ArticlePLoS pathogens2014
VE-cadherin cleavage by LasB protease from Pseudomonas aeruginosa facilitates type III secretion system toxicity in endothelial cells.
Article in PLoS pathogens, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.
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Who cites it
45 citing papers in PubMed, 70 citations in OpenAlex.
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- Endothelial ADAM10 utilization defines a molecular pathway of vascular injury in mice with bacterial sepsis.The Journal of clinical investigation · 2023Article
- Spleen Tyrosine Kinase phosphorylates VE-cadherin to cause endothelial barrier disruption in acute lung injury.The Journal of biological chemistry · 2023Article
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- The matricellular protein thrombospondin-1 in lung inflammation and injury.American journal of physiology. Cell physiology · 2022Review
- Adsorption of extracellular proteases and pyocyanin produced byCurrent research in microbial sciences · 2022Article
- Molecular Mechanisms Involved in Pseudomonas aeruginosa Bacteremia.Advances in experimental medicine and biology · 2022Review
- The Role ofToxins · 2021Review
- Pathogenesis of Gram-Negative Bacteremia.Clinical microbiology reviews · 2021Review
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- PAR-2-activated secretion by airway gland serous cells: role for CFTR and inhibition byAmerican journal of physiology. Lung cellular and molecular physiology · 2021Article
- Virulence factors impair epithelial junctions during bacterial infection.Journal of clinical laboratory analysis · 2021Review
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Infection of the vascular system by Pseudomonas aeruginosa (Pa) occurs during bacterial dissemination in the body or in blood-borne infections. Type 3 secretion system (T3SS) toxins from Pa induce a massive retraction when injected into endothelial cells. Here, we addressed the role of type 2 secretion system (T2SS) effectors in this process. Mutants with an inactive T2SS were much less effective than wild-type strains at inducing cell retraction. Furthermore, secretomes from wild-types were sufficient to trigger cell-cell junction opening when applied to cells, while T2SS-inactivated mutants had minimal activity. Intoxication was associated with decreased levels of vascular endothelial (VE)-cadherin, a homophilic adhesive protein located at endothelial cell-cell junctions. During the process, the protein was cleaved in the middle of its extracellular domain (positions 335 and 349). VE-cadherin attrition was T3SS-independent but T2SS-dependent. Interestingly, the epithelial (E)-cadherin was unaffected by T2SS effectors, indicating that this mechanism is specific to endothelial cells. We showed that one of the T2SS effectors, the protease LasB, directly affected VE-cadherin proteolysis, hence promoting cell-cell junction disruption. Furthermore, mouse infection with Pa to induce acute pneumonia lead to significant decreases in lung VE-cadherin levels, whereas the decrease was minimal with T2SS-inactivated or LasB-deleted mutant strains. We conclude that the T2SS plays a pivotal role during Pa infection of the vascular system by breaching the endothelial barrier, and propose a model in which the T2SS and the T3SS cooperate to intoxicate endothelial cells.
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