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Cell migration strategies in 3-D extracellular matrix: differences in morphology, cell matrix interactions, and
P Friedl1, K S Zänker, E B Bröcker
1Department of Dermatology, University of Würzburg, Germany. Peter.fr@mail.uni-wuerzburg.de
Microscopy Research and Technique
|December 19, 1998
Summary
Cell migration in 3D collagen matrices differs significantly between cell types. Invasive melanoma cells use integrin-dependent adhesion for slow, persistent movement, while leukocytes exhibit rapid, flexible migration independent of integrins.
Area of Science:
- Cell Biology
- Biophysics
- Biomechanics
Background:
- Cell migration through the extracellular matrix (ECM) involves complex adhesion dynamics and overcoming biophysical resistance.
- Understanding cell-matrix interactions is crucial for various biological processes, including development, immunity, and cancer metastasis.
Purpose of the Study:
- To investigate the molecular principles governing cell-matrix interactions and migration strategies of different cell types within a 3D collagen matrix.
- To compare the migration behaviors and underlying mechanisms of invasive tumor cells and leukocytes.
Main Methods:
- Utilized a 3D collagen matrix migration model.
- Employed computer-assisted cell tracking for migration path reconstruction.
- Applied confocal microscopy to visualize cell-matrix interactions.
- Analyzed beta1 integrin expression and clustering.
Main Results:
- Highly invasive MV3 melanoma cells and fibroblasts exhibited slow, persistent migration (0.1-0.5 µm/min) using beta1 integrin-dependent adhesion and matrix remodeling.
- T lymphocytes and dendritic cells displayed rapid (10-40x higher velocity) and less persistent migration, largely independent of beta1 integrin and focal adhesions.
- Tumor cell migration induced collagen fiber reorientation and matrix degradation, unlike the transient interactions of leukocytes.
Conclusions:
- The 3D ECM presents a complex substrate distinct from planar surfaces, necessitating varied migration strategies.
- Large, slowly migrating cells like melanoma utilize adhesive, integrin-dependent mechanisms that can remodel the ECM.
- Leukocytes employ rapid, flexible, integrin-independent strategies without significant matrix remodeling.