciences, University of Bergen, 5020 Bergen, Norway
| | - Björn Thrandur Björnsson
- Department of Biological and Environmental Sciences, University of Gothenburg, 411 24 Gothenburg, Sweden
| | - Per Gunnar Fjelldal
- Institute of Marine Research, Matre Aquaculture Research Station, 5984 Matredal, Norway
| | - Takaya Saito
- Institute of Marine Research, 5817 Bergen, Norway
| | | | | | - Tom Hansen
- Institute of Marine Research, Matre Aquaculture Research Station, 5984 Matredal, Norway
| | | | - Rolf Erik Olsen
- Institutt for Biologi Fakultet for Naturvitenskap, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Kristin Hamre
- Institute of Marine Research, 5817 Bergen, Norway
- Correspondence:
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2
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Sato T, Goto-Inoue N, Kimishima M, Toyoharu J, Minei R, Ogura A, Nagoya H, Mori T. A novel ND1 mitochondrial DNA mutation is maternally inherited in growth hormone transgenesis in amago salmon (Oncorhynchus masou ishikawae). Sci Rep 2022; 12:6720. [PMID: 35469048 PMCID: PMC9038734 DOI: 10.1038/s41598-022-10521-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 03/22/2022] [Indexed: 11/12/2022] Open
Abstract
Growth hormone (GH) transgenesis can be used to manipulate the growth performance of fish and mammals. In this study, homozygous and hemizygous GH-transgenic amago salmon (Oncorhynchus masou ishikawae) derived from a single female exhibited hypoglycemia. Proteomic and signal network analyses using iTRAQ indicated a decreased NAD+/NADH ratio in transgenic fish, indicative of reduced mitochondrial ND1 function and ROS levels. Mitochondrial DNA sequencing revealed that approximately 28% of the deletion mutations in the GH homozygous- and hemizygous-female-derived mitochondrial DNA occurred in ND1. These fish also displayed decreased ROS levels. Our results indicate that GH transgenesis in amago salmon may induce specific deletion mutations that are maternally inherited over generations and alter energy production.
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Affiliation(s)
- Tomohiko Sato
- Department of Marine Science and Resources, Nihon University College of Bioresource Sciences, Kameino 1866, Fujisawa, 252-0880, Japan
| | - Naoko Goto-Inoue
- Department of Marine Science and Resources, Nihon University College of Bioresource Sciences, Kameino 1866, Fujisawa, 252-0880, Japan
| | - Masaya Kimishima
- Department of Marine Science and Resources, Nihon University College of Bioresource Sciences, Kameino 1866, Fujisawa, 252-0880, Japan
| | - Jike Toyoharu
- Research Institute of Medical Research Support Center Electron Microscope Laboratory, School of Medicine, Nihon University, Tokyo, 173-8610, Japan
| | - Ryuhei Minei
- Department of Computer Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, 526-0829, Japan
| | - Atsushi Ogura
- Department of Computer Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, 526-0829, Japan
| | - Hiroyuki Nagoya
- National Research Institute of Aquaculture, Fisheries Research and Education Agency, Minamiise, 516-0193, Japan
| | - Tsukasa Mori
- Department of Marine Science and Resources, Nihon University College of Bioresource Sciences, Kameino 1866, Fujisawa, 252-0880, Japan.
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3
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Blasco J, Vélez EJ, Perelló-Amorós M, Azizi S, Capilla E, Fernández-Borràs J, Gutiérrez J. Recombinant Bovine Growth Hormone-Induced Metabolic Remodelling Enhances Growth of Gilthead Sea-Bream ( Sparus aurata): Insights from Stable Isotopes Composition and Proteomics. Int J Mol Sci 2021; 22:ijms222313107. [PMID: 34884912 PMCID: PMC8658469 DOI: 10.3390/ijms222313107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/01/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022] Open
Abstract
Growth hormone and insulin-like growth factors (GH/IGF axis) regulate somatic growth in mammals and fish, although their action on metabolism is not fully understood in the latter. An intraperitoneal injection of extended-release recombinant bovine growth hormone (rbGH, Posilac®) was used in gilthead sea bream fingerlings and juveniles to analyse the metabolic response of liver and red and white muscles by enzymatic, isotopic and proteomic analyses. GH-induced lipolysis and glycogenolysis were reflected in liver composition, and metabolic and redox enzymes reported higher lipid use and lower protein oxidation. In white and red muscle reserves, rBGH increased glycogen while reducing lipid. The isotopic analysis of muscles showed a decrease in the recycling of proteins and a greater recycling of lipids and glycogen in the rBGH groups, which favoured a protein sparing effect. The protein synthesis capacity (RNA/protein) of white muscle increased, while cytochrome-c-oxidase (COX) protein expression decreased in rBGH group. Proteomic analysis of white muscle revealed only downregulation of 8 proteins, related to carbohydrate metabolic processes. The global results corroborated that GH acted by saving dietary proteins for muscle growth mainly by promoting the use of lipids as energy in the muscles of the gilthead sea bream. There was a fuel switch from carbohydrates to lipids with compensatory changes in antioxidant pathways that overall resulted in enhanced somatic growth.
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4
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Okoli AS, Blix T, Myhr AI, Xu W, Xu X. Sustainable use of CRISPR/Cas in fish aquaculture: the biosafety perspective. Transgenic Res 2021; 31:1-21. [PMID: 34304349 PMCID: PMC8821480 DOI: 10.1007/s11248-021-00274-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 07/03/2021] [Indexed: 12/18/2022]
Abstract
Aquaculture is becoming the primary source of seafood for human diets, and farmed fish aquaculture is one of its fastest growing sectors. The industry currently faces several challenges including infectious and parasitic diseases, reduced viability, fertility reduction, slow growth, escapee fish and environmental pollution. The commercialization of the growth-enhanced AquAdvantage salmon and the CRISPR/Cas9-developed tilapia (Oreochromis niloticus) proffers genetic engineering and genome editing tools, e.g. CRISPR/Cas, as potential solutions to these challenges. Future traits being developed in different fish species include disease resistance, sterility, and enhanced growth. Despite these notable advances, off-target effect and non-clarification of trait-related genes among other technical challenges hinder full realization of CRISPR/Cas potentials in fish breeding. In addition, current regulatory and risk assessment frameworks are not fit-for purpose regarding the challenges of CRISPR/Cas notwithstanding that public and regulatory acceptance are key to commercialization of products of the new technology. In this study, we discuss how CRISPR/Cas can be used to overcome some of these limitations focusing on diseases and environmental release in farmed fish aquaculture. We further present technical limitations, regulatory and risk assessment challenges of the use of CRISPR/Cas, and proffer research strategies that will provide much-needed data for regulatory decisions, risk assessments, increased public awareness and sustainable applications of CRISPR/Cas in fish aquaculture with emphasis on Atlantic salmon (Salmo salar) breeding.
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Affiliation(s)
- Arinze S Okoli
- GenØk -Centre for Biosafety, SIVA Innovation Centre, Tromsø, Norway.
| | - Torill Blix
- GenØk -Centre for Biosafety, SIVA Innovation Centre, Tromsø, Norway.,The Norwegian College of Fishery Science, The Arctic University of Norway (UiT), Tromsø, Norway
| | - Anne I Myhr
- GenØk -Centre for Biosafety, SIVA Innovation Centre, Tromsø, Norway
| | - Wenteng Xu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Xiaodong Xu
- Qingdao Vland Biotech Company Group, Qingdao, 266061, China
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5
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Kanerva M, Kiljunen M, Torniainen J, Nikinmaa M, Dutz J, Vuori KA. Environmentally driven changes in Baltic salmon oxidative status during marine migration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 742:140259. [PMID: 32721710 DOI: 10.1016/j.scitotenv.2020.140259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/08/2020] [Accepted: 06/14/2020] [Indexed: 06/11/2023]
Abstract
The fitness and recruitment of fish stocks can be markedly affected by environmental disturbances including global warming, eutrophication and contamination. Understanding the effects of environmental stressors on salmon physiology during marine residence is of a global concern as marine survival has decreased. We present a unique combination of physiological responses - antioxidant defence and oxidative damage biomarkers, stable isotopes and contaminant exposure biomarkers - measured from adult Atlantic salmon (Salmo salar) collected at the Baltic Sea and studied in relation to environmental variables and fitness estimates. The results demonstrate that feeding populations of salmon display marked temporal and spatial variation in oxidative status. Better oxidative status of salmon was characterized by a higher amount of reduced glutathione (GSH) and decreased lipid peroxidation (LPX), when the weight-at-age of 3-4-year old sprats was higher and contaminant exposure biomarker (EROD) was lower. Summer season conditions, which included cooler sea surface temperature (SST), higher bottom O2 and less cyanobacteria also indicated conditions for better oxidative status. Summer SST was additionally shown to affected glutathione metabolism enzyme activities. Oxidative status was associated with stable isotopes δ13C and δ15N indicating indirect effect of abiotic conditions and lower levels of the food web. Differences in condition factor and growth were associated with oxidative status in one and two sea winter salmon, respectively. Wild salmon survival was higher in years when they had higher GSH and catalase activity and lower LPX. Enhanced glutathione metabolism and increased protein carbonyls were associated with higher occurrence of yolk-sac fry mortality (M74). Our results show that oxidative status can provide information on exposure to complex combinations of environmental conditions and stressors in the wild and provide a link of physiological function to individual and population level fitness effects.
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Affiliation(s)
- Mirella Kanerva
- Laboratory of Animal Physiology, Division of Genetics and Physiology, Department of Biology, FI-20014, University of Turku, Finland.
| | - Mikko Kiljunen
- University of Jyvaskyla, Department of Biological and Environmental Science, P.O. Box 35, FI-40014, Finland
| | - Jyrki Torniainen
- University of Jyvaskyla, Department of Biological and Environmental Science, P.O. Box 35, FI-40014, Finland; University of Jyvaskyla, Open Science Centre, P.O. Box 35, FI-40014, Finland
| | - Mikko Nikinmaa
- Laboratory of Animal Physiology, Division of Genetics and Physiology, Department of Biology, FI-20014, University of Turku, Finland
| | - Jörg Dutz
- Leibniz Institute for Baltic Sea Research, Department of Biological Oceanography, Seestrasse 15, D-18119 Rostock-Warnemünde, Germany
| | - Kristiina A Vuori
- Laboratory of Animal Physiology, Division of Genetics and Physiology, Department of Biology, FI-20014, University of Turku, Finland
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6
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Carminato A, Pascoli F, Trocino A, Locatello L, Maccatrozzo L, Palazzi R, Radaelli G, Ballarin C, Bortoletti M, Bertotto D. Productive Results, Oxidative Stress and Contaminant Markers in European Sea Bass: Conventional vs. Organic Feeding. Animals (Basel) 2020; 10:E1226. [PMID: 32708457 PMCID: PMC7401601 DOI: 10.3390/ani10071226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/01/2020] [Accepted: 07/15/2020] [Indexed: 11/16/2022] Open
Abstract
In the present study European sea bass (Dicentrarchus labrax) subjected to two different diets (organic vs. conventional) were evaluated in terms of growing performances, oxidative stress, and contaminant markers. Growing performances were evaluated using biometric measures and condition factor (K), whereas insulin-like growth factor (IGF-I and IGF-II) levels were assessed trough Real-Time PCR analysis. For oxidative stress, immunohistochemical staining for 8-hydroxy-2'-deoxyguanosine (8-OHdG) and 4-hydroxy-2-nonenal (HNE) was performed, whereas total glutathione (GSH) in blood serum was determined by an enzymatic method adapted. Cytochrome P4501A (CYP1A) and melanomacrophage centers (MMCs) were evaluated as contaminant markers trough immunohistochemical and histochemical approaches, respectively. The growing performances showed a positive trend in both groups but a greater productivity in conventional fed fish compared to the organic ones. A significant higher expression of MMCs was observed in organic vs. conventional diet fed fish. Fillet analysis showed a higher MUFA content and a lower PUFAs n-6 content in organically fed sea bass indicating that diets with a content in fatty acids closer to that of wild fish will definitely affect the fatty acid profile of the fish flesh. On the other hand, the diet composition did not seem to affect neither the oxidative stress parameters (GSH, 8-OHdG, HNE) nor the CYP1A expression.
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Affiliation(s)
- Antonio Carminato
- Italian Health Authority and Research Organization for Animal Health and Food Safety, Viale dell’Università 14, 35020 Padova, Italy; (A.C.); (F.P.)
| | - Francesco Pascoli
- Italian Health Authority and Research Organization for Animal Health and Food Safety, Viale dell’Università 14, 35020 Padova, Italy; (A.C.); (F.P.)
| | - Angela Trocino
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
| | - Lisa Locatello
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35121 Padova, Italy;
| | - Lisa Maccatrozzo
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
| | - Renato Palazzi
- Veneto Agricoltura, Innovation and Development Section, Viale dell’Università 14, 35020 Padova, Italy;
| | - Giuseppe Radaelli
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
| | - Cristina Ballarin
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
| | - Martina Bortoletti
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
| | - Daniela Bertotto
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell’Università 16, 35020 Padova, Italy; (A.T.); (L.M.); (C.B.); (M.B.); (D.B.)
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7
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Smith SM, Nager RG, Costantini D. Meta-analysis indicates that oxidative stress is both a constraint on and a cost of growth. Ecol Evol 2016; 6:2833-42. [PMID: 27217942 PMCID: PMC4863009 DOI: 10.1002/ece3.2080] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 02/11/2016] [Accepted: 02/22/2016] [Indexed: 01/01/2023] Open
Abstract
Oxidative stress (OS) as a proximate mechanism for life‐history trade‐offs is widespread in the literature. One such resource allocation trade‐off involves growth rate, and theory suggests that OS might act as both a constraint on and a cost of growth, yet studies investigating this have produced conflicting results. Here, we use meta‐analysis to investigate whether increased OS levels impact on growth (OS as a constraint on growth) and whether greater growth rates can increase OS (OS as a cost of growth). The role of OS as a constraint on growth was supported by the meta‐analysis. Greater OS, in terms of either increased damage or reduced levels of antioxidants, was associated with reduced growth although the effect depended on the experimental manipulation used. Our results also support an oxidative cost of growth, at least in terms of increased oxidative damage, although faster growth was not associated with a change in antioxidant levels. These findings that OS can act as a constraint on growth support theoretical links between OS and animal life histories and provide evidence for a growth–self‐maintenance trade‐off. Furthermore, the apparent oxidative costs of growth imply individuals cannot alter this trade‐off when faced with enhanced growth. We offer a starting platform for future research and recommend the use of oxidative damage biomarkers in nonlethal tissue to investigate the growth–OS relationship further.
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Affiliation(s)
- Shona M Smith
- Institute of Biodiversity, Animal Health & Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - Ruedi G Nager
- Institute of Biodiversity, Animal Health & Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - David Costantini
- Institute of Biodiversity, Animal Health & Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK; Department of Biology University of Antwerp Antwerp 2610 Belgium
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8
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Pauliny A, Devlin RH, Johnsson JI, Blomqvist D. Rapid growth accelerates telomere attrition in a transgenic fish. BMC Evol Biol 2015; 15:159. [PMID: 26268318 PMCID: PMC4535669 DOI: 10.1186/s12862-015-0436-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 07/29/2015] [Indexed: 12/27/2022] Open
Abstract
Background Individuals rarely grow as fast as their physiologies permit despite the fitness advantages of being large. One reason may be that rapid growth is costly, resulting for example in somatic damage. The chromosomal ends, the telomeres, are particularly vulnerable to such damage, and telomere attrition thus influences the rate of ageing. Here, we used a transgenic salmon model with an artificially increased growth rate to test the hypothesis that rapid growth is traded off against the ability to maintain somatic health, assessed as telomere attrition. Results We found substantial telomere attrition in transgenic fish, while maternal half-sibs growing at a lower, wild-type rate seemed better able to maintain the length of their telomeres during the same time period. Conclusions Our results are consistent with a trade-off between rapid growth and somatic (telomere) maintenance in growth-manipulated fish. Since telomere erosion reflects cellular ageing, our findings also support theories of ageing postulating that unrepaired somatic damage is associated with senescence. Electronic supplementary material The online version of this article (doi:10.1186/s12862-015-0436-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Angela Pauliny
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Gothenburg, Sweden.
| | - Robert H Devlin
- Marine Ecosystems and Aquaculture Division, Fisheries and Oceans Canada, 4160 Marine Drive, West Vancouver, BC, V7V 1N6, Canada.
| | - Jörgen I Johnsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Gothenburg, Sweden.
| | - Donald Blomqvist
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30, Gothenburg, Sweden.
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9
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Kim JH, Balfry S, Devlin RH. Disease resistance and health parameters of growth-hormone transgenic and wild-type coho salmon, Oncorhynchus kisutch. FISH & SHELLFISH IMMUNOLOGY 2013; 34:1553-1559. [PMID: 23545266 DOI: 10.1016/j.fsi.2013.03.365] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 02/26/2013] [Accepted: 03/20/2013] [Indexed: 06/02/2023]
Abstract
To extend previous findings regarding fish health and disease susceptibility of growth-enhanced fish, hematological and immunological parameters have been compared between growth hormone (GH) transgenic and wild-type non-transgenic coho salmon (Oncorhynchus kisutch). Compared to non-transgenic coho salmon, transgenic fish had significantly higher hematocrit (Hct), hemoglobin (Hb), mean cellular hemoglobin (MCH), mean cellular volume (MCV), and erythrocyte numbers, and lower white cell numbers. In addition, resistance to the bacterial pathogen Aeromonas salmonicida (causal agent of furunculosis) has been assessed between the strains. Higher susceptibility of transgenic fish to this disease challenge was observed in two separate year classes of fish. The present findings provide fundamental knowledge of the disease resistance on GH enhanced transgenic coho salmon, which is of importance for assessing the fitness of transgenic strains for environmental risk assessments, and for improving our understanding effects of growth modification on basic immune functions.
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Affiliation(s)
- Jin-Hyoung Kim
- Fisheries and Oceans Canada, Centre for Aquaculture and Environmental Research, West Vancouver, BC, Canada
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10
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Carney Almroth B, Johnsson JI, Devlin R, Sturve J. Oxidative stress in growth hormone transgenic coho salmon with compressed lifespan--a model for addressing aging. Free Radic Res 2012; 46:1183-9. [PMID: 22655913 DOI: 10.3109/10715762.2012.698009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Growth hormone (GH) transgenic fish have dramatically enhanced growth rates, increased oxygen demands and reactive oxygen species production. GH-transgenic coho salmon provide an opportunity to address effects of increased metabolism on physiological aging. The objective of this study was to compare oxidative stress in wild-type (WT) and GH-transgenic (T) coho salmon (Oncorhynchus kisutch) of different ages (1 and 2 years). Antioxidant enzyme activity, protein carbonyls (PC) and glutathione (GSH, GSSG) were measured. PC correlated to growth rates in individual fish. T fish exhibited lower antioxidant enzyme activities and GSH levels compared to the WT, while levels of PC and GSSG were higher. Age affects were observed in both WT and T fish; enzyme activities and GSH decreased while PC and GSSG increased. Our results support the metabolic rate theory of aging. This study aims to be a platform for continued studies of the theories of aging using fish as model organisms.
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Affiliation(s)
- Bethanie Carney Almroth
- University of Gothenburg, Department of Biological and Environmental Sciences, Göteborg, Sweden.
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11
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Pascoli F, Lanzano GS, Negrato E, Poltronieri C, Trocino A, Radaelli G, Bertotto D. Seasonal effects on hematological and innate immune parameters in sea bass Dicentrarchus labrax. FISH & SHELLFISH IMMUNOLOGY 2011; 31:1081-1087. [PMID: 21945635 DOI: 10.1016/j.fsi.2011.09.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 09/01/2011] [Accepted: 09/09/2011] [Indexed: 05/31/2023]
Abstract
The temperate aquatic environment is affected by two primary components of season, temperature and photoperiod, during the annual cycle. Many organisms respond to seasonal change physiologically, behaviorally or both. The aim of this study was to investigate the effect of seasonality on cortisol, hematological and innate immune parameters in European sea bass reared under traditional semi-intensive aquaculture. Sea bass (Dicentrarchus labrax) were reared in an outdoor pond and serum cortisol, hematocrit, leucocrit, serum lysozyme activity and total glutathione were bimonthly monitored over a 14-months period. The effect of seasonality was observed for all parameters carried out, with generally higher values in summer and lower in winter. These results could improve the understanding of the influence of seasonal cues on the immune system and hematological parameters in fish in order to optimize the husbandry practices.
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Affiliation(s)
- F Pascoli
- Department of Experimental Veterinary Sciences, Faculty of Veterinary Medicine, University of Padua, Italy
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12
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da Rosa CE, Figueiredo MA, Lanes CFC, Almeida DV, Marins LF. Genotype-dependent gene expression profile of the antioxidant defense system (ADS) in the liver of a GH-transgenic zebrafish model. Transgenic Res 2010; 20:85-9. [PMID: 20419347 DOI: 10.1007/s11248-010-9395-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Accepted: 04/01/2010] [Indexed: 12/30/2022]
Abstract
The aim of this study was to evaluate the effects of growth hormone (GH) overexpression on the gene expression profile of multiple components of the antioxidant defense system (ADS) of different genotypes of a GH-transgenic zebrafish (Danio rerio) model. Several ADS-related genes were analyzed by semiquantitative reverse transcription-PCR in the liver of hemizygous (HE) and homozygous (HO) transgenic zebrafish. The results showed a significant reduction in the glutamate cysteine ligase catalytic subunit (GCLC) and the gene expression of two glutathione S-transferase (GST) isoforms and an increase in the glutathione reductase gene in the HO group compared to non-transgenic controls. The expression of the Cu, Zn-superoxide dismutase (SOD1) and catalase (CAT) genes was reduced in HO and HE groups, respectively. Among the ten genes analyzed, two were altered in HE transgenic zebrafish and five were altered in HO transgenic zebrafish. These findings indicate a genotype-dependent gene expression profile of the ADS-related genes in the liver of our GH-transgenic zebrafish model and are in agreement with the general effects of GH hypersecretion in the fish and mouse, which involves a reduction in the capability of the tissues to deal with oxidative stress situations. The GH-transgenic zebrafish model used here seems to be an interesting tool for analyzing the effect of different GH expression levels on physiological processes.
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Affiliation(s)
- Carlos E da Rosa
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Avenida Itália, Km 8, Rio Grande, RS, 96201-900, Brazil
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13
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Leggatt RA, Iwama GK. Exogenous glutathione can increase glutathione levels in tissues of rainbow trout (Oncorhynchus mykiss) through extracellular breakdown and intracellular synthesis. Comp Biochem Physiol C Toxicol Pharmacol 2009; 150:322-8. [PMID: 19477299 DOI: 10.1016/j.cbpc.2009.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2009] [Revised: 05/18/2009] [Accepted: 05/19/2009] [Indexed: 12/29/2022]
Abstract
Glutathione (GSH) is an important intracellular antioxidant involved in numerous cellular pathways. However, little is known about the transport of GSH into fish tissues. To determine whether fish tissues took up GSH by extracellular breakdown and intracellular synthesis or by direct cellular transport, we injected rainbow trout (Oncorhynchus mykiss) with exogenous GSH along with blockers of GSH breakdown and synthesis. Exogenous GSH increased GSH levels to the greatest degree in the cells of the posterior kidney, followed by the liver. Exogenous GSH inconsistently increased liver GSH levels independent of GSH synthesis, although this may have been due to disruption of gradient-dependent GSH export, and not necessarily to intact uptake of GSH. The cells of the posterior kidney, liver and gill took up GSH by extracellular breakdown and intracellular synthesis. This indicates that, unlike mammalian tissues, normal cellular GSH levels in fish are not sufficient to inhibit additional GSH synthesis. This may lend flexibility to the GSH system in fish, where levels of GSH may rapidly increase in response to an increased supply of amino acids, or during times of high demand, without increasing synthesis enzymes.
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Affiliation(s)
- Rosalind A Leggatt
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada.
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14
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Studzinski ALM, Almeida DV, Lanes CFC, Figueiredo MDA, Marins LF. SOCS1 and SOCS3 are the main negative modulators of the somatotrophic axis in liver of homozygous GH-transgenic zebrafish (Danio rerio). Gen Comp Endocrinol 2009; 161:67-72. [PMID: 18955058 DOI: 10.1016/j.ygcen.2008.10.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 10/07/2008] [Accepted: 10/08/2008] [Indexed: 12/26/2022]
Abstract
Homozygote individuals (HO) of the GH-transgenic zebrafish lineage (F0104), despite expressing double the amount of growth hormone (GH) in relation to the hemizygote (HE) individuals, presented smaller growth in relation to the last, and similar to the non-transgenic (NT) group. Through the analysis of the expression of genes of the somatotrophic axis in the livers of HO and NT individuals, it was verified that GHR, JAK2 and STAT5.1 did not present significant differences among the analyzed genotypes (NT and HO). However, in the IGF-I gene expression, an accentuated decrease was observed in group HO (p<0.01), suggesting a resistance effect to excess GH. This resistance could be related to the insufficient amount of energy for supporting the accelerated metabolic demand caused by excess circulating GH. Analysis of the genes involved in the regulation of GH signalization by dephosphorylation (PTP-H1 and PTP-1B) did not show any significant alteration when comparing groups HO and NT. However, the analysis of the SOCS1 and SOCS3 genes showed an induction in homozygotes of 2.5 times (p<0.01) and 4.3 times (p<0.05), respectively, in relation to non-transgenics. The results of the present work demonstrate that, in homozygotes, GH signaling is reduced by the action of the SOCS1 and SOCS3 proteins.
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Affiliation(s)
- Ana Lupe Motta Studzinski
- Programa de Pós-Graduação em Ciências Fisiológicas: Fisiologia Animal Comparada, Universidade Federal do Rio Grande-FURG, Rio Grande, RS, Brazil
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15
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Tobler M, Sandell MI. Sex-specific effects of prenatal testosterone on nestling plasma antioxidant capacity in the zebra finch. J Exp Biol 2009; 212:89-94. [DOI: 10.1242/jeb.020826] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
SUMMARY
Trans-generational transfer of non-genetic, maternal resources such as hormones can have a substantial influence on offspring phenotype in many vertebrate species. In birds, maternal androgens enhance both growth and competitive behaviour, but also suppress the immune system. It has been hypothesised that high levels of egg androgens could also influence the prooxidant–antioxidant balance through their positive effect on growth and metabolism. We tested this hypothesis in the zebra finch (Taeniopygia guttata). Eggs were injected with testosterone dissolved in sesame oil or sesame oil only (control). We subsequently assessed the effect of the egg hormone manipulation on nestling growth and nestling plasma total antioxidant capacity (TAC). Growth rates of zebra finch nestlings were not significantly affected by egg hormone treatment. However, male offspring hatched from eggs with experimentally elevated testosterone had reduced plasma TAC at 10 days of age compared with male offspring hatching from control eggs. At the age of 34 days, males had similar plasma TAC irrespective of egg treatment. No effects of egg testosterone manipulation on nestling plasma TAC were found in females. Our results demonstrate that embryonic exposure to elevated levels of testosterone modulates chick antioxidant status, but this seems to be independent of chick growth. Sex-specific effects of prenatal testosterone on plasma TAC of zebra finch nestlings may have important consequences for sex allocation.
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Affiliation(s)
- Michael Tobler
- Department of Animal Ecology, Lund University, Ecology Building, SE-223 62 Lund, Sweden
| | - Maria I. Sandell
- Department of Animal Ecology, Lund University, Ecology Building, SE-223 62 Lund, Sweden
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16
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Rosa CE, Figueiredo MA, Lanes CFC, Almeida DV, Monserrat JM, Marins LF. Metabolic rate and reactive oxygen species production in different genotypes of GH-transgenic zebrafish. Comp Biochem Physiol B Biochem Mol Biol 2007; 149:209-14. [PMID: 17931920 DOI: 10.1016/j.cbpb.2007.09.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 09/12/2007] [Accepted: 09/12/2007] [Indexed: 01/11/2023]
Abstract
Growth hormone overexpression increases growth and consequently increases the metabolic rate in fishes. Therefore, the objective of this study was to evaluate the effects of growth hormone overexpression in zebrafish Danio rerio in terms of growth, oxygen consumption, reactive oxygen species production, lipid hydroperoxide content, antioxidant enzyme activity and glutamate-cysteine ligase catalytic subunit gene expression. The employed models were wild type and transgenic (hemizygous and homozygous) zebrafish expressing the Odonthestes argentinensis growth hormone gene directed by the Cyprinus carpio beta-actin promoter. Higher growth parameters were observed in the hemizygous group. The homozygous group possessed higher oxygen consumption and reactive oxygen species production. Growth hormone transgenesis causes a decrease in glutamate-cysteine ligase catalytic subunit expression, an enzyme responsible for glutathione synthesis. Although the lipid hydroperoxide content was similar between groups, we demonstrate that growth hormone overexpression has the potential to generate oxidative stress in fishes.
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Affiliation(s)
- C E Rosa
- Fundação Universidade Federal do Rio Grande, Brazil.
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