Towards a unified theory for morphomechanics

Area of Science:

• Developmental Biology
• Biophysics
• Computational Biology

Background:

• Mechanical forces are crucial for embryonic development.
• The precise mechanisms of mechanical feedback regulating these forces remain unclear.

Purpose of the Study:

• To propose a general principle for the mechanics of morphogenesis based on tissue stress feedback.
• To develop evolution equations describing growth/contraction and target stress regulation.

Main Methods:

• Formulated a pair of evolution equations based on feedback from tissue stress.
• Incorporated stress rate-dependent parameters into morphomechanical laws.
• Utilized computational models to simulate embryonic development behaviors.

Main Results:

• The proposed equations can capture diverse behaviors observed in developing embryos.
• Demonstrated the ability of the model to simulate tissue growth and adaptation.
• Identified limitations of the developed theoretical framework.

Conclusions:

• The proposed feedback model provides a fundamental principle for understanding morphogenesis.
• Applications include understanding the growth of organs (heart, brain), wound healing, and gastrulation.
• Insights can guide engineers in designing in vitro tissues and organs.