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Mechanics of animal development.
1Dept. of Embryology, Faculty of Biology, Moscow State University, USSR.
Rivista Di Biologia
|January 1, 1990
Summary
Cellular forces drive morphogenetic movements through cytoskeleton and osmotic processes, creating mechanical stresses. These stresses organize epithelial tissues, leading to self-organized patterns and developmental trends like fold formation.
Area of Science:
- Developmental Biology
- Cell Biology
- Biophysics
Background:
- Morphogenetic movements are crucial for embryonic development.
- These movements are driven by active cellular forces.
- Cytoskeleton and osmotic processes generate these forces.
Purpose of the Study:
- To explore the mechanisms of cellular forces in morphogenetic movements.
- To discuss models of epithelial morphogenesis and fold formation.
- To understand the role of self-organization in tissue development.
Main Methods:
- Analysis of active cellular forces generated by cytoskeleton (actin microfilaments) and osmotic water transport.
- Modeling of epithelial morphogenesis, including cell sheet segregation and domain formation.
- Exploration of models for epithelial fold formation, such as the 'curvature increasing rule'.
Main Results:
- Cellular forces, primarily tensile stresses, are generated internally.
- These stresses create dynamic, spatially organized fields during development.
- A model of self-organization explains the segregation of cell sheets into polarized domains.
- The 'curvature increasing rule' model predicts a trefoiled archetype in epithelial rudiment development.
Conclusions:
- Morphogenetic movements are driven by intrinsic cellular forces.
- Self-organization and mechanical stresses play key roles in epithelial morphogenesis.
- Specific models can explain observed developmental patterns and fold formation in epithelial tissues.