Sulfated Polysaccharide Chromatography Medium for Virus Purification
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Solution Overview
Problem
Current chromatography media for virus purification, such as those using sulfated cellulose particles, face challenges with reduced fluidity due to sulfate group introduction, leading to decreased adsorption efficiency and requiring strain-specific culture conditions for influenza viruses, complicating vaccine production.
Innovation Solution
A chromatography medium is developed by binding sulfated polysaccharides to porous particles with an exclusion limit molecular weight of 6000 Da or less, using standard polyethylene glycol as a mobile phase, and an average particle size of 30-200 μm, which improves adsorption and fluidity, and includes cross-linking agents to enhance virus binding and purification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sulfate groups are introduced into cellulose particles to improve virus adsorption, then adsorption efficiency is improved, but fluidity is reduced
Solution Approach 1:
The patent utilizes porous particles with controlled pore structures to support sulfated polysaccharides. The porosity allows sufficient sulfate group exposure for virus adsorption while maintaining adequate fluidity through optimized pore size and distribution, resolving the contradiction between adsorption efficiency and fluidity.
Solution Approach 2:
The patent creates a composite material by binding sulfated polysaccharides to porous particle supports. This composite structure combines the high adsorption capacity of sulfated groups with the fluidity and structural integrity of the porous support matrix, achieving both improved adsorption and maintained fluidity.
2Reliability
If sulfated polysaccharides are used for virus purification, then purification efficiency is improved, but the process requires strain-specific culture conditions which complicates production
Solution Approach 1:
The patent develops a universal chromatography medium with sulfated polysaccharides that effectively purifies multiple virus strains without requiring strain-specific optimization. The medium's broad-spectrum activity eliminates the need for separate culture conditions for different influenza strains, simplifying the overall production process while maintaining high purification efficiency.
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 improved chromatography medium achieves high virus adsorption and purification efficiency, specifically for influenza virus vaccines, reducing impurity adsorption and simplifying the production process by maintaining consistent adsorption across different virus strains.
Implementation Method 1
The improved chromatography medium achieves high virus adsorption and purification efficiency
Implementation Method 2
includes cross-linking agents to enhance virus binding and purification efficiency
Data Source
AI summary
A method for preparing a chromatography medium having the properties of high virus adsorption and high fluidity, and a method for producing a virus vaccine using the chromatography medium are provided. The chromatography medium is obtained by forming a sulfated polysaccharide bound with porous particles having an exclusion limit molecular weight of 6000 Da or less when pure water is used as mobile phase and standard polyethylene glycol is used and an average particle size in the range of 30-200 μm.