scholarly journals Type 1 Fimbriae, a Colonization Factor of Uropathogenic Escherichia coli, Are Controlled by the Metabolic Sensor CRP-cAMP

2009 ◽  
Vol 5 (2) ◽  
pp. e1000303 ◽  
Author(s):  
Claudia M. Müller ◽  
Anna Åberg ◽  
Jurate Straseviçiene ◽  
Levente Emődy ◽  
Bernt Eric Uhlin ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Uropathogenic Escherichia Coli ◽  
Type 1 Fimbriae ◽  
Colonization Factor ◽  
Metabolic Sensor

scholarly journals Uropathogenic Escherichia coli P and Type 1 Fimbriae Act in Synergy in a Living Host to Facilitate Renal Colonization Leading to Nephron Obstruction

2011 ◽  
Vol 7 (2) ◽  
pp. e1001298 ◽  
Author(s):  
Keira Melican ◽  
Ruben M. Sandoval ◽  
Abdul Kader ◽  
Lina Josefsson ◽  
George A. Tanner ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Uropathogenic Escherichia Coli ◽  
Type 1 Fimbriae

Distribution of fimH Gene in Local Isolates of Adhesive Uropathogenic Escherichia coli

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
Omar Abdulkareem Ali ◽  
Ruqayah Qubtan Taha
Keyword(s):  
Escherichia Coli ◽  
Virulence Factors ◽  
Biofilm Formation ◽  
Uropathogenic Escherichia Coli ◽  
Adhesion Assay ◽  
E Coli ◽  
Type 1 Fimbriae ◽  
Formation Type ◽  
Uroepithelial Cells

Adhesion is an influential step for bacterial vigor in clinical micro-environments, type 1 fimbriae are essential virulence factors help uropathogenic E. coli in invasion and colonization of uroepithelial cells, the first step of UTIs and biofilm formation. Type 1 fimbriae of E. coli contain FimH protein at the tip encoding via fimH gene cluster, this study was conducted for determination the fimH gene distribution in uro-pathogenic E. coli isolated from UTIs patients. The results of adhesion assay show that (83.6%) of uropathogenic E. coli were high adherent isolates. While the results of E. coli fimH gene amplification prove that, of all E. coli isolates, the fimH gene was found in (87.1%), while among high adherent isolates it was found in (92.6%), and that Shows the function of type 1 fimbriae in the colonization and infection of urinary tracts in addition to other adhesions virulence agents of uropathogenic E. coli.

scholarly journals Role of the ceramide-signaling pathway in cytokine responses to P-fimbriated Escherichia coli.

1996 ◽  
Vol 183 (3) ◽  
pp. 1037-1044 ◽  
Author(s):  
M Hedlund ◽  
M Svensson ◽  
A Nilsson ◽  
R D Duan ◽  
C Svanborg
Keyword(s):  
Escherichia Coli ◽  
Signaling Pathway ◽  
Kinase Inhibitors ◽  
Human Kidney ◽  
Cytokine Response ◽  
Protein Kinase Inhibitors ◽  
E Coli ◽  
Type 1 Fimbriae ◽  
Outer Leaflet

Escherichia coli express fimbriae-associated adhesins through which they attach to mucosal cells and activate a cytokine response. The receptors for E. coli P fimbriae are the globoseries of glycosphingolipids; Gal alpha 1-->4Gal beta-containing oligosaccharides bound to ceramide in the outer leaflet of the lipid bilayer. The receptors for type 1 fimbriae are mannosylated glycoproteins rather than glycolipids. This study tested the hypothesis that P-fimbriated E. coli elicit a cytokine response through the release of ceramide in the receptor-bearing cell. We used the A498 human kidney cell line, which expressed functional receptors for P and type 1 fimbriae and secreted higher levels of interleukin (IL)-6 when exposed to the fimbriated strains than to isogenic nonfimbriated controls. P-fimbriated E. coli caused the release of ceramide and increased the phosphorylation of ceramide to ceramide 1-phosphate. The IL-6 response to P-fimbriated E. coli was reduced by inhibitors of serine/threonine kinases but not by other protein kinase inhibitors. In contrast, ceramide levels were not influenced by type 1-fimbriated E. coli, and the IL-6 response was insensitive to the serine/threonine kinase inhibitors. These results demonstrate that the ceramide-signaling pathway is activated by P-fimbriated E. coli, and that the receptor specificity of the P fimbriae influences this process. We propose that this activation pathway contributes to the cytokine induction by P-fimbriated E. coli in epithelial cells.

Type 1 Fimbriae of Escherichia coli

Fimbriae ◽  
2020 ◽  
pp. 9-26
Author(s):  
Per Klemm ◽  
Karen Angeliki Krogfelt
Keyword(s):  
Escherichia Coli ◽  
Type 1 Fimbriae
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