Targeted Transgene Insertion Into Human Chromosomes by Adeno-Associated Virus Vectors

Nat Biotechnol. 2002 Jul;20(7):735-8. doi: 10.1038/nbt0702-735.

Abstract

Efficient methods are needed for the precise genetic manipulation of diploid human cells, in which cellular senescence and low conventional gene targeting rates limit experimental and therapeutic options. We have shown previously that linear, single-stranded DNA vectors based on adeno-associated virus (AAV) could accurately introduce small (<20 bp) genetic modifications into homologous human chromosomal sequences. Here we have used AAV vectors to introduce large (>1 kb) functional transgene cassettes into the hypoxanthine phosphoribosyl transferase (HPRT) and Type I collagen (COL1A1) loci in normal human fibroblasts. The transgene cassettes are inserted at high frequencies (1% of the total cell population under optimal conditions) and without secondary mutations. Selection for the inserted transgene cassette can be used to enrich for targeting events, such that >70% of surviving cells have undergone gene targeting with an appropriately designed vector. This approach should prove useful both for functional genomic analysis in diploid human cells and for therapeutic gene targeting.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.
  • Technical Report

MeSH terms

  • Cells, Cultured
  • Chromosomes, Human*
  • Collagen Type I / genetics
  • Dependovirus / genetics*
  • Dependovirus / immunology
  • Fibroblasts / immunology
  • Fibroblasts / physiology
  • Gene Targeting / methods*
  • Gene Transfer Techniques
  • Genetic Vectors / genetics*
  • Humans
  • Hypoxanthine Phosphoribosyltransferase / genetics*
  • Male
  • Molecular Sequence Data
  • Mutagenesis, Insertional / methods
  • Transgenes*

Substances

  • Collagen Type I
  • Hypoxanthine Phosphoribosyltransferase

Associated data

  • RefSeq/NC_001479