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Leptospira interrogans binds to cadherins. PLoS Negl Trop Dis 2014;8(1):e2672 PMID: 24498454 PMCID: PMC3907533

Pubmed ID

24498454

DOI

10.1371/journal.pntd.0002672

Abstract

Leptospirosis, caused by pathogenic species of Leptospira, is the most widespread zoonosis and has emerged as a major public health problem worldwide. The adhesion of pathogenic Leptospira to host cells, and to extracellular matrix (ECM) components, is likely to be necessary for the ability of leptospires to penetrate, disseminate and persist in mammalian host tissues. Previous work demonstrated that pathogenic L. interrogans binds to host cells more efficiently than to ECM. Using two independent screening methods, mass spectrometry and protein arrays, members of the cadherin family were identified as potential L. interrogans receptors on mammalian host surfaces. We focused our investigation on vascular endothelial (VE)-cadherin, which is widely expressed on endothelia and is primarily responsible for endothelial cell-cell adhesion. Monolayers of EA.hy926 and HMEC-1 endothelial cells produce VE-cadherin, bind L. interrogans in vitro, and are disrupted upon incubation with the bacteria, which may reflect the endothelial damage seen in vivo. Dose-dependent and saturable binding of L. interrogans to the purified VE-cadherin receptor was demonstrated and pretreatment of purified receptor or endothelial cells with function-blocking antibody against VE-cadherin significantly inhibited bacterial attachment. The contribution of VE-cadherin to leptospiral adherence to host endothelial cell surfaces is biologically significant because VE-cadherin plays an important role in maintaining the barrier properties of the vasculature. Attachment of L. interrogans to the vasculature via VE-cadherin may result in vascular damage, facilitating the escape of the pathogen from the bloodstream into different tissues during disseminated infection, and may contribute to the hemorrhagic manifestations of leptospirosis. This work is first to describe a mammalian cell surface protein as a receptor for L. interrogans.

Author List

Evangelista K, Franco R, Schwab A, Coburn J

Author

Jenifer Coburn PhD Professor in the Medicine department at Medical College of Wisconsin




Scopus

2-s2.0-84893799614   22 Citations

MESH terms used to index this publication - Major topics in bold

Antigens, CD
Bacterial Adhesion
Cadherins
Cell Line
Humans
Leptospira interrogans
jenkins-FCD Prod-331 a335b1a6d1e9c32173c9534e6f6ff51494143916