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2015 ; 10
(10
): e0140105
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Mitochondrial Damage-Associated Molecular Patterns (MTDs) Are Released during
Hepatic Ischemia Reperfusion and Induce Inflammatory Responses
#MMPMID26451593
Hu Q
; Wood CR
; Cimen S
; Venkatachalam AB
; Alwayn IP
PLoS One
2015[]; 10
(10
): e0140105
PMID26451593
show ga
Ischemia / reperfusion injury (IRI) during the course of liver transplantation
enhances the immunogenicity of allografts and thus impacts overall graft outcome.
This sterile inflammatory insult is known to activate innate immunity and
propagate organ damage through the recognition of damage-associate molecular
pattern (DAMP) molecules. The purpose of the present study was to investigate the
role of mitochondrial DAMPs (MTDs) in the pathogenesis of hepatic IRI. Using in
vitro models we observed that levels of MTDs were significantly higher in both
transplantation-associated and warm IR, and that co-culture of MTDs with human
and rat hepatocytes significantly increased cell death. MTDs were also released
in an in vivo rat model of hepatic IRI and associated with increased secretion of
inflammatory cytokines (TNF-?, IL-6, and IL-10) and increased liver injury
compared to the sham group. Our results suggest that hepatic IR results in a
significant increase of MTDs both in vitro and in vivo suggesting that MTDs may
serve as a novel marker in hepatic IRI. Co-culture of MTDs with hepatocytes
showed a decrease in cell viability in a concentration dependent manner, which
indicates that MTDs is a toxic mediator participating in the pathogenesis of
liver IR injury.