Digital Chromosome Counting for Decentralized NIPT Detection
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Solution Overview
Problem
Current non-invasive prenatal testing (NIPT) methods, such as next-generation sequencing and microarrays, are resource-intensive, costly, and confined to centralized laboratories, leading to delays in medical decision-making and limited accessibility.
Innovation Solution
Development of high-performance, multiplexed molecular diagnostic assays using digital ultraPCR technology that enables accurate detection of fetal aneuploidies with minimal infrastructure, allowing for decentralized implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If next-generation sequencing or microarrays are used for fetal aneuploidy screening, then measurement precision is improved, but device complexity and resource requirements increase
Solution Approach 1:
The patent employs disposable microarray chips that can be discarded after a single use, eliminating the need for complex cleaning and regeneration systems. These pre-fabricated chips integrate all necessary capture probes and spatial addressing patterns, allowing centralized laboratories to produce simple, low-cost testing units that can be deployed in decentralized settings without requiring maintenance of complex infrastructure.
Solution Approach 2:
The patent creates physical copies of genetic information through amplified DNA fragments that are hybridized to the microarray. By generating multiple copies of target sequences through PCR amplification before hybridization, the system enhances detection sensitivity and precision while using simple, widely-available laboratory equipment rather than complex sequencing infrastructure.
2Measurement precision
If next-generation sequencing is implemented, then measurement precision is improved, but loss of time increases due to multi-day workflows
Solution Approach 1:
The patent performs preliminary amplification of target DNA sequences using PCR before hybridization to the microarray. This pre-amplification step concentrates the fetal DNA signals and reduces the complexity of subsequent detection steps, allowing the entire assay to be completed in a single day rather than requiring multi-day sequencing workflows.
Solution Approach 2:
The patent replaces the complex mechanical and computational systems required for next-generation sequencing with a simpler hybridization-based detection system. The microarray uses optical detection of fluorescently-labeled DNA fragments bound to specific locations, eliminating the need for complex sequencing instruments, library preparation robots, and extensive bioinformatics processing.
3Measurement precision
If centralized laboratory model is used, then measurement precision is maintained, but productivity decreases due to limited accessibility
Solution Approach 1:
The patent segments the centralized testing model into decentralized point-of-care units. Each laboratory can independently perform complete NIPT workflows using standardized microarray chips and simple instrumentation, eliminating the bottleneck of centralized processing. This segmentation allows multiple laboratories to run parallel tests, dramatically increasing overall testing throughput and accessibility.
Solution Approach 2:
The patent designs a universal microarray platform that can detect multiple chromosomal abnormalities simultaneously using a single chip design. The microarray includes spatially-addressed capture probes for different chromosomes and aneuploidy types, allowing one instrument to perform multiple diagnostic functions that would otherwise require separate specialized equipment in centralized laboratories.
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 detection of fetal aneuploidies with high resolution and reduced costs, facilitating widespread access to NIPT in local laboratories, thereby reducing turnaround times and enhancing medical decision-making.
Implementation Method 1
partitioning a sample into a set of partitions
Implementation Method 2
amplifying targets with materials for the amplification reaction, within the plurality of partitions
Implementation Method 3
generating the number of counts per chromosome upon detecting signals from the plurality of partitions
Data Source
AI summary
This disclosure provides for devices, methods, and systems for performing a non-invasive prenatal testing (NIPT) digital assay upon generating at least a large number of counts per chromosome for a set of chromosomes present in a sample, where performing the NIPT digital assay can include: distributing nucleic acids of the sample and materials for an amplification reaction across a plurality of partitions; amplifying the nucleic acids with the materials, within the plurality of partitions; and generating counts per chromosome upon detecting signals from the plurality of partitions. The inventions enable processing of samples for NIPT digital analyses and/or other digital analyses involving other loci of interest, with unprecedented partitioning, reaction, readout, and analytical performance.