Journal
LEUKEMIA
Volume 23, Issue 7, Pages 1297-1302Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/leu.2009.28
Keywords
rabbit ATG; cyclosporine; aplastic anemia; MDS
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Funding
- Genzyme Pharmaceutical company
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We investigated efficacy and safety of rabbit anti-thymocyte globulin (rATG), cyclosporine and granulocyte colony-stimulating factor (G-CSF) as first-line therapy for patients with aplastic anemia (AA) and low or intermediate-1 or hypoplastic myelodysplastic syndrome (MDS). rATG 3.5 mg/kg (or 2.5 mg/kg per day for patients >= 55 years with MDS) was given for 5 days. Cyclosporine (5 mg/kg) and G-CSF (5 mu g/kg) were given daily and continued for up to 6 months or longer. Responses were assessed about 3 and 6 months after therapy. Thirty-six patients have been enrolled on study and 32 patients treated; 25 were evaluable for a response (13 with AA, 12 with MDS); the rest are too early. The median age was 62 years (range, 20-83) for patients with AA and 63 (range, 42-80) for patients with MDS. Of 13 patients, 12 (92%) patients with AA responded (5 complete response (CR), 7 partial response (PR)), whereas of 12 patients, 4 (33%) patients with MDS responded (1 CR, 3 PR). For patients with AA, the median time to response (TTR) was 93 days (range, 79-623), whereas in the MDS group the median TTR was 111 days (range, 77-139). Grade III/IV toxicities were mainly cytopenias and neutropenic fever. Combination of rATG, cyclosporine and G-CSF is safe and effective as first-line treatment of AA and has significant activity in low-risk MDS. Leukemia (2009) 23, 1297-1302; doi: 10.1038/leu.2009.28; published online 26 February 2009
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