Cas12aVDet: A CRISPR/Cas12a-Based Platform for Rapid and Visual Nucleic Acid Detection

Area of Science:

• Molecular Biology
• Biotechnology
• Nucleic Acid Detection

Background:

• Nucleic acid detection methods are essential for various applications.
• CRISPR/Cas12a systems offer promising nucleic acid detection capabilities.
• Current CRISPR/Cas12a methods are time-consuming (2 hours) and risk aerosol contamination due to separate steps and uncapping.

Purpose of the Study:

• To develop a rapid, sensitive, and contamination-free nucleic acid detection method.
• To integrate DNA amplification and Cas12a cleavage into a single reaction system.
• To improve upon existing CRISPR/Cas12a detection protocols.

Main Methods:

• Developed a novel CRISPR/Cas12a-based method named "Cas12aVDet".
• Integrated recombinase polymerase amplification (RPA) with Cas12a cleavage in a single reaction system.
• Utilized visual detection under blue light.

Main Results:

• Achieved nucleic acid detection within 30 minutes.
• Eliminated the need for uncapping, thus avoiding aerosol contamination.
• Demonstrated single-molecule DNA detection sensitivity.
• Showcased 100% accuracy in detecting mycoplasma contamination.

Conclusions:

• Cas12aVDet offers a significantly faster and safer alternative for nucleic acid detection.
• The integrated RPA-Cas12a system provides high sensitivity and accuracy.
• This method holds substantial potential for diverse nucleic acid detection applications.