Self-organized cytoskeletal alignment during Drosophila mesoderm invagination

Area of Science:

• Developmental Biology
• Cell Biology
• Biophysics

Background:

• Tissue morphogenesis involves mechanical forces that alter tissue shape.
• These forces influence cell behavior, creating self-organizing feedback loops.
• The cytoskeleton plays a crucial role in generating and responding to mechanical forces.

Purpose of the Study:

• To discuss cytoskeletal self-organization in morphogenesis.
• To present evidence for the cytoskeleton's role in directing force during tissue development.
• To explore the feedback mechanisms between mechanical forces and cell behavior.

Main Methods:

• Observational study of Drosophila mesoderm invagination.
• Analysis of mechanical patterns and cytoskeletal alignment.
• Discussion of self-organizing principles in cytoskeletal dynamics.

Main Results:

• The shape of initiating cells in Drosophila mesoderm invagination creates a mechanical pattern.
• This pattern aligns the cytoskeleton with the axis of greatest resistance to contraction.
• The force direction, controlled by the wild-type, dictates the invaginating mesoderm's shape and orientation.

Conclusions:

• Cytoskeletal self-organization is integral to directing forces during morphogenesis.
• Feedback mechanisms involving the actomyosin cytoskeleton are critical for tissue development.
• These principles likely apply to various morphogenetic events beyond Drosophila mesoderm invagination.