NDLI: Gingipains of Porphyromonas gingivalis Modulate Leukocyte Adhesion Molecule Expression Induced in Human Endothelial Cells by Ligation of CD99

Content Provider	PubMed Central
Author	Yun, Peter L. W. Decarlo, Arthur A. Hunter, Neil
Copyright Year	2006
Abstract	Porphyromonas gingivalis has been implicated as a key etiologic agent in the pathogenesis of destructive chronic periodontitis. Among virulence factors of this organism are cysteine proteinases, or gingipains, that have the capacity to modulate host inflammatory defenses. Intercellular adhesion molecule expression by vascular endothelium represents a crucial process for leukocyte transendothelial migration into inflamed tissue. Ligation of CD99 on endothelial cells was shown to induce expression of endothelial leukocyte adhesion molecule 1, vascular cell adhesion molecule 1, intercellular adhesion molecule 1, and major histocompatibility complex class II molecules and to increase adhesion of leukocytes. CD99 ligation was also found to induce nuclear translocation of NF-κB. These results indicate that endothelial cell activation by CD99 ligation may lead to the up-regulation of adhesion molecule expression via NF-κB activation. However, pretreatment of endothelial cells with gingipains caused a dose-dependent reduction of adhesion molecule expression and leukocyte adhesion induced by ligation of CD99 on endothelial cells. The data provide evidence that the gingipains can reduce the functional expression of CD99 on endothelial cells, leading indirectly to the disruption of adhesion molecule expression and of leukocyte recruitment to inflammatory foci.
Related Links	http://dx.doi.org/10.1128/iai.74.3.1661-1672.2006
Ending Page	1672
Page Count	12
Starting Page	1661
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	3
Volume Number	74
Language	English
Publisher	American Society for Microbiology
Publisher Date	2006-03-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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