A simple RNA preparation method for SARS-CoV-2 detection by RT-qPCR

Area of Science:

• Molecular Biology
• Virology
• Diagnostic Science

Background:

• Real-time quantitative polymerase chain reaction (RT-qPCR) is crucial for detecting SARS-CoV-2.
• RNA extraction is a critical pre-analytical step for RT-qPCR.
• COVID-19 pandemic has caused global shortages of commercial RNA extraction kits, particularly impacting developing nations.

Purpose of the Study:

• To develop and validate an alternative RNA extraction method using readily available laboratory reagents.
• To provide a cost-effective and accessible solution for SARS-CoV-2 RNA extraction.
• To ensure the continuity of diagnostic testing during reagent supply chain disruptions.

Main Methods:

• A novel RNA extraction protocol was developed using common molecular biology reagents.
• The method was optimized for processing nasopharyngeal swab samples.
• Extraction time was approximately 40 minutes for ten samples.

Main Results:

• The developed method yielded RT-qPCR results comparable to those obtained with commercial kits.
• The procedure demonstrated comparable efficiency and was not more laborious than commercial kits.
• The method is easily implementable in standard molecular diagnostic laboratories.

Conclusions:

• This alternative RNA extraction method provides a viable solution to overcome commercial kit shortages for SARS-CoV-2 detection.
• Its accessibility and comparable performance support its widespread adoption in diagnostic settings.
• Continued implementation can sustain essential viral RNA testing for public health and patient management.