Abstract
Purpose
Using ob/ob mice as a model of non-alcoholic fatty liver disease (NAFLD), we investigated the effect of moderate alcohol intake on the development of NAFLD and molecular mechanisms involved.
Methods
Ob/ob mice were fed water or ethanol solution (2.5 g/kg body weight/day) for 6 weeks, and markers of liver injury, insulin signalling and adiponectin in visceral adipose tissue were determined.
Results
Whereas bodyweight and the degree of liver steatosis did not differ among ob/ob mouse groups, those consuming ethanol had markedly less macrovesicular hepatic fat accumulation, inflammatory alterations and significantly lower transaminase levels. Despite similarly elevated protein levels of tumour necrosis factor α, protein concentrations of plasminogen activator inhibitor 1 were significantly lower in livers of ob/ob mice consuming ethanol in comparison with controls. The hepato-protective property of moderate alcohol ingestion in ob/ob mice was associated with an induction of the sirtuin-1/adiponectin-signalling cascade in visceral fat tissue and an activation of Akt in the liver. Similar effects of moderate alcohol exposure were also found in vitro in 3T3-L1 and AML-12 cells.
Conclusion
These data suggest that moderate alcohol intake may diminish the development of NAFLD through sirtuin-1/-adiponectin-dependent signalling cascades.
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Abbreviations
- ACOX1:
-
Acyl-coenzyme A oxidase
- ADH:
-
Alcohol dehydrogenase
- Akt:
-
Protein kinase B
- AML-12:
-
Alpha mouse liver 12 cells
- AMPK:
-
Adenosine monophosphate-activated protein kinase
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- BAX:
-
BCL2-associated X protein
- b.w.:
-
Body weight
- CCL2:
-
Chemokine (c–c motif) ligand 2
- ELISA:
-
Enzyme-linked immunosorbent assay
- FAS:
-
Fatty acid synthase
- FOXO1:
-
Forkhead box O1
- GK:
-
Glucokinase
- GLUT4:
-
Glucose transporter type 4
- H&E:
-
Haematoxylin and eosin
- IRS-1/2:
-
Insulin receptor substrate 1/2
- NAFLD:
-
Non-alcoholic fatty liver disease
- NAS:
-
NAFLD activity score
- NASH:
-
Non-alcoholic steatohepatitis
- PAI-1:
-
Plasminogen activator inhibitor 1
- PEPCK:
-
Phosphoenolpyruvate carboxykinase
- PPARγ:
-
Peroxisome proliferator-activated receptor gamma
- RT-PCR:
-
Reverse transcriptase polymerase chain reaction
- SIRT1:
-
Sirtuin-1
- SREBP-1c:
-
Sterol regulatory element-binding protein 1c
- TNFα:
-
Tumour necrosis factor alpha
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Acknowledgments
This work was in part supported by a Grant from ‘Zentrum für Ernährungsmedizin (ZEM)’ and ‘BMBF (FKZ: 01EA1305)’ (IB).
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All authors declare no conflicts of interest.
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Kanuri, G., Landmann, M., Priebs, J. et al. Moderate alcohol consumption diminishes the development of non-alcoholic fatty liver disease (NAFLD) in ob/ob mice. Eur J Nutr 55, 1153–1164 (2016). https://doi.org/10.1007/s00394-015-0929-7
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DOI: https://doi.org/10.1007/s00394-015-0929-7