Desmosomes and Intermediate Filaments: Their Consequences for Tissue Mechanics

Area of Science:

• Cell biology
• Biophysics
• Tissue mechanics

Background:

• Adherens junctions (AJs) link actin filaments and are involved in mechanosensing.
• Desmosomes and intermediate filaments (IFs) link keratin filaments, providing tissue stability under mechanical stress.
• Keratins influence cell mechanics but do not generate tension.

Purpose of the Study:

• To summarize the current understanding of IFs and desmosomes in tissue mechanics.
• To discuss the potential role of the desmosome-keratin scaffold in mechanosensing.
• To explore the conversion of chemical signals into mechanical strength.

Main Methods:

• Literature review and synthesis of existing research.
• Analysis of the mechanical roles of cytoskeletal components.
• Discussion of signaling pathways involved in mechanotransduction.

Main Results:

• AJs and desmosomes form mechanical units connecting adjacent cells.
• Desmosomes are crucial for stable intercellular cohesion.
• IFs contribute to cell mechanics and tissue stability, but not tension generation.

Conclusions:

• Desmosomes and IFs are vital for maintaining tissue integrity and mechanical stability.
• The desmosome-keratin network may play an active role in mechanosensing.
• Further research is needed to elucidate the active mechanosensing capabilities of the desmosome-keratin system.