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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 Arterioscler+Thromb+Vasc+Biol
2013 ; 33
(6
): 1212-20
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mRNA-binding protein ZFP36 is expressed in atherosclerotic lesions and reduces
inflammation in aortic endothelial cells
#MMPMID23559629
Zhang H
; Taylor WR
; Joseph G
; Caracciolo V
; Gonzales DM
; Sidell N
; Seli E
; Blackshear PJ
; Kallen CB
Arterioscler Thromb Vasc Biol
2013[Jun]; 33
(6
): 1212-20
PMID23559629
show ga
OBJECTIVE: We studied the expression and function of an mRNA-binding protein,
zinc finger protein-36 (ZFP36), in vascular endothelial cells in vivo and in
vitro. We tested the hypotheses that ZFP36 regulates inflammation in vascular
endothelial cells and that it functions through direct binding to target cytokine
mRNAs. We also tested whether ZFP36 inhibits nuclear factor-?B-mediated
transcriptional responses in vascular endothelial cells. APPROACH AND RESULTS:
ZFP36 was minimally expressed in healthy aorta but was expressed in endothelial
cells overlying atherosclerotic lesions in mice and humans. The protein was also
expressed in macrophage foam cells of atherosclerosis. ZFP36 was expressed in
human aortic endothelial cells in response to bacterial lipopolysaccharide,
glucocorticoid, and forskolin, but not oxidized low-density lipoproteins or
angiotensin II. Functional studies demonstrated that ZFP36 reduces the expression
of inflammatory cytokines in target cells by 2 distinct mechanisms: ZFP36
inhibits nuclear factor-?B transcriptional activation and also binds to cytokine
mRNAs, leading to reduced transcript stability. CONCLUSIONS: ZFP36 is expressed
in vascular endothelial cells and macrophage foam cells where it inhibits the
expression of proinflammatory mRNA transcripts. The anti-inflammatory effects of
ZFP36 in endothelial cells occur via both transcriptional and posttranscriptional
mechanisms. Our data suggest that enhancing vascular ZFP36 expression might
reduce vascular inflammation.
|*Gene Expression Regulation
[MESH]
|Animals
[MESH]
|Aorta
[MESH]
|Atherosclerosis/genetics/physiopathology
[MESH]
|Carrier Proteins/genetics/metabolism
[MESH]
|Cells, Cultured
[MESH]
|Cytokines/*metabolism
[MESH]
|Disease Models, Animal
[MESH]
|Endothelial Cells/cytology/*metabolism
[MESH]
|Foam Cells/cytology/*metabolism
[MESH]
|Humans
[MESH]
|Inflammation/genetics/prevention & control
[MESH]