Interaction of pathogens with the endothelium

Area of Science:

• Cellular microbiology
• Immunology
• Vascular biology

Background:

• The endothelium forms a critical semi-permeable barrier at the blood-tissue interface.
• It is constantly exposed to pathogens and host defense mechanisms during inflammation.
• Endothelial cells are specifically targeted by pathogens and are involved in most inflammatory responses.

Purpose of the Study:

• To review mechanisms of endothelial infection by bacteria and viruses.
• To highlight the endothelium's active role in inflammatory responses to pathogens.
• To discuss how pathogens and host responses impact endothelial function.

Main Methods:

• Literature review focusing on cellular microbiology of endothelial infections.
• Analysis of pathogen strategies targeting endothelial cells.
• Examination of endothelial responses to infection and inflammation.

Main Results:

• Pathogens employ diverse strategies to infect endothelial cells, including receptor-mediated pathways and intracellular replication.
• Endothelial activation leads to barrier dysfunction, increased leukocyte interaction, mediator release, and procoagulant activity.
• Endothelial responses influence both pathogen survival and host defense dynamics.

Conclusions:

• The endothelium is not a passive target but an active participant that can exacerbate inflammatory struggles with pathogens.
• Understanding endothelial-pathogen interactions is key to comprehending inflammatory diseases.
• This review focuses on bacterial and viral mechanisms of endothelial infection.