Alterations of T-cell subsets in primary biliary cirrhosis.

To determine whether abnormalities of immunoregulatory T cells are associated with primary biliary cirrhosis, we characterized peripheral blood mononuclear cells in 16 patients with primary biliary cirrhosis and compared them with 30 normal controls. For this analysis we used monoclonal antibodies to the surface antigens on helper/inducer (T4+) and suppressor (T8+) T cell subsets and to a common T cell antigen (T3+). In contrast to normal persons, patients with primary biliary cirrhosis had reduced percentages of T3+ cells. More importantly, there was a relative decrease in helper/inducer (T4+) cells in 9/16 patients and a decrease in suppressor (T8+) cells in 5/16 patients. Furthermore, clinical studies indicated that patients with a decreased suppressor cell population (increased T4+ : T8+ ratio) had more advanced disease, as reflected by serum bilirubin levels (P less than 0.05) and histological changes in the liver (P less than 0.001), than those patients with a reduced helper T cell population (decreased T4+ : T8+ ratio). These data suggest that abnormalities of immune responsiveness in primary biliary cirrhosis may have a more complex origin than a uniform alteration in one immunoregulatory T-cell subset and that these immunoregulatory cell changes vary according to the severity of the disease.