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Related Experiment Video

Updated: Dec 21, 2025

Multiplexed Isothermal Amplification Based Diagnostic Platform to Detect Zika, Chikungunya, and Dengue 1
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Loop-Primer Endonuclease Cleavage-Loop-Mediated Isothermal Amplification Technology for Multiplex Pathogen Detection

Owen Higgins1, Terry J Smith1

  • 1Molecular Diagnostics Research Group, School of Natural Sciences, National University of Ireland, Galway, Ireland.

The Journal of Molecular Diagnostics : JMD
|May 16, 2020
PubMed
Summary

Loop-mediated isothermal amplification (LAMP) technology was enhanced with loop-primer endonuclease cleavage (LEC)-LAMP, enabling single-nucleotide polymorphism (SNP) identification and multiplex detection. This innovation offers precise infectious disease diagnostics, especially in resource-limited settings.

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Area of Science:

  • Molecular Biology
  • Diagnostic Technology
  • Isothermal Amplification

Background:

  • Loop-mediated isothermal amplification (LAMP) is valuable for infectious disease diagnostics in resource-limited settings due to its simplicity and cost-effectiveness.
  • Current LAMP methods face challenges in simultaneous multi-target detection and precise single-nucleotide polymorphism (SNP) identification.
  • Accurate SNP identification is crucial for understanding pathogen evolution and guiding treatment strategies.

Purpose of the Study:

  • To introduce and validate a novel LAMP-based technology, loop-primer endonuclease cleavage (LEC)-LAMP, for enhanced diagnostic capabilities.
  • To demonstrate the single-base specificity of LEC-LAMP for variable SNP identification.
  • To establish the utility of LEC-LAMP for both singleplex and multiplex pathogen detection.

Main Methods:

  • Development of a singleplex LEC-LAMP assay targeting Neisseria meningitidis, assessing analytical specificity and limit of detection.
  • Clinical validation of the Neisseria meningitidis LEC-LAMP assay using anonymized bacterial meningitis DNA extracts.
  • Modification of the LEC-LAMP assay for allele-specific SNP differentiation and multiplex detection of multiple bacterial targets.

Main Results:

  • The singleplex LEC-LAMP assay achieved complete analytical specificity and a low limit of detection (3.1 genome copies/reaction).
  • Clinical testing confirmed 100% diagnostic specificity and sensitivity for bacterial meningitis detection.
  • The assay successfully identified specific SNPs and differentiated wild-type and mutant alleles in a single tube.
  • Multiplex LEC-LAMP demonstrated simultaneous detection of Neisseria meningitidis, Streptococcus pneumoniae, and Hemophilus influenzae.

Conclusions:

  • LEC-LAMP represents a significant advancement in LAMP technology, offering single-base specificity for SNP identification.
  • This novel method enables single-tube, real-time, multiplex detection of multiple pathogens.
  • LEC-LAMP holds great promise for improving infectious disease diagnostics, particularly in resource-limited regions.