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Infect. Immun., Apr 1995, 1311-1317, Vol 63, No. 4
RP Darveau, MD Cunningham, T Bailey, C Seachord, K Ratcliffe, B Bainbridge, M Dietsch, RC Page and A Aruffo
Porphyromonas gingivalis, Pseudomonas aeruginosa, and Helicobacter pylori
have been shown to be associated with adult periodontal disease, chronic
lung infections, and peptic ulcers, respectively. The ability of these
bacteria to stimulate E-selectin expression and promote neutrophil
adhesion, two components necessary for the recruitment of leukocytes in
response to infection, was investigated. Little or no stimulation of
E-selectin expression was observed with either P. gingivalis or H. pylori
when whole cells, lipopolysaccharide (LPS), or cell wall preparations added
to human umbilical cord vein endothelial cells were examined. P. aeruginosa
was able to induce E-selectin to near-maximal levels; however, it required
approximately 100 to 1,000 times more whole cells or LPS than that required
by E. coli. Neutrophil- binding assays revealed that LPS and cell wall
preparations obtained from these bacteria did not promote endothelial cell
adhesiveness by E- selectin-independent mechanisms. In addition, P.
gingivalis LPS blocked E-selectin expression by LPS obtained from other
bacteria. We propose that lack of E-selectin stimulation and the inability
to promote endothelial cell adhesiveness are two additional indications of
low biologically reactive LPS. We suggest that this property of LPS may
contribute to host tissue colonization. In addition, the ability of P.
gingivalis to inhibit E-selectin expression may represent a new virulence
factor for this organism.
Copyright © 1995, American Society for Microbiology
Ability of bacteria associated with chronic inflammatory disease to stimulate E-selectin expression and promote neutrophil adhesion
Bristol-Myers Squibb Pharmaceutical Research Institute, Seattle, WA 98121.
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