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Author Spotlight: Advancements in DNA Nanosensors – Addressing Sensitivity and Selectivity Challenges in Molecular Detection
Published on: February 9, 2024
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A Single-Tube, Single-Enzyme Clustered Regularly Interspaced Short Palindromic Repeats System (UNISON) with Internal
Jialing Zhong1,2, Xiaolong Wu1,2, Chuanghao Guo1,2
1Research Center for Nanosensor Molecular Diagnostic & Treatment Technology, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China.
Analytical Chemistry
|November 22, 2024
Summary
This study introduces a unified nucleic acid detection system (UNISON) for accurate CRISPR/Cas diagnostics. It establishes a novel internal control to overcome nonspecific cleavage, enhancing reliability in detecting viruses like hepatitis B.
Area of Science:
- Molecular diagnostics
- Biotechnology
- Nucleic acid detection
Background:
- CRISPR/Cas systems are used in molecular diagnostics but are prone to errors.
- Nonspecific Cas protein activity hinders the development of reliable internal controls.
- Accurate quantification of nucleic acids requires robust internal controls for clinical applications.
Purpose of the Study:
- To develop a unified, single-tube, one-enzyme system (UNISON) for accurate nucleic acid detection.
- To establish an effective internal control for CRISPR/Cas-based diagnostic systems.
- To improve the accuracy and reliability of CRISPR/Cas diagnostics, particularly for clinical virus detection.
Main Methods:
- Designed a novel CRISPR/Cas system (UNISON) with extended crRNA modified with fluorophores and quenchers.
- Engineered specific cleavage of target nucleic acids to generate a fluorescence signal.
- Integrated an internal control mechanism within the single-tube system.
Main Results:
- The UNISON system demonstrated specific cleavage of target nucleic acids, generating reliable fluorescence signals.
- Successfully established and validated an internal control for accurate nucleic acid detection.
- Achieved reliable detection of hepatitis B virus in clinical samples using the developed system.
Conclusions:
- The UNISON system with its integrated internal control enhances the accuracy and reliability of CRISPR/Cas-based diagnostics.
- This approach addresses the challenge of nonspecific Cas protein activity, paving the way for improved molecular diagnostic tools.
- The developed system shows significant potential for medical diagnostics and widespread virus monitoring applications.
