Cited by 501Liver physiology and pathologyImmune Response and InflammationDrug-Induced Hepatotoxicity and Protection

Bile Acids Induce Inflammatory Genes in Hepatocytes

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Allen, Katryn, Jaeschke, Hartmut, Copple, Bryan L.·2011·The American Journal of Pathology

Abstract

Inflammation contributes to liver injury during cholestasis. The mechanism by which cholestasis initiates an inflammatory response in the liver, however, is not known. Two hypotheses were investigated in the present studies. First, activation of Toll-like receptor 4 (TLR4), either by bacterial lipopolysaccharide or by damage-associated molecular pattern molecules released from dead hepatocytes, triggers an inflammatory response. Second, bile acids act as inflammagens, and directly activate signaling pathways in hepatocytes that stimulate production of proinflammatory mediators. Liver inflammation was not affected in lipopolysaccharide-resistant C3H/HeJ mice after bile duct ligation, indicating that Toll-like receptor 4 is not required for initiation of inflammation. Treatment of hepatocytes with bile acids did not directly cause cell toxicity but increased the expression of numerous proinflammatory mediators, including cytokines, chemokines, adhesion molecules, and other proteins that influence immune cell levels and function. Up-regulation of several of these genes in hepatocytes and in the liver after bile duct ligation required early growth response factor-1, but not farnesoid X receptor. In addition, early growth response factor-1 was up-regulated in the livers of patients with cholestasis and correlated with levels of inflammatory mediators. These data demonstrate that Toll-like receptor 4 is not required for the initiation of acute inflammation during cholestasis. In contrast, bile acids directly activate a signaling network in hepatocytes that promotes hepatic inflammation during cholestasis.

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Crossref · 10.1016/j.ajpath.2010.11.026

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Research works printed but not linked: 2

  1. Qin P, Borges-Marcucci LA, Evans MJ, Harnish DC: Bile acid signal- ing through FXR induces intracellular adhesion molecule-1 expres- Bile Acid-Induced Inflammation 185 AJP January 2011, Vol. 178, No. 1
  2. sion in mouse liver and human hepatocytes. Am J Physiol Gastrointest Liver Physiol 2005, 289:G267-G273

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Authors
Allen, K., Jaeschke, H., & Copple, B. L.
Affiliations
University of Kansas Medical Center (US)
Corresponding author
Copple, Bryan L.
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2011-01
Volume
178
Issue
1
Pages
175-186
ISSN
0002-9440 (ISSN-L)
OpenAlex
W1534017202
Cited by
501
References
65
Citations by year
2026: 25 · 2025: 35 · 2024: 33 · 2023: 47 · 2022: 37 · 2021: 39 · 2020: 44 · 2019: 42 · 2018: 33 · 2017: 43 · 2016: 35 · 2015: 22 · 2014: 28 · 2013: 22 · 2012: 7
FWCI
13.17
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (AA12916, DK073566)
  • University of Kansas Medical Center (P20 RR016475)
  • National Center for Research Resources
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
Keywords
bile acids, cholestasis, liver inflammation, TLR4, lipopolysaccharide, damage-associated molecular patterns, early growth response factor-1, farnesoid X receptor, hepatocytes, bile duct ligation, pro-inflammatory mediators, cytokines, chemokines, adhesion molecules, liver injury
MeSH terms
Receptor, Farnesoid X-Activated, Animals, Bile Acids and Salts, Cell Survival, Cholestasis, Gene Expression Regulation, Hepatitis, Lipopolysaccharides, Liver, Mice, Inbred C57BL, Neutrophils, Receptors, Cytoplasmic and Nuclear, Intercellular Adhesion Molecule-1, Vascular Cell Adhesion Molecule-1, ras-GRF1, Hepatocytes, Toll-Like Receptor 4, Mice, Early Growth Response Protein 1, Chemokine CCL7, Chemokine CXCL2, Serpin E2

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