LAMP Primer Set with Autonomy Primers for GC-Rich Target Detection
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Solution Overview
Problem
Existing LAMP primer designs face limitations in improving detection sensitivity due to restricted space for additional primers, especially when targeting nucleic acids with high GC content or strong secondary structures, necessitating reaction optimization that is often inefficient.
Innovation Solution
Introduce autonomy primers that target regions beyond the conventional LAMP primer set (F3 to B3) to enhance detection sensitivity, allowing for unrestricted design and improved accessibility of templates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional primers are introduced to improve detection sensitivity, then detection sensitivity is improved, but the available design space is limited by the conventional F3-B3 region
Solution Approach 1:
The patent extends the primer design from the conventional F3-B3 region to include autonomy primers targeting regions beyond F3 (such as F4, F5) and B3 (such as B4, B5). This spatial extension into new genomic regions provides additional design freedom while maintaining the core LAMP amplification mechanism, thereby resolving the contradiction between improving detection sensitivity and maintaining design versatility.
2Measurement precision
If reaction temperature is optimized to denature high GC content targets, then detection sensitivity is improved, but reaction conditions become more complex
Solution Approach 1:
The patent extracts the denaturation function from the thermal cycling process by introducing autonomy primers that create single-stranded templates through autonomous displacement. This separates the template preparation step from the amplification step, eliminating the need for complex thermal optimization while maintaining high detection sensitivity for GC-rich targets.
3Measurement precision
If primer concentration is increased to improve sensitivity, then detection sensitivity is improved, but non-specific amplification increases
Solution Approach 1:
The patent segments the amplification process into distinct functional components: autonomy primers that generate single-stranded templates and F3-B3 primers that perform specific amplification. This functional segmentation allows each primer set to operate at optimized concentrations for its specific role, improving overall detection sensitivity while maintaining specificity through the coordinated action of segmented primer functions.
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
The autonomy primers significantly increase detection sensitivity and reaction efficiency by displacing amplicons, providing single-stranded templates for the LAMP primers, resulting in higher detection rates and earlier detection times, without compromising specificity.
Implementation Method 1
The primers F3 and B3 are displacement primers whose amplification will displace amplicons generated by the primers FIP and BIP
Implementation Method 2
utilization of polymerases with strand-displacement activity, LAMP takes place at constant temperatures
Implementation Method 3
the primer FIP includes oligonucleotides targeting the regions F1C and F2, and the primer BIP includes oligonucleotides targeting the regions B1C and B2
Data Source
AI summary
A LAMP primer set includes original LAMP primers of FIP, BIP, F3, and B3, and at least one autonomy primer. The original LAMP primers target regions F3, F2, F1C, B1C, B2, and B3 on nucleic acids, and the regions F3, F2, F1, B1C, B2C and B 3 C are located in order from 5′ end to 3′ end of a forward strand of the nucleic acids. The primer FIP includes oligonucleotides targeting F1C and F2, and the primer BIP includes oligonucleotides targeting B1C and B2. The at least one autonomy primer targets a region located beyond a region from F3 to B3.