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Updated: Nov 4, 2025

Selection-dependent and Independent Generation of CRISPR/Cas9-mediated Gene Knockouts in Mammalian Cells
Published on: June 16, 2017
Two Plasmid-Based Systems for CRISPR/Cas9 Mediated Knockout of Target Genes
Cai M Roberts1, Elena S Ratner2
1Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA. cai.roberts@yale.edu.
This study presents two plasmid-based CRISPR gene editing systems for efficient gene knockout in mammalian cells. These systems offer advantages like single-plasmid delivery and reduced off-target effects for versatile gene targeting.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- CRISPR/Cas9 gene editing enables targeted gene modification in mammalian cells.
- Existing CRISPR systems have various limitations in delivery and specificity.
Purpose of the Study:
- To describe two novel plasmid-based CRISPR/Cas9 systems for efficient gene knockout.
- To highlight the advantages of these systems over existing methods.
Main Methods:
- Development and implementation of two distinct plasmid-based CRISPR/Cas9 gene knockout systems.
- Utilizing selectable markers for efficient cell line selection.
- Strategies for optimizing knockout efficiency and minimizing off-target effects.
Main Results:
- The described systems allow for selective knockout of virtually any gene target.
- Single-plasmid delivery of all necessary CRISPR components is achieved.
- Multiple selectable markers and administration routes offer flexibility.
- The dual-system approach mitigates potential off-target effects.
Conclusions:
- These plasmid-based CRISPR systems provide a versatile and efficient tool for gene knockout in mammalian cells.
- The described methods facilitate optimized gene editing workflows and cell line selection.
- The systems offer enhanced control and specificity compared to other CRISPR-based approaches.
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