Cell Nucleus Deformability Profiling Using Microgroove Fluorescence
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Solution Overview
Problem
Current laboratory methods for characterizing the mechanical properties of cell nuclei are low-throughput, complex, and costly, making them unsuitable for clinical applications, and existing microfluidic systems are still complex and do not effectively measure deformation in depth.
Innovation Solution
A process involving culturing cells on a microstructured plate with predetermined microgrooves, measuring fluorescence signals, and determining deformation classes based on fluorescence intensity profiles and morphological parameters to assess cell nucleus deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If atomic force microscopy, micropipette aspiration or microrheometry are used to test mechanical properties of cell nuclei, then measurement precision is improved, but productivity deteriorates due to low-throughput
Solution Approach 1:
The patent replaces complex mechanical measurement systems (atomic force microscopy, micropipette aspiration, microrheometry) with a simple microfluidic system that uses fluid flow to induce nuclear deformation. The mechanical properties are inferred from morphological changes captured by microscopy, eliminating the need for complex mechanical testing equipment while achieving high throughput.
Solution Approach 2:
The patent creates a simplified copy of the measurement problem by using image analysis of nuclear morphology instead of direct mechanical measurement. The deformation class classification system provides a simplified representation of complex mechanical properties, enabling high-throughput screening while maintaining diagnostic accuracy.
2Measurement precision
If atomic force microscopy, micropipette aspiration or microrheometry are used to test mechanical properties of cell nuclei, then measurement precision is improved, but device complexity worsens
Solution Approach 1:
The patent replaces complex mechanical measurement systems with a microfluidic system that uses standard microscopy equipment. The mechanical testing function is substituted by fluid flow-induced deformation and optical imaging, significantly reducing equipment complexity while maintaining measurement capability.
Solution Approach 2:
The patent segments the measurement process into separate functional components: microfluidic channel for deformation induction, fluorescence imaging for nuclear visualization, and image analysis software for quantification. This modular approach reduces overall system complexity compared to integrated complex mechanical testers.
3Measurement precision
If fluorescence image analysis is performed on nuclei with various shapes to determine deformation, then measurement precision is improved, but device complexity worsens due to analysis complexity
Solution Approach 1:
The patent transforms complex shape analysis into simplified parameter classification by defining discrete deformation classes (Class 1: minimal deformation, Class 2: moderate deformation, Class 3: strong deformation). This parameter discretization reduces the complexity of image analysis while maintaining precise deformation characterization capability.
Solution Approach 2:
The patent applies partial action by focusing image analysis only on specific nuclear features (fluorescence intensity distribution, nuclear shape) rather than complete morphological characterization. This selective analysis approach reduces computational complexity while providing sufficient precision for deformation classification.
4Measurement precision
If micropatterned topographies are used to reveal differences between cancer and benign cells, then measurement precision is improved, but productivity deteriorates due to precise topography requirements
Solution Approach 1:
The patent simplifies the microtopography design by using uniform microgroove structures with standardized dimensions rather than complex micropatterned topographies. This parameter standardization enables high-throughput processing while maintaining the ability to differentiate cell types through nuclear deformation analysis.
Solution Approach 2:
The patent creates a universal microgroove platform that can be used for multiple cell types and disease states without requiring customized topography designs. The standardized microgroove structure serves multiple functions: mechanical deformation induction, fluid flow guidance, and consistent imaging geometry, enabling high-throughput screening.
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
Provides a simple, robust, and high-throughput method for characterizing cell nucleus deformability, enabling reliable disease detection and compound screening with improved accuracy by analyzing deformation classes.
Implementation Method 1
measuring, by microscopy, a fluorescence signal of the nucleus of said cells, the nucleus of said cells having been treated beforehand to emit fluorescence radiation
Data Source
AI summary
The invention relates to a method for characterising the deformability of cells or a portion of cells in a sell sample, the method comprising: culturing the cells on a microstructured plate having microgrooves with a predetermined width and depth for at least partially engaging the nuclei of the cells in one or more microgrooves, at least one portion of the surface of the microgrooves being a cell adhesion surface; measuring a fluorescence signal of the nuclei, which nuclei are pre-treated so as to emit fluorescence radiation; on the basis of the fluorescence signal measured for each nucleus, determining a fluorescence intensity profile and at least one morphological parameter of the nucleus; on the basis of the fluorescence intensity profile and the at least one morphological parameter, determining a deformation class of the nucleus in the depth of the microgrooves.