A quick guide to evaluating prime editing efficiency in mammalian cells

Area of Science:

• Molecular Biology
• Genome Engineering
• Biotechnology

Background:

• Modeling diseases caused by mutations requires precise genetic modifications, such as base substitutions and indels.
• Prime editing (PE) technology enables targeted installation of base substitutions and small insertions/deletions (indels) in mammalian cells without requiring double-strand breaks or donor DNA templates.
• PE offers enhanced editing flexibility due to its guide RNA structure encoding editing information.

Purpose of the Study:

• To provide a guideline for applying prime editing (PE) technology.
• To establish an experimental framework for utilizing PE at a specific genomic locus.
• To demonstrate PE methodology using RUNX1 as a target gene in mammalian cells.

Main Methods:

• Development of a prime editing system for precise genome modification.
• Construction of prime editor plasmids targeting the RUNX1 gene.
• Transfection of prime editor plasmids into 293FT mammalian cells.
• Assessment of PE efficiency using next-generation sequencing.

Main Results:

• Successful demonstration of prime editing methodology at the RUNX1 locus.
• Quantification of PE-mediated genome editing efficiency in mammalian cells.
• Validation of PE as a precise genome editing tool.

Conclusions:

• Prime editing provides a versatile and precise method for installing genetic variations without inducing double-strand breaks.
• The provided experimental framework facilitates the application of PE for targeted genome editing.
• PE technology holds significant potential for disease modeling and therapeutic applications.