Molecular Beacon F3L PCR Assay for Specific Monkeypox Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current assays for detecting monkeypox virus (MPXV) lack specificity and often result in cross-reactions with other pox viruses, necessitating the need for a sensitive and accurate method that can differentiate MPXV without false positives.
Innovation Solution
A molecular beacon-based F3L real-time PCR assay and a combined MPX-F3L and MPX-HA assay are developed, utilizing single nucleotide mismatch recognition to ensure specific detection of MPXV, accompanied by a test kit containing specialized primers and probes to minimize cross-reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a non-variola Orthopoxvirus (NVO) real-time PCR diagnostic test is used, then monkeypox detection is facilitated, but the test does not differentiate monkeypox virus from other NVOs causing cross-reactions
Solution Approach 1:
The patent applies local quality by designing primers and probes with specific nucleotide sequences that match unique regions of the monkeypox virus genome. The F3L and HA gene regions were selected because they contain sequence variations that distinguish monkeypox from other orthopoxviruses. By targeting these specific local regions with customized primers (e.g., F3L-F, F3L-R) and probes (e.g., F3L-MB, HA-MB), the assay achieves high specificity while maintaining rapid detection capability.
Solution Approach 2:
The patent segments the detection system into multiple independent assays targeting different gene regions (F3L and HA). Each assay uses separate primers and probes designed to detect specific viral genes. This segmentation allows the system to detect monkeypox virus through multiple independent pathways, reducing the likelihood of cross-reactions with other poxviruses while maintaining high sensitivity and specificity.
2Reliability
If PCR-based molecular testing is used for diagnosis, then detection capability is provided, but cross-reactions with other pox viruses occur
Solution Approach 1:
The patent applies parameter changes by optimizing the thermal cycling conditions and probe design parameters to enhance specificity. The molecular beacon probes are designed with specific melting temperatures and fluorescence characteristics that allow differentiation between monkeypox and other poxviruses. By adjusting annealing temperatures and probe concentrations, the assay achieves reliable detection while minimizing cross-reactions with other orthopoxviruses such as vaccinia and cowpox.
3Measurement precision
If a detection assay is developed to differentiate MPXV from other pox viruses, then specificity is improved, but assay complexity increases
Solution Approach 1:
The patent applies universality by developing a multi-functional detection system that can identify both monkeypox virus and other orthopoxviruses using a unified platform. The F3L and HA gene assays can detect various poxviruses, with the ability to differentiate between monkeypox and other NVOs through specific primer-probe combinations. This universal approach allows a single assay system to serve multiple diagnostic purposes, reducing overall system complexity while maintaining high specificity for monkeypox detection.
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
The assays provide highly specific and sensitive real-time detection of MPXV, avoiding cross-reactions with other pox viruses, with a linear quantification range and low detection limits, enabling early detection before symptom onset.
Implementation Method 1
a newly created, molecular beacon (MB) based F3L real-time PCR assay, taking advantage of the single nucleotide mismatch (SNP) recognition feature of MBs
Implementation Method 2
This assay is composed of a forward primer, a reverse primer generating a 110-bp amplicon, and a F3L MB probe for MPX-specific detection
Implementation Method 3
the following monkeypox specific real-time PCR assays can be used as a sensitive and accurate tool for monkeypox diagnosis
Implementation Method 4
taking advantage of the single nucleotide mismatch (SNP) recognition feature of MBs
Data Source
AI summary
Disclosed are an assay, method, and kit for detecting a monkeypox virus (MPXV) and the application thereof. The assay may be used alone or in combination with another assay or assays. The method of using and kit includes a composition used for detecting MPXV, wherein the composition is composed of a primer pair and a probe. The primer pair is composed of two single-stranded protein molecules shown in the first sequence and, the second sequence in a sequence list, and the sequence of the probe is the third sequence in the sequence list. The kit is used for detecting MPXV, and has advantages of providing real-time screening of MPXV reducing cross-reaction to other pox diseases, and increasing specificity to MPXV for disease prevention and improvement of public health.