ITGA4 Methylation Detection Kit Using Magnetic Bead Probes
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Solution Overview
Problem
Current methods for detecting ITGA4 gene methylation in feces and tissue specimens have limitations in sensitivity and specificity for colorectal cancer and adenoid tumor detection, necessitating improved detection kits and methods.
Innovation Solution
A detection kit and method utilizing a magnetic bead probe complex and specific primers and probes (SEQ ID NO: 1-6) for capturing and quantifying ITGA4 gene methylation, enhancing sensitivity and specificity through bisulfite treatment and PCR amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detection methods are used for ITGA4 gene methylation, then the detection process is simple, but the sensitivity and specificity for colorectal cancer and adenoid tumor detection are insufficient
Solution Approach 1:
The detection kit is divided into distinct functional modules: a capturing reagent module for enriching methylated ITGA4 DNA, a bisulfite treatment module for DNA demethylation, and a PCR detection module for amplification and detection. This segmentation allows each module to be optimized independently, improving overall detection sensitivity and specificity while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces a magnetic bead probe complex as an intermediary capturing reagent that selectively binds to methylated ITGA4 DNA sequences. This intermediary component enables efficient enrichment of target DNA from complex fecal samples, significantly improving detection sensitivity without requiring complex sample processing procedures
2Measurement precision
If the detection threshold is lowered to increase sensitivity, then more cases are detected, but false positive rates increase reducing specificity
Solution Approach 1:
The kit performs preliminary enrichment of methylated ITGA4 DNA using the magnetic bead probe complex before PCR amplification. This preliminary action concentrates the target DNA and reduces background noise, allowing for sensitive detection while maintaining high specificity by ensuring that only enriched target sequences are amplified and detected
Solution Approach 2:
The patent employs bisulfite treatment to chemically modify methylated cytosines to 5-methylcytosine, creating a detectable parameter change that enables differentiation between methylated and unmethylated DNA. This parameter change allows for sensitive and specific detection of methylation status without increasing false positive rates
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 solution achieves high specificity (95.2-97.6%) and sensitivity (83.8-96.2%) in detecting ITGA4 methylation in feces and tissue specimens, outperforming previous methods with improved detection rates for colorectal cancer and adenoid tumors.
Implementation Method 1
The ITGA4 gene capturing reagent comprises a magnetic bead probe complex comprising a sequence of the probe shown as SEQ ID NO: 1
Implementation Method 2
enhancing sensitivity and specificity through bisulfite treatment and PCR amplification
Implementation Method 3
enhancing sensitivity and specificity through bisulfite treatment and PCR amplification
Data Source
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Figure 3
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AI summary
Provided are a detection kit and detection method for ITGA4 gene methylation. A primer and a probe provided by the present invention are matched, then detection can be carried out by taking a feces sample as an object, and thus the detection is simple, convenient and rapid. The detection can also be carried out on tissue specimens. Moreover, in the process of detecting the samples, the detection specificity and sensitivity are also improved. The experiment proves that for the feces specimen, when the specificity is 95.2%, the sensitivities of the methylated ITGA4 to intestinal cancer and adenoid tumor are 83.8% and 41.6%, respectively; and for the intestinal cancer tissue, when the specificity is 97.6% (40/41), the detection rates for colorectal cancer and adenoid tumor are 96.2% (101/105) and 71.6% (78/109), respectively. The effects are superior to the detection effects obtained by adopting other primers or probes.