title: Simultaneous generation of cytomegalovirus-specific CD8+ and CD4+ T lymphocytes by use of dendritic cells comodified with pp65 mRNA and pp65 protein.
abstract: Cytomegalovirus (CMV) disease remains a severe complication in patients who have undergone transplantation. Viremia can be prevented and treated by the adoptive transfer of donor-derived CMV-directed T cells. To ensure long-term protection against CMV disease, it is important to transfer CMV antigen-specific T cells that represent both the CD8+ and the CD4+ subsets. In the present study, we used as stimulators dendritic cells (DCs) that were electroporated with in vitro-transcribed 5'-capped polyadenylated messenger RNA (mRNA) that encoded the CMV pp65 protein (i.e., pp65 mRNA). These DCs could efficiently activate CMV-directed CD8+ T cells, as assayed by tetramer staining, interferon- gamma production, and cytolytic activity. We also used DCs that were pulsed with a recombinant pp65 protein to activate CMV-directed CD4+ T cells. When DCs were comodified with pp65 mRNA and pp65 protein, large numbers of CMV-directed CD8+ and CD4+ T cells were generated simultaneously. The approach outlined in the present study can be adapted for a clinical protocol that circumvents potential virus-related biohazards and is available to all patients independently of their human leukocyte antigen haplotype.
authors.affiliation: Division of Clinical Immunology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.
authors.forename: Bjorn
authors.initials: B
authors.lastname: Carlsson
authors.forename: Mingyan
authors.initials: M
authors.lastname: Hou
authors.forename: Valeria
authors.initials: V
authors.lastname: Giandomenico
authors.forename: Berith
authors.initials: B
authors.lastname: Nilsson
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Totterman
authors.forename: Magnus
authors.initials: M
authors.lastname: Essand
mesh_terms: D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D003587:Cytomegalovirus / Q000276:immunology*; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D018274:Electroporation; D006801:Humans; D008213:Lymphocyte Activation; D010750:Phosphoproteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D011994:Recombinant Proteins / Q000276:immunology / Q000378:metabolism; D013045:Species Specificity; D014763:Viral Matrix Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism
chemical_list: D010750:Phosphoproteins; D012333:RNA, Messenger; D011994:Recombinant Proteins; D014763:Viral Matrix Proteins; C065418:cytomegalovirus matrix protein 65kDa