title: Increased cytotoxic capacity of tumor antigen specific human T cells after in vitro stimulation with IL21 producing dendritic cells.
abstract: Monocyte derived dendritic cells (moDC) electroporated with tumor associated antigen derived mRNA can elicit specific T cells against tumor cells in vivo. IL21 has been shown to enhance activation and cytotoxicity in CD8+ T cells. We therefore investigated in vitro effects on human CD8+ T-cells after stimulation with IL21 mRNA electroporated moDC. Codon modification of the IL21 gene significantly enhanced IL21 production upon electroporation of moDC. Tumor associated antigen specific CTL induction efficiency was significantly enhanced when codon modified IL21 mRNA was co-electroporated with tumor associated antigen mRNA. Tumor associated antigen specific T cells induced by codon modified IL21-DC demonstrated increased cytotoxic capacity and killing compared to control cultures. In conclusion, ectopic expression of codon modified IL21 by moDC enhances the priming efficiency of the DC as well as the cytotoxic potential of the induced CTL.
authors: VU University Medical Center - Cancer Center Amsterdam, Department of Pathology, De Boelelaan 1117, Amsterdam, The Netherlands.
authors: A W
authors: AW
authors: Turksma
authors: H J
authors: HJ
authors: Bontkes
authors: J J
authors: JJ
authors: Ruizendaal
authors: H
authors: H
authors: van den Heuvel
authors: K B J
authors: KB
authors: Scholten
authors: S J A M
authors: SJ
authors: Santegoets
authors: T D
authors: TD
authors: de Gruijl
authors: C J L M
authors: CJ
authors: Meijer
authors: E
authors: E
authors: Hooijberg
mesh_terms: D000951:Antigens, Neoplasm / Q000235:genetics / Q000276:immunology; D002478:Cells, Cultured; D018920:Coculture Techniques; D003062:Codon / Q000235:genetics / Q000276:immunology; D003601:Cytotoxicity Tests, Immunologic / Q000379:methods; D003602:Cytotoxicity, Immunologic / Q000276:immunology*; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D018274:Electroporation; D053804:Granzymes / Q000276:immunology / Q000378:metabolism; D006801:Humans; D007378:Interleukins / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D020014:K562 Cells; D012333:RNA, Messenger / Q000235:genetics / Q000276:immunology; D017452:Receptors, IgG / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D014162:Transfection / Q000379:methods; D000098546:Interleukin-21
chemical_list: D000951:Antigens, Neoplasm; D003062:Codon; D007378:Interleukins; D012333:RNA, Messenger; D017452:Receptors, IgG; D053804:Granzymes; D000098546:Interleukin-21