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Expansion and Storage of Insect Cells and Virus Stocks
1NextWaveBio, East Haven, CT, USA. manoncox@nextwavebio.com.
Methods in Molecular Biology (Clifton, N.J.)
|July 1, 2024
Summary
Maintain healthy insect cell cultures for baculovirus production and viral expression using serum-free conditions. Store cells and virus stocks in liquid nitrogen for long-term preservation and stability.
Area of Science:
- Biotechnology
- Cell Biology
- Virology
Background:
- Healthy insect cell cultures are fundamental for various biotechnological applications, including baculovirus expression systems, recombinant protein production, and adeno-associated virus (AAV) vector generation.
- Maintaining optimal cell health and viability is crucial for reproducible experimental outcomes and the successful scale-up of viral production.
Purpose of the Study:
- To provide detailed methods for the maintenance and expansion of insect cell cultures under serum-free conditions.
- To describe the expansion of baculovirus stocks from a single plaque-purified virus.
- To outline strategies for long-term storage of insect cells and virus stocks.
Main Methods:
- Insect cell culture maintenance in shake flasks utilizing serum-free media.
- Expansion of baculovirus stocks originating from a single plaque-purified virus.
- Cryopreservation of early-passage cells and virus stocks in liquid nitrogen.
Main Results:
- Established protocols for serum-free insect cell culture maintenance and virus stock expansion.
- Demonstrated the importance of limiting cell passages (e.g., to 50 passages) to mitigate cellular changes.
- Highlighted the instability of baculovirus stocks in serum-free media at 4-8°C and proposed liquid nitrogen storage as a solution.
Conclusions:
- Serum-free insect cell culture methods are essential for reliable baculovirus production and viral vector expression.
- Long-term storage of insect cells and baculovirus stocks in liquid nitrogen ensures genetic stability and preserves stock viability.
- Adherence to passage limits and proper storage conditions are critical for maintaining the integrity of cell cultures and viral stocks.
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