title: Accelerated tumor growth in mice deficient in DNAM-1 receptor.
abstract: Since the identification of ligands for human and mouse DNAM-1, emerging evidence has suggested that DNAM-1 plays an important role in the T cell- and natural killer (NK) cell-mediated recognition and lysis of tumor cells. However, it remains undetermined whether DNAM-1 is involved in tumor immune surveillance in vivo. We addressed this question by using DNAM-1-deficient mice. DNAM-1-deficient cytotoxic T lymphocyte (CTL) and NK cells showed significantly less cytotoxic activity against DNAM-1 ligand-expressing tumors in vitro than wild-type (WT) cells. The methylcholanthrene (MCA)-induced fibrosarcoma cell line Meth A expressed the DNAM-1 ligand CD155, and DNAM-1-deficient mice showed increased tumor development and mortality after transplantation of Meth A cells. Moreover, the DNAM-1-deficient mice developed significantly more DNAM-1 ligand-expressing fibrosarcoma and papilloma cells in response to the chemical carcinogens MCA and 7,12-dimethylbenz[a]anthracene (DMBA), respectively, than did WT mice. These results indicate that DNAM-1 plays an important role in immune surveillance of tumor development.
authors.affiliation: Department of Immunology, Institute of Basic Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Iguchi-Manaka
authors.forename: Hirayasu
authors.initials: H
authors.lastname: Kai
authors.forename: Yumi
authors.initials: Y
authors.lastname: Yamashita
authors.forename: Kai
authors.initials: K
authors.lastname: Shibata
authors.forename: Satoko
authors.initials: S
authors.lastname: Tahara-Hanaoka
authors.forename: Shin-ichiro
authors.initials: S
authors.lastname: Honda
authors.forename: Teruhito
authors.initials: T
authors.lastname: Yasui
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kikutani
authors.forename: Kazuko
authors.initials: K
authors.lastname: Shibuya
authors.forename: Akira
authors.initials: A
authors.lastname: Shibuya
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000494:pharmacology; D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000235:genetics / Q000276:immunology; D002273:Carcinogens / Q000494:pharmacology; D045744:Cell Line, Tumor / Q000187:drug effects / Q000276:immunology; D005354:Fibrosarcoma / Q000276:immunology / Q000473:pathology; D006801:Humans; D007694:Killer Cells, Natural / Q000166:cytology / Q000276:immunology*; D008297:Male; D008748:Methylcholanthrene / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D018345:Mice, Knockout; D009368:Neoplasm Transplantation; D009369:Neoplasms / Q000378:metabolism / Q000473:pathology; D010212:Papilloma / Q000276:immunology / Q000473:pathology; D013602:T-Lymphocytes, Cytotoxic / Q000166:cytology / Q000276:immunology*; D000098862:T Lineage-Specific Activation Antigen 1
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000098862:T Lineage-Specific Activation Antigen 1; D002273:Carcinogens; D008748:Methylcholanthrene; D015127:9,10-Dimethyl-1,2-benzanthracene