17 documents found, page 1 of 2
A 96-wells fluidic system for high-throughput screenings under laminar high wal...
Fonseca, Catarina; Silvério, Vânia; Barata, David; Giese, Wolfgang; Gerhardt, Holger; Cardoso, Susana; Franco, ClaudioThe ability of endothelial cells to respond to blood flow is fundamental for the correct formation and maintenance of a functional and hierarchically organized vascular network. Defective flow responses, in particular related to high flow conditions, have been associated with atherosclerosis, stroke, arteriovenous malformations, and neurodegenerative diseases. Yet, the molecular mechanisms involved in high flow...
Aerocyte specification and lung adaptation to breathing is dependent on alterna...
Fidalgo, Marta F; Fonseca, Catarina; Caldas, Paulo; Raposo, Alexandre; Balboni, Tania; Henao Mišíková, Lenka; Grosso, Ana R.; Vasconcelos, FranciscaAdaptation to breathing is a critical step in lung function and it is crucial for organismal survival. Alveoli are the lung gas exchange units and their development, from late embryonic to early postnatal stages, requires feedbacks between multiple cell types. However, how the crosstalk between the alveolar cell types is modulated to anticipate lung adaptation to breathing is still unclear. Here, we uncovered a...
Shielding of actin by the endoplasmic reticulum impacts nuclear positioning
Janota, Cátia; Pinto, Andreia; Pezzarossa, Anna; Machado, Pedro; Costa, Judite; Campinho, Pedro; Franco, Claudio; Gomes, EdgarNuclear position is central to cell polarization, and its disruption is associated with various pathologies. The nucleus is moved away from the leading edge of migrating cells through its connection to moving dorsal actin cables, and the absence of connections to immobile ventral stress fibers. It is unclear how these asymmetric nucleo-cytoskeleton connections are established. Here, using an in vitro wound assa...
Immunopathology and Trypanosoma congolense parasite sequestration cause acute c...
De Niz, Mariana; Silva Pereira, Sara; Serre, Karine; Ouarné, Marie; Coelho, Joana E; Franco, Claudio; Figueiredo, Luisa M.Trypanosoma congolense causes a syndrome of variable severity in animals in Africa. Cerebral trypanosomiasis is a severe form, but the mechanism underlying this severity remains unknown. We developed a mouse model of acute cerebral trypanosomiasis and characterized the cellular, behavioral, and physiological consequences of this infection. We show large parasite sequestration in the brain vasculature for long p...
Competition for endothelial cell polarity drives vascular morphogenesis in the ...
Barbacena, Pedro; Dominguez-Cejudo, Maria Angeles; Fonseca, Catarina; Gómez-González, Manuel; Faure, Laura M.; Zarkada, Georgia; Pena, AndreiaBlood-vessel formation generates unique vascular patterns in each individual. The principles governing the apparent stochasticity of this process remain to be elucidated. Using mathematical methods, we find that the transition between two fundamental vascular morphogenetic programs-sprouting angiogenesis and vascular remodeling-is established by a shift of collective front-to-rear polarity of endothelial cells ...
AUTONOMIA E O USO DE RECURSOS DIGITAIS NO ENSINO-APRENDIZAGEM DE INGLÊS
Franco, ClaudioO presente artigo, organizado em duas partes, busca oferecer subsídios teóricos e práticos ao focalizar o uso de recursos digitais no desenvolvimento da autonomia dos agentes envolvidos no processo de ensino-aprendizagem de inglês. Na primeira parte, de natureza teórica, orientados pela teoria da complexidade, propomos oferecer uma breve visão do conceito de autonomia como sistema adaptativo complexo. Na segund...
On the preservation of vessel bifurcations during flow-mediated angiogenic remo...
Edgar, Lowell T.; Franco, Claudio; Gerhardt, Holger; Bernabeu, Miguel O.During developmental angiogenesis, endothelial cells respond to shear stress by migrating and remodelling the initially hyperbranched plexus, removing certain vessels whilst maintaining others. In this study, we argue that the key regulator of vessel preservation is cell decision behaviour at bifurcations. At flow-convergent bifurcations where migration paths diverge, cells must finely tune migration along both...
Defective flow-migration coupling causes arteriovenous malformations in heredit...
Park, Hyojin; Furtado, Jessica; Poulet, Mathilde; Chung, Minhwan; Yun, Sanguk; Lee, Sungwoon; Sessa, William C.; Franco, Claudio; Schwartz, Martin A.Background: Activin receptor-like kinase 1 (ALK1) is an endothelial transmembrane serine threonine kinase receptor for BMP family ligands that plays a critical role in cardiovascular development and pathology. Loss-of-function mutations in the ALK1 gene cause type 2 hereditary hemorrhagic telangiectasia, a devastating disorder that leads to arteriovenous malformations. Here, we show that ALK1 controls endotheli...
Endothelial cell invasion is controlled by dactylopodia
Figueiredo, Ana; Barbacena, Pedro; Russo, Ana; Vaccaro, Silvia; Ramalho, Daniela; Pena, Andreia; Lima, Aida Pires; Rua Ferreira, Rita; Fidalgo, MartaSprouting angiogenesis is fundamental for development and contributes to cancer, diabetic retinopathy, and cardiovascular diseases. Sprouting angiogenesis depends on the invasive properties of endothelial tip cells. However, there is very limited knowledge on how tip cells invade into tissues. Here, we show that endothelial tip cells use dactylopodia as the main cellular protrusion for invasion into nonvascular...
Organotypic endothelial adhesion molecules are key for Trypanosoma brucei tropi...
De Niz, Mariana; Brás, Daniela; Ouarné, Marie; Pedro, Mafalda; Nascimento, Ana M.; Henao Mišíková, Lenka; Franco, Claudio; Figueiredo, Luisa M.Trypanosoma brucei is responsible for lethal diseases in humans and cattle in Sub-Saharan Africa. These extracellular parasites extravasate from the blood circulation into several tissues. The importance of the vasculature in tissue tropism is poorly understood. Using intravital imaging and bioluminescence, we observe that gonadal white adipose tissue and pancreas are the two main parasite reservoirs. We show t...