Adhesins
Mostrando 25-36 de 497 artigos, teses e dissertações.
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25. Epithelial cell signaling responses to enterohemorrhagic Escherichia coli infection
Enterohemorrhagic Escherichia coli, including the serotype O157:H7 that is most commonly identified with human disease, cause both sporadic cases and outbreaks of non-bloody diarrhea and hemorrhagic colitis. In about 10% of infected subjects, the hemolytic uremic syndrome (hemolytic anemic, thrombocytopenia, and acute renal failure) develops, likely as a con
Memórias do Instituto Oswaldo Cruz. Publicado em: 2005-03
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26. Pathogenicity mechanisms of prokaryotic cells: an evolutionary view
The success of pathogenic microbes depends on their ability to colonize host tissues and to counter host defense mechanisms. Microorganisms can produce overwhelming infection because of their relatively short generation times, and because they have evolved powerful mechanisms for generating phenotypic diversity as an efficient strategy for adapting to rapidl
Brazilian Journal of Infectious Diseases. Publicado em: 2003-02
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27. Further biochemical characterization of Mycobacterium leprae laminin-binding proteins
It has been demonstrated that the alpha2 chain of laminin-2 present on the surface of Schwann cells is involved in the process of attachment of Mycobacterium leprae to these cells. Searching for M. leprae laminin-binding molecules, in a previous study we isolated and characterized the cationic proteins histone-like protein (Hlp) and ribosomal proteins S4 and
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-04
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28. Strategies by which some pathogenic trichomonads integrate diverse signals in the decision-making process
The interaction between each one of Trichomonas vaginalis and Tritrichomonas foetus with their hosts is a complex process in which components associated to the cell surfaces of both parasites and host epithelial cells, and also to soluble components found in vaginal/urethral secretions, are involved. Either cytoadhesion or the cytotoxicity exerted by parasit
Anais da Academia Brasileira de Ciências. Publicado em: 2000-06
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29. Influence of adhesins on the interaction of Escherichia coli with human phagocytes.
The fitness between bacterial adhesins and target cell receptors, determining bacterial adherence to epithelial cells in urinary tract infections, was shown to influence also the interaction with human polymorphonuclear leukocytes (PMNL). Two sets of homogenic strains, constructed to express either, both, or none of the globotetraosylceramide-sensitive (GS)
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30. Thin Pilus PilV Adhesins of Plasmid R64 Recognize Specific Structures of the Lipopolysaccharide Molecules of Recipient Cells
IncI1 plasmid R64 encodes a type IV pilus called a thin pilus, which includes PilV adhesins. Seven different sequences for the C-terminal segments of PilV adhesins can be produced by shufflon DNA rearrangement. The expression of the seven PilV adhesins determines the recipient specificity in liquid matings of plasmid R64. Salmonella enterica serovar Typhimur
American Society for Microbiology.
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31. Nonlethal adherence to human neutrophils mediated by Dr antigen-specific adhesins of Escherichia coli.
Uropathogenic Escherichia coli strains express a variety of adhesins, including members of the Dr adhesin family such as the Dr hemagglutinin, AFAI, and AFAIII. Certain E. coli adhesins (e.g., type 1 and S fimbriae) are known to mediate adherence to human polymorphonuclear leukocytes (PMNs). The receptor on erythrocytes for Dr family adhesins, decay accelera
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32. Piracy of adhesins: attachment of superinfecting pathogens to respiratory cilia by secreted adhesins of Bordetella pertussis.
Two proteins secreted by Bordetella pertussis are known to mediate adherence of these bacteria to mammalian respiratory cilia. When either ciliated cells or other pathogenic bacteria were pretreated with these adhesins, Streptococcus pneumoniae, Haemophilus influenzae, and Staphylococcus aureus acquired the ability to adhere to cilia in vitro and in vivo. Su
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33. Contribution of Adhesion to Bacterial Persistence in the Mouse Urinary Tract
The affinity of uropathogenic Escherichia coli to kidneys and bladders of experimentally infected mice was shown to be determined in part by the adhesive properties of the infecting bacteria. Mice were infected with various pairwise combinations of two homogeneic sets of bacteria: (i) mutants derived from a human pyelonephritis E. coli isolate which were sel
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34. dra-related X adhesins of gestational pyelonephritis-associated Escherichia coli recognize SCR-3 and SCR-4 domains of recombinant decay-accelerating factor.
Bacterial adhesins are important virulence factors that allow colonization of the human urogenital tract by Escherichia coli. Adhesins of the Dr family have been found to be more frequently expressed in strains associated with symptomatic urinary tract infections. Because of the high frequency of symptomatic urinary tract infections during pregnancy, we scre
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35. Capsule Shields the Function of Short Bacterial Adhesins
Bacterial surface structures such as capsules and adhesins are generally regarded as important virulence factors. Here we demonstrate that capsules block the function of the self-recognizing protein antigen 43 through physical shielding. The phenomenon is not restricted to Escherichia coli but can occur in other gram-negative bacteria. Likewise, we show that
American Society for Microbiology.
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36. Binding of Pili from Uropathogenic Escherichia coli to Membranes Secreted by Human Colonocytes and Enterocytes
PapG adhesins mediate the binding of uropathogenic Escherichia coli. Although receptors for these adhesins have not been demonstrated in intestinal epithelia, the colonic microflora includes strains of uropathogenic E. coli. We now report that surfactant-like particles secreted by the human intestine contain receptors for PapG adhesins and may provide an int
American Society for Microbiology.