Oligonucleotide Sets for SARS-CoV-2 Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting SARS-CoV-2 are inefficient and lack specificity, leading to delayed diagnosis and potential misidentification of COVID-19 cases, particularly in rapid transmission scenarios.
Innovation Solution
The use of specific oligonucleotide sets for recombinase-polymerase amplification and detection, comprising amplification and probe oligonucleotides with at least 70% similarity to provided sequences, facilitates rapid and accurate amplification and detection of SARS-CoV-2 nucleic acid sequences in various samples, including nasal swabs, saliva, and blood, using recombinase-polymerase amplification technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional detection methods are used, then the detection process is simpler, but the detection speed and accuracy are reduced
Solution Approach 1:
The assay is divided into distinct functional modules: separate oligonucleotide sets for different SARS-CoV-2 genomic regions, distinct amplification and detection components, and modular reaction mixtures. This segmentation allows parallel processing of multiple targets simultaneously, improving detection speed while maintaining manageable complexity through organized modularity.
Solution Approach 2:
The assay employs pre-designed oligonucleotide sets with predetermined sequences complementary to specific SARS-CoV-2 regions. These pre-configured reagents are prepared in advance with optimal concentrations and configurations, eliminating the need for complex real-time optimization during detection and enabling rapid deployment for immediate diagnosis.
2Measurement precision
If conventional amplification methods are used, then the assay is easier to perform, but the sensitivity and specificity are reduced
Solution Approach 1:
The assay utilizes isothermal amplification conditions at constant temperature (37-42°C) rather than conventional PCR cycling, fundamentally changing the thermal parameters to simplify operation. This parameter change maintains high sensitivity and specificity through optimized oligonucleotide binding conditions while eliminating complex temperature cycling equipment and procedures.
Solution Approach 2:
The assay employs probe oligonucleotides as intermediaries that specifically bind to amplified SARS-CoV-2 sequences and generate detectable signals. These probe intermediaries enhance measurement precision by providing sequence-specific detection that distinguishes true positives from non-specific amplification, while the signal amplification mechanism maintains ease of operation through simple readout procedures.
3Adaptability or versatility
If single-target detection is used, then the assay is simpler, but the ability to detect multiple variants is reduced
Solution Approach 1:
The assay employs multiple oligonucleotide sets that can simultaneously detect different SARS-CoV-2 variants and related coronaviruses. Each oligonucleotide set is designed with universal binding characteristics that accommodate sequence variations across variants, allowing a single assay platform to perform multiple detection functions without requiring separate assays for each variant.
Solution Approach 2:
The assay adds a sequence-specificity dimension by designing oligonucleotides that target conserved regions across variants while allowing for variant-specific differentiation. This dimensional approach to sequence design enables the assay to distinguish between variants based on subtle sequence differences while maintaining overall structural simplicity through standardized reaction conditions and readout methods.
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 rapid and accurate detection of SARS-CoV-2, reducing the time to diagnosis and minimizing false negatives, with high specificity and sensitivity across different viral strains, including emerging variants like B.1.1.7 and B.1.351.
Implementation Method 1
hybridizing one or more of the oligonucleotide probes to one or more amplified target SARS-CoV-2 nucleic acid sequences
Implementation Method 2
The probe oligonucleotide may comprise a detectable label (e.g., a fluorophore)
Data Source
AI summary
The present disclosure relates to materials and methods for amplifying and detecting 2019-CoV in a sample, comprising a variety of combinations of amplification oligonucleotides and oligonucleotide probes. The disclosure also relates to oligonucleotide sequences, kits, and methods for detecting COVID-19.