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Transduction of Human Cells with Polymer-complexed Ecotropic Lentivirus for Enhanced Biosafety
Published on: July 24, 2011
Virus-like gene transfer into cells mediated by polyoma virus pseudocapsids
N Krauzewicz1, J Stokrová, C Jenkins
1MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital, Ducane Road, London, W12 0NN, UK.
Gene Therapy
|February 27, 2001
Summary
Mouse polyoma virus-like particles efficiently deliver DNA for gene expression. This gene delivery system utilizes viral pathways, not nonviral routes, for effective transport into cells.
Area of Science:
- Molecular Biology
- Virology
- Gene Therapy
Background:
- Mouse polyoma virus-like particles (pseudocapsids) are constructed from recombinant viral coat proteins.
- These particles can bind DNA and facilitate gene expression within cells and in vivo.
- Understanding the mechanism of gene delivery is crucial for developing effective gene therapy vectors.
Purpose of the Study:
- To investigate the mechanism of DNA transfer mediated by mouse polyoma virus-like particles.
- To determine if pseudocapsid-mediated gene delivery utilizes cellular pathways similar to native polyoma virions.
- To identify factors influencing the efficiency and specificity of pseudocapsid-based gene delivery.
Main Methods:
- In vitro DNA packaging and transfer assays.
- Cell culture experiments assessing gene expression.
- Microscopy to analyze cellular uptake and transport pathways (microtubules, actin).
- Investigating the role of cell surface sialic acid residues.
Main Results:
- DNA transfer into cells requires partial packaging of DNA within the pseudocapsid.
- Cell surface sialic acid and intact microtubules are essential for productive gene expression, mirroring native virion infectivity.
- Pseudocapsid-mediated gene delivery follows viral pathways, distinct from nonviral methods like liposomes.
- While all cells internalize complexes, only a subset achieves productive gene delivery, suggesting distinct transport routes.
Conclusions:
- Pseudocapsids exhibit virus-like properties, utilizing specific cellular machinery for gene delivery.
- The findings highlight the potential of pseudocapsids as a gene delivery vehicle by leveraging natural viral entry pathways.
- Further development of this system could lead to highly efficient and targeted gene therapy applications.
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