Bead Array Multiplexing for Label-Free MS Analyte Quantification

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Solution Overview

Problem

Existing bead-based assays face challenges in optimizing analyte binding capacity and developing label-free methods for multiplexed analysis of proteins and peptides using mass spectrometry, particularly in depleting specific analytes and detecting them effectively.

Innovation Solution

A bead array with individual reactive sites containing distinct capture agents in a specific ratio is used to bind multiple analytes, allowing for depletion of one analyte while retaining another, followed by mass spectrometry detection, and a controlled addition of MS matrix to microwells to prevent splattering.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single bead array is used to detect multiple analytes, then multiplexed measurement capability is improved, but the analyte binding capacity and depletion efficiency of individual beads deteriorates

Engineering Contradiction:

Improvemultiplexed measurement capabilityVSAvoidanalyte binding capacity

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The bead array is segmented into multiple individual beads, each capable of binding specific analytes. This segmentation allows simultaneous multiplexed measurement of multiple analytes while maintaining high binding capacity for each individual analyte on its dedicated bead, resolving the contradiction between versatility and precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each bead in the array is designed with universal functionality to bind its specific analyte with high affinity, while the entire array collectively provides multiplexed measurement capability. This multi-functionality at the bead level enables both high binding capacity and versatile measurement.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If label-free quantification methods are used, then assay simplicity is improved, but the difficulty of detecting and measuring analytes increases

Engineering Contradiction:

Improveassay simplicityVSAvoidanalyte detection difficulty

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The method replaces complex label-based quantification systems with a simplified label-free approach using mass spectrometry directly on bead-bound analytes. This substitution maintains assay simplicity while enabling precise detection through MS, resolving the contradiction between simplicity and detection difficulty.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The bead array serves as an intermediary that captures and concentrates analytes from the sample, making them accessible to mass spectrometry detection. This intermediary function simplifies the overall assay while enhancing detectability by pre-concentrating the analytes.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple distinct capture agents are present in each reactive site, then multiplexed analyte binding capability is improved, but the optimization of binding capacity for individual analytes deteriorates

Engineering Contradiction:

Improvemultiplexed analyte binding capabilityVSAvoidbinding capacity optimization

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Each bead in the array is engineered with specific local quality - unique capture agents optimized for particular analytes. This local optimization ensures high binding capacity for each analyte type while the overall array maintains multiplexed capability through the diversity of beads, resolving the contradiction between versatility and precision.

Inventive Principle:

Principle #3Local quality

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 accurate, multiplexed quantitative analysis of proteins and peptides by mass spectrometry, with improved analyte binding capacity and efficient detection, suitable for various biological samples and applications.

Implementation Method 1

depleting one or multiple analytes from the sample by incubating the sample with a bead array

Methodology Applied

Scientific EffectAffinity binding: Absorption (physical)

Implementation Method 2

The bead-captured analytes are subsequently measured by MS from individual reactive sites of the bead array

Methodology Applied

Scientific EffectMass spectrometry:

Implementation Method 3

continuously adding a solution that contains MS matrix to a liquid-filled microwell, such that a rate, at which the matrix solution is being added to the microwell, is substantially equivalent to a rate, at which the solvent of the matrix solution is escaping from the microwell via evaporation

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS12467930B2Multiplexed bead-based analytical assays

Publication Date: 2025.11.11 ADEPTRIX

AI summary

Methods for performing bead-based analytical assays for detecting changes in abundance of target analytes in biological samples are disclosed. In an embodiment, a method involves eluting bead-captured analytes from a bead array under conditions that preserve spatial localization of the eluted analytes.