Document Detail


Dietary olive oil prevents carbon tetrachloride-induced hepatic fibrosis in mice.
MedLine Citation:
PMID:  19506795     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: The specific purpose of this study was to investigate the effects of dietary olive oil on hepatic fibrosis induced by chronic administration of carbon tetrachloride (CCl(4)) in the mouse. In addition, the effects of oleic acid, a major component of olive oil, on activation of hepatic stellate cells (HSCs) were investigated in vitro. METHODS: Mice were fed liquid diets containing either corn oil (control, AIN-93) or olive oil (6.25 g/L) throughout experiments. Animals were treated with CCl(4) for 4 weeks intraperitoneally. The mRNA expression of TGF-beta1 and collagen 1alpha2 (col1alpha2) in the liver was assessed by reverse transcriptase-polymerase chain reaction (RT-PCR). The HSCs were isolated from mice, and co-cultured with either oleic acid (100 microM) or linoleic acid (100 microM) for 2 days. The expression of alpha-smooth muscle actin (alpha-SMA) was assessed by immunohistochemistry. In addition, the production of hydroxyproline was determined. RESULTS: Serum alanine aminotransferase levels and the mRNA expression of TGF-beta and collalpha2 were significantly reduced by treatment of olive oil. Dietary olive oil blunted the expression of alpha-SMA in the liverand liver injury and hepatic fibrosis were prevented by treatment of olive oil. The number of alpha-SMA positive cells was significantly lower in HSCs co-cultured with oleic acid than in those co-cultured with linoleic acid. Concentration of hydroxyproline in culture medium was significantly lower in cells co-cultured with oleic acid than in the control. CONCLUSIONS: Dietary olive oil prevents CCl(4)-induced tissue injury and fibrosis in the liver. Since oleic acid inhibited activation of HSCs, oleic acid may play a key role on this mechanism.
Authors:
Nobuyuki Tanaka; Hiroshi Kono; Kenichi Ishii; Naohiro Hosomura; Hideki Fujii
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article     Date:  2009-06-09
Journal Detail:
Title:  Journal of gastroenterology     Volume:  44     ISSN:  1435-5922     ISO Abbreviation:  J. Gastroenterol.     Publication Date:  2009  
Date Detail:
Created Date:  2009-09-18     Completed Date:  2010-01-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9430794     Medline TA:  J Gastroenterol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  983-90     Citation Subset:  IM    
Affiliation:
First Department of Surgery, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, 409-3898, Japan.
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MeSH Terms
Descriptor/Qualifier:
Actins / drug effects,  metabolism
Animals
Carbon Tetrachloride / toxicity
Collagen Type I / genetics
Corn Oil / pharmacology
Dietary Fats, Unsaturated / pharmacology*
Gene Expression Regulation / drug effects
Hepatic Stellate Cells / drug effects,  metabolism
Linoleic Acid / pharmacology
Liver Cirrhosis / chemically induced,  prevention & control*
Male
Mice
Mice, Inbred C57BL
Oleic Acid / isolation & purification,  pharmacology*
Plant Oils / chemistry,  pharmacology*
Transforming Growth Factor beta1 / genetics
Chemical
Reg. No./Substance:
0/Actins; 0/Collagen Type I; 0/Dietary Fats, Unsaturated; 0/Plant Oils; 0/Transforming Growth Factor beta1; 0/alpha-smooth muscle actin, mouse; 112-80-1/Oleic Acid; 2197-37-7/Linoleic Acid; 56-23-5/Carbon Tetrachloride; 8001-25-0/olive oil; 8001-30-7/Corn Oil

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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