title: CD3+ cell dose and disease status are important factors determining clinical outcomes in patients undergoing unmanipulated haploidentical blood and marrow transplantation after conditioning including antithymocyte globulin.
abstract: Haploidentical transplantation is a feasible alternative for patients with life-threatening hematologic diseases who lack a matched donor. Factors affecting the clinical outcomes of haploidentical transplantation remain under investigation. We analyzed 157 consecutive patients with leukemia who underwent transplantation with nonmanipulated granulocyte colony-stimulating factor (G-CSF)-mobilized marrow and peripheral blood cells (G-BMPBs) from haploidentical donors after receiving myeloablative chemotherapy (Ara-C + BuCy + antithymocyte globulin). Follow up observations after transplantation were made from 48 days to 1191 days (median, 448 days). Multivariate analysis indicated that the cohort given higher doses of CD3(+) cells (> or = 177 x 10(6) /kg) in allograft transplantation had a significantly lower treatment-related mortality (TRM) (relative risk [RR] = 0.35; 95% CI = 0.16-0.77; P = .0090), better leukemia-free survival (LFS) (RR = 0.46; 95% CI = 0.26-0.84; P = .0106), and better overall survival (OS) (RR = 0.42; 95% CI = 0.23-0.78; P = .0058). Inversely, advanced-stage disease was a strong predictor of greater posttransplantation relapse (RR = 3.48; 95% CI = 1.26- 9.60; P = .0159), worse LFS (RR = 2.56; 95% CI = 1.33-4.95; P = .0050), and worse OS (RR = 2.77; 95% CI = 1.39-5.53; P = .0038). A high number of CD3(+) cells (> 177 x 10(6)/kg) given to patients resulted in statistically less TRM and more intensive graft versus leukemia effect without producing more severe grades of GVHD, all resulting in a significantly better overall clinical outcome from haploidentical transplantation.
authors.affiliation: Peking University, People's Hospital, Beijing, China. lujialidong@yahoo.com.cn
authors.forename: Lujia
authors.initials: L
authors.lastname: Dong
authors.forename: Tong
authors.initials: T
authors.lastname: Wu
authors.forename: Mei-Jie
authors.initials: MJ
authors.lastname: Zhang
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Gao
authors.forename: Dao-Pei
authors.initials: DP
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D000328:Adult; D000961:Antilymphocyte Serum / Q000627:therapeutic use*; D016026:Bone Marrow Transplantation / Q000401:mortality; D017252:CD3 Complex / Q000627:therapeutic use; D002648:Child; D002681:China / Q000453:epidemiology; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D020544:Graft vs Leukemia Effect; D006680:HLA Antigens / Q000009:adverse effects / Q000276:immunology; D006238:Haploidy; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects / Q000401:mortality*; D006801:Humans; D053208:Kaplan-Meier Estimate; D007938:Leukemia / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000628:therapy*; D036102:Peripheral Blood Stem Cell Transplantation / Q000401:mortality; D016176:T-Lymphocyte Subsets / Q000637:transplantation*; D019172:Transplantation Conditioning / Q000379:methods; D014184:Transplantation, Homologous / Q000009:adverse effects / Q000401:mortality
chemical_list: D000961:Antilymphocyte Serum; D017252:CD3 Complex; D006680:HLA Antigens