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@ARTICLE{Laban:292100,
author = {H. Laban and S. Siegmund and K. Schlereth and F. A.
Trogisch and A. Ablieh and L. Brandenburg and A. Weigert and
C. De La Torre and C. Mogler and M. Hecker and W. M. Kuebler
and T. Korff},
title = {{N}uclear factor of activated {T}-cells 5 is indispensable
for a balanced adaptive transcriptional response of lung
endothelial cells to hypoxia.},
journal = {Cardiovascular research},
volume = {120},
number = {13},
issn = {0008-6363},
address = {Oxford},
publisher = {Oxford University Press},
reportid = {DKFZ-2024-01599},
pages = {1590-1606},
year = {2024},
note = {2024 Nov 5;120(13):1590-1606 / (DKFZ-ZMBH Alliance)},
abstract = {Chronic hypoxia causes detrimental structural alterations
in the lung, which may cause pulmonary hypertension and are
partially mediated by the endothelium. While its relevance
for the development of hypoxia-associated lung diseases is
well known, determinants controlling the initial adaptation
of the lung endothelium to hypoxia remain largely
unexplored.We revealed that hypoxia activates the
transcription factor nuclear factor of activated T-cells 5
(NFAT5) and studied its regulatory function in murine lung
endothelial cells (MLECs). EC-specific knockout of Nfat5
(Nfat5(EC)-/-) in mice exposed to normobaric hypoxia $(10\%$
O2) for 21 days promoted vascular fibrosis and aggravated
the increase in pulmonary right ventricular systolic
pressure as well as right ventricular dysfunction as
compared with control mice. Microarray- and single-cell
RNA-sequencing-based analyses revealed an impaired growth
factor-, energy-, and protein-metabolism-associated gene
expression in Nfat5-deficient MLEC after exposure to hypoxia
for 7 days. Specifically, loss of NFAT5 boosted the
expression and release of platelet-derived growth factor B
(Pdgfb)-a hypoxia-inducible factor 1 alpha
(HIF1α)-regulated driver of vascular smooth muscle cell
(VSMC) growth-in capillary MLEC of hypoxia-exposed
Nfat5(EC)-/- mice, which was accompanied by intensified VSMC
coverage of distal pulmonary arteries.Collectively, our
study shows that early and transient subpopulation-specific
responses of MLEC to hypoxia may determine the degree of
organ dysfunction in later stages. In this context, NFAT5
acts as a protective transcription factor required to
rapidly adjust the endothelial transcriptome to cope with
hypoxia. Specifically, NFAT5 restricts HIF1α-mediated Pdgfb
expression and consequently limits muscularization and
resistance of the pulmonary vasculature.},
keywords = {Endothelial cells (Other) / Hypoxia (Other) / NFAT5 (Other)
/ Pulmonary hypertension (Other) / Transcriptome (Other)},
cin = {A190},
ddc = {610},
cid = {I:(DE-He78)A190-20160331},
pnm = {311 - Zellbiologie und Tumorbiologie (POF4-311)},
pid = {G:(DE-HGF)POF4-311},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39107245},
doi = {10.1093/cvr/cvae151},
url = {https://inrepo02.dkfz.de/record/292100},
}