Getting connected: actin-based cell-to-cell channels in plants and animals

Area of Science:

• Cell Biology
• Developmental Biology
• Cytoskeletal Dynamics

Background:

• Plant cells possess plasmodesmata, long-recognized cytoplasmic channels facilitating intercellular communication.
• These channels were historically viewed as unique to immobile, walled plant cells.
• Recent discoveries reveal dynamic intercellular channels in mobile animal cells.

Purpose of the Study:

• To discuss the significance of cell-to-cell channels in intercellular communication.
• To explore the role of these channels in the development and morphogenesis of multicellular organisms.
• To draw parallels between channel-mediated transport and the movement of endosomes and pathogens.

Main Methods:

• Comparative analysis of plant plasmodesmata and animal cell nanotubular channels.
• Examination of the role of the actin cytoskeleton and microtubules in channel structure and function.
• Review of existing literature on intercellular communication and transport mechanisms.

Main Results:

• Both plasmodesmata and animal cell channels are supported by the actin cytoskeleton and exclude microtubules.
• Intercellular channels in animal cells are highly dynamic and sensitive to mechanical stress.
• Cell-to-cell channels are crucial for intercellular communication and multicellular development.

Conclusions:

• Cell-to-cell channels are fundamental to multicellular life, involved in communication and morphogenesis.
• The actin cytoskeleton plays a key role in maintaining these dynamic intercellular connections.
• Further research could explore shared transport mechanisms with endosomes and pathogens.