Antithrombin Purification via Mixed Mode Chromatography
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Solution Overview
Problem
Current protein purification methods in the biopharmaceutical industry face challenges in achieving high purity and efficiency, particularly in industrial-scale production, due to the complexity of protein compositions and the need for costly ligands and extensive pretreatment processes, which can damage protein quality and require lengthy manipulation times.
Innovation Solution
A method involving the use of mixed mode chromatography carriers with ion exchange and hydrophobic interaction groups, such as Capto adhere or Capto MMC, for direct protein recovery and purification, utilizing buffers with amino acids to separate and elute proteins while maintaining desired sialic acid binding ratios and reducing impurities like neuraminidase and aggregates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If affinity chromatography using a ligand specific to the objective protein is used, then purification effectiveness is improved, but cost increases and stable supply becomes difficult
Solution Approach 1:
The patent uses Protein A as a substitute ligand that binds to antibodies rather than using a ligand specific to each objective protein. This copying approach allows the same carrier system to be used for different antibody purification needs, reducing cost and improving supply stability while maintaining purification effectiveness
Solution Approach 2:
The patent creates a universal purification system where Protein A-conjugated carriers can purify different antibody types through a single mechanism. This multi-functional approach eliminates the need for protein-specific ligands, achieving both cost reduction and consistent supply across different production scenarios
2Device complexity
If simple chromatography without affinity chromatography is used, then cost and complexity are reduced, but pretreatment time increases and protein quality may deteriorate
Solution Approach 1:
The patent performs concentration and buffer exchange as preliminary actions before chromatography, ensuring the culture supernatant is properly prepared. This preliminary treatment prevents protein deterioration during the process while enabling direct loading onto the chromatography column, reducing overall pretreatment time
Solution Approach 2:
The patent maintains continuous useful action by optimizing the workflow from concentration through buffer exchange to chromatography loading, minimizing idle time and ensuring protein quality is maintained throughout the process without unnecessary interruptions
3Manufacturing precision
If multiple chromatography steps are combined to achieve high purity, then purification quality is improved, but processing time and complexity increase
Solution Approach 1:
The patent combines concentration, buffer exchange, and chromatography purification into an integrated workflow where pretreatment and purification are merged into a continuous process. This merging achieves high purification quality while minimizing total processing time by eliminating separate handling steps
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 approach enables rapid and efficient purification of proteins like Antithrombin and Erythropoietin with high sialic acid binding ratios and low aggregate content, improving yield and quality, and reducing pretreatment time and potential protein damage.
Implementation Method 1
adsorbing the Antithrombin onto the anion exchange carrier
Implementation Method 2
washing with a buffer containing glycine to wash and remove impurities
Implementation Method 3
eluting the Antithrombin adsorbed onto the anion exchange carrier by increasing the salt concentration or conductivity of the buffer, or by varying pH of the buffer
Data Source
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AI summary
The present invention relates to protein purification. More particularly, a method for directly recovering an objective protein from a protein composition and purifying a protein with a desired quality in a rapid and efficient manner is provided. Further, a rapid purification method capable of efficiently removing impurities included in the protein composition is provided. Therefore, compared to the conventional purification methods, quality and yield of the protein can be remarkably improved.