title: alpha-fetoprotein and interleukin-18 gene-modified dendritic cells effectively stimulate specific type-1 CD4- and CD8-mediated T-Cell response from hepatocellular carcinoma patients in Vitro.
abstract: The T-helper 1 (Th1) immune reaction is most important in dendritic cell (DC)-based immunotherapy. Interleukin (IL)-18, a Th1-biasing cytokine, plays a pivotal role in inducing cytotoxic T lymphocyte (CTL) responses. In this study, we analyzed whether dendritic cells (DCs) from patients with hepatocellular carcinoma (HCC) can be transduced with the IL-18 gene and/or alpha-fetoprotein (AFP) gene, and we examined whether vaccinations using these genetically engineered DC can induce stronger therapeutic antitumor immunity. The results showed that DC transfected with AdIL-18/AFP can expressed IL-18 and AFP by reverse transcriptase-polymerase chain reaction and enzyme-linked immunoassay. Compared with those before transfection, the expressions of membrane molecules were increased dramatically. Specific T cells generated by DC transfected with AdIL-18/AFP recognized HLA-matched HepG2 cell lines specifically. Most importantly, The cytotoxic activity of CTLs against HepG2 with DC expressing AFP(AFP-DC) was significantly augmented by co-transduction with the IL-18 gene. Administration with such vaccine also significantly increased the production of interleukin-12p70 and interferon-gamma. These results indicate that a vaccination therapy using DC co-transduced with the TAA gene and IL-18 genes is effective strategy for immunotherapy in terms of the activation of DCs, CD4+ T, cells and CD8+ T cells, and may be useful in the clinical application of a cancer vaccine therapy.
authors.affiliation: Department of Hepatobiliary Surgery, Xijing Hospital, Fourth Military Medical University, Shaanxi Province, China.
authors.forename: Da-Yong
authors.initials: DY
authors.lastname: Cao
authors.forename: Jing-Yue
authors.initials: JY
authors.lastname: Yang
authors.forename: Ke-Feng
authors.initials: KF
authors.lastname: Dou
authors.forename: Long-Yang
authors.initials: LY
authors.lastname: Ma
authors.forename: Zeng-Hui
authors.initials: ZH
authors.lastname: Teng
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D015703:Antigens, CD / Q000378:metabolism; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D019496:Cancer Vaccines / Q000276:immunology; D006528:Carcinoma, Hepatocellular / Q000276:immunology / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D018920:Coculture Techniques; D003602:Cytotoxicity, Immunologic / Q000276:immunology; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D015870:Gene Expression; D006684:HLA-DR Antigens / Q000378:metabolism; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D018664:Interleukin-12 / Q000378:metabolism; D020382:Interleukin-18 / Q000235:genetics* / Q000378:metabolism; D020014:K562 Cells; D008113:Liver Neoplasms / Q000276:immunology / Q000473:pathology; D008213:Lymphocyte Activation / Q000276:immunology*; D007959:Lymphocyte Culture Test, Mixed; D013601:T-Lymphocytes / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014162:Transfection; D000509:alpha-Fetoproteins / Q000235:genetics / Q000276:immunology* / Q000378:metabolism
chemical_list: D015703:Antigens, CD; D019496:Cancer Vaccines; D006684:HLA-DR Antigens; D020382:Interleukin-18; D000509:alpha-Fetoproteins; D018664:Interleukin-12; D007371:Interferon-gamma