Advances in Cas12a-Based Amplification-Free Nucleic Acid Detection.

Area of Science:

• Biomedical diagnostics
• Molecular biology
• CRISPR technology

Background:

• Nucleic acid detection is crucial for infectious disease diagnosis.
• Traditional methods require amplification, leading to long times, complexity, and false positives.
• CRISPR-Cas12a offers sensitive DNA target detection via trans-cleavage but often needs amplification.

Purpose of the Study:

• To review recent advancements in CRISPR-Cas12a-based amplification-free nucleic acid detection methods.
• To analyze the sensitivity, advantages, and disadvantages of various detection techniques.
• To discuss challenges and future potential in biomedical applications.

Main Methods:

• Review of electrochemical detection methods.
• Review of fluorescence detection methods.
• Review of noble metal nanomaterial detection methods.
• Review of lateral flow assay integration.

Main Results:

• Amplification-free CRISPR-Cas12a methods can achieve sensitivity comparable to amplified methods.
• Various detection strategies (electrochemical, fluorescence, nanomaterials, LFA) show promise.
• Optimization strategies enhance the performance of amplification-free detection.

Conclusions:

• CRISPR-Cas12a-based amplification-free nucleic acid detection is a promising technology.
• It offers potential for rapid, sensitive, and simplified diagnostics.
• Addressing off-target effects and high-throughput capabilities are key future challenges.