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Adaptive and maladaptive endothelial cell dynamics during blood flow-driven vascular patterning

Project description

Lessons from the traffic cop directing cell migration and patterned blood vessel formation

Just as no man is an island, neither is a single cell. The body's cells and tissues work in concert to accomplish tasks critical to physiological functioning. Understanding the signalling networks underlying dynamic changes in the body is an important step in untangling related disease processes. Blood flow itself drives vascular patterning, somehow influencing the blueprint for laying down the complex network of blood vessels that sustains life. A thin layer of cells lining the vessels respond to flow but how that signal is transduced into patterning is an open question. ADAPT2FLOW is exploiting a mouse model to determine effects of blood flow on cell migration and their regulators. Insight could have important impact on mitigating vascular disease.

Objective

The formation of a functional patterned (adaptation) vascular network is essential for development, tissue growth, and organ physiology. Several human vascular disorders arise from the mis-patterning (maladaptation) of blood vessels, such as arteriovenous malformations, aneurysms, and diabetic retinopathy. Blood flow is recognized as the main inducer for vascular patterning, yet very little is known about the molecular mechanisms that vascular patterning.

C. Franco and others recently highlighted that endothelial cells polarize and migrate against the blood flow direction. Yet, how this behavior contributes to the overall process of vascular patterning is completely unknown. This project aims to study the dynamics of endothelial cells in vascular patterning during development, homeostasis, and disease. Taking advantage of a unique new transgenic mouse line reporting endothelial cell polarity in vivo, I will investigate endothelial cell behavior in vivo, including endothelial cell polarity, collective and individual migration and cell rearrangements, using 2-photon microscopy. I will extend this analysis to understand the involvement of endothelial flow-dependent polarity in formation and development of arteriovenous malformations. Finally, I will perform an in vivo functional screen to identify novel regulators of endothelial flow-dependent polarity, using a combination of automated image analysis and hemodynamics modelling.

This integrative approach, based on high-resolution imaging and unique experimental models, will provide a unifying model defining the cellular and molecular principles involved in adaptive and maladaptive endothelial cell dynamics during blood flow-driven vascular patterning. Given the physiological relevance of vascular patterning in health and disease, this research plan will set the basis for the development of novel clinical therapies targeting vascular disorders.

Fields of science (EuroSciVoc)

Programme(s)

Topic(s)

Funding Scheme

MSCA-IF-EF-ST - Standard EF

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Call for proposal

(opens in new window) H2020-MSCA-IF-2018

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Coordinator

INSTITUTO DE MEDICINA MOLECULAR JOAO LOBO ANTUNES
Net EU contribution
€ 147 815,04
Address
AVENIDA PROF EGAS MONIZ
1649 028 Lisboa
Portugal
Region
Continente Área Metropolitana de Lisboa Área Metropolitana de Lisboa
Activity type
Research Organisations
Links
Total cost
€ 147 815,04