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Integrin β1 controls VE-cadherin localization and blood vessel stability
Hiroyuki Yamamoto1, Manuel Ehling1, Katsuhiro Kato1
11] Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Röntgenstrasse 20, D-48149 Münster, Germany [2] Faculty of Medicine, University of Münster, Röntgenstrasse 20, D-48149 Münster, Germany.
Nature Communications
|March 11, 2015
Summary
Integrin beta1 (β1) promotes new blood vessel growth but limits proliferation. It is crucial for stable blood vessel formation and integrity in maturing vessels.
Area of Science:
- Cardiovascular Biology
- Cell Biology
- Developmental Biology
Background:
- Angiogenesis, or blood vessel growth, involves complex endothelial cell activities.
- Integrin-mediated cell-matrix interactions are vital for embryonic blood vessel formation.
- The specific roles of integrins in postnatal vascular morphogenesis remain largely unknown.
Purpose of the Study:
- To investigate the function of the integrin beta1-subunit in postnatal vascular development.
- To elucidate the role of integrin beta1 in endothelial sprouting, proliferation, and vessel maturation.
Main Methods:
- Utilized inducible and endothelial-specific gene targeting in postnatal mouse retinas.
- Examined the effects of integrin beta1 subunit manipulation on vascular morphogenesis.
Main Results:
- Integrin beta1 promotes endothelial cell sprouting during blood vessel growth.
- Integrin beta1 acts as a negative regulator of endothelial cell proliferation.
- Integrin beta1 is essential for VE-cadherin localization and cell-cell junction integrity in maturing vessels.
Conclusions:
- Integrin beta1 plays critical roles in both growing and maturing vasculature.
- Integrin beta1 is indispensable for the formation of stable, non-leaky blood vessels.
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