Aptamer-Based Oral Endotoxin Detection via SELEX
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Solution Overview
Problem
Current point-of-care tests for gingivitis and periodontitis lack sensitivity, accuracy, and consistency in detecting specific bacterial species and endotoxins, particularly for Porphyromonas gingivalis and Prevotella pallens, leading to subjective clinical assessments and variability in treatment effectiveness.
Innovation Solution
Development of aptamer compositions comprising oligonucleotides with high binding affinity for Porphyromonas gingivalis and Prevotella pallens, used in assays to detect endotoxins and outer membrane vesicles in oral samples, employing SELEX methods for aptamer selection and integration with reporter molecules for quantitative analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current point-of-care tests are used for detecting bacterial species and endotoxins, then the testing process is simple and quick, but the sensitivity and accuracy are insufficient leading to subjective clinical assessments
Solution Approach 1:
The patent introduces aptamers as intermediary molecules that specifically bind to target bacteria (Porphyromonas gingivalis and Prevotella pallens) and their endotoxins. These aptamers serve as mediators between the sample and the detection system, enabling highly specific and sensitive detection through their unique binding properties, thus resolving the contradiction between detection accuracy and assay complexity
Solution Approach 2:
The patent employs SELEX (Systematic Evolution of Ligands by Exponential Enrichment) to optimize aptamer sequences, systematically changing nucleotide parameters to maximize binding affinity and specificity. This parameter optimization process enables the aptamers to achieve high detection sensitivity and accuracy while maintaining a relatively simple assay format
2Reliability
If conventional detection methods are used, then the assessment process is straightforward, but human variability leads to inconsistent results
Solution Approach 1:
The patent replaces subjective human clinical assessment with an objective aptamer-based detection system. The aptamers provide consistent, reproducible binding to target molecules, eliminating human variability in diagnosis. The assay produces quantifiable results that are independent of operator subjectivity, thus improving reliability while maintaining ease of operation through a standardized protocol
3Measurement precision
If aptamer-based detection is implemented, then detection sensitivity and accuracy improve, but the assay development and selection process becomes more complex
Solution Approach 1:
The patent performs preliminary aptamer selection and optimization through SELEX before final assay development. High-affinity aptamers are pre-selected and characterized for binding to specific bacterial targets and endotoxins. This preliminary work establishes a robust foundation that simplifies subsequent assay development and manufacturing, resolving the contradiction between detection sensitivity and ease of manufacture
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 aptamer-based method provides sensitive, accurate, and consistent detection of specific bacterial species and endotoxins, reducing human variability and enhancing the objective assessment of gingivitis severity and treatment efficacy.
Implementation Method 1
aptamer compositions comprising oligonucleotides with high binding affinity for Porphyromonas gingivalis and Prevotella pallens
Data Source
AI summary
The present invention is directed to an aptamer composition comprising at least one oligonucleotide consisting of: deoxyribonucleotides, ribonucleotides, derivatives of deoxyribonucleotides, derivatives of ribonucleotides, and mixtures thereof; wherein said aptamer composition has a binding affinity for one or more bacterial species from the genera Prevotella and Porphyromonas.