Solid-Support RPA for Monoclonal Nucleic Acid Amplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing nucleic acid sequencing methods face challenges in generating monoclonal populations for high-throughput analysis due to polyclonal contamination and insufficient amplification, leading to complex data interpretation and inefficiencies.
Innovation Solution
A method involving pre-seeding and templating reactions using recombinase-polymerase amplification (RPA) to generate and confine monoclonal nucleic acid populations on solid supports, followed by isothermal amplification to produce multiple copies, ensuring high-quality sequencing reads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If recombinase-polymerase amplification (RPA) is used to amplify template nucleic acid molecules prior to sequencing, then the quantity of nucleic acid is increased, but polyclonal contamination occurs and monoclonality is compromised
Solution Approach 1:
The amplification process is divided into two distinct stages: a pre-seeding stage that generates initial amplicons, and a templating stage that generates monoclonal populations. This segmentation allows the first stage to focus on quantity generation while the second stage ensures monoclonality, resolving the contradiction between increasing nucleic acid quantity and maintaining monoclonality.
Solution Approach 2:
A pre-seeding amplification step is performed before the main templating amplification. This preliminary action creates the conditions necessary for subsequent monoclonal amplification by first establishing the template structure, thereby enabling the second stage to produce pure monoclonal populations without significant polyclonal contamination.
2Reliability
If traditional amplification methods are used, then monoclonal populations can be generated, but the process is time-consuming and expensive
Solution Approach 1:
The patent employs continuous isothermal amplification using RPA, which eliminates the need for thermal cycling steps. This continuous action at constant temperature significantly reduces the time required compared to traditional PCR methods, thereby increasing productivity while maintaining monoclonality through the two-stage process.
Solution Approach 2:
The method changes the temperature parameter from variable (thermal cycling) to constant (isothermal), enabling faster and more efficient amplification. This parameter change allows the reaction to proceed continuously without the energy input requirements of repeated heating and cooling cycles, improving throughput and reducing costs.
3Quantity of substance
If polyclonal populations are present in sequencing samples, then more nucleic acid material is available, but data interpretation becomes complex and less accurate
Solution Approach 1:
The patent extracts and isolates the template nucleic acid molecules from the complex reaction mixture through the templating stage, which selectively amplifies only the desired monoclonal populations. This extraction process removes polyclonal contaminants while retaining the target sequences, thereby improving sequencing data accuracy without losing nucleic acid material.
Solution Approach 2:
The method creates multiple copies of the template nucleic acid through the two-stage amplification process, generating sufficient material for sequencing while maintaining sequence homogeneity. The copying process in the templating stage ensures that all copies are identical to the original template, eliminating the data interpretation complexities caused by polyclonal diversity.
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 enhances high-throughput sequencing by increasing the number of high-quality reads, reducing duplicate and non-informative reads, and improving sequencing efficiency and accuracy.
Implementation Method 1
utilizes enzymes to bind oligonucleotide primers to their complementary partners in duplex DNA
Implementation Method 2
recombinase-polymerase amplification (RPA), which is a DNA amplification process that utilizes enzymes to bind oligonucleotide primers to their complementary partners
Data Source
AI summary
The present disclosure provides methods, compositions and kits as well as systems for manipulating nucleic acids, including implementing isothermal amplification, such as recombinase-polymerase amplification (RPA), of a nucleic acid template using a pre-seeded solid support. Provided are rapid and efficient methods for generating template nucleic acid molecules comprising specific nucleotide sequence bound to solid support. Such methods can be used, for example, in manipulating nucleic acids in preparation for analysis methods that utilize monoclonal populations of nucleic acids.