Dual Fluorescent Staining for Live Cell and Nuclear Imaging
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Solution Overview
Problem
Current fluorescence staining methods for living cell imaging lack specificity, sensitivity, and contrast, requiring cell fixation and unable to clearly observe both cell and nuclear morphology simultaneously.
Innovation Solution
A method involving simultaneous or separate staining of living cells with sodium fluorescein and methylene blue, allowing visualization of cell morphology and nuclear morphology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single fluorescent dye staining is used, then staining simplicity is maintained, but imaging specificity and contrast are insufficient
Solution Approach 1:
The patent combines two fluorescent dyes (methylene blue and fluorescein sodium) into a dual-staining system. Methylene blue specifically stains cell nuclei while fluorescein sodium stains cell cytoplasm and membranes, allowing simultaneous visualization of both nuclear and cellular morphology with improved specificity and contrast compared to single-dye methods.
Solution Approach 2:
The invention uses a composite staining approach by combining two different fluorescent dyes with distinct spectral properties and targeting specificities. This composite staining strategy enables multi-structural visualization (nucleus and cytoplasm simultaneously) and improves overall imaging contrast and specificity.
2Shape
If cell fixation is performed, then cell morphology preservation is improved, but cell viability is lost
Solution Approach 1:
The patent employs vital fluorescent dyes that allow living cells to maintain their natural state while being stained. The cells continue to exhibit normal physiological functions and morphology during live imaging, eliminating the need for fixation procedures that would kill the cells.
Solution Approach 2:
The invention uses fluorescent dyes with specific excitation and emission wavelength parameters that enable non-invasive imaging of living cells. By selecting dyes with appropriate spectral properties (methylene blue excited at ~600nm, fluorescein sodium excited at ~480nm), the method achieves high-contrast imaging without requiring cell fixation.
3Measurement precision
If multiple fluorescent dyes are used for double-staining, then imaging specificity and contrast are improved, but spectral interference increases
Solution Approach 1:
The patent assigns different spatial localization characteristics to each dye: methylene blue specifically localizes to cell nuclei while fluorescein sodium localizes to cell cytoplasm and membranes. This spatial separation of staining targets, combined with their distinct spectral properties, allows clear differentiation and reduces spectral interference in the imaging system.
4Loss of information
If conventional fluorescence staining is used, then cell visualization is achieved, but simultaneous observation of cell and nuclear morphology is not possible
Solution Approach 1:
The patent merges the staining functions of two different dyes into a single dual-staining protocol. Methylene blue provides nuclear morphology visualization while fluorescein sodium provides cellular morphology visualization, allowing simultaneous observation of both cell and nuclear structures without requiring separate staining 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
Enhances imaging efficiency and safety by clearly distinguishing normal from tumor tissues, providing rapid and accurate visualization of cell and nuclear morphology.
Implementation Method 1
Fluorescence is a cold luminescence phenomenon of 'photoluminescence'. A substance at room temperature, when irradiated by incident light with a specific wavelength, absorbs light energy and enters an excited state, immediately emitting an emergent light having a wavelength longer than that of the incident light, which is called fluorescence.
Implementation Method 2
Fluorescence is a cold luminescence phenomenon of 'photoluminescence'.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 1E
AI summary
A fluorescent staining method for live cell imaging. The method comprises: performing double-staining on cells by means of using fluorescein sodium and methylene blue, and using a fluorescence microscope to detect and display a clear fluorescent cell image. According to the acquired image, the cell morphology can be observed at the same time that the cell nucleus morphology can be observed.