Self-organized tissue mechanics underlie embryonic regulation

Area of Science:

• Developmental Biology
• Cellular Mechanics
• Embryogenesis

Background:

• Early amniote development exhibits remarkable self-organization and adaptability.
• Embryonic regulation allows for the formation of complete embryos even after tissue manipulation.
• The molecular signals mediating these self-organization processes remain largely unidentified.

Purpose of the Study:

• To investigate the role of mechanical forces in early amniote embryonic self-organization.
• To elucidate the signaling mechanisms underlying tissue patterning and cell fate determination.
• To understand how mechanical feedback regulates embryonic development under normal and perturbed conditions.

Main Methods:

• Analysis of intact and mechanically perturbed quail embryos.
• Investigation of self-organizing mechanical forces, including contractility and tension.
• Examination of the modulation of gene expression by mechanical forces.

Main Results:

• Mechanical forces self-organize during embryogenesis, with local contractility activating and tension acting as a long-range inhibitor.
• This mechanical feedback governs tissue flows and the emergence of embryonic territories.
• Mechanical forces shape both tissue architecture and gene expression, ensuring robust yet plastic development.

Conclusions:

• Mechanical forces are central to embryonic self-organization, controlling tissue morphogenesis and gene expression.
• A mechanical feedback loop involving contractility and tension underlies robust and adaptable early development.
• Understanding these mechanical principles is key to deciphering the plasticity of embryonic development.