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Da Silva EG, Finamor IA, Bressan CA, Schoenau W, Vencato MDS, Pavanato MA, Cargnelutti JF, Da Costa ST, Antoniazzi AQ, Baldisserotto B. Dietary Supplementation with R-(+)-Limonene Improves Growth, Metabolism, Stress, and Antioxidant Responses of Silver Catfish Uninfected and Infected with Aeromonas hydrophila. Animals (Basel) 2023; 13:3307. [PMID: 37958062 PMCID: PMC10650795 DOI: 10.3390/ani13213307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
R-(+)-limonene is a monoterpene from plants of the genus Citrus with diverse biological properties. This research evaluated the effects of dietary supplementation with R-(+)-limonene on growth, metabolic parameters in plasma and liver, and the antioxidant and stress responses in silver catfish, Rhamdia quelen, challenged or not with Aeromonas hydrophila. Fish were fed for 67 days with different doses of R-(+)-limonene in the diet (control 0.0, L0.5, L1.0, and L2.0 mL/kg of diet). On the 60th day, a challenge with A. hydrophila was performed. R-(+)-limonene in the diet potentiated the productive performance of the fish. The metabolic and antioxidant responses indicate that R-(+)-limonene did not harm the health of the animals and made them more resistant to the bacterial challenge. Histological findings showed the hepatoprotective effect of dietary R-(+)-limonene against A. hydrophila. Igf1 mRNA levels were upregulated in the liver of fish fed with an L2.0 diet but downregulated with bacterial challenge. The expression levels of crh mRNA were higher in the brains of fish fed with the L2.0 diet. However, the L2.0 diet downregulated crh and hspa12a mRNA expression in the brains of infected fish. In conclusion, the results indicated that R-(+)-limonene can be considered a good dietary supplement for silver catfish.
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Affiliation(s)
- Elisia Gomes Da Silva
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - Isabela Andres Finamor
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - Caroline Azzolin Bressan
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - William Schoenau
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - Marina De Souza Vencato
- Department of Morphology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (M.D.S.V.); (S.T.D.C.)
| | - Maria Amália Pavanato
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - Juliana Felipetto Cargnelutti
- Department of Preventive Veterinary Medicine, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil;
| | - Sílvio Teixeira Da Costa
- Department of Morphology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (M.D.S.V.); (S.T.D.C.)
| | - Alfredo Quites Antoniazzi
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
| | - Bernardo Baldisserotto
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil; (E.G.D.S.); (I.A.F.); (C.A.B.); (W.S.); (M.A.P.); (A.Q.A.)
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Al-Abdulla R, Ferrero H, Boronat-Belda T, Soriano S, Quesada I, Alonso-Magdalena P. Exploring the Effects of Metabolism-Disrupting Chemicals on Pancreatic α-Cell Viability, Gene Expression and Function: A Screening Testing Approach. Int J Mol Sci 2023; 24:ijms24021044. [PMID: 36674557 PMCID: PMC9862653 DOI: 10.3390/ijms24021044] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/26/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023] Open
Abstract
Humans are constantly exposed to many environmental pollutants, some of which have been largely acknowledged as key factors in the development of metabolic disorders such as diabetes and obesity. These chemicals have been classified as endocrine-disrupting chemicals (EDCs) and, more recently, since they can interfere with metabolic functions, they have been renamed as metabolism-disrupting chemicals (MDCs). MDCs are present in many consumer products, including food packaging, personal care products, plastic bottles and containers, and detergents. The scientific literature has ever-increasingly focused on insulin-releasing pancreatic β-cells as one of the main targets for MDCs. Evidence highlights that these substances may disrupt glucose homeostasis by altering pancreatic β-cell physiology. However, their potential impact on glucagon-secreting pancreatic α-cells remains poorly known despite the essential role that this cellular type plays in controlling glucose metabolism. In the present study, we have selected seven paradigmatic MDCs representing major toxic classes, including bisphenols, phthalates, perfluorinated compounds, metals, and pesticides. By using an in vitro cell-based model, the pancreatic α-cell line αTC1-9, we have explored the effects of these compounds on pancreatic α-cell viability, gene expression, and secretion. We found that cell viability was moderately affected after bisphenol-A (BPA), bisphenol-F (BPF), and perfluorooctanesulfonic acid (PFOS) exposure, although cytotoxicity was relatively low. In addition, all bisphenols, as well as di(2-ethylhexyl) phthalate (DEHP) and cadmium chloride (CdCl2), promoted a marked decreased on glucagon secretion, together with changes in the expression of glucagon and/or transcription factors involved in cell function and identity, such as Foxo1 and Arx. Overall, our results indicated that most of the selected chemicals studied caused functional alterations in pancreatic α-cells. Moreover, we revealed, for the first time, their direct effects on key molecular aspects of pancreatic α-cell biology.
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Affiliation(s)
- Ruba Al-Abdulla
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
| | - Hilda Ferrero
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Talía Boronat-Belda
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
| | - Sergi Soriano
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
- Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, 03690 Alicante, Spain
| | - Iván Quesada
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Paloma Alonso-Magdalena
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, 03202 Elche, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
- Correspondence:
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Ortega P, Vitorino HA, Green S, Zanotto FP, Chung JS, Moreira RG. Experimental effects of cadmium on physiological response of Callinectes danae (Crustacea, Portunidae) from environments with different levels of Cd contamination. Comp Biochem Physiol C Toxicol Pharmacol 2022; 251:109210. [PMID: 34628057 DOI: 10.1016/j.cbpc.2021.109210] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/27/2021] [Accepted: 10/03/2021] [Indexed: 11/16/2022]
Abstract
Cadmium (Cd) can adversely affect aquatic life, altering reproductive and molting processes in crustaceans. The objective of this study was to evaluate the influence of Cd on reproduction and molting in the crab Callinectes danae. Adult females were obtained from environments with different levels of pollution: low (LC), medium (MC), and high contaminated (HC) areas. Animals from LC, MC, and HC areas were exposed to 0, 0.5, and 2 mg L-1 of CdCl2 for 3 h. Cd bioaccumulation, oxidative stress (evaluated by antioxidant enzymes activity), and lipid peroxidation (LPX) were analyzed in mature ovaries (stage II), gills, and hepatopancreas. The expression levels of crustacean hyperglycemic hormone (CHH) and molt-inhibiting hormone (MIH) genes were quantified in the eyestalks, while 17β-estradiol (E2) and melatonin concentration were measured in the hemolymph. Cd bioaccumulated mainly in the hepatopancreas and gills, with increased E2, LPX, and antioxidant enzymes in HC compared to the LC region. Decreased CHH and MIH transcripts were observed in the animals from HC regions compared to LC and MC areas. Physiological differences were recorded, especially for bioaccumulation, oxidative stress, and hormone levels, in animals sampled in HC areas compared to LC and MC regions. In conclusion, the physiological damage triggered by Cd could be reduced due to higher levels of melatonin and antioxidant enzymes in HC areas.
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Affiliation(s)
- Priscila Ortega
- Laboratório de Metabolismo e Reprodução de Organismos Aquáticos (LAMEROA), Instituto de Biociências (IB), Universidade de São Paulo (USP), Brazil.
| | - Hector Aguilar Vitorino
- Laboratório de Química Bioinorgânica e Metalofármacos (LAQBAM), Instituto de Química (IQ), Universidade de São Paulo (USP), Brazil; BIOMET Research Group, Faculty of Science, National University of Engineering, Av. Túpac Amaru 210, Rímac 15333, Lima, Peru.
| | - Shadaesha Green
- Institute of Marine and Environmental Technology (IMET), University of Maryland Center for Environmental Science (UMCES), Baltimore, USA.
| | - Flavia P Zanotto
- Laboratório de Biologia Celular de Invertebrados Marinhos (LabCel), Instituto de Biociências (IB), Universidade de São Paulo (USP), Brazil.
| | - J Sook Chung
- Institute of Marine and Environmental Technology (IMET), University of Maryland Center for Environmental Science (UMCES), Baltimore, USA.
| | - Renata G Moreira
- Laboratório de Metabolismo e Reprodução de Organismos Aquáticos (LAMEROA), Instituto de Biociências (IB), Universidade de São Paulo (USP), Brazil.
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Angadi P, Das M, Roy R. Effect of high salinity acclimation on glucose homeostasis in Mozambique tilapia (Oreochromis mossambicus). FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:2055-2065. [PMID: 34766241 DOI: 10.1007/s10695-021-01022-8] [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: 03/09/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
During salinity stress, osmoregulatory processes in euryhaline fish need to modify for their survival, and glucose is the preferred mode of extra energy during such conditions. These organisms must have a proper mechanism to maintain glucose homeostasis during such modified osmoregulatory process across different body fluids. Hence, we studied high salinity effect on regulation of glucose homeostasis in Mozambique tilapia. The fish were induced to 15‰ salinity for 21 days. Glucose, glycogen, ion concentrations, Na+-K+-ATPase, pyruvate kinase, γ-amylase activities and GLUT mRNA expressions were investigated in liver, intestine, gill and white muscle tissues. At the end of experiment, Na+ ion concentrations, glucose content and activity of Na+-K+-ATPase especially in the gill and intestine were increased, while decrease in liver and gill glycogen content was seen. Lower concentration of glycogen decrease was observed in the intestine and white muscle of the treated group. High pyruvate kinase activity was noticed in liver and gill tissues that correlates with high Na+-K+-ATPase activity. Elevated γ-amylase activity was observed in the liver and intestine suggesting breakdown of glycogen; however, gill and white muscle did not show any increased activity. Increase in GLUT1 and GLUT4 mRNA expressions was observed especially in the gill and intestine, while increase in GLUT2 mRNA expressions was observed in the liver. Upregulations of GLUTs suggest higher influx of glucose into the cell for catabolism to provide energy and further to drive the enhanced osmoregulatory process. These findings suggest glucose homeostasis being regulated in Mozambique tilapia during salinity acclimation.
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Affiliation(s)
- Prateek Angadi
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India
| | - Moitreyi Das
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India
| | - Ramaballav Roy
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India.
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Liang P, Saqib HSA, Lin Z, Zheng R, Qiu Y, Xie Y, Ma D, Shen Y. RNA-seq analyses of Marine Medaka (Oryzias melastigma) reveals salinity responsive transcriptomes in the gills and livers. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 240:105970. [PMID: 34562875 DOI: 10.1016/j.aquatox.2021.105970] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/10/2021] [Accepted: 09/11/2021] [Indexed: 06/13/2023]
Abstract
Increasing salinity levels in marine and estuarine ecosystems greatly influence developmental, physiological and molecular activities of inhabiting fauna. Marine medaka (Oryzias melastigma), a euryhaline research model, has extraordinary abilities to survive in a wide range of aquatic salinity. To elucidate how marine medaka copes with salinity differences, the responses of Oryzias melastigma after being transferred to different salt concentrations [0 practical salinity units (psu), 15 psu, 30 psu (control), 45 psu] were studied at developmental, histochemical and transcriptome levels in the gill and liver tissues. A greater number of gills differentially expressed genes (DEG) under 0 psu (609) than 15 psu (157) and 45 psu (312), indicating transcriptomic adjustments in gills were more sensitive to the extreme hypotonic environment. A greater number of livers DEGs were observed in 45 psu (1,664) than 0 psu (87) and L15 psu (512), suggesting that liver was more susceptible to hypertonic environment. Further functional analyses of DEGs showed that gills have a more immediate response, mainly in adjusting ion balance, immune and signal transduction. In contrast, DEGs in livers were involved in protein synthesis and processing. We also identified common DEGs in both gill and liver and found they were mostly involved in osmotic regulation of amino sugar and nucleotide sugar metabolism and steroid biosynthesis. Additionally, salinity stresses showed no significant effects on most developmental and histochemical parameters except increased heartbeat with increasing salinity and decreased glycogen after transferred from stable conditions (30 psu) to other salinity environments. These findings suggested that salinity-stress induced changes in gene expressions could reduce the effects on developmental and histochemical parameters. Overall, this study provides a useful resource for understanding the molecular mechanisms of fish responses to salinity stresses.
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Affiliation(s)
- Pingping Liang
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Hafiz Sohaib Ahmed Saqib
- Guangdong Provincial Key Laboratory of Marine Biology, College of Science, Shantou University, Shantou 515063, China
| | - Zeyang Lin
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Ruping Zheng
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Yuting Qiu
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Yuting Xie
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Dongna Ma
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Yingjia Shen
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
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Champion C, Broadhurst MK, Ewere EE, Benkendorff K, Butcherine P, Wolfe K, Coleman MA. Resilience to the interactive effects of climate change and discard stress in the commercially important blue swimmer crab (Portunus armatus). MARINE ENVIRONMENTAL RESEARCH 2020; 159:105009. [PMID: 32662439 DOI: 10.1016/j.marenvres.2020.105009] [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: 03/24/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
Globally, millions of people depend on nutritional benefits from seafood consumption, but few studies have tested for effects of near-future climate change on seafood health and quality. Quantitative assessments of the interactive effects of climate change and discarding of fisheries resources are also lacking, despite ~10% of global catches being discarded annually. Utilising the harvested blue swimmer crab (Portunus armatus), we experimentally tested the effects of near-future temperature and salinity treatments under simulated capture and discarding on a suite of health and nutritional quality parameters. We show that nutritional quality (protein, lipids, moisture content and fatty acid composition) was not significantly affected by near-future climate change. Further, stress biomarkers (catalase and glutathione S-transferases activity and glycogen content) did not differ significantly among treatments following simulated capture and discarding. These results support the inherent resilience of P. armatus to short-term environmental change, and indicate that negative physiological responses associated with discarding may not be exacerbated in a future ocean. We suggest that harvested estuarine species, and thus the industries and food security they underpin, may be resilient to the future effects of climate change due to their adaptation to naturally variable habitats.
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Affiliation(s)
- Curtis Champion
- NSW Department of Primary Industries, National Marine Science Centre, Coffs Harbour, New South Wales, Australia; National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia.
| | - Matt K Broadhurst
- NSW Department of Primary Industries, National Marine Science Centre, Coffs Harbour, New South Wales, Australia
| | - Endurance E Ewere
- Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales, Australia
| | - Kirsten Benkendorff
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia; Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales, Australia
| | - Peter Butcherine
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia; Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales, Australia
| | - Kennedy Wolfe
- Marine Spatial Ecology Lab, School of Biological Sciences and ARC Centre of Excellence for Coral Reef Studies, University of Queensland, St Lucia, Queensland, Australia
| | - Melinda A Coleman
- NSW Department of Primary Industries, National Marine Science Centre, Coffs Harbour, New South Wales, Australia; National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales, Australia
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Zhang J, Yang Y, Liu W, Schlenk D, Liu J. Glucocorticoid and mineralocorticoid receptors and corticosteroid homeostasis are potential targets for endocrine-disrupting chemicals. ENVIRONMENT INTERNATIONAL 2019; 133:105133. [PMID: 31520960 DOI: 10.1016/j.envint.2019.105133] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/19/2019] [Accepted: 08/26/2019] [Indexed: 05/16/2023]
Abstract
Endocrine-disrupting chemicals (EDCs) have received significant concern, since they ubiquitously exist in the environment and are able to induce adverse health effects on human and wildlife. Increasing evidence shows that the glucocorticoid receptor (GR) and the mineralocorticoid receptor (MR), members of the steroid receptor subfamily, are potential targets for EDCs. GR and MR mediate the actions of glucocorticoids and mineralocorticoids, respectively, which are two main classes of corticosteroids involved in many physiological processes. The effects of EDCs on the homeostasis of these two classes of corticosteroids have also gained more attention recently. This review summarized the effects of environmental GR/MR ligands on receptor activity, and disruption of corticosteroid homeostasis. More than 130 chemicals classified into 7 main categories were reviewed, including metals, metalloids, pesticides, bisphenol analogues, flame retardants, other industrial chemicals and pharmaceuticals. The mechanisms by which EDCs interfere with GR/MR activity are primarily involved in ligand-receptor binding, nuclear translocation of the receptor complex, DNA-receptor binding, and changes in the expression of endogenous GR/MR genes. Besides directly interfering with receptors, enzyme-catalyzed synthesis and prereceptor regulation pathways of corticosteroids are also important targets for EDCs. The collected evidence suggests that corticosteroids and their receptors should be considered as potential targets for safety assessment of EDCs. The recognition of relevant xenobiotics and their underlying mechanisms of action is still a challenge in this emerging field of research.
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Affiliation(s)
- Jianyun Zhang
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Department of Public Health, School of Medicine, Hangzhou Normal University, Hangzhou 310036, China
| | - Ye Yang
- Institute of Hygiene, Zhejiang Academy of Medical Sciences, Hangzhou 310013, China
| | - Weiping Liu
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Daniel Schlenk
- Department of Environmental Sciences, University of California, Riverside, 900 University Avenue, Riverside, CA 92521, United States
| | - Jing Liu
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Chang CH, Huang JJ, Yeh CY, Tang CH, Hwang LY, Lee TH. Salinity Effects on Strategies of Glycogen Utilization in Livers of Euryhaline Milkfish ( Chanos chanos) under Hypothermal Stress. Front Physiol 2018; 9:81. [PMID: 29483878 PMCID: PMC5816346 DOI: 10.3389/fphys.2018.00081] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 01/23/2018] [Indexed: 12/13/2022] Open
Abstract
The fluctuation of temperature affects many physiological responses in ectothermic organisms, including feed intake, growth, reproduction, and behavior. Changes in environmental temperatures affect the acquisition of energy, whereas hepatic glycogen plays a central role in energy supply for the homeostasis of the entire body. Glycogen phosphorylase (GP), which catalyzes the rate-limiting step in glycogenolysis, is also an indicator of environmental stress. Here, we examined the effects of salinity on glycogen metabolism in milkfish livers under cold stress. A reduction of feed intake was observed in both freshwater (FW) and seawater (SW) milkfish under cold adaptation. At normal temperature (28°C), compared to the FW milkfish, the SW milkfish exhibited greater mRNA abundance of the liver isoform of GP (Ccpygl), higher GP activity, and less glycogen content in the livers. Upon hypothermal (18°C) stress, hepatic Ccpygl mRNA expression of FW milkfish surged at 3 h, declined at 6 and 12 h, increased again at 24 h, and increased significantly after 96 h. Increases in GP protein, GP activity, and the phosphorylation state and the breakdown of glycogen were also found in FW milkfish livers after 12 h of exposure at 18°C. Conversely, the Ccpygl transcript levels in SW milkfish were downregulated after 1 h of exposure at 18°C, whereas the protein abundance of GP, GP activity, and glycogen content were not significantly altered. Taken together, under 18°C cold stress, FW milkfish exhibited an acute response with the breakdown of hepatic glycogen for maintaining energy homeostasis of the entire body, whereas no change was observed in the hepatic glycogen content and GP activity of SW milkfish because of their greater tolerance to cold conditions.
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Affiliation(s)
- Chia-Hao Chang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Jian-Jun Huang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Chun-Yi Yeh
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Cheng-Hao Tang
- Department of Oceanography, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Lie-Yueh Hwang
- Mariculture Research Center, Fisheries Research Institute, Council of Agriculture, Yulin, Taiwan
| | - Tsung-Han Lee
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan.,Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
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Fang Z, Chen Z, Wang S, Shi P, Shen Y, Zhang Y, Xiao J, Huang Z. Overexpression of OLE1 Enhances Cytoplasmic Membrane Stability and Confers Resistance to Cadmium in Saccharomyces cerevisiae. Appl Environ Microbiol 2017; 83:e02319-16. [PMID: 27793829 PMCID: PMC5165106 DOI: 10.1128/aem.02319-16] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 10/24/2016] [Indexed: 01/09/2023] Open
Abstract
The heavy metal cadmium is widely used and released into the environment, posing a severe threat to crops and humans. Saccharomyces cerevisiae is one of the most commonly used organisms in the investigation of environmental metal toxicity. We investigated cadmium stress and the adaptive mechanisms of yeast by screening a genome-wide essential gene overexpression library. A candidate gene, OLE1, encodes a delta-9 desaturase and was associated with high anti-cadmium-stress activity. The results demonstrated that the expression of OLE1 was positively correlated with cadmium stress tolerance and induction was independent of Mga2p and Spt23p (important regulatory factors for OLE1). Moreover, in response to cadmium stress, cellular levels of monounsaturated fatty acids were increased. The addition of exogenous unsaturated fatty acids simulated overexpression of OLE1, leading to cadmium resistance. Such regulation of OLE1 in the synthesis of unsaturated fatty acids may serve as a positive feedback mechanism to help cells counter the lipid peroxidation and cytoplasmic membrane damage caused by cadmium. IMPORTANCE A S. cerevisiae gene encoding a delta-9 desaturase, OLE1, was associated with high anti-cadmium-stress activity. The data suggest that the regulation of OLE1 in the synthesis of unsaturated fatty acids may serve as a positive feedback mechanism to help yeast cells counter the lipid peroxidation and cytoplasmic membrane damage caused by cadmium. The discovery of OLE1 involvement in membrane stability may indicate a novel defense strategy against cadmium stress.
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Affiliation(s)
- Zhijia Fang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Zhongxiang Chen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Song Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Ping Shi
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yuhu Shen
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province, China
| | - Youshang Zhang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Junhua Xiao
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Zhiwei Huang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
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Garcia-Santos S, Monteiro S, Malakpour-Kolbadinezhad S, Fontaínhas-Fernandes A, Wilson J. Effects of Cd injection on osmoregulation and stress indicators in freshwater Nile tilapia. Comp Biochem Physiol C Toxicol Pharmacol 2015; 167:81-9. [PMID: 25236868 DOI: 10.1016/j.cbpc.2014.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 08/31/2014] [Accepted: 09/03/2014] [Indexed: 10/24/2022]
Abstract
Freshwater tilapia (Oreochromis niloticus) were intraperitoneally injected with sublethal doses of cadmium (1.25 or 2.5 mg Cd kg(-1) body mass) and sampled after 1, 4 and 7 days in order to evaluate the mechanisms of Cd toxicity at physiological and biochemical levels. Cd levels were significantly elevated in the gill and kidney following injection however levels in the kidney continued to accumulate while levels in the gill either did not change or decreased with time. Cd caused a generalized stress condition as indicated by an increase in blood glucose, lactate and cortisol levels as well as an oxidative stress indicated by increases in lipid peroxidation and protein carbonyl content. Furthermore, tilapia exhibited impairment in their osmoregulatory status based on the fall in plasma sodium levels. Concerning ion regulatory disruption, the kidney was the most affected organ since there was a generalized increase in renal Na(+)/K(+)-ATPase activity after 1 day of exposure to Cd followed by a significant decrease in day 7. This study provides some insights into the mechanisms of Cd toxicity at physiological and biochemical levels and complements previously reported findings on O. niloticus. The disruption of ion homeostasis, alterations in Na(+)/K(+)-ATPase activity and oxidative damage are the effects of Cd exposure that can be integrated in a comprehensive model for Cd impacts.
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Affiliation(s)
- Sofia Garcia-Santos
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences - CITAB, University of Trás-os-Montes and Alto Douro - UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal.
| | - Sandra Monteiro
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences - CITAB, University of Trás-os-Montes and Alto Douro - UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
| | | | - António Fontaínhas-Fernandes
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences - CITAB, University of Trás-os-Montes and Alto Douro - UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Jonathan Wilson
- Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Rua dos Bragas 289, 4050-123 Porto, Portugal
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