Abstract:
AIM:Eph receptors and ephrin ligands play a pivotal role in development and tissue maintenance. Since previous data have indicated an involvement of ephrin-B2 in epithelial healing, we investigated the gene expression and downstream signaling pathways induced by ephrin-B mediated cell-cell signaling in intestinal epithelial cells. METHODS:Upon stimulation of ephrin-B pathways in IEC-6 cells with recombinant rat EphB1-Fc, gene expression was analyzed by Affymetrix(R) rat genome 230 high density arrays at different time points. Differentially expressed genes were confirmed by real-time RT-PCR. In addition, MAP kinase pathways and focal adhesion kinase (FAK) activation downstream of ephrin-B were investigated by immunoblotting and fluorescence microscopy. RESULTS:Stimulation of the ephrin-B reverse signaling pathway in IEC-6 cells induces predominant expression of genes known to be involved into wound healing/cell migration, antiapoptotic pathways, host defense and inflammation. Cox-2, c-Fos, Egr-1, Egr-2, and MCP-1 were found among the most significantly regulated genes. Furthermore, we show that the expression of repair-related genes is also accompanied by activation of the ERK1/2 MAP kinase pathway and FAK, two key regulators of epithelial restitution. CONCLUSION:Stimulation of the ephrin-B reverse signaling pathway induces a phenotype characterized by upregulation of repair-related genes, which may partially be mediated by ERK1/2 pathways.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Hafner C,Meyer S,Hagen I,Becker B,Roesch A,Landthaler M,Vogt Tdoi
10.3748/wjg.v11.i29.4511keywords:
subject
Has Abstractpub_date
2005-08-07 00:00:00pages
4511-8issue
29eissn
1007-9327issn
2219-2840journal_volume
11pub_type
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pub_type: 杂志文章
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pub_type: 杂志文章,评审
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更新日期:2014-02-14 00:00:00
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