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Lu LF, Li ZC, Zhang C, Chen DD, Han KJ, Zhou XY, Wang XL, Li XY, Zhou L, Li S. Zebrafish TMEM47 is an effective blocker of IFN production during RNA and DNA virus infection. J Virol 2023; 97:e0143423. [PMID: 37882518 PMCID: PMC10688382 DOI: 10.1128/jvi.01434-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 09/25/2023] [Indexed: 10/27/2023] Open
Abstract
IMPORTANCE Mitochondrial antiviral signaling protein (MAVS) and stimulator of interferon (IFN) genes (STING) are key adaptor proteins required for innate immune responses to RNA and DNA virus infection. Here, we show that zebrafish transmembrane protein 47 (TMEM47) plays a critical role in regulating MAVS- and STING-triggered IFN production in a negative feedback manner. TMEM47 interacted with MAVS and STING for autophagic degradation, and ATG5 was essential for this process. These findings suggest the inhibitory function of TMEM47 on MAVS- and STING-mediated signaling responses during RNA and DNA virus infection.
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Affiliation(s)
- Long-Feng Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhuo-Cong Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Can Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Dan-Dan Chen
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ke-Jia Han
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xiao-Yu Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xue-Li Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xi-Yin Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Hubei Hongshan Laboratory, the Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Li Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Hubei Hongshan Laboratory, the Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Shun Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
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Van Dycke J, Dai W, Stylianidou Z, Li J, Cuvry A, Roux E, Li B, Rymenants J, Bervoets L, de Witte P, Liu H, Neyts J, Rocha-Pereira J. A Novel Class of Norovirus Inhibitors Targeting the Viral Protease with Potent Antiviral Activity In Vitro and In Vivo. Viruses 2021; 13:v13091852. [PMID: 34578432 PMCID: PMC8472913 DOI: 10.3390/v13091852] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/08/2021] [Accepted: 09/11/2021] [Indexed: 12/15/2022] Open
Abstract
Human noroviruses (HuNoVs) are the most common cause of viral gastroenteritis resulting annually in ~219,000 deaths and a societal cost of ~USD 60 billion, and no antivirals or vaccines are available. Here, we assess the anti-norovirus activity of new peptidomimetic aldehydes related to the protease inhibitor rupintrivir. The early hit compound 4 inhibited the replication of murine norovirus (MNV) and the HuNoV GI.1 replicon in vitro (EC50 ~1 µM) and swiftly cleared the HuNoV GI.1 replicon from the cells. Compound 4 still inhibits the proteolytic activity. We selected a resistant GI.1 replicon, with a mutation (I109V) in a highly conserved region of the viral protease, conferring a low yield of resistance against compound 4 and rupintrivir. After testing new derivatives, compound 10d was the most potent (EC50 nanomolar range). Molecular docking indicated that the aldehyde group of compounds 4 and 10d bind with Cys139 in the HuNoV 3CL protease by a covalent linkage. Finally, compound 10d inhibited the replication of HuNoV GII.4 in infected zebrafish larvae, and PK studies in mice showed an adequate profile.
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Affiliation(s)
- Jana Van Dycke
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Wenhao Dai
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; (W.D.); (J.L.); (B.L.)
| | - Zoe Stylianidou
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Jian Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; (W.D.); (J.L.); (B.L.)
- College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Qixia District, Nanjing 210023, China
| | - Arno Cuvry
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Emma Roux
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Bingqian Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; (W.D.); (J.L.); (B.L.)
| | - Jasper Rymenants
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Lindsey Bervoets
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Peter de Witte
- Laboratory for Molecular Biodiscovery, KU Leuven–Department of Pharmaceutical and Pharmacological Sciences, 3000 Leuven, Belgium;
| | - Hong Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; (W.D.); (J.L.); (B.L.)
- Correspondence: (H.L.); (J.R.-P.)
| | - Johan Neyts
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
| | - Joana Rocha-Pereira
- Laboratory of Virology and Chemotherapy, KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, 3000 Leuven, Belgium; (J.V.D.); (Z.S.); (A.C.); (E.R.); (J.R.); (L.B.); (J.N.)
- Correspondence: (H.L.); (J.R.-P.)
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Postlethwait JH, Massaquoi MS, Farnsworth DR, Yan YL, Guillemin K, Miller AC. The SARS-CoV-2 receptor and other key components of the Renin-Angiotensin-Aldosterone System related to COVID-19 are expressed in enterocytes in larval zebrafish. Biol Open 2021; 10:bio058172. [PMID: 33757938 PMCID: PMC8015242 DOI: 10.1242/bio.058172] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 01/08/2023] Open
Abstract
People with underlying conditions, including hypertension, obesity, and diabetes, are especially susceptible to negative outcomes after infection with coronavirus SARS-CoV-2, which causes COVID-19. Hypertension and respiratory inflammation are exacerbated by the Renin-Angiotensin-Aldosterone System (RAAS), which normally protects from rapidly dropping blood pressure via Angiotensin II (Ang II) produced by the enzyme Ace. The Ace paralog Ace2 degrades Ang II, counteracting its chronic effects, and serves as the SARS-CoV-2 receptor. Ace, the coronavirus, and COVID-19 comorbidities all regulate Ace2, but we do not yet understand how. To exploit zebrafish (Danio rerio) to help understand the relationship of the RAAS to COVID-19, we must identify zebrafish orthologs and co-orthologs of human RAAS genes and understand their expression patterns. To achieve these goals, we conducted genomic and phylogenetic analyses and investigated single cell transcriptomes. Results showed that most human RAAS genes have one or more zebrafish orthologs or co-orthologs. Results identified a specific type of enterocyte as the specific site of expression of zebrafish orthologs of key RAAS components, including Ace, Ace2, Slc6a19 (SARS-CoV-2 co-receptor), and the Angiotensin-related peptide cleaving enzymes Anpep (receptor for the common cold coronavirus HCoV-229E), and Dpp4 (receptor for the Middle East Respiratory Syndrome virus, MERS-CoV). Results identified specific vascular cell subtypes expressing Ang II receptors, apelin, and apelin receptor genes. These results identify genes and cell types to exploit zebrafish as a disease model for understanding mechanisms of COVID-19.
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Affiliation(s)
| | | | | | - Yi-Lin Yan
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Karen Guillemin
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA
| | - Adam C Miller
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
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Tan MTH, Li Y, Eshaghi Gorji M, Gong Z, Li D. Fucoidan But Not 2'-Fucosyllactose Inhibits Human Norovirus Replication in Zebrafish Larvae. Viruses 2021; 13:v13030461. [PMID: 33799811 PMCID: PMC8001738 DOI: 10.3390/v13030461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/05/2021] [Accepted: 03/09/2021] [Indexed: 12/16/2022] Open
Abstract
Human noroviruses (hNoVs) cause heavy disease burden worldwide and there is no clinically approved vaccination or antiviral hitherto. In this study, with the use of a zebrafish larva in vivo platform, we investigated the anti-hNoV potentials of fucoidan (from brown algae Fucus vesiculosus) and 2'-Fucosyllactose (2'-FL). As a result, although both fucoidan and 2'-FL were able to block hNoV GII.4 virus-like particle (VLPs) from binding to type A saliva as expected, only fucoidan, but not 2'-FL, was able to inhibit the replication of hNoV GII.P16-GII.4 in zebrafish larvae, indicating the possible needs of higher molecular weights for fucosylated carbohydrates to exert anti-hNoV effect.
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Affiliation(s)
- Malcolm Turk Hsern Tan
- Department of Food Science & Technology, Faculty of Science, National University of Singapore, Singapore 119077, Singapore; (M.T.H.T.); (M.E.G.)
| | - Yan Li
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 119077, Singapore; (Y.L.); (Z.G.)
| | - Mohamad Eshaghi Gorji
- Department of Food Science & Technology, Faculty of Science, National University of Singapore, Singapore 119077, Singapore; (M.T.H.T.); (M.E.G.)
| | - Zhiyuan Gong
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 119077, Singapore; (Y.L.); (Z.G.)
| | - Dan Li
- Department of Food Science & Technology, Faculty of Science, National University of Singapore, Singapore 119077, Singapore; (M.T.H.T.); (M.E.G.)
- Correspondence:
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Tian J, Zhang Y, Zhu R, Wu Y, Liu X, Wang X. Red elemental selenium (Se 0 ) improves the immunoactivities of EPC cells, crucian carp and zebrafish against spring viraemia of carp virus. J Fish Biol 2021; 98:208-218. [PMID: 33000466 DOI: 10.1111/jfb.14571] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/27/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Selenium, as an essential trace element, interferes through selenoproteins in many physiological processes of plants and mammals. Its antiviral activity has recently attracted much attention because selenium improves the antiviral capacity of animal cells against a few viruses relevant to human diseases. In this study, the red elemental selenium was purified from the fermentative culture of Herbaspirillum camelliae WT00C and then used to culture epithelioma papulosum cyprinid (EPC) cells or feed crucian carp and zebrafish. Finally, its antiviral effects were investigated at the cell level and living fishes after spring viraemia of carp virus infection. At the cell level, 5, 10 and 20 μg ml-1 red elemental selenium significantly induced the expression of interferon (IFN) and ISG15 genes in EPC cells. The viral TCID50 (50% tissue culture infective dose) values in the EPC cells incubated with 5, 10 and 20 μg ml-1 red elemental selenium were significantly less than those of the control. More expression of IFN and ISG15 genes and less TCID50 values indicate that red elemental selenium indeed improves the antiviral capability of EPC cells. In the crucian carp fed with the food containing 5 and 10 μg g-1 red elemental selenium, IFN expressions showed 13- and 39-fold increases at the 16th day of post-injection, and its expression was dependent on selenium concentrations. Meanwhile, no fish death occurred in all the experimental groups. In the zebrafish fed with the red worm containing 5 μg g-1 red elemental selenium, IFN and Mx expressions and survival rate were significantly higher than those of the control. The results of this study show that red elemental selenium indeed improves the antiviral activity of fish. The antiviral effects of selenium mainly come from its immune regulation through its incorporation into selenoproteins. The optimum level of selenium contributes to improving fish immunity, whereas excess selenium causes excessive immune and inflammatory responses.
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Affiliation(s)
- Jinbao Tian
- State Key Laboratory of Biocatalysis and Enzyme Engineering, The Faculty of Life Science, Hubei University, Wuhan, China
| | - Yong Zhang
- Xianning Central Hospital, Tongji Xianning Hospital, Xianning, China
| | - Rong Zhu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, The Faculty of Life Science, Hubei University, Wuhan, China
| | - Yeqing Wu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, The Faculty of Life Science, Hubei University, Wuhan, China
| | - Xiaoxiao Liu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, The Faculty of Life Science, Hubei University, Wuhan, China
| | - Xingguo Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, The Faculty of Life Science, Hubei University, Wuhan, China
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Mojzesz M, Klak K, Wojtal P, Adamek M, Podlasz P, Chmielewska-Krzesinska M, Matras M, Reichert M, Chadzinska M, Rakus K. Viral infection-induced changes in the expression profile of non-RLR DExD/H-box RNA helicases (DDX1, DDX3, DHX9, DDX21 and DHX36) in zebrafish and common carp. Fish Shellfish Immunol 2020; 104:62-73. [PMID: 32526283 DOI: 10.1016/j.fsi.2020.06.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
In mammals, several non-RLR DExD/H-box RNA helicases are involve in sensing of viral nucleic acids and activation of antiviral immune response, however their role in the immune defense of fish is much less known. In this study, the expression profile of non-RLR DExD/H-box RNA helicase genes: ddx1, ddx3, dhx9, ddx21 and dhx36, was studied in zebrafish (Danio rerio) and common carp (Cyprinus carpio L.) during infection with two RNA viruses: spring viremia of carp virus (SVCV) and Chum salmon reovirus (CSV). Bioinformatic analysis of the amino acid sequences of the core helicase of DDX1, DDX3, DHX9, DDX21 and DHX36 in zebrafish and common carp revealed presence of all conserved motifs found amongst all other species, with the exception of common carp DHX9 which do not possess motif V. The transcripts of studied DExD/H-box RNA helicases were found in zebrafish ZF4 cell line as well as in all studied organs from zebrafish and common carp. The expression study demonstrated the up-regulation of the expression of selected non-RLR DExD/H-box RNA helicases during viral infections in ZF4 cell line (in vitro study) and in zebrafish and common carp organs (in vivo study). DDX1 was the only DExD/H-box RNA helicase which expression was repetitively up-regulated during in vivo infections with SVCV and CSV in zebrafish and SVCV in common carp. In ZF4 cells and kidney of common carp, viral infection-induced up-regulation of DExD/H-box RNA helicases preceded the up-regulation of type I IFN gene. Our results suggest that studied non-RLR DExD/H-box RNA helicases might be involved in antiviral immune response in fish.
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Affiliation(s)
- Miriam Mojzesz
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland
| | - Katarzyna Klak
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland
| | - Paulina Wojtal
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland
| | - Mikolaj Adamek
- Fish Disease Research Unit, Institute for Parasitology, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hannover, Germany
| | - Piotr Podlasz
- Department of Pathophysiology, Forensic Veterinary and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury, Michała Oczapowskiego 13, 10-719, Olsztyn, Poland
| | - Malgorzata Chmielewska-Krzesinska
- Department of Pathophysiology, Forensic Veterinary and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury, Michała Oczapowskiego 13, 10-719, Olsztyn, Poland
| | - Marek Matras
- Department of Fish Diseases, National Veterinary Research Institute, Partyzantow 57, 24-100, Pulawy, Poland
| | - Michal Reichert
- Department of Fish Diseases, National Veterinary Research Institute, Partyzantow 57, 24-100, Pulawy, Poland
| | - Magdalena Chadzinska
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland
| | - Krzysztof Rakus
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland.
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Nikapitiya C, Dananjaya SHS, Edirisinghe SL, Chandrarathna HPSU, Lee J, De Zoysa M. Development of phage delivery by bioencapsulation of artemia nauplii with Edwardsiella tarda phage (ETP-1). Braz J Microbiol 2020; 51:2153-2162. [PMID: 32651888 DOI: 10.1007/s42770-020-00324-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 06/20/2020] [Indexed: 11/26/2022] Open
Abstract
This study proposed that phage-enriched artemia could be a useful tool for transferring phage into the cultured fish (larvae or adult) as a feed, and introduce mode of phage administration and its safety in concern of tissue adaptation for efficient phage therapy in aquatic animals. First, whether Edwardsiella tarda phage (ETP-1) could attach or ingest by the artemia and optimum time period for the ETP-1 enrichment with artemia were investigated. ETP-1 dispersion, abundance and persistency, and zebrafish immune transcriptional responses and histopathology were evaluated after feeding the fish with ETP-1-enriched artemia. Hatched artemia nauplii (36 h) were enriched with 1.90 × 1011 PFUmL-1 of ETP-1, and maintained at 25 °C. The highest enrichment level was obtained after 4 h (3.00 × 109 PFUmL-1), and artemia were alive and active similar to control for 8 h. ETP-1 disseminated dose dependently to all the tissues rapidly (12 h). However, when feeding discontinued, it drastically decreased at day 3 with high abundance and persistency in the spleen (1.02 × 103) followed by the kidney (4.00 × 101) and the gut (1 × 101 PFUmL-1) for highest ETP-1-enriched artemia dose. In contrast, during continuous delivery of ETP-1-enriched artemia, ETP-1 detected in all the tissues (at day 10: gut; 1.90 × 107, kidney; 3.33 × 106, spleen; 5.52 × 105, liver; 6.20 × 104 PFUmL-1mg-1 tissues). Though the phage abundance varied, results indicated that oral fed ETP-1-enriched artemia disperse to the neighboring organs, even the absence of host as phage carrier. Non-significant differences of immune transcriptional and histopathology analysis between ETP-1-enriched artemia fed and controls suggest that no adverse apparent immune stimulation in host occurred, and use of ETP-1 at 1011 PFUmL-1 was safe. With further supportive studies, live artemia-mediated phage delivery method could be used as a promising tool during phage therapy against pathogenic bacteria to control aquatic diseases.
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Affiliation(s)
- Chamilani Nikapitiya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - S H S Dananjaya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Shan Lakmal Edirisinghe
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - H P S U Chandrarathna
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Jehee Lee
- Fish Vaccine Research Center, Jeju National University, Jeju, Jeju Self-Governing Province, 63243, Republic of Korea.
- Department of Marine Life Sciences, Jeju National University, Jeju, Jeju Self-Governing Province, 63243, Republic of Korea.
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea.
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Pereiro P, Álvarez-Rodríguez M, Valenzuela-Muñoz V, Gallardo-Escárate C, Figueras A, Novoa B. RNA-Seq analysis reveals that spring viraemia of carp virus induces a broad spectrum of PIM kinases in zebrafish kidney that promote viral entry. Fish Shellfish Immunol 2020; 99:86-98. [PMID: 32004617 DOI: 10.1016/j.fsi.2020.01.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
PIM kinases are a family of serine/threonine protein kinases that potentiate the progression of the cell cycle and inhibit apoptosis. Because of this, they are considered to be proto-oncogenes, and they represent an interesting target for the development of anticancer drugs. In mammals, three PIM kinases exist (PIM-1, PIM-2 and PIM-3), and different inhibitors have been developed to block their activity. In addition to their involvement in cancer, some publications have reported that the PIM kinases have pro-viral activity, and different mechanisms where PIM kinases favour viral infections have been proposed. Zebrafish possess more than 300 Pim kinase members in their genome, and by using RNA-Seq analysis, we found a high number of Pim kinase genes that were significantly induced after infection with spring viraemia of carp virus (SVCV). Moreover, analysis of the miRNAs modulated by this infection revealed that some of them could be involved in the post-transcriptional regulation of Pim kinase abundance. To elucidate the potential role of the 16 overexpressed Pim kinases in the infectivity of SVCV, we used three different pan-PIM kinase inhibitors (SGI-1776, INCB053914 and AZD1208), and different experiments were conducted both in vitro and in vivo. We observed that the PIM kinase inhibitors had a protective effect against SVCV, indicating that, similar to what is observed in mammals, PIM kinases are beneficial for the virus in zebrafish. Moreover, zebrafish Pim kinases seem to facilitate viral entry into the host cells because when ZF4 cells were pre-incubated with the virus and then were treated with the inhibitors, the protective effect of the inhibitors was abrogated. Although more investigation is necessary, these results show that pan-PIM kinase inhibitors could serve as a useful treatment for preventing the spread of viral diseases.
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Affiliation(s)
- Patricia Pereiro
- Institute of Marine Research (IIM), National Research Council (CSIC), Eduardo Cabello, 6, 36208, Vigo, Spain; Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, P.O. Box 160-C, Concepción, Chile
| | - Margarita Álvarez-Rodríguez
- Institute of Marine Research (IIM), National Research Council (CSIC), Eduardo Cabello, 6, 36208, Vigo, Spain
| | - Valentina Valenzuela-Muñoz
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, P.O. Box 160-C, Concepción, Chile
| | - Cristian Gallardo-Escárate
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, P.O. Box 160-C, Concepción, Chile
| | - Antonio Figueras
- Institute of Marine Research (IIM), National Research Council (CSIC), Eduardo Cabello, 6, 36208, Vigo, Spain
| | - Beatriz Novoa
- Institute of Marine Research (IIM), National Research Council (CSIC), Eduardo Cabello, 6, 36208, Vigo, Spain.
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Librán-Pérez M, Pereiro P, Figueras A, Novoa B. Antiviral activity of palmitic acid via autophagic flux inhibition in zebrafish (Danio rerio). Fish Shellfish Immunol 2019; 95:595-605. [PMID: 31676430 DOI: 10.1016/j.fsi.2019.10.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/11/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
Fatty acids (FAs) are key elements that affect not only growth but also different immune functions, and therefore, nutrition is important for growing healthy fish. Zebrafish (Danio rerio) is a good model for assessing the beneficial effects of immunostimulants, including FAs, before applying them in aquaculture. Accordingly, this study evaluated the effects of palmitic acid (PA) treatment on different immune parameters of zebrafish and on the mortality caused by the spring viremia of carp virus (SVCV). The results suggest that PA modulates the infection outcome in vivo, which benefits zebrafish and results in reduced mortality and viral titres. The antiviral protection elicited by this FA seems to be associated with the inhibition of autophagy and is independent of other immune processes, such as neutrophil proliferation or type I interferon (IFN) activity. The use of PA as an immunostimulant at low concentrations showed great potential in the prevention of SVCV infections; therefore, this FA could help to prevent the mortality and morbidity caused by viral agents in aquacultured fish. Nevertheless, the potentially detrimental effects of suppressing autophagy in the organism should be taken into account.
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Affiliation(s)
- Marta Librán-Pérez
- Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208, Vigo, Spain
| | - Patricia Pereiro
- Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208, Vigo, Spain
| | - Antonio Figueras
- Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208, Vigo, Spain
| | - Beatriz Novoa
- Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208, Vigo, Spain.
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10
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Van Dycke J, Ny A, Conceição-Neto N, Maes J, Hosmillo M, Cuvry A, Goodfellow I, Nogueira TC, Verbeken E, Matthijnssens J, de Witte P, Neyts J, Rocha-Pereira J. A robust human norovirus replication model in zebrafish larvae. PLoS Pathog 2019; 15:e1008009. [PMID: 31536612 PMCID: PMC6752765 DOI: 10.1371/journal.ppat.1008009] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 07/29/2019] [Indexed: 01/15/2023] Open
Abstract
Human noroviruses (HuNoVs) are the most common cause of foodborne illness, with a societal cost of $60 billion and 219,000 deaths/year. The lack of robust small animal models has significantly hindered the understanding of norovirus biology and the development of effective therapeutics. Here we report that HuNoV GI and GII replicate to high titers in zebrafish (Danio rerio) larvae; replication peaks at day 2 post infection and is detectable for at least 6 days. The virus (HuNoV GII.4) could be passaged from larva to larva two consecutive times. HuNoV is detected in cells of the hematopoietic lineage and the intestine, supporting the notion of a dual tropism. Antiviral treatment reduces HuNoV replication by >2 log10, showing that this model is suited for antiviral studies. Zebrafish larvae constitute a simple and robust replication model that will largely facilitate studies of HuNoV biology and the development of antiviral strategies.
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Affiliation(s)
- Jana Van Dycke
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Virology and Chemotherapy, Leuven, Belgium
| | - Annelii Ny
- KU Leuven–Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Molecular Biodiscovery, Leuven, Belgium
| | - Nádia Conceição-Neto
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Clinical and Epidemiological Virology, Leuven, Belgium
| | - Jan Maes
- KU Leuven–Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Molecular Biodiscovery, Leuven, Belgium
| | - Myra Hosmillo
- University of Cambridge–Department of Pathology, Division of Virology, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Arno Cuvry
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Virology and Chemotherapy, Leuven, Belgium
| | - Ian Goodfellow
- University of Cambridge–Department of Pathology, Division of Virology, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Tatiane C. Nogueira
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Virology and Chemotherapy, Leuven, Belgium
| | - Erik Verbeken
- KU Leuven–Department of Imaging & Pathology, Translational Cell & Tissue Research, Leuven, Belgium
| | - Jelle Matthijnssens
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Clinical and Epidemiological Virology, Leuven, Belgium
| | - Peter de Witte
- KU Leuven–Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Molecular Biodiscovery, Leuven, Belgium
| | - Johan Neyts
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Virology and Chemotherapy, Leuven, Belgium
- Global Virus Network (GVN), Centers of Excellence
| | - Joana Rocha-Pereira
- KU Leuven–Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory of Virology and Chemotherapy, Leuven, Belgium
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11
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Cao L, Wu XM, Nie P, Chang MX. The negative regulation of piscine CD44c in viral and bacterial infection. Dev Comp Immunol 2019; 96:135-143. [PMID: 30885554 DOI: 10.1016/j.dci.2019.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 03/12/2019] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
CD44 gene is a cell surface receptor which undergoes complex alternative splicing and extensive post-translational modifications. Although many studies have showed that CD44 is involved in the process of host defense, the function of piscine CD44 in antibacterial or antiviral defense response remains unclear. In the present study, we report the functional characterization of zebrafish CD44c, which is more similar to CD44b antigen isoforms rather than CD44a based on amino acid composition and phylogenetic analysis. The expression of zebrafish CD44c was inducible in response to bacterial and viral infections. During SVCV infection, the in vivo studies revealed that CD44c overexpression led to the increased virus loads and decreased survival rate. The attenuated response by zebrafish CD44c in response to SVCV infection were characterized by the impaired production of inflammatory cytokines and the impaired expressions of IFNs, IFN-stimulated genes, MHC class I and II genes. During Edwardsiella piscicida infection, the overexpression of zebrafish CD44c facilitated bacterial growth and dissemination, but did not impact on larvae survival. The detrimental role of CD44c in host defense against E. piscicida infection was supported by a decreased production of several antibacterial molecules including defbl2, defbl3, NK-lysin and RNase3. All together, these results firstly demonstrate the negative regulation of piscine CD44c in viral and bacterial infection.
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Affiliation(s)
- Lu Cao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xiao Man Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan, Hubei Province, China; University of Chinese Academy of Sciences, Beijing, China
| | - Ming Xian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan, Hubei Province, China; University of Chinese Academy of Sciences, Beijing, China.
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12
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Rakus K, Adamek M, Mojżesz M, Podlasz P, Chmielewska-Krzesińska M, Naumowicz K, Kasica-Jarosz N, Kłak K, Rakers S, Way K, Steinhagen D, Chadzińska M. Evaluation of zebrafish (Danio rerio) as an animal model for the viral infections of fish. J Fish Dis 2019; 42:923-934. [PMID: 30920010 DOI: 10.1111/jfd.12994] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/28/2019] [Accepted: 03/01/2019] [Indexed: 06/09/2023]
Abstract
Zebrafish (Danio rerio) is a laboratory model organism used in different areas of biological research including studies of immune response and host-pathogen interactions. Thanks to many biological tools available, zebrafish becomes also an important model in aquaculture research since several fish viral infection models have been developed for zebrafish. Here, we have evaluated the possible use of zebrafish to study infections with fish viruses that have not yet been tested on this model organism. In vitro studies demonstrated that chum salmon reovirus (CSV; aquareovirus A) and two alloherpesviruses cyprinid herpesvirus 1 (CyHV-1) and cyprinid herpesvirus 3 (CyHV-3) are able to replicate in zebrafish cell lines ZF4 and SJD.1. Moreover, CSV induced a clear cytopathic effect and up-regulated the expression of antiviral genes vig-1 and mxa in both cell lines. In vivo studies demonstrated that both CSV and CyHV-3 induce up-regulation of vig-1 and mxa expression in kidney and spleen of adult zebrafish after infection by i.p. injection but not in larvae after infection by immersion. CyHV-3 is eliminated quickly from fish; therefore, virus clearing process could be evaluated, and in CSV-infected fish, a prolonged confrontation of the host with the pathogen could be studied.
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Affiliation(s)
- Krzysztof Rakus
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Mikołaj Adamek
- Fish Disease Research Unit, Institute for Parasitology, University of Veterinary Medicine, Hannover, Germany
| | - Miriam Mojżesz
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Piotr Podlasz
- Department of Pathophysiology, Forensic Veterinary and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Małgorzata Chmielewska-Krzesińska
- Department of Pathophysiology, Forensic Veterinary and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Karolina Naumowicz
- Department of Pathophysiology, Forensic Veterinary and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Natalia Kasica-Jarosz
- Department of Animal Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Katarzyna Kłak
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Sebastian Rakers
- Working Group Aquatic Cell Technology and Aquaculture, Fraunhofer Research Institution for Marine Biotechnology and Cell Technology, Lübeck, Germany
| | - Keith Way
- Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Weymouth, UK
| | - Dieter Steinhagen
- Fish Disease Research Unit, Institute for Parasitology, University of Veterinary Medicine, Hannover, Germany
| | - Magdalena Chadzińska
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
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13
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Zhu S, Huang AG, Luo F, Li J, Li J, Zhu L, Zhao L, Zhu B, Ling F, Wang GX. Application of Virus Targeting Nanocarrier Drug Delivery System in Virus-Induced Central Nervous System Disease Treatment. ACS Appl Mater Interfaces 2019; 11:19006-19016. [PMID: 31067406 DOI: 10.1021/acsami.9b06365] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Virus-induced central nervous system (CNS) diseases represent a significant burden to animal health worldwide. The difficulty in treating these diseases is mainly attributable to the elaborate barrier system, which limits the transport of drugs to the infected sites. Therefore, it is necessary to develop smart delivery technologies for treatment of these diseases. In the study, viral nervous necrosis disease was studied as a model to evaluate the feasibility of multiwalled carbon nanotubes (MWCNTs) conjugated with virus-specific nanobody and antiviral drug for targeted therapy of virus-induced CNS diseases. The virus (named as PGNNV) was isolated, identified and purified from diseased grouper. A naïve phage-displayed alpaca nanobody library was constructed, and the purified PGNNV was used for biopanning of PGNNV-specific nanobody from the library. The targeted delivery system based on MWCNTs conjugated with polyethylenimine, ribavirin, and PGNNV-specific nanobody was constructed and designated as MWCNTs-PEI-R-Nb. Targeting ability and treatment effects of the MWCNTs-PEI-R-Nb were checked both in vitro and in vivo. MWCNTs-PEI-R-Nb showed an increasing distribution in PGNNV-infected cells, and an obvious accumulation in the brain of PGNNV-infected zebrafish larvae. MWCNTs-PEI-R-Nb also showed a strong anti-PGNNV ability both in vitro and in vivo. The mortality of larvae treated with MWCNTs-PEI-R-Nb (equivalent to 100 mg/L ribavirin) was 27% during 10 days post infection, whereas it was 100% for the control group. The results so far indicate that MWCNTs conjugated with antiviral drugs and viral-specific antibody are effective means for virus-induced CNS disease targeted therapy.
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Affiliation(s)
- Song Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Ai-Guo Huang
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Fei Luo
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Jian Li
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Jing Li
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Long Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Liang Zhao
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Bin Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Fei Ling
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
| | - Gao-Xue Wang
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China
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14
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Cho SY, Protzman RA, Kim YO, Vaidya B, Oh MJ, Kwon J, Kim D. Elucidation of mechanism for host response to VHSV infection at varying temperatures in vitro and in vivo through proteomic analysis. Fish Shellfish Immunol 2019; 88:244-253. [PMID: 30802632 DOI: 10.1016/j.fsi.2019.02.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 01/31/2019] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Seasonal temperature has a major influence on the infectivity of pathogens and the host immune system. Viral hemorrhagic septicemia virus (VHSV) is one such pathogen that only causes the mortality of fish at low temperatures. This study aims to discover the host defense mechanism and pathway for resistance to VHSV at higher temperatures. We first observed the VHSV infection patterns at low and higher temperatures in fathead minnow (FHM) cells (20 °C and 28 °C) and zebrafish (15 °C and 25 °C). In comparison to the 20 °C infection, FHM cells infected at 28 °C showed decreased apoptosis, increased cell viability, and reduced VHSV N gene expression. In zebrafish, infection at 25 °C caused no mortality and significantly reduced the N gene copy number in comparison to infection at 15 °C. To explore the antiviral infection mechanisms induced by high temperature in vitro and in vivo, the changes in the proteomic profile were measured through UPLC-MSE analysis. ACADL, PTPN6, TLR1, F7, A2M, and GLI2 were selected as high temperature-specific biomarkers in the FHM cell proteome; and MYH9, HPX, ANTXR1, APOA1, HBZ, and MYH7 were selected in zebrafish. Increased immune response, anticoagulation effects, and the formation of lymphocytes from hematopoietic stem cells were analyzed as functions that were commonly induced by high temperature in vitro and in vivo. Among these biomarkers, GLI2 was predicted as an upstream regulator. When treated with GANT58, a GLI-specific inhibitor, cell viability was further reduced due to GLI2 inhibition during VHSV infection at varying temperatures in FHM cells, and the mortality in zebrafish was induced earlier at the low temperature. Overall, this study discovered a new mechanism for VHSV infection in vitro and in vivo that is regulated by GLI2 protein.
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Affiliation(s)
- Se-Young Cho
- Biological Disaster Analysis Group, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
| | - Rachael A Protzman
- Biological Disaster Analysis Group, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea; Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Yeong O Kim
- Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Bipin Vaidya
- Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Myung-Joo Oh
- Department of Aqualife Medicine, College of Fisheries and Ocean Science, Chonnam National University, Yeosu, 59626, Republic of Korea
| | - Joseph Kwon
- Biological Disaster Analysis Group, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea.
| | - Duwoon Kim
- Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea.
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15
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Langevin C, Boudinot P, Collet B. IFN Signaling in Inflammation and Viral Infections: New Insights from Fish Models. Viruses 2019; 11:v11030302. [PMID: 30917538 PMCID: PMC6466407 DOI: 10.3390/v11030302] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 12/20/2022] Open
Abstract
The overarching structure of the type I interferon (IFN) system is conserved across vertebrates. However, the variable numbers of whole genome duplication events during fish evolution offer opportunities for the expansion, diversification, and new functionalization of the genes that are involved in antiviral immunity. In this review, we examine how fish models provide new insights about the implication of virus-driven inflammation in immunity and hematopoiesis. Mechanisms that have been discovered in fish, such as the strong adjuvant effect of type I IFN that is used with DNA vaccination, constitute good models to understand how virus-induced inflammatory mechanisms can interfere with adaptive responses. We also comment on new discoveries regarding the role of pathogen-induced inflammation in the development and guidance of hematopoietic stem cells in zebrafish. These findings raise issues about the potential interferences of viral infections with the establishment of the immune system. Finally, the recent development of genome editing provides new opportunities to dissect the roles of the key players involved in the antiviral response in fish, hence enhancing the power of comparative approaches.
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Affiliation(s)
- Christelle Langevin
- INRA, Virologie et Immunologie Moléculaires, Université Paris-Saclay, 78352 Jouy-en-Josas, France.
| | - Pierre Boudinot
- INRA, Virologie et Immunologie Moléculaires, Université Paris-Saclay, 78352 Jouy-en-Josas, France.
| | - Bertrand Collet
- INRA, Virologie et Immunologie Moléculaires, Université Paris-Saclay, 78352 Jouy-en-Josas, France.
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16
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Bello-Perez M, Falco A, Novoa B, Perez L, Coll J. Hydroxycholesterol binds and enhances the anti-viral activities of zebrafish monomeric c-reactive protein isoforms. PLoS One 2019; 14:e0201509. [PMID: 30653529 PMCID: PMC6336239 DOI: 10.1371/journal.pone.0201509] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 12/28/2018] [Indexed: 01/26/2023] Open
Abstract
C-reactive proteins (CRPs) are among the faster acute-phase inflammation-responses proteins encoded by one gene (hcrp) in humans and seven genes (crp1-7) in zebrafish (Danio rerio) with importance in bacterial and viral infections. In this study, we described novel preferential bindings of 25-hydroxycholesterol (25HOCh) to CRP1-7 compared with other lipids and explored the antiviral effects of both 25HOCh and CRP1-7 against spring viremia carp virus (SVCV) infection in zebrafish. Both in silico and in vitro results confirmed the antiviral effect of 25HOCh and CRP1-7 interactions, thereby showing that the crosstalk between them differed among the zebrafish isoforms. The presence of oxidized cholesterols in human atherosclerotic plaques amplifies the importance that similar interactions may occur for vascular and/or neurodegenerative diseases during viral infections. In this context, the zebrafish model offers a genetic tool to further investigate these interactions.
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Affiliation(s)
- Melissa Bello-Perez
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández (IBMC-UMH), Elche, Spain
| | - Alberto Falco
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández (IBMC-UMH), Elche, Spain
| | - Beatriz Novoa
- Institute of Marine Research (IIM), CSIC, Vigo, Spain
| | - Luis Perez
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández (IBMC-UMH), Elche, Spain
| | - Julio Coll
- Department of Biotechnology, Instituto Nacional Investigaciones y Tecnologías Agrarias y Alimentarias, INIA, Madrid, Spain
- * E-mail:
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17
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Shen YF, Liu L, Feng CZ, Hu Y, Chen C, Wang GX, Zhu B. Synthesis and antiviral activity of a new coumarin derivative against spring viraemia of carp virus. Fish Shellfish Immunol 2018; 81:57-66. [PMID: 29981474 DOI: 10.1016/j.fsi.2018.07.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 06/18/2018] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Coumarin as a lead structure have received a considerable attention in the last three decades for the discovery of antiviral agents. Our previous study indicated that imidazole coumarins possessed antiviral activities against SVCV. Based on the structure-activity relationship in that study, a new imidazole coumarin derivative, 7-(4-benzimidazole-butoxy)-coumarin (BBC), was designed, synthesized and its anti-SVCV activity was evaluated. By comparing inhibitory concentration at half-maximal activity (IC50), we found that BBC (IC50 = 0.56 mg/L) possessed a higher antiviral activity than those imidazole coumarins in our previous study. Besides, BBC can significantly inhibit cell death and reduce cellular morphological damage induced by SVCV. Our further data indicated that intraperitoneal injection of BBC increased the survival rate of zebrafish by 17.5%, decreased viral titer in fish body and inhibited SVCV glycoprotein expression in kidney and spleen. In uninfected zebrafish, the expression levels of ifnγ, ifnφ1, ifnφ2 and rig1 genes were up-regulated after BBC treatment, which indicated that BBC could activate interferon response. In addition, data of the antioxidant enzymes activities and results of the antioxidant enzymes-related genes expressions suggested BBC could reduce SVCV-induced oxidative damage in infected zebrafish. Altogether, BBC is expected to be a therapeutic agent against SVCV infection in the field of aquaculture.
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Affiliation(s)
- Yu-Feng Shen
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Lei Liu
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, 315211, China
| | - Chen-Zhang Feng
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Yang Hu
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Cheng Chen
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Gao-Xue Wang
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
| | - Bin Zhu
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
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18
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Abstract
Zebrafish (Danio rerio) has become an increasingly important model for in vivo and in vitro studies on host-pathogen interaction, offering scientists with optical accessibility and genetic tractability, and a vertebrate-type immunity that can be separated into innate and adaptive ones. Although it is shown in previous studies that few species of viruses can naturally infect zebrafish, the spring viraemia of carp virus (SVCV), a rhabdovirus that causes contagious acute hemorrhagic viraemia in a variety of cyprinid fishes, can infect zebrafish by both injection and static immersion methods in laboratory conditions. In addition, SVCV can infect zebrafish fibroblast cell line (ZF4 cells), together with the Epithelioma papulosum cyprini (EPC) cell line (EPC cells), a common cell line used widely in fish disease research. The infection and propagation of SVCV in zebrafish and especially in these cell lines can be employed conveniently in laboratory for functional assays of zebrafish genes. The zebrafish, ZF4 and EPC cell, and SVCV can serve as a simple and efficient model system in understanding host-virus interactions. In the present chapter, we provide detailed protocols for the host-virus interaction analysis based on zebrafish embryos, ZF4/EPC cells, and SVCV, including infection methods of zebrafish embryos and cell lines, analyses of immune responses by quantitative PCR (qPCR) and RNA sequencing (RNA-Seq), antiviral assays based on ZF4 and EPC cells, and the analysis of host-virus interaction using luciferase assays. These protocols should provide efficient and typical means to address host-virus interactions in a more general biological sense.
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Affiliation(s)
- Peng Fei Zou
- College of Fisheries, Jimei University, 43 Yindou Road, Xiamen, Fujian Province, 361021, China
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China.
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19
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Martín V, Mavian C, López Bueno A, de Molina A, Díaz E, Andrés G, Alcami A, Alejo A. Establishment of a Zebrafish Infection Model for the Study of Wild-Type and Recombinant European Sheatfish Virus. J Virol 2015; 89:10702-6. [PMID: 26246565 PMCID: PMC4580169 DOI: 10.1128/jvi.01580-15] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 07/29/2015] [Indexed: 01/05/2023] Open
Abstract
Amphibian-like ranaviruses include pathogens of fish, amphibians, and reptiles that have recently evolved from a fish-infecting ancestor. The molecular determinants of host range and virulence in this group are largely unknown, and currently fish infection models are lacking. We show that European sheatfish virus (ESV) can productively infect zebrafish, causing a lethal pathology, and describe a method for the generation of recombinant ESV, establishing a useful model for the study of fish ranavirus infections.
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Affiliation(s)
- Verónica Martín
- Centro de Investigación en Sanidad Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Valdeolmos, Spain
| | - Carla Mavian
- Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid), Madrid, Spain
| | - Alberto López Bueno
- Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid), Madrid, Spain
| | - Antonio de Molina
- Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Eduardo Díaz
- Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Germán Andrés
- Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid), Madrid, Spain
| | - Antonio Alcami
- Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid), Madrid, Spain
| | - Alí Alejo
- Centro de Investigación en Sanidad Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Valdeolmos, Spain
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20
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Nie L, Zhang YS, Dong WR, Xiang LX, Shao JZ. Involvement of zebrafish RIG-I in NF-κB and IFN signaling pathways: insights into functional conservation of RIG-I in antiviral innate immunity. Dev Comp Immunol 2015; 48:95-101. [PMID: 25265425 DOI: 10.1016/j.dci.2014.09.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 09/22/2014] [Accepted: 09/23/2014] [Indexed: 06/03/2023]
Abstract
The retinoic acid-inducible gene I (RIG-I) is a critical sensor for host recognition of RNA virus infection and initiation of antiviral signaling pathways in mammals. However, data on the occurrence and functions of this molecule in lower vertebrates are limited. In this study, we characterized an RIG-I homolog (DrRIG-I) from zebrafish. Structurally, this DrRIG-I shares a number of conserved functional domains/motifs with its mammalian counterparts, namely, caspase activation and recruitment domain, DExD/H box, a helicase domain, and a C-terminal domain. Functionally, stimulation with DrRIG-I CARD in zebrafish embryos significantly activated the NF-κB and IFN signaling pathways, leading to the expression of TNF-α, IL-8 and IFN-induced Mx, ISG15, and viperin. However, knockdown of TRIM25 (a pivotal activator for RIG-I receptors) significantly suppressed the induced activation of IFN signaling. Results suggested the functional conservation of RIG-I receptors in the NF-κB and IFN signaling pathways between teleosts and mammals, providing a perspective into the evolutionary history of RIG-I-mediated antiviral innate immunity.
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Affiliation(s)
- Li Nie
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou 310058, China
| | - Ying-sheng Zhang
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou 310058, China
| | - Wei-ren Dong
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou 310058, China
| | - Li-xin Xiang
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou 310058, China.
| | - Jian-zhong Shao
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou 310058, China.
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21
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Ruyra A, Torrealba D, Morera D, Tort L, MacKenzie S, Roher N. Zebrafish liver (ZFL) cells are able to mount an anti-viral response after stimulation with Poly (I:C). Comp Biochem Physiol B Biochem Mol Biol 2014; 182:55-63. [PMID: 25536407 DOI: 10.1016/j.cbpb.2014.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 12/06/2014] [Accepted: 12/13/2014] [Indexed: 11/17/2022]
Abstract
The zebrafish (Danio rerio) is a widely used model species for biomedical research and is also starting to be a model for aquaculture research. The ZFL cell line, established from zebrafish liver, has been mostly used in toxicological and ecotoxicological studies. However, no studies have previously characterised this cell line in regard to its immunological response. The aim of this work was to study the gene expression response of the ZFL cell line after incubation with different prototypical immune stimuli, such as lipopolysaccharide (LPS), peptidoglycan (PGN), zymosan, and with a special focus on the dsRNA Poly (I:C). Using PCR, microarrays, and confocal microscopy we have explored the response of the ZFL cells against Poly (I:C). This study shows that the ZFL is able to uptake very efficiently the Poly (I:C) and mount a strong anti-viral response. We can conclude that ZFL could be used not only in toxicological studies, but also in studying anti-viral responses in zebrafish.
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Affiliation(s)
- Angels Ruyra
- Institut de Biotecnologia i de Biomedicina - Parc de Recerca UAB, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Debora Torrealba
- Institut de Biotecnologia i de Biomedicina - Parc de Recerca UAB, Universitat Autònoma de Barcelona, Bellaterra, Spain; Departament de Biologia Cel·lular, Fisiologia Animal i Immunologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Davinia Morera
- Institut de Biotecnologia i de Biomedicina - Parc de Recerca UAB, Universitat Autònoma de Barcelona, Bellaterra, Spain; Departament de Biologia Cel·lular, Fisiologia Animal i Immunologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Lluís Tort
- Departament de Biologia Cel·lular, Fisiologia Animal i Immunologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Simon MacKenzie
- Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, United Kingdom
| | - Nerea Roher
- Institut de Biotecnologia i de Biomedicina - Parc de Recerca UAB, Universitat Autònoma de Barcelona, Bellaterra, Spain; Departament de Biologia Cel·lular, Fisiologia Animal i Immunologia, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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Varela M, Diaz-Rosales P, Pereiro P, Forn-Cuní G, Costa MM, Dios S, Romero A, Figueras A, Novoa B. Interferon-induced genes of the expanded IFIT family show conserved antiviral activities in non-mammalian species. PLoS One 2014; 9:e100015. [PMID: 24950240 PMCID: PMC4065003 DOI: 10.1371/journal.pone.0100015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 05/21/2014] [Indexed: 12/24/2022] Open
Abstract
Interferon-induced proteins with tetratricopeptide repeats (IFITs) are involved in the protective response to viral infection, although the precise mechanism of IFITs for reducing viral proliferation is currently unknown. The interaction with the translation initiation factor eIF-3 or viral proteins and the sequestering of viral RNA have been proposed as potential antiviral functions for these proteins. In humans, four members of this family have been characterized. Nevertheless, information about these proteins in fish is almost non-existent. Exploiting the conservation of synteny between human and zebrafish genomes, we have identified ten members of the IFIT family located on four different chromosomes. The induction of these genes was examined both in vitro and in vivo after interferon (IFN) administration and rhabdovirus challenge. Whereas an induction of IFIT genes was observed after interferon treatments (IFNΦ1, IFNΦ2 and IFNΦ3), the viral infection did not affect these IFN-induced genes in vitro, and even reduced the IFN-induced expression of these genes. The response was largely different in vivo, with a broad up-regulation of IFIT genes after viral challenge. In addition, three selected IFITs were cloned in an expression vector and microinjected into zebrafish larvae to examine the protective effect of IFITs upon viral infection. Reduction in the mortality rate was observed confirming a conserved antiviral function in non-mammalian species.
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Affiliation(s)
- Mónica Varela
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain
| | | | | | | | - Maria M. Costa
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain
| | - Sonia Dios
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain
| | | | | | - Beatriz Novoa
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain
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Gabor KA, Stevens CR, Pietraszewski MJ, Gould TJ, Shim J, Yoder JA, Lam SH, Gong Z, Hess ST, Kim CH. Super resolution microscopy reveals that caveolin-1 is required for spatial organization of CRFB1 and subsequent antiviral signaling in zebrafish. PLoS One 2013; 8:e68759. [PMID: 23874753 PMCID: PMC3706321 DOI: 10.1371/journal.pone.0068759] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 06/03/2013] [Indexed: 12/13/2022] Open
Abstract
Understanding spatial distribution and dynamics of receptors within unperturbed membranes is essential for elucidating their role in antiviral signaling, but conventional studies of detergent-resistant membrane fractions cannot provide this information. Caveolae are integral to numerous signaling pathways and these membrane domains have been previously implicated in viral entry but not antiviral defense. This study shows, for the first time, the importance of spatio-temporal regulation of signaling receptors and the importance of the regulation of clustering for downstream signaling. A novel mechanism for virus evasion of host cell defenses is demonstrated through disruption of clusters of signaling molecules organized within caveolin-rich domains. Viral infection leads to a downregulation in Caveolin-1b (Cav-1b), disrupting clusters of CRFB1, a zebrafish type I interferon receptor (-R) subunit. Super-resolution microscopy has enabled the first single-molecule imaging of CRFB1 association with cav-1b-containing membrane domains. Strikingly, downregulation of Cav-1b, the major protein component of caveolae, caused CRFB1 clusters to disperse. Dispersal of CRFB1 clusters led to a suppressed antiviral immune response both in vitro and in vivo, through abrogation of downstream signaling. This response strongly suggests that CRFB1 organization within cav-1b-containing membrane domains is critical for IFN-mediated antiviral defense and presents a previously undescribed antiviral evasion strategy to alter IFN signaling and the antiviral immune response.
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Affiliation(s)
- Kristin A. Gabor
- Graduate School of Biomedical Sciences, University of Maine, Orono, Maine, United States of America
- Department of Molecular and Biomedical Sciences, University of Maine, Orono, Maine, United States of America
- Department of Physics and Astronomy, University of Maine, Orono, Maine, United States of America
| | - Chad R. Stevens
- Department of Molecular and Biomedical Sciences, University of Maine, Orono, Maine, United States of America
| | - Matthew J. Pietraszewski
- Department of Molecular and Biomedical Sciences, University of Maine, Orono, Maine, United States of America
| | - Travis J. Gould
- Department of Physics and Astronomy, University of Maine, Orono, Maine, United States of America
| | - Juyoung Shim
- Department of Molecular and Biomedical Sciences, University of Maine, Orono, Maine, United States of America
| | - Jeffrey A. Yoder
- Department of Molecular and Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Siew Hong Lam
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Zhiyuan Gong
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Samuel T. Hess
- Graduate School of Biomedical Sciences, University of Maine, Orono, Maine, United States of America
- Department of Physics and Astronomy, University of Maine, Orono, Maine, United States of America
- * E-mail: (STH); (CHK)
| | - Carol H. Kim
- Graduate School of Biomedical Sciences, University of Maine, Orono, Maine, United States of America
- Department of Molecular and Biomedical Sciences, University of Maine, Orono, Maine, United States of America
- * E-mail: (STH); (CHK)
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Abstract
Parasites provide a selective pressure during the evolution of their hosts, and mediate a range of effects on ecological communities. Due to their short generation time, host-parasite interactions may also drive the virulence of opportunistic bacteria. This is especially relevant in systems where high densities of hosts and parasites on different trophic levels (e.g. vertebrate hosts, their bacterial pathogens, and virus parasitizing bacteria) co-exist. In farmed salmonid fingerlings, Flavobacterium columnare is an emerging pathogen, and phage that infect F. columnare have been isolated. However, the impact of these phage on their host bacterium is not well understood. To study this, four strains of F. columnare were exposed to three isolates of lytic phage and the development of phage resistance and changes in colony morphology were monitored. Using zebrafish (Danio rerio) as a model system, the ancestral rhizoid morphotypes were associated with a 25-100% mortality rate, whereas phage-resistant rough morphotypes that lost their virulence and gliding motility (which are key characteristics of the ancestral types), did not affect zebrafish survival. Both morphotypes maintained their colony morphologies over ten serial passages in liquid culture, except for the low-virulence strain, Os06, which changed morphology with each passage. To our knowledge, this is the first report of the effects of phage-host interactions in a commercially important fish pathogen where phage resistance directly correlates with a decline in bacterial virulence. These results suggest that phage can cause phenotypic changes in F. columnare outside the fish host, and antagonistic interactions between bacterial pathogens and their parasitic phage can favor low bacterial virulence under natural conditions. Furthermore, these results suggest that phage-based therapies can provide a disease management strategy for columnaris disease in aquaculture.
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Affiliation(s)
- Elina Laanto
- Centre of Excellence in Biological Interactions, Universities of Jyväskylä and Helsinki, Finland
- Department of Biological and Environmental Science and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Jaana K. H. Bamford
- Centre of Excellence in Biological Interactions, Universities of Jyväskylä and Helsinki, Finland
- Department of Biological and Environmental Science and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Jouni Laakso
- Centre of Excellence in Biological Interactions, Universities of Jyväskylä and Helsinki, Finland
- Department of Biosciences, University of Helsinki, Helsinki, Finland
| | - Lotta-Riina Sundberg
- Centre of Excellence in Biological Interactions, Universities of Jyväskylä and Helsinki, Finland
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
- * E-mail:
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Ding CB, Zhang JP, Zhao Y, Peng ZG, Song DQ, Jiang JD. Zebrafish as a potential model organism for drug test against hepatitis C virus. PLoS One 2011; 6:e22921. [PMID: 21857967 PMCID: PMC3152561 DOI: 10.1371/journal.pone.0022921] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Accepted: 07/01/2011] [Indexed: 01/04/2023] Open
Abstract
Screening and evaluating anti- hepatitis C virus (HCV) drugs in vivo is difficult worldwide, mainly because of the lack of suitable small animal models. We investigate whether zebrafish could be a model organism for HCV replication. To achieve NS5B-dependent replication an HCV sub-replicon was designed and created with two vectors, one with HCV ns5b and fluorescent rfp genes, and the other containing HCV's 5′UTR, core, 3′UTR and fluorescent gfp genes. The vectors containing sub-replicons were co-injected into zebrafish zygotes. The sub-replicon amplified in liver showing a significant expression of HCV core RNA and protein. The sub-replicon amplification caused no abnormality in development and growth of zebrafish larvae, but induced gene expression change similar to that in human hepatocytes. As the amplified core fluorescence in live zebrafish was detectable microscopically, it rendered us an advantage to select those with replicating sub-replicon for drug experiments. Ribavirin and oxymatrine, two known anti-HCV drugs, inhibited sub-replicon amplification in this model showing reduced levels of HCV core RNA and protein. Technically, this method had a good reproducibility and is easy to operate. Thus, zebrafish might be a model organism to host HCV, and this zebrafish/HCV (sub-replicon) system could be an animal model for anti-HCV drug screening and evaluation.
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Affiliation(s)
- Cun-Bao Ding
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- College of Chemical Engineering and Biotechnology, Hebei Polytechnic University, Tangshan, Hebei, People's Republic of China
| | - Jing-Pu Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- * E-mail: (JDJ); (JPZ)
| | - Ye Zhao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zong-Gen Peng
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Dan-Qing Song
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jian-Dong Jiang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- * E-mail: (JDJ); (JPZ)
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Wang WL, Liu W, Gong HY, Hong JR, Lin CC, Wu JL. Activation of cytokine expression occurs through the TNFα/NF-κB-mediated pathway in birnavirus-infected cells. Fish Shellfish Immunol 2011; 31:10-21. [PMID: 21272652 DOI: 10.1016/j.fsi.2011.01.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 01/10/2011] [Accepted: 01/16/2011] [Indexed: 05/30/2023]
Abstract
The infectious pancreatic necrosis virus (IPNV) belongs to the Birnaviridae family of viruses and causes acute contagious diseases in a number of economically important freshwater and marine fish. In this study, we infected zebrafish embryonic cells (ZF4) with IPNV and analyzed the gene expression patterns of normal and infected cells using quantitative real-time PCR. We identified a number of immune response genes, including ifna, ifng, mx, irf1, irf2, irf4, tnfa, tnfb, il-1b, il-15, il-26, ccl4 and mmp family genes, that are induced after viral infection. Transcriptional regulators, including cebpb, junb, nfkb and stat1, stat4 and stat5, were also upregulated in IPNV-infected cells. In addition, we used Pathway Studio software to identify TNFα as having the greatest downstream influence among these altered genes. Treating virus-infected cells with an siRNA targeting TNFα inhibited NF-κB expression. To further interrupt the TNFα/NF-κB-mediated pathway, the expression levels of cytokines and metalloproteinases were inhibited in IPNV-infected cells. These data suggest that, during IPNV infection, the expression of cytokines and metalloproteinases might be initiated through the TNFα/NF-κB-mediated pathway. The modulation of TNFα/NF-κB-related mechanisms may provide a therapeutic strategy for inhibiting viral infection in teleosts.
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Affiliation(s)
- Wei-Lun Wang
- Institute of Cellular and Organismic Biology, Academia Sinica, Nankang 115, Taipei, Taiwan
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27
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Xiong XP, Dong CF, Xu X, Weng SP, Liu ZY, He JG. Proteomic analysis of zebrafish (Danio rerio) infected with infectious spleen and kidney necrosis virus. Dev Comp Immunol 2011; 35:431-440. [PMID: 21075138 DOI: 10.1016/j.dci.2010.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 11/07/2010] [Accepted: 11/07/2010] [Indexed: 05/30/2023]
Abstract
Iridovirus infections remain a severe problem in aquaculture industries worldwide. Infectious spleen and kidney necrosis virus (ISKNV), the type species of the genus Megalocytovirus in the family Iridoviridae, has caused significant economic losses among freshwater fish in different Asian countries. To investigate the molecular mechanism of iridoviral pathogenesis, we analyzed the differential proteome from the spleen of ISKNV-infected zebrafish through two-dimensional gel electrophoresis (2-DE). Mass spectrometry revealed 35 altered cellular protein spots, including 15 upregulated proteins and 20 downregulated proteins at five days post-infection. The altered host proteins were classified into 13 categories based on their biological processes: cytoskeletal protein, stress response, lipoprotein metabolism, ubiquitin-proteasome pathway, carbohydrate metabolism, signal transduction, proteolysis, ion binding, transport, metabolic process, catabolic process, biosynthesis, and oxidation reduction. Moreover, 14 corresponding genes of the differentially expressed proteins were validated by RT-PCR. Western blot analysis further demonstrated the changes in α-tubulin, β-actin, HSC70, and major capsid protein (MCP) during infection. β-Actin was selected for further study via co-immunoprecipitation analyses, which confirmed that the cellular β-actin interacts with the MCP protein of ISKNV in the infected zebrafish. These findings provide insight into the interactions between iridoviruses (especially ISKNV) and host, as well as the mechanism and pathogenesis of ISKNV infections.
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Affiliation(s)
- Xiao-Peng Xiong
- State Key Laboratory of Biocontrol/MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
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28
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López-Muñoz A, Sepulcre MP, Roca FJ, Figueras A, Meseguer J, Mulero V. Evolutionary conserved pro-inflammatory and antigen presentation functions of zebrafish IFNγ revealed by transcriptomic and functional analysis. Mol Immunol 2011; 48:1073-83. [PMID: 21354627 DOI: 10.1016/j.molimm.2011.01.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 01/26/2011] [Accepted: 01/31/2011] [Indexed: 11/17/2022]
Abstract
In mammals, IFNγ is the only type II IFN member, whereas most bony fish species have two IFNγ genes, namely IFNγ1 and IFNγ2. We report that both zebrafish IFNγ genes were unable to protect zebrafish larvae against viral infection, despite the fact that they moderately induced the expression of antiviral genes, strongly induced pro-inflammatory and antigen processing and presentation genes, and increased neutrophil numbers. Although both zebrafish IFNγs induced a similar set of immune genes, IFNγ1 was more powerful at inducing pro-inflammatory genes than IFNγ2, which correlated with its ability to promote larval death. Strikingly, IFNγ1-induced larval death was prevented by genetic ablation of the myeloid transcription factor SPI1 but not IL-1β or TNFα, suggesting that professional phagocytes are also one of the main targets of IFNγ in fish. In addition, the usefulness of the zebrafish for the identification of IFNγ-target genes is illustrated by the identification of several genes whose expression is also regulated in murine macrophages by IFNγ, namely two membrane-spanning 4-domain family members and the opioid growth factor receptor. Finally, we found for the first time that the thymic specific proteasome subunit PSMB11/β5t is regulated by IFNγ. Collectively, our data throw light on partially redundant functions of fish IFNγ genes, demonstrate that the pro-inflammatory and antigen presentation functions of IFNγ have been conserved during vertebrate evolution, and highlight the fact that zebrafish is an excellent model for studying IFNγ biology.
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Affiliation(s)
- Azucena López-Muñoz
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain
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29
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Ludwig M, Palha N, Torhy C, Briolat V, Colucci-Guyon E, Brémont M, Herbomel P, Boudinot P, Levraud JP. Whole-body analysis of a viral infection: vascular endothelium is a primary target of infectious hematopoietic necrosis virus in zebrafish larvae. PLoS Pathog 2011; 7:e1001269. [PMID: 21304884 PMCID: PMC3033377 DOI: 10.1371/journal.ppat.1001269] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Accepted: 01/03/2011] [Indexed: 12/25/2022] Open
Abstract
The progression of viral infections is notoriously difficult to follow in whole organisms. The small, transparent zebrafish larva constitutes a valuable system to study how pathogens spread. We describe here the course of infection of zebrafish early larvae with a heat-adapted variant of the Infectious Hematopoietic Necrosis Virus (IHNV), a rhabdovirus that represents an important threat to the salmonid culture industry. When incubated at 24 °C, a permissive temperature for virus replication, larvae infected by intravenous injection died within three to four days. Macroscopic signs of infection followed a highly predictable course, with a slowdown then arrest of blood flow despite continuing heartbeat, followed by a loss of reactivity to touch and ultimately by death. Using whole-mount in situ hybridization, patterns of infection were imaged in whole larvae. The first infected cells were detectable as early as 6 hours post infection, and a steady increase in infected cell number and staining intensity occurred with time. Venous endothelium appeared as a primary target of infection, as could be confirmed in fli1:GFP transgenic larvae by live imaging and immunohistochemistry. Disruption of the first vessels took place before arrest of blood circulation, and hemorrhages could be observed in various places. Our data suggest that infection spread from the damaged vessels to underlying tissue. By shifting infected fish to a temperature of 28 °C that is non-permissive for viral propagation, it was possible to establish when virus-generated damage became irreversible. This stage was reached many hours before any detectable induction of the host response. Zebrafish larvae infected with IHNV constitute a vertebrate model of an hemorrhagic viral disease. This tractable system will allow the in vivo dissection of host-virus interactions at the whole organism scale, a feature unrivalled by other vertebrate models.
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Affiliation(s)
- Marion Ludwig
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
| | - Nuno Palha
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
| | - Corinne Torhy
- Virologie et Immunologie Moléculaire, INRA, Jouy-en-Josas, France
| | - Valérie Briolat
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
| | - Emma Colucci-Guyon
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
| | - Michel Brémont
- Virologie et Immunologie Moléculaire, INRA, Jouy-en-Josas, France
| | - Philippe Herbomel
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
| | - Pierre Boudinot
- Virologie et Immunologie Moléculaire, INRA, Jouy-en-Josas, France
| | - Jean-Pierre Levraud
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris, France
- CNRS URA2578, Paris, France
- * E-mail:
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Dios S, Romero A, Chamorro R, Figueras A, Novoa B. Effect of the temperature during antiviral immune response ontogeny in teleosts. Fish Shellfish Immunol 2010; 29:1019-1027. [PMID: 20728541 DOI: 10.1016/j.fsi.2010.08.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 07/23/2010] [Accepted: 08/15/2010] [Indexed: 05/29/2023]
Abstract
Zebrafish were used to investigate the expression levels of several antiviral and inflammatory genes (IL-1β, iNOS, TNF-α, TLR3, IFN-I, IFNγ, IRF3, MDA-5, Mx) constitutively and after viral stimulation during early development. We also determined how their expression was affected by changes in the temperature. The antiviral genes were almost completely inhibited at 15°C with the exception of TLR3. In contrast, IL-1β, iNOS and TNF-α expression was not obviously different between the two temperatures. At 15°C, most of the genes examined did not differ following stimulation with poly I:C or viral hemorrhagic septicemia virus (VHSV). However, at 28°C, all of the genes showed significant differences in at least some of the sampling points after poly I:C treatment with the largest differences observed for Mx. Mx expression in adult zebrafish was not significantly altered by temperature and poly I:C treatment led to a smaller increase in gene expression when compared to larval Mx levels. Thus, Mx seems to play an important role in viral immunity in larvae, when the adaptive immune response is not fully functional.
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Affiliation(s)
- Sonia Dios
- Instituto de Investigaciones Marinas (IIM), Consejo Superior de Investigaciones Científicas (CSIC), Vigo, Spain
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Abstract
This chapter describes a method for generation of the high-titer pseudotyped Moloney murine leukemia virus (MLV) that efficiently infects zebrafish embryos (i.e., more than 25 retroviral copies per cell). Injection techniques are also described for production of the retrovirus-infected mosaic "founder" fish. We describe a quantitative PCR (qPCR)-based assay as a quick way to assess the infectivity after each round of viral production and injection. Most of the required equipment is commercially available and commonly present in most research laboratories.
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Affiliation(s)
- Li-En Jao
- Cell and Developmental Biology, Vanderbilt University, TN, Nashville, USA
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Levraud JP, Boudinot P, Colin I, Benmansour A, Peyrieras N, Herbomel P, Lutfalla G. Identification of the Zebrafish IFN Receptor: Implications for the Origin of the Vertebrate IFN System. J Immunol 2007; 178:4385-94. [PMID: 17371995 DOI: 10.4049/jimmunol.178.7.4385] [Citation(s) in RCA: 182] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The recent description of virus-induced fish IFNs has raised questions about the evolution of this complex antiviral system. Identification of the receptor of the zebrafish virus-induced IFN (zIFN) was sought to help resolve these questions. We set up an experimental system to study the zIFN system in the course of a viral infection of zebrafish embryos. In this setting, zIFN was induced by viral infection, and we identified zIFN-dependent induced transcripts. Embryos quickly died from the infection, but zIFN overexpression increased their survival. We took advantage of this experimental system to perform in vivo loss and gain of function analysis of candidate receptors of the class II helical receptor family and identified zCRFB1 and zCRFB5 as the two subunits of the zebrafish IFN receptor. Based on the organization of the zIFN gene and the protein structure of the identified receptor components, the virus-induced fish IFNs appear as orthologs of mammalian IFN-lambda, specifying type III IFN as the ancestral antiviral system of vertebrates.
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Affiliation(s)
- Jean-Pierre Levraud
- Macrophages et Développement de l'Immunité, Centre National de la Recherche Scientifique, Institut Pasteur, Paris, France
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Novoa B, Romero A, Mulero V, Rodríguez I, Fernández I, Figueras A. Zebrafish (Danio rerio) as a model for the study of vaccination against viral haemorrhagic septicemia virus (VHSV). Vaccine 2006; 24:5806-16. [PMID: 16777275 DOI: 10.1016/j.vaccine.2006.05.015] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 05/04/2006] [Accepted: 05/05/2006] [Indexed: 11/30/2022]
Abstract
The rhabdovirus viral haemorrhagic septicemia virus (VHSV) is the etiological agent of one of the most important salmonid viral diseases. In the present work, the ability of VHSV to infect and replicate in zebrafish at low temperature (15 degrees C) was demonstrated. Zebrafish was also used to determine the effectiveness of the recombinant virus rIHNV-Gvhsv GFP as a live attenuated vaccine against the virulent VHSV strain. Fish intraperitoneally injected with 3 x 10(6) to 3 x 10(5)TCID50/ml of the wild type VHSV showed a 100% of cumulative mortality, meanwhile only 57% of mortality was obtained in bath infections. Infected fish showed external clinical signs and histological observations revealed the appearance of small haemorrhages in the muscle, kidney, liver and dermis. Neither mortalities nor clinical signs were recorded in fish infected with a live attenuated recombinant virus. By RT-PCR technique, VHSV was detected in all the organs as early as 24h, but the recombinant virus was not detected in all the sampled days. VHSV was able to replicate "in vitro" in head kidney cells but the replication capacity of the attenuated viral strain was limited. The recombinant virus rIHNV-Gvhsv GFP was able to protect against VHSV with a survival rate ranging from 20% to 60% depending of the vaccine dose. The increase of TLR3, IFNalphabeta, Mx, IFNgamma and TNFalpha expression at 72h post-infection in the kidney of VHSV-infected fish contrasted with the results obtained with the avirulent virus, which did not induce an increment of this expression in infected fish. Zebrafish is a suitable animal model to study VHSV infection and immune (innate and adaptive) responses and, more importantly, we demonstrate for the first time the usefulness of the zebrafish as a vaccination model to viral diseases. In addition, the high protection obtained with the live attenuated virus demonstrates that the zebrafish is able to mount an efficient antiviral immune response at 15 degrees C.
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Affiliation(s)
- Beatriz Novoa
- Instituto de Investigaciones Marinas, CSIC, Eduardo Cabello 6, 36208 Vigo, Spain.
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Abstract
The innate immune response, the first line of defense against invading pathogens, can be perturbed by environmental toxicants such as arsenic. This study reports the effects of arsenic on innate immunity of zebrafish. Respiratory burst activity, messenger RNA expression of tumor necrosis factor alpha (TNF-alpha), a primer of the respiratory burst response, and mRNA expression of the antiviral cytokines interferon (IFN) and MX, : before and after viral infection, were examined in arsenic-exposed zebrafish larvae. Respiratory burst activity and TNF-alpha expression were decreased upon arsenic exposure, indicating inhibition of TNF-alpha priming of the respiratory burst response. Arsenic enhanced IFN expression slightly over time, but reduced MX : expression. In zebrafish infected with snakehead rhabdovirus, arsenic decreased induction and altered the kinetics of IFN and MX : upon infection. Differences in IFN and MX : expression in arsenic-exposed larvae point toward an interruption of the Janus kinase-signal transducer and activator of transcription (JAK/STAT) pathway.
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Affiliation(s)
- Andrea C Hermann
- Department of Biochemistry, Microbiology, and Molecular Biology, University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA
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Abstract
In this study, the possible influence of temperature on infectious pancreatic necrosis virus (IPNV)-induced apoptosis in a zebrafish liver epithelium (ZLE) cell line was investigated. At a lower temperature (18 degrees C), there was expression of viral proteins VP2 and VP3 at 4 h post-infection (p.i.). At this time no expression was found in the high temperature group at 28 degrees C. The cell survival ratio was 52 and 18% at 24 and 48 h p.i., respectively, during IPNV infection at 18 degrees C. In addition, we assayed for apoptosis in IPNV-infected cells with terminal deoxynucleotidyl transferase (TdT)-mediated end labelling (TUNEL) of DNA at different dosages of virus. We found a ratio of apoptotic cells of 8 and 25% at 12 and 18 h p.i., respectively, in the multiplicity of infection (MOI) 1 group. The MOI 10 group had 20 and 45% apoptotic cells at 12 and 18 h, respectively. Furthermore, at 18 degrees C IPNV activated the caspase-8 and 3 from 1.5 to 2 times at 12 and 18 h p.i., respectively. Taken together, these findings suggest that successful virus replication occurs at the low temperature (18 degrees C) compared with the non-permissive temperature of 28 degrees C. Thus, IPNV replication is capable of activating caspase-8 and -3 and inducing host apoptosis.
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Affiliation(s)
- J-R Hong
- Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng-Kung University, Tainan, Taiwan
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Abstract
The zebrafish, Danio rerio, has become recognized as a valuable model for the study of development, genetics, and toxicology. Recently, the zebrafish has been recognized as a useful model for infectious disease and immunity. In this study, the pathogenesis and antiviral immune response of zebrafish to experimental snakehead rhabdovirus (SHRV) infection was characterized. Zebrafish 24 h postfertilization to 30 days postfertilization were susceptible to infection by immersion in 10(6) 50% tissue culture infective doses (TCID50) of SHRV/ml, and adult zebrafish were susceptible to infection by intraperitoneal (i.p.) injection of 10(5) TCID50 of SHRV/ml. Mortalities exceeded 40% in infected fish, and clinical presentation of infection included petechial hemorrhaging, redness of the abdomen, and erratic swim behavior. Virus reisolation and reverse transcription-PCR analysis of the viral nucleocapsid gene confirmed the presence of SHRV. Histological sections of moribund embryonic and juvenile fish revealed necrosis of the pharyngeal epithelium and liver, in addition to congestion of the swim bladder by cell debris. Histopathology in adult fish injected i.p. was confined to the site of injection. The antiviral response in zebrafish was monitored by quantitative real-time PCR analysis of zebrafish interferon (IFN) and Mx expression. IFN and Mx levels were elevated in zebrafish exposed to SHRV, although expression and intensity differed with age and route of infection. This study is the first to examine the pathogenesis of SHRV infection in zebrafish. Furthermore, this study is the first to describe experimental infection of zebrafish embryos with a viral pathogen, which will be important for future experiments involving targeted gene disruption and forward genetic screens.
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Affiliation(s)
- Peter E Phelan
- Department of Biochemistry, Microbiology, and Molecular Biology, 5735 Hitchner Hall, University of Maine, Orono, ME 04469, USA
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Alonso M, Kim CH, Johnson MC, Pressley M, Leong JA. The NV gene of snakehead rhabdovirus (SHRV) is not required for pathogenesis, and a heterologous glycoprotein can be incorporated into the SHRV envelope. J Virol 2004; 78:5875-82. [PMID: 15140985 PMCID: PMC415808 DOI: 10.1128/jvi.78.11.5875-5882.2004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Snakehead rhabdovirus (SHRV) affects warm-water fish in Southeast Asia and belongs to the genus Novirhabdovirus by virtue of its "nonvirion" (NV) gene. To examine the function of the NV gene, we used a recently developed reverse genetic system to produce a viable recombinant SHRV carrying an NV gene deletion. The recombinant virus was produced at the same rate and same final concentrations as the wild-type virus in cultured fish cells in spite of the NV gene deletion. The role of the NV protein in fish pathogenesis was also investigated. Zebra fish (Danio rerio) were infected with the NV deletion mutant or with a recombinant virus containing a copy of the SHRV genome, and similar mortality rates as well as final mortalities were recorded, suggesting no apparent role for the NV protein in fish pathogenesis. Interestingly, the unsuccessful rescue of fully viable recombinants with genomes containing deletions in the G/NV gene junction suggested a role for the gene junction in virus transcription and replication. Finally, we demonstrated that the SHRV glycoprotein can be replaced by the glycoprotein of infectious hematopoietic necrosis virus (IHNV) or by a hybrid protein composed of SHRV and IHNV sequences.
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Affiliation(s)
- Marta Alonso
- Hawaii Institute of Marine Biology, P.O. Box 1346, Kaneohe, HI 96744, USA
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Abstract
In a search for previously unknown genes that are required for lymphocyte development in zebrafish, a retroviral sequence was identified in a subtracted thymus cDNA library and in genomic DNA libraries. The provirus is 11.2 kb and contains intact open reading frames for the gag, pol, and env genes, as well as nearly identical flanking long terminal repeat sequences. As determined by in situ hybridization, the thymus appears to be a major tissue for retroviral expression in both larval and adult fish. Several viral transcripts were found by Northern blotting in the adult thymus. The provirus was found at the same genomic locus in sperm from four fish, suggesting that it is an endogenous retrovirus. Phylogenetic analysis indicates that it is closest to, yet distinct from, the cluster of murine leukemia virus-related retroviruses, suggesting that this virus represents a new group of retroviruses.
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Affiliation(s)
- Ching-Hung Shen
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Garner JN, Joshi B, Jagus R. Characterization of rainbow trout and zebrafish eukaryotic initiation factor 2alpha and its response to endoplasmic reticulum stress and IPNV infection. Dev Comp Immunol 2003; 27:217-231. [PMID: 12590973 DOI: 10.1016/s0145-305x(02)00096-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The cDNAs of rainbow trout and zebrafish eIF2alpha have been isolated and found to encode proteins of similar molecular weight and isoelectric point to the alpha-subunit of the human translational initiation factor, eIF2. The rainbow trout (36.0kDa) and zebrafish (36.2kDa) eIF2alphas share 93 and 91% identity to the human protein, respectively, and are recognized by antibodies raised to the human form. In mammals, the phosphorylation of the alpha-subunit of eIF2 plays a key role in the regulation of protein synthesis in response to a range of cellular stresses. Regions corresponding to the human phosphorylation and kinase-docking sites are identical in the proteins of both fish species, as are residues that interact with the eIF2 recycling factor, eIF2B. Moreover, both recombinant rainbow trout and zebrafish eIF2alphas can be phosphorylated in vitro by the mammalian heme-sensitive eIF2alpha-kinase, HRI/HCR, as well as the interferon-inducible, dsRNA sensitive kinase, PKR. Phosphorylation of rainbow trout and zebrafish eIF2alpha can also occur in vivo. RTG-2 and ZFL cells subjected to endoplasmic reticulum (ER) stress by treatment with the Ca(2+)-ionophore A23187 showed increased levels of eIF2alpha phosphorylation, suggesting similarity between the ER stress response in fish and other higher eukaryotes. Furthermore, RTG-2 cells responded to treatment with poly(I).poly(C) or to infection by infectious pancreatic necrosis virus, IPNV, by increasing eIF2alpha phosphorylation. These data imply that RTG-2 cells express the interferon-induced eIF2alpha-kinase, PKR and suggests that the interferon/eIF2alpha/PKR response to virus infection may be a conserved vertebrate characteristic. Overall these data are consistent with the premise that fish are able to regulate protein synthesis in response to cellular stresses through phosphorylation of eIF2alpha.
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Affiliation(s)
- Joseph N Garner
- Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, MD 21202, USA
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Chen W, Burgess S, Golling G, Amsterdam A, Hopkins N. High-throughput selection of retrovirus producer cell lines leads to markedly improved efficiency of germ line-transmissible insertions in zebra fish. J Virol 2002; 76:2192-8. [PMID: 11836396 PMCID: PMC135931 DOI: 10.1128/jvi.76.5.2192-2198.2002] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Vesicular stomatitis virus glycoprotein G-pseudotyped mouse retroviral vectors have been used as mutagens for a large-scale insertional mutagenesis screen in the zebra fish. To reproducibly generate high-titer virus stocks, we devised a method for rapidly selecting cell lines that can yield high-titer viruses and isolated a producer cell line that yields virus at a high titer on zebra fish embryos. Virus produced from this line, designated GT virus, is nontoxic following injection of zebra fish blastulae and efficiently infects embryonic cells that give rise to the future germ line. Using GT virus preparations we generated roughly 500,000 germ line-transmissible proviral insertions in a population of 25,000 founder fish in about 2 months. The GT virus contains a gene trap, and trap events can be detected in the offspring of almost every founder fish. We discuss potential applications of this highly efficient method for generating germ line-transmissible insertions in a vertebrate
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Affiliation(s)
- Wenbiao Chen
- Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Abstract
The presence of a novel form of zebrafish fibronectin (FN2) on the cell surface increased the cell's susceptibility to infection by infectious hematopoietic necrosis virus (IHNV). Unlike other fibronectins, FN2 possesses a truncated structure and accumulates on the cell surface instead of in the extracellular matrix. Fish embryo cells expressing recombinant FN2 were more susceptible to IHNV infection, with a greater percentage of cells exhibiting cytopathic effect (CPE) compared to nontransfected control cells. Incubation of nontransfected cells with soluble recombinant FN2 increased IHNV infection, as measured by plaque assay. The number of plaques increased in correlation with the amount of protein added and the length of time that cells were incubated with the protein. Incubation of IHNV with soluble FN2 before addition to cells also increased infection. FN2 immobilized on the culture surface inhibited IHNV infection. The results indicate that FN2 present on the cell surface is able to mediate IHNV attachment and cell entry.
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Affiliation(s)
- Xiangyu Liu
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA
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LaPatra SE, Barone L, Jones GR, Zon LI. Effects of infectious hematopoietic necrosis virus and infectious pancreatic necrosis virus infection on hematopoietic precursors of the zebrafish. Blood Cells Mol Dis 2000; 26:445-52. [PMID: 11112382 DOI: 10.1006/bcmd.2000.0320] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The zebrafish Danio rerio is a new model system for studying the genetics of hematopoiesis. To define naturally occurring viruses which could infect and replicate within hematopoietic precursors of the zebrafish, infectious hematopoietic necrosis virus (IHNV) and infectious pancreatic necrosis virus (IPNV) were studied. Infection of whole fish with viral supernatants demonstrated infectious replicants for both viruses, indicating that the virus host range includes the zebrafish. In other species, infection with these viruses leads to prominent hematopoietic necrosis of the head kidney, the major site of adult hematopoiesis. We detected a transient toxicity of the virus to hematopoietic precursors and terminally differentiated red cells after viral infections. The kinetics of hematopoietic defects between IHNV and IPNV infection differed; fish infected with either virus, however, recovered by 6 days postinfection. In contrast to other fish infected with the virus, hematocrit did not change appreciably during this time. These studies are the first to demonstrate IHNV and IPNV infection of the zebrafish and reveal the potential for use of such viruses for gene transfer experiments to infect zebrafish hematopoietic cells.
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Affiliation(s)
- S E LaPatra
- Research Division, Clear Springs Foods, Inc., Buhl, Idaho 83316, USA
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