PMID- 10933911 OWN - NLM STAT- MEDLINE DCOM- 20000918 LR - 20220227 IS - 1525-0016 (Print) IS - 1525-0016 (Linking) VI - 1 IP - 1 DP - 2000 Jan TI - Human T lymphocyte genetic modification with naked DNA. PG - 49-55 AB - Endowing T lymphocytes with novel functional attributes by genetic modification is under development for a broad range of clinical cellular immunotherapy applications. To circumvent many of the limitations associated with viral vector systems, a plasmid-based electroporation system that reliably generates G418-resistant primary human T lymphocyte clones was developed. TCR alpha/beta+ CD4+CD8-, and CD4-CD8+ T lymphocyte clones can be routinely isolated from OKT3-stimulated peripheral blood mononuclear cells electroporated with linear plasmid DNA in a limiting dilution drug selection format. Fluorescence in situ hybridization (FISH) studies performed on T cell metaphase spreads using a probe specific for plasmid sequence demonstrated a single FISH signal doublet that varied in chromosomal location from clone to clone. Southern blot analysis using a Neo-specific probe verified chromosomal integration of plasmid vector at a single site. Band intensity quantitation of blots developed with a zeta-specific probe capable of annealing to both endogenous TCR-zeta and the introduced chimeric zeta sequence demonstrated that integrated plasmid was present at a single copy number. Expression levels of the CD20-specific chimeric immunoreceptor construct from a CMV immediate/early promoter present in the plasmid vector varied widely from clone to clone but remained stable during ex vivo expansion to cell numbers in excess of 10(10). This T lymphocyte genetic modification strategy is currently being piloted in a FDA-sanctioned adoptive therapy trial for recurrent lymphoma. FAU - Jensen, M C AU - Jensen MC AD - City of Hope National Medical Center and Beckman Research Institute, Duarte, California 91010-3000, USA. mjensen@coh.org FAU - Clarke, P AU - Clarke P FAU - Tan, G AU - Tan G FAU - Wright, C AU - Wright C FAU - Chung-Chang, W AU - Chung-Chang W FAU - Clark, T N AU - Clark TN FAU - Zhang, F AU - Zhang F FAU - Slovak, M L AU - Slovak ML FAU - Wu, A M AU - Wu AM FAU - Forman, S J AU - Forman SJ FAU - Raubitschek, A AU - Raubitschek A LA - eng GR - CA 30206/CA/NCI NIH HHS/United States GR - CA 33572/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Ther JT - Molecular therapy : the journal of the American Society of Gene Therapy JID - 100890581 RN - 0 (Membrane Proteins) RN - 0 (Receptors, Antigen, T-Cell) RN - 0 (Recombinant Fusion Proteins) RN - 0 (antigen T cell receptor, zeta chain) SB - IM MH - CD4-Positive T-Lymphocytes/*immunology MH - CD8-Positive T-Lymphocytes/*immunology MH - Cell Line MH - Clone Cells MH - Electroporation MH - Genetic Therapy/*methods MH - Genetic Vectors MH - Humans MH - Immunotherapy/*methods MH - In Situ Hybridization, Fluorescence MH - Membrane Proteins/genetics/immunology MH - Plasmids/*genetics MH - Receptors, Antigen, T-Cell/genetics/immunology MH - Recombinant Fusion Proteins/genetics/immunology EDAT- 2000/08/10 11:00 MHDA- 2000/09/23 11:01 CRDT- 2000/08/10 11:00 PHST- 2000/08/10 11:00 [pubmed] PHST- 2000/09/23 11:01 [medline] PHST- 2000/08/10 11:00 [entrez] AID - S1525-0016(99)90012-6 [pii] AID - 10.1006/mthe.1999.0012 [doi] PST - ppublish SO - Mol Ther. 2000 Jan;1(1):49-55. doi: 10.1006/mthe.1999.0012.