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Targeted Control of Gene Expression Using CRISPR-Associated Endoribonucleases
Sagar J Parikh1, Heather M Terron1, Luke A Burgard1,2
1Institute for Memory Impairments and Neurological Disorders, University of California, Irvine, CA 92697, USA.
Cells
|April 11, 2025
Summary
We developed DREDGE, a new gene regulation method using CRISPR-Cas12a to precisely control gene expression. This direct repeat-enabled downregulation of gene expression offers highly selective and reversible gene silencing.
Area of Science:
- Molecular Biology
- Gene Regulation
- CRISPR Technology
Background:
- CRISPR-associated endoribonucleases (Cas RNases) offer sequence-specific RNA cleavage.
- Direct repeats (DRs) are key recognition sites for Cas RNases.
Purpose of the Study:
- To investigate the use of Cas RNases for gene expression regulation.
- To develop a novel method, DREDGE, for targeted gene downregulation.
Main Methods:
- Screening of five Cas RNases, identifying dCas12a as most efficient.
- Implementing DREDGE in doxycycline-regulatable systems.
- Testing DREDGE on fluorescent proteins and an endogenous gene.
Main Results:
- DREDGE achieved up to 90% gene downregulation with rapid onset.
- The method demonstrated high selectivity and full reversibility.
- Successful endogenous gene regulation was achieved, including a one-step CRISPR-Cas integration.
Conclusions:
- DREDGE is an effective tool for targeted, selective, and reversible gene expression control.
- This technology presents advantages over existing gene regulation methods.
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