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Conditioning Regimens

CD52 and CD45 monoclonal antibodies for reduced intensity hemopoietic stem cell transplantation from HLA matched and one antigen mismatched unrelated donors

Bone Marrow Transplantation volume 35, pages 1127–1132 (2005)Cite this article

Summary:

Allogeneic hemopoietic stem cell transplantation (HSCT) is the only curative option for many patients with hematological malignancies. Since many of these patients lack HLA-identical sibling donors and are older or have comorbidity, a fully ablative HSCT is not feasible and an alternative approach is required. We studied 22 consecutive patients who could not have myeloablative conditioning because of comorbidity or age – 21/22 being over the age of 50 years (median 58 years range 20–70 years). A conditioning regimen consisting of fludarabine, total body radiation 450 cGy and alemtuzumab (CD52 mAb) was used for 15 patients. A second group of seven patients received CD45 monoclonal antibodies in addition. Unrelated donor stem cells were HLA matched (15 patients – 68%) or one locus mismatched (seven patients – 32%). In all, 16 patients had high-risk disease, including 12 with active malignancy at the time of transplant. With a median follow-up of 715 (216–1470) days, nonrelapse mortality, actuarial event-free and overall survival is 27, 45 and 45%, respectively. Hence the outcome of reduced intensity HSCT with lymphodepleting antibodies in older patients with intermediate/high-risk hematological malignancies appears comparable to that obtained with fully ablative transplantation in younger patients, even when these older recipients lack HLA-identical sibling donors.

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Authors and Affiliations

  1. Department of Medicine, Baylor College of Medicine, Houston, TX, USA

    U Popat, G Carrum, R May, R A Krance, H E Heslop & M K Brenner

  2. Center for Gene and Cell Therapy, Baylor College of Medicine, Houston, TX, USA

    U Popat, G Carrum, R May, R Lamba, R Lamba, R A Krance, H E Heslop & M K Brenner

  3. The Methodist Hospital, Houston, TX, USA

    U Popat, G Carrum, R May, R Lamba, R A Krance, H E Heslop & M K Brenner

  4. Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA

    R A Krance, H E Heslop & M K Brenner

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  1. U Popat
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Correspondence to U Popat.

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Popat, U., Carrum, G., May, R. et al. CD52 and CD45 monoclonal antibodies for reduced intensity hemopoietic stem cell transplantation from HLA matched and one antigen mismatched unrelated donors. Bone Marrow Transplant 35, 1127–1132 (2005). https://doi.org/10.1038/sj.bmt.1704975

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