High doses of natural α‐interferon (α‐IFN) in the treatment of multiple myeloma — A pilot study from the Myeloma Group of Central Sweden (MGCS)
European Journal of Haematology(2009)
Abstract
alpha-interferon (alpha-IFN) is a biological response modifier with a dose-dependent activity. The present study on the treatment of patients with multiple myeloma with high doses of natural alpha-IFN was designed to meet this dose-dependent concept. 50 previously untreated patients with IgA and BJ myelomas and a s-Creatinine less than or equal to 200 mumol/l entered the study. Various treatment schedules were tested. The initial plan was to give the patients 30 X 10(6) U alpha-IFN daily. This dosage, however, gave unacceptable toxicity. Step-by-step decreasing dose schedules were given to the patients, 10 X 10(6) U of alpha-IFN daily for 7 consecutive d repeated every 3rd week was found to be the maximal tolerable dose that could be given to most patients. 36% (95% confidence levels: 22%-50%) of the patients responded: 41% of the IgA myelomas and 23% of BJ myelomas. Median time to response was 1.5 months and median response duration was 20 months. Impaired general condition and central nervous system and gastrointestinal-related toxicity were the main adverse reactions. Hematological side-effects were mild.
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Key words
multiple myeloma,myeloma group
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