title: Heparanase: a new metastasis-associated antigen recognized in breast cancer patients by spontaneously induced memory T lymphocytes.
abstract: Increased expression and secretion of heparanase (Hpa) by tumor cells promotes tumor invasion through extracellular matrices, tissue destruction, angiogenesis, and metastasis. Here, we show the existence in breast cancer patients of Hpa-specific T lymphocytes by fluorescence-activated cell sorting flow cytometry using Hpa peptide-MHC class I tetramers. We furthermore show memory T-cell responses in a high proportion of breast cancer patients to Hpa-derived HLA-A2-restricted peptides, leading to production of IFN-gamma and to generation of antitumor CTLs lysing breast cancer cells. Such CTLs recognized endogenously processed respective Hpa peptides on Hpa-transfected and Hpa-expressing untransfected breast carcinoma cells. According to these results and to the fact that such cells were not found in healthy people, Hpa seems to be an attractive new tumor-associated antigen and its HLA-A2-restricted peptides ought to be good candidates for peptide vaccination to reactivate memory immune responses to invasive and metastatic cancer cells.
authors.affiliation: Department of Cellular Immunology, The German Cancer Research Center, D010 Im Neuenheimer Feld, 69120 Heidelberg, Germany.
authors.forename: Nora
authors.initials: N
authors.lastname: Sommerfeldt
authors.forename: Philipp
authors.initials: P
authors.lastname: Beckhove
authors.forename: Yingzi
authors.initials: Y
authors.lastname: Ge
authors.forename: Florian
authors.initials: F
authors.lastname: Schütz
authors.forename: Carmen
authors.initials: C
authors.lastname: Choi
authors.forename: Mariana
authors.initials: M
authors.lastname: Bucur
authors.forename: Christoph
authors.initials: C
authors.lastname: Domschke
authors.forename: Christof
authors.initials: C
authors.lastname: Sohn
authors.forename: Andreas
authors.initials: A
authors.lastname: Schneeweis
authors.forename: Joachim
authors.initials: J
authors.lastname: Rom
authors.forename: Dirk
authors.initials: D
authors.lastname: Pollmann
authors.forename: Dagmar
authors.initials: D
authors.lastname: Leucht
authors.forename: Israel
authors.initials: I
authors.lastname: Vlodavsky
authors.forename: Volker
authors.initials: V
authors.lastname: Schirrmacher
mesh_terms: D000951:Antigens, Neoplasm / Q000276:immunology*; D001943:Breast Neoplasms / Q000201:enzymology / Q000276:immunology*; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D005260:Female; D005966:Glucuronidase / Q000276:immunology*; D015789:HLA-A2 Antigen / Q000276:immunology / Q000378:metabolism; D006801:Humans; D007156:Immunologic Memory / Q000276:immunology; D007371:Interferon-gamma / Q000096:biosynthesis / Q000276:immunology; D009842:Oligopeptides / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D000099175:Heparanase
chemical_list: D000951:Antigens, Neoplasm; D018984:Epitopes, T-Lymphocyte; D005966:Glucuronidase; D015789:HLA-A2 Antigen; D007371:Interferon-gamma; D009842:Oligopeptides; D000099175:Heparanase