High dose alpha-2-recombinant interferon in the treatment of malignant lymphoproliferative diseases. A pilot study.

In the presented clinical study, 10 patients with malignant lymphoproliferative diseases (2 with acute lymphoblastic leukemia, 3 with Hodgkin's disease, and 5 with non-Hodgkin's lymphoma), resistant to standard therapy, were administered alpha-2-recombinant interferon at a dosage of 120 x 10(6) IU as a continuous 48 h i.v. infusion. The second administration was performed after an interval of 1 month. A therapeutic response was seen in 50% of the patients, of them there were two complete remissions (in the two acute lymphoblastic leukemia patients) and 3 partial remissions (in 2 patients with Hodgkin's disease and in 1 patient with low malignant non-Hodgkin's lymphoma). In four patients with high malignant non-Hodgkin's lymphomas the treatment did not evoke any response, and in 1 patient with the same diagnosis progression was noted after the treatment. The toxic effects of the drug were in accord with literature data, and although high doses of alpha-2-recombinant interferon were administered, it was not necessary to interrupt the treatment in any of the patients. Considering the therapeutic effect of this immunomodulator used in the treatment of malignant lymphoproliferative diseases, our results are promising, nevertheless further studies will be required.