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Related Experiment Video

Updated: Jun 12, 2026

Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis

Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis

Published on: February 10, 2015

Bile acids decrease intracellular bilirubin levels in the cholestatic liver: implications for bile acid-mediated

Lucie Muchova¹, Katerina Vanova, Jaroslav Zelenka

¹Institute of Clinical Biochemistry and Laboratory Diagnostics, Charles University, Prague, Czech Republic. lucie.muchova@lf1.cuni.cz

Journal of Cellular and Molecular Medicine

|June 4, 2010

Summary

In cholestasis, bile acids (BA) increase oxidative stress, while bilirubin acts as an antioxidant. However, BA reduce intracellular bilirubin, increasing liver damage susceptibility.

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Last Updated: Jun 12, 2026

Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis

Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis

Published on: February 10, 2015

Area of Science:

Biochemistry
Hepatology
Toxicology

Background:

Cholestasis is characterized by elevated bile acids (BA) and bilirubin.
BA contribute to liver damage via oxidative stress, whereas bilirubin possesses antioxidant properties.
The interplay between BA, bilirubin, and oxidative stress in cholestasis requires further elucidation.

Purpose of the Study:

To investigate the roles of bilirubin and BA in mediating oxidative stress in a rat model of cholestasis.
To assess the impact of bile duct ligation (BDL) on cholestatic markers, antioxidant capacity, lipid peroxidation, and heme oxygenase (HO) activity.
To examine the in vitro effects of taurocholic acid (TCA) and bilirubin on oxidative stress markers in liver cells.

Main Methods:

Adult female Wistar and Gunn rats underwent bile duct ligation (BDL) or sham surgery.
Plasma and liver tissues were analyzed for cholestatic markers, antioxidant capacity, lipid peroxidation, and HO activity.
In vitro experiments utilized HepG2-rNtcp cells exposed to TCA and bilirubin.

Main Results:

Plasma bilirubin levels correlated positively with antioxidant capacity in BDL rats.
BDL increased plasma antioxidant capacity but elevated liver lipid peroxidation and decreased liver HO activity.
TCA exacerbated lipid peroxidation in Wistar rat liver homogenates and reduced HO activity and bilirubin levels in HepG2-rNtcp cells.

Conclusions:

Plasma bilirubin acts as an endogenous antioxidant, potentially counteracting BA's pro-oxidative effects in circulation.
In obstructive cholestasis, BA reduce intracellular bilirubin, rendering hepatocytes more vulnerable to oxidative damage.
Understanding this BA-bilirubin-oxidative stress axis is crucial for managing cholestatic liver injury.