Establishment of Sample-to-Answer Loop-Mediated Isothermal Amplification-Based Nucleic Acid Testing Using the...

Area of Science:

• Biotechnology
• Molecular Diagnostics
• Point-of-Care Testing

Background:

• Traditional diagnostics require lab settings, driving demand for Point-of-Care Tests (POCTs).
• Loop-mediated Isothermal Amplification (LAMP) is suitable for developing genetic POCTs due to device compatibility.
• Existing methods often involve complex procedures, specialized equipment, and significant time investment.

Purpose of the Study:

• To develop an integrated genetic test for bacterial identification minimizing complexity, handling, equipment, and time.
• To create a user-friendly POCT compatible with simplified devices and portable heating.
• To validate the test for bacterial identification using specific strains and optimized detection.

Main Methods:

• Developed a buffer for simultaneous bacterial DNA extraction compatible with LAMP and immunochromatographic tests.
• Adapted the LAMP protocol for the SPID device and optimized a lateral flow immunoassay for detection.
• Created a portable heating station for amplification and validated the integrated test with *Escherichia coli* strains.

Main Results:

• The integrated genetic POCT achieved 100% sensitivity and 85% specificity for bacterial identification.
• Results were available within 60 to 75 minutes, demonstrating rapid diagnostic capability.
• The developed system successfully integrated DNA extraction, LAMP amplification, and lateral flow detection.

Conclusions:

• The developed genetic POCT efficiently performs all steps for bacterial identification.
• The test's simplicity, cost-effectiveness, and portability facilitate implementation in diverse settings.
• This integrated approach addresses the need for accessible and rapid genetic diagnostics outside traditional laboratories.