Multiplex PCR Probes for Viral Pathogen Detection Specificity
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Solution Overview
Problem
Current methods for detecting Influenza A, Influenza B, and Respiratory Syncytial Viruses lack efficiency and specificity, leading to inadequate diagnosis and increased morbidity, mortality, and economic costs due to the limitations in accurately identifying these pathogens in clinical samples.
Innovation Solution
The development of compositions and kits utilizing polymerase chain reaction (PCR) and reverse transcription PCR assays for the detection of viral nucleic acids, including the use of specific probes and primers that target Influenza A, Influenza B, Respiratory Syncytial Virus A, and Respiratory Syncytial Virus B, allowing for simultaneous amplification and detection in clinical samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used for Influenza and RSV, then the detection process is simpler, but the sensitivity and specificity are insufficient leading to misidentification
Solution Approach 1:
The detection system is segmented into multiple independent probe sets, each targeting specific viral pathogens (Influenza A, Influenza B, RSV A, RSV B). Each probe contains a unique fluorescent reporter and quencher pair, allowing individual detection and differentiation of each pathogen type through distinct fluorescence signals.
Solution Approach 2:
The assay utilizes a universal qPCR platform that can detect multiple viral pathogens simultaneously using a single reaction mixture containing all necessary probes and primers. This multi-functional approach enables differential diagnosis of respiratory viruses in one test rather than requiring separate tests for each pathogen.
2Measurement precision
If conventional detection methods are used, then the assay is easier to perform, but the detection sensitivity is inadequate for accurate diagnosis
Solution Approach 1:
The invention replaces conventional mechanical or manual detection methods with a fluorescent-based optical detection system. The probes incorporate fluorescent reporters and quenchers that generate detectable optical signals upon hybridization to target viral nucleic acids, enabling highly sensitive detection through fluorescence quantification rather than manual observation.
Solution Approach 2:
Fluorescent probes serve as intermediaries between the viral nucleic acid targets and the detection system. The probes hybridize specifically to pathogen-specific sequences and generate fluorescent signals that can be amplified and detected by qPCR instrumentation, bridging the gap between molecular target and measurable output.
3Productivity
If multiple separate tests are performed for different viruses, then each test can be optimized for its specific pathogen, but the overall diagnostic process takes longer and increases costs
Solution Approach 1:
Multiple pathogen detection assays are merged into a single multiplex qPCR reaction. The reaction mixture contains primer and probe sets for Influenza A, Influenza B, RSV A, and RSV B simultaneously, allowing all four pathogens to be detected in one test tube using a single aliquot of clinical sample and one reaction volume of reagents.
Solution Approach 2:
The qPCR reagent mixture serves multiple functions by containing all necessary components for detecting different viral pathogens: universal PCR buffer, DNA polymerase, dNTPs, and pathogen-specific primer-probe sets. This universal formulation eliminates the need for separate optimized reactions for each pathogen.
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
These methods provide sensitive and specific detection of viral pathogens, enabling accurate differential diagnosis and reducing the risk of misidentification, thereby improving patient outcomes and reducing healthcare costs.
Implementation Method 1
the in vitro diagnostic analysis utilizes polymerase chain reactions (PCR)
Implementation Method 2
A particularly useful in vitro assay for use with the Flu A, Flu B, RSV A or RSV B target nucleic acids is a reverse transcription PCR assay
Implementation Method 3
Each probe comprises a fluorophore and a quencher
Implementation Method 4
The fluorophore and the quencher are as described herein
Data Source
AI summary
This disclosure concerns amplification primers, hybridization assay probes, compositions containing such primers and probes, and associated reagents, kits, and methods, that can be used to analyze samples for the presence of Influenza A virus, Influenza B virus, Respiratory Syncytial Virus A, and/or Respiratory Syncytial Virus B target nucleic acids.