Efficient expression of the envelope protein of feline immunodeficiency virus in a recombinant feline herpesvirus type 1 (FHV-1) using the gC promoter of FHV-1

Eiji Sato, Naoaki Yokoyama, Takayuki Miyazawa, Ken Maeda, Yasuhiro Ikeda, Yorihiro Nishimura, Kentaro Fujita, Mariko Kohmoto, Eiji Takahashi, Takeshi Mikami

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We constructed two recombinant feline herpesvirus type 1 (FHV-1) expressing the envelope (Env) protein of feline immunodeficiency virus (FIV). One recombinant, designated dlTK-env, has the whole FIV env gene inserted at a thymidine kinase (TK) deletion site. The second recombinant, designated dlTK(gCp)-env, has a cassette containing a partial FIV env gene fused with the signal sequence of the gC protein of FHV-1 (under the control of the gC promoter) inserted at the same site. Growth kinetics of both the recombinants in Crandell feline kidney (CRFK) cells were similar to that of the parent strain of FHV-1. By indirect immunofluorescence assays and immunoblot analyses, we confirmed the expression of the FIV Env protein in CRFK cells infected with both recombinants. Enzyme-linked immunosorbent assays showed that the maximum Env expression level achieved by dlTK(gCp)-env was more than four times higher than that observed for dlTK-env. Flow cytometric analyses revealed that the Env protein produced by both recombinants was efficiently expressed on the cell surface. The dlTK(gCp)-env reported here may thus be a promising candidate for a live recombinant vaccine to protect against FIV infection. (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)13-23
Number of pages11
JournalVirus Research
Volume70
Issue number1-2
DOIs
StatePublished - Nov 22 2000

Keywords

  • Expression
  • FHV-1
  • FIV env gene
  • Recombinant virus
  • Vaccine

ASJC Scopus subject areas

  • Cancer Research
  • Virology
  • Infectious Diseases

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