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Endothelial Erg expression is required for embryogenesis and vascular integrity.
Rong Han1, Maurizio Pacifici, Masahiro Iwamoto
1a Arthritis Center; Boston University School of Medicine ; Boston , MA USA.
Organogenesis
|June 11, 2015
Summary
The ETS-related gene (ERG) is crucial for blood vessel development. Conditional ablation of ERG in endothelial cells during embryogenesis led to embryonic lethality, highlighting its essential role in blood vessel formation and maintenance.
Area of Science:
- Developmental biology
- Molecular biology
- Genetics
Background:
- Members of the ETS family of transcription factors regulate crucial developmental processes.
- The specific roles of the ETS family member Erg (also known as ETS2 repressor oncoprotein) in endothelial cell specification and vascular development are not fully understood.
- Erg exhibits high expression in endothelial cells compared to other developing cell types.
Purpose of the Study:
- To investigate the precise functions of ERG in endothelial cell specification and function during early embryogenesis.
- To determine the necessity of ERG for proper blood vessel formation and integrity.
Main Methods:
- Conditional ablation of the Erg gene in endothelial cells using ErgloxP/loxP and Tie2-Cre mouse models.
- Analysis of embryonic development, focusing on angiogenesis and vascular integrity in mutant embryos.
Main Results:
- Mutant embryos lacking functional ERG exhibited embryonic lethality by mid-gestation.
- Significant defects in angiogenesis and compromised vascular integrity were observed in the absence of ERG.
- ERG plays a cell-autonomous role in endothelial cell development.
Conclusions:
- ERG is essential for endothelial cell development and the maintenance of blood vessel integrity during embryogenesis.
- Conditional ablation of ERG leads to severe vascular defects and embryonic lethality, underscoring its critical role.
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