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Functional analysis of the CXCR1a gene response to SGIV viral infection in grouper.
- Source :
-
Fish & shellfish immunology [Fish Shellfish Immunol] 2019 May; Vol. 88, pp. 217-224. Date of Electronic Publication: 2019 Feb 23. - Publication Year :
- 2019
-
Abstract
- Chemokine receptors are a superfamily of seven-transmembrane domain G-coupled receptors and have important roles in immune surveillance, inflammation, and development. In previous studies, a series of CXCRs in grouper (Epinephelus coioides) was identified; however, the function of CXCR in viral infection has not been studied. To better understand the effect of the CXCR family on the fish immune response, full-length CXCR1a was cloned, and its immune response to Singapore grouper iridovirus (SGIV) was investigated. Grouper CXCR1a shared a seven-transmembrane (7-TM) region and a G protein-coupled receptor (GPCR) family 1 that contained a triaa stretch (DRY motif). Phylogenetic analysis indicated that CXCR1a showed the nearest relationship to Takifugu rubripes, followed by other fish, bird and mammal species. Fluorescence microscopy revealed that CXCR1a was expressed predominantly in the cytoplasm. Overexpression of CXCR1a in grouper cells significantly inhibited the replication of SGIV, demonstrating that CXCR1a delayed the occurrence of cytopathic effects (CPE) induced by SGIV infection and inhibited viral gene transcription. Furthermore, our results also showed that CXCR1a overexpression significantly increased the expression of interferon-related cytokines and activated ISRE and IFN promoter activities. Taken together, the results demonstrated that CXCR1a might have an antiviral function against SGIV infection.<br /> (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Subjects :
- Animals
Cytokines metabolism
DNA Virus Infections immunology
DNA Virus Infections virology
Fish Diseases immunology
Fish Diseases virology
Microscopy, Fluorescence
Phylogeny
Ranavirus physiology
Virus Replication immunology
Bass genetics
Bass immunology
DNA Virus Infections veterinary
Receptors, Chemokine genetics
Receptors, Chemokine immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1095-9947
- Volume :
- 88
- Database :
- MEDLINE
- Journal :
- Fish & shellfish immunology
- Publication Type :
- Academic Journal
- Accession number :
- 30807858
- Full Text :
- https://doi.org/10.1016/j.fsi.2019.02.046