Loop-Mediated Isothermal Amplification (LAMP): The Better Sibling of PCR?

Area of Science:

• Molecular Biology
• Biotechnology
• Diagnostics

Background:

• Polymerase Chain Reaction (PCR) was a popular DNA amplification technique before 1998.
• Eiken Chemical Co., Ltd. developed Loop-mediated Isothermal Amplification (LAMP) in 1998.
• LAMP offers advantages over traditional methods like PCR.

Purpose of the Study:

• To highlight the usefulness and effectiveness of LAMP.
• To compare LAMP with PCR, emphasizing LAMP's superiority.
• To present Reverse Transcription LAMP (RT-LAMP) as a rapid diagnostic tool for SARS-CoV-2.

Main Methods:

• LAMP utilizes 2-3 pairs of primers (internal, external, loop) recognizing up to 8 specific DNA/RNA locations.
• Employs Bst DNA polymerase with high strand displacement activity, eliminating the DNA denaturation step.
• Conducts amplification at a stable temperature (e.g., dry block heater, incubator).

Main Results:

• Achieves up to 10^9 copies of amplified DNA in less than an hour.
• Demonstrates high specificity due to primer design targeting multiple locations.
• Enables rapid detection of amplification products, sometimes by naked eye observation.

Conclusions:

• LAMP is a highly efficient and specific DNA amplification method.
• Its isothermal nature and rapid detection offer significant advantages over PCR.
• RT-LAMP shows promise as a fast and effective diagnostic tool, particularly for viral detection like SARS-CoV-2.