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Intestinal microbiota in primary sclerosing cholangitis.

Johannes R Hov1, Martin Kummen

  • 1aNorwegian PSC Research Center and Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo University Hospital Rikshospitalet bInstitute of Clinical Medicine, University of Oslo, Oslo, Norway.

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Alterations in the gut microbiota are linked to primary sclerosing cholangitis (PSC). Research highlights low microbial diversity and altered bacterial taxa in PSC patients, suggesting potential biomarkers and therapeutic targets.

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Area of Science:

  • Gastroenterology and Hepatology
  • Microbiology
  • Immunology

Background:

  • The gut-liver axis plays a crucial role in the pathogenesis of primary sclerosing cholangitis (PSC).
  • Alterations in intestinal microbiota have been implicated in PSC since its initial description.

Purpose of the Study:

  • To review recent studies on the intestinal microbiota in human PSC and experimental models.
  • To discuss the potential of gut microbiota as biomarkers and therapeutic targets for PSC.

Main Methods:

  • Analysis of eight cross-sectional studies of human PSC involving microbiota profiling (mucosal or fecal).
  • Review of experimental models of PSC, including germ-free animal studies.

Main Results:

  • A consistent pattern of low microbial diversity and altered bacterial taxa in the gut microbiota of PSC patients was observed across studies.
  • Experimental models show that manipulating the gut microbiota can either aggravate or attenuate PSC, depending on host factors and disease mechanisms.

Conclusions:

  • The findings provide a strong rationale for investigating the functional impact of gut microbial alterations in PSC pathogenesis.
  • Gut microbiota represent a promising area for developing biomarkers and therapeutic strategies for early clinical translation in PSC.