Virus-like particle purification chromatography
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Solution Overview
Problem
Current methods for purifying Norovirus and Sapovirus virus-like particles (VLPs) are not scalable for commercial production, limiting the availability of high-purity VLPs needed for pharmaceutical applications.
Innovation Solution
Development of chromatographic methods using multiple chromatographic steps and materials with orthogonal properties to selectively retain or pass through VLPs and contaminants, achieving high purity levels suitable for pharmaceutical-grade VLPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current purification methods are used, then VLPs can be obtained, but the purity is insufficient and the methods are not scalable for commercial production
Solution Approach 1:
The purification process is divided into multiple sequential chromatographic steps, each targeting specific contaminants. The method segments the purification task into: (1) initial clarification, (2) affinity chromatography for VLP capture, (3) ion-exchange chromatography for contaminant removal, and (4) size-exclusion chromatography for final polishing. This segmentation enables both high purity (>99%) and scalability for commercial production.
Solution Approach 2:
The chromatographic system employs multi-functional resin materials that can perform multiple purification functions simultaneously. For example, certain affinity resins capture VLPs while also removing specific protein contaminants, and ion-exchange resins can handle both viral particle purification and endotoxin removal in a single step, enhancing both purity and productivity.
2Manufacturing precision
If multiple chromatographic steps are implemented, then VLP purity increases to >99%, but the process complexity increases
Solution Approach 1:
Multiple chromatographic functions are merged into integrated purification modules. For instance, the system combines affinity capture and initial purification in one chromatographic column, then uses a second column for ion-exchange purification, and a third for size-exclusion polishing. This merging approach achieves >99% purity while managing complexity through modular design that can be scaled and automated.
Solution Approach 2:
The chromatographic process utilizes systematic parameter changes across different steps to simplify operation. Each chromatographic step operates at optimized pH, ionic strength, and flow rate conditions specific to the contaminant being removed. Affinity chromatography uses specific ligand binding conditions, ion-exchange uses gradient elution, and size-exclusion uses controlled flow rates, making the complex multi-step process manageable through standardized parameter protocols.
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
The chromatographic process achieves VLPs with purity greater than 99% and reduces contaminant levels to meet regulatory standards, enabling large-scale commercial production of purified VLPs.
Implementation Method 1
contacting the solution with a chromatographic material wherein the chromatographic material retains the virus-like particles
Data Source
AI summary
Methods for purifying human Calciviruses are disclosed, including Noroviruses and Sapoviruses.