PMID- 21292771 OWN - NLM STAT- MEDLINE DCOM- 20110628 LR - 20220330 IS - 1528-0020 (Electronic) IS - 0006-4971 (Linking) VI - 117 IP - 14 DP - 2011 Apr 7 TI - Tregs prevent GVHD and promote immune reconstitution in HLA-haploidentical transplantation. PG - 3921-8 LID - 10.1182/blood-2010-10-311894 [doi] AB - Hastening posttransplantation immune reconstitution is a key challenge in human leukocyte antigen (HLA)-haploidentical hematopoietic stem-cell transplantation (HSCT). In experimental models of mismatched HSCT, T-regulatory cells (Tregs) when co-infused with conventional T cells (Tcons) favored posttransplantation immune reconstitution and prevented lethal graft-versus-host disease (GVHD). In the present study, we evaluated the impact of early infusion of Tregs, followed by Tcons, on GVHD prevention and immunologic reconstitution in 28 patients with high-risk hematologic malignancies who underwent HLA-haploidentical HSCT. We show for the first time in humans that adoptive transfer of Tregs prevented GVHD in the absence of any posttransplantation immunosuppression, promoted lymphoid reconstitution, improved immunity to opportunistic pathogens, and did not weaken the graft-versus-leukemia effect. This study provides evidence that Tregs are a conserved mechanism in humans. FAU - Di Ianni, Mauro AU - Di Ianni M AD - Hematology and Clinical Immunology Section, Department of Clinical and Experimental Medicine, University of Perugia, Italy. mauro.diianni@cc.univaq.it FAU - Falzetti, Franca AU - Falzetti F FAU - Carotti, Alessandra AU - Carotti A FAU - Terenzi, Adelmo AU - Terenzi A FAU - Castellino, Flora AU - Castellino F FAU - Bonifacio, Elisabetta AU - Bonifacio E FAU - Del Papa, Beatrice AU - Del Papa B FAU - Zei, Tiziana AU - Zei T FAU - Ostini, Roberta Iacucci AU - Ostini RI FAU - Cecchini, Debora AU - Cecchini D FAU - Aloisi, Teresa AU - Aloisi T FAU - Perruccio, Katia AU - Perruccio K FAU - Ruggeri, Loredana AU - Ruggeri L FAU - Balucani, Chiara AU - Balucani C FAU - Pierini, Antonio AU - Pierini A FAU - Sportoletti, Paolo AU - Sportoletti P FAU - Aristei, Cynthia AU - Aristei C FAU - Falini, Brunangelo AU - Falini B FAU - Reisner, Yair AU - Reisner Y FAU - Velardi, Andrea AU - Velardi A FAU - Aversa, Franco AU - Aversa F FAU - Martelli, Massimo F AU - Martelli MF LA - eng PT - Clinical Trial PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110203 PL - United States TA - Blood JT - Blood JID - 7603509 SB - IM MH - Adult MH - Female MH - Graft vs Host Disease/immunology/*prevention & control MH - Hematologic Neoplasms/immunology/*therapy MH - *Hematopoietic Stem Cell Transplantation/adverse effects MH - Histocompatibility/*immunology MH - Histocompatibility Testing MH - Humans MH - Immune System/immunology/*physiology MH - Male MH - Middle Aged MH - Recurrence MH - T-Lymphocytes, Regulatory/immunology/*physiology/transplantation MH - Transplantation Conditioning/methods MH - Transplantation Immunology/physiology MH - Transplantation, Homologous MH - Young Adult EDAT- 2011/02/05 06:00 MHDA- 2011/06/29 06:00 CRDT- 2011/02/05 06:00 PHST- 2011/02/05 06:00 [entrez] PHST- 2011/02/05 06:00 [pubmed] PHST- 2011/06/29 06:00 [medline] AID - S0006-4971(20)45318-2 [pii] AID - 10.1182/blood-2010-10-311894 [doi] PST - ppublish SO - Blood. 2011 Apr 7;117(14):3921-8. doi: 10.1182/blood-2010-10-311894. Epub 2011 Feb 3.