DNA Nanotechnology Biomarker Sensor Platform
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Solution Overview
Problem
Current aptamer-based sensors face challenges in achieving specificity, sensitivity, and stability for a wide range of chemical analytes, necessitating a more robust DNA-based sensor technology for biomarker measurement.
Innovation Solution
A DNA nanotechnology-based biomarker measurement platform utilizing engineered DNA nanostructures with a DNA switch mechanism, featuring a nucleic acid core, helix strands, and reporter particles that change electrical potential upon analyte binding, enabling sensitive and specific detection and amplification of chemical analytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aptamer-based sensors are used for biomarker measurement, then measurement capability is provided, but specificity, sensitivity, and stability are insufficient
Solution Approach 1:
The patent replaces aptamer-based recognition mechanisms with a DNA nanotechnology platform that uses DNA strand displacement and hybridization dynamics. The DNA switch mechanism provides superior specificity through sequence-complementarity recognition and enhanced sensitivity through amplification via multiple particle strands competing for binding sites on the nucleic acid core.
Solution Approach 2:
The patent utilizes changes in electrical potential as a readout parameter to detect analyte binding. The reporter particles alter the electrical potential of the analysis substrate when bound, enabling sensitive detection through electrical measurements. This parameter change approach enhances measurement precision and reliability.
2Measurement precision
If DNA strand displacement is used to amplify signal, then sensitivity is improved, but device complexity increases
Solution Approach 1:
The nucleic acid core serves multiple functions simultaneously: it acts as the recognition element for analyte binding, provides the scaffold for multiple particle strands, and enables signal amplification through strand displacement. This multi-functionality reduces the need for separate components, managing complexity while achieving high sensitivity.
Solution Approach 2:
The particle strands are nested within the DNA nanostructure framework, with multiple strands positioned around the nucleic acid core. This nested arrangement allows compact integration of multiple sensing elements within a single nanostructure, reducing overall device complexity.
3Quantity of substance
If reporter particles are used to detect analyte binding, then signal amplification is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The DNA nanostructure framework self-assembles with particle strands through complementary base pairing, automatically positioning reporter particles at correct locations. This self-assembly mechanism eliminates the need for precise manual placement or complex fabrication processes, reducing manufacturing precision requirements while maintaining signal amplification.
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
The platform provides high sensitivity, specificity, and reproducibility for biomarker measurements, with tunable gain elements and in situ calibration, exceeding conventional technologies in clinical diagnostics and other applications.
Implementation Method 1
a particle strand hybridized to the surface strand in an absence of a chemical analyte that preferentially hybridizes to the exchange region as compared with the particle strand
Implementation Method 2
a reporter particle attached to the particle strand and disposed proximate to the analysis substrate when the particle strand is hybridized to the surface strand in absence of the chemical analyte and that changes the electrical potential of the analysis substrate depending on whether the particle strand is hybridized to the surface strand
Data Source
AI summary
A biomarker signal amplifier amplifies chemical analyte binding and includes: a surface strand disposed on an analysis substrate and including an exchange region; a particle strand hybridized to the surface strand in an absence of a chemical analyte that preferentially hybridizes to the exchange region as compared with the particle strand, and the particle strand is dissociated from the surface strand when the surface strand is in a presence of the chemical analyte; and a reporter particle attached to the particle strand and disposed proximate to the analysis substrate when the particle strand is hybridized to the surface strand in absence of the chemical analyte and that changes the electrical potential of the analysis substrate depending on whether the particle strand is hybridized to the surface strand.