Amoeboid movement
| Parent |
| Cell migration |
| Subordinate |
| Migration of fibroblasts / epithelial cells / neural crest cells during gastrulation |
| Gene Ontology |
|---|
| QuickGO |
The amoeboid movement describes a creeping movement of cells, e.g. B. amoeba , certain leukocytes , amoebic algae and some cancer cells.
Cause and how it works
The amoeboid movement is controlled via chemical attractants, e.g. B. the prey items ( chemotaxis ). In the direction of the creeping movement (also known as the leading edge), sack-like protuberances ( pseudopodia ), as well as thread-like ( filopodia ) and lamellar ( lamellipodia ) extensions are formed. The cells are anchored to the surface via focal contacts (stress fibers). Various processes cause the amoeboid cell to move. On the one hand, actomyosin contracts, similar to a muscle in the rear area of the cell, and exerts pressure on the rear end and thus leads to a forward movement while at the same time loosening the front end. Furthermore, F- actin accumulates on the processes and a flow movement is caused by exocytosis at these points. In addition, the subsequent breakdown of F-actin into water-soluble G-actin causes osmotic pressure, which causes this area of the cell to swell.
See also
literature
- Helmut Plattner, Joachim Hentschel: Cell Biology . Thieme Verlag, Stuttgart 2006 , ISBN 3-13-106513-3 .
- Eckehart Johannes Jäger, Stefanie Neumann, Erich Ohmann: Botany . Spectrum Akademischer Verlag, Heidelberg 2003 , ISBN 3-8274-0921-7 .