aberrant expression of hladr antigens by abnormal bile ducts in pbc and chronic aggressive hepatitis or cirrhosis of viral etiology is probably induced by gamma-interferon , liberated by intra-epithelial lymphocytes , and may serve to enhance the immune response , either by attracting hladr-restricted cytotoxic t-cells or by the presentation of non-self antigens at the surface of bile duct epithelium .
C0003320
antigens
C0301872
immune response