Sterilizing Aldehyde-Activated Chromatography Media
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Solution Overview
Problem
Current methods for sterilizing chromatographic separation media, especially those with pre-activated chemical groups, are cumbersome and often damage the media, requiring sterilization under sterile conditions and involving harmful chemicals or processes that are toxic or deleterious.
Innovation Solution
Exposing aldehyde-activated solid support materials, such as agarose matrices, to pressurized steam at temperatures between 121°C and 135°C for 10 to 60 minutes effectively sterilizes them without denaturation, allowing subsequent ligand coupling under aseptic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong acids or alkalis, quaternary ammonium compounds, halogen-containing compounds, oxidizing agents, and phenols are used for sterilization, then sterilization effectiveness is improved, but the chromatography media particularly proteinaceous affinity media are damaged
Solution Approach 1:
The patent changes the sterilization parameter from harsh chemical agents to physical steam heat treatment. By controlling temperature (121-135°C) and time (10-60 minutes) parameters, the method achieves sterilization without the damaging chemical effects on proteinaceous media while maintaining media integrity
Solution Approach 2:
The patent replaces chemical sterilization mechanisms with a physical steam-based thermal mechanism. The steam penetrates the media and achieves sterilization through controlled heating, substituting the chemical action of acids, alkalis, and other harsh agents with a mechanical/physical thermal process that preserves media structure
2Reliability
If gamma irradiation or autoclaving is used for sterilization, then sterilization effectiveness is improved, but large deleterious effects are caused to the media
Solution Approach 1:
The patent modifies the autoclaving parameters by using controlled temperature ranges (121-135°C) and time periods (10-60 minutes) with pressurized steam, changing the harsh sterilization parameters into controlled conditions that achieve sterilization without causing deleterious effects on the media
3Ease of manufacture
If conventional sterilization methods are used, then sterilization is achieved, but the process becomes cumbersome requiring sterilization under sterile conditions before activation
Solution Approach 1:
The patent performs sterilization after chemical activation of the solid support material, reversing the conventional sequence. By activating the material first and then sterilizing it with steam, the method eliminates the need for complex sterile handling during activation, simplifying the overall process while maintaining sterility
Solution Approach 2:
The patent utilizes the phase transition of water to steam for sterilization. The pressurized steam penetrates the activated material effectively, and the phase change provides efficient heat transfer that achieves sterilization quickly without requiring prolonged exposure times
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 method provides a sterile and stable chromatographic separation medium, enabling efficient bacterial and viral inactivation while preserving the integrity of the pre-activated solid support materials, suitable for use in biopharmaceutical purification processes.
Implementation Method 1
exposing the solid support to pressurized steam at a temperature of between 121°C and 135°C
Data Source
AI summary
The present invention relates to a method for sterilization of a chemically activated solid support material comprising exposing the solid support material to pressurized steam at a temperature of between about 121oC and about 135oC. Also provided are sterile, activated solid support material produced according to the present method, including chromatographic separation medium made thereof.