Cytoskeletal Dynamics in Intestinal Epithelial Cells
Summary
The intestinal epithelium is lined by a single layer of highly polarised cells whose apical surface is distinguished by densely packed microvilli. These finger-like projections depend on a dynamic actin filament core that underpins nutrient absorption, barrier integrity and wound repair. Actin filaments (F-actin) are organised into parallel bundles by specialised cross-linking proteins such as villin, fimbrin and espin, and are anchored to the plasma membrane by ezrin and related members of the ERM (ezrin–radixin–moesin) family. Beneath this cortical layer, a network of spectrin and tropomyosin provides mechanical resilience and regulates membrane domains. The balance between filament bundling, severing and polymerisation is controlled by local calcium signals, tyrosine phosphorylation and Rho-family GTPases, which together orchestrate cell shape change, migration and turnover along the crypt–villus axis. Microtubules and intermediate filaments further interact with the actin cortex to direct vesicular traffic and maintain apicobasal polarity. Dysregulation of these pathways can compromise absorptive function, promote bacterial translocation and contribute to inflammatory bowel disorders or tumour invasion. Recent advances in live-cell imaging and biophysical probing have begun to reveal how mechanical forces and biochemical cues converge at the cytoskeletal interface to regulate epithelial resilience under flow, stress and during rapid cellular renewal.
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Cytoskeletal Dynamics in Intestinal Epithelial Cells publication trend
The graph below shows the total number of articles in cytoskeletal dynamics in intestinal epithelial cells across all publications each year (not limited to Nature Index journals).
Technical terms
F-actin: Filamentous polymer of actin monomers that forms the core of microvilli and stress fibres.
Microvillus: Apical membrane projection supported by a parallel bundle of actin filaments, increasing absorptive surface area.
Villin: Calcium-regulated actin-binding protein that bundles and severs filaments to shape intestinal microvilli.
ERM proteins: Family of membrane-to-cytoskeleton linkers (ezrin, radixin, moesin) that stabilise cortical actin.
Rho GTPases: Molecular switches that regulate actin polymerisation, contractility and cell migration.
References
- Atomic force microscopy as analytical tool to study physico-mechanical properties of intestinal cells. Beilstein Journal of Nanotechnology (2015).
- Potential Molecular Mechanism for c-Src Kinase-mediated Regulation of Intestinal Cell Migration*. Journal of Biological Chemistry (2008).
- Villin Function in the Organization of the Actin Cytoskeleton CORRELATION OF IN VIVO EFFECTS TO ITS BIOCHEMICAL ACTIVITIES IN VITRO*. Journal of Biological Chemistry (1999).
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