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A packaging system for SV40 vectors without viral coding sequences
1Department of Thoracic and Cardiovascular SurgeryJ, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
Analytical Biochemistry
|January 31, 1998
Summary
This study presents a novel system for packaging Simian virus 40 (SV40) vectors using recombinant adenoviruses. This method allows for efficient gene transfer vector production without viral coding sequences, yielding high-purity SV40 vectors.
Area of Science:
- Molecular Biology
- Virology
- Gene Therapy
Background:
- Simian virus 40 (SV40) vectors have been utilized for gene expression in mammalian cells since the 1980s.
- Recent applications include gene transfer in mice and human peripheral blood cells.
- Existing methods for SV40 vector production face limitations.
Purpose of the Study:
- To develop an efficient system for packaging SV40 vectors.
- To achieve high yields of infectious SV40 vectors free of viral coding sequences.
- To optimize the SV40 vector packaging process using recombinant adenoviruses.
Main Methods:
- A system was developed utilizing recombinant adenoviruses to express SV40 capsids.
- Plasmids containing the SV40 replication origin were packaged.
- Helper adenoviruses were heat-inactivated post-packaging.
Main Results:
- The system effectively packaged plasmids into SV40 capsids.
- A high yield of infectious SV40 vector was achieved (approximately 3 x 10^5).
- A high ratio of SV40 to adenoviral vector (approximately 1000:1) was obtained, with heat-inactivated helper adenoviruses showing no impact on SV40 vector infectivity.
Conclusions:
- A novel and efficient method for producing SV40 vectors has been established.
- This system offers a high yield and purity of infectious SV40 vectors.
- The developed packaging system is suitable for gene transfer applications.