TY - JOUR
T1 - Efficient non-viral integration and stable gene expression in multipotent adult progenitor cells
AU - Wilber, Andrew
AU - Ulloa Montoya, Fernando
AU - Hammer, Luke
AU - Moriarity, Branden S.
AU - Geurts, Aron M.
AU - Largaespada, David A.
AU - Verfaillie, Catherine M.
AU - McIvor, R. Scott
AU - Lakshmipathy, Uma
PY - 2011
Y1 - 2011
N2 - Non-viral integrating systems, PhiC31 phage integrase (φC31), and Sleeping Beauty transposase (SB), provide an effective method for ex vivo gene delivery into cells. Here, we used a plasmid-encoding GFP and neomycin phosphotransferase along with recognition sequences for both φC31 and SB integrating systems to demonstrate that both systems effectively mediated integration in cultured human fibroblasts and in rat multipotent adult progenitor cells (rMAPC). Southern blot analysis of G418-resistant rMAPC clones showed a 2-fold higher number of SB-mediated insertions per clone compared to φC31. Sequence identification of chromosomal junction sites indicated a random profile for SB-mediated integrants and a more restricted profile for φC31 integrants. Transgenic rMAPC generated with both systems maintained their ability to differentiate into liver and endothelium albeit with marked attenuation of GFP expression. We conclude that both SB and φC31 are effective non-viral integrating systems for genetic engineering of MAPC in basic studies of stem cell biology.
AB - Non-viral integrating systems, PhiC31 phage integrase (φC31), and Sleeping Beauty transposase (SB), provide an effective method for ex vivo gene delivery into cells. Here, we used a plasmid-encoding GFP and neomycin phosphotransferase along with recognition sequences for both φC31 and SB integrating systems to demonstrate that both systems effectively mediated integration in cultured human fibroblasts and in rat multipotent adult progenitor cells (rMAPC). Southern blot analysis of G418-resistant rMAPC clones showed a 2-fold higher number of SB-mediated insertions per clone compared to φC31. Sequence identification of chromosomal junction sites indicated a random profile for SB-mediated integrants and a more restricted profile for φC31 integrants. Transgenic rMAPC generated with both systems maintained their ability to differentiate into liver and endothelium albeit with marked attenuation of GFP expression. We conclude that both SB and φC31 are effective non-viral integrating systems for genetic engineering of MAPC in basic studies of stem cell biology.
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U2 - 10.4061/2011/717069
DO - 10.4061/2011/717069
M3 - Article
C2 - 21977042
AN - SCOPUS:84855259897
SN - 1687-966X
JO - Stem Cells International
JF - Stem Cells International
M1 - 717069
ER -