LAMP Primer Design for Hybridization Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting LAMP-amplified products face challenges due to inhibition of hybridization reactions by unreacted primers, leading to reduced efficiency and accuracy, particularly in real-time detection and high-sensitivity applications.
Innovation Solution
Designing primers for LAMP methods that minimize overlapping regions between detection sequences and primer sequences, ensuring unoverlapping regions of at least 10 bases and overlapping regions of 10 bases or less, to prevent hybridization inhibition and improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LAMP primers are used for amplification, then amplification efficiency is maintained, but hybridization efficiency decreases due to primer competition with probe
Solution Approach 1:
The detection region (FP/BPc) is extracted and separated from the primer binding regions (F1/F2/B1/B2), placing it in the loop primer binding region instead. This extraction removes the harmful overlap between primer sequences and detection sequences, eliminating the competition between primers and probe during hybridization while preserving amplification functionality.
Solution Approach 2:
The detection function is relocated from the traditional primer binding regions to the loop primer binding region, representing a dimensional reorganization of functional elements. This spatial reassignment in the primer structure allows simultaneous optimization of both amplification and detection functions without mutual interference.
2Measurement precision
If detection region overlaps with primer regions, then primer binding is facilitated, but detection accuracy decreases due to hybridization inhibition
Solution Approach 1:
The primer structure is segmented into distinct functional regions: F3 primer for initial binding, F1/F2 and B1/B2 for amplification, and FP/BPc for detection. By segregating these functions into non-overlapping segments, the design achieves high detection accuracy while maintaining manageable complexity through clear functional separation.
Solution Approach 2:
Different regions of the primer are assigned specialized qualities: F3/B3 primers provide binding capability, F1/F2/B1/B2 provide amplification capability, and FP/BPc provide detection capability. This local differentiation of functional qualities allows each region to optimize its specific function without compromising overall performance.
3Measurement precision
If probe hybridization is performed on double-stranded PCR products, then amplification detection is achieved, but sensitivity decreases due to competitor inhibition
Solution Approach 1:
The LAMP amplification method performs preliminary strand displacement during the amplification phase, generating single-stranded loop regions before detection. This preliminary action of creating accessible single-stranded detection regions eliminates the need for additional denaturation steps and removes complementary chain inhibition, enabling highly sensitive probe hybridization.
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 hybridization efficiency and detection accuracy by reducing the impact of unreacted primers, allowing for more precise and efficient detection of target nucleic acids, even in challenging conditions like real-time detection.
Implementation Method 1
the amplification product is amplified from a target nucleic acid with the primers, on the presupposition that the probe represents a probe nucleic acid comprising a nucleotide sequence complementary to a sequence selected from the group consisting of the sequence in the FP and BPc region
Data Source
AI summary
Kits for use in a method of detecting an amplification product by hybridizing it with a probe, the amplification product is amplified from a target nucleic acid with the primers, including placing F3, F2 and F1 regions in this order from a 5′ terminal side and B3c, B2c and B1c regions in this order from a 3′ terminal side, and additionally an FP region in the region from the F2 to F1 regions and/or a BPc region in the region from the B2c to B1c regions in the target nucleic acid, determining the respective regions in such a manner that the FP and F2 regions and/or the BPc and B2c regions have an unoverlapping region of at least 10 bases or more and overlapping regions of 10 bases or less, and designing the primers according to the regions.