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• W2343670128 abstract "Crohn's disease (CD) is a chronic inflammatory enteropathy characterized by fibrotic strictures. Myofibroblasts (MFBs) are stromal cells of the gastrointestinal tract found in increased numbers in patients with CD and represent the key effector cells involved in pathologic fibrosis. MFB is a known target of tumor necrosis factor alpha (TNF-α), a proinflammatory cytokine strongly implicated in the pathophysiology of CD. However, the precise mechanisms through which TNF-α contributes to fibrosis remain incompletely understood. Here, we demonstrate for the first time that TNF-α increases MFB migration through the cyclooxygenase 2 (COX-2) and heat-shock protein 27 (Hsp27) pathways.The human colonic MFB cell line 18Co was grown to confluence on 35 × 10 mm cell culture dishes and used from passages 8-14. An in vitro scratch assay assessed the effect of TNF-α (10 ng/mL) on MFB migration over 24 h in the presence or absence of several inhibitors (NS398, SB203580, Hsp27 siRNA).TNF-α significantly increased MFB migration over 24 h. TNF-α also led to the increased expression of COX-2 and stimulated rapid phosphorylation of Hsp27 at serine 82. TNF-α-induced COX-2 expression, Hsp27 phosphorylation, and MFB migration were all significantly inhibited by the P38 MAPK inhibitor SB203580 (P < 0.05). TNF-α-induced MFB migration was also significantly inhibited by NS398 (P < 0.05), a direct inhibitor of COX-2, and by siRNA targeting Hsp27 (P < 0.05).TNF-α stimulates colonic MFB migration through P38 MAPK-mediated activation of COX-2 and Hsp27. Further elucidating these inflammatory signaling pathways may lead to novel therapeutic targets for the treatment of CD-related fibrosis and strictures." @default.
• W2343670128 created "2016-06-24" @default.
• W2343670128 creator A5007726050 @default.
• W2343670128 creator A5021816444 @default.
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• W2343670128 date "2016-07-01" @default.
• W2343670128 modified "2023-09-24" @default.
• W2343670128 title "TNF-α stimulates colonic myofibroblast migration via COX-2 and Hsp27" @default.
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• W2343670128 doi "https://doi.org/10.1016/j.jss.2016.04.034" @default.
• W2343670128 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5391874" @default.
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