title: Increased immunoreactivity of cathepsins in the rat esophagus under chronic acid reflux esophagitis.
abstract: We have designed a stable rat chronic acid reflux esophagitis (RE) model. In gastrointestinal lesions, several lysosomal cathepsins are known to participate in epithelial permeability in cell-cell connections, such as tight junctions in ulcerative colitis. However, very few studies have focused on the distribution of cathepsins in the esophageal multilayer squamous epithelium. Therefore to clarify the role of cathepsins in RE, we investigated their immunohistological localization in the esophageal epithelium under normal conditions and after RE. Of the cathepsins examined (cathepsins B, C, D, F, H, L, S, and X), granular immunoreactivity for cathepsins B, C, D and L was observed in the control esophageal epithelia; although, their distribution differed depending on the enzyme examined. In the RE model, immunoreactivity of these cathepsins was increased in esophageal epithelial cells and activated macrophages. The immunoreactivity for cathepsins F, H, S and X was barely detectable in the control esophageal epithelium. However, in the RE model, we noticed a slight increase in the expression of cathepsins H and X in the epithelial cells. Furthermore, activated macrophages of the RE model possessed intense immunoreactivity for these cathepsins, which may have been related to esophageal inflammatory mechanisms.
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Suyama
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Koike
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Asaoka
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mori
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Masako
authors.initials: M
authors.lastname: Oguro
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ueno
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Nagahara
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan.
authors.forename: Sumio
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: Department of Gastroenterology (MS, DA, HM, MO, AN, SW), Juntendo University School of Medicine, Tokyo, JapanDepartment of Cell Biology and Neuroscience (MK,YU), Juntendo University School of Medicine, Tokyo, JapanCenter for Biomedical Research Resources (TU), Juntendo University Graduate School of Medicine, Tokyo, JapanDepartment of Cellular and Molecular Neuropathology (YU), Juntendo University Graduate School of Medicine, Tokyo, Japan y-uchi@juntendo.ac.jp.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Uchiyama
mesh_terms: D000818:Animals; D057055:Aspartic Acid Proteases / Q000378:metabolism; D002403:Cathepsins / Q000276:immunology / Q000378:metabolism*; D002908:Chronic Disease; D057056:Cysteine Proteases / Q000378:metabolism; D004942:Esophagitis, Peptic / Q000201:enzymology* / Q000473:pathology; D004947:Esophagus / Q000201:enzymology* / Q000473:pathology; D008264:Macrophages / Q000201:enzymology; D008297:Male; D009092:Mucous Membrane / Q000201:enzymology; D021381:Protein Transport; D051381:Rats; D017208:Rats, Wistar; D015854:Up-Regulation
chemical_list: D057055:Aspartic Acid Proteases; D002403:Cathepsins; D057056:Cysteine Proteases
keywords: cathepsin; inflammation; lysosomal proteinase; macrophage; reflux esophagitis