Molecular Beacons for Multiplex HPV Genotype Detection
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Solution Overview
Problem
Current HPV detection methods are inadequate for simultaneously identifying multiple HPV genotypes and determining their viral load, leading to inefficiencies in cervical cancer screening and diagnosis, particularly due to high sequence homology among HPV genomes causing specificity issues and limitations in detecting multiple genotypes in a single reaction.
Innovation Solution
A method utilizing real-time PCR with a set of molecular beacons, each with a stem structure and interacting labels, allows for the simultaneous detection and quantification of multiple HPV genotypes by hybridizing with specific sequences and altering signal detection, enabling the identification of HPV types and their presence in a single reaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional HPV detection methods are used, then detection can be performed, but multiple HPV genotypes cannot be simultaneously identified and their viral loads cannot be determined
Solution Approach 1:
The detection system is segmented into multiple molecular beacons, each specifically designed to detect a particular HPV genotype. Each beacon consists of a probe specific to one genotype paired with a common primer, allowing simultaneous detection of multiple genotypes in a single reaction without cross-interference
Solution Approach 2:
The invention creates a universal detection platform where a common primer can be used across multiple genotype-specific probes. This multi-functional system allows a single PCR reaction to simultaneously identify and quantify multiple HPV genotypes, transforming the detection capability from single-purpose to multi-purpose
2Reliability
If conventional detection methods are used, then detection can be performed, but specificity is reduced due to high sequence homology among HPV genomes
Solution Approach 1:
Each molecular beacon probe is designed with locally optimized sequence specificity targeting unique regions of individual HPV genotype genomes. The probes are carefully selected to match only their intended genotype while avoiding cross-hybridization with other genotypes, even those with high sequence homology. This local quality control ensures high specificity without requiring complex differentiation mechanisms
Solution Approach 2:
The invention introduces molecular beacons as intermediary detection elements that mediate between the HPV DNA target and the detection system. These beacons act as specific intermediaries that bind only to their complementary genotype sequences, providing a buffer that enhances specificity while simplifying the overall detection architecture
3Productivity
If multiple HPV genotypes are detected in a single reaction, then detection efficiency improves, but sensitivity and accuracy may be compromised
Solution Approach 1:
The invention uses PCR amplification to create multiple copies of the target HPV DNA sequences before detection. This copying step ensures that sufficient target material is available for all genotype-specific probes to bind simultaneously, maintaining sensitivity and quantification accuracy even when detecting multiple low-abundance genotypes in the same reaction
Solution Approach 2:
The detection system utilizes parameter changes in fluorescence signals to differentiate and quantify multiple HPV genotypes simultaneously. Each molecular beacon is labeled with fluorescent markers that emit at distinct wavelengths, allowing the system to resolve and measure multiple genotypes independently based on their unique spectral parameters, thereby maintaining precision while improving productivity
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 enhances the sensitivity and specificity of HPV detection, allowing for the accurate identification of multiple HPV genotypes and viral loads in a single reaction, improving the efficiency and reliability of cervical cancer screening.
Implementation Method 1
each of said probes comprises a sequence complementary to a sequence from pathogen flanked by four or five pairs of complementary bases
Implementation Method 2
said probe is labeled with a first interacting label and a second interacting label such that hybridizing of said probe to a nucleic acid from a pathogen causes a change in the signal detected
Data Source
AI summary
A method for detecting pathogens, particularly organisms associated with sexually transmitted diseases, especially Human papilloma virus genotypes is described. The method involves the use of real-time PCR using specially designed probes. The probes, kits for carrying out the method, and methods for designing primers suitable for use in the method of the invention are also described.