In Situ Tetrameric Antibody Complex Formation for Cell Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for preparing tetrameric antibody complexes (TACs) require pre-forming them in an aqueous buffer before adding them to a sample, which limits their ability to selectively isolate target entities with high antigen expression and results in instability of individual antibodies, leading to reduced storage stability and purity in cell isolation processes.
Innovation Solution
A method to form bifunctional TACs directly on the surface of target entities in a sample by contacting the first target entity with a specific antibody, adding a second antibody that binds to the second target entity, and then adding a third antibody that crosslinks the first and second antibodies, thereby forming tetrameric antibody complexes in situ, allowing for selective isolation and improved stability of antibodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tetrameric antibody complexes are pre-formed in aqueous buffer before adding to sample, then the antibody complexes are stable and ready for use, but they cannot selectively isolate target entities with high antigen expression and lose storage stability
Solution Approach 1:
The patent applies preliminary action by pre-coating magnetic particles with antibodies against the first target entity before adding the sample. This allows the magnetic particles to be pre-prepared and stored stably, while the actual complex formation occurs in situ when the sample is added, enabling selective isolation of target entities with high antigen expression.
Solution Approach 2:
The patent uses magnetic particles as an intermediary carrier that first binds antibodies against the first target entity, then facilitates the formation of bifunctional TACs with antibodies against the second target entity. This intermediary approach allows stable storage of pre-coated particles while achieving high-purity isolation through in situ complex formation.
2Reliability
If individual antibodies are used for targeting, then they can bind specifically to target entities, but they are unstable and have reduced storage stability
Solution Approach 1:
The patent creates composite immunological structures by coating magnetic particles with antibodies against the first target entity, then forming bifunctional TACs that incorporate antibodies against the second target entity. This composite approach combines the stability of pre-formed coatings with the specificity of multiple antibody-target interactions, achieving both storage stability and adaptive targeting capability.
3Ease of manufacture
If tetrameric antibody complexes are pre-formed, then the process is simplified and ready-to-use, but the purity and specificity of cell isolation is reduced
Solution Approach 1:
The patent simplifies the process by pre-coating magnetic particles with antibodies, which can be done in advance and stored. When isolation is needed, the sample is simply added and the bifunctional TACs form in situ, providing both ease of manufacture and high purity isolation without requiring pre-formed complex TACs.
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 enhances the purity of isolated cells by selectively targeting high antigen-expressing cells and improves the stability of antibodies, enabling longer-term storage and more efficient cell separation with higher purity and specificity.
Implementation Method 1
contacting the first target entity with a first antibody that is specific for the first target entity wherein the first antibody binds to the first target entity in the sample
Implementation Method 2
adding a third antibody to the sample that is specific for the first and second antibodies wherein the third antibody binds to said first and second antibodies, thereby forming a tetrameric antibody complex
Data Source
AI summary
An improved method for the preparation of tetrameric antibody complexes directly on the surface of target entities in a sample is described. In particular, this method involves linking, in the sample, a first target entity with a second target entity in a sample using antibodies with specificity for the first and second target entities.