Hypoxia Reduces the Transcription of Fibrotic Markers in the Intestinal Mucosa
| Autor: | Simona Simmen, Max Maane, Sarah Rogler, Katherina Baebler, Silvia Lang, Jesus Cosin-Roger, Kirstin Atrott, Isabelle Frey-Wagner, Partick Spielmann, Roland H. Wenger, Bruce Weder, Jonas Zeitz, Stephan R. Vavricka, Gerhard Rogler, Cheryl de Vallière, Martin Hausmann, Pedro A. Ruiz |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Inflammatory Intestinal Diseases, Pp 1-14 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2296-9403 2296-9365 00051306 |
| DOI: | 10.1159/000513061 |
| Popis: | Introduction: Intestinal fibrosis, characterized by excessive deposition of extracellular matrix proteins, is a common and severe clinical complication of inflammatory bowel disease (IBD). However, the mechanisms underlying fibrosis remain elusive, and currently, there are limited effective pharmacologic treatments that target the development of fibrosis. Hypoxia is one of the key microenvironmental factors influencing intestinal inflammation and has been linked to fibrosis. Objective: In the present study, we sought to elucidate the impact of hypoxia on fibrotic gene expression in the intestinal mucosa. Methods: Human volunteers, IBD patients, and dextran sulphate sodium-treated mice were exposed to hypoxia, and colonic biopsies were collected. The human intestinal epithelial cell line Caco-2, human THP-1 macrophages, and primary human gut fibroblasts were subjected to hypoxia, and changes in fibrotic gene expression were assessed. Results: Human volunteers subjected to hypoxia presented reduced transcriptional levels of fibrotic and epithelial-mesenchymal transition markers in the intestinal mucosa. IBD patients showed a trend towards a decrease in tissue inhibitor of metalloproteinase 1 protein expression. In mice, hypoxic conditions reduced the colonic expression of several collagens and matrix metalloproteinases. Hypoxic Caco-2 cells, THP-1 cells, and primary gut fibroblasts showed a significant downregulation in the expression of fibrotic and tissue remodelling factors. Conclusions: Stabilization of hypoxia-inducible factors might represent a novel therapeutic approach for the treatment of IBD-associated fibrosis. |
| Databáze: | Directory of Open Access Journals |
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