title: Induction of Influenza Matrix Protein 1 and MelanA-specific T lymphocytes in vitro using mRNA-electroporated dendritic cells.
abstract: Genetically modified dendritic cells (DC) constitute a promising approach in cancer immunotherapy. Viral gene delivery systems have been shown to be very efficient strategies, but safety concerns for their clinical use in immunotherapy remain an important issue. Recently, the technique of mRNA electroporation was described as a very efficient tool for the genetic modification of human monocyte-derived DC. Here, we show that transgene expression can be modulated by varying the amount of mRNA used for electroporation. We document that CD40 ligation leads to a significant production of IL-12 by the electroporated DC, although the level of IL-12 production is somewhat lower than for non- or mock-electroporated DC. Furthermore, we show that the electroporated DC can be frozen and thawed without loss of viability or function and that Influenza virus Matrix Protein 1 mRNA electroporated DC are capable of inducing a memory cytotoxic T lymphocyte response and are more potent in doing so than mRNA-pulsed DC. Similar results were obtained with MelanA/MART-1 mRNA electroporated DC. These results clearly indicate that mRNA-electroporated DC represent powerful candidates for use as tumor vaccines and could constitute an improvement compared with vaccines using peptide-pulsed DC.
authors.affiliation: Laboratory of Molecular and Cellular Therapy, Department of Physiology-Immunology, Medical School of the Vrije Universiteit Brussel (VUB), Laarbeeklaan 103/E, 1090 Brussels, Belgium.
authors.forename: Sandra
authors.initials: S
authors.lastname: Tuyaerts
authors.forename: Annelies
authors.initials: A
authors.lastname: Michiels
authors.forename: Jurgen
authors.initials: J
authors.lastname: Corthals
authors.forename: Aude
authors.initials: A
authors.lastname: Bonehill
authors.forename: Carlo
authors.initials: C
authors.lastname: Heirman
authors.forename: Catherine
authors.initials: C
authors.lastname: de Greef
authors.forename: Sofie M
authors.initials: SM
authors.lastname: Noppe
authors.forename: Kris
authors.initials: K
authors.lastname: Thielemans
mesh_terms: D017951:Antigen Presentation; D000951:Antigens, Neoplasm; D019013:CD40 Antigens / Q000378:metabolism; D019496:Cancer Vaccines / Q000276:immunology; D002460:Cell Line; D002470:Cell Survival; D002986:Clinical Trials as Topic; D015925:Cryopreservation; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology*; D018274:Electroporation; D006801:Humans; D007156:Immunologic Memory; D007167:Immunotherapy; D007371:Interferon-gamma / Q000276:immunology; D018664:Interleukin-12 / Q000096:biosynthesis / Q000276:immunology; D058965:MART-1 Antigen; D009363:Neoplasm Proteins / Q000235:genetics / Q000276:immunology*; D009975:Orthomyxoviridae / Q000235:genetics / Q000276:immunology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*; D019076:Transgenes / Q000235:genetics; D014763:Viral Matrix Proteins / Q000235:genetics / Q000276:immunology*
chemical_list: D000951:Antigens, Neoplasm; D019013:CD40 Antigens; D019496:Cancer Vaccines; C031540:M-protein, influenza virus; D058965:MART-1 Antigen; C548667:MLANA protein, human; D009363:Neoplasm Proteins; D012333:RNA, Messenger; D014763:Viral Matrix Proteins; D018664:Interleukin-12; D007371:Interferon-gamma