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Updated: Aug 26, 2025
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Evaluation of Abnormal Growth-related Genes of Hematopoietic Stem and Progenitor Cells by Combining CRISPR/Cas9 Technology with Cell Counting
Published on: May 2, 2025
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Comprehensive CRISPR-Cas9 screen identifies factors which are important for plasmablast development.
Theresa Pinter1, Maria Fischer1, Markus Schäfer1
1Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, Vienna, Austria.
Frontiers in Immunology
|October 3, 2022
Summary
Researchers identified new genes crucial for plasmablast (PB) development, enhancing antibody production for host defense. This discovery aids understanding of immune responses and B cell differentiation.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Plasma cells (PCs) and plasmablasts (PBs) are vital for antibody production and host defense against infections.
- Key transcription factors like Blimp1 and Irf4 regulate PC and PB differentiation and survival.
Purpose of the Study:
- To identify novel genes essential for plasmablast development using a large-scale genetic screen.
- To expand the understanding of the molecular mechanisms governing B cell differentiation into antibody-secreting cells.
Main Methods:
- Conducted a CRISPR-Cas9 screen of 3,000 genes to identify those critical for PB development.
- Utilized an in vitro-inducible germinal center B cell (iGB) culture system and Rosa26Cas9/+ mice for the screening.
- Analyzed gene loss-of-function effects on PB populations.
Main Results:
- Identified Mau2 and Nipbl, genes involved in cohesin complex loop extrusion, as essential for PB development.
- Discovered additional promising candidate genes including Taf6, Stat3, Ppp6c, and Pgs1.
- Provided a new set of genes critical for PB development.
Conclusions:
- The study successfully identified novel genes that play significant roles in plasmablast development.
- These findings contribute to a deeper understanding of the genetic regulation of B cell differentiation and antibody production.
- The identified genes offer potential targets for modulating immune responses.
