Convective polymerase chain reaction in standard microtubes

Area of Science:

• Molecular Biology
• Biotechnology
• Virology

Background:

• Polymerase chain reaction (PCR) is a cornerstone technique for nucleic acid amplification.
• Reducing PCR duration is a key objective in molecular diagnostics and research.
• Convective PCR (cPCR) offers a potential avenue for accelerated amplification.

Purpose of the Study:

• To investigate and optimize nucleic acid amplification using convective PCR (cPCR).
• To determine optimal conditions for rapid and sensitive amplification in standard microtubes.
• To evaluate the efficacy of cPCR for detecting viral RNA, specifically SARS-CoV-2.

Main Methods:

• Utilized convective PCR (cPCR) in standard 0.2 ml polypropylene microtubes.
• Optimized reaction parameters including volume (70 μl), denaturation (145°C), annealing (0°C), microtube inclination (~30°), primer proximity, and reaction time (15-20 min).
• Assessed amplification product accumulation via gel electrophoresis and compared sensitivity to conventional PCR.

Main Results:

• Identified optimal conditions for cPCR, achieving amplification in 15-20 minutes.
• Generated sufficient amplification products for detection by gel electrophoresis.
• Demonstrated high sensitivity comparable to conventional PCR.
• Successfully detected SARS-CoV-2 RNA in nasopharyngeal swabs from COVID-19 patients.

Conclusions:

• Optimized cPCR provides a rapid and sensitive method for nucleic acid amplification.
• The developed cPCR protocol is effective for the reliable detection of SARS-CoV-2 RNA.
• cPCR presents a valuable tool for accelerating molecular diagnostic applications.