Chromatography Medium Sanitization and Regeneration for Resin Life
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Solution Overview
Problem
Existing chromatography-based methods for protein purification face high costs due to the need for large volumes of chromatography media, and harsh sanitization and regeneration methods degrade sensitive protein ligands, reducing resin lifetime and effectiveness.
Innovation Solution
A method using an alkaline detergent, such as CIP-100, in combination with ethanol and sodium hydroxide, is employed to sanitize and regenerate chromatography media, maintaining ligand integrity and extending resin life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If harsh sanitization methods (high NaOH concentrations) are used to sanitize chromatography medium, then sanitization effectiveness is improved, but ligand stability deteriorates and resin lifetime is reduced
Solution Approach 1:
The patent changes the chemical parameters of the sanitization solution by using lower concentrations of sodium hydroxide (e.g., 0.1-10% w/v instead of conventional high concentrations) and adjusting pH levels (e.g., pH 7-9 instead of highly alkaline conditions). This parameter modification allows effective pathogen inactivation while preventing ligand degradation and maintaining resin stability for multiple reuse cycles
Solution Approach 2:
The patent introduces intermediary substances such as enzymes (proteases, lipases, amylases) and chelating agents (EDTA, DTPA) that act as mediators to enhance sanitization effectiveness and regeneration capability without requiring harsh conditions. These intermediaries facilitate the removal of contaminants and maintenance of ligand function under milder conditions
2Productivity
If conventional regeneration methods are used to remove bound proteins, then regeneration capability is improved, but ligand binding activity deteriorates
Solution Approach 1:
The patent modifies regeneration parameters by using lower concentrations of harsh chemicals and implementing controlled pH cycles. The regeneration process uses milder conditions (e.g., pH 7-9, lower salt concentrations) that effectively remove bound proteins while preserving ligand binding activity, allowing multiple purification cycles without significant loss of performance
Solution Approach 2:
The patent implements a continuous regeneration protocol that maintains ligand functionality throughout the process. By using enzyme treatments and controlled chemical exposure, the system continuously removes contaminants while preserving binding activity, enabling the resin to be reused for multiple cycles (e.g., 50-100 cycles) without significant degradation
3Ease of manufacture
If chromatography media are re-used to reduce costs, then cost effectiveness is improved, but contamination risk increases
Solution Approach 1:
The patent employs enzymatic intermediaries (proteases, lipases, amylases) and chelating agents as mediators that actively eliminate biological contaminants and maintain sanitization during resin reuse. These intermediaries provide continuous protection against contamination while allowing multiple purification cycles, making the process both cost-effective and safe for therapeutic protein production
Solution Approach 2:
The patent implements self-sanitizing and self-regenerating capabilities through the chromatography medium itself. The resin is designed to undergo automated regeneration cycles using milder conditions that maintain its own functionality while removing contaminants. This self-service approach reduces the need for harsh external treatments and enables safe, repeated use without significant contamination risk
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 allows for multiple cycles of use, reducing costs per use and preserving the chromatography medium's ability to purify proteins effectively.
Implementation Method 1
contacting the medium with an alkaline detergent... able to adequately inactivate and clear pathogens from the chromatography medium
Implementation Method 2
a combination of ethanol and sodium hydroxide was the most effective for removing residual bound proteins from the medium
Data Source
AI summary
The present disclosure relates to methods of sanitizing a chromatography medium. The present disclosure also relates to regenerating the chromatography medium.