Cytogenetic Slide Labeling for High-Throughput Telomere Aberration Detection
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Solution Overview
Problem
Current methods for detecting chromosomal and telomere aberrations are time-consuming, require large sample volumes, and lack sensitivity, especially when dealing with repetitive sequences, making them unsuitable for high-throughput analysis.
Innovation Solution
A method involving the preparation of cytogenetic slides in microplate wells with a specific surface-to-volume ratio, simultaneous labeling of telomeres and centromeres using peptide nucleic acid probes, and automated quantification of fluorescence intensity using a 10x magnification objective, allowing for rapid analysis of a large number of cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cytogenetic analysis methods are used, then chromosomal aberrations can be detected, but the analysis is time-consuming and requires large sample volumes
Solution Approach 1:
The patent segments the detection process into distinct fluorescent labeling components: telomere-specific probes (green fluorescence) and centromere-specific probes (red fluorescence). This segmentation allows parallel processing and automated analysis, reducing analysis time while maintaining detection accuracy through multi-parameter fluorescence measurement.
Solution Approach 2:
The patent replaces manual mechanical cytogenetic analysis with automated fluorescence microscopy and image analysis systems. The fluorescent labeling method enables computer-assisted detection and quantification of chromosomal aberrations, eliminating time-consuming manual scoring while improving measurement precision through objective digital measurement.
2Measurement precision
If conventional cytogenetic methods are used, then chromosomal aberrations can be detected, but large quantities of DNA and sample volumes are required
Solution Approach 1:
The patent changes the detection parameter from bulk DNA analysis to single-cell fluorescent in situ hybridization. By using fluorescently labeled probes that bind specifically to telomeric and centromeric sequences in fixed cells, the method achieves high detection accuracy with minimal sample volume (as low as 1-10 μl), eliminating the need for large DNA quantities required by conventional methods.
Solution Approach 2:
The patent extracts and visualizes specific chromosomal regions (telomeres and centromeres) using fluorescent probes, rather than analyzing bulk DNA. This extraction of specific genomic targets allows detection of chromosomal aberrations in individual cells with minimal sample input, while maintaining high measurement precision through fluorescent signal intensity measurement.
3Measurement precision
If Q-FISH method with metaphase analysis is used, then individual telomere length can be estimated, but the quantification is laborious and time-consuming
Solution Approach 1:
The patent creates a multi-functional fluorescent labeling system that simultaneously provides: (1) telomere length measurement via green fluorescence intensity, (2) chromosomal aberration detection via red centromere labeling, and (3) automated image analysis capability. This universal approach enables high-throughput processing while maintaining individual telomere measurement precision, overcoming the laborious nature of conventional Q-FISH.
Solution Approach 2:
The patent uses different fluorescent colors (green for telomeres, red for centromeres) to encode different chromosomal features. This color-based encoding enables automated image analysis software to simultaneously detect and quantify multiple parameters (telomere length, centromere position, chromosomal abnormalities) in high-throughput mode, eliminating manual labor while preserving measurement precision.
4Measurement precision
If methods detecting repetitive sequences are used, then telomere analysis can be performed, but sensitivity is reduced and reliability decreases
Solution Approach 1:
The patent applies local quality by using probes specific to telomeric repetitive sequences (TTAGGG repeats) rather than general genomic probes. The fluorescent signals are localized to specific chromosomal regions (telomeres at chromosome ends), enabling precise measurement of individual telomere lengths while maintaining high reliability through sequence-specific hybridization and controlled fluorescent signal intensity measurement.
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
Enables high-throughput detection of chromosomal and telomere aberrations with a small sample volume, reducing analysis time and increasing reliability, while providing detailed quantification and classification of chromosomes.
Implementation Method 1
simultaneous labeling of telomeres and centromeres by peptide nucleic acid probes
Implementation Method 2
automated quantification of telomere fluorescence intensity
Data Source
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AI summary
The invention relates to a high-throughput method for detecting chromosomal aberrations and/or telomere aberrations, using a biological sample of 150 μl to 200 μl.