Method for continuous purification of biological material using immunosorbent

Area of Science:

• Biotechnology
• Biochemical Engineering
• Immunochemistry

Background:

• Continuous purification methods are crucial for efficient biological material processing.
• Immunosorbent-based purification offers high specificity for target molecules.
• Existing batch methods can be time-consuming and labor-intensive.

Purpose of the Study:

• To develop and evaluate a novel mechanical device for continuous immunosorbent-based purification.
• To adapt an existing batch purification protocol for human placental alkaline phosphatase to a continuous system.
• To identify and address limitations in the continuous purification process.

Main Methods:

• A continuous purification system was designed using heat-sealed nylon pouches with agarose-bound antibody on a Mylar belt.
• The device featured a four-chamber sequential system for binding, dissociation, and regeneration.
• An existing batch method for human placental alkaline phosphatase purification was adapted for the continuous device.

Main Results:

• The continuous system demonstrated antigen binding and dissociation capabilities.
• A decrease in antigen binding capacity was observed compared to free immunosorbents, attributed to pouch diffusion resistance and short exposure times.
• Reduced binding capacity between successive belt passes resulted from incomplete agarose resuspension due to inefficient agitation and pouch squeezing.

Conclusions:

• The developed device offers a continuous approach to immunosorbent purification.
• Pouch design and process parameters significantly impact binding efficiency.
• Further optimization is needed to overcome limitations in diffusion, exposure time, and agarose resuspension for improved performance.