5'-End Engineering of CRISPR/Cas12a Activators: A Versatile Platform for Multiple Biomarker Analysis and Clinical...

Area of Science:

• Molecular Biology
• Biotechnology
• Genetics

Background:

• CRISPR/Cas12a is a potent biosensing tool leveraging trans-cleavage activity.
• Limited understanding of CRISPR/Cas12a activation mechanisms restricts biosensor design and application.
• The 5'-end of the activator strand is crucial for CRISPR/Cas12a function.

Purpose of the Study:

• To elucidate the activation mechanisms of CRISPR/Cas12a.
• To investigate the impact of 5'-end modifications on activator strand function.
• To develop advanced CRISPR/Cas12a-based biosensors with enhanced capabilities.

Main Methods:

• Investigated CRISPR/Cas12a activation by engineering the 5'-end of the activator strand.
• Utilized a novel RESET effect involving hairpin or duplex formation.
• Developed and validated CRISPR/Cas12a biosensors for various biomarkers.

Main Results:

• Discovered that 5'-end engineering via the RESET effect can suppress CRISPR/Cas12a activation.
• Developed highly sensitive and selective CRISPR/Cas12a biosensors for microRNAs, small molecules, enzymes, and reactive oxygen species.
• Demonstrated successful application in live-cell imaging and distinguishing cancer tissues (miR-210 for RCC).

Conclusions:

• The study provides a deeper understanding of CRISPR/Cas12a activation mechanisms.
• The RESET effect offers a versatile strategy for designing robust CRISPR/Cas12a biosensors.
• Developed biosensors show significant potential for molecular diagnostics, cancer detection, and therapeutic monitoring.