Fluorescent Probe PCR for Protozoan Detection
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Solution Overview
Problem
Current methods for detecting pathogenic protozoa, particularly Protomyxzoa spp. and other newly discovered protozoans, lack effective detection tools due to the absence of serology or alternative methods, and existing PCR techniques face challenges in sensitivity and specificity, leading to false positives and inefficiencies in identifying these organisms.
Innovation Solution
Development of clinical assays using PCR methods with specific primers and fluorescently labeled probes, including multiplex quantitative real-time PCR, to amplify and detect DNA segments from pathogenic protozoa, providing a reproducible and sensitive means to identify these organisms by aligning oligonucleotide probes with genomic sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard PCR methods are used for detecting pathogenic protozoa, then the detection process is simple and widely applicable, but the sensitivity and specificity are insufficient leading to false positives
Solution Approach 1:
The patent modifies standard PCR by incorporating fluorescently labeled probes (such as TaqMan probes) that emit specific wavelengths of light when they hybridize to target DNA. This parameter change from simple DNA amplification to fluorescent signal detection significantly improves sensitivity and specificity while maintaining the ease of PCR operation. The fluorescent probes allow for real-time monitoring of amplification and specific identification of target sequences.
Solution Approach 2:
The patent introduces fluorescently labeled oligonucleotide probes as intermediaries between the PCR amplification process and the detection system. These probes act as mediators that specifically bind to target protozoan DNA sequences and generate detectable fluorescent signals, thereby enhancing the precision of detection without complicating the overall PCR workflow.
2Reliability
If serology or alternative detection methods are used for newly discovered protozoans, then detection may be achieved, but these methods do not exist for recently discovered species
Solution Approach 1:
The patent designs universal primer pairs that can amplify conserved regions of protozoan DNA across different species, including newly discovered ones. These universal primers work across multiple protozoan taxa, providing a versatile detection platform that adapts to newly discovered species without requiring species-specific reagents. The fluorescent probes can be customized for specific species while the PCR framework remains universally applicable.
3Reliability
If existing PCR techniques are used, then the method is established and reliable, but false positives occur and efficiency in identifying organisms is reduced
Solution Approach 1:
The patent replaces traditional end-point PCR detection methods (such as gel electrophoresis and visual staining) with real-time fluorescent detection. This substitution allows for continuous monitoring of amplification in real-time, providing quantitative data and eliminating the need for post-PCR processing steps. The fluorescent signals provide direct evidence of target presence, reducing false positives and improving identification efficiency.
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 proposed solution enables accurate and sensitive detection of pathogenic protozoa, reducing false positives and improving the ability to identify novel protozoan species, thereby aiding in the diagnosis of chronic and neurologic illnesses associated with these pathogens.
Implementation Method 1
the reaction mixture is capable of amplifying, by a polymerase chain reaction (PCR), a segment of the nucleic acid target to produce an amplicon
Implementation Method 2
detecting fluorescence from the oligonucleotide probe in the reaction mixture
Data Source
AI summary
Disclosed are compositions, kits, and methods for detecting, extracting, visualizing, and identifying a pathogenic protozoan. Quantitative real time polymerase chain reaction in connection with specifically designed oligonucleotide probes are used to detect a variety of pathogenic protozoans in patient samples.