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Distinct immune surveillance in primary biliary cholangitis and primary sclerosing cholangitis is linked with discrete cholangiocarcinoma risk

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HEPATOLOGY COMMUNICATIONS
卷 7, 期 9, 页码 -

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LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/HC9.0000000000000218

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Primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC) are two significant autoimmune liver diseases. PBC primarily affects small bile duct epithelial cells in women, while PSC predominantly affects medium and large intrahepatic and extrahepatic bile duct epithelial cells in men. Cholangiocarcinoma (CCA) is a malignancy arising from cholangiocytes and its incidence is increasing worldwide. Although PBC patients rarely develop CCA compared to PSC patients, understanding the differences in immune surveillance mechanisms is crucial for effective diagnosis and treatment.
Primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC) are 2 major liver autoimmune diseases. PBC is common in women and primarily affects intrahepatic small bile duct epithelial cells, known as cholangiocytes. In contrast, PSC is dominant in men and primarily affects medium and big intrahepatic and extrahepatic bile duct epithelial cells. Cholangiocarcinoma (CCA) is a malignancy arising from cholangiocytes, and its incidence is increasing worldwide in both men and women. Numerous retrospective and clinical studies have suggested that PBC patients rarely develop CCA compared to PSC patients. CCA is accountable for the higher deaths in PSC patients due to ineffective therapies and our inability to diagnose the disease at an early stage. Therefore, it is paramount to understand the differences in immune surveillance mechanisms that render PBC patients more resistant while PSC patients are susceptible to CCA development. Here, we review several potential mechanisms contributing to differences in the susceptibility to CCA in PBC versus PSC patients.

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