Agarose-Filled Ceramic Apatite for Biomolecule Purification
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Solution Overview
Problem
Current methods for purifying viruses, proteins conjugated to large particles, and other large biomolecules are limited by the need for expensive resins, low flow rates, and limited sample loads in size exclusion chromatography, and have limited selectivity in ion exchange and hydrophobic interaction chromatography, while centrifugation is only applicable to dense biomolecules.
Innovation Solution
A ceramic apatite bead filled with agarose is used, which maintains selectivity and binding capacity by allowing target molecules to interact with ceramic apatite via its pores, while the agarose does not significantly interfere with this interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If size exclusion chromatography is used for purification, then separation of large biomolecules from smaller impurities is achieved, but expensive resins are required and flow rates are limited
Solution Approach 1:
The patent combines ceramic apatite beads with agarose polymer to create a composite chromatography medium. The ceramic apatite provides structural stability and selectivity for large biomolecules, while the agarose filling modifies pore properties to enhance size exclusion effects. This composite structure eliminates the need for expensive specialized resins while maintaining effective purification of large biomolecules from smaller impurities.
Solution Approach 2:
The patent utilizes the porous structure of ceramic apatite beads, filling the pores with agarose polymer. The porous material allows size-based separation where larger biomolecules are excluded from pores while smaller impurities enter and are retained. This porous mechanism provides effective purification without requiring complex column configurations or expensive resins.
2Reliability
If ion exchange chromatography or hydrophobic interaction chromatography is used, then purification is achieved, but selectivity is limited
Solution Approach 1:
The patent applies local quality by creating regions with different properties within the chromatography bead. The ceramic apatite exterior provides one type of interaction while the agarose-filled pores provide size exclusion properties. This spatial differentiation of functional properties enables high selectivity for large biomolecules, distinguishing them from smaller impurities through combined mechanisms rather than relying on limited selectivity of single-mode chromatography.
3Reliability
If centrifugation is used for separation, then large dense biomolecules can be separated, but it is not applicable to less dense biomolecules
Solution Approach 1:
The patent creates a universal purification medium that handles diverse biomolecules through multiple mechanisms. The ceramic apatite-agarose composite provides both size exclusion and selective binding capabilities, making it applicable to viruses, protein-nanoparticle conjugates, and other large biomolecules regardless of their density. This multi-functional approach replaces density-dependent centrifugation with a versatile chromatography system.
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 agarose-filled ceramic apatite effectively separates and purifies target molecules, such as protein-nanoparticle conjugates, by excluding contaminants and maintaining the selectivity and binding capacity of the ceramic apatite, even under varying conditions.
Implementation Method 1
incubating ceramic apatite in an agarose solution heated to a temperature from about 60°C to about 100 °C
Implementation Method 2
cooling the heated agarose solution having ceramic apatite to between about 4 °C to about 30 °C to form an insoluble porous agarose gel within the pores of the ceramic apatite
Implementation Method 3
cooling the heated agarose solution having ceramic apatite to between about 4 °C to about 30 °C to form an insoluble porous agarose gel within the pores of the ceramic apatite
Implementation Method 4
The agarose-filled ceramic apatite effectively separates and purifies target molecules, such as protein-nanoparticle conjugates, by excluding contaminants and maintaining the selectivity and binding capacity of the ceramic apatite
Data Source
Figure 1
AI summary
Polymer-filled ceramic apatites and their uses are provided.