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Immunopathogenesis of primary sclerosing cholangitis
Joy Worthington1, Sue Cullen, Roger Chapman
1Department of Gastroenterology, John Radcliffe Hospital, Headington, Oxford, UK.
Clinical Reviews in Allergy & Immunology
|May 10, 2005
Summary
Primary sclerosing cholangitis (PSC) is an immune-mediated liver disease. Research suggests gut inflammation may trigger PSC in genetically susceptible individuals via an abnormal immune response.
Area of Science:
- Hepatology
- Immunology
- Gastroenterology
Background:
- Primary sclerosing cholangitis (PSC) is a chronic cholestatic liver disease with unknown causes.
- Lymphocytic infiltration in the portal tract suggests an immune basis for PSC.
- Associations with inflammatory bowel disease and autoimmune diseases support an immune-mediated etiology.
Purpose of the Study:
- To explore the immunogenetics of Primary sclerosing cholangitis.
- To investigate the potential role of gut-derived lymphocytes in PSC pathogenesis.
- To understand how genetic susceptibility, infections, or toxins may trigger PSC.
Main Methods:
- Review of existing research on PSC immunogenetics.
- Analysis of associations between PSC and human leukocyte antigen (HLA) and non-HLA genes.
- Examination of the enterohepatic circulation pathway for immune cell migration.
Main Results:
- Several human leukocyte antigen (HLA) and non-HLA genes are implicated in PSC development.
- Lymphocytes from inflamed gut may migrate to the liver, causing hepatic disease.
- Genetic susceptibility plays a role in PSC development.
Conclusions:
- Primary sclerosing cholangitis (PSC) is likely an immune-mediated disease.
- Gut inflammation and permeability may trigger PSC in susceptible individuals.
- Further research into PSC immunogenetics and environmental triggers is warranted.