SERS Aptamer Substrate for Direct Pathogen Detection
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Solution Overview
Problem
Current methods for detecting analytes, such as those related to Lyme disease, face challenges including low sensitivity, complex assay procedures, and the inability to directly detect pathogens within the first few weeks of infection, particularly due to reliance on antibody detection rather than direct pathogen detection.
Innovation Solution
The use of surface-enhanced Raman scattering (SERS) technology with functionalized aptamers covalently or non-covalently attached to a SERS-active surface, featuring a Raman-active marker that generates a detectable signal upon binding of the analyte, allowing for direct detection of analytes without the need for complex sandwich assays or antibody-based methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If antibody-based detection methods are used, then detection can be performed, but sensitivity is low and the ability to directly detect pathogens is lost
Solution Approach 1:
The patent uses aptamers as intermediary molecules that directly bind to pathogen surfaces. These aptamers are attached to SERS-active substrates, serving as mediators between the pathogen and the detection system, enabling direct pathogen detection with high sensitivity without relying on antibody-based methods
Solution Approach 2:
The patent replaces traditional antibody-based immunological detection with a combination of aptamer binding and surface-enhanced Raman scattering (SERS) spectroscopy. This substitution provides direct molecular detection of pathogens with enhanced sensitivity and eliminates the limitations of antibody-based approaches
2Measurement precision
If complex sandwich assays are used, then detection can be performed, but assay complexity increases and detection time extends
Solution Approach 1:
The patent extracts and eliminates the complex sandwich assay format by using a direct binding approach. The aptamer is directly attached to the SERS-active substrate and binds directly to the target pathogen, removing the need for multiple reagents and complex procedural steps while maintaining detection accuracy
Solution Approach 2:
The SERS-active substrate serves multiple functions: it provides the platform for aptamer attachment, enhances the Raman signal for detection, and enables direct pathogen binding. This multi-functionality simplifies the overall assay design while maintaining high detection accuracy
3Measurement precision
If traditional detection methods are used, then detection can be performed, but detection time is extended beyond 30 minutes
Solution Approach 1:
The aptamers are pre-attached to the SERS-active substrate before sample addition, creating a ready-to-detect configuration. This preliminary preparation eliminates the need for complex assay setup and reagent addition steps during detection, enabling rapid results within 30 minutes while maintaining high diagnostic accuracy
Solution Approach 2:
The patent utilizes Raman spectral changes (analogous to color changes in optical detection) for rapid identification of pathogen presence. The SERS signal provides immediate spectral fingerprinting of the bound pathogen, enabling fast and accurate detection without prolonged incubation or multiple measurement steps
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 enables rapid, sensitive, and specific detection of analytes, including Borrelia species, with the ability to differentiate between infected and non-infected samples within 30 minutes, improving diagnostic accuracy and reducing the time to results.
Implementation Method 1
surface-enhanced Raman scattering (SERS) technology with functionalized aptamers covalently or non-covalently attached to a SERS-active surface, featuring a Raman-active marker that generates a detectable signal upon binding of the analyte
Data Source
AI summary
Provided herein are surface enhanced Raman scattering (SERS)-active reagents and methods for detecting one or more analyte in a sample. Said SERS-active reagents are adaptable, sensitive, and easy-to-use in the diagnosis of infectious diseases in a patient, or the detection of toxins, bacteria, viruses, pathogens, hormones, cytokines, antigens, antibodies or illicit drugs in a biological sample. Such methods may be handled by police, soldiers, or health care workers in the field, and do not require specialized training.