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Updated: Aug 19, 2025
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Chemotactic Response of Marine Micro-Organisms to Micro-Scale Nutrient Layers
Published on: May 28, 2007
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Three-dimensional chiral morphodynamics of chemomechanical active shells
Sifan Yin1, Bo Li1, Xi-Qiao Feng1
1Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, P.R. China.
Summary
This study reveals how mechanical feedback in cell cortex dynamics drives 3D chiral morphogenesis. It explains spiral patterns and oscillations crucial for embryonic development.
Area of Science:
- Cell Biology
- Biophysics
- Developmental Biology
Background:
- Cellular morphogenesis involves complex 3D deformations and chemical signaling.
- Understanding the interplay between mechanics and biochemistry is key to cell development.
Purpose of the Study:
- To develop a chemomechanical active shell theory incorporating mechanical feedback and biochemical regulation.
- To investigate symmetry-breaking and 3D chiral morphodynamics in the cell cortex.
Main Methods:
- Established a chemomechanical active shell theory.
- Modeled feedback loops between mechanical deformation and biochemical signals (actomyosin, RhoA).
- Analyzed bifurcations leading to pattern formation like spiral waves and oscillations.
Main Results:
- Active deformations trigger chemomechanical bifurcations, generating pulse spiral waves and oscillations.
- Increasing mechanical feedback leads to traveling or standing waves.
- Mechanical feedback stabilizes pattern polarity, ensuring robust morphogenesis.
- Reproduces experimentally observed spiral patterns in embryogenesis.
Conclusions:
- Mechanical feedback plays a crucial role in cell development and morphogenesis.
- The proposed chemomechanical framework explains 3D large deformations and chemical signaling in living shell-like structures.
- Provides insights into asymmetric cleavage during embryogenesis (e.g., Xenopus, starfish).
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