Cell-Capturing Substrate with Molecular Trigger for Label-Free Separation
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Solution Overview
Problem
Current cell separation methods face challenges in achieving high purity, high yield, and minimal biochemical and biophysical perturbation, especially when isolating rare and sensitive cells, as they often require harsh chemical or physical conditions that can damage cells.
Innovation Solution
A cell-capturing substrate with a capture ligand specific to cell surface proteins and a molecular trigger that allows for label-free, affinity-based cell capture and release, using a substrate with an effector and a spacer component like polyethylene glycol (PEG) to disrupt cell-substrate interactions without causing excessive perturbation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If harsh chemical or physical conditions are used for cell separation, then separation efficiency is improved, but cell damage and perturbation increase
Solution Approach 1:
The patent uses an affinity-based capture ligand as an intermediary between the cell and the separation system. The capture ligand specifically binds to cell surface proteins, enabling gentle, specific cell capture without harsh conditions. This mediator allows efficient separation while preserving cell integrity and minimizing perturbation.
Solution Approach 2:
The patent employs reversible parameter changes through the use of a molecular trigger that modulates the affinity between the capture ligand and cell surface protein. By changing binding parameters dynamically, the system achieves efficient capture and release without subjecting cells to harsh chemical or physical conditions, thus maintaining cell viability.
2Measurement precision
If affinity-based capture is used, then cell specificity is improved, but release conditions become harsher
Solution Approach 1:
The patent introduces dynamic control of the capture ligand-cell interaction through a molecular trigger. The system transitions from static affinity binding to dynamic, reversible binding, allowing specific cell capture followed by gentle release upon trigger addition. This dynamic approach maintains high specificity while eliminating the need for harsh release conditions.
Solution Approach 2:
The molecular trigger acts as an intermediary that displaces the capture ligand from the cell surface protein. This mediator enables specific cell release without harsh conditions, as the trigger competes with or modifies the capture ligand binding, allowing gentle cell detachment while maintaining capture specificity.
3Stability of the object's composition
If label-free affinity-based capture is used, then cell integrity is improved, but separation selectivity may decrease
Solution Approach 1:
The patent applies local quality by using capture ligands that specifically recognize and bind to particular cell surface proteins. This localized, specific binding ensures high separation selectivity while maintaining cell integrity, as the affinity-based capture targets specific molecular features rather than applying general harsh treatment to all cells.
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 method enables efficient, specific, and gentle release of captured cells with intact biochemical components, suitable for applications requiring unperturbed cells, such as cell-based therapies and stem cell studies, with high specificity and minimal perturbation.
Implementation Method 1
a capture ligand bound to the substrate, wherein the capture ligand is specific for a cell surface protein
Implementation Method 2
exposing the cell-capturing substrate to a molecular trigger, wherein the molecular trigger binds to the effector
Data Source
AI summary
A cell-capturing substrate, methods of using the cell-capturing substrate that allow for label-free cell separation, and kits that incorporate the cell-capturing substrate.