Activation of p38 Mitogen-Activated Protein Kinase Promotes Peritoneal Fibrosis by Regulating Fibrocytes
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- Satoshi Kokubo
- Department of Disease Control and Homeostasis, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Norihiko Sakai
- Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, and Division of Blood Purification, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Kengo Furuichi
- Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, and Division of Blood Purification, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Tadashi Toyama
- Department of Disease Control and Homeostasis, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Shinji Kitajima
- Department of Disease Control and Homeostasis, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Toshiya Okumura
- Department of Disease Control and Homeostasis, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Kouji Matsushima
- Kanazawa University Hospital, Kanazawa University, Kanazawa; Department of Molecular Preventive Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Shuichi Kaneko
- Department of Disease Control and Homeostasis, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
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- Takashi Wada
- Graduate School of Medicine, The University of Tokyo, Tokyo; and Department of Laboratory Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Medicine, Kanazawa University, Kanazawa, Japan
説明
<jats:sec><jats:title>Background</jats:title><jats:p> Peritoneal fibrosis is a serious complication of long-term peritoneal dialysis, and yet the precise pathogenic mechanisms of peritoneal fibrosis remain unknown. Fibrocytes participate in tissue fibrosis and express chemokine receptors that are necessary for migration. The p38 mitogen-activated protein kinase (MAPK) pathway regulates the production of chemokines and has been demonstrated to contribute to the pathogenesis of various fibrotic conditions. Accordingly, we used an experimental mouse model of peritoneal fibrosis to examine the dependency of fibrocytes on p38MAPK signaling. </jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p> Peritoneal fibrosis was induced in mice by the injection of 0.1% chlorhexidine gluconate (CG) into the abdominal cavity. Mice were treated with FR167653, a specific inhibitor of p38MAPK, and immunohistochemical studies were performed to detect fibrocytes and cells positive for phosphorylated p38MAPK. The involvement of p38MAPK in the activation of fibrocytes also was also investigated in vitro. </jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p> Fibrocytes infiltrated peritoneum in response to CG, and that response was accompanied by progressive peritoneal fibrosis. The phosphorylation of p38MAPK, as defined by CD45+ spindle-shaped cells, was detected both in peritoneal mesothelial cells and in fibrocytes. The level of peritoneal expression of CCL2, a chemoattractant for fibrocytes, was upregulated by CG injection, and treatment with FR167653 reduced the number of cells positive for phosphorylated p38MAPK, the peritoneal expression of CCL2, and the extent of peritoneal fibrosis. Pretreatment with FR167653 inhibited the expression of procollagen type I α1 induced by transforming growth factor-β1 </jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p> Our results suggest that p38MAPK signaling contributes to peritoneal fibrosis by regulating fibrocyte function. </jats:p></jats:sec>
収録刊行物
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- Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
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Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis 32 (1), 10-19, 2012-01
SAGE Publications
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詳細情報 詳細情報について
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- CRID
- 1360848664561473664
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- ISSN
- 17184304
- 08968608
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- データソース種別
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- Crossref
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