Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28774883
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28774883
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 EMBO+Mol+Med
2017 ; 9
(9
): 1279-1293
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The cardiac microenvironment uses non-canonical WNT signaling to activate
monocytes after myocardial infarction
#MMPMID28774883
Meyer IS
; Jungmann A
; Dieterich C
; Zhang M
; Lasitschka F
; Werkmeister S
; Haas J
; Müller OJ
; Boutros M
; Nahrendorf M
; Katus HA
; Hardt SE
; Leuschner F
EMBO Mol Med
2017[Sep]; 9
(9
): 1279-1293
PMID28774883
show ga
A disturbed inflammatory response following myocardial infarction (MI) is
associated with poor prognosis and increased tissue damage. Monocytes are key
players in healing after MI, but little is known about the role of the cardiac
niche in monocyte activation. This study investigated microenvironment-dependent
changes in inflammatory monocytes after MI RNA sequencing analysis of murine
Ly6C(high) monocytes on day 3 after MI revealed differential regulation depending
on location. Notably, the local environment strongly impacted components of the
WNT signaling cascade. Analysis of WNT modulators revealed a strong upregulation
of WNT Inhibitory Factor 1 (WIF1) in cardiomyocytes-but not fibroblasts or
endothelial cells-upon hypoxia. Compared to wild-type (WT) littermates, WIF1
knockout mice showed severe adverse remodeling marked by increased scar size and
reduced ejection fraction 4 weeks after MI While FACS analysis on day 1 after MI
revealed no differences in neutrophil numbers, the hearts of WIF1 knockouts
contained significantly more inflammatory monocytes than hearts from WT animals.
Next, we induced AAV-mediated cardiomyocyte-specific WIF1 overexpression, which
attenuated the monocyte response and improved cardiac function after MI,
as compared to control-AAV-treated animals. Finally, WIF1 overexpression in
isolated cardiomyocytes limited the activation of non-canonical WNT signaling and
led to reduced IL-1? and IL-6 expression in monocytes/macrophages. Taken
together, we investigated the cardiac microenvironment's interaction with
recruited monocytes after MI and identified a novel mechanism of monocyte
activation. The local initiation of non-canonical WNT signaling shifts the
accumulating myeloid cells toward a pro-inflammatory state and impacts healing
after myocardial infarction.