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Query: UMLS:C0034186 (pyelonephritis)
 6,144 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The Escherichia coli P fimbriae F71, F72, F9, and F11 from four cloned strains were purified, and polyclonal antisera were raised in rabbits. Cross-reactions of these antisera with eight different cloned and purified fimbriae were measured in an enzyme-linked immunosorbent assay. These antisera showed a reaction with the homologous fimbriae and also with most heterologous fimbriae. Monoclonal antibodies (MAbs) directed against the same four native fimbriae were produced by the fusion of spleen cells from immunized BALB/c mice with SP2/0 myeloma cells. The resulting four series of MAbs were also screened in an enzyme-linked immunosorbent assay with eight different cloned and purified fimbriae. Four different F71 hybridomas produced MAbs which recognized only epitopes on F71 fimbriae. Two F72 MAbs recognized epitopes on F72 and F9 fimbriae, whereas another F72 MAb recognized an epitope on only F72 fimbriae. Three MAbs raised against F9 reacted only with epitopes on F9 fimbriae. Six MAbs against F11 fimbriae could be divided into two groups: on the one hand two MAbs recognizing F11, pyelonephritis-associated pilus, Pap, and F72 fimbriae and on the other hand four MAbs recognizing F11 and "Clegg" fimbriae. None of the MAbs reacted with 1A or 1C fimbriae. In a hemagglutination inhibition assay it was shown that none of the MAbs produced inhibited the adhesive properties of homologous cloned strains.
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PMID:Monoclonal antibodies that recognize the P fimbriae F71, F72, F9, and F11 from uropathogenic Escherichia coli. 241 58

O:K:H serotype determination of 267 E. coli strains from patients with pyelonephritis or cystitis led us to tentatively consider some O:K:H types, e.g. O6:K2:H1 as pyelonephritis and e.g. O6:K13:H1 as cystitis associated types. By means of crossed immunoelectrophoresis (CIE) several strains of such special O:K:H serotypes were examined for presence of the previously described fimbrial antigens, F7 and F8. Three new F antigens were designated F10, F11 and F12. The fimbrial structures of these antigens were demonstrated by immunoelectron microscopy (IEM). Based on the haemagglutinating (HA) capacity of the strains it was possible to separate differently fimbriated organisms of the same strain. The bacteria which agglutinate human erythrocytes could be absorbed out of the mixture when the erythrocytes were removed by sedimentation. When the bacteria in the supernatant no longer agglutinated human erythrocytes they were regarded as HA absorbed and were compared with non-HA absorbed bacteria for their ability to attach to epithelial cells from the urinary tract. Hence, it was concluded that F7, F8 and F10 caused haemagglutination and were responsible for the attachment to urinary epithelial cells, while the fimbriae antigenically termed pseudotype 1 did not induce haemagglutination and played little or no role for the attachment to this kind of epithelial cells.
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PMID:O, K, H and fimbrial antigens in Escherichia coli serotypes associated with pyelonephritis and cystitis. 612

Uropathogenic Escherichia coli (UPEC) strains are responsible for the majority of uncomplicated urinary tract infections, which can present clinically as cystitis or pyelonephritis. UPEC strain CFT073, isolated from the blood of a patient with acute pyelonephritis, was most cytotoxic and most virulent in mice among our strain collection. Based on the genome sequence of CFT073, microarrays were utilized in comparative genomic hybridization (CGH) analysis of a panel of uropathogenic and fecal/commensal E. coli isolates. Genomic DNA from seven UPEC (three pyelonephritis and four cystitis) isolates and three fecal/commensal strains, including K-12 MG1655, was hybridized to the CFT073 microarray. The CFT073 genome contains 5,379 genes; CGH analysis revealed that 2,820 (52.4%) of these genes were common to all 11 E. coli strains, yet only 173 UPEC-specific genes were found by CGH to be present in all UPEC strains but in none of the fecal/commensal strains. When the sequences of three additional sequenced UPEC strains (UTI89, 536, and F11) and a commensal strain (HS) were added to the analysis, 131 genes present in all UPEC strains but in no fecal/commensal strains were identified. Seven previously unrecognized genomic islands (>30 kb) were delineated by CGH in addition to the three known pathogenicity islands. These genomic islands comprise 672 kb of the 5,231-kb (12.8%) genome, demonstrating the importance of horizontal transfer for UPEC and the mosaic structure of the genome. UPEC strains contain a greater number of iron acquisition systems than do fecal/commensal strains, which is reflective of the adaptation to the iron-limiting urinary tract environment. Each strain displayed distinct differences in the number and type of known virulence factors. The large number of hypothetical genes in the CFT073 genome, especially those shown to be UPEC specific, strongly suggests that many urovirulence factors remain uncharacterized.
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PMID:Defining genomic islands and uropathogen-specific genes in uropathogenic Escherichia coli. 1735 Oct 47