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| 论文摘要： | The iIFN1a (intracellular IFN-a1), that is one of the IFN-a1 variants, was shown to be functional intracellularly and act as a novel defense against an infectious.hematopoietic necrosis virus (IHNV). To determine its antiviral properties, a recombinant iIFN1a was generated in Escherichia coli. Its antiviral activity against IHNV was 1.69 x 10(7) U/mg in CHSE-214 cells. Additionally, iIFN1a was capable of inducing comparable levels of IRF-1, IRF-2, IFN-1, IFN-gamma and Mx transcription in head kidney, spleen and liver tissues at an early time point (6 h), that was followed by a rapid decline 24 h after induction. The recombinant protein also elicited protection against IHNV in vivo. At 6 and 24 h after induction there was 100% protection against the virus, however, at 48 and 72 h the protection decreased to 57 and 40%, respectively. The in vivo protection kinetics correlated with the kinetics of gene expression. The results of this study provide details of the antiviral state that was induced by iIFN1a in vivo for the first time. Additionally, this information will facilitate the development of this recombinant protein as a potential anti-viral treatment and/or adjuvant. (C) 2016 Elsevier Ltd. All rights reserved. |
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