Targeting of the apical junctional complex by bacterial pathogens

Area of Science:

• Microbiology
• Cell Biology
• Pathogenesis

Background:

• The apical junctional complex is vital for maintaining epithelial and endothelial integrity.
• Disruption of these junctions by bacterial pathogens can lead to host toxicity and systemic infection.
• Extracellular bacteria and toxins exploit the paracellular route to invade tissues.

Purpose of the Study:

• To review the diverse mechanisms employed by bacteria to disrupt the apical junctional complex.
• To categorize bacterial strategies for breaching host physical barriers.
• To highlight the creativity of bacterial pathogens in pathogenesis.

Main Methods:

• Literature review of bacterial pathogenesis mechanisms.
• Categorization of bacterial strategies based on their interaction with junctional complexes.
• Analysis of examples illustrating bacterial disruption tactics.

Main Results:

• Bacterial disruption of apical junctions occurs via three main strategies:
• 1. Proteolysis/perturbation of junctional proteins.
• 2. Manipulation of host regulatory pathways.
• 3. Delocalization of junctional complexes.
• Each strategy facilitates pathogen entry and spread.

Conclusions:

• Bacteria employ distinct and creative methods to compromise host physical barriers.
• Understanding these mechanisms is key to combating bacterial infections.
• Targeting junctional complex disruption offers potential therapeutic avenues.