title: Coexpression of double or triple copies of the rabies virus glycoprotein gene using a 'self-cleaving' 2A peptide-based replication-defective human adenovirus serotype 5 vector.
abstract: Rabies virus glycoprotein (RVG) is a major structural protein and antigen of rabies virus that induces a highly immunogenic response. In the present study, we have used 2A self-cleaving sequence of the foot-and-mouth disease virus (FMDV) to express double or triple copies of the RVG from a single open reading frame derived from human adenovirus 5 (AdHu5). The recombinant adenoviruses produce similar virus titers, indicating that the insertion of double or triple copies of the RVG gene linked with the FMDV 2A sequence does not affect virus replication. The RVG was efficiently expressed by constructs containing the 2A sequence and retained its antigenic property. The 2A self-cleaving peptide mediated efficient generation of individual glycoprotein in transient expression assay and did not lead to an altered surface distribution of RVG. Flow cytometry demonstrated that the expression levels of RVG were improved in recombinant Ads carrying multiple RVG gene copies. We conclude that ribosome skipping induced by the FMDV 2A sequence is an effective strategy to express multiple glycoprotein genes of rabies virus in adenoviruses and 2A-containing recombinant Ads may represent an attractive alternative to other coexpression strategies for multiple gene expression.
authors.affiliation: College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
authors.forename: Yeping
authors.initials: Y
authors.lastname: Tan
authors.forename: Hongru
authors.initials: H
authors.lastname: Liang
authors.forename: Aie
authors.initials: A
authors.lastname: Chen
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Guo
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D002478:Cells, Cultured; D003001:Cloning, Molecular; D006224:Cricetinae; D004261:DNA Replication / Q000235:genetics; D018628:Gene Dosage / Q000235:genetics*; D005786:Gene Expression Regulation; D005822:Genetic Vectors / Q000235:genetics; D006801:Humans; D011499:Protein Processing, Post-Translational / Q000235:genetics; D021382:Protein Sorting Signals / Q000235:genetics; D011819:Rabies Vaccines / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D011820:Rabies virus / Q000235:genetics*; D014614:Vaccines, Synthetic / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D014760:Viral Fusion Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D014764:Viral Proteins / Q000235:genetics
chemical_list: D021382:Protein Sorting Signals; D011819:Rabies Vaccines; D014614:Vaccines, Synthetic; D014760:Viral Fusion Proteins; D014764:Viral Proteins; C079096:adenovirus 5, rabies glycoprotein recombinant vaccine