Piezoelectric Nucleic Acid Sensor Mass Detection
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Solution Overview
Problem
Current nucleic acid detection methods, such as PCR and ELISA, face limitations including non-specific amplification and time-consuming processes, as well as reliance on selective antibodies and fluorescent signal amplification, which are background and matrix-dependent.
Innovation Solution
A method utilizing a piezoelectric crystal or microbalance sensor with a probe nucleic acid immobilized on its surface, where the target nucleic acid forms a hybrid, and changes in mass are detected to indicate presence, with optional elongation or binding of additional nucleic acids or antibodies to enhance signal amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PCR technology is used to amplify trace amounts of DNA or RNA, then detection sensitivity is improved, but detection time increases significantly (20-40 cycles required)
Solution Approach 1:
The patent extracts the amplification step from the detection process by using direct mass measurement of nucleic acid hybrids on piezoelectric sensors. Instead of requiring PCR amplification cycles, the method directly detects the mass change when target nucleic acid binds to probe nucleic acid on the sensor surface, eliminating the time-consuming amplification phase while maintaining detection sensitivity through direct molecular interaction measurement.
Solution Approach 2:
The patent replaces the biochemical amplification mechanism (PCR) with a physical detection mechanism (piezoelectric mass measurement). By using the mass-sensitive piezoelectric crystal to directly measure the binding event between probe and target nucleic acids, the system substitutes chemical amplification with physical signal detection, achieving rapid detection without multiple amplification cycles.
2Measurement precision
If fluorescent signal amplification is used in ELISA-based serological tests, then detection sensitivity is improved, but background interference and matrix effects increase
Solution Approach 1:
The patent replaces optical detection (fluorescence) with mechanical/physical detection (piezoelectric mass measurement). By measuring the actual mass change on the sensor surface when nucleic acid targets bind to probes, the system eliminates the need for fluorescent labels and signal amplification chemistry, thereby removing the source of background interference and matrix effects that plague fluorescent-based ELISA methods.
Solution Approach 2:
The patent extracts and removes the fluorescent labeling and signal amplification components from the detection system. By using direct mass measurement of the nucleic acid hybrid itself on the piezoelectric sensor, the method eliminates the need for external fluorescent tags and complex signal amplification reagents, thereby eliminating the associated background noise and matrix interference.
3Measurement precision
If selective antibodies are used in ELISA tests, then detection specificity is improved, but the method becomes background and matrix dependent
Solution Approach 1:
The patent replaces antibody-based biochemical recognition with direct nucleic acid hybridization detected by piezoelectric mass measurement. By measuring the physical mass of the hybridized nucleic acid complex directly on the sensor surface, the system achieves specificity through complementary base pairing while eliminating dependence on antibody quality and matrix conditions that affect immunological assays.
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 rapid and specific detection of nucleic acids, improving sensitivity and reducing the time required for detection, while minimizing background interference and matrix effects.
Implementation Method 1
providing a first probe nucleic acid immobilized to the surface of a piezoelectric crystal or microbalance sensor; detecting a change in mass of the sensor wherein a change in mass of the sensor indicates the presence of the target
Data Source
AI summary
The invention relates to novel methods and systems for detection and quantification of nucleic acids.