title: Induction of primary anti-HIV CD4 and CD8 T cell responses by dendritic cells transduced with self-inactivating lentiviral vectors.
abstract: In this study, we demonstrate that a minimal self-inactivating (SIN) lentiviral vector (LV) that does not encode any human immunodeficiency virus (HIV) genes is able to induce HIV-specific CD4 and CD8 T cell responses after transduction of dendritic cells (DCs). The LV-DC-primed T cells displayed HIV-specific lytic degranulation, as illustrated by acquisition of CD107a/b expression on the cell surface and up-regulation of active caspase 3. HIV-specific cytotoxic T lymphocyte (CTL) response was consistently detected using different assays, and T cell receptors specific to three prominent HIV epitopes, SL9 (Gag peptide: SLYNTVATL), IV9 (Pol peptide: ILKEPVHGV), and MA10 (In peptide: MASDFNLPPV) were detected using HLA-A0201 peptide-tetramers. These results demonstrate that DCs transduced with the minimal SIN-LV can efficiently induce HIV-specific CD4 and CD8 T cell responses. Since LVs are popular gene transfer tools, our results have fundamental implications for future LV applications and DC vaccine development.
authors.affiliation: Department of Molecular Genetics and Microbiology, Powell Gene Therapy Center, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL 32610-0266, USA.
authors.forename: Xiaochuan
authors.initials: X
authors.lastname: Chen
authors.forename: Bei
authors.initials: B
authors.lastname: Wang
authors.forename: Lung-Ji
authors.initials: LJ
authors.lastname: Chang
mesh_terms: D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000821:virology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000821:virology; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism / Q000821:virology; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D016086:Lentivirus / Q000235:genetics*; D052118:Lysosomal-Associated Membrane Protein 1 / Q000378:metabolism; D052119:Lysosomal-Associated Membrane Protein 2 / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000378:metabolism; D054353:Perforin; D052899:Pore Forming Cytotoxic Proteins / Q000378:metabolism; D011948:Receptors, Antigen, T-Cell / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000821:virology; D014161:Transduction, Genetic / Q000379:methods*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D052118:Lysosomal-Associated Membrane Protein 1; D052119:Lysosomal-Associated Membrane Protein 2; D008562:Membrane Glycoproteins; D052899:Pore Forming Cytotoxic Proteins; D011948:Receptors, Antigen, T-Cell; D014409:Tumor Necrosis Factor-alpha; D054353:Perforin; D007371:Interferon-gamma