Abstract:
:Angiogenesis is a highly regulated process essential for organ development and maintenance, and its deregulation contributes to inflammation, cardiac disorders, and cancer. The Ca2+/nuclear factor of activated T cells (NFAT) signaling pathway is central to endothelial cell angiogenic responses, and it is activated by stimuli like vascular endothelial growth factor (VEGF) A. NFAT phosphorylation by dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs) is thought to be an inactivating event. Contrary to expectations, we show that the DYRK family member DYRK1A positively regulates VEGF-dependent NFAT transcriptional responses in primary endothelial cells. DYRK1A silencing reduces intracellular Ca2+ influx in response to VEGF, which dampens NFAT activation. The effect is exerted at the level of VEGFR2 accumulation leading to impairment in PLCγ1 activation. Notably, Dyrk1a heterozygous mice show defects in developmental retinal vascularization. Our data establish a regulatory circuit, DYRK1A/ Ca2+/NFAT, to fine-tune endothelial cell proliferation and angiogenesis.
journal_name
Cell Repjournal_title
Cell reportsauthors
Rozen EJ,Roewenstrunk J,Barallobre MJ,Di Vona C,Jung C,Figueiredo AF,Luna J,Fillat C,Arbonés ML,Graupera M,Valverde MA,de la Luna Sdoi
10.1016/j.celrep.2018.04.008subject
Has Abstractpub_date
2018-05-08 00:00:00pages
1867-1878issue
6issn
2211-1247pii
S2211-1247(18)30537-0journal_volume
23pub_type
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