Microfluidic Droplet Sequencing by Hybridization
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Solution Overview
Problem
Current sequencing by hybridization techniques require large quantities of reagents and have low throughput, limiting their application in nucleic acid sequencing.
Innovation Solution
The method involves forming microfluidic droplets containing nucleic acid probes and identification elements, which are fused with droplets containing target nucleic acids, allowing for the determination of nucleic acid sequences through hybridization and identification of associated elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If sequencing by hybridization is performed using traditional methods, then nucleic acid sequences can be determined, but large quantities of reagents are required
Solution Approach 1:
The invention segments the sequencing process into individual microfluidic droplets, each containing a single target nucleic acid molecule and multiple probes. This segmentation reduces reagent consumption by isolating reactions in minute volumes while maintaining high throughput through parallel processing of multiple droplets simultaneously
Solution Approach 2:
The invention transitions from traditional two-dimensional substrate-based hybridization to three-dimensional microfluidic droplet-based hybridization. This dimensional change enables efficient mixing and interaction of reagents within droplets while allowing large numbers of droplets to be processed in parallel, thereby reducing overall reagent requirements and increasing throughput
2Productivity
If traditional sequencing by hybridization is used, then nucleic acid sequences can be determined, but throughput is relatively small
Solution Approach 1:
By dividing the sample into numerous individual microfluidic droplets, the system enables parallel processing of many nucleic acid targets simultaneously. Each droplet acts as an independent reaction chamber, allowing high-throughput sequencing while using minimal reagents per reaction
Solution Approach 2:
The invention changes the physical parameters of the reaction system by using microfluidic droplets with volumes in the picoliter to nanoliter range. This parameter change enables efficient diffusion and hybridization kinetics while reducing absolute reagent quantities, thereby increasing throughput without proportionally increasing reagent consumption
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 efficient sequencing with reduced reagent usage and increased throughput by utilizing microfluidic droplets to identify and determine nucleic acid sequences through hybridization and element association.
Implementation Method 1
Sequencing by hybridization (SBH) is an approach to DNA sequencing that has been recently developed. In sequencing by hybridization, a large set of single-stranded fragments or probes are attached to a substrate. A solution of labeled single-stranded target DNA fragments is exposed to the substrate. These fragments hybridize with the complementary fragments on the substrate
Data Source
AI summary
The present invention relates to systems and methods for sequencing nucleic acids, including sequencing nucleic acids in fluidic droplets. In one set of embodiments, the method employs sequencing by hybridization using droplets such as microfluidic droplets. In some embodiments, droplets are formed which include a target nucleic acid, a nucleic acid probe, and at least one identification element, such as a fluorescent particle. The nucleic acid probes that hybridize to the target nucleic acid are determined, in some instances, by determining the at least one identification element. The nucleic acid probes that hybridize to the target nucleic acid may be used to determine the sequence of the target nucleic acid. In certain instances, the microfluidic droplets are provided with reagents that modify the nucleic acid probe. In some cases, a droplet, such as those described above, is deformed such that the components of the droplets individually pass a target area.