Cited by 73Inflammatory Bowel DiseaseProtease and Inhibitor MechanismsBlood Coagulation and Thrombosis Mechanisms

Luminal Cathepsin G and Protease-Activated Receptor 4

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Dabek, Marta, Ferrier, Laurent, Roka, Richard, Gecse, Krisztina, Annahazi, Anita, Moreau, Jacques, Escourrou, Jean, Cartier, Christel +6 more·2009·The American Journal of Pathology

Abstract

Impairment of the colonic epithelial barrier and neutrophil infiltration are common features of inflammatory bowel disease. Luminal proteases affect colonic permeability through protease-activated receptors (PARs). We evaluated: (i) whether fecal supernatants from patients with ulcerative colitis (UC) trigger alterations of colonic paracellular permeability and inflammation, and (ii) the roles of cathepsin G (Cat-G), a neutrophil serine protease, and its selective receptor, PAR(4), in these processes. Expression levels of both PAR(4) and Cat-G were determined in colonic biopsies from UC and healthy subjects. The effects of UC fecal supernatants on colonic paracellular permeability were measured in murine colonic strips. Involvement of Cat-G and PAR(4) was evaluated using pepducin P4pal-10 and specific Cat-G inhibitor (SCGI), respectively. In addition, the effect of PAR(4)-activating peptide was assessed. UC fecal supernatants, either untreated or pretreated with SCGI, were infused into mice, and myeloperoxidase activity was determined. PAR(4) was found to be overexpressed in UC colonic biopsies. Increased colonic paracellular permeability that was triggered by UC fecal supernatants was blocked by both SCGI (77%) and P4pal-10 (85%). Intracolonic infusion of UC fecal supernatants into mice increased myeloperoxidase activity. This effect was abolished by SCGI. These observations support that both Cat-G and PAR(4) play key roles in generating and/or amplifying relapses in UC and provide a rationale for the development of new therapeutic agents in the treatment of this disease.

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Crossref · 10.2353/ajpath.2009.080986

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  • In Crohn's disease and ulcerative colitis patients, increased host serine protease production from colonic tissue has been reported.

    “In both CD and UC patients, increased host serine protease production from colonic tissue have been reported.27,28”
  • PAR-4 activation by cathepsin G, a protease elevated in fecal samples from UC patients, led to increased mucosal permeability and inflammation in vivo in mice.

    “PAR-4 activation by cathepsin G, a protease that is elevated in fecal samples from UC patients, led to increased mucosal permeability and inflammation in vivo in mice.28”

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Authors
Dabek, M., Ferrier, L., Roka, R., Gecse, K., Annahazi, A., Moreau, J., Escourrou, J., Cartier, C., Chaumaz, G., Leveque, M., Ait-Belgnaoui, A., Wittmann, T., Theodorou, V., & Bueno, L.
Affiliations
  • Institut National de la Recherche Agronomique (FR)
  • University of Szeged (HU)
  • Hôpital Rangueil (FR)
Corresponding author
Bueno, Lionel
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2009-07
Volume
175
Issue
1
Pages
207-214
ISSN
0002-9440 (ISSN-L)
OpenAlex
W1562821701
Cited by
73
References
39
Citations by year
2026: 3 · 2025: 3 · 2024: 6 · 2023: 4 · 2022: 5 · 2021: 4 · 2020: 7 · 2019: 3 · 2018: 5 · 2017: 3 · 2016: 8 · 2015: 1 · 2014: 4 · 2013: 3 · 2012: 2
FWCI
2.73
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Pure Amsterdam UMC (submittedVersion)
Funders
  • Institut National de la Recherche Agronomique
  • Agence Nationale pour la Gestion des Déchets Radioactifs
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
cathepsin G, PAR4, ulcerative colitis, colonic epithelial barrier, neutrophil serine proteases, fecal supernatants, myeloperoxidase, neutrophil infiltration
MeSH terms
Adult, Aged, Animals, Cathepsins, Cell Membrane Permeability, Colitis, Ulcerative, Feces, Humans, Immunohistochemistry, Intestinal Mucosa, Male, Mice, Inbred BALB C, Mice, Inbred C57BL, Middle Aged, Serine Endopeptidases, Blotting, Western, Receptors, Thrombin, Reverse Transcriptase Polymerase Chain Reaction, Mice, Cathepsin G

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