Self-organized patterning of cell morphology via mechanosensitive feedback

Area of Science:

• Developmental biology
• Cellular mechanics
• Morphogenesis

Background:

• Tissue organization relies on specific cell morphology patterns.
• Understanding the emergence of these patterns in developing tissues is crucial.

Purpose of the Study:

• Investigate the emergence of tissue-scale cell shape and mechanical stress patterns.
• Elucidate the self-organization mechanisms driving tissue morphogenesis in the Drosophila wing imaginal disc.

Main Methods:

• Quantitative analysis of cellular dynamics.
• Development of a laser ablation method for mapping tissue stresses.
• Continuum theory modeling of mechanical feedback loops.

Main Results:

• Identified radially oriented cell rearrangements coupled to tangential cell elongation.
• Mapped tissue stresses and extracted key mechanical parameters.
• Demonstrated that mechanical feedback coupling cell polarity and rearrangements can self-organize these patterns.

Conclusions:

• A self-organizing mechanical feedback mechanism explains the emergence of cellular patterns and tissue stress.
• Knockdown of MyoVI supports the role of mechanosensitive feedback in this process.
• Revealed a fundamental mechanism for cellular pattern formation during morphogenesis.