AP65-1 Gene Amplification Assay for Specific Trichomonas Vaginalis Detection
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Solution Overview
Problem
Current diagnostic methods for Trichomonas vaginalis, such as wet mount and overnight culture, are less sensitive and not widely used, necessitating the development of more reliable and accurate techniques for detection.
Innovation Solution
The use of oligonucleotides targeting the highly conserved AP65-1 gene of Trichomonas vaginalis for nucleic acid amplification and detection, specifically through Strand Displacement Amplification (SDA) and Taqman® real-time PCR, to identify the presence of the organism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wet mount or overnight culture methods are used for diagnosis, then the diagnostic process is simple and widely accessible, but the sensitivity and accuracy of detection are insufficient
Solution Approach 1:
The patent replaces mechanical/optical detection methods (wet mount microscopy) and biological culture methods with molecular biology methods (PCR amplification and hybridization detection). This substitution enables detection at the nucleic acid level, dramatically improving sensitivity from detecting whole organisms to detecting specific gene sequences, even at very low concentrations.
Solution Approach 2:
The patent introduces oligonucleotide probes as intermediary molecules that specifically hybridize to the T. vaginalis AP65-1 gene sequence. These probes act as mediators between the target DNA and the detection system, enabling highly specific and sensitive detection through controlled hybridization reactions under defined buffer conditions.
2Reliability
If traditional diagnostic methods are used, then false positives may occur, but the methods lack specificity for accurate identification
Solution Approach 1:
The patent targets a specific local region (the AP65-1 gene sequence) of the T. vaginalis genome for detection. By designing oligonucleotide probes that are highly specific to this particular gene sequence, the method achieves high diagnostic reliability and specificity, distinguishing T. vaginalis from other organisms even in mixed samples.
Solution Approach 2:
The patent replaces non-specific or low-specificity detection methods with molecular hybridization-based detection. The use of sequence-specific oligonucleotide probes and PCR amplification provides highly specific identification of T. vaginalis, eliminating cross-reactivity issues associated with traditional methods and minimizing false positives.
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
Provides a highly sensitive and specific method for detecting Trichomonas vaginalis, minimizing false positives and enabling accurate diagnosis of the infection.
Implementation Method 1
The use of oligonucleotides targeting the highly conserved AP65-1 gene of Trichomonas vaginalis for nucleic acid amplification and detection
Implementation Method 2
Strand Displacement Amplification (SDA) and Taqman® real-time PCR
Data Source
AI summary
A region of the Trichomonas vaginalis AP65-1 gene has been identified which is useful for performing amplification assays to determine specifically whether T. vaginalis is present in the sample being tested. Oligonucleotides useful for performing thermal Strand Displacement Assay (tSDA) reactions on this gene are disclosed. The disclosed oligonucleotides can be used in an assay which is specific for multiple strains of T. vaginalis and which does not show cross reactivity with the genomes of other microorganisms or with human DNA.