Hydrophobic Chromatography Carrier for Antibody Dimer Removal
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Solution Overview
Problem
Existing hydrophobic interaction chromatography (HIC) methods struggle to effectively remove dimeric antibodies while recovering the antibody solution, lacking a chromatography carrier that excels in this capability.
Innovation Solution
A chromatography carrier is developed by adding a hydrophobic group to a base carrier containing porous particles, specifically crosslinked cellulose, with an electric conductivity of 34 mS/cm or less, which includes ligands such as phenyl, n-butyl, n-hexyl, and n-octyl, and is used in a flow-through mode to purify antibodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a HIC carrier with high hydrophobic interaction capability is used, then the removal of dimeric antibodies is improved, but the recovery of antibody solution deteriorates
Solution Approach 1:
The patent changes the electric conductivity parameter of the HIC carrier to 34 mS/cm or less, which optimizes the balance between dimer removal capability and antibody recovery. This parameter adjustment modifies the interaction strength between the carrier and antibodies, enabling selective dimer removal while preserving monomer recovery.
Solution Approach 2:
The patent uses a composite HIC carrier structure combining porous particles with specific hydrophobic ligands (phenyl, n-butyl, n-hexyl, or n-octyl) bound to the carrier surface. This composite structure provides both the hydrophobic interaction needed for dimer removal and the controlled conductivity for maintaining antibody recovery.
2Manufacturing precision
If kosmotropic salt with high concentration is used to promote hydrophobic interaction, then the separation capability is improved, but the process complexity and conditions deteriorate
Solution Approach 1:
The patent extracts the salt dependency from the HIC process by using a carrier with inherently controlled electric conductivity (34 mS/cm or less). This allows the system to achieve effective dimer removal through the carrier's intrinsic properties rather than requiring external kosmotropic salts, thereby simplifying the process conditions.
Solution Approach 2:
The HIC carrier is designed to self-regulate the hydrophobic interaction strength through its controlled electric conductivity. The carrier automatically provides the necessary interaction conditions for dimer removal without requiring external salt concentration adjustments, making the process more straightforward.
3Ease of operation
If a HIC method in flow-through mode under unsalted condition is used, then the process simplicity is improved, but the dimer removal capability deteriorates
Solution Approach 1:
The patent changes the key parameter of electric conductivity to 34 mS/cm or less, which enables effective dimer removal even under unsalted flow-through conditions. This parameter optimization allows the system to maintain high dimer removal capability while preserving the simplicity of the flow-through mode operation.
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 carrier effectively removes dimeric antibodies, allowing for the recovery of a high-quality antibody solution, particularly suitable for monoclonal and polyclonal antibodies, including human antibodies.
Implementation Method 1
hydrophobic interaction chromatography utilizing a hydrophobic interaction
Implementation Method 2
a chromatography carrier obtained by adding a hydrophobic group to a base carrier containing porous particles
Data Source
AI summary
A chromatography carrier capable of removing an antibody dimer from a solution containing an antibody monomer. The chromatography carrier includes a base carrier containing porous particles and a hydrophobic ligand bound to the base carrier, and has an electric conductivity of 34 mS/cm or less measured by a gradient elution test. The porous particles preferably have an average particle diameter of 66 to 150 μm, and the hydrophobic ligand preferably has at least one selected from a group consisting of phenyl, n-butyl, n-hexyl, n-octyl, and n-octadecyl.