Construction of a Novel Bovine Papillomavirus Vector Without Detectable Transforming Activity Suitable for Gene Transfer

Yuichiro Ohe, Dongyan Zhao, Nagahiro Saijo, Eckhard R. Podack

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Bovine papillomavirus type 1 (BPV-1)-derived vectors may be useful for gene therapy because of their episomal maintenance at intermediate to high copy number and stable, high-level expression of gene products. To increase the safety of BPV-1 for human trials, the transforming early genes E5, E6, and E7 were deleted and a new vector, B45-Neo, was established and its transforming potential, episomal maintenance, and cDNA expression determined. Deletion of E5, E6, and E7, caused a decrease of the copy number to 80 in 3T3 fibroblasts when B45-Neo was compared to the parent vector that supported more than 1,000 copies per cell. No significant difference in the copy number, which ranged between 13 and 30 per cell, was detected in other cell lines of murine or human origin. The episomal maintenance of B45 and its ability to express cDNA was retained. B45-Neo, in contrast to BMG-Neo, however, was unable to transform NIH-3T3 and C1271 cells in soft agar colony assays. Unlike BMG-Neo, B45-Neo did not cause morphological changes in 3T3 and C1271 cells characteristic for transformation. It is concluded that B45-Neo is an efficient expression vector without detectable transforming activity and may be useful and safe for human gene therapy trials.

Original languageEnglish (US)
Pages (from-to)325-333
Number of pages9
JournalHuman gene therapy
Volume6
Issue number3
DOIs
StatePublished - Mar 1 1995

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics

Fingerprint Dive into the research topics of 'Construction of a Novel Bovine Papillomavirus Vector Without Detectable Transforming Activity Suitable for Gene Transfer'. Together they form a unique fingerprint.

  • Cite this