B Cell Enrichment via Antigen-Coated Beads for High-Throughput Antibody Generation
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Solution Overview
Problem
Current methods for generating high-throughput antibodies are limited by low efficiency and scalability, as they struggle to isolate and enrich antigen-specific B cells effectively, leading to contamination by non-specific cells and inefficient pairing of heavy and light chain antibodies.
Innovation Solution
A method involving the enrichment and activation of B cells en masse with antigens, followed by sequencing and fusion to produce hybridomas, which increases the concentration of antigen-specific cells and allows for the identification of rare antibodies by selectively stimulating memory B cells to differentiate into plasma cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If B cells are isolated using conventional panning methods, then antigen-specific B cells can be enriched, but the method produces variable results with non-specific binding that decreases cell purity
Solution Approach 1:
The patent applies preliminary action by pre-incubating B cells with antigen-coated beads before activation. This preliminary binding step ensures that only B cells with specific affinity for the antigen will bind and be subsequently activated, thereby enriching for antigen-specific cells while maintaining high purity by preventing non-specific binding during the activation phase
Solution Approach 2:
The patent uses antigen-coated beads as an intermediary medium. These beads serve as the bridge between the B cell population and the antigen, allowing specific B cells to bind and be selectively activated without direct cell-to-antigen contact that would cause non-specific binding. The beads mediate the interaction, enabling enrichment while maintaining purity
2Loss of information
If a small number of B cells are placed into each well of a multi-well plate for isolation, then heavy and light chain pairing can be determined, but the method becomes low throughput and requires extensive manual handling
Solution Approach 1:
The patent merges the functions of multiple individual wells into a single culture well. Instead of distributing B cells across many wells to track individual heavy and light chain pairing, the patent combines them in one well where B cells are activated and proliferate together, maintaining pairing information through cellular clonality while dramatically increasing throughput by eliminating the need for multi-well plate handling
Solution Approach 2:
The patent uses PCR amplification as a copying mechanism to retrieve heavy and light chain variable region genes from the activated B cell population. This allows the genetic information to be copied and sequenced without needing to physically separate or track individual cells through multiple wells, thereby maintaining information integrity while simplifying the workflow and increasing throughput
3Quantity of substance
If B cells are activated in bulk to produce plasma cells, then the number of antigen-specific cells increases, but non-specific cells may also proliferate and contaminate the population
Solution Approach 1:
The patent applies preliminary action by pre-incubating B cells with antigen-coated beads before activation. This preliminary binding step ensures that only B cells with specific affinity for the antigen will bind and be subsequently activated, thereby enriching for antigen-specific cells while maintaining high purity by preventing non-specific binding during the activation phase
Solution Approach 2:
The patent uses antigen-coated beads as an intermediary medium. These beads serve as the bridge between the B cell population and the antigen, allowing specific B cells to bind and be selectively activated without direct cell-to-antigen contact that would cause non-specific binding. The beads mediate the interaction, enabling enrichment while maintaining purity
4Quantity of substance
If conventional methods are used to isolate and enrich B cells, then the process can be performed, but it requires extensive manual handling and is difficult to scale
Solution Approach 1:
The patent merges multiple manual steps into a single automated flow cytometry-based activation process. By combining binding, washing, and activation steps into one streamlined protocol that can be automated, the patent reduces manual handling complexity while maintaining the ability to process large numbers of cells for high-throughput antibody generation
Solution Approach 2:
The patent replaces manual mechanical cell handling with automated flow cytometry-based cell activation. This substitution eliminates the need for manual cell sorting and processing, thereby reducing operational complexity and enabling easy scaling from small to large volumes of B cells for high-throughput applications
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 approach significantly enriches antigen-specific cells, increases the diversity of antibody pools, and enables the efficient identification and production of antigen-specific antibodies, overcoming the limitations of existing methods by enhancing scalability and reducing contamination.
Implementation Method 1
enriching for a population of antigen-specific B cells that comprise cell surface antibodies that are specific for the antigen by: i. contacting at least 10^5 of the cells in the sample, en masse, with the antigen or a portion thereof; and ii. isolating cells that bind to the antigen or portion thereof
Implementation Method 2
activating the enriched B cells, en masse, in the presence of the antigen or portion thereof to produce the enriched population of antigen-specific plasma cells
Data Source
AI summary
Provided herein, inter alia, is a method for producing an enriched population of antigen-specific plasma cells. In some embodiments, the method may comprise: (a) obtaining a sample of cells from an animal that has been immunized by an antigen, wherein the sample comprises B cells; (b) enriching for a population of antigen-specific B cells that comprise cell surface antibodies that are specific for the antigen by: i. contacting at least 105 of the cells in said sample, en masse, with the antigen or a portion thereof; and ii. isolating cells that bind to the antigen or portion thereof; and (c) activating the enriched B cells, en masse, in the presence of the antigen or portion thereof, to produce the enriched population of antigen-specific plasma cells.