Antigen-Specific Lymphocyte Isolation via Magnetic Sorting and Sequencing
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Solution Overview
Problem
Current methods are inadequate for efficiently retrieving and sequencing antigen-specific lymphocytes, such as B and T cells, which are crucial for determining immune responses to therapies or predicting vaccine efficacy, as they lack effective techniques for isolating and analyzing these cells and their receptors from various biological samples.
Innovation Solution
A method involving sequential density fractionation, magnetic-activated cell sorting, and microfluidic devices to isolate and sequence lymphocyte receptors, including B and T cells, by stimulating and re-stimulating immune cells with antigens, using fluorescent probes for imaging and sorting, and subsequent sequencing to generate monoclonal antibodies or modified cells expressing the same receptors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to retrieve and sequence antigen-specific lymphocytes, then the process is simple, but the efficiency and precision of isolating and analyzing these cells is inadequate
Solution Approach 1:
The patent segments the complex isolation process into multiple distinct steps: density gradient centrifugation to separate lymphocytes from other blood cells, magnetic-activated cell sorting to enrich antigen-specific cells, and sequencing to identify receptors. This segmentation transforms an inadequate single-step process into an efficient multi-step workflow, directly addressing the productivity issue while making the complexity manageable through systematic organization.
Solution Approach 2:
The patent applies preliminary action by performing density gradient centrifugation and magnetic enrichment before the actual sequencing step. These preparatory actions pre-concentrate and purify the target antigen-specific lymphocytes, ensuring that when sequencing occurs, the cells are already optimized for analysis. This preliminary preparation significantly improves sequencing efficiency and accuracy.
2Measurement precision
If advanced techniques like sequential density fractionation and magnetic-activated cell sorting are used, then the precision of isolating antigen-specific lymphocytes is improved, but the device and process complexity increases
Solution Approach 1:
The patent employs magnetic-activated cell sorting beads that can be used across different antigen-specific lymphocyte isolation applications. These magnetic beads serve multiple functions: they can be conjugated to various antibodies targeting different antigens, they work with standard magnetic separation equipment, and they can be applied to different blood sample types. This universality improves precision across multiple applications while avoiding the need for completely different complex devices for each isolation task.
Solution Approach 2:
The patent uses magnetic beads as an intermediary between the antigen-specific lymphocytes and the magnetic separation equipment. These beads bind to the target cells and serve as a mediator that enables precise isolation without requiring direct complex interaction between the equipment and the cells. This intermediary approach simplifies the overall device complexity while maintaining high isolation precision.
3Measurement precision
If fluorescent probes and sequential stimulation are used to identify antigen-specific cells, then the accuracy of determining immune response is improved, but the time and resource consumption increases
Solution Approach 1:
The patent applies periodic action through sequential stimulation of lymphocytes with different antigens at different time points. First, cells are stimulated with one antigen and imaged for fluorescent probe signal. Then, after a recovery period, cells are stimulated with a different antigen and imaged again. This periodic stimulation pattern allows accurate determination of antigen-specific responses by comparing signals across multiple time points, improving measurement precision while managing time consumption through structured intervals.
Solution Approach 2:
The patent uses fluorescent probes that create optical copies or signals representing the presence and activation state of antigen-specific receptors on lymphocytes. Instead of directly analyzing the physical receptors, the fluorescent probes generate detectable light signals that copy the information about receptor activation. This copying approach enables accurate measurement of immune responses through optical detection rather than requiring direct physical manipulation or lengthy biochemical analysis.
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 the retrieval and sequencing of antigen-specific lymphocytes, facilitating the development of therapeutic antibodies and predicting immune responses, thereby improving the evaluation of therapies and vaccine effectiveness.
Implementation Method 1
sequential density fractionation
Implementation Method 2
magnetic-activated cell sorting
Implementation Method 3
using fluorescent probes for imaging and sorting
Data Source
AI summary
This disclosure is directed to methods for retrieving and using at least one lymphocyte. Additionally, cell receptor sequences identified with this strategy could be used for antibody development, TCR discovery, or appropriate therapeutics development or evaluation.