Abstract:
:Vectors conjugated with ligands recognized by cell surface receptors are of interest for cystic fibrosis gene therapy since these vectors would allow cell-specific targeting. However, an efficient and specific uptake may be abrogated by a subsequent intracellular trafficking leading to an inefficient gene transfer. This has been shown for polylysine substituted with mannose residues. While mannose-specific membrane lectins are predominantly expressed at the surface of airway cells and mannosylated complexes are the most efficiently incorporated glycosylated complexes in these cells, mannosylated complexes lead to a low gene transfer efficiency because of an inefficient exit from endosomal compartments, a high accumulation in lysosomes and an inefficient nuclear import. In contrast, the entry of low amounts of lactosylated complexes is balanced by more efficient intracellular trafficking, leading to an efficient gene transfer. This emphasizes that for a successful gene transfer, it is necessary to find the balance between efficient and specific uptake, and intracellular trafficking that overcomes the various cellular barriers and enables the plasmid to reach the nucleus.
journal_name
Gene Therjournal_title
Gene therapyauthors
Fajac I,Grosse S,Briand P,Monsigny Mdoi
10.1038/sj.gt.3301738keywords:
subject
Has Abstractpub_date
2002-06-01 00:00:00pages
740-2issue
11eissn
0969-7128issn
1476-5462journal_volume
9pub_type
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