Sanitization of Affinity Chromatography Matrices Using Peracetic Acid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for sanitizing affinity chromatography matrices with proteinaceous ligands are ineffective in killing microorganisms and spores without damaging the ligands, posing a challenge in maintaining matrix functionality and product quality.
Innovation Solution
A sanitization method using an oxidant solution, specifically a mixture of peracetic acid and formic acid, is applied to affinity chromatography matrices with oxidation-tolerant proteinaceous ligands, effectively reducing bacterial and spore contamination while preserving the binding capacity of the ligands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sodium hydroxide or acidic solutions are used for sanitization, then microorganisms and spores are inactivated, but the proteinaceous ligands are damaged
Solution Approach 1:
The patent changes the chemical parameters of the sanitization solution by using peracetic acid at controlled concentrations (0.01-1.0 M) and pH levels (2-12), which provides effective microorganism inactivation while maintaining ligand stability through optimized chemical conditions
Solution Approach 2:
The patent employs peracetic acid, a strong oxidant, as the sanitization agent which effectively kills microorganisms and spores through oxidation mechanisms while being less damaging to proteinaceous ligands compared to traditional sodium hydroxide or strong acidic solutions
2Stability of the object's composition
If peracetic acid is used for sanitization, then ligand damage is minimized, but microorganism inactivation effectiveness is reduced
Solution Approach 1:
The patent creates a composite sanitization solution combining peracetic acid with formic acid, where peracetic acid provides gentle ligand-compatible oxidation and formic acid enhances the antimicrobial effectiveness, achieving both ligand preservation and effective microorganism inactivation
Solution Approach 2:
Formic acid acts as an intermediary enhancer that boosts the antimicrobial activity of peracetic acid without significantly increasing ligand damage, allowing effective sanitization at lower peracetic acid concentrations that are gentler on ligands
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 method achieves high inactivation of bacteria and spores while maintaining at least 95% of the immunoglobulin-binding capacity of the matrix, ensuring effective sanitization without impairing the matrix's functionality.
Implementation Method 1
A sanitization method using an oxidant solution, specifically a mixture of peracetic acid and formic acid, is applied to affinity chromatography matrices with oxidation-tolerant proteinaceous ligands, effectively reducing bacterial and spore contamination
Implementation Method 2
Affinity chromatography, typically on matrices comprising staphylococcal protein A or variants thereof, is normally used as one of the key steps in the purification of intact immunoglobulin molecules. The highly selective binding of protein A to the Fc chain of immunoglobulins provides for a generic step with very high clearance of impurities and contaminants
Data Source
AI summary
The invention discloses a method for cleaning or sanitization of an affinity chromatography matrix, comprising the steps of:a) providing an affinity chromatography matrix having oxidation-tolerant proteinaceous ligands coupled to a support,b) contacting the matrix with a sanitization solution comprising at least one oxidant defined by formula I,wherein R is hydrogen or an acyl group R′—C(O)—, with R′ being a hydrogen or a methyl, ethyl or propyl group.