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Lee Y, Nguyen TL, Roh H, Kim A, Park J, Lee JY, Kang YR, Kang H, Sohn MY, Park CI, Kim DH. Mechanisms underlying probiotic effects on neurotransmission and stress resilience in fish via transcriptomic profiling. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109063. [PMID: 37678478 DOI: 10.1016/j.fsi.2023.109063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/03/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023]
Abstract
In recent years, studies have highlighted the significant impact of probiotic treatment on the central nervous system (brain) and stress regulation through the microbiota-gut-brain axis, yet there have been limited knowledge on this axis in fish. Therefore, this study aimed to enhance the current understanding of the mechanisms underlying probiotic effects on neurotransmission and stress alleviation in fish through transcriptomic profiling. In this study, olive flounders (Paralichthys olivaceus) were subjected to two trial setups: a 1-month lab-scale trial and a 6-month field-scale trial, with and without the probiotic strain Lactococcus lactis WFLU12. RNA-Seq analysis was performed using liver samples collected from fish at one-month post-feeding (mpf) in both trials. Additionally, fish growth was monitored monthly, and serological parameters were measured at one mpf in the field-scale experiment. The results of the lab-scale trial showed that probiotic administration significantly upregulated genes related to neurotransmission, such as htr3a, mao, ddc, ntsr1, and gfra2. These findings highlight the impact of probiotics on modulating neurotransmission via the microbiota-gut-brain axis. In the field-scale experiment, fish growth was significantly promoted and the sera levels of AST, LDH, and cortisol were significantly higher in the control group compared to the probiotics group. Furthermore, genes involved in stress responses (e.g. hsp70, hsp90B1, hspE1, prdx1, and gss) and transcriptional regulators (e.g. fos, dusp1, and dusp2) exhibited significant upregulation in the control group compared to the probiotics group, indicating that probiotic administration can alleviate stress levels in fish. Overall, this study provides valuable insights into the mechanisms underlying the beneficial effects of probiotics in fish, specifically regarding their impact on neurotransmission and stress alleviation.
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Affiliation(s)
- Yoonhang Lee
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Thanh Luan Nguyen
- Department of Science and Technology, HUTECH University, Ho Chi Minh City, Viet Nam
| | - HyeongJin Roh
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Ahran Kim
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Jiyeon Park
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Ju-Yeop Lee
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Yu-Ra Kang
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Hyoyeong Kang
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Min-Young Sohn
- Department of Marine Biology and Aquaculture, College of Marine Science, Gyeongsang National University, Tongyeong, South Korea
| | - Chan-Il Park
- Department of Marine Biology and Aquaculture, College of Marine Science, Gyeongsang National University, Tongyeong, South Korea
| | - Do-Hyung Kim
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan, South Korea.
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Zhang J, Huang J, Zhao H. Molecular Cloning of Toll-like Receptor 2 and 4 ( SpTLR2, 4) and Expression of TLR-Related Genes from Schizothorax prenanti after Poly (I:C) Stimulation. Genes (Basel) 2023; 14:1388. [PMID: 37510293 PMCID: PMC10379648 DOI: 10.3390/genes14071388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
Toll-like receptor (TLR) signaling is conserved between fish and mammals, except for TLR4, which is absent in most fish. In the present study, we aimed to evaluate whether TLR4 is expressed in Schizothorax prenanti (SpTLR4). The SpTLR2 and SpTLR4 were cloned and identified, and their tissue distribution was examined. The cDNA encoding SpTLR4 and SpTLR2 complete coding sequences (CDS) were identified and cloned. Additionally, we examined the expression levels of seven SpTLRs (SpTLR2, 3, 4, 18, 22-1, 22-2, and 22-3), as well as SpMyD88 and SpIRF3 in the liver, head kidney, hindgut, and spleen of S. prenanti, after intraperitoneal injection of polyinosinic-polycytidylic acid (poly (I:C)). The SpTLR2 and SpTLR4 shared amino acid sequence identity of 42.15-96.21% and 36.21-93.58%, respectively, with sequences from other vertebrates. SpTLR2 and SpTLR4 were expressed in all S. prenanti tissues examined, particularly in immune-related tissues. Poly (I:C) significantly upregulated most of the genes evaluated in the four immune organs compared with the PBS-control (p < 0.05); expression of these different genes was tissue-specific. Our findings demonstrate that TLR2 and TLR4 are expressed in S. prenanti and that poly (I:C) affects the expression of nine TLR-related genes, which are potentially involved in S. prenanti antiviral immunity or mediating pathological processes with differential kinetics. This will contribute to a better understanding of the roles of these TLR-related genes in antiviral immunity.
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Affiliation(s)
- Jianlu Zhang
- Shaanxi Key Laboratory of Qinling Ecological Security, Shaanxi Institute of Zoology, Xi'an 710032, China
- College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China
| | - Jiqin Huang
- Shaanxi Key Laboratory of Qinling Ecological Security, Shaanxi Institute of Zoology, Xi'an 710032, China
| | - Haitao Zhao
- Shaanxi Key Laboratory of Qinling Ecological Security, Shaanxi Institute of Zoology, Xi'an 710032, China
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Sun Y, Cao Z, Zhang P, Wei C, Li J, Wu Y, Zhou Y. IFN regulatory factor 3 of golden pompano and its NLS domain are involved in antibacterial innate immunity and regulate the expression of type I interferon (IFNa3). Front Immunol 2023; 14:1128196. [PMID: 36817435 PMCID: PMC9933344 DOI: 10.3389/fimmu.2023.1128196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/23/2023] [Indexed: 02/05/2023] Open
Abstract
Introduction The transcription factor interferon regulatory factor 3 (IRF3) plays an important role in host defence against viral infections. However, its role during bacterial infection in teleosts remains unclear. In the present study, we evaluated the antibacterial effects of Trachinotus ovatus IRF3 (TroIRF3) and how it regulates type I interferon (IFN). Methods Subcellular localisation experiments, overexpression, and quantitative real-time PCR (qRT-PCR) were performed to examine the nuclear localisation signal (NLS) of TroIRF3 and its role in the antibacterial regulatory function of TroIRF3. We assessed the binding activity of TroIRF3 to the IFNa3 promoter by luciferase reporter assay. Results and Discussion The results showed that TroIRF3 was constitutively expressed at high levels in the gill and liver. TroIRF3 was significantly upregulated and transferred from the cytoplasm to the nucleus after Vibrio harveyi infection. By overexpressing TroIRF3, the fish were able to inhibit the replication of V. harveyi, whereas knocking it down increased bacterial replication. Moreover, the overexpression of TroIRF3 increased type I interferon (IFNa3) production and the IFN signalling molecules. The NLS, which is from the 64-127 amino acids of TroIRF3, contains the basic amino acids KR74/75 and RK82/84. The results proved that NLS is required for the efficient nuclear import of TroIRF3 and that the NLS domain of TroIRF3 consists of the key amino acids KR74/75 and RK82/84. The findings also showed that NLS plays a key role in the antibacterial immunity and upregulation of TroIFNa3 induced by TroIRF3. Moreover, TroIRF3 induces TroIFNa3 promoter activity, whereas these effects are inhibited when the NLS domain is deficient. Overall, our results suggested that TroIRF3 is involved in the antibacterial immunity and regulation of type I IFN in T. ovatus and that the NLS of TroIRF3 is vital for IRF3-mediated antibacterial responses, which will aid in understanding the immune role of fish IRF3.
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Affiliation(s)
- Yun Sun
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Collaborative Innovation Center of Marine Science and Technology, Hainan University, Haikou, China
| | - Zhenjie Cao
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, China
| | - Panpan Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Collaborative Innovation Center of Marine Science and Technology, Hainan University, Haikou, China
| | - Caoying Wei
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, China
| | - Jianlong Li
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Collaborative Innovation Center of Marine Science and Technology, Hainan University, Haikou, China
| | - Ying Wu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, China,*Correspondence: Ying Wu, ; Yongcan Zhou,
| | - Yongcan Zhou
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China,Collaborative Innovation Center of Marine Science and Technology, Hainan University, Haikou, China,*Correspondence: Ying Wu, ; Yongcan Zhou,
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Ma Z, Chen X, Yang R, Hu J, Zhou S, Yang Q. Identification and characterization of interferon regulatory factor 1 from Lateolabrax japonicus involved in antiviral immune response against grouper nervous necrosis virus infection. FISH & SHELLFISH IMMUNOLOGY 2020; 97:403-410. [PMID: 31874299 DOI: 10.1016/j.fsi.2019.12.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
Interferon regulatory factors (IRFs) play a key role in mediating the host response against pathogen infection and other important biological processes. In the present study, an interferon regulation factor 1 gene was identified from Lateolabrax japonicus (designated LjIRF-1), the cDNA sequence of LjIRF-1 was 1394 bp long, and with an open reading frame (ORF) of 945 bp that encodes a peptide of 314 amino acids. Bioinformatics data showed that LjIRF-1 possesses a DNA-binding domain (DBD) and two low complexity regions, which shared 56-81% identity to other fish IRF-1s. The LjIRF-1 transcripts were detectable in all examined tissues of healthy L. japonicus, with higher levels in the blood, head-kidney, intestine, gill and spleen. When challenged with grouper nervous necrosis virus (GNNV) and poly (I:C) infection, both the mRNA expression levels of LjIRF-1 and L. japonicus interferon-1 gene (designated LjIFN-1) were significantly up-regulated. Furthermore, like with poly (I:C), the active purified recombinant protein (rLjIRF-1) was also capable of increasing the expression level of LjIFN-1; controlling the copy number of GNNV under lethiferous titer (1011-1012 copies/μL) and promoting the survival rate of GNNV infected L. japonicas. Combine all the results, we deduced that LjIRF-1 is involved in defending GNNV infection by simulating LjIFN-1 signal pathway in L. japonicas.
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Affiliation(s)
- Zhenhua Ma
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China; Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture, Guangzhou, 510300, China.
| | - Xu Chen
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China
| | - Rui Yang
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China
| | - Jing Hu
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China
| | - Shengjie Zhou
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China
| | - Qibing Yang
- Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya, 572018, China
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Zang ZX, Dan C, Zhou L, Zhang QY, Gui JF, Zhang YB. Function characterization and expression regulation of two different-sized 3' untranslated region-containing interferon genes from clone F of gibel carp Carassius auratus gibelio. Mol Immunol 2020; 119:18-26. [PMID: 31954283 DOI: 10.1016/j.molimm.2020.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/07/2020] [Accepted: 01/07/2020] [Indexed: 10/25/2022]
Abstract
Fish interferon (IFN)-mediated antiviral innate immunity is the first line of defense against virus invasion. In the present study, we identify two fish IFN genes (here tentatively named IFNa and IFNc) with different-sized 3' UTRs from clone F strain of gibel carp Carassius auratus gibelio. Carp IFNa has a relatively short 3'UTR without AU-rich elements (AREs) but IFNc has a long one with 9 AREs. Functionally, carp IFNa and IFNc display significantly antiviral potential to viral infection, likely through induction of downstream IFN-stimulated genes (ISGs). Both carp IFN genes are induced by viral infection, poly(I:C) treatment and IRF3/7, which are ascribed to the IFN-sensitive response elements (ISRE) within their promoters. Carp IFN genes are also induced by each other and by themselves, indicating existence of a positive feedback loop in fish IFN-mediated antiviral immune response. Comparative analyses of 3'UTR-mediated expression regulation at mRNA and protein levels show that the ARE-containing 3'UTR of carp IFNc rather than the short 3'UTR of carp IFNa promotes mRNA decay but instead results in high-level protein expression, indicating that 3'UTR of fish IFN mRNAs might be a potential factor for regulation of IFN-mediated antiviral immune response. Considering a fact that a given protein function is largely related to its protein level, these results suggest that both promoter and 3'UTR contribute to the transcription and translation of fish IFN genes, thus shaping their eventually antiviral potential.
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Affiliation(s)
- Zhao-Xing Zang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China
| | - Cheng Dan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Li Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China; The Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qi-Ya Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China; The Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430072, China; Key Laboratory of Aquaculture Disease Control of Ministry of Agriculture, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jian-Fang Gui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China; The Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yi-Bing Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China; The Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430072, China; Key Laboratory of Aquaculture Disease Control of Ministry of Agriculture, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Zhang W, Li Z, Jia P, Liu W, Yi M, Jia K. Interferon regulatory factor 3 from sea perch (Lateolabrax japonicus) exerts antiviral function against nervous necrosis virus infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 88:200-205. [PMID: 30016710 DOI: 10.1016/j.dci.2018.07.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/13/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
Interferon (IFN) regulatory factor 3 (IRF3) is a major regulator contributing to the host away from viral infection. Here, an IRF3 gene from sea perch (LjIRF3) was identified and its role in regulating early apoptosis signaling and IFN response was investigated during red spotted grouper nervous necrosis virus (RGNNV) infection. The cDNA of LjIRF3 encoded a putative 465 amino acids protein, containing a DNA binding domain, an IRF association domain and a serine-rich domain. Phylogenetic analysis suggested that LjIRF3 shared the closest genetic relationship with Epinephelus coioides IRF3. LjIRF3 was constitutively expressed in all examined tissues with the highest expression level in the liver. Upon RGNNV infection, mRNA transcript level of LjIRF3 was significantly up-regulated in vivo and in vitro, indicating the involvement of LjIRF3 in immune response to RGNNV infection. Furthermore, overexpression of LjIRF3 significantly suppressed RGNNV replication in vitro, meanwhile significantly up-regulating the expression of IFNI and IFN stimulated genes and resulting in the activation of caspase 3 and 9 proteases in the early stage of RGNNV infection. In short, these results demonstrated that LjIRF3 exerted antiviral function against RGNNV infection via triggering early apoptotic cell death and inducing IRF3-dependent IFN immune response.
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Affiliation(s)
- Wanwan Zhang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
| | - Zelin Li
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
| | - Peng Jia
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
| | - Wei Liu
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
| | - Meisheng Yi
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
| | - Kuntong Jia
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China.
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Labella AM, Garcia-Rosado E, Bandín I, Dopazo CP, Castro D, Alonso MC, Borrego JJ. Transcriptomic Profiles of Senegalese Sole Infected With Nervous Necrosis Virus Reassortants Presenting Different Degree of Virulence. Front Immunol 2018; 9:1626. [PMID: 30065724 PMCID: PMC6056728 DOI: 10.3389/fimmu.2018.01626] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 07/02/2018] [Indexed: 01/28/2023] Open
Abstract
Betanodaviruses [nervous necrosis virus (NNV)] are the causative agent of the viral encephalopathy and retinopathy, a disease that affects cultured Senegalese sole (Solea senegalensis). NNV reassortants, combining genomic segments from redspotted grouper nervous necrosis virus (RGNNV) and striped jack nervous necrosis virus (SJNNV) genotypes, have been previously isolated from several fish species. The wild-type reassortant wSs160.03, isolated from Senegalese sole, has been proven to be more virulent to sole than the parental genotypes (RGNNV and SJNNV), causing 100% mortality. Mutations at amino acids 247 (serine to alanine) and 270 (serine to asparagine) in the wSs160.03 capsid protein have allowed us to obtain a mutant reassortant (rSs160.03247+270), which provokes a 40% mortality decrease. In this study, the RNA-Seq technology has been used to comparatively analyze Senegalese sole transcriptomes in two organs (head kidney and eye/brain) after infection with wild-type and mutant strains. A total of 633 genes were differentially expressed (DEGs) in animals infected with the wild-type isolate (with higher virulence), whereas 393 genes were differentially expressed in animals infected with the mutant strain (37.9% decrease in the number of DEGs). To study the biological functions of detected DEGs involved in NNV infection, a gene ontology (GO) enrichment analysis was performed. Different GO profiles were obtained in the following subclasses: (i) biological process; (ii) cellular component; and (iii) molecular function, for each viral strain tested. Immune response and proteolysis have been the predominant biological process after the infection with the wild-type isolate, whereas the infection with the mutant strain induces proteolysis in head kidney and inhibition of vasculogenesis in nervous tissue. Regarding the immune response, genes coding for proteins acting as mediators of type I IFN expression (DHX58, IRF3, IRF7) and IFN-stimulated genes (ISG15, Mx, PKR, Gig1, ISG12, IFI44, IFIT-1, to name a few) were upregulated in animals infected with the wild-type isolate, whereas no-differential expression of these genes was observed in samples inoculated with the mutant strain. The different transcriptomic profiles obtained could help to better understand the NNV pathogenesis in Senegalese sole, setting up the importance as virulence determinants of amino acids at positions 247 and 270 within the RNA2 segment.
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Affiliation(s)
- Alejandro M Labella
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
| | - Esther Garcia-Rosado
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
| | - Isabel Bandín
- Departamento de Microbiología y Parasitología, Instituto de Acuicultura, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Carlos P Dopazo
- Departamento de Microbiología y Parasitología, Instituto de Acuicultura, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Dolores Castro
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
| | - M Carmen Alonso
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
| | - Juan J Borrego
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
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Laghari ZA, Chen SN, Li L, Huang B, Gan Z, Zhou Y, Huo HJ, Hou J, Nie P. Functional, signalling and transcriptional differences of three distinct type I IFNs in a perciform fish, the mandarin fish Siniperca chuatsi. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 84:94-108. [PMID: 29432791 DOI: 10.1016/j.dci.2018.02.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/08/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Teleost fish are unique in having type I and type II interferons (IFNs) only, and the type I IFNs are classified into Group one and Group two based on the presence of two or four cysteines respectively, and are further classified into seven subgroups. In the present study, three distinct type I IFNs, IFNc, IFNd and IFNh, have been identified in the genome sequences of a perciform fish, the mandarin fish Siniperca chuatsi. These IFNs are induced following the stimulation of Polyinosinic polycytidylic acid (poly(I:C)) and Resiquimod (R848) either in vivo or in vitro. But, the infectious spleen and kidney necrosis virus (ISKNV) infection caused a delayed response of IFNs, which may be resulted from the viral inhibition of type I IFN production and related signalling. The three receptor subunits, cytokine receptor family B 1 (CRFB1), CRFB2 and CRFB5 are also expressed in a similar manner as observed for the IFNs, and IFNc, IFNd and IFNh use preferentially the receptor complex, CRFB2 and CRFB5, CRFB1 and CRFB5, CRFB1 and CRFB5 respectively for their effective signalling in the induction of IFN-stimulated genes (ISGs). Moreover, the IFNs are able to induce their own expression, and also the IRF3 and IRF7 expression, leading to the amplification of IFN cascade. It is further revealed that these three IFNs are transcribed differently by IRF7 and IRF3. The composition, function, signalling and transcription of type I IFNs have been investigated in detail in a teleost fish.
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Affiliation(s)
- Zubair Ahmed Laghari
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Shan Nan Chen
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Li Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Bei Huang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Zhen Gan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Ying Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Hui Jun Huo
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Jing Hou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan, Hubei Province, 430072, China; School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province, 266109, China.
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Feng J, Lin P, Wang Y, Guo S, Zhang Z, Yu L. Identification of a type I interferon (IFN) gene from Japanese eel and its expression analysis in vivo and in vitro. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.aggene.2017.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Hu Y, Yoshikawa T, Chung S, Hirono I, Kondo H. Identification of 2 novel type I IFN genes in Japanese flounder, Paralichthys olivaceus. FISH & SHELLFISH IMMUNOLOGY 2017; 67:7-10. [PMID: 28546019 DOI: 10.1016/j.fsi.2017.05.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/17/2017] [Accepted: 05/20/2017] [Indexed: 06/07/2023]
Abstract
Two novel type I interferon genes (JfIFN3 and JfIFN4) have been identified in Japanese flounder Paralichthys olivaceus. Open reading frames of JfIFN3 and JfIFN4 were 555bp and 528bp, encoding 184aa and 175aa, respectively. The genomic structures of JfIFN3 and JfIFN4 are composed of 5 exons and 4 introns. JfIFN4 has 2 conserved cysteine residues, while JfIFN3 has 4. JfIFN3 and JfIFN4 showed the highest amino acid sequence identities to turbot IFN1 (74%) and IFN2 (62%), respectively. Interestingly, JfIFN3 and JfIFN4 were clustered in distinct branches with JfIFN1 and JfIFN2, which have reported so far. The mRNA levels of JfIFN4 were apparently increased in the kidney and spleen at 3 h after ployI:C injection, while JfIFN1-3 were not detected by RT-PCR.
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Affiliation(s)
- Yiwen Hu
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan; National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, No. 1 of Haida Street, Zhoushan, Zhejiang 316022, China
| | - Takaki Yoshikawa
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan
| | - Seangmin Chung
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan
| | - Ikuo Hirono
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan
| | - Hidehiro Kondo
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan.
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Alternative Pre-mRNA Splicing in Mammals and Teleost Fish: A Effective Strategy for the Regulation of Immune Responses Against Pathogen Infection. Int J Mol Sci 2017; 18:ijms18071530. [PMID: 28714877 PMCID: PMC5536018 DOI: 10.3390/ijms18071530] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/10/2017] [Accepted: 07/12/2017] [Indexed: 12/14/2022] Open
Abstract
Pre-mRNA splicing is the process by which introns are removed and the protein coding elements assembled into mature mRNAs. Alternative pre-mRNA splicing provides an important source of transcriptome and proteome complexity through selectively joining different coding elements to form mRNAs, which encode proteins with similar or distinct functions. In mammals, previous studies have shown the role of alternative splicing in regulating the function of the immune system, especially in the regulation of T-cell activation and function. As lower vertebrates, teleost fish mainly rely on a large family of pattern recognition receptors (PRRs) to recognize pathogen-associated molecular patterns (PAMPs) from various invading pathogens. In this review, we summarize recent advances in our understanding of alternative splicing of piscine PRRs including peptidoglycan recognition proteins (PGRPs), nucleotide binding and oligomerization domain (NOD)-like receptors (NLRs), retinoic acid-inducible gene-I (RIG-I)-like receptors (RLRs) and their downstream signaling molecules, compared to splicing in mammals. We also discuss what is known and unknown about the function of splicing isoforms in the innate immune responses against pathogens infection in mammals and teleost fish. Finally, we highlight the consequences of alternative splicing in the innate immune system and give our view of important directions for future studies.
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Grass Carp Reovirus VP41 Targets Fish MITA To Abrogate the Interferon Response. J Virol 2017; 91:JVI.00390-17. [PMID: 28446676 DOI: 10.1128/jvi.00390-17] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 04/21/2017] [Indexed: 12/27/2022] Open
Abstract
Although fish possess an efficient interferon (IFN) system to defend against aquatic virus infection, grass carp reovirus (GCRV) still causes hemorrhagic disease in grass carp. To date, GCRV's strategy for evading the fish IFN response is still unknown. Here, we report that GCRV VP41 inhibits fish IFN production by suppressing the phosphorylation of mediator of IFN regulatory factor 3 (IRF3) activation (MITA). First, the activation of the IFN promoter (IFNpro) stimulated by mitochondrial antiviral signaling protein (MAVS) and MITA was decreased by the overexpression of VP41, whereas such activation induced by TANK-binding kinase 1 (TBK1) was not affected. Second, VP41 was colocalized in the cellular endoplasmic reticulum (ER) and associated with MITA. Furthermore, as a phosphorylation substrate of TBK1, VP41 significantly decreased the phosphorylation of MITA. Truncation assays indicated that the transmembrane (TM) region of VP41 was indispensable for the suppression of IFNpro activity. Finally, after infection with GCRV, VP41 blunted the transcription of host IFN and facilitated viral RNA synthesis. Taken together, our findings suggest that GCRV VP41 prevents the fish IFN response by attenuating the phosphorylation of MITA for viral evasion.IMPORTANCE MITA is thought to act as an adaptor protein to facilitate the phosphorylation of IRF3 by TBK1 upon viral infection, and it plays a critical role in innate antiviral responses. Here, we report that GCRV VP41 colocalizes with MITA at the ER and reduces MITA phosphorylation by acting as a decoy substrate of TBK1, thus inhibiting IFN production. These findings reveal GCRV's strategy for evading the host IFN response for the first time.
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Lazarte JMS, Kim YR, Lee JS, Im SP, Kim SW, Jung JW, Kim J, Lee JH, Jung TS. Immunostimulatory effect of DDX41 of olive flounder (Paralichthys olivaceus). FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1318836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- Jassy Mary S. Lazarte
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Young Rim Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jung Seok Lee
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Se Pyeong Im
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Si Won Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jae Wook Jung
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jaesung Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jeong-Ho Lee
- Inland Aquaculture Research Center, NIFS, Changwon, Korea
| | - Tae Sung Jung
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
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Lazarte JMS, Kim YR, Lee JS, Im SP, Kim SW, Jung JW, Kim J, Lee WJ, Jung TS. Enhancement of glycoprotein-based DNA vaccine for viral hemorrhagic septicemia virus (VHSV) via addition of the molecular adjuvant, DDX41. FISH & SHELLFISH IMMUNOLOGY 2017; 62:356-365. [PMID: 28126619 DOI: 10.1016/j.fsi.2017.01.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 01/19/2017] [Accepted: 01/20/2017] [Indexed: 06/06/2023]
Abstract
The use of molecular adjuvants to improve the immunogenicity of DNA vaccines has been thoroughly studied in recent years. Glycoprotein (G)-based DNA vaccines had been proven to be effective in combating infection against Rhabdovirus (especially infectious hematopoietic necrosis virus, IHNV) in salmonids. DDX41 is a helicase known to induce antiviral and inflammatory responses by inducing a type I IFN innate immune response. To gain more information regarding G-based DNA vaccines in olive flounder (Paralicthys olivaceus), we tried to develop a more efficient G-based DNA vaccine by adding a molecular adjuvant, DDX41. We designed a DNA vaccine in which the VHSV glycoprotein (G-protein) and DDX41 were driven by the EF-1α and CMV promoters, respectively. Olive flounders were intramuscularly immunized with 1 μg of plasmids encoding the G-based DNA vaccine alone (pEF-G), the molecular adjuvant alone (pEF-D), or the vaccine-adjuvant construct (pEF-GD). At two different time points, 15 and 30 days later, the fish were intraperitoneally infected with VHSV (100 μL; 1 × 106 TCID50/mL). Our assays revealed that the plasmid constructs showed up-regulated expression of IFN-1 and its associated genes at day 3 post-vaccination in both kidney and spleen samples. Specifically, pEF-GD showed statistically higher expression of immune response genes than pEF-G and pEF-D treated group (p < 0.05/p < 0.001). After VHSV challenge, the fish group treated with pEF-GD showed higher survival rate than the pEF-G treated group, though difference was not statistically significant in the 15 dpv challenged group however in the 30 dpv challenged group, the difference was statistically significant (p < 0.05). Together, these results clearly demonstrate that DDX41 is an effective adjuvant for the G-based DNA vaccine in olive flounder. Our novel findings could facilitate the development of more effective DNA vaccines for the aquaculture industry.
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Affiliation(s)
- Jassy Mary S Lazarte
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Young Rim Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jung Seok Lee
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Se Pyeong Im
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Si Won Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jae Wook Jung
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Jaesung Kim
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | | | - Tae Sung Jung
- Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea.
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Ding Y, Guan Y, Ao J, Chen X. Induction of type I interferons in response to bacterial stimuli in large yellow croaker Larimichthys crocea. FISH & SHELLFISH IMMUNOLOGY 2017; 62:349-355. [PMID: 28119146 DOI: 10.1016/j.fsi.2017.01.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/18/2017] [Accepted: 01/20/2017] [Indexed: 06/06/2023]
Abstract
In addition to the crucial roles in coordinating antiviral immune responses, type I interferons (IFNs) also play a role in the host immunity against bacterial pathogens. Our previous study identified two type I IFNs from large yellow croaker Larimichthys croaea(Lc), LcIFNd and LcIFNh, and showed their strong induction by poly(I:C) and antiviral activities. In the present study, both LcIFNd and LcIFNh were found to be rapidly induced in head kidney and spleen by mixed bacteria of Vibrio alginolyticus, Vibrio parahaemolyticus, and Aeromonas hydrophila. In the head kidney primary cells (HKCs), expression of these two LcIFN genes was increased by peptidoglycan (PGN) from Bacillus subtilis and lipopolysaccharide (LPS) from Escherichia coli. Consistently, Lc IFN-regulatory factor (LcIRF) 3 and LcIRF7, two key transcription factors of type I IFN expression, were also induced by these three bacteria, PGN, and LPS. These observations strongly suggested that large yellow croaker type I IFNs are involved in the immune response against bacterial infection. Luciferase assays showed that promoters of both LcIFNd and LcIFNh were activated by PGN, LPS, and genomic DNA of A. hydrophila, and A. hydrophila DNA was more potent than PGN and LPS in activating LcIFNd and LcIFNh promoters. Furthermore, the induction of LcIFNd promoter by these bacterial stimuli was further enhanced by the overexpression of LcIRF7 or LcIRF7 along with LcIRF3, while that of LcIFNh promoter was increased following the overexpression of LcIRF3 alone, suggesting that the induction of these two large yellow croaker IFNs by bacterial stimuli may be regulated via distinct manners. These results therefore revealed novel aspects of the functional regulation of teleost type I IFNs.
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Affiliation(s)
- Yang Ding
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen 361005, PR China
| | - Yanyun Guan
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen 361005, PR China
| | - Jingqun Ao
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen 361005, PR China
| | - Xinhua Chen
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen 361005, PR China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, PR China.
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16
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Ding Y, Ao J, Huang X, Chen X. Identification of Two Subgroups of Type I IFNs in Perciforme Fish Large Yellow Croaker Larimichthys crocea Provides Novel Insights into Function and Regulation of Fish Type I IFNs. Front Immunol 2016; 7:343. [PMID: 27656183 PMCID: PMC5013148 DOI: 10.3389/fimmu.2016.00343] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 08/24/2016] [Indexed: 12/11/2022] Open
Abstract
Like mammals, fish possess an interferon regulatory factor (IRF) 3/IRF7-dependent type I IFN responses, but the exact mechanism by which IRF3/IRF7 regulate the type I IFNs remains largely unknown. In this study, we identified two type I IFNs in the Perciforme fish large yellow croaker Larimichthys crocea, one of which belongs to the fish IFNd subgroup and the other is assigned to a novel subgroup of group I IFNs in fish, tentatively termed IFNh. The two IFN genes are constitutively expressed in all examined tissues, but with varied expression levels. Both IFN genes can be rapidly induced in head kidney and spleen tissues by polyinosinic–polycytidylic acid. The recombinant IFNh was shown to be more potent to trigger a rapid induction of the antiviral genes MxA and protein kinase R than the IFNd, suggesting that they may play distinct roles in regulating early antiviral immunity. Strikingly, IFNd, but not IFNh, could induce the gene expression of itself and IFNh through a positive feedback loop mediated by the IFNd-dependent activation of IRF3 and IRF7. Furthermore, our data demonstrate that the induction of IFNd can be enhanced by the dimeric formation of IRF3 and IRF7, while the IFNh expression mainly involves IRF3. Taken together, our findings demonstrate that the IFN responses are diverse in fish and are likely to be regulated by distinct mechanisms.
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Affiliation(s)
- Yang Ding
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Jingqun Ao
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration , Xiamen , China
| | - Xiaohong Huang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Xinhua Chen
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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17
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Zhan FB, Liu H, Lai RF, Jakovlić I, Wang WB, Wang WM. Molecular identification and functional characterisation of the interferon regulatory factor 1 in the blunt snout bream (Megalobrama amblycephala). FISH & SHELLFISH IMMUNOLOGY 2016; 54:456-465. [PMID: 27150048 DOI: 10.1016/j.fsi.2016.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/29/2016] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
Interferon regulatory factors (IRFs) play a key role in mediating the host response against pathogen infection and other important biological processes. This is the first report of an IRF family member in blunt snout bream Megalobrama amblycephala. The complete cDNA of M. amblycephala (Ma) IRF1 gene has 1422 nucleotides (nt.), with an open reading frame of 858 nt, encoding a polypeptide of 285 amino acids. The putative MaIRF1 polypeptide shared significant structural homology with known IRF1 homologs: a conserved IRF domain was found at the N-terminal and an IRF association domain 2 at the C-terminal. Phylogenetic analysis showed that MaIRF1 amino acid sequence clustered with other teleost IRF1s, with a grass carp ortholog exhibiting the highest similarity. MaIRF1 mRNA expression patterns were studied using quantitative real-time PCR in healthy fish tissues and after a challenge with Aeromonas hydrophila bacterium. It was constitutively expressed in all examined tissues: the highest in blood, the lowest in muscle. The expression after A. hydrophila challenge was up-regulated in liver, spleen and kidney, but down-regulated in intestine and gills. At the protein level, similar expression patterns were observed in liver and gills. Patterns differed in intestine (up-regulation), spleen (down-regulation) and kidney (expression mostly unchanged). This study indicates that MaIRF1 gene plays an important role in the blunt snout bream immune system, hence providing an important base for further studies.
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Affiliation(s)
- Fan-Bin Zhan
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Han Liu
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Rui-Fang Lai
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Ivan Jakovlić
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Wen-Bin Wang
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde 41500, China
| | - Wei-Min Wang
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
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18
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pol-miR-731, a teleost miRNA upregulated by megalocytivirus, negatively regulates virus-induced type I interferon response, apoptosis, and cell cycle arrest. Sci Rep 2016; 6:28354. [PMID: 27311682 PMCID: PMC4911600 DOI: 10.1038/srep28354] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 06/02/2016] [Indexed: 02/07/2023] Open
Abstract
Megalocytivirus is a DNA virus that is highly infectious in a wide variety of marine and freshwater fish, including Japanese flounder (Paralichthys olivaceus), a flatfish that is farmed worldwide. However, the infection mechanism of megalocytivirus remains largely unknown. In this study, we investigated the function of a flounder microRNA, pol-miR-731, in virus-host interaction. We found that pol-miR-731 was induced in expression by megalocytivirus and promoted viral replication at the early infection stage. In vivo and in vitro studies revealed that pol-miR-731 (i) specifically suppresses the expression of interferon regulatory factor 7 (IRF7) and cellular tumor antigen p53 in a manner that depended on the integrity of the pol-miR-731 complementary sequences in the 3′ untranslated regions of IRF7 and p53, (ii) disrupts megalocytivirus-induced Type I interferon response through IRF7, (iii) inhibits megalocytivirus-induced splenocyte apoptosis and cell cycle arrest through p53. Furthermore, overexpression of IRF7 and p53 abolished both the inhibitory effects of pol-miR-731 on these biological processes and its stimulatory effect on viral replication. These results disclosed a novel evasion mechanism of megalocytivirus mediated by a host miRNA. This study also provides the first evidence that a virus-induced host miRNA can facilitate viral infection by simultaneously suppressing several antiviral pathways.
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Zhu YY, Xing WX, Shan SJ, Zhang SQ, Li YQ, Li T, An L, Yang GW. Characterization and immune response expression of the Rig-I-like receptor mda5 in common carp Cyprinus carpio. JOURNAL OF FISH BIOLOGY 2016; 88:2188-202. [PMID: 27108774 DOI: 10.1111/jfb.12981] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 03/03/2016] [Indexed: 05/05/2023]
Abstract
In this study, the full-length complementary (c)DNA of common carp Cyprinus carpio melanoma differentiation-associated gene 5 (mda5) was cloned. The complete open reading frame of C. carpio mda5 contained 2982 bp and encodes 993 amino acids. The deduced amino acids contained six functional domains: two caspase activation and recruitment domains (CARD), a conserved restriction domain of bacterial type III restriction enzyme (ResIII), a DExD/H box-containing domain (DEXDc), a helicase super family C-terminal domain (HELICc) and a C-terminal regulatory domain (RD). The mda5 gene was expressed in all tested tissues, with high levels in the gills and spleen, while lower expressed in gonad and blood. The copy numbers of mda5 were increased in the liver, spleen, head kidney and the mucosal-associated immune tissues such as the foregut, hindgut, gills and skin after stimulation with polyinosinic polycytidylic [poly(I:C)] and Aeromonas hydrophila. The myxovirus resistance gene (mx) messenger (m)RNA levels in the spleen, head kidney, foregut and gills were significantly up-regulated after poly(I:C) injection. When injected with poly(I:C), mda5 and mx transcripts were also significantly induced in vitro. These results implied that mda5 might be involved in both antiviral and antibacterial innate immune processes in C. carpio. © 2016 The Authors. Journal of Fish Biology © 2016 The Fisheries Society of the British Isles.
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Affiliation(s)
- Y Y Zhu
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - W X Xing
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - S J Shan
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - S Q Zhang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Y Q Li
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - T Li
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - L An
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - G W Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Science, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
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20
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Zou J, Secombes CJ. The Function of Fish Cytokines. BIOLOGY 2016; 5:biology5020023. [PMID: 27231948 PMCID: PMC4929537 DOI: 10.3390/biology5020023] [Citation(s) in RCA: 269] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/28/2016] [Accepted: 05/17/2016] [Indexed: 12/14/2022]
Abstract
What is known about the biological activity of fish cytokines is reviewed. Most of the functional studies performed to date have been in teleost fish, and have focused on the induced effects of cytokine recombinant proteins, or have used loss- and gain-of-function experiments in zebrafish. Such studies begin to tell us about the role of these molecules in the regulation of fish immune responses and whether they are similar or divergent to the well-characterised functions of mammalian cytokines. This knowledge will aid our ability to determine and modulate the pathways leading to protective immunity, to improve fish health in aquaculture.
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Affiliation(s)
- Jun Zou
- Scottish Fish Immunology Research Centre, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
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21
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Kuo HP, Chung CL, Hung YF, Lai YS, Chiou PP, Lu MW, Kong ZL. Comparison of the responses of different recombinant fish type I interferons against betanodavirus infection in grouper. FISH & SHELLFISH IMMUNOLOGY 2016; 49:143-153. [PMID: 26691305 DOI: 10.1016/j.fsi.2015.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 11/30/2015] [Accepted: 12/01/2015] [Indexed: 06/05/2023]
Abstract
The nervous necrosis virus (NNV) is an aquatic virus that can infect more than 30 species including the grouper, which is a valuable fish species in Taiwan. NNV causes up to 90-100% mortality in the aquaculture industry. Interferons (IFNs) are a family of cytokines that stimulate the expression of numerous proteins to protect the host against viruses and possess very unique specific characteristics in fish. The cross-reactivity of heterologous IFNs on grouper cells and larvae has not been well-studied to date. To evaluate and compare the anti-NNV effect of different fish IFNs in grouper, we successfully synthesized, subcloned, expressed and purified several fish type I IFNs in the present study: grouper (gIFN), salmon (sIFN), seabass (sbIFN) and tilapia (tpIFN). The gIFN and sIFN proteins up-regulated myxovirus resistance protein (Mx) gene expression in grouper kidney (GK) cells, but similar effects were not observed for sbIFN and tpIFN. Following co- and pre-treatment with the 4 types of IFNs with NNV infection in GK cells, sIFN exhibited the strongest antiviral ability to suppress NNV gene replication (especially at 24 h) and significantly reduced the cytopathic effect (CPE) at 72 h, followed by gIFN. Unsurprisingly, sbIFN and tpIFN had no significant effect on CPE but slightly suppressed NNV gene replication. The cytotoxicity of these four fish IFNs on GK cells was also examined for the first time. In the in vivo test, we confirmed that gIFN and sIFN had a significant protective effect against NNV when administered by intraperitoneal (IP) injection and the oral route in Malabar grouper (Epinephelus malabaricus) larvae. This study compared the protective effects of IFNs from various fish species against NNV and demonstrated crosstalk between sIFN and grouper cells for the first time. These results provide information concerning the efficacy of fish IFNs for possible therapeutic applications.
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Affiliation(s)
- Hsiang-Ping Kuo
- Department of Food Science, National Taiwan Ocean University, Keelung 202, Taiwan, ROC; COO of Sea Party International Co., Ltd., Taipei 104, Taiwan, ROC
| | - Chia-Ling Chung
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan, ROC
| | - Yu-Fang Hung
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan, ROC
| | - Yu-Shen Lai
- Institute of Biotechnology, National Ilan University, Ilan 260, Taiwan, ROC
| | - Pinwen P Chiou
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan, ROC
| | - Ming-Wei Lu
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan, ROC; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202, Taiwan, ROC.
| | - Zwe-Ling Kong
- Department of Food Science, National Taiwan Ocean University, Keelung 202, Taiwan, ROC.
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22
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Maekawa S, Chiang YA, Hikima JI, Sakai M, Lo CF, Wang HC, Aoki T. Expression and biological activity of two types of interferon genes in medaka (Oryzias latipes). FISH & SHELLFISH IMMUNOLOGY 2016; 48:20-29. [PMID: 26655956 DOI: 10.1016/j.fsi.2015.11.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 11/20/2015] [Accepted: 11/25/2015] [Indexed: 06/05/2023]
Abstract
Type I interferon (IFN) is one of most important cytokines for antiviral responses in fish innate immunity, after the induction pathway following pattern recognition. In this study, 2 types of type I IFN mRNA from a medaka (Japanese rice fish; Oryzias latipes) were identified and classified (phylogenetic analysis) into subgroup-a and -d by (designated olIFNa and olIFNd, respectively). Both olIFNa and olIFNd (encoding 197 and 187 amino acid residues, respectively) contained 2 cysteines. Gene expression pattern of olIFNa, olIFNd and IFN-stimulated genes (ISGs) was assessed (quantitative real-time reverse transcriptase PCR, qRT-PCR) in various organs (i.e., whole kidney, liver and spleen) of medaka stimulated by polyI:C or infected with nervous necrosis virus (NNV). Expression of olIFNa, olIFNd and ISGs, especially the ISG15 gene, were significantly upregulated after NNV-infection. Furthermore, olIFNa, olIFNd and ISGs mRNAs were sufficiently induced in DIT cells (i.e., medaka hepatoma cell line) transfected with polyI:C or infected with NNV. In addition, in vitro biological activities of recombinant olIFNa and olIFNd (rolIFNa and rolIFNd) produced by mammalian cell line HEK293T were also characterized. Expression of GIG1a and ISG15 genes in kidney cells of adult medaka were induced by rolIFNa or rolIFNd. The olIFNs-overexpressing DIT cells had reduced viral titers following NNV infection. Therefore, we inferred that 2 type I IFNs were involved in innate immunity (antiviral response) in medaka fish.
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Affiliation(s)
- Shun Maekawa
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Yi-An Chiang
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Jun-ichi Hikima
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
| | - Masahiro Sakai
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
| | - Chu-Fang Lo
- Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Han-Ching Wang
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan.
| | - Takashi Aoki
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan.
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Yuan S, Zheng T, Li P, Yang R, Ruan J, Huang S, Wu Z, Xu A. Characterization of Amphioxus IFN Regulatory Factor Family Reveals an Archaic Signaling Framework for Innate Immune Response. THE JOURNAL OF IMMUNOLOGY 2015; 195:5657-5666. [DOI: 10.4049/jimmunol.1501927] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Abstract
The IFN regulatory factor (IRF) family encodes transcription factors that play important roles in immune defense, stress response, reproduction, development, and carcinogenesis. Although the origin of the IRF family has been dated back to multicellular organisms, invertebrate IRFs differ from vertebrate IRFs in genomic structure and gene synteny, and little is known about their functions. Through comparison of multiple amphioxus genomes, in this study we suggested that amphioxus contains nine IRF members, whose orthologs are supposed to be shared among three amphioxus species. As the orthologs to the vertebrate IRF1 and IRF4 subgroups, Branchiostoma belcheri tsingtauense (bbt)IRF1 and bbtIRF8 bind the IFN-stimulated response element (ISRE) and were upregulated when amphioxus intestinal cells were stimulated with poly(I:C). As amphioxus-specific IRFs, both bbtIRF3 and bbtIRF7 bind ISRE. When activated, they can be phosphorylated by bbtTBK1 and then translocate into nucleus for target gene transcription. As transcriptional repressors, bbtIRF2 and bbtIRF4 can inhibit the transcriptional activities of bbtIRF1, 3, 7, and 8 by competing for the binding of ISRE. Interestingly, amphioxus IRF2, IRF8, and Rel were identified as target genes of bbtIRF1, bbtIRF7, and bbtIRF3, respectively, suggesting a dynamic feedback regulation among amphioxus IRF and NF-κB. Collectively, to our knowledge we present for the first time an archaic IRF signaling framework in a basal chordate, shedding new insights into the origin and evolution of vertebrate IFN-based antiviral networks.
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Affiliation(s)
- Shaochun Yuan
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Tingting Zheng
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Peiyi Li
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Rirong Yang
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Jie Ruan
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Shengfeng Huang
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Zhenxin Wu
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
| | - Anlong Xu
- *State Key Laboratory of Biocontrol, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People’s Republic of China; and
- †Beijing University of Chinese Medicine, Beijing 100029, People’s Republic of China
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24
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Thanasaksiri K, Hirono I, Kondo H. Temperature-dependent regulation of gene expression in poly (I:C)-treated Japanese flounder, Paralichthys olivaceus. FISH & SHELLFISH IMMUNOLOGY 2015; 45:835-840. [PMID: 26052011 DOI: 10.1016/j.fsi.2015.05.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/21/2015] [Accepted: 05/28/2015] [Indexed: 06/04/2023]
Abstract
Gene expression profiling of poly (I:C)-treated Japanese flounder, Paralichthys olivaceus, under different temperatures was investigated using microarray analysis. The response was analyzed in spleen tissue at 3 and 24 h post injection (hpi) at 15 °C and 25 °C. A large number of genes in fish treated with poly (I:C) at 25 °C were expressed at 3 hpi, whereas the expression profiles at 24 hpi appeared to be similar to those of the controls. Cluster analysis of the different expression profiles showed three distinct groups of up-regulated genes in fish reared at 15 °C. These were early (3 hpi), early-to-late (3 and 24 hpi), and late (24 hpi) up-regulated genes. These genes included type I IFN-related genes and inflammatory genes. Among the up-regulated genes, most of the type I IFN-related genes played early-to-late- and late-responding genes at 15 °C but early-responding genes at 25 °C. Thus, several up-regulated genes in these groups from the microarray result were further verified by qPCR. These results indicate that the type I IFN gene expressions of P. olivaceus treated with poly (I:C) can be regulated in a temperature-dependent manner.
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Affiliation(s)
- Kittipong Thanasaksiri
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo 108-8477, Japan
| | - Ikuo Hirono
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo 108-8477, Japan
| | - Hidehiro Kondo
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo 108-8477, Japan.
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25
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Sensors of Infection: Viral Nucleic Acid PRRs in Fish. BIOLOGY 2015; 4:460-93. [PMID: 26184332 PMCID: PMC4588145 DOI: 10.3390/biology4030460] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 06/19/2015] [Accepted: 06/19/2015] [Indexed: 12/25/2022]
Abstract
Viruses produce nucleic acids during their replication, either during genomic replication or transcription. These nucleic acids are present in the cytoplasm or endosome of an infected cell, or in the extracellular space to be sensed by neighboring cells during lytic infections. Cells have mechanisms of sensing virus-generated nucleic acids; these nucleic acids act as flags to the cell, indicating an infection requiring defense mechanisms. The viral nucleic acids are called pathogen-associated molecular patterns (PAMPs) and the sensors that bind them are called pattern recognition receptors (PRRs). This review article focuses on the most recent findings regarding nucleic acids PRRs in fish, including: Toll-like receptors (TLRs), RIG-I-like receptors (RLRs), cytoplasmic DNA sensors (CDSs) and class A scavenger receptors (SR-As). It also discusses what is currently known of the downstream signaling molecules for each PRR family and the resulting antiviral response, either type I interferons (IFNs) or pro-inflammatory cytokine production. The review highlights what is known but also defines what still requires elucidation in this economically important animal. Understanding innate immune systems to virus infections will aid in the development of better antiviral therapies and vaccines for the future.
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26
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Valero Y, Morcillo P, Meseguer J, Buonocore F, Esteban MA, Chaves-Pozo E, Cuesta A. Characterization of the IFN pathway in the teleost fish gonad against vertically transmitted viral nervous necrosis virus. J Gen Virol 2015; 96:2176-2187. [PMID: 25918238 DOI: 10.1099/vir.0.000164] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
One of the most powerful innate immune responses against viruses is mediated by type I IFN. In teleost fish, it is known that virus infection triggers the expression of ifn and many IFN-stimulated genes, but the viral RNA sensors and mediators leading to IFN production are scarcely known. Thus, we have searched for the presence of these genes in gilt-head sea bream (Sparus aurata) and European sea bass (Dicentrarchus labrax), and evaluated their expression after infection with viral nervous necrosis virus (VNNV) in the brain, the main viral target tissue, and the gonad, used to transmit the virus vertically. In sea bream, a fish species resistant to the VNNV strain used, we found an upregulation of the genes encoding MDA5 (melanoma differentiation-associated gene 5), TBK1 (TANK-binding kinase 1), IRF3 (IFN regulatory factor 3), IFN, Mx [myxovirus (influenza) resistance protein] and PKR (dsRNA-dependent protein kinase receptor) proteins in the brain, which were unaltered in the gonad and could favour the dissemination by gonad fluids or gametes. Strikingly, in European sea bass, a very susceptible species, we also identified, transcripts coding for LGP2 (Laboratory of Genetics and Physiology 2), MAVS (mitochondrial antiviral signalling), TRAF3 (TNF receptor-associated factor 3), TANK (TRAF family member-associated NFκB activator) and IRF7 (IFN regulatory factor 7), and found that all the genes analysed were upregulated in the gonad, but only mda5, lgp2, irf3, mx and pkr were upregulated in the brain. These findings supported the notion that the European sea bass brain innate immune response is unable to clear the virus and pointed to the importance of gonad immunity to control the dissemination of VNNV to the progeny--an aspect that is worth investigating in aquatic animals.
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Affiliation(s)
- Yulema Valero
- Centro Oceanográfico de Murcia, Instituto Español de Oceanografía (IEO), Carretera de la Azohía s/n, Puerto de Mazarrón, 30860 Murcia, Spain
| | - Patricia Morcillo
- Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100 Murcia, Spain
| | - José Meseguer
- Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100 Murcia, Spain
| | - Francesco Buonocore
- Dipartimento per l'Innovazione nei Sistemi Biologici Agroalimentari e Forestali, Università della Tuscia, Italy
| | - María A Esteban
- Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100 Murcia, Spain
| | - Elena Chaves-Pozo
- Centro Oceanográfico de Murcia, Instituto Español de Oceanografía (IEO), Carretera de la Azohía s/n, Puerto de Mazarrón, 30860 Murcia, Spain
| | - Alberto Cuesta
- Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100 Murcia, Spain
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27
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Huang Y, Huang X, Cai J, OuYang Z, Wei S, Wei J, Qin Q. Identification of orange-spotted grouper (Epinephelus coioides) interferon regulatory factor 3 involved in antiviral immune response against fish RNA virus. FISH & SHELLFISH IMMUNOLOGY 2015; 42:345-52. [PMID: 25463297 DOI: 10.1016/j.fsi.2014.11.025] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 11/13/2014] [Accepted: 11/17/2014] [Indexed: 05/22/2023]
Abstract
Interferon regulatory factor 3 (IRF3) is an important transcription factor which regulates the expression of interferon (IFN) and IFN-stimulated genes (ISGs) following virus recognition. In this study, a novel IRF3 gene was cloned from grouper Epinephelus coioides (EcIRF3) and its effects against Singapore grouper iridovirus (SGIV) and red spotted grouper nervous necrosis virus (RGNNV) was investigated. The full-length of EcIRF3 cDNA was composed of 2513 bp and encoded a polypeptide of 458 amino acids which shared 82% identity with European seabass (Dicentrarchus labrax). EcIRF3 contained three conserved domains including a DNA-binding domain (DBD), an IRF associated domain (IAD) and a serine-rich domain. Expression profile analysis revealed that EcIRF3 was abundant in head kidney, kidney, spleen and gill. Upon different stimuli in vitro, the transcript of EcIRF3 was significantly up-regulated after RGNNV infection or treatment with polyinosin-polycytidylic acid (poly I:C). During SGIV infection, the increase of the EcIRF3 transcription was only detected at the late stage, suggesting that EcIRF3 was differently regulated by different stimuli. Immune fluorescence assay indicated that the fluorescence signal of EcIRF3 was increased significantly after infection with RGNNV or treatment with poly I:C, but moderately at the late stage of SGIV infection. Reporter gene assay showed that EcIRF3 activated zebrafish type I IFN and type III IFN promoter in vitro. The viral gene transcription and virus production of RGNNV were significantly decreased in EcIRF3 overexpressing cells. However, the ectopic expression of EcIRF3 did not affect the gene transcription and virus production of SGIV. Moreover, the mRNA expression levels of type I IFN and IFN-inducible genes (MxI, ISG15 and ISG56) were increased in RGNNV infected EcIRF3 overexpressing cells compared to empty vector transfected cells. Together, our results demonstrated that IFN immune response mediated by grouper IRF3 was exerted crucial roles for fish RNA virus, but not for DNA virus replication.
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Affiliation(s)
- Youhua Huang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Xiaohong Huang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Jia Cai
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Zhengliang OuYang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Shina Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Jingguang Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Qiwei Qin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China.
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28
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Feng H, Zhang YB, Zhang QM, Li Z, Zhang QY, Gui JF. Zebrafish IRF1 Regulates IFN Antiviral Response through Binding to IFNϕ1 and IFNϕ3 Promoters Downstream of MyD88 Signaling. THE JOURNAL OF IMMUNOLOGY 2014; 194:1225-38. [DOI: 10.4049/jimmunol.1402415] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Lauksund S, Greiner-Tollersrud L, Chang CJ, Robertsen B. Infectious pancreatic necrosis virus proteins VP2, VP3, VP4 and VP5 antagonize IFNa1 promoter activation while VP1 induces IFNa1. Virus Res 2014; 196:113-21. [PMID: 25445351 PMCID: PMC7114410 DOI: 10.1016/j.virusres.2014.11.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/11/2014] [Accepted: 11/13/2014] [Indexed: 12/25/2022]
Abstract
IPNV genes preVP2, VP3, VP4 and VP5 inhibited activation of the IFNa1 promoter. The viral protease VP4 was the most potent inhibitor of IFN induction. IFN antagonism by VP4 is independent of its protease activity. The RNA polymerase VP1 activated the IFNa1 promoter.
Infectious pancreatic necrosis virus (IPNV) is one of the major viral pathogens causing disease in farmed Atlantic salmon worldwide. In the present work we show that several of the IPN proteins have powerful antagonistic properties against type I IFN induction in Atlantic salmon. Each of the five IPNV genes cloned into an expression vector were tested for the ability to influence activation of the Atlantic salmon IFNa1 promoter by the interferon promoter inducing protein one (IPS-1) or interferon regulatory factors (IRF). This showed that preVP2, VP3 and VP5 inhibited activation of both promoters, while VP4 only antagonized activation of the IFNa1 promoter. The viral protease VP4 was the most potent inhibitor of IFN induction, apparently targeting the IRF1 and IRF3 branch of the signaling cascade. VP4 antagonism is independent of its protease activity since the catalytically dead mutant VP4K674A inhibited activation of the IFNa1 promoter to a similar extent as wild type VP4. In contrast to the other IPNV proteins, the RNA-dependent RNA polymerase VP1 activated the IFNa1 promoter. The ability to activate the IFN response was disrupted in the mutant VP1S163A, which has lost the ability to produce dsRNA. VP1 also exhibited synergistic effects with IRF1 and IRF3 in inducing an IFNa1-dependent antiviral state in cells. Taken together these results suggest that IPNV has developed multiple IFN antagonistic properties to prevent IFN-induction by VP1 and its dsRNA genome.
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Affiliation(s)
- Silje Lauksund
- Norwegian College of Fishery Science, University of Tromsø, 9037 Tromsø, Norway
| | | | - Chia-Jung Chang
- Norwegian College of Fishery Science, University of Tromsø, 9037 Tromsø, Norway
| | - Børre Robertsen
- Norwegian College of Fishery Science, University of Tromsø, 9037 Tromsø, Norway.
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30
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Chen YM, Kuo CE, Chen GR, Kao YT, Zou J, Secombes CJ, Chen TY. Functional analysis of an orange-spotted grouper (Epinephelus coioides) interferon gene and characterisation of its expression in response to nodavirus infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 46:117-28. [PMID: 24731841 DOI: 10.1016/j.dci.2014.04.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/03/2014] [Accepted: 04/06/2014] [Indexed: 05/22/2023]
Abstract
We cloned and sequenced 2C I-IFN, a two-cysteine containing type I interferon (I-IFN) gene, in orange-spotted grouper (Epinephelus coioides). The cDNA has 769 base pairs, the protein has 172 amino acids, and the predicted signal peptide has 18 amino acids with two cysteines. This gene is similar to I-FNs from sea bass and other teleosts. 2C I-IFN has 5 exons and 4 introns, also similar to other teleost I-IFNs. Immunohistochemical (IHC) analysis indicated that expression is predominantly membrane-localized in healthy grouper, but has a zonal distribution in nodavirus-infected grouper. Grouper infected with nodavirus had elevated levels of 2C I-IFN at 72 h and Mx at days 6-7. Recombinant 2C I-IFN activated grouper Mx, leading to upregulated antiviral activity. The grouper Mx promoter was highly induced after treatment with recombinant 2C I-IFN. The present results suggest that expression of grouper 2C I-IFN may participate in the immunologic barrier function against nodavirus.
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Affiliation(s)
- Young-Mao Chen
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Cham-En Kuo
- Department of Nursing, Tzu Hui Institute of Technology, Pingtung 92641, Taiwan
| | - Guan-Ru Chen
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan
| | - Yu-Ting Kao
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Jun Zou
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Chris J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Tzong-Yueh Chen
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan 70101, Taiwan; University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Ocean Environment and Technology, National Cheng Kung University, Tainan 70101, Taiwan.
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31
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Chen YM, Wang TY, Chen TY. Immunity to betanodavirus infections of marine fish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 43:174-83. [PMID: 23916690 DOI: 10.1016/j.dci.2013.07.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 07/26/2013] [Accepted: 07/26/2013] [Indexed: 05/07/2023]
Abstract
Betanodaviruses cause viral nervous necrosis in numerous fish species, but some species are resistant to infection by these viruses. It is essential to fully characterize the immune responses that underlie this protective response. Complete characterization of the immune responses against nodaviruses may allow the development of methods that stimulate fish immunity and of an effective betanodavirus vaccine. Such strategies could include stimulation of specific immune system responses or blockage of factors that decrease the immune response. The innate immune system clearly provides a front-line defense, and this includes the production of interferons and other cytokines. Interferons that are released inside infected cells and that suppress viral replication may be the most ancient form of innate immunity. This review focuses on the immune responses of fish to betanodavirus infection.
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Affiliation(s)
- Young-Mao Chen
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Ting-Yu Wang
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan
| | - Tzong-Yueh Chen
- Laboratory of Molecular Genetics, Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan 70101, Taiwan; University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Ocean Environment and Technology, National Cheng Kung University, Tainan 70101, Taiwan.
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32
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Aoki T, Hikima JI, Hwang SD, Jung TS. Innate immunity of finfish: primordial conservation and function of viral RNA sensors in teleosts. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1689-1702. [PMID: 23462146 DOI: 10.1016/j.fsi.2013.02.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 01/25/2013] [Accepted: 02/08/2013] [Indexed: 06/01/2023]
Abstract
During the past decade, huge progress has been made in research into teleost PAMPs (pathogen-associated molecule patterns) recognition receptors (PRRs). Numerous fish PRR genes have been identified, and the primordial functions of PRRs involved in the innate immune response to viral infection (especially those responsible for sensing viral RNA) have been increasingly clarified in teleosts. Particular progress has been made in our understanding of Toll-like receptors (TLRs) and retinoic acid inducible gene I (RIG-I)-like receptors (RLRs). However, there are important evolutionary differences between teleosts and mammals; for instance, seven TLR repertoires (TLR5S, -14, -19, -20, -21, -22 and -23) are present in teleosts but not in mammals, indicating that some TLRs likely possess different functions. Thus, comparison of PRRs in teleosts and mammals may help us understand the immune responses triggered by host-pathogen interactions in teleosts. In this article, the evolutionary conservations and divergences in the PRR mechanisms of teleosts and mammals are examined, with a focus on their molecular features and the recognition of viral RNA by fish TLRs and RLRs. In addition, the mechanism of type I interferon gene expression in teleosts, which is enhanced after the recognition of viral RNA by fish TLRs and RLRs, is also introduced.
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Affiliation(s)
- Takashi Aoki
- Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, 513, Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan; Aquatic Biotechnology Center, College of Veterinary Medicine, Gyeongsang National University, 900, Gajwa-dong, Jinju, Gyeongnam 660-710, South Korea.
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Chen L, Li Q, Su J, Yang C, Li Y, Rao Y. Trunk kidney of grass carp (Ctenopharyngodon idella) mediates immune responses against GCRV and viral/bacterial PAMPs in vivo and in vitro. FISH & SHELLFISH IMMUNOLOGY 2013; 34:909-919. [PMID: 23333439 DOI: 10.1016/j.fsi.2013.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 01/02/2013] [Accepted: 01/04/2013] [Indexed: 06/01/2023]
Abstract
Trunk kidney is a vital organ for excretion in teleosts. There have been sporadic reports of processing pathogens for the immune function in trunk kidney. However, molecular processes of pathogen recognition receptors (PRRs) responding to virus and viral/bacterial pathogen-associated molecular patterns (PAMPs) are poorly elucidated in trunk kidney. In the present study, we investigated transcriptional profiles of twelve representative immune-related genes (TLRs (TLR3, TLR7 and TLR22); RLRs (RIG-I, MDA5 and LGP2); NLRs (NOD1 and NOD2); adapter molecules (MyD88 and IPS-1); effector molecule type I interferon (IFN-I) and immunoglobulin M (IgM)) in trunk kidney tissue of grass carp (Ctenopharyngodon idella) (designated as Ci) injection of grass carp reovirus (GCRV) utilizing quantitative real-time RT-PCR (qRT-PCR). Furthermore, mRNA expression patterns of these genes (IgM excepted) were examined post GCRV infection and polyinosine-polycytidylic acid (poly(I:C)), lipopolysaccharide (LPS) or peptidoglycan (PGN) stimulation in primary trunk kidney cells of grass carp. The relative values of CiTLR3, CiTLR22 and CiMyD88 were increased post GCRV challenge and viral/bacterial PAMPs stimulation. The mRNA transcriptions of CiTLR7 were obviously activated with GCRV challenge. Remarkably, the mRNA expressions of CiRIG-I, CiMDA5, CiLGP2 and CiIPS-1 were largely up-regulated with GCRV challenge and viral/bacterial PAMPs stimulation. Interestingly, the expression tendencies of CiNOD1 and CiNOD2 were differential not only in GCRV challenge and poly(I:C) stimulation, but also in LPS and PGN stimulation. It was demonstrated that CiIFN-I induced powerful anti-viral and anti-bacterial effects in trunk kidney. In addition, the expression of CiIgM was induced at 72 h post GCRV injection in vivo. Collectively, these results suggest that trunk kidney of grass carp serves as an important immune organ, and plays crucial roles in triggering anti-viral and anti-bacterial immune responses both in vivo and in vitro.
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Affiliation(s)
- Lijun Chen
- Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, No. 22, Xinong Rd., Yangling, Shaanxi Province 712100, China
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LGP2 expression is enhanced by interferon regulatory factor 3 in olive flounder, Paralichthys olivaceus. PLoS One 2012; 7:e51522. [PMID: 23251565 PMCID: PMC3519686 DOI: 10.1371/journal.pone.0051522] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 11/02/2012] [Indexed: 12/18/2022] Open
Abstract
In innate immunity, LGP2 (laboratory of genetics and physiology 2) plays a very important role in the production of type I interferon (IFN) through recognition of cytosolic viral RNA. Although viral infection or stimulation with double-strand RNA dramatically induces expression of the LGP2 gene, the underlying transcriptional mechanism has never been studied. Here, we cloned and characterized the 5′-upstream region (−1,337 bp) of the LGP2 gene in olive flounder (Paralichthys olivaceus). Numerous canonical motifs for IFN-regulatory factors (IRFs) were found in this region, and reporter assays identified a poly I:C-responsive promoter region (−506 to −398) that regulated LGP2 transcription. Transcriptional activity of the LGP2 promoter was strongly enhanced by IRF3, which bound to IRF3 motif #3 (−480). The LGP2 promoter was also responsive to viral infection in vitro. These results suggest that LGP2 transcriptional control is crucially involved to regulated by IRF3 function after viral infection or stimulation with poly I:C.
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Kono T, Takayama H, Nagamine R, Korenaga H, Sakai M. Establishment of a multiplex RT-PCR assay for the rapid detection of fish cytokines. Vet Immunol Immunopathol 2012; 151:90-101. [PMID: 23237907 DOI: 10.1016/j.vetimm.2012.10.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 10/19/2012] [Accepted: 10/30/2012] [Indexed: 02/07/2023]
Abstract
To monitor the expression of cytokine genes in Japanese pufferfish, a novel platform for quantitative multiplexed analysis was developed. This custom-designed multiplex RT-PCR assay was used to analyze the expression profiles of 19 cytokine genes, including pro-inflammatory (IL-1β, IL-6, IL-17A/F3, IL-18, TNF-α, TNF-N), anti-inflammatory (IL-4/13A, IL-4/13B, IL-10), T-cell proliferation/differentiation (IL-2, IL-15, IL-21, TGF-β1), B-cell activation/differentiation (IL-7, IL-6, IL-4/13A, IL-4/13B), NK cell stimulation (IL-12p35 and IL-12p40), induction of anti-viral activity (I-IFN-1 and IFN-γ), and monocyte/macrophage progenitor cell proliferation (M-CSF1b) cytokines in head kidney cells under immune stimulatory conditions. The expression profiles were dissimilar in the unstimulated control and immune-stimulated cells. Moreover, increased expression profile was observed due to different stimulations for IL-1β, IL-6, IL-10, IL-12p35, IL-12p40, IL-21, TNF-α, TNF-N, I-IFN-1 and IFN-γ genes. These results suggest that cytokine genes could be used as biomarkers to know the immune status of fish. The constructed multiplex RT-PCR assay will enhance understanding on immune regulation by cytokines in fish.
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Affiliation(s)
- Tomoya Kono
- Interdisciplinary Research Organization, University of Miyazaki, 1-1 Gakuen kibanadai-nishi, Miyazaki 889-2192, Japan.
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Biacchesi S, Mérour E, Lamoureux A, Bernard J, Brémont M. Both STING and MAVS fish orthologs contribute to the induction of interferon mediated by RIG-I. PLoS One 2012; 7:e47737. [PMID: 23091644 PMCID: PMC3473018 DOI: 10.1371/journal.pone.0047737] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 09/17/2012] [Indexed: 12/28/2022] Open
Abstract
Viral infections are detected in most cases by the host innate immune system through pattern-recognition receptors (PRR), the sensors for pathogen-associated molecular patterns (PAMPs), which induce the production of cytokines, such as type I interferons (IFN). Recent identification in mammalian and teleost fish of cytoplasmic viral RNA sensors, RIG-I-like receptors (RLRs), and their mitochondrial adaptor: the mitochondrial antiviral signaling (MAVS) protein, also called IPS-1, highlight their important role in the induction of IFN at the early stage of a virus infection. More recently, an endoplasmic reticulum (ER) adaptor: the stimulator of interferon genes (STING) protein, also called MITA, ERIS and MPYS, has been shown to play a pivotal role in response to both non-self-cytosolic RNA and dsDNA. In this study, we cloned STING cDNAs from zebrafish and showed that it was an ortholog to mammalian STING. We demonstrated that overexpression of this ER protein in fish cells led to a constitutive induction of IFN and interferon-stimulated genes (ISGs). STING-overexpressing cells were almost fully protected against RNA virus infection with a strong inhibition of both DNA and RNA virus replication. In addition, we found that together with MAVS, STING was an important player in the RIG-I IFN-inducing pathway. This report provides the demonstration that teleost fish possess a functional RLR pathway in which MAVS and STING are downstream signaling molecules of RIG-I. The Sequences presented in this article have been submitted to GenBank under accession numbers: Zebrafish STING (HE856619); EPC STING (HE856620); EPC IRF3 (HE856621); EPC IFN promoter (HE856618).
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Affiliation(s)
- Stéphane Biacchesi
- Unité de Virologie et d'Immunologie Moléculaires, INRA, CRJ, Jouy-en-Josas, France.
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Zhang YB, Gui JF. Molecular regulation of interferon antiviral response in fish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2012; 38:193-202. [PMID: 22721905 DOI: 10.1016/j.dci.2012.06.003] [Citation(s) in RCA: 206] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 06/08/2012] [Accepted: 06/08/2012] [Indexed: 05/07/2023]
Abstract
Interferon (IFN) response is the first line of host defense against virus infection. The recent years have witnessed tremendous progress in understanding of fish IFN antiviral response. Varied number of IFN genes has been identified in different fish species but obviously, they do not show a one-to-one orthologous relationship with mammalian IFN homologs. These genes are divided into two groups with different abilities to induce downstream gene expression through binding to different receptor complexes. Consistently, some fish IFN-stimulated genes such as Mx and PKR have been confirmed for their antiviral effects. In this review, we focus on how fish cells respond to IFNs and how fish IFNs are triggered through TLR pathway and RLR pathway. We highlight the roles of IRF3 and IRF7 in activation of fish IFN response. In addition, the unique mechanisms underlying IRF3/7-dependent fish IFN response and auto-regulation of fish IFN gene expression are discussed.
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Affiliation(s)
- Yi-Bing Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Wan Q, Wicramaarachchi WDN, Whang I, Lim BS, Oh MJ, Jung SJ, Kim HC, Yeo SY, Lee J. Molecular cloning and functional characterization of two duplicated two-cysteine containing type I interferon genes in rock bream Oplegnathus fasciatus. FISH & SHELLFISH IMMUNOLOGY 2012; 33:886-898. [PMID: 22889848 DOI: 10.1016/j.fsi.2012.07.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/18/2012] [Accepted: 07/29/2012] [Indexed: 06/01/2023]
Abstract
Two type I interferon (IFN) genes, designated as rbIFN1 and rbIFN2, have been cloned and characterized in rock bream. They are both comprised of 5 exons and 4 introns, and are closely linked on the rock bream chromosome in a unique head-to-head configuration. Both genes encode 183 amino acid (aa) precursor with a putative 17 aa signal peptide in the N-terminal. Only one amino acid divergence is present between two IFNs. Compared with the type I IFNs in higher vertebrates, two rock bream IFNs possess conserved alpha helical structure and share approximately 20% identity in aa sequence. The highest aa sequence homology (83.2%) was found with European seabass IFNs. Phylogenetic analysis grouped two rock bream IFNs into the subgroup-d of two-cysteine containing IFNs. The gene synteny analysis revealed that they are orthologous with the zebrafish IFNφ4 on chromosome-12 and paralogous to each other, which are likely derived from a gene duplication event followed by an inversion. A number of cis-regulatory elements associated with immune response including 15 IRF and 6 NF-κB binding sites are predicted in the shared 4.5 kb 5'-flanking region. Highest constitutive expression of two IFNs was detected in blood cells and skin. Their expression in blood cells and head kidney was up-regulated by lipopolysaccharide, poly I:C, Edwardsiella tarda, Streptococcus iniae and iridovirus. Furthermore, recombinant rbIFN1 protein produced by E. coli induced a rapid and transient expression of the interferon inducible Mx gene in head kidney cells. These results suggest that two duplicated type I IFN genes are involved in rock bream host response to both viral and bacterial pathogens.
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Affiliation(s)
- Qiang Wan
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Republic of Korea
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