title: 188Re-labeled anti-CD66 monoclonal antibody in stem cell transplantation for patients with high-risk acute myeloid leukemia.
abstract: We have intensified the conditioning regimen prior to stem cell transplantation in 57 patients with high-risk AML and MDS by treating patients with a 188Re-labeled anti-CD66 monoclonal antibody. Dosimetry was performed prior to therapy and a favorable dosimetry was observed in all cases. Radioimmunotherapy with the labeled antibody provided a mean of 15.5 Gy of additional radiation to the marrow, the kidney was the normal organ receiving the highest dose of supplemental radiation (mean 7.4 Gy): Radioimmunotherapy was followed by standard full-dose conditioning with total body irradiation (12 Gy) (n = 30) or busulfan (n = 27) and high-dose cyclophosphamide +/- thiotepa. Patients subsequently received a T cell depleted allogeneic graft from a HLA-compatible family donor (n = 24), a matched unrelated donor (n = 23) or a haploidentical family donor (n = 6). In four patients, an unmanipulated autologous graft was used. Infusion-related toxicity due to the labeled antibody was minimal and no increase in treatment-related mortality due to the radioimmunoconjugate was observed. Day +30 and day +100 mortalities were 3 and 7%, respectively, and after a median follow-up of 26 months treatment-related mortality was 30%. Late renal toxicity was observed in 14% of patients. The disease-free survival rate for 44 patients in 1 or 2 CR or in very good PR (< 15% blasts in the marrow at transplant) is 64% with only 8% disease-free survival for those with > 15% blasts in the marrow at transplant.
authors.affiliation: Department of Hematology/Oncology, Ulm University Hospital, Robert-Koch-Strasse 8, 89081 Ulm, Germany. donald.bunjes@medizin.uni-ulm.de
authors.forename: Donald
authors.initials: D
authors.lastname: Bunjes
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000276:immunology*; D000943:Antigens, Differentiation / Q000276:immunology*; D001854:Bone Marrow Cells / Q000276:immunology; D015815:Cell Adhesion Molecules; D003131:Combined Modality Therapy; D005260:Female; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects / Q000379:methods* / Q000401:mortality; D006801:Humans; D018796:Immunoconjugates / Q000493:pharmacokinetics / Q000627:therapeutic use* / Q000633:toxicity; D007951:Leukemia, Myeloid / Q000150:complications / Q000401:mortality / Q000628:therapy*; D008212:Lymphocyte Depletion; D008297:Male; D008875:Middle Aged; D009928:Organ Specificity; D016499:Radioimmunotherapy / Q000009:adverse effects / Q000379:methods* / Q000401:mortality; D011868:Radioisotopes / Q000627:therapeutic use* / Q000633:toxicity; D012211:Rhenium / Q000627:therapeutic use* / Q000633:toxicity; D016879:Salvage Therapy / Q000379:methods; D016019:Survival Analysis; D019172:Transplantation Conditioning / Q000009:adverse effects / Q000379:methods / Q000401:mortality; D014184:Transplantation, Homologous; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000943:Antigens, Differentiation; C069847:CD66 antigens; D015815:Cell Adhesion Molecules; D018796:Immunoconjugates; D011868:Radioisotopes; D012211:Rhenium