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Endothelial cell protrusion and migration in three-dimensional collagen matrices
Gabriel G Martins1, John Kolega
1Division of Anatomy and Cell Biology, School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York, USA. gaby@fc.ul.pt
Cell Motility and the Cytoskeleton
|January 6, 2006
Summary
Cell migration differs significantly between 3D matrices and 2D surfaces. Endothelial cells (ECs) exhibit distinct pseudopodia and lamellae, with the intermediate cytoplasmic zone playing a key role in motility.
Area of Science:
- Cell biology
- Biophysics
- Mechanobiology
Background:
- Cell migration morphology varies greatly between 3D matrices and 2D surfaces.
- Understanding these differences is crucial for cell migration research.
Purpose of the Study:
- To investigate the locomotive structure and behavior of endothelial cells (ECs) in 3D collagen gels versus on 2D surfaces.
- To identify key morphological and functional differences and similarities in cell migration.
Main Methods:
- Time-lapse imaging
- Immunofluorescence microscopy
- Confocal microscopy
Main Results:
- ECs formed cylindrical branching pseudopodia in 3D matrices and wide flat lamellae on 2D surfaces.
- Three distinct cytoplasmic zones (peripheral, intermediate, central) were identified in both conditions.
- The intermediate zone showed significant differences in shape and movement, influencing cell-matrix adhesions and cytoplasmic flow.
Conclusions:
- A conceptual framework for understanding cell behavior in 2D vs. 3D environments was established.
- Cytoskeletal dynamics in the intermediate cytoplasmic zone are critical for cell motility in general.