Related Experiment Videos
Evaluation of retroviral production systems using quantitative analysis
Young Jik Kwon1, Ching-An Peng
1Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211, USA.
Biotechnology Progress
|April 5, 2003
Summary
Optimizing retroviral production requires mathematical modeling to understand viral diffusion, decay, and generation. This study determined optimal conditions for large-scale retroviral systems, finding 10% fetal bovine serum at 37°C ideal for ecotropic retrovirus production.
Area of Science:
- Biotechnology
- Bioprocess Engineering
- Virology
Background:
- Low retroviral supernatant titers necessitate optimized large-scale production systems.
- Quantitative analysis of operating conditions is crucial for maximizing retrovirus yield.
Purpose of the Study:
- To develop and validate a mathematical model for analyzing retroviral production systems.
- To determine the specific retroviral production rate constant and identify optimal operating conditions.
Main Methods:
- A mathematical model analyzing viral diffusion, decay, and generation was employed.
- Analytical solutions were fitted to experimental data from two distinct retroviral production systems.
- The impact of temperature and serum concentration on ecotropic retrovirus production was investigated.
Main Results:
- The specific retroviral production rate constant was determined for inducible and constant production systems.
- Maximum time-variant rate for VSV-G pseudotyped retrovirus was 5.7 x 10⁻³ CFU/cm²/h/cell.
- Constant rate for ecotropic retrovirus was 1.49 x 10⁻² CFU/cm²/h/cell, with optimal production at 10% FBS and 37°C.
Conclusions:
- The mathematical model effectively quantifies retroviral production capacity.
- Optimal conditions for long-term ecotropic retrovirus production were identified.
- Engineering analysis provides a framework for optimizing large-scale retroviral manufacturing.