Multiplex Nucleic Acid Amplification Assay for Respiratory Pathogen Detection
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Solution Overview
Problem
Current diagnostic techniques for respiratory infections are time-consuming, costly, and often lead to incorrect or inconclusive diagnoses due to their limitations in sensitivity and high-throughput detection capabilities, particularly when dealing with multiple respiratory pathogens.
Innovation Solution
A multiplex nucleic acid amplification assay that isolates nucleic acid from a sample, subjects it to amplification using primer pairs with optically detectable labels, and uses a beadset with subsets of beads of varying sizes and label intensities to detect and differentiate multiple respiratory pathogens through hybridization and binding analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard diagnostic techniques (viral culture, immunofluorescence staining, PCR) are used to identify respiratory pathogens, then detection sensitivity can be achieved, but the diagnostic process becomes time-consuming and costly
Solution Approach 1:
The patent combines multiple diagnostic functions into a single microarray platform that simultaneously performs viral culture, PCR amplification, and hybridization detection. Multiple primer pairs targeting different respiratory pathogens are amplified in one reaction, and all amplicons are detected on a single microarray chip, eliminating the need for separate diagnostic tests for each pathogen.
Solution Approach 2:
The microarray system serves multiple diagnostic functions: it amplifies nucleic acids from various respiratory pathogens using universal primer pairs, captures specific amplicons through hybridization with pathogen-specific probes, and provides simultaneous detection of multiple pathogens. This multi-functional approach replaces multiple specialized diagnostic tests with a single versatile platform.
2Adaptability or versatility
If multiple respiratory pathogens are screened using conventional methods, then comprehensive diagnosis is achieved, but the cost and complexity increase significantly
Solution Approach 1:
The diagnostic system segments the detection process into distinct functional modules: nucleic acid extraction, PCR amplification with multiple primer pairs, microarray hybridization with pathogen-specific probes, and optical detection. Each module performs a specific function, allowing comprehensive multipathogen screening while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent transitions from linear sequential testing to parallel two-dimensional detection on a microarray surface. Multiple probes are arranged in a spatial array, allowing simultaneous detection of numerous pathogens across different spatial locations on the chip, effectively adding a spatial dimension to the diagnostic process.
3Measurement precision
If conventional PCR assays are used for respiratory pathogen detection, then sensitivity is maintained, but high-throughput detection capability is insufficient
Solution Approach 1:
The system creates multiple copies of pathogen-specific detection elements (probes) on the microarray surface, with each probe capturing specific amplicons from the PCR reaction. This copying approach allows simultaneous detection of multiple pathogens without requiring separate PCR reactions for each target, thereby increasing throughput while maintaining sensitivity.
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
This method enables rapid, sensitive, and accurate detection of multiple respiratory pathogens, improving diagnostic efficiency and reducing costs by allowing for simultaneous screening of multiple targets in a single sample.
Implementation Method 1
the amplicon is captured by hybridizing to an oligonucleotide probe that is complementary to a region of the amplicon and immobilized to a bead
Data Source
AI summary
Methods for screening a multiplicity of respiratory pathogens by isolating nucleic acids from a sample include isolating a nucleic acid from a sample and using solid phase amplification with forward primers SEQ ID NOs: 1 to 16 or 33 or 35 and corresponding reverse primers SEQ ID NOs: 17 to 32 or 34 or 36 along with probes to generate amplicons. The method further includes employing bead sets which are homogenous with respect to bead size and optionally with respect to the intensity of the label. Binding of a particular amplicon to a subset of beads determines the identity of the respiratory pathogen.