Protein loss during membrane processes in biopharmaceutical manufacturing

Area of Science:

• Biopharmaceutical Manufacturing
• Separation Science
• Process Engineering

Background:

• Maximizing product yield is crucial for cost-effectiveness in high-value biopharmaceutical production.
• Protein adsorption and fouling during membrane filtration lead to significant, yet under-quantified, yield losses.
• Downstream processing involves multiple membrane filtration steps, each contributing to potential protein loss.

Purpose of the Study:

• To comprehensively analyze and quantify protein losses across various membrane filtration systems used in biopharmaceutical downstream processing.
• To investigate the influence of protein type, concentration, throughput, and membrane properties on protein loss.
• To establish a methodology for assessing protein yield loss in bioprocesses.

Main Methods:

• Utilized three model proteins (bovine serum albumin, human serum albumin, immunoglobulin G) with commercially available membranes.
• Evaluated protein loss across clarification, virus removal, ultrafiltration/diafiltration, and sterile filtration stages.
• Correlated protein loss with parameters including protein characteristics, process conditions, and membrane morphology.

Main Results:

• Demonstrated significant protein loss attributable to adsorption and fouling across different membrane filtration steps.
• Identified distinct protein loss patterns influenced by protein type (e.g., albumin vs. IgG) and membrane pore size/material.
• Established correlations between protein loss and factors such as protein concentration, transmembrane pressure, and total throughput.

Conclusions:

• Protein loss during membrane filtration is a critical factor affecting overall biopharmaceutical yield and manufacturing economics.
• Understanding and quantifying these losses through systematic analysis is essential for process optimization.
• The developed methodology provides a framework for assessing and mitigating protein yield loss in bioprocess development.