Imaging Flow Cytometry for Spatially Resolved Single-Cell Screening
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Solution Overview
Problem
Existing cell-based phenotypic drug screening methods are limited by the lack of two-dimensional spatial resolution and imaging capabilities in flow cytometers, leading to low throughput and inefficient analysis of cell morphological information.
Innovation Solution
An imaging flow cytometry-based method that includes fluorescent labeling of cells, acquiring single-cell images, and analyzing them using AI algorithms to extract morphological and molecular information, enabling high-throughput drug screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional flow cytometry is used for high-throughput screening, then throughput is high (10^3 cells/second), but spatial resolution and imaging capability are lacking
Solution Approach 1:
The patent combines flow cytometry technology with high-speed microscopy technology to create an imaging flow cytometer. This merging allows the system to simultaneously achieve the high throughput of flow cytometry (10^2-10^4 cells/second) and the spatial resolution of microscopy, resolving the technical contradiction between throughput and measurement precision.
Solution Approach 2:
The imaging flow cytometer performs multiple functions: it conducts high-throughput cell analysis like conventional flow cytometers while simultaneously capturing multi-channel fluorescence images and scattered light images with spatial resolution. This multi-functionality allows a single device to address both the throughput requirement and the spatial resolution requirement.
2Measurement precision
If high-resolution fluorescence microscopy is used for precise analysis, then spatial resolution is high, but throughput is low and analysis is time-consuming
Solution Approach 1:
The patent merges flow cytometry's high-speed particle delivery capability with high-speed microscopy's imaging capability. The flow cytometer delivers cells at high speed (10^2-10^4 cells/second) while the high-speed microscopy component captures images at matching speeds, enabling both high resolution and high throughput simultaneously.
Solution Approach 2:
The patent replaces the traditional sequential analysis approach (first flow cytometry screening, then microscopy analysis) with a parallel system where imaging and high-speed flow occur simultaneously. This substitution of the mechanical/sequential process with a parallel integrated system resolves the throughput-resolution contradiction.
3Productivity
If conventional flow cytometry without imaging is used, then throughput is high, but morphological information analysis is inefficient
Solution Approach 1:
The patent uses multi-channel fluorescence labeling to provide visual information about cell morphology and molecular markers. Different fluorescent dyes label different cell components (nucleus, cytoplasm, specific proteins), creating distinct visual patterns that preserve morphological information while maintaining high throughput through the imaging flow cytometry system.
Solution Approach 2:
The imaging flow cytometer creates optical copies (images) of cells at high speed during flow analysis. These images capture morphological information that can be stored and analyzed, preventing information loss while maintaining the high throughput of flow cytometry by acquiring image data during the flow process rather than requiring separate imaging steps.
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 method significantly increases screening efficiency by 10^2-10^4 times, allowing for rapid analysis of cell components, organelles, and drug effects, including cell proliferation, apoptosis, and toxicity, through multi-channel fluorescence and scattered light imaging.
Implementation Method 1
performing fluorescent labeling of the candidate drug-treated cells that are obtained in step (1) to prepare a cell suspension
Implementation Method 2
acquiring single-cell images by a flow cytometer
Data Source
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AI summary
An imaging flow cytometry-based high-throughput drug screening method, comprising: cell incubation, cell staining, acquiring single-cell images by means of a flow cytometer, and image extraction and analysis, which combines the high-throughput advantages of flow cytometry and the imaging capability of a microscope, so that multi-channel single-cell images can be generated in a high throughput manner, thereby implementing acquisition of fluorescent images and unmarked images of single cells at a throughput of 102-105 cells per second, which can be used for cell phenotype drug screening and improving the screening efficiency by a factor of 102-104.