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β-Pix-dependent cellular protrusions propel collective mesoderm migration in the mouse embryo
Tatiana Omelchenko1,2, Alan Hall3, Kathryn V Anderson4
1Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA. OmelcheT@mskcc.org.
Nature Communications
|November 28, 2020
Summary
Mouse embryo development relies on coordinated cell movement. Beta-Pix (Arhgef7) is crucial for mesoderm organization, guiding collective cell migration through filopodia-like protrusions, essential for proper body plan formation.
Area of Science:
- Developmental biology
- Cell biology
- Genetics
Background:
- Coordinated cell migration in the embryonic mesoderm is vital for body plan development.
- The molecular mechanisms regulating this collective cell migration are not fully understood.
Purpose of the Study:
- To investigate the role of beta-Pix (Arhgef7) in mesoderm organization and collective cell migration during mouse embryonic development.
- To elucidate the cellular and molecular mechanisms by which beta-Pix influences mesoderm cell behavior in vivo.
Main Methods:
- Optimized single-cell live-embryo imaging techniques.
- Advanced cell tracking and volumetric analysis of mesoderm cells.
- Analysis of beta-Pix mutant mouse embryos at early developmental stages (E7.5).
Main Results:
- Beta-Pix mutant embryos exhibit defects in mesoderm layer thickness and somite formation.
- Beta-Pix mutant mesoderm cells display random migration patterns, unlike coordinated wild-type cells.
- Absence of polarized filopodia-like protrusions in beta-Pix mutant mesoderm cells.
Conclusions:
- Beta-Pix (Arhgef7) is essential for coordinated collective cell migration in the embryonic mesoderm.
- Beta-Pix regulates mesoderm organization by promoting the formation of cellular protrusions that drive directional movement.
- These findings highlight the critical role of beta-Pix in establishing the embryonic body plan through controlled cell migration.
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