A soluble nonglycosylated recombinant infectious hematopoietic necrosis virus (IHNV) G-protein induces IFNs in rainbow trout (Oncorhynchus mykiss).
Viral glycoproteins interact with cell-surface receptors to mediate virus entry and innate immune system activation. We found that a soluble recombinant infectious hematopoietic necrosis virus G-protein (rIHNV-G) stimulated an early innate immune response mediated by proinflammatory cytokines, IFN1 and IFN-gamma in rainbow trout (Oncorhynchus mykiss) fry. Expression of both IFN1 and IFN-gamma mRNA transcripts was an early event and was rIHNV-G dose-dependent. In addition, preliminary evidence revealed that the innate immune response induced by rIHNV-G protein could protect rainbow trout fry from a subsequent IHNV virus challenge. Finally, the binding and distribution of FITC-rIHNV-G protein on rainbow trout spleen and head kidney leukocytes resemble morphological changes which occur on the cell membrane during antigen-receptor interaction including membrane reorganization, patching, polarization and capping. Thus a soluble nonglycosylated rIHNV-G protein could mediate the activation of rainbow trout leukocytes, with concomitant production of proinflammatory cytokines and IFNs.
Verjan
Noel
N
Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
Ooi
Ei Lin
EL
Nochi
Tomonori
T
Kondo
Hidehiro
H
Hirono
Ikuo
I
Aoki
Takashi
T
Kiyono
Hiroshi
H
Yuki
Yoshikazu
Y
D000818:Animals; D002460:Cell Line; D004926:Escherichia coli / Q000235:genetics; D005393:Fish Diseases / Q000401:mortality / Q000517:prevention & control; D007113:Immunity, Innate / Q000276:immunology*; D029142:Infectious hematopoietic necrosis virus / Q000235:genetics; D007372:Interferons / Q000235:genetics*; D007668:Kidney; D007962:Leukocytes / Q000378:metabolism; D017686:Oncorhynchus mykiss / Q000276:immunology* / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018353:Rhabdoviridae Infections / Q000401:mortality / Q000517:prevention & control / Q000662:veterinary; D013154:Spleen; D014760:Viral Fusion Proteins / Q000235:genetics / Q000276:immunology*; D014765:Viral Vaccines / Q000276:immunology*
D011994:Recombinant Proteins; D014760:Viral Fusion Proteins; D014765:Viral Vaccines; D007372:Interferons