Efficient Manufacturing of Complex Biopharmaceuticals using Membrane Chromatography

Research from the Technical University in Germany has demonstrated the efficient manufacturing of complex biopharmaceuticals using innovative downstream processing strategies, specifically membrane chromatography. This approach enables high-throughput separations at elevated flow rates, offering a promising alternative to resin-based systems. The study focuses on the Natrix CH membrane, a novel mixed-mode membrane integrating ion-exchange and hydrophobic interaction functionalities, and evaluates its performance in bind-and-elute mode for separating monoclonal antibody charge variants.

Key Takeaways:

• The Natrix CH membrane showed enhanced selectivity in separating charge variants, with better separation and increased retention up to one pH unit, attributed to its additional hydrophobic ligand.
• Linear gradient elution experiments enabled calibration of a stoichiometric displacement model under low-loading conditions, while high-loading experiments up to 35 mg mL-1 refined a steric mass action model using a reverse fitting procedure.
• Mechanistic in silico modeling enabled accurate prediction, optimization, and successful scale-up of charge variant separation on Natrix CH membranes.
• The approach demonstrated good applicability and scalability within the calibrated range, advancing membrane chromatography as a high-throughput alternative for efficient protein purification.
• Financial support for this research came from Projekt DEAL.
• The research was peer-reviewed and published in the Journal of Chemical Technology & Biotechnology.

Statistics:

• Up to 35 mg mL-1 loadings were tested in high-loading experiments to refine a steric mass action model.
• The dynamic binding capacity (DBC10%) decreased by 7% when scaling up from laboratory to bench-scale membrane devices.
• The membrane device was tested at elevated flow rates of up to 10 membrane volumes per minute.
• The Natrix CH membrane was used in bind-and-elute mode for separating monoclonal antibody charge variants.
• The research included a sensory analysis of the performance of the Natrix CH membrane.

Sources:

• Mixed-mode Membrane Chromatography: Mechanistic-modeling-based Optimization and Scale-up of Antibody Charge Variant Separation Using a Novel Membrane Adsorber. Journal of Chemical Technology & Biotechnology, 2025.
• NewsRx. Reports Summarize Immunoglobulins Findings from Technical University (Mixed-mode Membrane Chromatography: Mechanistic-modeling-based Optimization and Scale-up of Antibody Charge Variant Separation Using a Novel Membrane Adsorber). Life Science Weekly. October 21, 2025; p 4437.