title: Antitumor effects and immunoregulation mechanisms of IL-23 gene in mouse mammary cancer mediated by retrovirus.
abstract: Interleukin (IL)-23, composed of p19 and p40 subunits, has diverse functions in regulating immune systems, enhancing cell-mediated immunity. In the present study, we investigated whether forced expression of the p19-linked p40 gene in murine mammary cancer cells (MA891) produced antitumor effects in vivo. Tumor growth of MA-891 cells expressing IL-23 (IL-23/MA891) in mice was retarded compared with parental and vector DNA-transduced tumors and survival of the mice inoculated with IL-23/MA-891 cells was prolonged. Expressions of the CD4(+) T cells and CD8(+) T cells were up-regulated not only in IL-23/MA-891 tumor specimens but also in spleen cells of mice inoculated with IL-23/MA-891 as compared with those of mice inoculated with parental or vector DNA-transduced tumors. Cytotoxic CD8(+) T lymphocyte (CTL) activity of spleen cells from mice inoculated with IL-23/MA-891 was also significantly higher than the other two groups. Th1-type cytokines such as interferon-gamma, TNF-alpha and IL-12p70 secreted from spleen cells of mice bearing IL-23/MA-891 tumors were increased while Th2-type cytokine IL-4 was negative regulated. Moreover, we have identified that the quantity of DC in spleen cells of mice bearing IL-23/MA-891 tumors was increased as compared with those mice bearing parental or vector DNA-transfected tumors.
authors.affiliation: Research Center, Fourth Hospital of Hebei Medical University and Hebei Cancer Institute, Jiankanglu, Shijiazhuang, China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Liu
authors.forename: Baoen
authors.initials: B
authors.lastname: Shan
authors.forename: Yonglu
authors.initials: Y
authors.lastname: Feng
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D045744:Cell Line, Tumor; D016207:Cytokines / Q000096:biosynthesis; D003602:Cytotoxicity, Immunologic; D005260:Female; D015316:Genetic Therapy; D005822:Genetic Vectors; D053762:Interleukin-12 Subunit p40 / Q000235:genetics* / Q000276:immunology*; D008325:Mammary Neoplasms, Experimental / Q000276:immunology / Q000628:therapy*; D051379:Mice; D012190:Retroviridae; D013154:Spleen / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014162:Transfection
chemical_list: D016207:Cytokines; D053762:Interleukin-12 Subunit p40