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Arthritis
Volume 2012 (2012), Article ID 391567, 7 pages
http://dx.doi.org/10.1155/2012/391567
Review Article

Rheumatoid Arthritis and Primary Biliary Cirrhosis: Cause, Consequence, or Coincidence?

1Institute of Liver Studies, Division of Transplantation Immunology and Mucosal Biology, School of Medicine, King's College London, London SE5 9RS, UK
2Department of Medicine, University Hospital of Larissa, University of Thessaly Medical School, Viopolis, 41110 Larissa, Greece
3The Sheila Sherlock Liver Centre and University Department of Surgery, Royal Free Hospital, London NW32QG, UK

Received 28 July 2012; Accepted 28 September 2012

Academic Editor: Pierre Youinou

Copyright © 2012 Daniel S. Smyk et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Primary biliary cirrhosis (PBC) is a progressive cholestatic liver disease characterized serologically by cholestasis and the presence of high-titre antimitochondrial antibodies and histologically by chronic nonsuppurative cholangitis and granulomata. PBC patients often have concomitant autoimmune diseases, including arthropathies. This raises the question as to whether there are shared features in the pathogenesis of those diseases with the pathogenesis of PBC. Epidemiological and large case studies have indicated that although the incidence of rheumatoid arthritis (RA) is not significantly raised in PBC patients, there appears to be a higher rate of RA in PBC patients and their relatives. Genetic studies have demonstrated that several genes implicated in PBC have also been implicated in RA. Epigenetic studies provided a wealth of data regarding RA, but the findings on epigenetic changes in PBC are very limited. As well, certain infectious agents identified in the pathogenesis of PBC may also play a role in the pathogenesis of RA. These data suggest that although RA is not significantly present in PBC, some individuals with certain genetic traits and environmental exposures may develop both conditions. This concept may also apply to other concomitant diseases found in PBC patients.