Investigation of Genetic Dependencies Using CRISPR-Cas9-based Competition Assays

Area of Science:

• Genetics
• Molecular Biology
• Cancer Research

Background:

• Gene perturbation studies are crucial for understanding acute myeloid leukemia (AML) pathogenesis.
• Traditional gene knockout models, while effective, can be complex and slow for large-scale gene analysis.
• Rapid and scalable methods are needed to accelerate the investigation of multiple candidate genes in AML.

Purpose of the Study:

• To develop a rapid and scalable assay for assessing the role of genes in AML cell proliferation and survival.
• To leverage CRISPR-Cas9 technology for efficient gene disruption in AML models.
• To facilitate the parallel interrogation of numerous candidate genes.

Main Methods:

• Utilized CRISPR-Cas9 gene-editing technology for targeted gene disruption.
• Developed a high-throughput flow-cytometry-based competition assay.
• Applied the assay to human and murine AML cell lines.

Main Results:

• Demonstrated the efficacy of CRISPR/Cas9-mediated gene disruption for phenotypic screening.
• Successfully employed flow cytometry competition assays to identify genes affecting AML cell fitness.
• Established a scalable platform for investigating gene function in AML.

Conclusions:

• CRISPR/Cas9 combined with competition assays offers a powerful and scalable approach for AML gene function studies.
• This method significantly accelerates the discovery of genes involved in AML cell proliferation and survival.
• The assay provides a valuable tool for advancing AML research and therapeutic target identification.