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2017 ; 12
(11
): e0187839
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Levosimendan protects human hepatocytes from ischemia-reperfusion injury
#MMPMID29145424
Brunner SN
; Bogert NV
; Schnitzbauer AA
; Juengel E
; Moritz A
; Werner I
; Kornberger A
; Beiras-Fernandez A
PLoS One
2017[]; 12
(11
): e0187839
PMID29145424
show ga
BACKGROUND: Ischemia-reperfusion injury (IRI) is a major challenge in liver
transplantation. The mitochondrial pathway plays a pivotal role in hepatic IRI.
Levosimendan, a calcium channel sensitizer, was shown to attenuate apoptosis
after IRI in animal livers. The aim of this study was to investigate the effect
of levosimendan on apoptosis in human hepatocytes. METHODS: Primary human
hepatocytes were either exposed to hypoxia or cultured under normoxic conditions.
After the hypoxic phase, reoxygenation was implemented and cells were treated
with different concentrations of levosimendan (10ng/ml, 100ng/ml, 1000ng/ml). The
overall metabolic activity of the cells was measured using
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), and aspartate
aminotransferase (AST) levels were determined in order to quantify hepatic
injury. Fluorescence-activated cell sorting (FACS) analysis was applied to
measure necrosis and apoptosis. Finally, Western blotting was performed to
analyze apoptotic pathway proteins. RESULTS: Administration of levosimendan
during reperfusion increases the metabolic activity of human hepatocytes and
decreases AST levels. Moreover, apoptosis after IRI is reduced in treated vs.
untreated hepatocytes, and levosimendan prevents down-regulation of the
anti-apoptotic protein Bcl-2 as well as up-regulation of the pro-apoptotic
protein BAX. CONCLUSION: The present study suggests a protective effect of
levosimendan on human hepatocytes. Our findings suggest that treatment with
levosimendan during reperfusion attenuates apoptosis of human hepatocytes by
influencing BAX and Bcl-2 levels.