Dynamique de la jonction adhérente : rôle d'EPLIN dans la stabilité des contacts intercellulaires de l'endothélium vasculaire

Abstract : The endothelium forms the main barrier regulating the passage of macromolecules and circulating cells between the blood and tissue. Historically viewed as a passive vascular lining, vascular endothelium plays important roles in the regulation of vascular pressure, hemostasis, immune and inflammatory responses. In vascular endothelium, cell/cell adhesion is mediated by homophilic interactions of VE-cadherin molecules (= adherens junctions). Cytoskeleton and junction dynamics are important for intercellular junctions remodelling that occurs during angiogenesis, vasculogenesis and endothelium repair. So, determining the underlying molecular mechanisms is essential for the comprehension of pathologic phenomena such as angiogenesis, tumor progression or inflammation. We learn from the literature that EPLIN is involved in E-cadherin/α-catenin/EPLIN complex formation and cortical actin stabilization. Usually described as a protein specific of epithelial models, we wondered if EPLIN is able to link VE-cadherin complex to actin cytoskeleton. Furthermore, it seems essential to understand its cellular role since it is downregulated in many cancers while in contrast its overexpression blocks cell proliferation.
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Cellular Biology. Université de Grenoble, 2011. French. <NNT : 2011GRENV050>


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Adeline Pétinot. Dynamique de la jonction adhérente : rôle d'EPLIN dans la stabilité des contacts intercellulaires de l'endothélium vasculaire. Cellular Biology. Université de Grenoble, 2011. French. <NNT : 2011GRENV050>. <tel-00650170>

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