Microarray DNA Damage Detection via Tagged Binding Factors
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Solution Overview
Problem
Current methods for detecting DNA damage lack the precision to determine both the location and extent of damage within the genome, making it difficult to assess the functional significance of DNA alterations and the effectiveness of DNA-damaging agents or repair mechanisms.
Innovation Solution
A method utilizing microarrays to analyze DNA damage by tagging DNA damage binding factors, such as proteins or antibodies, which bind to damaged sites, allowing for the precise localization of DNA damage through hybridization and visualization on a microarray, enabling the determination of damage location and extent within the genome.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional DNA damage detection methods are used, then the overall detection capability is maintained, but the precision of determining damage location and extent is insufficient
Solution Approach 1:
The method segments the DNA into fragments and uses microarray probes to specifically detect and locate damage sites. By dividing the detection process into discrete measurable units (fragments, probes, hybridization events), the system achieves precise location and extent determination while maintaining manageable complexity through automated analysis.
Solution Approach 2:
The patent introduces DNA damage binding factors (proteins or antibodies) as intermediaries that specifically bind to damaged DNA sites. These intermediaries serve as detectable markers that bridge the gap between the DNA damage itself and the detection system, enabling precise localization without directly measuring the damage chemistry.
2Measurement precision
If high resolution location analysis is undertaken, then the precision of pinpointing damage within the genome is improved, but the complexity of the analysis system increases
Solution Approach 1:
The method creates a copied representation of the genome on the microarray, where specific sequences are replicated as probes. By analyzing the hybridization pattern of damaged DNA fragments to these copies, the system achieves high-resolution location mapping without requiring direct manipulation of the entire genome, thus reducing operational complexity.
Solution Approach 2:
The patent replaces complex mechanical or manual analysis methods with automated molecular hybridization and detection systems. The use of fluorescent labeling, microarray technology, and automated scanning/reasoning replaces manual sequencing or physical mapping approaches, achieving high precision while simplifying the overall workflow through automation.
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 accurate detection of DNA damage location and extent, facilitating the assessment of DNA-damaging agent targeting and repair mechanisms, and providing a tool for screening compounds that cause DNA damage or affect DNA repair.
Implementation Method 1
exposing said optionally amplified and labelled precipitated fragments to a selected microarray under conditions that enable the fragments to hybridise to the array
Implementation Method 2
exposing said DNA to at least one selected DNA damage binding factor, which factor has been tagged with a given binding molecule
Data Source
AI summary
The invention relates to a method of for detecting DNA damage in a tissue sample. The method includes the steps of exposing sample DNA to a tagged DNA-damage binding factor and then shearing the DNA to produce fragments. After separating damaged from undamaged DNA, the two are amplified and differentially labeled. The labeled fragments can be immobilized on a microarray allowing the location and extent of any DNA damage to be determined.