Developing ABEmax-NG with Precise Targeting and Expanded Editing Scope to Model Pathogenic Splice Site Mutations...

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• RNA splicing is crucial for human health and implicated in numerous diseases.
• Current genetic tools for modulating RNA splicing have limitations in precision and scope.
• Base editors (BEs) offer a promising approach for RNA splicing modulation but require improvement.

Purpose of the Study:

• To develop a novel base editor with enhanced precision and scope for RNA splicing modulation.
• To overcome the limitations of existing BE-based tools for targeting splice sites.
• To enable precise genetic editing at splice sites for disease modeling and research.

Main Methods:

• Combination of SpCas9-NG and ABEmax to create the ABEmax-NG base editor.
• Demonstration of precise A⋅T to G⋅C conversion capabilities of ABEmax-NG.
• Application of ABEmax-NG for targeted editing at RNA splice sites in vitro and in vivo.

Main Results:

• ABEmax-NG exhibits precise A⋅T to G⋅C conversion with an expanded editing scope.
• The tool successfully achieved targeted editing exactly at splice sites.
• Pathogenic RNA splicing was effectively modeled in vitro and in vivo using ABEmax-NG.

Conclusions:

• ABEmax-NG is a versatile and precise tool for broad editing at splice sites.
• This advancement facilitates the study of RNA splicing in human diseases.
• The developed base editor offers new possibilities for genetic research and therapeutic strategies.