title: Induction of Th2-directed immune responses by IL-4-transduced dendritic cells in mice.
abstract: Dendritic cell (DC)-based vaccines have been used to generate Th1-mediated, protective immunity against cancers and infectious microorganisms. As an attempt to develop a new vaccine protocol for the induction of Th2-directed responses, we introduced an IL-4 plasmid vector into the XS106 DC line (derived from A/J mice). Although relatively small fractions of XS106 cells exhibited apparent intracellular deposition of IL-4, they secreted biologically relevant amounts of the cytokine. IL-4-transduced XS106 DC and control XS106 DC transfected with vector alone were pulsed with KLH and injected s.c. into A/J mice. The overall magnitude of KLH-specific cellular and humoral responses was comparable between the two animal groups. However, they differed in the isotype profile albeit only transiently, with the IL-4-transduced DC group showing higher IgE and lower IgG2a responses, and in the cytokine profile, with spleen cells isolated from the IL-4-transduced DC group producing higher IL-13 and lower IL-12. Thus, delivery of IL-4 gene to relatively small numbers of DC is sufficient to modify the immunological outcome of DC-based vaccines.
authors.affiliation: Department of Dermatology, University of Texas Southwestern Medical Center, 75235-9069, Dallas, TX, USA.
authors.forename: S
authors.initials: S
authors.lastname: Hayashi
authors.forename: S A
authors.initials: SA
authors.lastname: Johnston
authors.forename: A
authors.initials: A
authors.lastname: Takashima
mesh_terms: D000818:Animals; D000917:Antibody Formation; D003713:Dendritic Cells / Q000276:immunology*; D005260:Female; D006433:Hemocyanins / Q000276:immunology; D006968:Hypersensitivity, Delayed / Q000209:etiology; D018664:Interleukin-12 / Q000096:biosynthesis; D018793:Interleukin-13 / Q000096:biosynthesis; D015847:Interleukin-4 / Q000235:genetics / Q000502:physiology*; D051379:Mice; D018418:Th2 Cells / Q000276:immunology*; D014162:Transfection; D014612:Vaccines / Q000276:immunology
chemical_list: D018793:Interleukin-13; D014612:Vaccines; D018664:Interleukin-12; D015847:Interleukin-4; D006433:Hemocyanins; C032808:keyhole-limpet hemocyanin