Virus interaction with the apical junctional complex

Area of Science:

• Virology
• Cell Biology
• Immunology

Background:

• Pathogens must overcome epithelial barriers to infect hosts.
• Epithelial cells form a barrier sealed by the apical junctional complex (AJC), comprising tight and adherens junctions.
• Viruses utilize cellular receptors to initiate infection.

Purpose of the Study:

• To review how various viruses use AJC proteins as cellular receptors.
• To explore the role of AJC proteins in viral tropism.
• To discuss viral strategies for accessing basolateral receptors via AJC interactions.

Main Methods:

• Literature review of viral entry mechanisms.
• Analysis of viral interactions with epithelial junctional proteins.
• Identification of specific viral receptors and co-receptors.

Main Results:

• Numerous viruses (e.g., coxsackie, adenovirus, poliovirus, hepatitis C) use AJC integral proteins as cellular receptors.
• Interaction with AJC proteins significantly defines viral tropism.
• Viruses also use basolateral co-receptors like integrins.

Conclusions:

• AJC proteins are critical cellular receptors for a wide range of viruses.
• Targeting AJC proteins is a key viral strategy for infection.
• Understanding these interactions may reveal new therapeutic targets.