PMID- 10676915 OWN - NLM STAT- MEDLINE DCOM- 20000225 LR - 20191103 IS - 0037-1963 (Print) IS - 0037-1963 (Linking) VI - 37 IP - 1 DP - 2000 Jan TI - Cyclophosphamide and other new agents for the treatment of severe aplastic anemia. PG - 102-9 AB - Severe aplastic anemia (SAA) has a poor prognosis in the absence of treatment. Current accepted therapeutic strategies include allogeneic stem-cell transplantation and immunosuppression, both resulting in long-term survival in the majority of patients. Although human leukocyte antigen (HLA)-matched sibling stem-cell transplantation is highly effective, the 25% probability of finding a suitable sibling donor within a family renders this approach available to only a minority of patients. Transplantation using HLA-matched, unrelated donors carries a high risk of treatment failure along with considerable toxicity. While combined immunosuppression with both antithymocyte globulin (ATG) and cyclosporine A (CSA) produces hematologic improvement in most patients, relapse is common. Late evolution of aplastic anemia to other serious hematologic disorders, including paroxysmal nocturnal hemoglobinuria (PNH), myelodysplasia, and acute leukemia, is also a significant problem following treatment with ATG/CSA. Recently, results of immunosuppression in SAA with another potent immunosuppressive agent, cyclophosphamide, were reported in a small number of patients. The overall response rate was similar to that seen with ATG/CSA, but relapse and late clonal disease were not observed during a long period of follow-up. A larger randomized trial comparing sustained hematologic response rates to either conventional immunosuppression with ATG/CSA or high-dose cyclophosphamide and CSA is now underway; secondary end points include response duration, event-free survival, and overall survival. Additionally, a number of protocols designed to test the efficacy of alternative immunosuppressive or immunomodulatory agents are being developed. FAU - Tisdale, J F AU - Tisdale JF AD - Molecular and Clinical Hematology Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. FAU - Dunn, D E AU - Dunn DE FAU - Maciejewski, J AU - Maciejewski J LA - eng PT - Journal Article PT - Review PL - United States TA - Semin Hematol JT - Seminars in hematology JID - 0404514 RN - 0 (Antibodies, Monoclonal) RN - 0 (Immunosuppressive Agents) RN - 0 (Receptors, Interleukin-2) RN - 8N3DW7272P (Cyclophosphamide) RN - HU9DX48N0T (Mycophenolic Acid) RN - W36ZG6FT64 (Sirolimus) RN - WM0HAQ4WNM (Tacrolimus) SB - IM MH - Anemia, Aplastic/*drug therapy MH - Antibodies, Monoclonal/therapeutic use MH - Cyclophosphamide/*therapeutic use MH - Humans MH - Immunosuppressive Agents/*therapeutic use MH - Mycophenolic Acid/analogs & derivatives/therapeutic use MH - Receptors, Interleukin-2/antagonists & inhibitors/immunology MH - Sirolimus/therapeutic use MH - Tacrolimus/therapeutic use RF - 75 EDAT- 2000/02/17 09:00 MHDA- 2000/03/04 09:00 CRDT- 2000/02/17 09:00 PHST- 2000/02/17 09:00 [pubmed] PHST- 2000/03/04 09:00 [medline] PHST- 2000/02/17 09:00 [entrez] AID - S003719630000010X [pii] AID - 10.1016/s0037-1963(00)90034-9 [doi] PST - ppublish SO - Semin Hematol. 2000 Jan;37(1):102-9. doi: 10.1016/s0037-1963(00)90034-9.