PMID- 12621489 OWN - NLM STAT- MEDLINE DCOM- 20030923 LR - 20131121 IS - 0268-3369 (Print) IS - 0268-3369 (Linking) VI - 31 IP - 2 DP - 2003 Jan TI - Etoposide (VP-16) plus G-CSF mobilizes different dendritic cell subsets than does G-CSF alone. PG - 95-8 AB - Dendritic cells (DCs) are antigen-presenting cells that are critical to the generation of immunologic tumor responses. Myeloid DCs (DC1) express myeloid antigen CD11c; lymphoid DCs (DC2) express CD123(+) and are CD11c(-). Analysis of DC subsets from peripheral blood progenitor cells (PBPC) collected from normal donors mobilized with G-CSF shows a predominance of DC2 cells. Whether PBPCs mobilization by chemotherapy yields different subsets of DCs has not been studied. We analyzed DC subsets in apheresis products from 44 patients undergoing autologous stem cell transplantation from 6/00 to 5/01. Patients received either G-CSF alone (10 microg/kg per day, n=11) or etoposide (2 g/m(2)) plus G-CSF (n=33) for progenitor cell mobilization. The patients were apheresed for 2-10 days (median 3) to reach a minimum of 2.0 x 10(6) CD34(+) cells/kg. Patients receiving G-CSF alone mobilized significantly more total DC2s than did those receiving etoposide plus G-CSF (median 6.2 x 10(6)/kg vs 2.9 x 10(6)/kg, P=0.001). The DC2/DC1 ratio was also significantly different in the two groups, with the G-CSF group having a higher ratio (median 1.2 vs 0.4, P<0.001). We conclude that the combination of chemotherapy plus G-CSF yields different mobilized dendritic cell subsets than does G-CSF alone. FAU - Bolwell, B AU - Bolwell B AD - Department of Hematology and Medical Oncology, Cleveland, OH, USA. FAU - Sobecks, R AU - Sobecks R FAU - Pohlman, B AU - Pohlman B FAU - Andresen, S AU - Andresen S FAU - Theil, K AU - Theil K FAU - Serafino, S AU - Serafino S FAU - Rybicki, L AU - Rybicki L FAU - Kalaycio, M AU - Kalaycio M LA - eng PT - Comparative Study PT - Journal Article PL - England TA - Bone Marrow Transplant JT - Bone marrow transplantation JID - 8702459 RN - 0 (Recombinant Proteins) RN - 143011-72-7 (Granulocyte Colony-Stimulating Factor) RN - 6PLQ3CP4P3 (Etoposide) SB - IM MH - Adult MH - Aged MH - Cell Count MH - Dendritic Cells/classification/drug effects/*immunology MH - Etoposide/*therapeutic use MH - Female MH - Flow Cytometry/methods MH - Granulocyte Colony-Stimulating Factor/*therapeutic use MH - Hematopoietic Stem Cell Mobilization/*methods MH - Humans MH - Male MH - Middle Aged MH - Recombinant Proteins MH - *Stem Cell Transplantation MH - Transplantation, Autologous MH - Treatment Outcome EDAT- 2003/03/07 04:00 MHDA- 2003/09/25 05:00 CRDT- 2003/03/07 04:00 PHST- 2003/03/07 04:00 [pubmed] PHST- 2003/09/25 05:00 [medline] PHST- 2003/03/07 04:00 [entrez] AID - 1703791 [pii] AID - 10.1038/sj.bmt.1703791 [doi] PST - ppublish SO - Bone Marrow Transplant. 2003 Jan;31(2):95-8. doi: 10.1038/sj.bmt.1703791.