Analog-Encoded Microcarriers for Multiplex Assay Identification
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Solution Overview
Problem
Existing multiplex assay systems face limitations in resolution due to constraints on digital barcode size and fluorophore resolution, leading to limited unique identifiers and increased recognition errors from batch-to-batch variations.
Innovation Solution
The development of encoded microcarriers with an analog code, featuring a substantially transparent polymer layer and a non-transparent polymer layer with a two-dimensional shape representing the code, along with a capture agent for analyte capture, allowing for nearly unlimited unique identifiers and reduced recognition errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital barcodes or fluorophores are used for encoding microcarriers, then unique identifiers can be provided, but the number of unique identifiers is limited and recognition errors increase due to batch-to-batch variations
Solution Approach 1:
The patent replaces optical/chemical encoding systems (digital barcodes and fluorophores) with a magnetic encoding system. Microcarriers are encoded with magnetic patterns that can be read by magnetic readers, eliminating the limitations of optical methods including batch-to-batch variation and limited identifier capacity. This substitution of the detection mechanism fundamentally resolves the reliability and precision contradictions.
2Adaptability or versatility
If more unique identifiers are needed, then the number of barcode digits must be increased, but this requires more space on the microbead surface
Solution Approach 1:
The patent transitions from two-dimensional barcode patterns on the microbead surface to three-dimensional magnetic encoding within the microbead structure. Magnetic patterns can be embedded throughout the volume of the microcarrier, allowing significantly more unique identifiers to be encoded without increasing the external surface area. This dimensional transition enables unlimited identifier capacity while maintaining compact microbead size.
3Productivity
If multiple capture agents are used in suspension array multiplex assays, then multiple analytes can be detected simultaneously, but the system complexity and manufacturing difficulty increase
Solution Approach 1:
The patent standardizes the microcarrier encoding system using magnetic patterns with defined parameters (pattern type, size, orientation, position) that can systematically represent multiple analytes. This parameter-based encoding approach simplifies the complexity of managing multiple capture agents by providing a unified, scalable identification system that can handle any number of analytes through systematic variation of magnetic pattern parameters rather than requiring fundamentally different encoding mechanisms for each analyte.
Data Source
AI summary
Provided herein are encoded microcarriers for analyte detection in multiplex assays. The microcarriers are encoded with an analog code for identification and include a capture agent for analyte detection. Also provided are methods of making the encoded microcarriers disclosed herein. Further provided are methods and kits for conducting a multiplex assay using the microcarriers described herein.