[Interferon-producing and cytotoxic activity of natural killer cells in multiple sclerosis patients].

Examination of 22 patients with multiple sclerosis (MS) has revealed a decrease in the cytotoxic activity of natural killer cells (NKC), in the production of endogenic interferon (EI) in the system of NK--target cells, and in the production of alpha- and gamma-interferon by stimulated lymphocytes. Some patients showed dissociation of the cytotoxic and interferon-producing activity of NKCs. Possible mechanisms responsible for changes in NKC activity are discussed. The authors have concluded that disturbances in the NKC-EI system are manifestations of the total regulatory imbalance in the immune system.