A cleavage-gated terminal exposure-driven CRISPR-RCA self-amplifying system for ultra-fast DNA detection
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View abstract on PubMed
Summary
This summary is machine-generated.A new CRISPR-based system, AURORA, offers ultra-fast and sensitive detection of monkeypox virus (MPXV). This innovative method overcomes enzyme competition for rapid, on-site infectious disease diagnostics.
Area Of Science
- Molecular Biology
- Biotechnology
- Infectious Disease Diagnostics
Background
- CRISPR-Cas systems combined with isothermal amplification offer advantages for on-site infectious disease detection over qPCR.
- Enzyme competition between Cas proteins and amplification enzymes limits signal amplification in current CRISPR-based methods.
Purpose Of The Study
- To develop a novel single-tube, self-amplifying system (AURORA) for ultra-fast and sensitive monkeypox virus (MPXV) detection.
- To overcome substrate competition between Cas12a and phi29 DNA polymerase for enhanced signal amplification.
Main Methods
- Developed a dual-function probe (DF probe) and a CRISPR-Cas12a/rolling circle amplification (RCA) system (AURORA).
- Utilized Cas12a trans-cleavage activity to expose the DF probe's 3' terminus, initiating target-primed RCA by phi29 DNA polymerase.
- Designed the system to prevent enzyme substrate competition within a single tube.
Main Results
- Achieved ultra-fast signal amplification of MPXV DNA within 8 minutes.
- Demonstrated a limit of detection (LOD) of 88 aM (53 copies/μL) for MPXV DNA.
- Obtained results consistent with qPCR when testing 36 clinical MPXV samples, with sample-to-answer time as low as 10 minutes.
Conclusions
- The AURORA system provides ultra-fast and precise detection of MPXV.
- This technology offers a more efficient tool for the prevention and control of severe infectious diseases.
- AURORA overcomes limitations of existing CRISPR-based detection methods, enhancing diagnostic capabilities.
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