Document Detail


Hypoxia-induced Arterial Differentiation Requires Adrenomedullin and Notch Signaling.
MedLine Citation:
PMID:  23379656     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Hypoxia (low oxygen) and Notch signaling are two important regulators of vascular development, but how they interact in controlling the choice between arterial and venous fates for endothelial cells during vasculogenesis is less well understood. In this report, we show that hypoxia and Notch signaling intersect in promotion of arterial differentiation. Hypoxia upregulated expression of the Notch ligand Dll4 and increased Notch signaling, in a process requiring the vasoactive hormone adrenomedullin. Notch signaling also upregulated Dll4 expression, leading to a positive feedback loop sustaining Dll4 expression and Notch signaling. In addition, hypoxia-mediated upregulation of the arterial marker genes Depp, connexin40 (Gja5), Cxcr4 and Hey1 required Notch signaling. In conclusion, the data reveal an intricate interaction between hypoxia and Notch signaling in the control of endothelial cell differentiation, including a hypoxia/adrenomedullin/Dll4 axis that initiates Notch signaling and a requirement for Notch signaling to effectuate hypoxia-mediated induction of the arterial differentiation program.
Authors:
Fredrik Lanner; Kian Leong Lee; Germán Camargo Ortega; Marcus Sohl; Xiujuan Li; Shaobo Jin; Emil M Hansson; Lena Claesson-Welsh; Lorenz Poellinger; Urban Lendahl; Filip Farnebo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-5
Journal Detail:
Title:  Stem cells and development     Volume:  -     ISSN:  1557-8534     ISO Abbreviation:  Stem Cells Dev.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101197107     Medline TA:  Stem Cells Dev     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Karolinska Institutet, Department of Clinical Sciences, Intervention and Technology (CLINTEC), Stockholm, Sweden; fredrik.lanner@ki.se.
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