Ineffectiveness of interferon-gamma in the treatment of idiopathic myelofibrosis: a pilot study.
It has been proposed that interferon-gamma (IFN) inhibits collagen synthesis in myeloproliferative disorders through an inhibitory effect on PDGF and TGF-beta. We therefore evaluated the role of IFN-gamma on bone marrow fibrosis in idiopathic myelofibrosis (IMF). After a 3-month observation period, nine patients (five female, four male), median age 64 years (range 43-72 years), received 3 x 3 mU IFN-gamma/week over 6 months and were monitored after withdrawal of IFN-gamma for further 3 months. Three out of nine patients have completed the study according to the protocol. Six patients had to be withdrawn from IFN-gamma due to the following reasons: bacterial infection (three patients), splenic infarction or deterioration of splenomegaly (one patient, each) and refusal to continue IFN-gamma (one patient). Results from seven patients treated for at least 8 weeks were considered measurable. Leukopenia, initially present in one of the evaluated patients, deteriorated during IFN-gamma treatment. This patient died during the observation period shortly after withdrawal of the therapy as a result of septicemia. Transfusion-dependent anemia, initially observed in two of the evaluated patients, deteriorated during the IFN-gamma treatment. Bone marrow fibrosis increased in three patients, whereas it remained unchanged in another and improved in a further patient. Splenomegaly improved in two patients but deteriorated markedly in one. Taking these observations together, four patients had disease progression during IFN-gamma treatment, two had stable disease and one could be qualified as a partial responder. According to these data IFN-gamma cannot be considered as a treatment option for patients with IMF.
Heis-Vahidi-Fard
N
N
Department of Internal Medicine I, Division of Haematology and Blood Coagulation, Währinger Gürtel 18-20, 1090 Vienna, Austria.
Forberg
E
E
Eichinger
S
S
Chott
A
A
Lechner
K
K
Gisslinger
H
H
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000009:adverse effects / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D055728:Primary Myelofibrosis / Q000188:drug therapy*; D013163:Splenomegaly / Q000139:chemically induced
D007371:Interferon-gamma