Molecular characterization and immune functional analysis of IRF2 in common carp (Cyprinus carpio L.): different regulatory role in the IFN and NF-κB signalling pathway

BMC Veterinary Research

Yaoyao Zhu¹  Linlin Zheng²  Fumiao Zhang³  Xinping Chen³  Liguo An³  Guiwen Yang³  Rongrong Liu³  Shijuan Shan³  Hua Li³ 

[1] College of Fisheries and Life Science, Hainan Tropical Ocean University, No. 1 Yucai Road, 572022, Sanya, China;Jinan Eco-environmental Monitoring Center of Shandong Province, No. 17199 Lvyou Road, 250101, Jinan, China;Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, 250014, Jinan, China;

关键词: Cyprinus carpio;    Interferon regulatory factor 2 (IRF2);    Poly (I:C);    Aeromonas hydrophila;    IFN;    NF-κB;   

DOI  :  10.1186/s12917-021-03012-7

来源: Springer

【 摘 要 】

BackgroundInterferon regulatory factor 2 (IRF2) is an important transcription factor, which can regulate the IFN response and plays a role in antiviral innate immunity in teleost.ResultsIn the present study, the full-length cDNA sequence of IRF2 (CcIRF2) was characterized in common carp (Cyprinus carpio L.), which encoded a protein containing a conserved DNA-binding domain (DBD) and an IRF-associated domain (IAD). Phylogenetic analysis showed that CcIRF2 was most closely related with IRF2 of Ctenopharyngodon idella. CcIRF2 transcripts were detectable in all examined tissues, with higher expression in the gills, spleen and brain. CcIRF2 expression was upregulated in immune-related tissues of common carp upon polyinosinic:polycytidylic acid (poly (I:C)) and Aeromonas hydrophila stimulation and induced by poly (I:C), lipopolysaccharide (LPS), peptidoglycan (PGN) and flagellin in the peripheral blood leucocytes (PBLs) and head kidney leukocytes (HKLs). In addition, overexpression of CcIRF2 decreased the expression of IFN and IFN-stimulated genes (ISGs), and a dual-luciferase reporter assay revealed that CcIRF2 could increase the activation of NF-κB.ConclusionsThese results indicate that CcIRF2 participates in antiviral and antibacterial immune response and negatively regulates the IFN response, which provide a new insight into the regulation of IFN system in common carp, and are helpful for the prevention and control of infectious diseases in carp farming.

【 授权许可】

CC BY