Nanopore Array Calibration for Gene Polymorphism Detection
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Solution Overview
Problem
Current nanopore technologies face challenges in efficiently calibrating 3D nanopore array systems for rapid and accurate detection of gene polymorphisms, which are essential for early disease diagnosis, due to complex calibration requirements and the need for efficient classification of large amounts of biopolymer-related raw data.
Innovation Solution
A method for calibrating nanofluidic devices with multiple nanopore channels and nanoelectrodes, involving selective voltage application, biasing voltage tuning, and data comparison to generate and analyze calibration data sets, coupled with temperature compensation and AI-based classification systems for efficient detection and classification of gene polymorphisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 3D nanopore array systems are used for detecting gene polymorphisms, then detection speed and accuracy are improved, but calibration complexity increases
Solution Approach 1:
The patent applies preliminary action by performing calibration before actual detection operations. The system calibrates nanopore channels and nanoelectrodes in advance using reference materials and establishes baseline current values, transfer characteristics, and noise parameters before sample analysis, ensuring accurate detection without increasing operational complexity
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors current signals from nanopore channels, compares them against calibrated baseline values and transfer characteristics, and adjusts measurements in real-time. This feedback loop compensates for variations in nanopore performance and maintains detection accuracy across the 3D array
2Reliability
If whole genome sequencing is performed, then comprehensive disease detection is achieved, but data processing time and complexity increase
Solution Approach 1:
The patent segments the genome sequencing process by detecting specific gene polymorphisms and polymorphic sites of interest rather than sequencing entire genomes. The 3D nanopore array can simultaneously analyze multiple genes or genomic regions in parallel, reducing data processing time while maintaining comprehensive detection of disease-related variations
Solution Approach 2:
The patent applies local quality by focusing detection resources on specific genomic regions with known disease associations. The system uses transfer characteristics and calibrated baseline values to identify and characterize polymorphisms in target genes, providing deep analysis of critical regions without the time cost of whole genome sequencing
3Measurement precision
If nanopore channels are selectively addressed and sensed, then detection specificity is improved, but device operation complexity increases
Solution Approach 1:
The patent implements dynamic control of nanopore channels through time-varying voltage applied to row and column select nanoelectrodes. The system dynamically switches between different nanopore channels in the 3D array based on the sample being analyzed, allowing selective addressing and sensing while maintaining a unified control interface that simplifies operation
Solution Approach 2:
The patent creates a universal control and sensing system where a single set of row and column select nanoelectrodes can address any nanopore channel in the 3D array. The same hardware infrastructure serves multiple functions: channel selection, current sensing, calibration, and data acquisition, reducing operational complexity through multi-functionality
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 rapid, accurate, and efficient detection and classification of gene polymorphisms, facilitating early disease diagnosis by optimizing nanopore array systems for tag-free, label-free, and amplification-free sequencing, reducing the complexity of whole genome sequencing and improving data processing efficiency.
Implementation Method 1
A nanopore is a small hole (e.g., with a diameter of about 1 nm to about 100 nm) that can detect the flow of charged particles (e.g., ions, molecules, etc.) through the hole by the change in the ionic current
Implementation Method 2
Each of the nanopore channels in the array may be electrically addressable and senseable through corresponding row and column nanoelectrodes, respectively
Data Source
AI summary
A method of calibrating a nanofluidic device including a plurality of nanopore channels, a plurality of gating nanoelectrodes, and a plurality of sensing nanoelectrodes, includes applying a selecting voltage across a gating nanoelectrode of the plurality of gating nanoelectrodes to select a nanopore channel. The method also includes tuning the nanopore channel by applying a first biasing voltage across a sensing electrode of the plurality of sensing nanoelectrodes, and receiving a plurality of currents over a plurality of frequencies. The method further includes generating a calibration data set from the pluralities of frequencies and currents. Moreover, the method includes comparing the calibration data set with a reference data set. In addition, the method includes when the calibration data set differs from the reference data set by more than a predetermined threshold, repeating the method with a second biasing voltage different from the first biasing voltage.