Microfluidic Chip Cell Pairing Segmentation
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Solution Overview
Problem
Current microfluidic devices for cell pairing and fusion are limited by low efficiency and throughput, requiring complex operations and fabrication, and are not suitable for scaling up to high-throughput cell pairing and fusion, particularly for clinical applications such as personalized cancer vaccines.
Innovation Solution
Development of microfluidic chips with a transparent biocompatible layer and a support layer, featuring concentric circular arrays of cell traps and support pillars, allowing for high-throughput pairing and fusion of different cell types through controlled cell pairing and fusion using electrical or chemical methods, with the ability to handle large numbers of cells efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical or electrical fusion methods are used, then cell fusion can be induced, but the overall fusion efficiency is low and lengthy subculturing is required
Solution Approach 1:
The invention divides the cell fusion process into discrete stages: cell trapping in single-cell chambers, pairing in multi-cell chambers, and fusion induction. This segmentation allows each stage to be optimized independently, improving overall efficiency and reducing time loss compared to conventional bulk fusion methods.
Solution Approach 2:
Cells are pre-trapped and pre-paired in the microfluidic chambers before fusion induction. This preliminary arrangement of cells in specific geometries ensures optimal contact and alignment, significantly improving fusion efficiency and eliminating the need for lengthy subculturing to isolate desired hybrids.
2Manufacturing precision
If manual immobilization and pairing of single cells is performed, then precise fusion partners are achieved, but the number of fused cells is low
Solution Approach 1:
The microfluidic device segments cells into individual trapping chambers, allowing precise pairing of specific cell types while maintaining the ability to process large numbers of cells in parallel across multiple chambers, thus achieving both precision and high productivity.
Solution Approach 2:
The device uses replicated trapping chamber structures that can be mass-fabricated, allowing the precise pairing mechanism to be applied to thousands of cell pairs simultaneously, thereby scaling up the number of fused cells while maintaining pairing precision.
3Reliability
If flow-through approaches with AC fields or biotin-streptavidin coatings are used, then membrane fusion efficiency is improved, but the ability to properly pair and fuse unmodified cells is lacking
Solution Approach 1:
The device relies on passive hydrodynamic forces and inherent cell properties (size, shape, density) to achieve cell trapping and pairing without requiring external modifications, AC fields, or chemical coatings. This self-service approach maintains high fusion efficiency while being fully compatible with unmodified cell types.
Solution Approach 2:
The invention replaces complex electromagnetic or chemical field-based trapping mechanisms with simple passive hydrodynamic trapping based on cell physical properties. This substitution maintains effectiveness for fusion while eliminating the need for cell modification or specialized equipment, enhancing versatility.
4Reliability
If conventional microfluidic cell pairing devices are used, then cell contact is improved, but the device complexity and fabrication complexity are high
Solution Approach 1:
The device uses simple segmented chamber structures separated by raised partitions rather than complex integrated microfluidic networks. This segmentation achieves effective cell contact and pairing while dramatically simplifying fabrication to standard photolithography and molding processes, reducing device complexity.
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
The microfluidic system enables efficient and specific cell fusion with high throughput, facilitating the generation of specific hybrid cell phenotypes, significantly improving cell pairing and fusion efficiency compared to conventional methods, and is suitable for clinical applications like cancer immunotherapy and hybridoma production.
Implementation Method 1
electrical or chemical methods, with the ability to handle large numbers of cells efficiently
Implementation Method 2
electrical or chemical methods, with the ability to handle large numbers of cells efficiently
Implementation Method 3
chemical methods, with the ability to handle large numbers of cells efficiently
Data Source
AI summary
Microfluidic chips, systems, and methods of making and using thereof are described. The microfluid chip includes a disc-shaped transparent layer containing a plurality of cell traps, pillars, and filers, and a support layer attached thereto. The microfluid chip has at least one inlet port in center of the transparent layer for receiving a sample of liquid and cells, and optionally a plastic cover. The microfluid chip can be designed to be suitable for the forces used for cell pairing/fusion in stationary and spinning format, or suitable for a particular cell fusion method such chemical and electrical methods. The microfluid chip is particularly suited for fusing dendritic cells and tumor cells for immunotherapy, or for generating hybridoma.