Functionalized Co₂FeAl Nanoparticles for Detection of SARS CoV-2 Based on Reverse Transcriptase Loop-Mediated...

Area of Science:

• Molecular Biology
• Nanotechnology
• Infectious Disease Diagnostics

Background:

• Loop-mediated isothermal amplification (LAMP) is a rapid nucleic acid amplification method.
• LAMP assays, particularly RT-LAMP, are prone to false positives from carry-over contamination.
• Accurate and rapid detection of SARS-CoV-2 remains a global health priority.

Purpose of the Study:

• To develop a rapid nano-capture system to eliminate false positives in RT-LAMP assays.
• To improve the accuracy and reliability of SARS-CoV-2 detection using RT-LAMP.
• To present a novel nano-based cleaning strategy for isothermal amplification techniques.

Main Methods:

• Designed probe-functionalized magnetic nanoparticles (Co2FeAl) for contaminant capture.
• Integrated a 10-minute nano-capture system with a modified RT-LAMP assay.
• Compared the nano-capture method's efficacy against other contaminant elimination approaches.

Main Results:

• The nano-cleaned RT-LAMP assay detected 10 copies of SARS-CoV-2 with zero false positives.
• The nano-capture system demonstrated superior effectiveness in eliminating contaminants compared to other methods.
• Successfully validated the rapid and highly specific detection of SARS-CoV-2.

Conclusions:

• A novel nano-capture system effectively removes carry-over amplicons, preventing false positives in RT-LAMP.
• This method offers a reliable and rapid solution for SARS-CoV-2 diagnosis, addressing a critical global health challenge.
• This represents the first nano-based cleaning strategy for reliable isothermal amplification-based diagnostics.