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Efficient adventitial gene delivery to rabbit carotid artery with cationic polymer-plasmid complexes
M P Turunen1, M O Hiltunen, M Ruponen
1AI Virtanen Institute, University of Kuopio, Finland.
Gene Therapy
|May 26, 1999
Summary
Fractured dendrimers and polyethylenimines (PEI) show high efficiency for arterial gene therapy. In vitro screening effectively predicts in vivo gene transfer methods, but optimal charge ratios require in vivo adjustment.
Area of Science:
- Biomedical Engineering
- Gene Therapy
- Nanotechnology
Background:
- Developing efficient and safe gene delivery vehicles is crucial for arterial gene therapy.
- In vitro screening can guide the selection of promising candidates for in vivo studies.
Purpose of the Study:
- To evaluate different lipids and cationic polymers for gene transfer into vascular cells.
- To identify efficient gene delivery systems for arterial gene therapy using an in vivo model.
Main Methods:
- In vitro transfection of smooth muscle and endothelial cells with lacZ gene.
- In vivo adventitial gene transfer in rabbit carotid arteries using plasmid-polymer complexes.
- Toxicity assessment via MTT assay and transfection efficiency via X-gal staining.
Main Results:
- Fractured dendrimers (G6) and 25 kDa PEI demonstrated the highest in vivo gene transfer efficiencies.
- Gene transfer efficiency varied with polymer type and charge ratio, necessitating in vivo optimization.
- Naked DNA showed minimal gene transfer, while no inflammation was observed.
Conclusions:
- In vitro cell culture models can predict effective in vivo gene transfer methods for arterial gene therapy.
- Fractured dendrimers and PEI are promising gene delivery vehicles for adventitial arterial gene therapy.