Porous Glass Microwell Array for Single-Cell Processing
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Solution Overview
Problem
Current single-cell genomics methods are laborious, low throughput, and limited in processing capacity, making it challenging to analyze large numbers of single cells effectively, particularly in applications like single-cell epigenomics and quantitative PCR.
Innovation Solution
A microwell array comprising a plurality of wells etched into a porous glass substrate, allowing for vacuum actuation and independent reactor-like environments for cell isolation and sample preparation, enabling multi-step processing of thousands of single cells and facilitating single-cell qRT-PCR and digital PCR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If arrays of on-chip valves are used for cell processing, then cell isolation can be achieved, but the number of cells that can be processed is limited to up to 96 cells
Solution Approach 1:
The device divides the processing system into independent microwell reaction chambers, each capable of processing single cells in parallel. This segmentation allows thousands of cells to be processed simultaneously without requiring complex interconnections between processing units, thereby increasing productivity while maintaining manageable device complexity.
Solution Approach 2:
The microwell array platform serves multiple functions including cell isolation, lysis, and various molecular reactions (PCR, sequencing, etc.) within the same structure. This multi-functionality eliminates the need for separate specialized devices for each operation, increasing the number of cells that can be processed through a unified platform.
2Adaptability or versatility
If microfluidic droplets are used for cell processing, then high throughput can be achieved, but the system cannot address applications such as single-cell qPCR or RT-PCR
Solution Approach 1:
Each microwell is designed with specific local properties including hydrophobic coatings and controlled pore structures that enable different molecular reactions to occur within the same platform. This local customization allows the system to support diverse applications like qPCR, RT-PCR, and sequencing without requiring complex external actuation systems.
Solution Approach 2:
The microwell structure incorporates built-in features such as hydrophobic barriers and controlled pore membranes that automatically perform functions like reagent containment and waste removal without requiring external robotic manipulation. This self-service capability simplifies the device while maintaining versatility for multiple molecular applications.
3Ease of operation
If robotic based systems are used for cell processing, then automation can be achieved, but throughput and simplicity issues remain unsolved
Solution Approach 1:
The device merges cell isolation, lysis, and molecular reaction steps into a single integrated microwell platform. This consolidation eliminates the need for multiple separate robotic operations and transfer steps, thereby simplifying the workflow while maintaining high throughput through parallel processing of thousands of cells simultaneously.
4Adaptability or versatility
If existing platforms are used for cell analysis, then limited steps (1 or 2) can be performed, but applications such as single-cell epigenomics are excluded
Solution Approach 1:
The microwell array is pre-configured with hydrophobic coatings, pore structures, and reagent compartments that enable multiple processing steps to be performed sequentially within the same well. This preliminary preparation of the device structure allows complex workflows including epigenomics applications to be executed without requiring additional complex equipment or procedures.
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 simplifies the workflow, increases throughput, and allows for the analysis of a large number of single cells, addressing the limitations of existing methods by enabling efficient cell isolation, sample preparation, and molecular reaction performance at single-cell resolution.
Implementation Method 1
A microwell array comprising a plurality of wells etched into a porous glass substrate, allowing for vacuum actuation
Data Source
AI summary
The present disclosure is directed to a microwell array comprising a plurality of wells of micro-size dimensions created on porous materials. The device can be used in various cell and tissue analytical activities, and can be formed using an etching, laminating or imprinting processes.