PMID- 9789056 OWN - NLM STAT- MEDLINE DCOM- 19981124 LR - 20190501 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 95 IP - 22 DP - 1998 Oct 27 TI - Quantitative analysis of the immunopotency of genetically transfected dendritic cells. PG - 13147-52 AB - Dendritic cells (DCs) instruct and activate a naive immune system to mount a response toward foreign proteins. Therefore, it has been hypothesized that an ideal vaccine strategy would be to directly introduce genes encoding antigens into DCs. To test this strategy quantitatively, we have compared the immune response elicited by a genetically transfected DC line to that induced by a fibroblast line, or standard genetic immunization. We observe that a single injection of 500-1,000 transfected DCs can produce a response comparable to that of standard genetic immunization, whereas fibroblasts, with up to 50-fold greater transfection efficiency, were less potent. We conclude that transfection of a small number of DCs is sufficient to initiate a wide variety of immune responses. These results indicate that targeting genes to DCs will be important for controlling and augmenting the immunological outcome in genetic immunization. FAU - Timares, L AU - Timares L AD - Department of Medicine, University of Texas, Southwestern Medical Center, Dallas, TX 75235-8573, USA. FAU - Takashima, A AU - Takashima A FAU - Johnston, S A AU - Johnston SA LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Luminescent Proteins) RN - 0 (Recombinant Proteins) RN - 0 (alpha 1-Antitrypsin) RN - 147336-22-9 (Green Fluorescent Proteins) RN - EC 1.13.12.- (Luciferases) SB - IM MH - Animals MH - Animals, Newborn MH - Antigen-Presenting Cells/immunology MH - Dendritic Cells/*immunology MH - Female MH - Fibroblasts/immunology MH - Green Fluorescent Proteins MH - Immunization/methods MH - Luciferases/biosynthesis/genetics MH - Luminescent Proteins/biosynthesis/genetics MH - *Lymphocyte Activation MH - Lymphocyte Culture Test, Mixed MH - Mice MH - Mice, Inbred A MH - Recombinant Proteins/biosynthesis MH - T-Lymphocytes/*immunology MH - Transfection/*immunology MH - alpha 1-Antitrypsin/biosynthesis/genetics PMC - PMC23740 EDAT- 1998/10/28 00:00 MHDA- 1998/10/28 00:01 PMCR- 1999/04/27 CRDT- 1998/10/28 00:00 PHST- 1998/10/28 00:00 [pubmed] PHST- 1998/10/28 00:01 [medline] PHST- 1998/10/28 00:00 [entrez] PHST- 1999/04/27 00:00 [pmc-release] AID - 3261 [pii] AID - 10.1073/pnas.95.22.13147 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1998 Oct 27;95(22):13147-52. doi: 10.1073/pnas.95.22.13147.