Screening Genes Promoting Exit from Naive Pluripotency Based on Genome-Scale CRISPR-Cas9 Knockout

Area of Science:

• Stem Cell Biology
• Regenerative Medicine
• Genomics

Background:

• Clinical translation of stem cell research faces challenges in controlling pluripotency exit and cell differentiation.
• Mechanisms governing pluripotent stem cell self-renewal and differentiation remain incompletely understood.

Purpose of the Study:

• To develop and apply a genome-scale CRISPR-Cas9 knockout (GeCKO) screening model for unbiased identification of genes involved in pluripotency exit in mouse embryonic stem cells (mESCs).
• To provide a novel approach for large-scale gene screening in cell fate regulation research.

Main Methods:

• Utilized genome-scale CRISPR-Cas9 knockout (GeCKO) technology for targeted loss-of-function mutations.
• Employed lentiviral packaging and infection, lenti-Cas9 gene knockout, and shRNA gene knockdown.
• Performed next-generation sequencing and model-based analysis of genome-scale CRISPR-Cas9 knockout (MAGeCK analysis), alongside Gene Ontology (GO) analysis.

Main Results:

• Successfully established a GeCKO-based screening model to identify key genes regulating pluripotency withdrawal in mESCs.
• Demonstrated the efficacy of GeCKO for unbiased, large-scale screening of genes influencing stem cell fate.

Conclusions:

• The developed GeCKO screening model offers a powerful new tool for dissecting the genetic underpinnings of pluripotency exit.
• Findings provide a foundation for further research into cell fate regulation and potential therapeutic strategies in regenerative medicine.