PMID- 20231816 OWN - NLM STAT- MEDLINE DCOM- 20120202 LR - 20100316 IS - 2589-0646 (Electronic) IS - 2589-0646 (Linking) VI - 3 IP - 1 DP - 2010 TI - Gibbon ape leukemia virus transduction of peripheral blood CD34+-derived dendritic cells. PG - 399-402 AB - BACKGROUND: Dendritic cells (DCs) play a critical role in the immune response and are a candidate for immunotherapy in cancer. Since gibbon ape leukemia virus (GALV) transduction of CD34+ cells is reasonably efficacious, we assessed the efficacy of GALV transduction of CD34+ derived DCs as a possible approach to creating genetically modified DCs for immunotherapy. METHODS: Peripheral blood CD34+ cells were transduced with retroviruses obtained from the PG13/LN C8 cell line, with the neomycin gene as a marker gene. After prestimulation of hematopoietic cells for 24 hours with 10 ng/mL interleukin (IL)-3, 10 ng/mL IL-6, 100 ng/mL stem cell factor, 100 ng/mL granulocyte-macrophage colony stimulating factor and 8 Amicrog/mL protamine sulfate, the cells were cultured in a transforming media prior to differentiating into DCs by GM-CSF, TNF-a and IL-4. Immunophenotyping analyses for confirmation of the generated DCs, colony formation assay and PCR were done for the expression of neomycin gene in the transduced cells. RESULTS: Titration of viral vectors indicated a transduction efficiency of 1x10(5) CFU/mL. Transduction efficiency for the CD34+ cells transformed to DCs was 45% and 38% before and after DC differentiation, respectively. Additionally, a mean (SEM) of 26.9% (11.4%) and 41.4% (11.8%) of the genetically modified DCs were positive for CD86+ HLA-DR and CD1a+CD14, respectively CONCLUSION: This study showed that the majority of transduced CD34+ cells were successfully differentiated into cells identical to DCs according to morphology and immunophenotyping features, which could be a potential application in immunotherapy. FAU - Moezzi, Leili AU - Moezzi L AD - Faculty of Paramedical Sciences, Tehran University of Medical Sciences, Tehran, Iran. FAU - Alimoghaddam, Kamran AU - Alimoghaddam K FAU - Saleh, Alireza J AU - Saleh AJ FAU - Shahrokhi, Somayeh AU - Shahrokhi S FAU - Ghaffari, Seyes Hamidolah AU - Ghaffari SH FAU - Bagheri, Nadia AU - Bagheri N FAU - Chardouli, Bahram AU - Chardouli B FAU - Ghavamzadeh, Ardeshir AU - Ghavamzadeh A LA - eng PT - Journal Article PL - Saudi Arabia TA - Hematol Oncol Stem Cell Ther JT - Hematology/oncology and stem cell therapy JID - 101468532 RN - 0 (Antigens, CD34) SB - IM MH - *Antigens, CD34 MH - Blood Cells MH - Cell Culture Techniques/methods MH - Cell Differentiation MH - Dendritic Cells/cytology/*metabolism MH - Hematopoietic Stem Cells/cytology MH - Humans MH - Immunotherapy/*methods MH - Leukemia Virus, Gibbon Ape/*genetics MH - Transduction, Genetic/*methods EDAT- 2010/03/17 06:00 MHDA- 2012/02/03 06:00 CRDT- 2010/03/17 06:00 PHST- 2010/03/17 06:00 [entrez] PHST- 2010/03/17 06:00 [pubmed] PHST- 2012/02/03 06:00 [medline] AID - 10-019 [pii] PST - ppublish SO - Hematol Oncol Stem Cell Ther. 2010;3(1):399-402.