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Characterization of an aFGF gene expression vector with therapeutic potential
M T Tchorzewski1, M D Duncan, P Nass
1Section of Surgical Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, 21224, USA.
The Journal of Surgical Research
|September 12, 1998
Summary
Gene transfection of fibroblasts enables continuous delivery of acidic fibroblast growth factor (aFGF) for enhanced wound healing. This method ensures sustained therapeutic levels, promising improved clinical applications for tissue repair.
Area of Science:
- Molecular Biology
- Biotechnology
- Regenerative Medicine
Background:
- Topical growth factor application for wound healing is often suboptimal.
- Continuous, local delivery of growth factors is needed for effective epithelialization and accelerated healing.
Purpose of the Study:
- To investigate the potential of transfecting fibroblasts with the acidic fibroblast growth factor (aFGF) gene for sustained local delivery.
- To establish a method for continuous, localized release of aFGF to promote wound healing and tissue regeneration.
Main Methods:
- Utilized a pMEXneo vector with the human aFGF gene and a secretory signal sequence.
- Transfected NIH 3T3 fibroblasts using a liposomal reagent and cultured them in selective media.
Main Results:
- Confirmed plasmid DNA presence in transfected fibroblasts via dot blot hybridization.
- Quantified high levels of secreted aFGF (32 +/- 7 nM) in the media by ELISA, with low intracellular concentrations.
- Demonstrated sustained aFGF concentrations capable of stimulating cell proliferation for several weeks.
Conclusions:
- Successfully transcribed and translated aFGF cDNA into a functional, secreted polypeptide from NIH 3T3 cells.
- Stable transfection yielding sustained secretion of physiologically significant aFGF levels shows promise for clinical wound healing applications.
- Potential for topical or endoscopic injection of transfection vectors for therapeutic delivery.