PMID- 15010368 OWN - NLM STAT- MEDLINE DCOM- 20040827 LR - 20210206 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 104 IP - 1 DP - 2004 Jul 1 TI - Reconstitution dynamics of plasmacytoid and myeloid dendritic cell precursors after allogeneic myeloablative hematopoietic stem cell transplantation. PG - 281-9 AB - Dendritic cells (DCs) are fundamental for immunity. We investigated reconstitution of plasmacytoid DC (PDC) and myeloid DC (My-DC) precursors in the first 2 months after allogeneic hematopoietic stem cell transplantation (Allo-HSCT). Circulating DCs were monitored from the earliest phase of hematopoietic reconstitution in 43 children given standard therapy to prevent graft-versus-host disease (GVHD) and either treated or untreated with granulocyte colony-stimulating factor (G-CSF) after HSCT. In patients without GVHD, both My-DCs and PDCs reached consistently high absolute values during the initial phase. Time of engraftment did not differ between My-DCs and PDCs, regardless of administration of G-CSF. Treatment with G-CSF (1) accelerated early recovery of My-DC absolute numbers; (2) was associated with lower numbers of both My-DCs and PDCs in the later phase; and (3) significantly reduced the proportion of interleukin-12 (IL-12)-secreting cells. In some patients who developed acute GVHD, we found high numbers of circulating DC precursors during the early phase of this complication. However, treatment with steroids invariably induced rapid decrease of PDCs. Altogether, these data provide an evaluation of DC release after Allo-HSCT, indicate that postgrafting administration of G-CSF impairs the appearance of IL-12-producing DCs, and suggest that DC homeostasis may be disrupted at onset of GVHD. FAU - Fagnoni, Francesco F AU - Fagnoni FF AD - Dipartimento di Oncologia, Fondazione S. Maugeri, Istituto di Ricovero e Cura a Carattere Scientifico Clinica del Lavoro e della Riabilitazione, Istituto Scientifico di Pavia, Italy. ffagnoni@fsm.it FAU - Oliviero, Barbara AU - Oliviero B FAU - Giorgiani, Giovanna AU - Giorgiani G FAU - De Stefano, Piero AU - De Stefano P FAU - Deho, Anna AU - Deho A FAU - Zibera, Carlo AU - Zibera C FAU - Gibelli, Nadia AU - Gibelli N FAU - Maccario, Rita AU - Maccario R FAU - Da Prada, GianAntonio AU - Da Prada G FAU - Zecca, Marco AU - Zecca M FAU - Locatelli, Franco AU - Locatelli F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20040309 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antigens, CD) RN - 0 (Cytokines) RN - 0 (Lipopolysaccharides) RN - 0 (Steroids) RN - 143011-72-7 (Granulocyte Colony-Stimulating Factor) SB - IM MH - Adolescent MH - Antigens, CD/immunology MH - Case-Control Studies MH - Cell Differentiation MH - Child MH - Child, Preschool MH - Cytokines/metabolism MH - Dendritic Cells/*cytology/immunology/ultrastructure MH - Female MH - Graft vs Host Disease/blood/drug therapy/immunology MH - Granulocyte Colony-Stimulating Factor/therapeutic use MH - Hematopoietic Stem Cell Transplantation/*adverse effects/methods MH - Humans MH - Leukocyte Count MH - Lipopolysaccharides/immunology/pharmacology MH - Male MH - Myeloid Cells/*cytology/immunology/ultrastructure MH - Plasma Cells/*cytology/immunology/ultrastructure MH - Postoperative Complications/blood/drug therapy/immunology MH - Prospective Studies MH - Steroids/therapeutic use MH - Time Factors MH - Transplantation Conditioning/*adverse effects/methods MH - Transplantation, Homologous MH - Treatment Outcome EDAT- 2004/03/11 05:00 MHDA- 2004/08/28 05:00 CRDT- 2004/03/11 05:00 PHST- 2004/03/11 05:00 [pubmed] PHST- 2004/08/28 05:00 [medline] PHST- 2004/03/11 05:00 [entrez] AID - S0006-4971(20)54537-0 [pii] AID - 10.1182/blood-2003-07-2443 [doi] PST - ppublish SO - Blood. 2004 Jul 1;104(1):281-9. doi: 10.1182/blood-2003-07-2443. Epub 2004 Mar 9.