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SHR Neuro Cancer Cardio Lipid

Fickert, P; Stöger, U; Fuchsbichler, A; Moustafa, T; Marschall, HU; Weiglein, AH; Tsybrovskyy, O; Jaeschke, H; Zatloukal, K; Denk, H; Trauner, M.
A new xenobiotic-induced mouse model of sclerosing cholangitis and biliary fibrosis.
Am J Pathol. 2007; 171(2):525-536 [OPEN ACCESS]
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Authors Med Uni Graz:
Denk Helmut
Fickert Peter
Leb-Stöger Ulrike
Moustafa Tarek
Trauner Michael
Tsybrovskyy Oleksiy
Weiglein Andreas
Zatloukal Kurt
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Number of Figures: 11
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Abstract:
Xenobiotics and drugs may lead to cholangiopathies and biliary fibrosis, but the underlying mechanisms are largely unknown. Therefore, we aimed to characterize the cause and consequences of hepatobiliary injury and biliary fibrosis in 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC)-fed mice as a novel model of xenobiotic-induced cholangiopathy. Liver morphology, markers of inflammation, cell proliferation, fibrosis, bile formation, biliary porphyrin secretion, and hepatobiliary transporter expression were studied longitudinally in DDC- and control diet-fed Swiss albino mice. DDC feeding led to increased biliary porphyrin secretion and induction of vascular cell adhesion molecule, osteopontin, and tumor necrosis factor-alpha expression in bile duct epithelial cells. This was associated with a pronounced pericholangitis with a significantly increased number of CD11b-positive cells, ductular reaction, and activation of periductal myofibroblasts, leading to large duct disease and a biliary type of liver fibrosis. After 4 weeks, we constantly observed intraductal porphyrin pigment plugs. Glutathione and phospholipid excretion significantly decreased over time. Expression of Ntcp, Oatp4, and Mrp2 was significantly reduced, whereas Bsep expression remained unchanged and adaptive Mrp3 and Mrp4 expression was significantly induced. We demonstrate that DDC feeding in mice leads to i) a reactive phenotype of cholangiocytes and bile duct injury, ii) pericholangitis, periductal fibrosis, ductular reaction, and consequently portal-portal bridging, iii) down-regulation of Mrp2 and impaired glutathione excretion, and iv) segmental bile duct obstruction. This model may be valuable to investigate the mechanisms of xenobiotic-induced chronic cholangiopathies and its sequels including biliary fibrosis.
Find related publications in this database (using NLM MeSH Indexing)
Animals -
Bile Acids and Salts - metabolism
Bile Ducts - drug effects Bile Ducts - metabolism Bile Ducts - pathology
Cholangitis, Sclerosing - chemically induced Cholangitis, Sclerosing - genetics Cholangitis, Sclerosing - metabolism
Cholesterol - metabolism
Dicarbethoxydihydrocollidine - administration & dosage Dicarbethoxydihydrocollidine - toxicity
Disease Models, Animal -
Glutathione - metabolism
Hydroxyproline - metabolism
Immunohistochemistry -
In Situ Hybridization -
Liver - drug effects Liver - metabolism Liver - pathology
Liver Cirrhosis, Biliary - chemically induced Liver Cirrhosis, Biliary - genetics Liver Cirrhosis, Biliary - metabolism
Male -
Mice -
Models, Biological -
Multidrug Resistance-Associated Proteins - metabolism
Osteopontin - metabolism
Phospholipids - metabolism
Time Factors -
Tumor Necrosis Factor-alpha - genetics
Xenobiotics - administration & dosage Xenobiotics - toxicity

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