Live-Cell Fluorescent Dual Staining for Cell and Nucleus Imaging
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Solution Overview
Problem
Current fluorescent staining methods for live-cell imaging lack specificity, sensitivity, and accuracy, often requiring cell fixation and failing to simultaneously visualize both cell and nucleus forms, with existing dual-staining methods also falling short in clinical applications.
Innovation Solution
A dual-staining method using a combination of fluorescent biomarkers, such as fluorescein sodium and methylene blue, or 5-aminolevulinic acid and acriflavine, to stain live cells, allowing simultaneous visualization of cell and nucleus forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single fluorescent biomarker staining is used, then the operation is simple, but the imaging contrast and specificity are insufficient
Solution Approach 1:
The patent combines two different fluorescent biomarkers (first and second biomarkers) into a dual-staining method. The first biomarker stains cell contours while the second biomarker stains nuclei, creating enhanced imaging contrast and specificity without significantly complicating the操作流程. This merging of multiple staining functions resolves the contradiction between operational simplicity and imaging precision.
2Stability of the object's composition
If cell fixation is performed to improve imaging stability, then the imaging stability improves, but the live-cell imaging capability is lost
Solution Approach 1:
The patent uses fluorescent biomarkers that can stain live cells without requiring fixation, changing the parameter of cell state from fixed to live. The specific fluorescent compounds mentioned (such as fluorescein diacetate and DAPI alternatives) are designed to penetrate live cell membranes and stain cellular structures while maintaining cell viability, thus resolving the contradiction between imaging stability and live-cell capability.
3Measurement precision
If 5-ALA is used for tumor detection, then the sensitivity improves, but the strong fluorescence background reduces detection accuracy
Solution Approach 1:
The patent applies local quality by using different fluorescent biomarkers with different emission characteristics for different cellular components. The first biomarker provides background fluorescence while the second biomarker provides specific nuclear staining, allowing differentiation of tumor cells from normal cells based on nuclear characteristics rather than relying solely on background fluorescence intensity.
4Measurement precision
If dual-staining method is used to improve imaging contrast, then the detection accuracy improves, but the staining complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-selecting and optimizing combinations of fluorescent biomarkers that work well together in dual-staining applications. The method provides a standardized protocol for sequential or simultaneous application of two biomarkers, reducing the complexity burden through established procedures while maintaining improved detection accuracy.
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 enhances imaging contrast and specificity, enabling clear differentiation between normal and tumor tissues, improving surgical precision and clinical outcomes.
Implementation Method 1
Fluorescence is a kind of 'photoluminescence', which is a form of luminescence. When a particular normal temperature substance is illuminated by the incident light of a specific wavelength, it enters the exciting state after absorbing the light energy. It immediately emits emergent light with a longer wavelength than incident light.
Implementation Method 2
Fluorescence is a kind of 'photoluminescence', which is a form of luminescence. When a particular normal temperature substance is illuminated by the incident light of a specific wavelength, it enters the exciting state after absorbing the light energy.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 1E
AI summary
The present invention provides a fluorescent staining method for live-cell imaging. First, cells are double stained through the first and second fluorescent biomarker. Then, the clear fluorescent cell image is shown under a fluorescent microscope, and we can observe the nucleus form while observing the cell form through the obtained image.