Fluorogenic Probe Analyte Detection via SiMREPS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting biomarkers lack sensitivity and specificity, particularly in differentiating between healthy and diseased states, and require improvements for rapid and accurate analysis.
Innovation Solution
The use of Single Molecule Recognition through Equilibrium Poisson Sampling (SiMREPS) with fluorogenic probes, where a detectable label and quencher form a ground-state stabilization complex, and a processor generates intensity-versus-time data to identify positive detection events, allowing for ultrasensitive detection of analytes by recording time-dependent changes in signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used, then the detection process is simple, but the sensitivity and specificity are insufficient
Solution Approach 1:
The detection system is segmented into multiple functional components: capture probes for analyte immobilization, fluorogenic query probes for specific recognition, and kinetic analysis modules for signal processing. This segmentation enables each component to specialize in one function, achieving high sensitivity through coordinated action while keeping individual components manageable in complexity
Solution Approach 2:
Fluorogenic probes serve as intermediaries between the analyte and the detection system. These probes contain fluorophores and quenchers that mediate signal generation through binding events, translating molecular recognition into measurable fluorescence changes without requiring direct interaction between the analyte and complex detection instrumentation
2Productivity
If fluorogenic probes with fast dissociation kinetics are used, then the detection speed increases, but the stability of the binding complex decreases
Solution Approach 1:
The system employs dynamic binding kinetics where probes are designed with specific dissociation rate constants (koff of 0.05-0.5 s⁻¹) that enable repeated association-dissociation cycles. This dynamic behavior allows rapid interrogation of analytes while maintaining sufficient binding stability for specific recognition, optimizing both detection speed and binding stability
Solution Approach 2:
The dissociation kinetics parameter is precisely controlled within a specific range (0.05-0.5 s⁻¹) to achieve optimal balance between speed and stability. This parameter optimization enables the probes to dissociate fast enough for rapid detection while maintaining stable enough binding for specific analyte recognition
3Adaptability or versatility
If single analyte detection is performed, then the detection method is simple, but the ability to multiplex is limited
Solution Approach 1:
The detection platform is designed with universal components that can detect multiple analyte types. Capture probes and query probes can be exchanged to detect different nucleic acid or protein targets using the same fundamental detection chemistry and instrumentation, enabling multiplexing without proportionally increasing system complexity
Solution Approach 2:
Different fluorophores with distinct emission wavelengths are incorporated into query probes for different analytes. This color-coding enables simultaneous detection of multiple analytes in the same sample through spectral differentiation, with each analyte-probe combination producing a characteristic fluorescence signal that can be independently monitored
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 ultrasensitive and specific detection of biomarkers with limits of detection in the attomolar to femtomolar range, providing rapid and accurate analysis of analytes, including nucleic acids and proteins, with the ability to distinguish between target and non-target analytes.
Implementation Method 1
the detectable label comprises a fluorescent moiety
Implementation Method 2
the quencher comprises a quenching moiety
Data Source
AI summary
Provided herein is technology relating to detecting analytes and particularly, but not exclusively, to methods, compositions, systems, and kits for detecting analytes using fluorogenic probes and multiplex technologies.