Size-Exclusion Chromatography for Extracellular Vesicle Analysis
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Solution Overview
Problem
Current methods for analyzing extracellular vesicles, such as ultracentrifugation, are inefficient and difficult to quantify due to low yield and incomplete removal of probes, making it challenging to analyze components in limited and complex biological samples.
Innovation Solution
A method involving the use of size-exclusion chromatography to separate and detect extracellular vesicle-probe complexes, where probes specifically bind to extracellular vesicles and are then separated based on size, allowing for efficient quantification and analysis of vesicle components without prior purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultracentrifugation is used to purify extracellular vesicles, then separation can be achieved, but the yield is low and the procedure is complicated
Solution Approach 1:
The patent changes the separation parameter from density-based ultracentrifugation to size-based size-exclusion chromatography. This parameter change allows for improved yield and efficiency while maintaining separation effectiveness, as SEC operates under milder conditions without the need for high-speed rotation that limits recovery
2Reliability
If ultracentrifugation is used for purification, then extracellular vesicles can be separated, but the procedure becomes complicated with multiple steps
Solution Approach 1:
The patent extracts the essential separation function from the complex ultracentrifugation protocol and implements it through size-exclusion chromatography. This allows the separation effectiveness to be maintained while dramatically simplifying the procedure to a single chromatography step, eliminating the need for multiple centrifugation steps and density gradient preparations
3Quantity of substance
If conventional purification methods are used, then extracellular vesicles can be isolated, but probe removal is incomplete
Solution Approach 1:
The patent uses size-exclusion chromatography as an intermediary separation mechanism that physically separates extracellular vesicle-probe complexes from free probes based on size differences. This intermediary step ensures complete probe removal while maintaining extracellular vesicle isolation, as the chromatography column acts as a size-based filter that cleanly separates bound from unbound probes
4Difficulty of detecting and measuring
If probes are used to detect extracellular vesicle components, then analysis can be performed, but quantification is difficult due to incomplete probe removal
Solution Approach 1:
The patent employs size-exclusion chromatography as an intermediary separation step that resolves the detection problem. By separating extracellular vesicle-probe complexes from free probes based on size, the chromatography enables accurate quantification of bound probes, thereby improving measurement precision while maintaining the analytical capability provided by probe-based detection
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
This method enables rapid and accurate analysis of extracellular vesicles, improving diagnostic efficiency and allowing for the analysis of components and probe specificity, even in small sample volumes.
Implementation Method 1
utilizing the size-based fractionating ability of size-exclusion chromatography
Data Source
AI summary
The analysis method for extracellular vesicles, according to the present invention, uses the size-specific separation ability of size exclusion chromatography and the properties of a probe that specifically binds with extracellular vesicles, and by using same is capable of the rapid and easy analysis of the quantity of extracellular vesicles included in a sample, analysis of the physicochemical properties of the extracellular vesicles, analysis of the kind and quantity of the components included in the extracellular vesicles, and analysis of the binding properties or affinity of the probe with respect to the components of the extracellular vesicles. In addition, using the analysis method of the present invention not only enables accurate analysis of extracellular vesicles in a sample, without a sample purification or pre-processing step, but also enables accurate and simple analysis of the components of extracellular vesicles, according to the kind of probe, and thus can improve the efficiency of diagnosis using extracellular vesicles. Also, analysis of the properties or affinity of the probe can be applied to, for example, extracellular vesicle-specific antibody screening, protein screening and chemical-substance screening.