Abstract:
:We conducted a genome-wide analysis of genes that are regulated by vascular endothelial growth factor (VEGF) in endothelial cells and identified DSCR1 to be most significantly induced. Consistent with an antagonistic function on calcineurin (CnA) signaling, expression of DSCR1 in endothelial cells blocked dephosphorylation, nuclear translocation, and activity of nuclear factor of activated T cell (NFAT), a transcription factor involved in mediating CnA signaling. DSCR1 was not only induced by VEGF, but also by other compounds activating CnA signaling, suggesting a more general role for DSCR1 in activated endothelial cells. Transient expression of DSCR1 attenuated inflammatory marker genes such as tissue factor (TF), E-selectin, and Cox-2, identifying a previously unknown regulatory role for DSCR1 in activated endothelial cells. In contrast, knock-down of endogenous DSCR1 increased NFAT activity and stimulated expression of inflammatory genes on activated endothelial cells. Thus, the negative regulatory feedback loop between DSCR1 and CnA signaling in endothelial cells identified may represent a potential molecular mechanism underlying the frequently transient expression of inflammatory genes following activation of endothelial cells.
journal_name
Bloodjournal_title
Bloodauthors
Hesser BA,Liang XH,Camenisch G,Yang S,Lewin DA,Scheller R,Ferrara N,Gerber HPdoi
10.1182/blood-2004-01-0273subject
Has Abstractpub_date
2004-07-01 00:00:00pages
149-58issue
1eissn
0006-4971issn
1528-0020pii
2004-01-0273journal_volume
104pub_type
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