Conditionally Activated Cross-Linked crRNAs for CRISPR/Cas12a Based Nucleic Acid Detection

Area of Science:

• Molecular Biology
• Biotechnology
• Biochemistry

Background:

• CRISPR/Cas12a systems offer sensitive nucleic acid detection but can interfere with amplification.
• Existing modified CRISPR/Cas12a systems require complex optimization and specialized configurations.

Purpose of the Study:

• To develop a universal, photochemically controlled strategy for CRISPR/Cas12a-based detection.
• To overcome limitations of existing methods, enabling rapid and versatile nucleic acid detection.

Main Methods:

• A polymeric crRNA was cross-linked with a photoresponsive cross-linker, inactivating CRISPR/Cas12a during amplification.
• Brief light exposure was used to cleave the cross-linker, releasing active crRNA for target detection.

Main Results:

• The strategy effectively controlled CRISPR/Cas12a activity, preventing interference with amplification processes.
• The method demonstrated versatility and suitability for rapid, on-site detection applications.

Conclusions:

• This universal photochemical strategy provides a simplified and effective approach for CRISPR/Cas12a-based nucleic acid detection.
• The technique is highly applicable for immediate detection of emerging sequences in pathogen detection, genetic screening, and point-of-care diagnostics.