Cyanine Dye Staining Erythroblasts Flow Cytometry
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Solution Overview
Problem
Current methods for detecting erythroblasts in biological samples are time-consuming, rely on subjective observation, and use carcinogenic substances like ethidium bromide, which are less sensitive and pose environmental threats, while existing fluorescent dyes have long synthesis processes and high costs.
Innovation Solution
Development of cyanine compounds with specific structural formulas that emit little fluorescence unbound to nucleic acids, exhibit rapid fluorescence intensity increase upon binding, and have near-infrared light spectra, stability under light illumination, and a short synthesis process, suitable for use in flow cytometry and environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ethidium bromide is used for detecting erythroblasts, then detection can be performed, but the method is time-consuming and relies on subjective observation
Solution Approach 1:
The patent changes the detection parameters by using fluorescent dyes with specific excitation and emission wavelengths (e.g., Ex 488nm/Em 520nm, Ex 543nm/Em 575nm) that match flow cytometer laser lines, enabling automated optical detection instead of manual microscopic observation, thus reducing time and improving precision
Solution Approach 2:
The patent replaces the mechanical/manual microscopic observation system with an automated flow cytometry system that uses optical detection and electronic data processing to automatically identify and count erythroblasts, eliminating subjective observation and reducing detection time
2Measurement precision
If ethidium bromide is used for staining, then erythroblasts can be detected, but carcinogenic substances are used posing environmental threats
Solution Approach 1:
The patent replaces harmful carcinogenic dyes with safe fluorescent dyes that have similar or superior binding properties to nucleic acids, converting the harmful staining approach into a safe one while maintaining or improving detection capability through optimized fluorescence properties
Solution Approach 2:
The patent uses fluorescent dyes that are easily degradable in aqueous solutions, replacing persistent carcinogenic substances with short-lived, environmentally benign alternatives that break down quickly and pose no long-term environmental threat
3Measurement precision
If existing fluorescent dyes are used, then detection sensitivity is improved, but synthesis processes are long and costs are high
Solution Approach 1:
The patent segments the synthesis process into simple, modular steps with readily available starting materials, breaking down the complex synthesis into manageable stages that can be performed efficiently, thereby reducing overall synthesis time and cost while maintaining high detection sensitivity
Solution Approach 2:
The patent optimizes synthesis parameters including solvent selection, temperature, and reaction time to achieve high yields of fluorescent dyes with short synthesis cycles, changing the process parameters to improve productivity without compromising the sensitivity and performance of the detection dyes
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 cyanine compounds provide accurate, rapid, and cost-effective detection of erythroblasts with improved light stability and safety, avoiding background interference and reducing operational risks, while being easily degradable in aqueous solutions.
Implementation Method 1
fluorescent dyes. More particularly, the present disclosure relates to cyanine compounds applicable to staining biological samples
Data Source
AI summary
Cyanine compounds having the general formula I for staining biological samples, wherein R1, R2, X, Y, A1 and A2 are as defined in the specification. These kinds of compounds may show good light illumination stability, have a maximum absorption peak around 640 nm that may not change as a function of ambient temperature, have rapidly increased fluorescence intensity upon binding to nucleic acids to form compound/nucleic acid complexes, and have a light spectrum in the near-infrared region, thereby effectively reducing interference from background fluorescence and increasing the accuracy of the detection when used as a staining agent for nucleic acids in a flow cytometer. The compounds provided can be used as a staining agent for erythroblasts in the blood.