PMID- 10022543 OWN - NLM STAT- MEDLINE DCOM- 19990413 LR - 20061115 IS - 1043-0342 (Print) IS - 1043-0342 (Linking) VI - 10 IP - 2 DP - 1999 Jan 20 TI - High level of retrovirus-mediated gene transfer into dendritic cells derived from cord blood and mobilized peripheral blood CD34+ cells. PG - 175-87 AB - Dendritic cells (DCs), the most potent antigen-presenting cells, can be generated from CD34+ hematopoietic stem cells and used for generating therapeutic immune responses. To develop immunotherapy protocols based on genetically modified DCs, we have investigated the conditions for high-level transduction of a large amount of CD34+-derived DCs. Thus, we have used an efficient and clinically applicable protocol for the retroviral transduction of cord blood (CB) or mobilized peripheral blood (MPB) CD34+ cells based on infection with gibbon ape leukemia virus (GALV)-pseudotyped retroviral vectors carrying the nls-LacZ reporter gene. Infected cells have been subsequently cultured under conditions allowing their dendritic differentiation. The results show that using a growth factor combination including granulocyte-macrophage colony-stimulating factor plus tumor necrosis factor alpha plus interleukin 4 plus stem cell factor plus Flt3 ligand, more than 70% of DCs derived from CB or MPB CD34+ cells can be transduced. Semiquantitative PCR indicates that at least two proviral copies per cell were detected. Transduced DCs retain normal immunophenotype and potent T cell stimulatory capacity. Finally, by using a semisolid methylcellulose assay for dendritic progenitors (CFU-DCs), we show that more than 90% of CFU-DCs can be transduced. Such a highly efficient retrovirus-mediated gene transfer into CD34+-derived DCs makes it possible to envision the use of this methodology in clinical trials. FAU - Movassagh, M AU - Movassagh M AD - Biologie et Therapie des Pathologies Immunitaires, ESA CNRS 7087 CERVI, CHU Pitie Salpetriere, Paris, France. FAU - Baillou, C AU - Baillou C FAU - Cosset, F L AU - Cosset FL FAU - Klatzmann, D AU - Klatzmann D FAU - Guigon, M AU - Guigon M FAU - Lemoine, F M AU - Lemoine FM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Hum Gene Ther JT - Human gene therapy JID - 9008950 RN - 0 (Antigens, CD34) RN - 0 (DNA Primers) SB - IM MH - Antigens, CD34/*immunology MH - Base Sequence MH - Cell Division MH - Cell Line MH - DNA Primers MH - Dendritic Cells/immunology/*metabolism MH - Fetal Blood/*cytology MH - *Gene Transfer Techniques MH - Hematopoietic Stem Cell Mobilization MH - Humans MH - Immunophenotyping MH - Retroviridae/*genetics MH - T-Lymphocytes/cytology MH - Transduction, Genetic EDAT- 1999/02/18 00:00 MHDA- 1999/02/18 00:01 CRDT- 1999/02/18 00:00 PHST- 1999/02/18 00:00 [pubmed] PHST- 1999/02/18 00:01 [medline] PHST- 1999/02/18 00:00 [entrez] AID - 10.1089/10430349950018977 [doi] PST - ppublish SO - Hum Gene Ther. 1999 Jan 20;10(2):175-87. doi: 10.1089/10430349950018977.