Immiscible Discrete-Volume PCR Sequencing With Minimal Reagent Waste
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Solution Overview
Problem
Existing nucleic acid analysis methods, such as standard sequencing reactions, are time-consuming and wasteful due to the use of large sample and reagent volumes, particularly in cloning DNA fragments and performing sequencing reactions.
Innovation Solution
The use of immiscible-fluid-discrete-volumes, such as aqueous slugs and emulsified droplets, separated by non-aqueous spacing fluids in conduits, allows for efficient processing of small volumes, enabling PCR amplification and sequencing in microliter-sized volumes, with methods for amplifying and detecting nucleic acids directly in these discrete volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If standard sequencing reactions are performed in conventional formats, then sequencing can be accomplished, but large sample and reagent volumes are used resulting in waste and increased time consumption
Solution Approach 1:
The invention segments the continuous reaction medium into discrete droplets, each containing minimal volumes of sample and reagents. This segmentation allows parallel processing of multiple reactions in a single well, reducing overall reagent consumption and enabling high-throughput sequencing without requiring large volumes of materials for each individual reaction.
2Reliability
If large volumes of sample and reagents are used in conventional sequencing, then complete reactions can be performed, but time is wasted and resources are depleted
Solution Approach 1:
The invention maintains continuous useful action by performing multiple sequencing reactions simultaneously in parallel within the same physical space (a single well). Different droplets containing different DNA fragments undergo sequencing reactions concurrently, eliminating the sequential time loss associated with traditional methods while ensuring each reaction completes reliably with sufficient reagent volumes within each droplet.
3Ease of manufacture
If conventional sequencing methods are used, then standard protocols can be followed, but large volumes of reagents are consumed and processing time increases
Solution Approach 1:
The invention transitions from a two-dimensional conventional well format to a three-dimensional droplet-based system. By suspending multiple discrete droplets within a single well, the system adds a vertical dimension to reaction organization, allowing numerous independent reactions to occupy the same footprint area. This dimensional change enables standard protocols to be adapted without requiring large reagent volumes, as each droplet contains only the minimal necessary amount.
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 reduces waste and time by enabling efficient PCR amplification and sequencing in small volumes, facilitating processes like DNA hybridization and antibody-antigen binding assays, and supports applications like genotyping and directed medical sequencing.
Implementation Method 1
discrete volumes of an aqueous liquid, spaced-apart from one another by a spacing fluid that is immiscible with the immiscible-fluid-discrete-volumes
Data Source
AI summary
Various embodiments of the teachings relate to a system or method for sample preparation or analysis in biochemical or molecular biology procedures. The sample preparation can involve small volume processed in discrete portions or segments or slugs, herein referred to as discrete volumes. A molecular biology procedure can be nucleic acid analysis. Nucleic acid analysis can be an integrated DNA amplification/DNA sequencing procedure.