Generation of Genomic Deletions in Mammalian Cell Lines via CRISPR/Cas9

Overview

This article describes a protocol for creating genomic deletions in mammalian cell lines using the CRISPR/Cas9 system. The method focuses on producing loss-of-function mutations through large deletions, which are more informative for studying genes and genetic elements.

Key Study Components

Area of Science

• Genetics
• Molecular Biology
• Cell Biology

Background

• CRISPR/Cas9 is a powerful tool for gene editing.
• Large deletions can provide clearer insights into gene function compared to smaller mutations.
• The method aims to simplify the screening process for deletion alleles.
• Electroporation is used to introduce CRISPR constructs into cells.

Purpose of Study

• To establish a reliable method for generating genomic deletions in mammalian cells.
• To enhance the efficiency of screening for deletion clones.
• To facilitate the study of gene function through loss-of-function mutations.

Methods Used

• Electroporation of CRISPR plasmids and a GFP reporter into mammalian cells.
• Fluorescence-activated cell sorting (FACS) to isolate GFP-positive cells.
• Limiting dilution to obtain single-cell clones.
• Conventional PCR to screen for deletion alleles.

Main Results

• Successful generation of bi-allelic deletion clones.
• Identification of deletion and non-deletion bands through PCR.
• Confirmation of gene expression loss in deletion clones.
• Demonstration of the method's efficiency and cost-effectiveness.

Conclusions

• The CRISPR/Cas9 system is effective for creating large genomic deletions.
• This method streamlines the process of generating and screening deletion alleles.
• It provides a valuable approach for studying gene function and non-coding elements.

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