title: [In vivo study of antitumor immune responses induced by anti-idiotypic minibody vaccine of ovarian cancer].
abstract: OBJECTIVE
  6B11 anti-idiotypic minibody can be constructed by fusion of anti-idiotypic single chain antibody (6B11scFv) to human IgG(1) hinge and CH3, which can simulate the function of ovarian carcinoma antigen. It has immune activity of both 6B11 and human immunoglobulin IgG(1) Fc. This study was designed to evaluate whether anti-tumor immune response can be induced in BALB/c mice immunized with 6B11anti-idiotypic minibody and explore its probability as ovarian cancer vaccine.
  
  
  METHODS
  BALB/c mice were immunized repeatedly by 6B11 anti-idiotypic minibody. Competition inhibition test, indirect ELISA test, and immune flow cytometry were used for analyzing the serum characterization of anti-anti-idiotypic antibody (Ab3) and the changes of T lymphocyte phenotype of spleen.
  
  
  RESULTS
  The specific antitumor immune response could be induced in BALB/c mice after immunized with anti-idiotypic minibody without carrier proteins and adjuvant. The Ab3 maintained at a high level till 30 day after the last immunization. It stimulated proliferation of CD4+ T cells and CD8+ T cells from the spleen of BALB/c mice on 4th day, 14th day, 24th day, and 30th day after the last immunity respectively.
  
  
  CONCLUSIONS
  6B11 anti-idiotypic minibody can induce both humoral and cellular immunity against ovarian carcinoma in vivo, which provided experimental evidence for clinical use of fusion protein 6B11 minibody as anti-idiotype vaccines against ovarian carcinoma.
authors.affiliation: Gynecologic Oncology Center, Peking University People's Hospital, Beijing, 100044, P.R.China.
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Chang
authors.forename: Heng
authors.initials: H
authors.lastname: Cui
authors.forename: Jie
authors.initials: J
authors.lastname: Feng
authors.forename: Wen-Lan
authors.initials: WL
authors.lastname: Yang
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Tian-Yun
authors.initials: TY
authors.lastname: Fu
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000096:biosynthesis / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000096:biosynthesis; D000912:Antibodies, Neoplasm / Q000096:biosynthesis / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology; D019496:Cancer Vaccines / Q000276:immunology*; D002455:Cell Division; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D010051:Ovarian Neoplasms / Q000276:immunology*; D011994:Recombinant Proteins / Q000276:immunology
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm; D019496:Cancer Vaccines; D007074:Immunoglobulin G; D011994:Recombinant Proteins