Mycoplasma Genitalium Oligonucleotide Probes for Species-Specific Detection
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Solution Overview
Problem
Existing nucleic acid-based tests struggle to distinguish Mycoplasma genitalium from other Mycoplasma species due to their close sequence relationship, necessitating the need for sensitive and specific molecular assays that can be used independently or as confirmatory tests.
Innovation Solution
Development of oligonucleotide probes and hybridization probes with target-hybridizing sequences, non-nucleotide linkers, and detectable labels, such as chemiluminescent acridinium esters, specifically designed to detect Mycoplasma genitalium nucleic acids, while minimizing cross-reactivity with other Mycoplasma species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional nucleic acid-based tests are used to detect Mycoplasma species, then detection capability is achieved, but specificity deteriorates due to close sequence relationship between different Mycoplasma species
Solution Approach 1:
The patent applies local quality by designing probes that target specific local regions (variable regions) of the 16S rRNA gene where sequence differences between Mycoplasma species are most pronounced. By focusing detection on these discriminating local sequences rather than the entire gene, the probe achieves high specificity for M. genitalium while maintaining detection capability.
Solution Approach 2:
The patent employs parameter changes by optimizing probe characteristics including length (15-30 nucleotides), temperature conditions for hybridization, and chemical modifications to enhance specificity. These parameter adjustments allow the probe to distinguish M. genitalium from other Mycoplasma species by exploiting subtle sequence variations at controlled conditions.
2Measurement precision
If oligonucleotide probes with target-hybridizing sequences are designed to detect Mycoplasma genitalium, then specificity is improved, but sensitivity may deteriorate due to stringent hybridization requirements
Solution Approach 1:
The patent applies dynamics by creating probes with optimized melting temperatures and designing hybridization conditions that allow dynamic adjustment between stringency and sensitivity. The probe sequence and length are engineered to provide appropriate binding strength at specific temperatures, enabling detection of low-copy targets while maintaining specificity.
Solution Approach 2:
The patent uses composite materials by incorporating chemiluminescent labels (acridinium esters) attached to the oligonucleotide probe through non-nucleotide linkers. This composite structure combines the specific binding capability of the oligonucleotide with the high-sensitivity detection capability of chemiluminescent markers, achieving both specificity and sensitivity simultaneously.
3Reliability
If chemiluminescent labels such as acridinium esters are attached to oligonucleotide probes, then detection sensitivity is improved, but probe complexity increases
Solution Approach 1:
The patent employs an intermediary approach by using non-nucleotide linkers to connect the chemiluminescent acridinium ester labels to the oligonucleotide probe. These linkers serve as mediators that maintain the probe's hybridization capability while enabling the attachment of detection labels, thus adding sensitivity without significantly complicating the probe's core function.
Solution Approach 2:
The patent adopts disposable probe designs where chemiluminescently-labeled probes are used in single-use detection assays. The probes are designed for optimal performance in one-time use with chemiluminescent detection systems, eliminating the need for complex regeneration or reuse mechanisms while achieving high sensitivity 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 probes provide high sensitivity and specificity in detecting Mycoplasma genitalium, enabling accurate differentiation from other Mycoplasma species and facilitating reliable detection in various sample types, including swabs from genital, urethral, and respiratory tracts.
Implementation Method 1
an oligonucleotide probe includes a target-hybridizing sequence of bases allowing for substitution of RNA and DNA equivalent bases
Implementation Method 2
the detectable label includes a chemiluminescent label. For example, the chemiluminescent label can include an acridinium ester
Data Source
AI summary
The present disclosure relates to oligonucleotides useful for determining the presence of Mycoplasma genitalium in a test sample. The oligonucleotides of the present disclosure may be incorporated into hybridization assay probes, capture probes and amplification primers, and used in various combinations thereof.