Microfluidic Device Thermal Melt Curve Generation
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Solution Overview
Problem
Current methods for characterizing biological materials on microfluidic devices are limited in their ability to perform rapid binding assays with minimal use of compounds and reagents, particularly in determining thermal properties of biological molecules.
Innovation Solution
The development of methods and systems for conducting binding assays using molecular melt curves on microfluidic devices, where molecules are flowed through microchannels, heated, and detectable properties are measured to generate thermal property curves that quantify binding affinity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional calorimetric analysis methods are used to characterize binding between molecules, then binding affinity can be determined, but the process requires multiple separate manipulations and is time-consuming
Solution Approach 1:
The patent combines multiple separate manipulations (measuring, aliquotting, transferring, diluting, mixing, separating, detecting, incubating) into a single integrated microfluidic device that performs all operations simultaneously in one system, enabling rapid binding assays
Solution Approach 2:
The microfluidic device is designed to perform multiple functions within a single platform, including temperature control, fluorescence detection, and fluid handling, eliminating the need for multiple separate instruments and manipulations
2Quantity of substance
If conventional binding assay methods are used, then binding affinity can be measured, but a large number of compounds and reagents are required
Solution Approach 1:
The patent divides the binding assay into discrete microfluidic channels and compartments that can be independently controlled, allowing parallel processing of multiple compounds with minimal reagent consumption through precise fluid segmentation
Solution Approach 2:
The system replaces traditional bulk liquid handling with microfluidic technology that uses precise flow control and pressure differentials to deliver minimal volumes of reagents, reducing compound and reagent requirements while maintaining assay throughput
3Measurement precision
If thermal denaturation monitoring is performed to detect binding, then binding presence can be determined, but the process is complex and requires multiple measurements
Solution Approach 1:
The patent uses fluorescence emission changes (analogous to color changes) as a simple and direct indicator of thermal denaturation and binding events, where the fluorescence intensity or wavelength shifts provide clear, quantifiable signals that simplify the measurement process while maintaining high precision
Solution Approach 2:
The system automatically performs temperature control, fluorescence measurement, and data analysis without requiring manual intervention, with the microfluidic device self-regulating the thermal denaturation process and generating binding affinity calculations automatically from the fluorescence data
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
Enables rapid characterization of biological materials by generating thermal property curves that determine binding affinity with minimal reagents, applicable to various molecular interactions, including proteins, nucleic acids, and peptides, facilitating efficient analysis in pharmaceutical research and diagnostics.
Implementation Method 1
The molecules involved are then heated (and/or cooled) and a detectable property of the molecules is measured over a range of temperatures
Implementation Method 2
detecting a shift in the thermal denaturation of a molecule that occurs when another molecule is bound to it
Implementation Method 3
The shift in the thermal denaturation of a molecule (which could be as expressed in a molecular melt curve) can be monitored via the fluorescence of an indicator dye that binds to only select conformational states of the molecule
Data Source
Figure 1A~4A
Figure 2
Figure 3~4B
AI summary
The present invention provides novel methods and devices that employ microfluidic technology to generate molecular melt curves. In particular, the devices and methods in accordance with the invention are useful in providing for the analysis of PCR amplification products.