Enhancing Virus Filter Performance Through Pretreatment by Membrane Adsorbers.

Area of Science:

• Biopharmaceutical manufacturing
• Virus filtration technology
• Protein aggregation science

Background:

• Virus filtration is critical for biopharmaceutical production, ensuring high virus clearance.
• Flux decline in virus filtration is often caused by reversible monoclonal antibody aggregates, especially at high concentrations.
• These aggregates are difficult to detect with standard methods like size exclusion chromatography.

Purpose of the Study:

• To investigate methods for minimizing flux decline during virus filtration.
• To identify effective pretreatment strategies for disrupting reversible monoclonal antibody aggregates.
• To guide the optimization of virus filtration processes in biopharmaceutical manufacturing.

Main Methods:

• Utilized dynamic light scattering to detect reversible aggregates.
• Evaluated the efficacy of membrane adsorber pretreatment (hydrophobic interaction and ion exchange) to disrupt aggregates.
• Assessed size-based prefiltration as a method for aggregate disruption.
• Monitored flux decline during virus filtration post-pretreatment.

Main Results:

• Pretreatment with membrane adsorbers effectively minimized flux decline by disrupting reversible aggregates.
• Hydrophobic interaction membrane adsorbers proved most effective across tested pH conditions.
• Ion exchange membrane effectiveness was pH-dependent, requiring opposite charge interactions.
• Size-based prefiltration was ineffective in disrupting these aggregates.

Conclusions:

• Membrane adsorber pretreatment is a viable strategy to mitigate flux decline during monoclonal antibody virus filtration.
• Hydrophobic interaction membrane adsorbers offer a robust solution for aggregate disruption, less sensitive to pH variations.
• Understanding aggregate formation and effective disruption methods is key to enhancing biopharmaceutical production efficiency and safety.