Optimized Loop-Mediated Isothermal Amplification (LAMP) Allows Single Copy Detection Using Bioluminescent Assay in...

Area of Science:

• Molecular diagnostics
• Biotechnology
• Biochemistry

Background:

• The bioluminescent assay in real time (BART) is a molecular diagnostic tool that detects nucleic acid amplification via light output.
• A key component of BART is a thermostable luciferase from the firefly Photinus pyralis.
• Combining BART with loop-mediated isothermal amplification (LAMP) offers rapid molecular diagnostics with simple equipment.

Purpose of the Study:

• To introduce a protocol for amplifying and detecting genetic markers using LAMP with BART.
• To provide optimization strategies for LAMP assays to enhance sensitivity and specificity.
• To address and eliminate false positive results in molecular assays.

Main Methods:

• Utilizing the bioluminescent assay in real time (BART) for light output detection.
• Employing loop-mediated isothermal amplification (LAMP) for isothermal nucleic acid amplification.
• Applying the LAMP-BART method to microliter and nanoliter microfluidic assays.
• Optimizing genetically modified (GM) maize detection by targeting specific genetic sequences (NOSt and 35Sp).

Main Results:

• Demonstration of a protocol for LAMP-BART assay implementation.
• Guidance on optimizing LAMP assays for improved sensitivity and specificity.
• Strategies for minimizing false positive results in molecular detection.
• Successful application of LAMP-BART for detecting specific genetic markers in GM maize.

Conclusions:

• LAMP-BART is a robust, quantitative, closed-tube molecular diagnostic method.
• The protocol and optimization advice facilitate sensitive and specific nucleic acid detection.
• This method is suitable for various assay volumes, including microfluidic applications.
• The approach is effective for identifying specific genetic sequences, such as those in GM maize.