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Nafeez Ahmed A, Mithra S, Suryakodi S, Taju G, Abdul Wazith MJ, Kanimozhi K, Rajkumar V, Badhusha A, Abdul Majeed S, Sahul Hameed AS. Development and characterization of brain cell line from Trachinotus blochii and its application in virological and gene expression studies. J Fish Dis 2024; 47:e13927. [PMID: 38284337 DOI: 10.1111/jfd.13927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/08/2024] [Accepted: 01/14/2024] [Indexed: 01/30/2024]
Abstract
A permanent cell line, SPB (Snubnose pompano brain) was established from Trachinotus blochii by the explant culture method. It has been sub-cultured more than 75 passages and showed optimal growth at 28°C using L-15 medium supplemented with 15% to 20% FBS. The SPB cells were cryopreserved at different passage levels for various applications. SPB cells were composed of fibroblastic and epithelial-like cells. The SPB cells were tested for mycoplasma contamination which was found to be negative. The origin of the SPB cell line from T. blochii was confirmed by amplification of the mitochondrial cytochrome oxidase I (COI) gene. The transfection efficiency of SPB cell line is 15% assessed by expression of green fluorescent protein using pEGFP-N1 plasmid. In addition, two CMV promotor plasmids pFNCPE42-DNA and pcDNAVP28 were transfected to SPB cells and it shows high expression levels of FNCP of fish nodavirus and VP28 protein of white spot syndrome virus by immunostaining. The SPB cells showed susceptibility to SJNNV and the infection was confirmed by RT-PCR, Western blot, ELISA, TCID50 and RT-qPCR. Experimental infection was carried out in T. blochii using SJNNV propagated in SPB cell line and found 100% mortality with clinical signs. The infection was confirmed by RT-PCR. The SPB cell line can be used for propagation of fish viral pathogens and production of the recombinant proteins.
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Affiliation(s)
- A Nafeez Ahmed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - S Mithra
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - S Suryakodi
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - G Taju
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - M J Abdul Wazith
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - K Kanimozhi
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - V Rajkumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - A Badhusha
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - S Abdul Majeed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
| | - A S Sahul Hameed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, India
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Vázquez-Salgado L, Olveira JG, Dopazo CP, Bandín I. Detection of different Betanodavirus genotypes in wild fish from Spanish Atlantic coastal waters (Galicia, northwestern Spain). J Aquat Anim Health 2024; 36:57-69. [PMID: 37787030 DOI: 10.1002/aah.10201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 10/04/2023]
Abstract
OBJECTIVE The nervous necrosis virus (NNV; genus Betanodavirus) is an aquatic pathogen that is responsible for a neurological disease affecting marine fish. Despite its almost worldwide distribution, global warming could favor the spread of NNV to new areas, highlighting the importance of conducting epidemiological surveys on both wild and farmed marine fish species. In this study, we assessed NNV prevalence in wild fish caught along the Galician Atlantic coast. METHODS In total, 1277 fish were analyzed by reverse transcription real-time polymerase chain reaction. RESULT Twenty two (1.72%) of those fish tested positive for NNV, including two species in which the pathogen had not yet been reported. CONCLUSION The reassortant RGNNV/SJNNV (red-spotted grouper NNV/striped jack NNV) was detected in 55% of NNV-positive individuals, while the remaining 45% harbored the SJNNV-type genome. Moreover, from European Pilchard Sardina pilchardus and Atlantic Mackerel Scomber scombrus, we isolated four reassortant strains that carried amino acid mutations at key sites related to NNV-host interaction.
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Affiliation(s)
- Lucía Vázquez-Salgado
- Instituto de Acuicultura, Departamento de Microbiología y Parasitología, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - José G Olveira
- Instituto de Acuicultura, Departamento de Microbiología y Parasitología, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Carlos P Dopazo
- Instituto de Acuicultura, Departamento de Microbiología y Parasitología, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Isabel Bandín
- Instituto de Acuicultura, Departamento de Microbiología y Parasitología, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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Moreno P, Lopez-Jimena B, Randelli E, Scapigliati G, Buonocore F, Garcia-Rosado E, Borrego JJ, Alonso MC. Immuno-related gene transcription and antibody response in nodavirus (RGNNV and SJNNV)-infected European sea bass (Dicentrarchus labrax L.). Fish Shellfish Immunol 2018; 78:270-278. [PMID: 29702239 DOI: 10.1016/j.fsi.2018.04.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/19/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
The immune response of European sea bass to RGNNV and SJNNV infections has been evaluated by quantifying the transcription of some genes involved in the IFN I system, as well as in the inflammatory and adaptive immune mechanisms. The transcription of IFN-I, ISG-12, ISG-15 and MxA genes has been analyzed in brain and head kidney, showing that RGNNV genotype induces a more intense response of the IFN I system than SJNNV in both organs. In addition, the results obtained indicate the importance of the inflammatory response in nodavirus pathogenesis, with the transcription of IL-8 and TNF-α significantly higher in brain than in head kidney, being RGNNV the strongest inductor. An important difference between the immune response induced by both genotypes refers to the IgM titre in sera, which was higher in SJNNV-inoculated fish. The acquired response is also important locally, since TR-γ transcription is higher in brain than in head kidney (especially in the RGNNV-inoculated group). To our knowledge, this is the first study addressing the sea bass anti-SJNNV immune response.
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Affiliation(s)
- Patricia Moreno
- Universidad de Málaga, Departamento de Microbiología, Facultad de Ciencias, 29071 Málaga, Spain
| | - Benjamin Lopez-Jimena
- Mast Group Ltd., Mast House, Derby Road, Bootle, Merseyside, L20 1EA, England, United Kingdom
| | - Elisa Randelli
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
| | - Giuseppe Scapigliati
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
| | - Francesco Buonocore
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
| | - Esther Garcia-Rosado
- Universidad de Málaga, Departamento de Microbiología, Facultad de Ciencias, 29071 Málaga, Spain
| | - Juan J Borrego
- Universidad de Málaga, Departamento de Microbiología, Facultad de Ciencias, 29071 Málaga, Spain
| | - M Carmen Alonso
- Universidad de Málaga, Departamento de Microbiología, Facultad de Ciencias, 29071 Málaga, Spain.
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Álvarez-Torres D, Gómez-Abellán V, Arizcun M, García-Rosado E, Béjar J, Sepulcre MP. Identification of an interferon-stimulated gene, isg15, involved in host immune defense against viral infections in gilthead seabream (Sparus aurata L.). Fish Shellfish Immunol 2018; 73:220-227. [PMID: 29277364 DOI: 10.1016/j.fsi.2017.12.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/07/2017] [Accepted: 12/18/2017] [Indexed: 06/07/2023]
Abstract
Interferons (IFNs) play a key role in the innate immunity of vertebrates against viral infections by inducing hundreds of IFN-stimulated genes (ISGs), such as isg15. Isg15 is an ubiquitin-like protein, which can conjugate cellular and viral proteins in a process called ISGylation, although it can also act as a cytokine-like protein. Gilthead seabream (Sparus aurata L.) is an important asymptomatic carrier of viral haemorrhagic septicaemia virus (VHSV) and nodavirus, representing a threat to other co-cultivated susceptible species. In order to better understand virus-host interactions in this fish species, this study addresses the identification and molecular characterization of seabream isg15 (sb-isg15). In addition, the modulation of transcript levels of sb-isg15 was analysed in SAF-1 cells and seabream acidophilic granulocytes (AGs) stimulated in vitro with different pathogen-associated molecular patterns (PAMPs) or inoculated with VHSV and striped jack nervous necrosis virus (SJNNV). The full-length cDNA of sb-isg15 gene, encoding a predicted protein of 155 amino acids, was identified and seen to share the same characteristics as other fish and mammalian isg15 genes. Here we report the clear induction of sb-isg15 transcript levels in SAF-1 cells and AGs stimulated with toll-like receptor (TLR) ligands, such as polyinosinic:polycytidylic acid (poly I:C) or genomic DNA from Vibrio anguillarum (VaDNA), respectively. Furthermore, VHSV and SJNNV inoculation induced a significant degree of sb-isg15 transcription in SAF-1 cells and AGs. However, the relative levels of viral RNA transcription showed that SJNNV replication seems to be more efficient than VHSV in both in vitro systems. Interestingly, sb-isg15 transcript induction elicited by VaDNA was reduced in VHSV- and SJNNV-inoculated AGs, suggesting an interference prompted by the viruses against the type I IFN system. Taken together, these findings support the use of seabream AGs as a valuable experimental system to study virus-host interactions, in which sb-isg15 seems to play an important role.
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Affiliation(s)
- Daniel Álvarez-Torres
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain; Departamento de Genética, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
| | - Victoria Gómez-Abellán
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, IMIB-Arrixaca, 30100 Murcia, Spain
| | - Marta Arizcun
- Centro Oceanográfico de Murcia, Instituto Español de Oceanografía (IEO), 30860 Murcia, Spain
| | - Esther García-Rosado
- Departamento de Microbiología, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
| | - Julia Béjar
- Departamento de Genética, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
| | - María P Sepulcre
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, IMIB-Arrixaca, 30100 Murcia, Spain.
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