DNA-Chip Genotyping via Segmented Probe Arrays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DNA-chips face challenges in simultaneously detecting genetic variations with high sensitivity, specificity, and reproducibility, limiting their application in clinical diagnosis, particularly for conditions like Inflammatory Bowel Disease (IBD), erythrocyte antigens, and adverse reactions to medicine.
Innovation Solution
A method involving DNA-chips with specifically designed oligonucleotide probe pairs and a sequential data processing algorithm that uses hybridization signal intensity to determine genotypes with high accuracy, allowing for the simultaneous, sensitive, specific, and reproducible detection of genetic variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DNA-chips are used to detect genetic variations, then large scale studies and high-throughput analysis are enabled, but sensitivity, specificity, and reproducibility are insufficient for clinical diagnosis
Solution Approach 1:
The chip surface is divided into multiple independent probe regions, each targeting specific genetic variations. This segmentation allows parallel detection of multiple SNPs while maintaining high sensitivity for each individual detection site, resolving the contradiction between high-throughput capability and diagnostic reliability.
Solution Approach 2:
Different regions of the chip are designed with locally optimized probe characteristics tailored to specific detection requirements. Each probe region has customized oligonucleotide sequences and concentrations optimized for its target genetic variation, enabling high specificity and sensitivity for each detection site while maintaining overall high-throughput capability.
2Productivity
If multiple genetic variations are detected simultaneously, then efficiency is improved, but measurement precision and reproducibility deteriorate
Solution Approach 1:
The detection system is segmented into multiple independent probe regions, each responsible for detecting specific genetic variations. This segmentation enables simultaneous detection of multiple SNPs while maintaining high measurement precision for each individual genotype determination through dedicated optimized probes.
Solution Approach 2:
The chip employs parameter optimization including adjusted oligonucleotide lengths, concentrations, and sequence compositions for different probe regions. These parameter changes enable simultaneous detection of multiple genetic variations with high precision by tailoring detection conditions to each specific target.
3Measurement precision
If probe density is increased to enhance detection capability, then sensitivity improves, but manufacturing complexity and cost increase
Solution Approach 1:
The chip design uses universal probe structures and standardized manufacturing processes that can detect multiple genetic variations. This multi-functionality approach achieves high detection sensitivity through optimized probe density while avoiding excessive manufacturing complexity by using consistent fabrication methods across different detection targets.
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 reliable clinical genetic diagnosis by accurately identifying genetic variations associated with IBD, erythrocyte antigens, and adverse reactions, improving diagnostic precision and treatment strategies.
Implementation Method 1
contacting the target DNA with the probes under conditions which allow hybridisation to occur, thereby forming nucleic acid-probe hybridisation complexes
Data Source
AI summary
An in vitro method for genotyping genetic variations in a individual, and products for use in the method.