Amplified Electrochemiluminescence Tags for Wide-Range Microarray Detection
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Solution Overview
Problem
Existing microarray systems struggle to simultaneously detect multiple analytes with varying concentrations due to limitations in electrochemiluminescence tagging, restricting detection to a narrow range of 4-5 orders of magnitude, and cannot effectively handle concentrations from ug/ml to fg/ml.
Innovation Solution
The use of amplified electrochemiluminescence (AECL) tags, comprising a metal chelate ester and tyramide moiety, in conjunction with horseradish peroxidase (HRP)-conjugated antibodies, allows for the formation of highly localized and detectable electrochemiluminescent signals by binding to tyrosine residues, enhancing detection sensitivity up to 1000-fold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional electrochemiluminescence tags are used, then the detection system is simple, but the dynamic range is limited to 4-5 orders of magnitude
Solution Approach 1:
The AECL tag employs a nested structure where multiple components are organized hierarchically: the core ECL molecule is encapsulated within a chelate complex, which is further nested within a tyramide-functionalized amplifier structure. This nested architecture enables signal amplification while maintaining a manageable overall complexity, resolving the contradiction between expanded dynamic range and increased device complexity.
Solution Approach 2:
The AECL tag integrates multiple functional components into a composite structure: an electrochemiluminescent core molecule, a chelate complex for metal coordination, and a tyramide moiety for peroxidase-mediated amplification. This composite material approach combines the advantages of each component to achieve extended dynamic range (6+ orders of magnitude) while distributing the complexity across specialized functional modules.
2Quantity of substance
If ELISA-based assays are used, then the assay format is simple, but the detection range is restricted to 4 orders of magnitude
Solution Approach 1:
The invention transforms the detection parameters by introducing amplified electrochemiluminescence tags that change the signal generation mechanism. The AECL tags enable detection across 6+ orders of magnitude by modifying the luminescence parameters through electrochemical amplification, extending the conventional ELISA detection range without fundamentally altering the sandwich assay format.
Solution Approach 2:
The AECL tag serves as an intermediary between the detection ligand and the signal detection system. This intermediary component bridges the gap between conventional ELISA simplicity and extended dynamic range by providing a convertible signal amplification mechanism that can be integrated into existing assay formats without requiring complete system redesign.
3Measurement precision
If conventional ECL tags are used, then the tagging process is simple, but the detection sensitivity is limited
Solution Approach 1:
The AECL tag is pre-configured with all necessary components for amplified signal generation during the tagging step. The tyramide-functionalized chelate complex is prepared in advance with the ECL core molecule, enabling immediate signal amplification upon binding to the detection ligand-antigen complex. This preliminary preparation of the amplified tag structure enhances detection sensitivity while maintaining a streamlined tagging process.
Solution Approach 2:
The invention replaces conventional direct luminescence generation with an electrochemically-driven amplification mechanism. Instead of relying solely on direct electrochemical excitation of simple ECL tags, the system substitutes a multi-step electrochemical process that generates highly reactive intermediates, which then drive tyramide polymerization and ECL signal amplification, achieving 1000-fold sensitivity enhancement.
4Adaptability or versatility
If multiple analytes with varying concentrations are detected, then the comprehensiveness is improved, but the limitation on tags restricts detection to narrow concentration ranges
Solution Approach 1:
The AECL tag design provides universal applicability across multiple analyte detection scenarios. The standardized amplified tag structure can be coupled with various detection ligands (antibodies, aptamers) to detect different analytes while maintaining consistent amplification performance. This multi-functional capability enables simultaneous detection of multiple analytes with varying concentrations across 6+ orders of magnitude without requiring analyte-specific tag modifications.
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 the detection of target biomolecules at concentrations as low as 1 fg/mL with improved dynamic range, facilitating simultaneous detection of multiple analytes across six orders of magnitude.
Implementation Method 1
Electrochemiluminescence or electrogenerated chemiluminescence (ECL) is a kind of luminescence produced during electrochemical reactions in solutions
Implementation Method 2
ECL excitation can be caused by energetic electron transfer (redox) reactions of electrogenerated species
Implementation Method 3
contacting said immobilized target biomolecule with a detection ligand, said detection ligand capable of specifically binding to said immobilized target biomolecule and having peroxidase activity
Data Source
AI summary
Disclosed herein are formulations, substrates, and arrays. Also disclosed herein are methods for manufacturing and using the formulations, substrates, and arrays. Also disclosed are methods for identifying peptide sequences useful for diagnosis and treatment of disorders, and methods for using the peptide sequences for diagnosis and treatment of disorders, e.g., celiac disorder. In certain embodiments, substrates and arrays comprise a porous layer for synthesis and attachment of polymers or biomolecules.