Lyophilized Reagent Microspheres for Single-Container DNA Library Prep
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Solution Overview
Problem
Current DNA library preparation protocols for next-generation sequencing are time-consuming and inefficient due to multiple steps, material transfers, and the use of expensive instruments, leading to potential DNA loss and inefficiencies.
Innovation Solution
The use of lyophilized microspheres or beads containing library preparation reagents that release their contents under predetermined conditions, allowing for a single-container workflow with reduced handling steps and improved stability, thereby minimizing DNA loss and enhancing user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional multi-step DNA library preparation protocols are used, then comprehensive reagent coverage is achieved, but the number of handling steps increases and DNA loss increases
Solution Approach 1:
The patent combines multiple separate reagent components (tagmentation reagents, extension-ligation reagents, PCR reagents, and poisoning reagents) into a single microsphere formulation. This merging eliminates the need for multiple separate handling steps and material transfers, thereby reducing DNA loss while maintaining comprehensive reagent coverage for the entire library preparation workflow.
Solution Approach 2:
The patent employs a nested microsphere structure where different reagent components are encapsulated within concentric shells. The first shell contains tagmentation reagents with embedded second shells containing extension-ligation reagents, which in turn contain third shells with PCR reagents and poisoning reagents. This nesting allows all reagents to be delivered in a single handling step while maintaining their functional separation and activity.
2Ease of operation
If multiple separate reagent containers are used, then reagent specificity is maintained, but the number of containers and handling steps increases
Solution Approach 1:
The patent uses nested microsphere shells to organize reagents by function while maintaining their specificity. Each shell contains specific reagents needed for particular workflow stages (tagmentation, extension-ligation, PCR), ensuring that reagents remain separated and specific until released at the appropriate time during the workflow, thus maintaining reliability while reducing container count.
Solution Approach 2:
The patent segments the reagent system into distinct functional modules within the microsphere structure. Different shells contain different reagent sets (tagmentation, extension-ligation, PCR, poisoning), allowing each reagent type to be specifically controlled and released at the appropriate workflow stage, maintaining reagent specificity while consolidating multiple containers into one.
3Stability of the object's composition
If reagents are stored in lyophilized form, then storage stability is improved, but the complexity of the formulation increases
Solution Approach 1:
The patent transforms liquid reagents into lyophilized (freeze-dried) form within the microsphere formulation. This parameter change from liquid to solid/lyophilized state significantly improves storage stability by preventing degradation, contamination, and volume changes. The lyophilized reagents are reconstituted in situ during the workflow, maintaining their activity while benefiting from enhanced stability during storage and transport.
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 the number of steps required for DNA library preparation, improves storage stability of reagents, and minimizes DNA loss during handling, resulting in an efficient and user-friendly process.
Implementation Method 1
The present disclosure provides compositions comprising a series of lyophilized substances, e.g., microspheres or beads, containing library preparation reagents that release their contents upon predetermined release conditions
Implementation Method 2
said first shell comprises a hydrophilic or hydrophobic polymer and has a first trigger release condition
Implementation Method 3
said first shell comprises a hydrophilic or hydrophobic polymer and has a first trigger release condition
Data Source
AI summary
The present disclosure relates, in general, to compositions for next generation sequencing and DNA library preparation, and systems and methods for use of the compositions in generating DNA libraries.