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2017 ; 7
(ä): 46324
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The valosin-containing protein is a novel mediator of mitochondrial respiration
and cell survival in the heart in vivo
#MMPMID28425440
Lizano P
; Rashed E
; Stoll S
; Zhou N
; Wen H
; Hays TT
; Qin G
; Xie LH
; Depre C
; Qiu H
Sci Rep
2017[Apr]; 7
(ä): 46324
PMID28425440
show ga
The valosin-containing protein (VCP) participates in signaling pathways essential
for cell homeostasis in multiple tissues, however, its function in the heart in
vivo remains unknown. Here we offer the first description of the expression,
function and mechanism of action of VCP in the mammalian heart in vivo in both
normal and stress conditions. By using a transgenic (TG) mouse with
cardiac-specific overexpression (3.5-fold) of VCP, we demonstrate that VCP is a
new and powerful mediator of cardiac protection against cell death in vivo, as
evidenced by a 50% reduction of infarct size after ischemia/reperfusion versus
wild type. We also identify a novel role of VCP in preserving mitochondrial
respiration and in preventing the opening of mitochondrial permeability
transition pore in cardiac myocytes under stress. In particular, by genetic
deletion of inducible isoform of nitric oxide synthase (iNOS) from VCP TG mouse
and by pharmacological inhibition of iNOS in isolated cardiac myocytes, we reveal
that an increase of expression and activity of iNOS in cardiomyocytes by VCP is
an essential mechanistic link of VCP-mediated preservation of mitochondrial
function. These data together demonstrate that VCP may represent a novel
therapeutic avenue for the prevention of myocardial ischemia.
|*Cell Respiration/genetics
[MESH]
|*Cell Survival/genetics
[MESH]
|Adenosine Diphosphate/metabolism
[MESH]
|Animals
[MESH]
|Biomarkers
[MESH]
|Female
[MESH]
|Gene Deletion
[MESH]
|Gene Expression
[MESH]
|Male
[MESH]
|Mice
[MESH]
|Mice, Transgenic
[MESH]
|Mitochondria/genetics/*metabolism
[MESH]
|Mitochondrial Membrane Transport Proteins/genetics/metabolism
[MESH]