PMID- 14551149 OWN - NLM STAT- MEDLINE DCOM- 20040310 LR - 20210206 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 103 IP - 3 DP - 2004 Feb 1 TI - Highly efficient expression of transgenic proteins by naked DNA-transfected dendritic cells through terminal differentiation. PG - 811-9 AB - Dendritic cells (DCs) play a key role in the induction and control of immunity. Genetic engineering of DCs is a promising approach for the development of a broad range of immunomodulatory strategies, for purposes ranging from genetic immunization to tolerance induction. The development of DC-based immunotherapies is limited by the inability to efficiently transfect DCs using naked DNA. Here we demonstrate that after plasmid DNA delivery, the transgene expression level controlled by the human immediate-early cytomegalovirus promoter (hIE-CMVp) is higher in mature DCs than in immature DCs and is further increased after terminal differentiation of DCs by agonist anti-CD40 monoclonal antibody (mAb) or after DC interaction with CD4(+) T cells. CD40 signaling of DCs resulted in nuclear translocation of the transcription factors nuclear factor-kappaB (NF-kappaB), activator of protein-1 (AP-1), and cyclic adenosine monophosphate (cAMP)-responsive element, necessary for the activation of hIE-CMVp. Transgene expression by DCs diminished after the inhibition of these transcription factors or the blockade of adhesion molecules involved in the DC-T-cell synapse. Importantly, CD40 signaling of DCs results in the highly efficient expression and presentation of transgenic antigens and the induction of "in vivo" cytotoxic T-cell (CTL) responses specific for transgenic antigen peptides, demonstrating the functional potential of genetically engineered DCs. FAU - Larregina, Adriana T AU - Larregina AT AD - W1051 Biomedical Science Tower, 200 Lothrop St, Pittsburgh, PA 15213, USA. adrianal@pitt.edu FAU - Morelli, Adrian E AU - Morelli AE FAU - Tkacheva, Olga AU - Tkacheva O FAU - Erdos, Geza AU - Erdos G FAU - Donahue, Cara AU - Donahue C FAU - Watkins, Simon C AU - Watkins SC FAU - Thomson, Angus W AU - Thomson AW FAU - Falo, Louis D Jr AU - Falo LD Jr LA - eng GR - P01 AI0550794/AI/NIAID NIH HHS/United States GR - P01 CA73743/CA/NCI NIH HHS/United States GR - R01 AI41011/AI/NIAID NIH HHS/United States GR - R01 AI43916/AI/NIAID NIH HHS/United States GR - R01 DK49745/DK/NIDDK NIH HHS/United States GR - R21 AI55027/AI/NIAID NIH HHS/United States GR - R21 HL69725/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. DEP - 20031009 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antigens) RN - 0 (CD40 Antigens) RN - 0 (DNA, Recombinant) RN - 0 (Recombinant Proteins) RN - 9006-59-1 (Ovalbumin) SB - IM MH - Animals MH - Antigen Presentation MH - Antigens MH - CD40 Antigens/metabolism MH - Cell Differentiation MH - Cytomegalovirus/genetics MH - DNA, Recombinant/*genetics MH - Dendritic Cells/*cytology/immunology/*metabolism MH - Gene Expression MH - Humans MH - Immunotherapy/methods MH - Mice MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Ovalbumin/immunology MH - Promoter Regions, Genetic MH - Recombinant Proteins/*genetics MH - Signal Transduction MH - T-Lymphocytes, Cytotoxic/immunology EDAT- 2003/10/11 05:00 MHDA- 2004/03/11 05:00 CRDT- 2003/10/11 05:00 PHST- 2003/10/11 05:00 [pubmed] PHST- 2004/03/11 05:00 [medline] PHST- 2003/10/11 05:00 [entrez] AID - S0006-4971(20)50211-5 [pii] AID - 10.1182/blood-2003-02-0524 [doi] PST - ppublish SO - Blood. 2004 Feb 1;103(3):811-9. doi: 10.1182/blood-2003-02-0524. Epub 2003 Oct 9.