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@ARTICLE{Korn:127671,
author = {C. Korn$^*$ and B. Scholz$^*$ and J. Hu$^*$ and K.
Srivastava$^*$ and J. Wojtarowicz$^*$ and T. Arnsperger$^*$
and R. H. Adams and M. Boutros$^*$ and H. Augustin$^*$ and
I. Augustin$^*$},
title = {{E}ndothelial cell-derived non-canonical {W}nt ligands
control vascular pruning in angiogenesis.},
journal = {Development},
volume = {141},
number = {8},
issn = {1477-9129},
address = {Cambridge},
publisher = {The Company of Biologists},
reportid = {DKFZ-2017-03694},
pages = {1757 - 1766},
year = {2014},
abstract = {Multiple cell types involved in the regulation of
angiogenesis express Wnt ligands. Although β-catenin
dependent and independent Wnt signaling pathways have been
shown to control angiogenesis, the contribution of
individual cell types to activate these downstream pathways
in endothelial cells (ECs) during blood vessel formation is
still elusive. To investigate the role of ECs in
contributing Wnt ligands for regulation of blood vessel
formation, we conditionally deleted the Wnt secretion factor
Evi in mouse ECs (Evi-ECKO). Evi-ECKO mice showed decreased
microvessel density during physiological and pathological
angiogenesis in the postnatal retina and in tumors,
respectively. The reduced microvessel density resulted from
increased vessel regression accompanied by decreased EC
survival and proliferation. Concomitantly, survival-related
genes were downregulated and cell cycle arrest- and
apoptosis-inducing genes were upregulated. EVI silencing in
cultured HUVECs showed similar target gene regulation,
supporting a mechanism of EC-derived Wnt ligands in
controlling EC function. ECs preferentially expressed
non-canonical Wnt ligands and canonical target gene
expression was unaffected in Evi-ECKO mice. Furthermore, the
reduced vascularization of Matrigel plugs in Evi-ECKO mice
could be rescued by introduction of non-canonical Wnt5a.
Treatment of mouse pups with the non-canonical Wnt inhibitor
TNP470 resulted in increased vessel regression accompanied
by decreased EC proliferation, thus mimicking the
proliferation-dependent Evi-ECKO remodeling phenotype. Taken
together, this study identified EC-derived non-canonical Wnt
ligands as regulators of EC survival, proliferation and
subsequent vascular pruning during developmental and
pathological angiogenesis.},
keywords = {Cyclohexanes (NLM Chemicals) / DNA-Binding Proteins (NLM
Chemicals) / Evi1 protein, mouse (NLM Chemicals) / Ligands
(NLM Chemicals) / Sesquiterpenes (NLM Chemicals) /
Transcription Factors (NLM Chemicals) / Wnt Proteins (NLM
Chemicals) / O-(chloroacetylcarbamoyl)fumagillol (NLM
Chemicals)},
cin = {B110 / A190 / L101},
ddc = {570},
cid = {I:(DE-He78)B110-20160331 / I:(DE-He78)A190-20160331 /
I:(DE-He78)L101-20160331},
pnm = {322 - Genetics and Pathophysiology (POF3-322)},
pid = {G:(DE-HGF)POF3-322},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:24715464},
doi = {10.1242/dev.104422},
url = {https://inrepo02.dkfz.de/record/127671},
}