Hedgehog signaling regulates size of the dorsal aortae and density of the plexus during avian vascular development

Carlos M. Moran, Matthew C. Salanga, Paul A Krieg

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Signaling by the hedgehog (Hh) family of secreted growth factors is essential for development of embryonic blood vessels. Embryos lacking Hh function have abundant endothelial cells but fail to assemble vascular cords or lumenized endothelial tubes. However, the role of Hh signaling during later aspects of vascular patterning and morphogenesis is largely unexplored. We have used small molecule inhibitors and agonists to alter activity of the Hh signaling pathway in the chick embryo. When cyclopamine is added after cord formation, aortal cells form tubes, but these are small and disorganized and the density of the adjacent vascular plexus is reduced. Activation of the Hh pathway with SAG leads to formation of enlarged aortae and increased density of the plexus. The number of endothelial cell filopodia is found to correlate with Hh signaling levels. These studies show that Hh signaling levels must be tightly regulated for normal vascular patterning to be achieved.

Original languageEnglish (US)
Pages (from-to)1354-1364
Number of pages11
JournalDevelopmental Dynamics
Volume240
Issue number6
DOIs
StatePublished - Jun 2011

Fingerprint

Blood Vessels
Aorta
Endothelial Cells
Pseudopodia
Chick Embryo
Morphogenesis
Embryonic Development
Intercellular Signaling Peptides and Proteins
Embryonic Structures

Keywords

  • Cyclopamine
  • Endothelial development
  • Filopodia
  • Hedgehog
  • Jervine
  • Purmorphamine
  • SAG
  • SANT1

ASJC Scopus subject areas

  • Developmental Biology

Cite this

Hedgehog signaling regulates size of the dorsal aortae and density of the plexus during avian vascular development. / Moran, Carlos M.; Salanga, Matthew C.; Krieg, Paul A.

In: Developmental Dynamics, Vol. 240, No. 6, 06.2011, p. 1354-1364.

Research output: Contribution to journalArticle

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