1. A new simplified sequence-dependent loop-mediated isothermal amplification (LAMP) detection method.
- Author
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Chen, Yanju, Zhu, Yuanyuan, Du, Jungang, Peng, Cheng, Wang, Xiaofu, Wu, Jian, Zhou, Qingli, Chen, Huan, and Xu, Junfeng
- Subjects
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DNA probes , *NUCLEIC acid amplification techniques , *GENE amplification , *VIBRIO parahaemolyticus , *SIGNAL processing , *DNA primers - Abstract
Fluorescence dye-based loop-mediated isothermal amplification (LAMP) is a sensitive nucleic acid detection method, but is limited to single-plex detection and may yield non-specific signals. In this study, we propose a bifunctional probe-based real-time LAMP amplification method for single-plexed or multiplexed detection. The bifunctional probe is derived by modifying the 5′ end of the fluorophore and an internal quencher on one of the LAMP primers; therefore, it can simultaneously be involved in the LAMP process and signal amplification. The fluorescence intensity undergoes a cumulative exponential increase during the incorporation of the bifunctional probe into double-stranded DNA amplicons. The bifunctional probe-based LAMP method is simplified and cost-effective, as the primer design and experimental operations align entirely with the ordinary LAMP. Different from other current probe-based methods, this method does not require additional enzymes, sequences, or special probe structures. Also, it is 10 min faster than several other probe-based LAMP methods. The bifunctional probe-based LAMP method allows the simultaneous detection of the target Vibrio parahaemolyticus DNA and the internal amplification control in a one-pot reaction, demonstrating its potential for multiplexed detection. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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