Synchronization of plasmapheresis and pulse cyclophosphamide in severe systemic lupus erythematosus.

Two patients with severe systemic lupus erythematosus, who had not responded to conventional therapy, were treated with plasmapheresis and subsequent pulse cyclophosphamide. This approach uses the plasmapheresis-induced proliferation of pathogenic clones for partial clonal deletion by giving large doses of cytotoxic drugs during the assumed period of increased B-cell vulnerability. Both patients had a rapid and distinct improvement in clinical symptoms and laboratory parameters, including the control of a life-threatening case of lupus pneumonitis. Their conditions were stabilized by giving low-dose cyclophosphamide for the next 6 months. At 14-month follow-up, there were no clinical signs of relapse.