[Immunologic disturbances in psoriatic arthropathy (author's transl)].

It was observed in 51 cases of psoriatic arthropathy (PA) an increase of blood IgA and a decrease of IgM, a not significant rise of the level of circulating immune complexes, a positive Waaler-Rose reaction in 9.7% of cases and the presence of antigammaglobulin factors (generally of IgG type) in 55,5% of studied patients. Moreover, it was noted a significant decrease of T lymphocytes as detected by E and "active" E rosettes, of EA-gamma rosettes (ox erythrocytes) and an increase of the percentage of high avidity Fc-gamma receptor bearing cells. Lymphocytes responses to mitogens were normal or slightly decreased for Concanavalin A. No correlation was found between the immunological data and the clinical features.