title: Enhanced invasiveness of pancreatic adenocarcinoma cells stably transfected with cationic trypsinogen cDNA.
abstract: Various studies have described increased expression of cationic trypsinogen in malignant tumor cells. To explore the role of secreted cationic trypsinogen in invasion by cancer cells, we introduced cationic trypsinogen cDNA into Panc-1, a pancreatic adenocarcinoma-derived cell line that lacks expression of endogeneous trypsinogen. Four independent clones (designated Panc-1-Try-7, -9, -11 and -24) stably expressing cationic trypsinogen mRNA were isolated and processed for further study. In a zymographic analysis, gelatinolytic activity for cationic trypsinogen was detectable in serum-free conditioned media obtained from all 4 transfectants but not in media from mock-transfected or parental Panc-1 cells. A Matrigel invasion assay revealed that all trypsinogen-expressing transfectants acquired significantly greater invasive ability than that shown by mock-transfected and parental Panc-1 cells. In addition, enhanced invasiveness of the transfectants was suppressed by FUT-175, a serine protease inhibitor, to the level seen in parental cells. These results provide direct evidence that cationic trypsinogen can increase the invasive ability of carcinoma cells.
authors.affiliation: Department of Surgery (II), Kanazawa University School of Medicine, Kanazawa, Japan. ohtat@surg2.m.kanazawa-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Tajima
authors.forename: T
authors.initials: T
authors.lastname: Ohta
authors.forename: A
authors.initials: A
authors.lastname: Elnemr
authors.forename: T
authors.initials: T
authors.lastname: Yasui
authors.forename: H
authors.initials: H
authors.lastname: Kitagawa
authors.forename: S
authors.initials: S
authors.lastname: Fushida
authors.forename: M
authors.initials: M
authors.lastname: Kayahara
authors.forename: K
authors.initials: K
authors.lastname: Miwa
authors.forename: T
authors.initials: T
authors.lastname: Wakayama
authors.forename: S
authors.initials: S
authors.lastname: Iseki
authors.forename: S
authors.initials: S
authors.lastname: Yokoyama
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D005780:Gelatin / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D009361:Neoplasm Invasiveness; D010190:Pancreatic Neoplasms / Q000473:pathology*; D014162:Transfection; D014357:Trypsin; D014362:Trypsinogen / Q000235:genetics / Q000502:physiology*; D014407:Tumor Cells, Cultured
chemical_list: C064831:PRSS2 protein, human; D005780:Gelatin; D014362:Trypsinogen; D014357:Trypsin