PMID- 11161442 OWN - NLM STAT- MEDLINE DCOM- 20010301 LR - 20071114 IS - 0008-8749 (Print) IS - 0008-8749 (Linking) VI - 206 IP - 2 DP - 2000 Dec 15 TI - A mouse model for immunization with ex vivo virus-infected dendritic cells. PG - 107-15 AB - Dendritic cells (DCs) have been demonstrated to be an important if not essential inducer of cellular immune responses. The ability to grow these cells in vitro may open up new avenues for protective immunizations. In this study we have analyzed the virus-specific memory response generated following immunization with ex vivo-infected bone marrow-derived dendritic cells. We demonstrate that mouse DCs are efficiently infected with influenza virus but do not release infectious progeny virus. Ex vivo-infected DCs secrete interleukin-12 (IL-12) and induce a potent T helper (Th)1-like immune response when injected into mice. This was demonstrated by the generation of cytotoxic T lymphocytes, the production of high levels of gamma-interferon, and undetectable levels of IL-4 upon in vitro restimulation of splenocytes from immunized animals. In addition, the virus-specific antibody response is primarily of the IgG2a isotype, consistent with the expansion of Th1 cells. Animals immunized with DCs infected with X-31 influenza virus and challenged with PR8 influenza virus cleared the infection faster than animals not vaccinated. Thus, infected DCs efficiently activate the cellular immune response and induce heterosubtypic immunity in mice. CI - Copyright 2000 Academic Press. FAU - Lopez, C B AU - Lopez CB AD - Department of Microbiology, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, New York, 10029, USA. FAU - Fernandez-Sesma, A AU - Fernandez-Sesma A FAU - Czelusniak, S M AU - Czelusniak SM FAU - Schulman, J L AU - Schulman JL FAU - Moran, T M AU - Moran TM LA - eng GR - 1P01A148204/PHS HHS/United States GR - 1R01AI4111/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Cell Immunol JT - Cellular immunology JID - 1246405 RN - 0 (Antigens, Viral) SB - IM MH - Adoptive Transfer/*methods MH - Animals MH - Antigens, Viral/immunology MH - Bone Marrow Cells/immunology/pathology/virology MH - Cell Differentiation/immunology MH - Cell Line MH - Cells, Cultured MH - Dendritic Cells/*immunology/pathology/transplantation/*virology MH - Disease Models, Animal MH - Dogs MH - Female MH - Immunologic Memory MH - Influenza A virus/classification/*immunology/pathogenicity MH - Injections, Intraperitoneal MH - Lymphocyte Activation MH - Mice MH - Mice, Inbred BALB C MH - Orthomyxoviridae Infections/immunology/pathology/virology MH - Recurrence MH - Species Specificity MH - Stem Cells/immunology/virology MH - T-Lymphocytes, Cytotoxic/immunology/virology MH - Th1 Cells/immunology/metabolism/virology MH - Virion/growth & development/pathogenicity EDAT- 2001/02/13 11:00 MHDA- 2001/03/07 10:01 CRDT- 2001/02/13 11:00 PHST- 2001/02/13 11:00 [pubmed] PHST- 2001/03/07 10:01 [medline] PHST- 2001/02/13 11:00 [entrez] AID - S0008-8749(00)91736-2 [pii] AID - 10.1006/cimm.2000.1736 [doi] PST - ppublish SO - Cell Immunol. 2000 Dec 15;206(2):107-15. doi: 10.1006/cimm.2000.1736.