title: Influenza A virus matrix protein 1-specific human CD8+ T-cell response induced in trivalent inactivated vaccine recipients.
abstract: Among 17 HLA-A2-positive healthy adults, CD8+ T-cell responses against an HLA-A2-restricted matrix protein 1 (M1) epitope increased after immunization with trivalent inactivated influenza vaccine (TIV) in two individuals. The presence of M1 in TIV was confirmed by Western blotting. T-cell cytotoxicity assays showed that TIV is processed and the epitope is presented by antigen-presenting cells to an M1 epitope-specific CD8+ T-cell line for specific lysis. These data show that TIV, which is formulated to contain surface glycoproteins to induce serotype-specific antibody responses, also contains M1, capable of inducing subtype cross-reactive CD8+ T-cell responses in some vaccinees.
authors.affiliation: Center for Infectious Disease and Vaccine Research, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA. masanori.terajima@umassmed.edu
authors.forename: Masanori
authors.initials: M
authors.lastname: Terajima
authors.forename: John
authors.initials: J
authors.lastname: Cruz
authors.forename: Anita M
authors.initials: AM
authors.lastname: Leporati
authors.forename: Laura
authors.initials: L
authors.lastname: Orphin
authors.forename: Jenny Aurielle B
authors.initials: JA
authors.lastname: Babon
authors.forename: Mary Dawn T
authors.initials: MD
authors.lastname: Co
authors.forename: Pamela
authors.initials: P
authors.lastname: Pazoles
authors.forename: Julie
authors.initials: J
authors.lastname: Jameson
authors.forename: Francis A
authors.initials: FA
authors.lastname: Ennis
mesh_terms: D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D002460:Cell Line; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D015789:HLA-A2 Antigen / Q000378:metabolism; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D053122:Influenza A Virus, H3N2 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000276:immunology*; D007251:Influenza, Human / Q000276:immunology / Q000517:prevention & control*; D015164:Vaccines, Inactivated / Q000008:administration & dosage / Q000276:immunology*; D014763:Viral Matrix Proteins / Q000276:immunology*
chemical_list: D018984:Epitopes, T-Lymphocyte; D015789:HLA-A2 Antigen; D007252:Influenza Vaccines; D015164:Vaccines, Inactivated; D014763:Viral Matrix Proteins