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Purification and Visualization of Influenza A Viral Ribonucleoprotein Complexes
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A membrane-based purification process for cell culture-derived influenza A virus
Thomas Weigel1, Thomas Solomaier2, Sebastian Wehmeyer3
1Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany.
Journal of Biotechnology
|December 30, 2015
Summary
A new membrane purification process efficiently isolates influenza virus using two chromatography steps. This method achieves high virus recovery and meets strict regulatory standards for cell culture-derived vaccines.
Area of Science:
- Biotechnology
- Virology
- Downstream Processing
Background:
- Cell culture-derived viruses are crucial for vaccine production.
- Existing purification methods can be complex and costly.
- Regulatory requirements for vaccine purity are stringent.
Purpose of the Study:
- To develop a simple, efficient membrane-based purification process for cell culture-derived influenza virus.
- To achieve regulatory contamination limits using minimal unit operations.
- To establish a platform technology for virus and viral vector production.
Main Methods:
- Clarification and concentration of cell culture supernatant.
- Virus capture using a pseudo-affinity membrane adsorber (sulfated cellulose, SCMA).
- Polishing step with a salt-tolerant anion exchange membrane adsorber (STMA) for DNA removal.
Main Results:
- Achieved up to 97% virus recovery in optimization.
- Reduced residual DNA levels below 0.82% post-optimization.
- Overall influenza virus yield of 75% with protein and DNA contamination reduced to 24% and <0.5% respectively.
- Purity levels comply with European Pharmacopeia standards for cell culture-derived vaccines.
Conclusions:
- A two-step membrane purification process is effective for influenza virus.
- The process meets regulatory purity standards without buffer exchange or nuclease treatment.
- This membrane-based approach offers a generic, economic platform for virus production.
