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In vitro Cell Migration and Invasion Assays
Published on: June 1, 2014
Annexin A2 regulates β1 integrin internalization and intestinal epithelial cell migration
Carl R Rankin1, Roland S Hilgarth, Giovanna Leoni
1Department of Pathology and Laboratory Medicine, Epithelial Pathobiology and Mucosal Inflammation Research Unit, Emory University, Atlanta, Georgia 30306, USA.
The Journal of Biological Chemistry
|April 6, 2013
Summary
Annexin A2 (AnxA2) is crucial for intestinal epithelial cells (IECs) to migrate and heal wounds by regulating cell-matrix adhesion dynamics. Loss of AnxA2 impairs wound closure by affecting β1 integrin turnover.
Area of Science:
- Gastroenterology
- Cell Biology
- Wound Healing Research
Background:
- The gastrointestinal epithelium is a vital barrier for mucosal homeostasis.
- Wounds compromise this barrier, necessitating rapid epithelial repair.
- Annexin A2 (AnxA2) is upregulated in migrating intestinal epithelial cells (IECs) and promotes wound closure.
Purpose of the Study:
- To elucidate the mechanisms by which AnxA2 facilitates IEC migration and wound healing.
- To investigate the role of AnxA2 in regulating cell-matrix adhesion and integrin dynamics.
Main Methods:
- Generated IECs with stable AnxA2 downregulation using AnxA2-specific shRNA (loss-of-function).
- Assessed IEC migration, cell-matrix adhesion, and β1 integrin levels.
- Utilized pulse-chase biotinylation to study β1 integrin internalization and degradation.
Main Results:
- AnxA2 loss inhibited IEC migration and enhanced cell-matrix adhesion.
- Reduced AnxA2 levels correlated with increased β1 integrin protein.
- IECs lacking AnxA2 showed increased cell surface β1 integrin with decreased internalization and degradation.
Conclusions:
- AnxA2 plays a critical role in controlling β1 integrin dynamics at the cell surface.
- AnxA2 is essential for the turnover of cell-matrix adhesions, enabling IEC migration and wound closure.
Keywords:
Annexin 2Annexin A2Cell MigrationEndocytosisIntegrinIntestinal EpitheliumWound Healingβ1 IntegrinMore Related Videos
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