title: Vaccination with multiple antigen peptide as rejection antigen peptide in murine leukemia.
abstract: pRL1a (IPGLPLSL) is the Ld-binding tumor rejection antigen peptide recognized by CTLs on BALB/c radiation leukemia RL(male)1. We demonstrated that in vivo and in vitro sensitization with pRL1a multiple antigen peptide (MAP), but not with the pRL1a peptide itself, generated pRL1a-specific CTLs in the spleen cells of BALB/c mice. No enhancement of cytotoxicity was observed by emulsifying pRLla MAP in incomplete Freund's adjuvant or in complete Freund's adjuvant for in vivo sensitization. Selective depletion of CD4+ T cells in mice by treatment with anti-L3T4 (CD4) monoclonal antibody and that of macrophages by treatment with carrageenan on in vivo sensitization with pRL1a MAP abrogated CTL generation. The findings suggest that CD4+ T cells and antigen-presenting cells were necessary for the in vivo priming of CD8+ T cells with pRL1a MAP. Furthermore, we demonstrated that in vivo sensitization of BALB/c mice with pRL1a MAP, but not with pRL1a peptide, showed an inhibitory effect on RL(male)1 tumor growth. No growth-inhibitory effect was observed on control RVA, RVD, or Meth A tumors.
authors.affiliation: Department of Parasitology and Immunology, Okayama University Medical School, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Manki
authors.forename: T
authors.initials: T
authors.lastname: Ono
authors.forename: A
authors.initials: A
authors.lastname: Uenaka
authors.forename: Y
authors.initials: Y
authors.lastname: Seino
authors.forename: E
authors.initials: E
authors.lastname: Nakayama
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage; D000938:Antigen-Presenting Cells; D000951:Antigens, Neoplasm / Q000008:administration & dosage* / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D005260:Female; D007114:Immunization; D007942:Leukemia, Experimental / Q000276:immunology / Q000517:prevention & control*; D007953:Leukemia, Radiation-Induced / Q000276:immunology / Q000517:prevention & control*; D008213:Lymphocyte Activation; D008212:Lymphocyte Depletion; D051379:Mice; D008807:Mice, Inbred BALB C; D010446:Peptide Fragments / Q000008:administration & dosage* / Q000276:immunology; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014407:Tumor Cells, Cultured; D014611:Vaccination
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D010446:Peptide Fragments