Sulphate Ligand Separation Matrix for Influenza Purification
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Solution Overview
Problem
Current methods for virus purification, particularly for influenza virus, are not optimized for efficient separation from nucleic acids and other contaminants, leading to a need for improved purification techniques.
Innovation Solution
A separation matrix is developed by attaching sulphate ligands to extenders, which are then coupled to an insoluble carrier, providing a flexible and hydrophilic matrix for effective virus separation. This matrix is specifically designed to separate viruses from DNA and other contaminants in biological fluids, using a combination of dextran and agarose as key components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional ion exchange chromatography is used for virus purification, then virus can be separated from cell proteins and DNA, but the separation efficiency is insufficient and co-elution of contaminants occurs
Solution Approach 1:
The patent applies local quality by creating a matrix with non-uniform charge distribution through the combination of charged ligands (anionic or cationic) with hydrophilic polymers. This localized charge property at specific binding sites enables selective interaction with viral particles while allowing contaminants to pass through, thereby improving separation efficiency and reducing co-elution of contaminants.
Solution Approach 2:
The invention uses composite materials by combining charged ligands with hydrophilic polymers (such as dextran or agarose) to create a new matrix material. This composite structure provides both the charge necessary for ion exchange and the hydrophilic properties that enhance virus binding, resulting in improved purification performance compared to conventional single-material matrices.
2Manufacturing precision
If multiple chromatography steps are used to improve purification quality, then virus purity increases, but the process complexity and time increase
Solution Approach 1:
The patent achieves multi-functionality by designing a single chromatography matrix that can perform multiple separation functions simultaneously. The matrix is engineered to interact with different types of contaminants (proteins, DNA, endotoxins) through various mechanisms including ion exchange, hydrophobic interactions, and size exclusion, allowing one step to replace multiple conventional purification steps.
Solution Approach 2:
The invention merges multiple purification mechanisms into a single integrated matrix system. By combining charged ligands with hydrophilic polymers in one matrix, the patent consolidates what would traditionally require separate ion exchange and size exclusion chromatography steps into a single operation, reducing process complexity while maintaining high virus purity.
3Ease of operation
If traditional matrices are used for virus separation, then the process is simple to operate, but the separation performance is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical and physical properties of the chromatography matrix. The ligands are attached with specific charge characteristics and the hydrophilic polymers are selected with particular molecular weights and structures. These parameter optimizations enable the matrix to achieve superior separation performance while maintaining ease of operation through standard chromatography procedures.
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 matrix effectively separates viruses from nucleic acids and other contaminants, demonstrating comparable or improved performance to existing commercial products, with specific embodiments showing effective retardation and elution of influenza virus while minimizing co-elution of DNA, thus enhancing the purification process.
Implementation Method 1
The matrix effectively separates viruses from nucleic acids and other contaminants, demonstrating comparable or improved performance to existing commercial products
Implementation Method 2
a separation matrix comprised of at least one insoluble carrier to which sulphate ligands have been attached via extenders
Data Source
AI summary
The present invention relates to a method of preparing a separation matrix comprising at least one insoluble carrier to which sulphate ligands have been attached via extenders, which method comprises coupling, in a first step, of the sulphate ligands to the extenders and, in a subsequent step, attaching the extenders to an insoluble carrier. The invention also relates to a separation matrix comprised of at least one insoluble carrier to which sulphate ligands have been attached via extenders. Advantageously, no sulphate ligands are directly attached to the insoluble carrier. The extenders may be natural polymers, such as dextran, and the insoluble carrier may be made from natural polymers, such as agarose, or synthetic polymers. The invention also relates to a method of purifying virus, such as influenza virus, using a separation matrix according to the invention.