Abstract:
:We have used a particular folate receptor, which is overexpressed in tumor cells, for targeted DNA delivery into these cell types. This folate receptor internalizes folate through caveolae by a process named potocytosis, which is distinct from endocytosis, through clathrin-coated pits. When folate conjugated to poly-L-lysine was used to deliver the E. coli beta-galactosidase gene into tumor cells overexpressing the folate receptor, only low levels of beta-galactosidase activity were detectable. When a replication-defective adenovirus was coincubated with the DNA/folate complexes, 20 to 30% of the cells stained blue with X-gal and a 1000-fold increase of beta-galactosidase activity was observed. Thus, for high efficient DNA delivery and gene expression via the caveolae system, a potosomal disruption agent is needed. Furthermore, folate-mediated DNA delivery is restricted to tumor cells that highly overexpress the folate receptor, which will permit future development of tumor cell-specific delivery of toxic genes for cancer gene therapy.
journal_name
Gene Therjournal_title
Gene therapyauthors
Gottschalk S,Cristiano RJ,Smith LC,Woo SLsubject
Has Abstractpub_date
1994-05-01 00:00:00pages
185-91issue
3eissn
0969-7128issn
1476-5462journal_volume
1pub_type
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