PMID- 12539150 OWN - NLM STAT- MEDLINE DCOM- 20040219 LR - 20061115 IS - 1099-498X (Print) IS - 1099-498X (Linking) VI - 5 IP - 2 DP - 2003 Feb TI - Analysis of site-specific transgene integration following cotransduction with recombinant adeno-associated virus and a rep encodingplasmid. PG - 120-9 AB - BACKGROUND: Recombinant adeno-associated virus (rAAV) has many advantages for gene therapeutic applications in comparison with other vector systems. One of the most promising features is the ability of wild-type (wt) AAV to integrate site-specifically into human chromosome 19. However, this feature is lost in rAAV vectors due to the removal of the rep-coding sequences. METHODS: HeLa cells were transfected with a rep expression plasmid, infected by rAAV and grown with or without selection pressure. Single cell clones were generated and genomic DNA was analyzed for site-specific integration by Southern blotting analysis and fluorescence in situ hybridization (FISH). RESULTS: Transfection of HeLa cells with a rep expression plasmid followed by transduction with a rAAV vector resulted in site-specific integration of the transgene at AAVS1 on human chromosome 19 in 7 of 10 cell clones analyzed. In marked contrast, transduction of cells with rAAV alone did not result in any site-specific integration of the transgene. CONCLUSIONS: The high frequency with which the site-specific integration took place in the presence of Rep protein is comparable with the results observed with wtAAV. These results offer opportunities for the development of specifically integrating rAAV vectors. CI - Copyright 2002 John Wiley & Sons, Ltd. FAU - Huttner, Nadja A AU - Huttner NA AD - Gene Center of the Ludwig-Maximilians-University Munich, Feodor-Lynen-Str. 25, 81377 Munich, Germany. FAU - Girod, Anne AU - Girod A FAU - Schnittger, Susanne AU - Schnittger S FAU - Schoch, Claudia AU - Schoch C FAU - Hallek, Michael AU - Hallek M FAU - Buning, Hildegard AU - Buning H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Gene Med JT - The journal of gene medicine JID - 9815764 RN - 0 (DNA-Binding Proteins) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Viral Proteins) RN - 137750-19-7 (rep proteins, Adeno-associated virus 2) SB - IM MH - Adenoviridae/*genetics MH - Chromosomes, Human, Pair 19/genetics/metabolism MH - DNA-Binding Proteins/genetics/*metabolism MH - HeLa Cells MH - Humans MH - In Situ Hybridization, Fluorescence MH - Plasmids/*genetics MH - Recombinant Fusion Proteins/genetics/metabolism MH - *Transduction, Genetic MH - *Transgenes MH - Viral Proteins/genetics/*metabolism EDAT- 2003/01/23 04:00 MHDA- 2004/02/20 05:00 CRDT- 2003/01/23 04:00 PHST- 2003/01/23 04:00 [pubmed] PHST- 2004/02/20 05:00 [medline] PHST- 2003/01/23 04:00 [entrez] AID - 10.1002/jgm.324 [doi] PST - ppublish SO - J Gene Med. 2003 Feb;5(2):120-9. doi: 10.1002/jgm.324.