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Updated: May 15, 2025

A New Toolkit for Evaluating Gene Functions using Conditional Cas9 Stabilization
Published on: September 2, 2021
Conditional Control of CRISPR/Cas9 Function by Chemically Modified Oligonucleotides.
Liangliang Wang1,2, Yan Liu2, Hongjun Song2
1School of Biological and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
Chemically modified guide RNAs offer precise control over CRISPR gene editing. These innovations enhance precision and efficiency, paving the way for safer gene therapies and advanced functional genomics research.
Area of Science:
- Molecular Biology
- Biotechnology
- Chemical Biology
Background:
- CRISPR-Cas9 gene editing holds significant promise for therapeutic applications.
- Clinical translation is hindered by challenges in achieving precise spatiotemporal control and mitigating off-target effects.
Purpose of the Study:
- To review strategies for chemically modifying guide RNAs (gRNAs) to improve CRISPR-Cas9 editing.
- To explore methods for achieving precise spatiotemporal and dose-dependent regulation of gene editing.
Main Methods:
- Introduction of conditional responsive elements into oligonucleotides.
- Utilizing photosensitive groups, small-molecule responsive units, and supramolecular structures for gRNA regulation.
Main Results:
- Demonstrated precise spatiotemporal and dose-dependent control of CRISPR/Cas9 function through chemical modifications.
- Enhanced precision, efficiency, and controllability of gene editing processes.
Conclusions:
- Chemical modifications of gRNAs represent a powerful approach to overcome limitations in CRISPR/Cas9 technology.
- Future directions involve further advancements in chemical regulation for broader CRISPR applications.
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