Magnetic Bead Extracellular Vesicle Isolation Without Centrifugation
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Solution Overview
Problem
Existing methods for isolating exosomes and microvesicles are slow, tedious, subject to variability, and not suitable for scalability or automation, relying on centrifugation and other techniques that are inefficient and labor-intensive.
Innovation Solution
A method involving incubation of biological samples with particles that bind to surface markers, followed by contact with a high-density matrix and application of a magnetic or other force to translocate particle-microvesicle complexes, allowing for high-throughput isolation without centrifugation or washing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ultracentrifugation is used to isolate microvesicles, then isolation precision is improved, but productivity deteriorates and loss of time worsens
Solution Approach 1:
The patent replaces the mechanical ultracentrifugation system with a magnetic field-based separation system. Magnetic particles conjugated to antibodies bind to microvesicles, and a magnetic field is applied to separate the bound complexes from the sample, eliminating the need for high-speed centrifugation while maintaining isolation precision and enabling high-throughput processing
Solution Approach 2:
The patent introduces magnetic particles conjugated to antibodies as an intermediary between the microvesicles and the magnetic field. These particles serve as mediators that specifically bind to microvesicle surface markers and enable magnetic separation, replacing the direct mechanical force of ultracentrifugation with a targeted magnetic interaction
2Manufacturing precision
If differential centrifugation is used to isolate microvesicles, then isolation precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent segments the complex multi-step centrifugation process into a single magnetic separation step. By using magnetic particles conjugated to specific antibodies, the method isolates microvesicles in one operation without requiring sequential centrifugation at different speeds, significantly simplifying the procedure while maintaining precision
Solution Approach 2:
The patent replaces the complex mechanical centrifugation sequence with a simpler magnetic field-based separation. The magnetic particles bound to microvesicles are easily separated by applying a magnetic field, eliminating the need for multiple centrifugation steps and making the procedure much easier to perform
3Manufacturing precision
If existing isolation methods are used, then isolation precision is improved, but adaptability deteriorates
Solution Approach 1:
The patent creates a universal magnetic separation platform that can isolate different types of microvesicles by simply changing the antibody conjugated to the magnetic particles. This single platform method works for various biofluids and target populations, enabling both high precision and easy adaptation to different research and diagnostic needs
Solution Approach 2:
The patent enables adaptability by allowing changes in the antibody type, magnetic particle size, and magnetic field strength parameters. These parameter adjustments permit the same basic method to be optimized for different microvesicle populations and sample types, providing both precision and versatility
4Manufacturing precision
If ultracentrifugation is used to isolate microvesicles, then isolation precision is improved, but loss of time worsens
Solution Approach 1:
The patent replaces time-consuming ultracentrifugation with rapid magnetic separation. Magnetic particles bound to microvesicles are quickly separated by applying a magnetic field, reducing the isolation time from hours to minutes while maintaining high precision through specific antibody-microvesicle binding
Solution Approach 2:
The patent performs preliminary binding of magnetic particles to microvesicles before separation. This pre-complex formation during incubation allows the actual separation step to be performed rapidly by magnetic field application, reducing the critical separation time while ensuring specific binding has already occurred
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
Enables efficient, scalable, and automatable isolation of microvesicles from multiple samples, facilitating the extraction of nucleic acids and proteins for diagnostic purposes.
Implementation Method 1
subjecting the at least one biological sample and the at least one high-density matrix to a magnetic field such that the at least one magnetic particle-microvesicle complex is translocated through the high-density matrix
Data Source
AI summary
The present disclosure relates to compositions, methods and kits for the isolation of extracellular vesicles. The compositions, methods and kits can comprise a high-density liquid reagent that facilitates the sequestration of extracellular vesicles bound to magnetic beads.