Regulation and function of specialized membrane protrusions in intercellular communication.

Specialized membrane protrusions like tunnelling nanotubes and cytonemes are more prevalent and functionally diverse than previously understood, crucial for intercellular communication in tissues.

• Why it matters: Understanding these structures is vital because they coordinate cell behavior over distances, impacting development, immune responses, and disease, yet their regulation and roles remain incompletely known.
• What they did: The review summarizes recent research on the formation, regulation, and cargo transfer of tunnelling nanotubes and cytonemes, emphasizing shared principles of their architecture and function.
• The result: Insights into their dysregulation reveal contributions to pathology, highlighting the importance of incorporating these structures into models of tissue organization and disease mechanisms.