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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 PLoS+One
2017 ; 12
(5
): e0176676
Nephropedia Template TP
gab.com Text
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English Wikipedia
The cardiac glycoside ouabain activates NLRP3 inflammasomes and promotes cardiac
inflammation and dysfunction
#MMPMID28493895
Kobayashi M
; Usui-Kawanishi F
; Karasawa T
; Kimura H
; Watanabe S
; Mise N
; Kayama F
; Kasahara T
; Hasebe N
; Takahashi M
PLoS One
2017[]; 12
(5
): e0176676
PMID28493895
show ga
Cardiac glycosides such as digoxin are Na+/K+-ATPase inhibitors that are widely
used for the treatment of chronic heart failure and cardiac arrhythmias; however,
recent epidemiological studies have suggested a relationship between digoxin
treatment and increased mortality. We previously showed that nucleotide-binding
oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3)
inflammasomes, which regulate caspase-1-dependent interleukin (IL)-1? release,
mediate the sterile cardiovascular inflammation. Because the Na+/K+-ATPase is
involved in inflammatory responses, we investigated the role of NLRP3
inflammasomes in the pathophysiology of cardiac glycoside-induced cardiac
inflammation and dysfunction. The cardiac glycoside ouabain induced cardiac
dysfunction and injury in wild-type mice primed with a low dose of
lipopolysaccharide (LPS), although no cardiac dysfunction was observed in mice
treated with either ouabain or LPS alone. Ouabain also induced cardiac
inflammatory responses, such as macrophage infiltration and IL-1? release, when
mice were primed with LPS. These cardiac manifestations were all significantly
attenuated in mice deficient in IL-1?. Furthermore, deficiency of NLRP3
inflammasome components, NLRP3 and caspase-1, also attenuated ouabain-induced
cardiac dysfunction and inflammation. In vitro experiments revealed that ouabain
induced NLRP3 inflammasome activation as well as subsequent IL-1? release from
macrophages, and this activation was mediated by K+ efflux. Our findings
demonstrate that cardiac glycosides promote cardiac inflammation and dysfunction
through NLRP3 inflammasomes and provide new insights into the mechanisms
underlying the adverse effects of cardiac glycosides.