journal article Aug 01, 1997

The expression of nonagglutinating fimbriae and its role inProteus mirabilisadherence to epithelial cells

Abstract
Proteus mirabilis is a common causative agent of human urinary tract infections, especially in catheterized patients and in those patients with structural abnormalities of the urinary tract. In addition to the production of hemolysin and urease, fimbriae-mediated adherence to uroepithelial cells and kidney epithelium may be essential for virulence of P. mirabilis. A single P. mirabilis strain is capable of expressing several morphologically distinct fimbrial species, which can each be favoured by specific in vitro growth conditions. The fimbrial species reported to date include mannose-resistant/Proteus-like fimbriae, ambient temperature fimbriae, P. mirabilis fimbriae, and nonagglutinating fimbriae (NAF). Here, using intact bacteria or purified NAF as immunogens, we have generated the first reported NAF-specific monoclonal antibodies (mAbs). Bacteria expressing NAF as their only fimbrial species adhered strongly to a number of cell lines in vitro, including uroepithelial cell lines. Binding of P. mirabilis was markedly reduced following preincubation with NAF-specific mAbs and Fab fragments. The presence of NAF with highly conserved N-terminal sequences on all P. mirabilis strains so far examined, combined with the ability of both anti-NAF mAbs and purified NAF molecules to inhibit P. mirabilis adherence in vitro, suggests that NAF may contribute to the pathogenesis of P. mirabilis.Key words: fimbriae, adherence, monoclonal antibodies, Proteus mirabilis, receptors.
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Published
Aug 01, 1997
Vol/Issue
43(8)
Pages
709-717
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Cite This Article
Douglas L. Tolson, Blair A. Harrison, Roger K. Latta, et al. (1997). The expression of nonagglutinating fimbriae and its role inProteus mirabilisadherence to epithelial cells. Canadian Journal of Microbiology, 43(8), 709-717. https://doi.org/10.1139/m97-102
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