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Cadherin-mediated cell interaction regulates germ cell determination in mice
Daiji Okamura1, Thoru Kimura, Toru Nakano
1Department of Molecular Embryology, Research Institute, Osaka Medical Center for Maternal and Child Health, 840, Murodo-cho, Izumi, Osaka, 594-1101, Japan.
Development (Cambridge, England)
|November 25, 2003
Summary
Germ cell specification in mice requires cell-cell interactions. E-cadherin-mediated adhesion among primordial germ cell (PGC) precursors is essential for directing them to the germ cell fate.
Area of Science:
- Developmental biology
- Cell biology
- Genetics
Background:
- Germ cell lineage segregation is crucial for reproduction.
- In mice, germ cell determination occurs during gastrulation, independent of maternal factors.
- Mechanisms of germ cell specification in mice are not fully understood.
Purpose of the Study:
- To investigate the mechanisms of germ cell specification in early mouse embryos.
- To identify the role of cell-cell interactions in primordial germ cell (PGC) formation.
- To determine the involvement of E-cadherin in germ cell fate determination.
Main Methods:
- Localization of PGC precursors in early embryos.
- In vitro inhibition of E-cadherin function using antibodies.
- Analysis of PGC formation following E-cadherin blockade.
Main Results:
- PGC precursors were identified within early embryos.
- Expression of E-cadherin was localized to the proximal extra-embryonic mesoderm containing PGC precursors.
- Blocking E-cadherin function inhibited PGC formation in vitro.
Conclusions:
- Cell-cell interaction among PGC precursors is required for germ cell specification.
- E-cadherin-mediated cell adhesion is essential for directing cells to the germ cell fate.
- This study elucidates a key mechanism in early germ cell development in mice.