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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Oncotarget
2016 ; 7
(43
): 69436-69449
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TNFSF15 suppresses VEGF production in endothelial cells by stimulating miR-29b
expression via activation of JNK-GATA3 signals
#MMPMID27589684
Zhang K
; Cai HX
; Gao S
; Yang GL
; Deng HT
; Xu GC
; Han J
; Zhang QZ
; Li LY
Oncotarget
2016[Oct]; 7
(43
): 69436-69449
PMID27589684
show ga
Vascular endothelial cell growth factor (VEGF) plays a pivotal role in promoting
neovascularization. VEGF gene expression in vascular endothelial cells in normal
tissues is maintained at low levels but becomes highly up-regulated in a variety
of disease settings including cancers. Tumor necrosis factor superfamily 15
(TNFSF15; VEGI; TL1A) is an anti-angiogenic cytokine prominently produced by
endothelial cells in a normal vasculature. We report here that VEGF production in
mouse endothelial cell line bEnd.3 can be inhibited by TNFSF15 via microRNA-29b
(miR-29b) that targets the 3'-UTR of VEGF transcript. Blocking TNFSF15 activity
by using either siRNA against the TNFSF15 receptor known as death
domain-containing receptor-3 (DR3; TNFRSF25), or a neutralizing antibody 4-3H
against TNFSF15, led to inhibition of miR-29b expression and reinvigoration of
VEGF production. In addition, we found that TNFSF15 activated the JNK signaling
pathway as well as the transcription factor GATA3, resulting in enhanced miR-29b
production. Treatment of the cells either with SP600125, an inhibitor of JNK, or
with JNK siRNA, led to eradication of TNFSF15-induced GATA3 expression. Moreover,
GATA3 siRNA suppressed TNFSF15-induced miR-29b expression. These findings suggest
that VEGF gene expression can be suppressed by TNFSF15-stimulated activation of
the JNK-GATA3 signaling pathway which gives rise to up-regulation of miR-29b.