title: Systemic and mucosal T-lymphocyte activation induced by recombinant adenovirus vaccines in rhesus monkeys.
abstract: The administration of vectors designed to elicited cell-mediated immune responses may have other consequences that are clinically significant. To explore this possibility, we evaluated T-cell activation during the first 2 months after recombinant adenovirus serotype 5 (rAd5) prime or boost immunizations in rhesus monkeys. We also evaluated the kinetics of T-lymphocyte activation in both the systemic and the mucosal compartments after rAd5 administration in monkeys with preexisting immunity to Ad5. The rAd5 immunization induced lower-frequency Gag epitope-specific CD8+ T cells in the colonic mucosa than in the peripheral blood. There was evidence of an expansion of the simian immunodeficiency virus Gag-specific CD8+ T-cell responses, but not the Ad5 hexon-specific T-cell responses, following a homologous rAd5 boost. A striking but transient T-lymphocyte activation in both the systemic and the mucosal compartments of rhesus monkeys was observed after rAd5 immunization. These findings indicate that the administration of a vaccine vector such as Ad5 can induce a global activation of T cells.
authors: Division of Viral Pathogenesis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA.
authors: Yue
authors: Y
authors: Sun
authors: Robert T
authors: RT
authors: Bailer
authors: Srinivas S
authors: SS
authors: Rao
authors: John R
authors: JR
authors: Mascola
authors: Gary J
authors: GJ
authors: Nabel
authors: Richard A
authors: RA
authors: Koup
authors: Norman L
authors: NL
authors: Letvin
mesh_terms: D000256:Adenoviridae / Q000235:genetics / Q000276:immunology*; D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D005822:Genetic Vectors; D007114:Immunization / Q000379:methods; D007117:Immunization, Secondary / Q000379:methods; D008213:Lymphocyte Activation / Q000276:immunology*; D008253:Macaca mulatta / Q000235:genetics / Q000276:immunology* / Q000821:virology; D013601:T-Lymphocytes / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000276:immunology*; D014765:Viral Vaccines / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology*
chemical_list: D014614:Vaccines, Synthetic; D014765:Viral Vaccines