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Enhanced gene delivery by avidin-displaying baculovirus
Jani K Räty1, Kari J Airenne, Ari T Marttila
1A. I. Virtanen Institute, Department of Biotechnology and Molecular Medicine, University of Kuopio, P.O. Box 1627, FIN-70120 Kuopio, Finland.
Summary
Avidin display on baculovirus (Baavi) enhances gene delivery efficiency. This versatile method improves viral targeting and properties for effective gene therapy applications.
Area of Science:
- Virology
- Biotechnology
- Gene Therapy
Background:
- Modifying virus surface properties is crucial for improving gene delivery efficiency and targeting.
- High-affinity receptor-ligand pairs, like avidin and biotin, offer a promising strategy for surface functionalization.
Purpose of the Study:
- To construct an avidin-displaying baculovirus (Baavi) for enhanced and targeted gene delivery.
- To evaluate the impact of avidin display on viral transduction efficiency and targeting capabilities.
Main Methods:
- Construction and characterization of avidin-displaying baculovirus (Baavi) using immunoblotting and electron microscopy.
- Quantification of biotin-binding sites using fluorescence-correlation spectroscopy and IAsys optical biosensor.
- Assessment of transduction efficiency in different cell lines and evaluation of targeted delivery using biotinylated ligands.
Main Results:
- Successful display of avidin on the baculovirus envelope was confirmed.
- Baavi exhibited significantly increased transduction efficiency in rat malignant glioma and rabbit aortic smooth muscle cells compared to wild-type baculovirus.
- Biotinylated epidermal growth factor (EGF) facilitated specific targeting to EGF receptor-expressing cells, and biotinylated paramagnetic particles enabled magnetic targeting.
Conclusions:
- Avidin display is a rapid and versatile method for enhancing baculovirus properties for gene delivery.
- This approach significantly improves transduction efficiency and enables targeted delivery through various biotinylated ligands.
- Avidin-displaying baculovirus holds potential for advanced gene therapy applications.