Isothermal nucleic acid amplification and its uses in modern diagnostic technologies

Area of Science:

• Biotechnology
• Molecular Biology
• Diagnostics

Background:

• Nucleic acid amplification techniques (NAATs) are vital for pathogen detection, with Polymerase Chain Reaction (PCR) as a gold standard.
• Traditional PCR requires bulky equipment and high costs, limiting its use in developing countries.
• Isothermal amplification methods offer alternatives suitable for point-of-care (POC) diagnostics.

Purpose of the Study:

• To comprehensively review isothermal nucleic acid amplification methods.
• To analyze the advantages, disadvantages, and limitations of these techniques.
• To highlight their potential in pathogen detection and diagnostics.

Main Methods:

• Review of various isothermal amplification techniques including LAMP, NASBA, SDA, RCA, and RPA.
• Discussion of advanced methods like WGA, CPA, HDA, EXPAR, SMART, SPIA, and DAMP.
• Exploration of enzyme engineering and integration with technologies like CRISPR/Cas, microfluidics, and paper-based sensors.

Main Results:

• Isothermal methods are suitable for POC diagnostics, meeting WHO's ASSURED criteria.
• Numerous isothermal techniques offer improved accuracy and robustness.
• Integration with advanced technologies enhances biosensing and diagnostic capabilities.

Conclusions:

• Isothermal amplification methods provide portable and cost-effective solutions for pathogen detection.
• These techniques are crucial for improving food safety and enabling in situ diagnosis.
• Further development and integration promise significant advancements in molecular diagnostics.