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Author Spotlight: Advancing Pathogen Diagnostics with Standardized LAMP

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Published on: September 8, 2023

Comparative Evaluation and Quantitative Analysis of Loop-Mediated Isothermal Amplification Indicators.

Anchi T Scott¹, Tiffany R Layne¹, Killian C O'Connell¹

¹Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States.

Analytical Chemistry

|August 26, 2020

Summary

This summary is machine-generated.

Visual detection in Loop-mediated isothermal amplification (LAMP) using colorimetric indicators shows variability. Objective analysis is crucial due to individual perception biases, highlighting the need for standardized diagnostic methods.

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Area of Science:

Biotechnology
Molecular Diagnostics
Biochemistry

Background:

Loop-mediated isothermal amplification (LAMP) is a versatile molecular diagnostic technique.
Visual detection via colorimetric indicators is a key advantage of LAMP over traditional PCR.
A lack of comprehensive comparative studies on LAMP indicators hinders optimal diagnostic application.

Purpose of the Study:

To comparatively evaluate the performance of various visual indicators for LAMP.
To introduce an objective, ImageJ-based quantitative analysis method for LAMP detection.
To assess inter-reader variability in visual LAMP assessment.

Main Methods:

Evaluation of hydroxynaphthol blue, phenol red, calcein, leuco crystal violet, malachite green, and a fluorescent dye.
Development and application of an ImageJ-based quantitative analysis protocol.
An inter-reader variability study involving 24 participants.

Main Results:

Significant inaccuracies and variability were observed in visual assessment of LAMP indicators.
Individual perception and bias impact the reliability of visual detection methods.
No single indicator proved universally superior; applicability varies with context.

Conclusions:

Objective, quantitative analysis is essential for reliable LAMP diagnostics.
The choice of visual indicator requires careful consideration of sample preparation, storage, and workflow.
Standardized protocols are needed to overcome limitations in visual LAMP detection.