Dye-Coated Cover Slip Staining for Rapid Sperm DNA Fragmentation Detection
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Solution Overview
Problem
Conventional methods for detecting sperm DNA fragmentation (SDF) are time-consuming and complex, particularly due to electrophoresis and software analysis processes in comet assays, and determining halo width in sperm chromatin dispersion tests is difficult.
Innovation Solution
A method involving embedding sperm cells in a gel on a carrier slide, treating with lysis and DNA denaturation solutions, and using a dye-coated cover slip to stain the reaction product directly, allowing for rapid detection of SDF by observing halo formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If comet assay is used to detect SDF, then detection sensitivity is improved, but operation complexity and time consumption increase due to electrophoresis and software analysis
Solution Approach 1:
The patent extracts and eliminates the complex electrophoresis and software analysis steps from the detection process. By using a modified halo assay with chemical methods alone, it removes the harmful complexity while preserving detection capability through direct chemical denaturation and visualization of DNA loops.
Solution Approach 2:
The patent replaces the mechanical/electrical electrophoresis system with a simpler chemical system. Instead of using electric fields to separate DNA fragments, it employs chemical denaturation agents (alkaline solution) and enzymes (DNase I) to directly process and visualize DNA loops, eliminating the need for complex electrophoresis equipment and software analysis.
2Measurement precision
If comet assay is used to detect SDF, then detection sensitivity is improved, but time consumption increases
Solution Approach 1:
The patent removes the time-consuming electrophoresis and software analysis steps from the detection workflow. By using direct chemical methods with the modified halo assay, it extracts only the essential detection function while eliminating unnecessary time-consuming processes.
Solution Approach 2:
The patent skips the intermediate electrophoresis step entirely by using direct chemical denaturation and enzymatic processing. This allows the detection process to rush through to the final visualization step more quickly, reducing overall time consumption while maintaining detection sensitivity.
3Ease of operation
If sperm chromatin dispersion test is used to detect SDF, then operation is simplified, but measurement precision deteriorates due to difficulty in determining halo width
Solution Approach 1:
The patent employs color changes through specific staining procedures to enhance the visibility and measurability of the halo structure. By using stains that produce distinct color contrasts between the sperm head core and the dispersed DNA loops, it makes halo width determination more precise and less subjective.
Solution Approach 2:
The patent modifies the chemical parameters of the assay, including pH, enzyme concentration, and staining conditions, to optimize the halo formation and visibility. These parameter changes enhance the contrast and definition of the halo structure, making width measurement more accurate and reliable.
4Manufacturing precision
If conventional staining procedures are used, then staining is achieved, but process complexity and time consumption increase
Solution Approach 1:
The patent merges multiple separate staining steps into a single integrated staining procedure. By combining the staining reagents and steps that were previously performed separately, it simplifies the overall process while maintaining staining quality, reducing both complexity and time consumption.
Solution Approach 2:
The patent develops a universal staining protocol that works effectively for the modified halo assay and can be applied to various detection scenarios. This multi-functional staining approach eliminates the need for multiple specialized staining procedures, simplifying the process while maintaining high staining quality across different applications.
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
Simplifies and accelerates the staining process, enabling rapid and accurate detection of SDF without the need for electrophoresis or complex software analysis, reducing specimen uncertainty and improving efficiency.
Implementation Method 1
immersing the microscope slide in a lysis solution to break open the cell membrane and lyse the cellular proteins
Implementation Method 2
the agarose gel is exposed to an electric field to attract negatively charged fragments of DNA toward the anode
Implementation Method 3
After DNA staining with a fluorescent dye, the comet-like structure is visualized using a fluorescence microscope
Implementation Method 4
contacting the reaction product with a coated side of a cover slip... wherein the coated side of the cover slip is coated with one or more staining agents, to stain the reaction product
Data Source
AI summary
The present invention relates to staining dye-coated cover slips and methods of using them. The present invention provides an improved method where a test is carried out on a carrier slide. The method uses a cover slip wherein one side of the cover slip is coated with one or more dyes to stain the final reaction product after one or more reactions occurred on a carrier slide. The cover slip is placed on top the carrier slide with coated side facing the carrier slide, to stain the product after one or more reactions on a carrier slide are complete. The present invention simplifies and accelerates the staining procedures on a carrier slide after the reaction is completed on the carrier slide.