HRV Detection via Conserved 5' UTR RT-PCR Assay
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Solution Overview
Problem
Current methods for detecting human rhinovirus (HRV) are often time-consuming, expensive, and prone to false positives due to the similarity with enterovirus (EV), necessitating a rapid, sensitive, and specific detection method.
Innovation Solution
The use of nucleic acid-based assays targeting a conserved 5' untranslated region of the HRV genome, with specific primers and probes, allows for the detection of HRV while avoiding false positives from EV, utilizing real-time PCR technology for rapid and accurate results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (virus neutralization assay, sequencing, hybridization) are used to differentiate HRV from EV, then detection accuracy is improved, but time consumption and operational complexity increase
Solution Approach 1:
The invention divides the detection process into two distinct stages: first, a general picornavirus detection step that captures both HRV and EV, followed by a second discriminatory step using HRV-specific probes or primers. This segmentation allows the assay to benefit from the sensitivity of broad detection while achieving HRV-specific accuracy, eliminating the need for time-consuming sequential methods like neutralization assays or sequencing.
Solution Approach 2:
The invention performs preliminary amplification of picornavirus nucleic acid using conserved region primers before the discriminatory detection step. This preliminary action ensures that sufficient target material is available for the subsequent HRV-specific detection, improving sensitivity while maintaining rapid turnaround time compared to methods that require separate confirmation steps.
2Reliability
If HRV-specific primer pairs are selected to improve specificity, then false positives from EV are reduced, but detection sensitivity across diverse HRV serotypes decreases
Solution Approach 1:
The invention employs universal primers that bind to conserved regions of the picornavirus genome present in all HRV serotypes, enabling broad detection. For specificity, it uses multiple HRV-specific probes or nested primers that can distinguish HRV from EV and cover diverse serotypes, making the assay universally applicable across HRV types while maintaining high specificity.
Solution Approach 2:
The invention optimizes detection parameters including probe concentration, annealing temperature, and magnesium ion concentration to enhance specificity. By carefully adjusting these parameters, the assay achieves high discrimination between HRV and EV while maintaining sensitivity across different HRV serotypes with sequence variations in the target region.
3Reliability
If complex differentiation methods are employed to avoid false positives, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The invention merges the amplification and detection steps into a single integrated assay format. By combining HRV-specific probes with universal picornavirus primers in one reaction tube, the assay achieves high reliability for distinguishing HRV from EV without requiring multiple separate tests or complex equipment, thereby reducing overall assay complexity and cost.
Solution Approach 2:
The invention uses sequence-specific oligonucleotide probes as intermediaries that bridge the gap between general picornavirus amplification and HRV-specific detection. These probes act as mediators that bind selectively to HRV amplicons, providing reliable differentiation from EV through a simple, single-step detection process that does not require complex equipment or multiple操作步骤.
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 approach enables the sensitive and specific detection of HRV across various serotypes, reducing false negatives and positives, and is suitable for clinical diagnostics and therapeutic drug development.
Implementation Method 1
Reverse transcription-polymerase chain reaction (RT-PCR) has been developed in the past few years for the detection of the HRVs in clinical specimens
Implementation Method 2
Reverse transcription-polymerase chain reaction (RT-PCR) has been developed in the past few years for the detection of the HRVs in clinical specimens
Implementation Method 3
Most of these RT-PCR methods take advantage of the conserved sequences in the 5′ noncoding region of the picomavirus genome
Data Source
AI summary
The invention provides methods and compositions for rapid, sensitive, and highly specific nucleic acid-based (e.g., DNA based) detection of human rhinovirus (HRV) in a sample. In general, the methods involve detecting a target nucleic acid having a target sequence of a conserved 5′ untranslated region of the HRV genome. The invention also features compositions, including primers, probes, and kits, for use in the methods of the invention.