One-pot recombinase polymerase amplification and CRISPR/Cas12a assay for Cryptococcus neoformans

Area of Science:

• Mycology
• Molecular Biology
• Infectious Diseases

Background:

• Cryptococcus neoformans is an opportunistic fungal pathogen causing life-threatening central nervous system infections.
• Early detection of C. neoformans is crucial for reducing mortality rates and global health burdens.
• There is a significant need for rapid, sensitive, and specific diagnostic methods for C. neoformans.

Purpose of the Study:

• To develop a rapid, sensitive, and specific assay for the detection of Cryptococcus neoformans.
• To create a method suitable for point-of-care testing (POCT) in various environments.
• To provide a robust alternative for fungal pathogen identification.

Main Methods:

• A one-pot recombinase polymerase amplification (RPA) and CRISPR/Cas12a system was developed.
• The assay's performance was evaluated for sensitivity and specificity.
• Detection was assessed using real-time fluorescent PCR and lateral flow strips.

Main Results:

• The assay demonstrated high sensitivity, with a detection limit of 1 copy/µL for C. neoformans.
• No cross-reactivity was observed with other fungal strains, indicating high specificity.
• The assay is adaptable for use in harsh environments, requiring minimal complex equipment.

Conclusions:

• The developed RPA and CRISPR/Cas12a assay offers a rapid, sensitive, and specific method for C. neoformans detection.
• The assay's suitability for POCT makes it valuable for clinical diagnostics and public health.
• This innovative approach provides a foundation for developing diagnostic tools for other fungal pathogens.