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  • Title: Final results of the phase II study of rabbit anti-thymocyte globulin, ciclosporin, methylprednisone, and granulocyte colony-stimulating factor in patients with aplastic anaemia and myelodysplastic syndrome.
    Author: Kadia TM, Borthakur G, Garcia-Manero G, Faderl S, Jabbour E, Estrov Z, York S, Huang X, Pierce S, Brandt M, Koller C, Kantarjian HM, Ravandi F.
    Journal: Br J Haematol; 2012 May; 157(3):312-20. PubMed ID: 22360602.
    Abstract:
    This report describes the final results of a Phase II clinical trial investigating the efficacy of rabbit antithymocyte globulin (rATG), ciclosporin, steroids, and granulocyte colony-stimulating factor (GCSF) in patients with untreated aplastic anaemia (AA), or low to intermediate-risk and hypocellular myelodysplastic syndrome (MDS). We treated 24 patients each with AA and MDS with rATG (3·5 mg/kg/d × 5; reduced to 2·5 mg/kg/d × 5 in patients with MDS ≥ 55 years), ciclosporin (5 mg/kg orally daily × 6 months), steroids (1 mg/kg daily, tapered off over 1 month), and GCSF. The overall response rate in AA patients was 64% compared to 25% in MDS patients. The median time to response was 3 months in AA patients and 4 months in MDS patients. Pretreatment clinical characteristics, such as age, sex, blood counts, cellularity, cytogenetics, or HLA-DR15 status, did not predict for response. Response to therapy, however, predicted for improved overall survival (OS), with a 3-year OS of 89% vs. 43% in responders versus non-responders, respectively (P < 0·001). Infusion reactions occurred in about half the patients and were manageable. Myelosuppression, elevation in liver enzymes, and infections were common. The early mortality in MDS patients was 13% vs. 0% in AA patients.
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