Cellular Avidity Force Selection for Specific Binding Detection
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Solution Overview
Problem
Existing methods struggle to differentiate between specific and background binding of cells in cellular avidity studies, leading to confounded assessments and inefficient selection of candidate effector cells.
Innovation Solution
Applying varying forces to cells of interest and control cells interacting with target cells for defined periods to differentiate between specific and background binding, thereby increasing the window between positive and negative binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If target cells are attached to a surface for binding studies, then cell interaction and avidity measurement are enabled, but background binding of control cells increases and specific binding becomes difficult to differentiate
Solution Approach 1:
The patent applies varying forces to cells of interest and control cells during binding studies. By changing the force parameter, the method enhances the differentiation between specific binding (which withstands higher forces) and background binding (which detaches at lower forces), thereby improving measurement precision while addressing the background binding issue
Solution Approach 2:
The patent uses a force ramp approach where force is gradually increased to exceed the binding strength of background interactions while maintaining specific bindings. This partial application of force (not immediately applying maximum force) allows selective detachment of background-bound cells while preserving specifically-bound cells for analysis
2Reliability
If control cells are tested under the same binding conditions, then background binding can be measured, but the window between positive and negative binding decreases making differentiation difficult
Solution Approach 1:
By implementing varying force levels during the binding assay, the patent recovers the lost information window. The force parameter modulation creates distinct detachment thresholds that clearly separate positive (specific binding) from negative (background binding) results, restoring the discriminatory power needed for reliable cellular avidity assessment
3Ease of operation
If a single force is applied to determine cellular avidity, then the assay is simple to perform, but the ability to differentiate between specific and background binding is reduced
Solution Approach 1:
The force ramp methodology implements a systematic progression from low to high force, allowing the assay to remain operationally simple while progressively revealing binding characteristics. This staged application of force maintains ease of operation through automated protocols while progressively differentiating between binding types based on their force resistance thresholds
Data Source
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AI summary
The current invention relates to cell-cell interaction and in particular to cellular avidity. Provided are improved means and methods to study cell - cell interaction and characterizing cellular avidity. Varying forces were applied to cells of interest, that have interacted with target cells, was shown to have an effect on background binding. Hence, varying applied forces allows for the selection of optimal applied forces which is advantageous in means and methods relying on cellular avidity.