Microfluidic Culture Chamber With Deformable Membrane for 2D Cell Imaging
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Solution Overview
Problem
Existing microfluidic devices fail to maintain cells in a two-dimensional plane for long periods, provide high throughput screening, and test multiple environmental conditions while ensuring cell viability and stability, particularly for small cell types like Mycobacterium tuberculosis.
Innovation Solution
A microfluidic device with a deformable membrane structure and specific geometric ratios, allowing cells to be cultured in a two-dimensional monolayer for extended periods, enabling high-resolution, high-throughput screening under controlled conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional microfluidic devices are used for cell culture, then cell screening can be performed, but cells cannot be maintained in a two-dimensional plane for long periods
Solution Approach 1:
The device employs a deformable membrane that can dynamically adjust its position between a first position (allowing three-dimensional growth space) and a second position (constraining cells to a two-dimensional plane). This dynamic adjustment enables the system to maintain cells in a two-dimensional configuration for extended periods while preserving cell viability, resolving the contradiction between culture duration and reliability.
2Productivity
If high throughput screening is implemented, then productivity increases, but measurement precision and imaging resolution may be compromised
Solution Approach 1:
The device incorporates multiple independently controllable chambers, each capable of holding and imaging individual cells or small groups of cells. This segmentation allows parallel processing of multiple samples simultaneously, maintaining high throughput while ensuring that each cell receives sufficient imaging resolution and attention, thereby resolving the contradiction between productivity and measurement precision.
3Adaptability or versatility
If multiple environmental conditions are tested, then adaptability increases, but device complexity increases
Solution Approach 1:
The device features a modular design where a single chamber structure can accommodate multiple environmental conditions through programmable fluid delivery and membrane actuation. The deformable membrane mechanism serves multiple functions: it constrains cells to two dimensions, controls growth medium flow, and enables different environmental conditions to be applied to different chambers. This multi-functionality allows testing of multiple environmental conditions without proportionally increasing device complexity.
4Measurement precision
If small cell types like Mycobacterium tuberculosis are studied, then measurement precision improves, but maintaining them in two-dimensional plane becomes difficult
Solution Approach 1:
The device uses a deformable membrane that can be precisely controlled to create a two-dimensional constraint plane. This flexible membrane structure provides the necessary mechanical constraint for small cell types like Mycobacterium tuberculosis to maintain a two-dimensional configuration without compromising their natural behavior. The membrane's flexibility allows it to adapt to the specific size and shape requirements of different cell types, making it easier to operate with small cells while maintaining measurement precision.
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
Enables stable, long-term imaging of individual cells, including small bacterial species like Mycobacterium tuberculosis, with high spatial and temporal resolution, suitable for diverse cell types and conditions, facilitating diagnostics and therapeutics development.
Implementation Method 1
actuating the membrane by applying a pressure to a liquid fluid circulating the upper fluidic network so that the pressure lowers the membrane toward the bottom surface of the lower compartment
Implementation Method 2
a deformable membrane disposed between the lower compartment and the upper compartment
Data Source
Figure 1A~1H
Figure 2A~2C
Figure 3A~3D
AI summary
Multiplexable microfluidic culture chamber for imaging monolayer growth of single cells The present invention relates generally to a microfluidic device (1a, 1b), particularly for use in single cell analysis. More specifically, the present invention relates to a microfluidic device (1a, 1b) comprising at least one chamber (10), in particular at least two chambers (10) comprising a deformable membrane (16) and having a structure and geometry configured to enable formation of two-dimensional cell culture, in particular two-dimensional cell growth area (29), and imaging thereof over a growth period or a time period sufficient to analyze cells, in particular to monitor cell growth. The microfluidic device (1a, 1b) allows for multi-condition operation of single-cell screening at high spatiotemporal resolution. The present invention also relates to methods for fabrication and use of such devices.