Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/7132
Título: Dll4-Notch signaling determines the formation of native arterial collateral networks and arterial function in mouse ischemia models
Autor: Cristofaro, Brunella
Yu Shi
Faria, Marcella
Suchting, Steven
Leroyer, Aurelie S.
Trindade, Alexandre
Duarte, Antonio
Zovein, Ann C.
Iruela-Arispe, M. Luisa
Nih, Lina R.
Kubis, Nathalie
Henrion, Daniel
Loufrani, Laurent
Todiras, Mihail
Schleifenbaum, Johanna
Gollasch, Maik
Zhuang, Zhen W.
Simons, Michael
Eichmann, Anne
Le Noble, Ferdinand
Palavras-chave: Angiogenesis
Arteriogenesis
Vessel branching
Dll4-Notch signaling
Mouse
Data: 15-Abr-2013
Editora: The Company of Biologists Ltd
Citação: Cristofaro, B., (2013). Dll4-Notch signaling determines the formation of native arterial collateral networks and arterial function in mouse ischemia models. Development, 140(8), 1720-1729. doi:10.1242/dev.092304
Resumo: Arteriogenesis requires growth of pre-existing arteriolar collateral networks and determines clinical outcome in arterial occlusive diseases. Factors responsible for the development of arteriolar collateral networks are poorly understood. The Notch ligand Deltalike 4 (Dll4) promotes arterial differentiation and restricts vessel branching. We hypothesized that Dll4 may act as a genetic determinant of collateral arterial networks and functional recovery in stroke and hind limb ischemia models in mice. Genetic lossand gain-of-function approaches in mice showed that Dll4-Notch signaling restricts pial collateral artery formation by modulating arterial branching morphogenesis during embryogenesis. Adult Dll4+/− mice showed increased pial collateral numbers, but stroke volume upon middle cerebral artery occlusion was not reduced compared with wild-type littermates. Likewise, Dll4+/− mice showed reduced blood flow conductance after femoral artery occlusion, and, despite markedly increased angiogenesis, tissue ischemia was more severe. In peripheral arteries, loss of Dll4 adversely affected excitation-contraction coupling in arterial smooth muscle in response to vasopressor agents and arterial vessel wall adaption in response to increases in blood flow, collectively contributing to reduced flow reserve. We conclude that Dll4-Notch signaling modulates native collateral formation by acting on vascular branching morphogenesis during embryogenesis. Dll4 furthermore affects tissue perfusion by acting on arterial function and structure. Loss of Dll4 stimulates collateral formation and angiogenesis, but in the context of ischemic diseases such beneficial effects are overruled by adverse functional changes, demonstrating that ischemic recovery is not solely determined by collateral number but rather by vessel functionality.
Descrição: Articles in International Journals
Peer review: yes
URI: http://hdl.handle.net/10400.5/7132
DOI: 10.1242/dev.092304
ISSN: 1477-9129
Aparece nas colecções:DMF - Artigos de revista
CIISA - Artigos em revistas internacionais



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