PMID: 11918541Mar 29, 2002Paper

A pilot study of the recombinant soluble human tumour necrosis factor receptor (p75)-Fc fusion protein in patients with myelodysplastic syndrome

British Journal of Haematology
Jaroslaw P MaciejewskiAntonio M Ristiano

Abstract

Laboratory observations suggest that, in some myelodysplastic syndromes (MDS), immune mechanisms may contribute to the impaired blood cell production. Tumor necrosis factor alpha (TNF-alpha), a potent inhibitor of haematopoiesis, has been hypothesized to mediate suppressive effects in MDS: TNF-alpha levels are elevated and correlated with marrow apoptosis and cytopenia. Inhibition of TNF-alpha production using the soluble TNF receptor (Enbrel) has been successful in rheumatoid arthritis, and we have now applied the same principle to MDS. We determined spontaneous TNF-alpha production by marrow cells in MDS; TNF-alpha production was elevated (> mean + 2 x SD of controls) in > 1/3 of patients, but did not correlate with clinical parameters. Sixteen patients participated in a 3-month pilot study of Enbrel. The drug was well tolerated and 15 patients were evaluable. Of these, one became temporarily (14 weeks) transfusion independent. In another patient, absolute neutrophil count (ANC) rose from 0.5 x 10(9)/l to 0.84 x 10(9)/l. Serious infections were seen in two out of six neutropenic patients. Progression to refractory anaemia with excess blasts in transformation (RAEBt) or leukaemia was observed in three patients. When the effect...Continue Reading

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