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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 J+Cell+Physiol
2015 ; 230
(6
): 1310-20
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Transcription factor MEF2C suppresses endothelial cell inflammation via
regulation of NF-?B and KLF2
#MMPMID25474999
Xu Z
; Yoshida T
; Wu L
; Maiti D
; Cebotaru L
; Duh EJ
J Cell Physiol
2015[Jun]; 230
(6
): 1310-20
PMID25474999
show ga
Endothelial cells play a major role in the initiation and perpetuation of the
inflammatory process in health and disease, including their pivotal role in
leukocyte recruitment. The role of pro-inflammatory transcription factors in this
process has been well-described, including NF-?B. However, much less is known
regarding transcription factors that play an anti-inflammatory role in
endothelial cells. Myocyte enhancer factor 2 C (MEF2C) is a transcription factor
known to regulate angiogenesis in endothelial cells. Here, we report that MEF2C
plays a critical function as an inhibitor of endothelial cell inflammation. Tumor
necrosis factor (TNF)-? inhibited MEF2C expression in endothelial cells.
Knockdown of MEF2C in endothelial cells resulted in the upregulation of
pro-inflammatory molecules and stimulated leukocyte adhesion to endothelial
cells. MEF2C knockdown also resulted in NF-?B activation in endothelial cells.
Conversely, MEF2C overexpression by adenovirus significantly repressed TNF-?
induction of pro-inflammatory molecules, activation of NF-?B, and leukocyte
adhesion to endothelial cells. This inhibition of leukocyte adhesion by MEF2C was
partially mediated by induction of KLF2. In mice, lipopolysaccharide
(LPS)-induced leukocyte adhesion to the retinal vasculature was significantly
increased by endothelial cell-specific ablation of MEF2C. Taken together, these
results demonstrate that MEF2C is a novel negative regulator of inflammation in
endothelial cells and may represent a therapeutic target for vascular
inflammation.