A versatile reporter system for multiplexed screening of effective epigenome editors

Area of Science:

• Epigenetics and Molecular Biology
• Genomic Regulation
• Cellular Differentiation

Background:

• Multicellular organisms rely on differential gene expression for specialized cell and tissue formation.
• Epigenetic modifications are crucial for controlling DNA accessibility and gene expression.
• Epigenetic aberrations are increasingly linked to various pathologies, highlighting the need for precise epigenome editing tools.

Purpose of the Study:

• To provide a detailed protocol for identifying and selecting designer epigenome modifiers (DEMs).
• To enable precise and selective targeting of specific genomic loci for gene expression control.
• To facilitate multiplex epigenome editing for simultaneous regulation of multiple genes.

Main Methods:

• Development of a streamlined protocol for generating and selecting functional DEMs.
• Utilizing a multicolor reporter cell line to assess DEM efficiency and specificity.
• Implementing a four-stage protocol guiding users through reporter cell line generation and DEM selection.
• Demonstrating multiplexed regulation of up to three genes.

Main Results:

• A detailed protocol is provided for identifying DEMs that efficiently and selectively inactivate target gene expression.
• The protocol supports the multiplexed regulation of up to three genes.
• The procedure duration ranges from approximately 6 weeks for single-gene editing to 13 weeks for multiplexed fine-tuning.

Conclusions:

• This protocol offers a valuable resource for researchers seeking to explore epigenome editing technologies.
• The described methods facilitate the identification of precise and efficient DEMs for therapeutic and research applications.
• The ability to perform multiplexed epigenome editing expands the potential applications of this technology in biomedical research.