Selection of an optimal promoter for gene transfer in normal B cells

Mol Med Rep. 2017 Sep;16(3):3041-3048. doi: 10.3892/mmr.2017.6974. Epub 2017 Jul 14.

Abstract

Gene transfer into normal quiescent human B cells is a challenging procedure. The present study aimed to investigate whether it is possible to increase the levels of transgene expression by using various types of promoters to drive the expression of selected genes‑of‑interest. To produce lentiviral particles, the present study used the 2nd generation psPAX2 packaging vector and the vesicular stomatitis virus ‑expressing envelope vector pMD2.G. Subsequently, lentiviral vectors were generated containing various promoters, including cytomegalovirus (CMV), elongation factor‑1 alpha (EF1α) and spleen focus‑forming virus (SFFV). The present study was unable to induce satisfactory transduction efficiency in quiescent normal B cells; however, infection of normal B cells with Epstein‑Barr virus resulted in increased susceptibility to lentiviral transduction. In addition, the SFFV promoter resulted in a higher level of transgene expression compared with CMV or EF1α promoters. As a proof‑of concept that this approach allows for stable gene expression in normal B cells, the present study used bicistronic lentiviral vectors with genes encoding fluorescent reporter proteins, as well as X‑box binding protein‑1 and binding immunoglobulin protein.

MeSH terms

  • Adult
  • B-Lymphocytes / metabolism*
  • B-Lymphocytes / virology
  • Biomarkers / metabolism
  • CD40 Ligand / metabolism
  • Cell Line, Tumor
  • Cell Proliferation
  • Coculture Techniques
  • Feeder Cells / metabolism
  • Female
  • Fluorescence
  • Gene Expression
  • Gene Transfer Techniques*
  • HEK293 Cells
  • Herpesvirus 4, Human / physiology
  • Humans
  • Internal Ribosome Entry Sites / genetics
  • Lentivirus / genetics
  • Male
  • Middle Aged
  • Promoter Regions, Genetic*
  • Spleen Focus-Forming Viruses / physiology
  • Transduction, Genetic
  • Transgenes

Substances

  • Biomarkers
  • Internal Ribosome Entry Sites
  • CD40 Ligand