Galectin-2 and -4, but not Galectin-1, promote intestinal epithelial wound healing in vitro through a TGF-beta-independent mechanism
Article first published online: 17 MAY 2008
Copyright © 2008 Crohn's & Colitis Foundation of America, Inc.
Inflammatory Bowel Diseases
Volume 14, Issue 10, pages 1366–1372, October 2008
How to Cite
Paclik, D., Lohse, K., Wiedenmann, B., Dignass, A. U. and Sturm, A. (2008), Galectin-2 and -4, but not Galectin-1, promote intestinal epithelial wound healing in vitro through a TGF-beta-independent mechanism. Inflamm Bowel Dis, 14: 1366–1372. doi: 10.1002/ibd.20499
- Issue published online: 11 SEP 2008
- Article first published online: 17 MAY 2008
- Manuscript Accepted: 7 APR 2008
- Manuscript Received: 4 APR 2008
- Broad Medical Research Program of Eli and Edythe Broad Foundation and by the Forschungsförderung of the Charité, Universitätsmedizin Berlin
Vol. 17, Issue 6, 1449, Article first published online: 10 MAY 2011
- epithelial cells;
- inflammatory bowel diseases;
Background: Inflammatory bowel diseases (IBDs) are characterized by various degrees of mucosal surface damage and subsequent impairment of the intestinal barrier function. Resealing of the epithelial barrier requires intestinal cell migration and proliferation. Galectins are increasingly recognized as novel regulators of inflammation. Thus, we aimed to explore the effect of galectin-2 (Gal-2) and Gal-4 on epithelial cell function and wound healing.
Methods: Binding of Gal-2 and Gal-4 was determined by flow cytometric analysis and binding sites by SDS-PAGE electrophoresis. Cell migration by Gal-1, -2, and -4 was determined by a wound-healing assay. Cell cycle analysis and detection of apoptosis were determined by flow cytometric analysis.
Results: Gal-2 and Gal-4 bind to epithelial cells at the E-cadherin/β-catenin complex. Both galectins significantly enhanced intestinal epithelial cell restitution in vitro. This enhancement of epithelial cell restitution was TGF-β-independent. In contrast, Gal-1 decreased epithelial cell migration TGF-β dependently. By performing cell cycle analysis, we show that Gal-2 and Gal-4 increased cyclin B1 expression and consequently cell cycle progression, while Gal-1 inhibited cell cycling. Determining the influence of Gal-2 and Gal-4 on epithelial cell apoptosis, we showed no induction of apoptosis, whereas Gal-1 significantly induced apoptosis of epithelial cells caspase-independently.
Conclusions: Gal-2 and Gal-4 bind to intestinal epithelial cells and promote their restitution. Thus, our study provides for the first time evidence that these galectins play a significant role in intestinal wound-healing processes and might exert beneficial effects in diseases characterized by epithelial barrier disruption like IBDs.
(Inflamm Bowel Dis 2008)