title: Induction of influenza A virus cross-reactive cytotoxic T cells by a nucleoprotein/haemagglutinin preparation.
abstract: An ammonium deoxycholate fraction from bromelain-treated influenza A virus was highly enriched for virus nucleoprotein and contained residual haemagglutinin (NP/HA). The preparation did not contain detectable levels of matrix or neuraminidase proteins and was free of infectious virus. NP/HA effectively primed mice for cytotoxic T cells which lysed syngeneic cells infected with any type A influenza virus. Furthermore, NP/HA generated A-type virus cross-reactive cytotoxic T cells when added in vitro to spleen cells from mice previously primed with infectious influenza A virus. These properties imply that NP/HA has potential as a vaccine for heterotypic influenza A immunity.
mesh_terms: D000818:Animals; D003429:Cross Reactions; D006389:Hemagglutinins, Viral / Q000276:immunology* / Q000302:isolation & purification; D007114:Immunization; D009980:Influenza A virus / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009698:Nucleoproteins / Q000276:immunology* / Q000302:isolation & purification; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014763:Viral Matrix Proteins; D014764:Viral Proteins / Q000276:immunology* / Q000302:isolation & purification
chemical_list: D006389:Hemagglutinins, Viral; D009698:Nucleoproteins; D014763:Viral Matrix Proteins; D014764:Viral Proteins