Polymer Reaction Composition for Nucleic Acid Amplification Repeatability
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Solution Overview
Problem
Nucleic acid amplification qualitative tests face low repeatability, especially when targeting nucleic acids at extremely low concentrations, with existing methods like the hot start method and primer sequence design being insufficient.
Innovation Solution
A reaction composition containing water and polymers selected from group A, specifically 2-(meth)acryloyloxyethylphosphorylcholine or copolymers with (meth)acrylic acid, at concentrations of 0.005 to 0.5 w/v %, is used to improve the repeatability of nucleic acid amplification methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional PCR methods are used for nucleic acid amplification, then the amplification process can be performed, but repeatability is low especially at extremely low concentrations
Solution Approach 1:
A carrier particle with a specific surface structure acts as an intermediary between the target nucleic acid and the amplification reagents. The carrier particle's surface selectively interacts with the target nucleic acid, concentrating it and preventing non-specific interactions that lead to poor repeatability. This intermediary structure enables reliable detection even at extremely low concentrations.
Solution Approach 2:
The carrier particle is designed with a specific surface structure that provides localized binding sites with enhanced affinity for the target nucleic acid. This local quality enhancement at the particle surface creates favorable microenvironment conditions that improve amplification efficiency and repeatability for low-concentration targets.
2Reliability
If hot start method is used to improve repeatability, then DNA polymerase is protected at room temperature, but repeatability remains insufficient
Solution Approach 1:
The carrier particle serves as a mediator that concentrates the target nucleic acid and facilitates its interaction with primers and polymerase. This intermediary function addresses the fundamental issue of low target concentration that hot start methodology alone cannot resolve, thereby achieving improved repeatability across all concentration ranges.
Solution Approach 2:
The invention introduces a physical parameter change by incorporating carrier particles with specific surface properties into the reaction system. This structural parameter modification creates localized concentration effects and interaction dynamics that differ from conventional homogeneous solutions, improving amplification reliability for low-concentration targets.
3Reliability
If primer sequence design is optimized to improve repeatability, then amplification efficiency may improve, but applicability to various test subjects is reduced
Solution Approach 1:
The carrier particle is designed with universal surface characteristics that can interact with diverse target nucleic acid sequences through non-specific adsorption mechanisms. This universal binding capability allows the same carrier particle system to be applied across various test subjects and applications without requiring customization, while still improving repeatability through localized concentration effects.
Data Source
AI summary
A method for improving repeatability of a nucleic acid amplification method is provided by the present invention, the method including performing a nucleic acid amplification reaction using a reaction composition containing water, an amplification target nucleic acid at a concentration of not more than 10,000 copies/mL, and one or more polymers selected from the following group A at a concentration of 0.005 to 0.5 w/v %:[group A](A1) a polymer consisting of a constitutional unit derived from 2-(meth)acryloyloxyethylphosphorylcholine(A2) a copolymer containing a constitutional unit derived from 2-(meth)acryloyloxyethylphosphorylcholine and a constitutional unit derived from (meth)acrylic acid.