Cited by 55Cell Adhesion Molecules ResearchS100 Proteins and AnnexinsCellular Mechanics and Interactions

Annexin A2 Regulates β1 Integrin Internalization and Intestinal Epithelial Cell Migration

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Rankin, Carl R., Hilgarth, Roland S., Leoni, Giovanna, Kwon, Mike, Den Beste, Kyle A., Parkos, Charles A., Nusrat, Asma·2013·Journal of Biological Chemistry

Abstract

The gastrointestinal epithelium functions as an important barrier that separates luminal contents from the underlying tissue compartment and is vital in maintaining mucosal homeostasis. Mucosal wounds in inflammatory disorders compromise the critical epithelial barrier. In response to injury, intestinal epithelial cells (IECs) rapidly migrate to reseal wounds. We have previously observed that a membrane-associated, actin binding protein, annexin A2 (AnxA2), is up-regulated in migrating IECs and plays an important role in promoting wound closure. To identify the mechanisms by which AnxA2 promotes IEC movement and wound closure, we used a loss of function approach. AnxA2-specific shRNA was utilized to generate IECs with stable down-regulation of AnxA2. Loss of AnxA2 inhibited IEC migration while promoting enhanced cell-matrix adhesion. These functional effects were associated with increased levels of β1 integrin protein, which is reported to play an important role in mediating the cell-matrix adhesive properties of epithelial cells. Because cell migration requires dynamic turnover of integrin-based adhesions, we tested whether AnxA2 modulates internalization of cell surface β1 integrin required for forward cell movement. Indeed, pulse-chase biotinylation experiments in IECs lacking AnxA2 demonstrated a significant increase in cell surface β1 integrin that was accompanied by decreased β1 integrin internalization and degradation. These findings support an important role of AnxA2 in controlling dynamics of β1 integrin at the cell surface that in turn is required for the active turnover of cell-matrix associations, cell migration, and wound closure. Background: Intestinal epithelial wound closure requires dynamic regulation/turnover of cell-matrix adhesions. Results: Down-regulation of annexin A2 increases cell-matrix adhesion and delays β1 integrin internalization from the plasma membrane. Conclusion: Annexin A2 promotes wound closure by regulating internalization of β1 integrin in migrating epithelial cells. Significance: This study identifies a novel role of annexin A2 in regulating β1 integrin internalization required for intestinal epithelial cell migration.

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Crossref · 10.1074/jbc.m112.440909

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  • ANXA2 has previously been shown to regulate cell migration in other disease settings including carcinogenesis.

    “ANXA2, which we have identified as a key marker in both human and mouse migratory hepatocytes, has been previously shown to regulate cell migration in other disease settings including carcinogenesis21–23”

    From Multimodal decoding of human liver regeneration (2024) · cites this paper as [21]

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Authors
Rankin, C. R., Hilgarth, R. S., Leoni, G., Kwon, M., Den Beste, K. A., Parkos, C. A., & Nusrat, A.
Affiliations
Emory University (US)
Corresponding author
Nusrat, Asma
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2013-05
Volume
288
Issue
21
Pages
15229-15239
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2003489386
Cited by
55
References
50
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 3 · 2022: 7 · 2021: 4 · 2020: 5 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 4 · 2015: 3 · 2014: 8 · 2013: 2
FWCI
5.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK055679, R24DK064399, R01DK061379, R01DK072564, DK059888, R01DK059888, R01DK079392)
Topics
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › S100 Proteins and Annexins
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
annexin A2, beta1 integrin, integrin internalization, intestinal epithelial cell migration, cell-matrix adhesion, epithelial barrier function, actin-binding proteins
MeSH terms
Cell Adhesion, Cell Movement, Epithelial Cells, Extracellular Matrix, Humans, Intestinal Mucosa, Wound Healing, Annexin A2, Caco-2 Cells, Integrin beta1, Protein Transport, Proteolysis

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