Anti-inflammatory consequences of bile acid accumulation in virus-infected bile duct ligated mice

PLoS One. 2018 Jun 28;13(6):e0199863. doi: 10.1371/journal.pone.0199863. eCollection 2018.

Abstract

Cholestatic patients exhibiting high bile acid serum levels were reported to be more susceptible to bacterial and viral infections. Animal studies in bile duct ligated (BDL) mice suggest that cholestasis leads to an aggravation of hepatic bacterial infections. We have investigated the impact of cholestasis on mouse cytomegalovirus (MCMV)-induced immune responses and viral replication. While MCMV did not aggravate BDL-induced liver damage, BDL markedly reduced MCMV-triggered chemokine expression and immune cell recruitment to the liver. MCMV-infected BDL mice showed diminished trafficking of Ly6C+/F4/80+ myeloid cells and NK1.1+ NK cells to the liver compared to MCMV infected control mice. Moreover, virus-driven expression of CCL7, CCL12, CXCL9 and CXCL10 was clearly impaired in BDL- compared to sham-operated mice. Furthermore, production of the anti-inflammatory cytokine IL-10 was massively augmented in infected BDL mice. In contrast, intra- and extrahepatic virus replication was unaltered in BDL-MCMV mice when compared to sham-MCMV mice. Cholestasis in the BDL model severely impaired pathogen-induced chemokine expression in the liver affecting CCR2- and CXCR3-dependent cell trafficking. Cholestasis resulted in reduced recruitment of inflammatory monocytes and NK cells to the liver.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bile Acids and Salts / immunology*
  • Bile Ducts / immunology*
  • Bile Ducts / pathology
  • Bile Ducts / virology
  • Cell Movement / immunology*
  • Chemokines / immunology
  • Cholestasis / immunology*
  • Cholestasis / pathology
  • Cholestasis / virology*
  • Herpesviridae Infections / immunology*
  • Herpesviridae Infections / pathology
  • Humans
  • Inflammation / immunology
  • Inflammation / pathology
  • Inflammation / virology
  • Killer Cells, Natural / immunology*
  • Killer Cells, Natural / pathology
  • Ligation
  • Male
  • Mice
  • Monocytes / immunology*
  • Monocytes / pathology
  • Muromegalovirus / physiology*
  • Virus Replication / immunology*

Substances

  • Bile Acids and Salts
  • Chemokines

Grants and funding

This study was funded by the German Research Foundation (DFG) through Sonderforschungsbereich 974 ‘Communication and system relevance in liver damage and regeneration’, Project A09. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.