Heparinized Microspheres for High-Purity Exosome Isolation
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Solution Overview
Problem
Existing methods for isolating and purifying exosomes from culture media or biological fluids suffer from low purity and difficulty in amplification and mass production, despite their convenience.
Innovation Solution
A heparinized microsphere is developed by cross-linking a polymer with functional groups and heparin using a cross-linking agent, which is used to isolate exosomes through a mixing process with a salt solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If differential centrifugation or size exclusion chromatography is used to isolate exosomes, then the operation is convenient and the purification procedure is fast, but the purity is low
Solution Approach 1:
The patent introduces heparinized microspheres as an intermediary substance that mediates the isolation of exosomes from culture media. The microspheres bind to exosomes through heparin-exosome interactions, enabling high-purity separation while maintaining operational simplicity. This intermediary approach resolves the contradiction by providing a bridging mechanism that achieves both ease of operation and high purification purity.
Solution Approach 2:
The patent changes the chemical parameter of the isolation system by using heparinized microspheres with specific chemical properties (heparin coating) that selectively bind to exosomes. This parameter change enables the system to achieve high purity isolation while maintaining the convenience of simple mixing and centrifugation operations, thus resolving the contradiction between operational ease and purification precision.
2Loss of time
If differential centrifugation or size exclusion chromatography is used to isolate exosomes, then the purification procedure is fast, but the difficulty in amplification and mass production remains
Solution Approach 1:
The heparinized microspheres serve as a scalable intermediary that can be produced in large quantities and used for mass production of isolated exosomes. The microspheres enable amplification of the isolation process by allowing parallel processing of multiple samples simultaneously, thus resolving the contradiction between fast purification and mass production capability.
Solution Approach 2:
The patent segments the isolation process into discrete steps involving heparinized microspheres that can be independently produced and applied. This segmentation enables the process to be scaled up for mass production by simply increasing the number of microspheres used, while maintaining the fast purification procedure, thus resolving the contradiction between speed and productivity.
3Manufacturing precision
If immunoaffinity chromatography is used to isolate exosomes, then the purity is high, but the operation complexity and cost increase
Solution Approach 1:
The patent uses heparinized microspheres as a simpler intermediary compared to immunoaffinity chromatography reagents. The microspheres achieve high isolation purity through heparin-exosome binding while requiring only simple mixing and centrifugation operations, thus resolving the contradiction between high purity and low operational complexity.
Solution Approach 2:
The heparinized microspheres function as disposable isolation agents that can be easily discarded after use, replacing the complex and expensive immunoaffinity chromatography systems. This approach achieves high purity isolation while significantly reducing operational complexity and cost, thus resolving the contradiction between manufacturing precision and device complexity.
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-purity isolation and concentration of exosomes, addressing the challenges of purity and scalability in existing techniques.
Implementation Method 1
a cross-linking agent, the polymer and the heparin cross-linked by the cross-linking agent
Implementation Method 2
mixing a solution containing a plurality of exosomes and a plurality of heparinized microspheres as claimed in claim 1 for combining the plurality of exosomes and the plurality of heparinized microspheres to obtain a plurality of exosome microspheres
Implementation Method 3
mixing a salt solution with the plurality of exosome microspheres to isolate the exosomes from the plurality of heparinized microspheres
Data Source
AI summary
A heparinized microsphere is provided, including a polymer, heparin and a cross-linking agent. The polymer has at least one functional group includes a hydroxyl group, a carboxyl group, an amine group, or a combination thereof. The polymer and the heparin are cross-linked by a cross-linking agent. A method of preparing heparinized microsphere and a method of isolating exosomes are also provided to achieve purification of exosomes with high purity.