Fc-Tagged Extracellular Vesicles for High-Purity Affinity Isolation
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Solution Overview
Problem
Current methods for isolating extracellular vesicles suffer from low purity and efficiency, requiring labor-intensive and costly processes.
Innovation Solution
The use of a fusion protein comprising an extracellular vesicle membrane protein and an immunoglobulin Fc region or variant thereof, allowing for high-purity isolation through affinity chromatography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current isolation methods (ultracentrifugation, density gradient centrifugation, etc.) are used, then extracellular vesicles can be isolated, but the purity and isolation efficiency are relatively low and the process is labor-intensive
Solution Approach 1:
The patent introduces a fusion protein comprising an extracellular vesicle membrane protein and an immunoglobulin Fc region as an intermediary. This fusion protein enables specific binding between extracellular vesicles and protein ligands (such as Protein A or Protein G) through the Fc region, allowing for high-purity isolation via affinity chromatography while significantly improving isolation efficiency and reducing labor requirements
Solution Approach 2:
The patent creates a composite structure by fusing the extracellular vesicle membrane protein with the immunoglobulin Fc region. This composite fusion protein combines the properties of both components: the membrane protein ensures specific association with extracellular vesicles while the Fc region provides high-affinity binding to protein ligands, enabling efficient and pure isolation
2Quantity of substance
If current isolation methods are used, then extracellular vesicles can be isolated, but significant time and cost are required
Solution Approach 1:
The fusion protein acts as a mediator that enables rapid and specific capture of extracellular vesicles through affinity chromatography. The protein ligand-bound matrix selectively binds extracellular vesicles expressing the Fc-fused membrane protein, allowing for fast isolation in a single step without the time-consuming sequential processes of traditional methods
Solution Approach 2:
The patent changes the surface properties of extracellular vesicles by introducing the Fc region, which fundamentally alters their isolation characteristics. This modification enables the use of affinity-based isolation parameters (specific binding to protein ligands) rather than physical separation parameters (centrifugal force, density gradients), dramatically reducing isolation time
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
Extracellular vesicles are isolated with high purity and efficiency using affinity chromatography, facilitating their application in disease diagnosis and treatment.
Implementation Method 1
the affinity of the Fc region with a protein ligand
Data Source
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AI summary
The present invention relates to recombinant extracellular vesicles comprising an immunoglobulin Fc region or a variant thereof, and a method for isolating extracellular vesicles using the same. By utilizing the affinity between the immunoglobulin Fc region and specific protein ligands, extracellular vesicles can be isolated with high purity and efficiency. The extracellular vesicles can be isolated with high purity by the simple and straightforward method affinity chromatography, and thus is highly apt to be advantageously applicable in the diagnosis and treatment of various diseases.