Expanded Bed Adsorption for Virus-Like Particle Capture
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Solution Overview
Problem
Current methods for purifying recombinant proteins, especially virus-like particles (VLPs), face challenges in efficiently capturing particles of interest from mixtures with high suspended solids content and varying particle sizes, particularly in plant-derived materials, leading to low yields and high costs due to clogging issues and multiple purification steps.
Innovation Solution
The use of Expanded Bed Adsorption (EBA) chromatography with a ligand-based adsorbent bed, allowing for a one-step binding and elution process, where the mixture is loaded onto an expanded bed of adsorbent with a pH between 6.0 and 8.0, enabling efficient capture of VLPs without pre-treatment, scalable for commercial levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If packed bed adsorption chromatography is used for purification, then purification efficiency is improved, but the process requires removal of whole cells or colloidal debris which is technically challenging and time-consuming
Solution Approach 1:
The expanded bed chromatography performs clarification and purification in a single step by allowing the adsorbent to process the feedstock before settling, eliminating the need for preliminary removal of cells or colloidal debris that would be required for packed bed chromatography
2Manufacturing precision
If multiple stages of purification are performed, then purification completeness is improved, but time consumption and sample loss increase
Solution Approach 1:
The expanded bed chromatography combines clarification and purification into a single integrated process step, merging multiple purification stages that would otherwise be performed separately, thereby reducing time consumption and minimizing sample loss
3Manufacturing precision
If packed bed chromatography is used, then purification capability is improved, but resin clogging occurs requiring further clarification by centrifugation or filtration
Solution Approach 1:
The expanded bed configuration performs clarification action before the feedstock reaches the settled bed, preventing resin clogging by allowing cells and colloidal debris to be processed during the expansion phase, eliminating the need for subsequent centrifugation or filtration
4Ease of operation
If expanded bed adsorption is used to reduce clarification demands, then process simplicity is improved, but the method must handle high suspended solids content effectively
Solution Approach 1:
The system dynamically transitions between expanded and settled bed states, allowing the adsorbent to adapt its configuration based on the feedstock characteristics, enabling effective handling of high suspended solids content during expansion while maintaining purification capability in the settled state
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method significantly improves the efficiency and yield of capturing VLPs, reducing costs by eliminating the need for multiple purification steps and minimizing clogging issues, while maintaining high purity and scalability for commercial production.
Implementation Method 1
loading the mixture onto the expanded bed of adsorbent to bind the virus like particles
Implementation Method 2
It uses the flow of fluid through an initially packed bed structure to achieve contact with a high fluid voidage
Data Source
AI summary
The present invention relates to a method for capturing virus-like particles of interest from a mixture comprising the use of an expanded bed of adsorbent; suitably wherein said method comprises the steps of: (a) providing an expanded bed of adsorbent; (b) contacting the mixture with the adsorbent such that the constituents of the mixture contact the expanded bed of adsorbent; (c) optionally washing the adsorbent; and (d) optionaliy e!uting the particle of interest from the adsorbent.