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Topography of cell traces studied by atomic force microscopy.
H Zimmermann1, R Hagedorn, E Richter
1Lehrstuhl für Membranphysiologie, Institut für Biologie, Mathematisch-Naturwissenschaftliche Fakultät I, Humboldt-Universität zu Berlin, Invalidenstrasse 42, D-10115 Berlin, Germany.
European Biophysics Journal : EBJ
|August 25, 1999
Summary
Migrating mouse fibroblasts leave behind complex traces on surfaces. Atomic force microscopy reveals these structures suggest actin-protein involvement in their formation.
Area of Science:
- Cell biology
- Biophysics
- Materials science
Background:
- Adherent cells deposit material on substrates during migration.
- Understanding these cell-derived structures is crucial for cell dynamics research.
Purpose of the Study:
- To visualize and analyze the material traces left by migrating mouse fibroblasts (L929).
- To investigate the structural features and potential molecular basis of these cell traces.
Main Methods:
- Utilizing "non-contact" mode atomic force microscopy (AFM) in a liquid environment for high-resolution topographic imaging.
- Applying Fourier analysis to study spatial features and segment spacing within the fibroblast traces.
Main Results:
- AFM imaging revealed intricate networks with crossing and branching patterns, structured patches, nodular elements, and linear features.
- Spatial analysis indicated specific branching angles and segment spacing within the traces.
- The observed spatial features strongly suggest the involvement of actin and associated structural proteins in trace formation.
Conclusions:
- Cellular migration leaves behind complex, spatially organized traces on artificial substrates.
- The structural characteristics of these traces provide insights into the underlying cytoskeletal mechanisms, particularly actin involvement.
- The study presents effective methods for preparing and imaging these delicate cellular deposits.