Composite Microarray with Mass Spectrometry Detection
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Solution Overview
Problem
Current bead-based microarray assays are limited by the need to measure analytes while they are still bound to microbeads, restricting the range of analytical methods that can be used, particularly as most readout methods rely on optical detection, which lacks the multiplexing capability of mass spectrometry.
Innovation Solution
A composite microarray is developed with a three-dimensional solid support and reactive microbeads positioned in spatially distinct locations, allowing analytes to be released from the microbeads and transferred to analytical sites for analysis by mass spectrometry or other methods, enabling label-free detection and multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bead-based microarray assays use optical detection methods, then the assay can be performed with current technologies, but the multiplexing capability is limited compared to mass spectrometry
Solution Approach 1:
The patent introduces mass spectrometry as an intermediary analytical method between the bead-based microarray and the detection system. Instead of using direct optical detection on bead-bound analytes, the system uses mass spectrometry to detect analytes after they are released from the beads, thereby enabling enhanced multiplexing capability while maintaining compatibility with existing bead array platforms
Solution Approach 2:
The patent replaces the optical detection mechanism with mass spectrometry detection. This substitution transitions from photon-based detection to mass-to-charge ratio-based detection, enabling the system to resolve hundreds of thousands of different mass channels compared to the limited optical detection channels, thereby significantly improving multiplexing capability
2Adaptability or versatility
If analytes are measured while bound to microbeads, then the assay follows conventional bead-based protocols, but the range of analytical methods is restricted
Solution Approach 1:
The patent extracts the analytes from the bead-bound state by introducing a release step where analytes are liberated from the microbeads. This extraction enables the analytes to be transferred to analytical sites where they can be detected by mass spectrometry or other analytical methods, thereby expanding the range of applicable analytical techniques beyond what is feasible with bead-bound analytes
Solution Approach 2:
The patent incorporates preliminary actions including analyte release from beads and transfer to analytical sites before final detection. These preparatory steps enable subsequent mass spectrometry analysis by ensuring analytes are in the appropriate state and location, thereby expanding analytical method options while maintaining structured assay procedures
3Measurement precision
If conventional optical detection is used, then the setup is straightforward, but sensitivity and information on post-translational modifications are insufficient
Solution Approach 1:
The patent replaces optical detection with mass spectrometry detection, which provides superior sensitivity and the ability to detect post-translational modifications. Mass spectrometry measures mass-to-charge ratios with high precision, enabling detection of subtle molecular differences that optical methods cannot resolve, thereby significantly improving measurement precision
Solution Approach 2:
The patent introduces mass spectrometry as an intermediary detection system that bridges the bead-based microarray platform with high-precision analytical capabilities. This intermediary provides enhanced sensitivity and molecular characterization information while maintaining compatibility with existing microarray formats through the analyte release and transfer mechanism
Data Source
AI summary
Microarray compositions suitable for analysis by one or several spectrographic methods are disclosed. In an embodiment, a microarray composition includes a three-dimensional solid support and a plurality of reactive microbeads positioned on the solid support in spatially distinct and addressable locations.