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

The structural basis for the cross-reactivity between the Escherichia coli K13, K20 and K23 capsular polysaccharides is the----)-beta-ribofuranosyl-(1----7)-beta-2-keto-3-deoxyoctonate polymer. Monoclonal antibodies against E. coli K13 which require O-acetyl-2-keto-3-deoxyoctonate for binding were further investigated. Such antibodies, of both the IgG and the IgM isotype, opsonized E. coli K13 in vitro and protected against intraperitoneal infection in mice as well as ascending pyelonephritis in rats. A monoclonal IgG1 anti-idiotype, specific for the K13 polysaccharide combining site of a protective IgM idiotype, primed for protection against intraperitoneal infection with live E. coli K13 following K13 injections at four as well as 12 weeks of age, the K13 polysaccharide alone did not immunize and protect. The monoclonal anti-K13 idiotype only primed for protection at four weeks of age. These findings suggest a strong effect of a single idiotype on the outcome of a bacterial infection.
Infection 1985
PMID:Studies on immunity against Escherichia coli K13 with monoclonal anti-K13 and anti-anti-K13. 390 58

In patients with recurrent pyelonephritis, the pathogenetic events proceed through intestinal colonization, spread to the urinary tract and persistence, seemingly uninterrupted by host defense mechanisms. The factors responsible for the deficient bacterial clearance from the kidneys of these patients, and the genetic control, have not been identified. The susceptibility to colonization has been linked to an increased receptivity for attaching bacteria of the uroepithelia, and to an overrepresentation of the P1 blood group phenotype. To evaluate the role of defects in host defense for the susceptibility to pyelonephritis, experimental UTI in mouse strains with known deficiencies was used. A highly significant increase in susceptibility was noted for C3H/HeJ compared to C3H/HeN mice. The bacterial recovery was inversely correlated to the mitogenic response to LPS. Back-cross analysis revealed a linkage of susceptibility to the Lpsd/Lpsd genotype. In contrast, T and B lymphocyte and complement (C5) defects had little effect on the clearance of Escherichia coli from the kidneys. It is concluded that the inflammatory mechanisms induced by LPS are essential for resistance to experimental pyelonephritis.
Infection 1985
PMID:Genetic factors in host resistance to urinary tract infection. 393 16

A new human gamma-globulin for intravenous use, SM-4300, was administered to 13 patients with infectious diseases. Five grams of SM-4300 was drip infused to each patient whose infection was not controlled by previous administered antibiotics. All of 13 patients had primary diseases besides infections. Thirteen patients were composed of 4 with pyelonephritis, 2 with pneumonia, 1 with bronchopneumonia, 1 with bronchitis, 1 with pyothorax, 2 with sepsis and 2 with cholecystitis. The results obtained were good in 3 cases, fair in 2 cases and poor in 7 cases. The results of a patient was not determined. No side effect was found including in laboratory findings.
 ...
PMID:[Clinical study on SM-4300 in the field of internal medicine]. 393 25

A comparative study was performed on haematogenous experimental pyelonephritis by injecting a Staphylococcus aureus suspension i.v. to homozygous and heterozygous Brattleboro and Wistar rats. The numbers of viable bacteria in blood, urine and kidney homogenates and the pathomorphological scores determined on the tenth day of infection were significantly lower in Brattleboro diabetes insipidus rats than in heterozygous Brattleboro and normal Wistar rats. The results suggest that homozygous Brattleboro rats are much more resistant to experimental pyelonephritis.
Infection
PMID:Comparison of the development of experimental pyelonephritis in homozygous brattleboro diabetes insipidus rats, heterozygous control rats and normal Wistar rats. 399 53

The chemotherapeutic properties of the new aminothiazolyl cephalosporin HR810 were investigated in experimental animals. Unlike other cephalosporins of the third generation, HR810 had good activity against Staphylococcus aureus as well as some activity against enterococci. In murine protection tests with these strains, it was clearly superior to ceftazidime, cefotaxime, ceftriaxone, cefoperazone and latamoxef. The compounds most effective in protecting mice from infections caused by Enterobacteriaceae were HR810 and ceftriaxone followed by ceftazidime, latamoxef and cefotaxime; cefoperazone was less active. HR810 was less active against Pseudomonas aeruginosa than ceftazidime but was considerably more effective than the other cephalosporins tested. HR810 also proved effective against localised infections such as thigh lesions, as well as against meningo-encephalitis in mice and pyelonephritis in rats. These results in laboratory animals make HR810 a promising candidate for clinical studies.
Infection
PMID:Chemotherapeutic properties of the new cephalosporin antibiotic HR810 in laboratory animals. 609 78

Most (greater than 90%) Escherichia coli strains isolated from children with acute non-obstructive pyelonephritis exhibit a specific type of filamentous protein appendage known as P-fimbriae. These fimbriae enable the bacterium to adhere to human uroepithelial cells by the specific recognition of and binding to a particular class of glycosphingolipids correlated to the human P-blood group antigens. In this paper a new method for the rapid and reliable identification of such P-fimbriated pyelonephritogenic bacteria is described. The method is based on particles to which the minimal glycoside receptor structure recognized by P-fimbriae is attached. Mixing these receptor-containing particles with P-fimbriated bacteria results in a strong and immediate agglutination reaction. The specificity and sensitivity of this new particle agglutination test proved to be superior to the haemagglutination assay previously used.
Infection 1982
PMID:Rapid identification of P-fimbriated Escherichia coli by a receptor-specific particle agglutination test. 612 18

There is extensive evidence indicating that the capacity of Escherichia coli to attach to the mucosal lining of the urinary tract is a virulence factor in acute pyelonephritis in the unobstructed state. In vitro results using human uroepithelial cells and clinical E. coli isolates as well as in vivo work on ascending urinary tract infection in mice and E. coli strains with genetically defined adhesins support this notion. The biochemical characterization of the bacterial ligands and epithelial cell receptors important for the attachment of most pyelonephritogenic E. coli provides a more sophisticated means of evaluating the role of bacterial adhesion in urinary tract infection: 1) It allows precise diagnosis of the receptor specificity of clinical isolates; 2) The receptor can be used to isolate the relevant bacterial adhesins; 3) The localization and quantity of the receptor in the patient may be of prognostic importance; 4) The administration of soluble receptor analogues or antibodies to the adhesins may be useful for prophylactic and/or therapeutic purposes.
Infection
PMID:Recent progress in the understanding of the role of bacterial adhesion in the pathogenesis of urinary tract infection. 612 98

More than 95% of acute non-obstructive pyelonephritis cases in children are caused by P-fimbriated Escherichia coli. Uroepithelial cells from individuals prone to urinary tract infections bind such bacteria more avidly than do cells from healthy controls. A high density of receptors for P-fimbriae on cells of the urinary tract and kidney may thus be an important host factor in the acquisition of upper urinary tract infections. In this communication we are describing methods to determine the densities and localization of P-fimbriae receptors on mammalian cells. To determine the receptor density on cells in suspension, the cells were incubated with fluorescein-labelled P-fimbriated E. coli. They were then subjected to fluorescence-activated cell sorting (FACS) analysis which monitors both the size and the relative fluorescence of each cell. FACS analysis proved versatile for rapid and specific analyses of P-fimbriae receptor densities on large numbers of any chosen type of cell. The fluorescein-labelled P-fimbriated E. coli were also useful in localizing P-fimbriae receptors in tissues. These techniques are not limited to the assessment of P-fimbriae receptor densities and tissue localization but open up new aspects for studies of the specificities involved in the interactions between other microorganisms (e. g. parasites, bacteria and virus) and their host cells.
Infection
PMID:Density and localization of P-fimbriae-specific receptors on mammalian cells: fluorescence-activated cell analysis. 613 82

A slide agglutination test to detect P-fimbriated Escherichia coli was developed by attaching glycosides containing the relevant receptor structure (alpha-D-Galp-(1-4)-beta-D-Galp) to particles. A suspension of these particles agglutinates within ten seconds when mixed with P-fimbriated bacteria. The test is named the P-specific particle agglutination test (PPA test). The PPA test is more sensitive than the haemagglutination assays previously used. The exclusive specificity of the PPA test also allows the detection of P-fimbriae on strains which additionally possess other fimbriae (e.g. X-fimbriae). Using this test, the frequency of P-fimbriated E. coli in children with acute non-obstructive pyelonephritis was shown to exceed 95%. In lower urinary tract infections the frequency of P-fimbriated E. coli was approximately 20%. Moreover, children with acute pyelonephritis were also found to be heavily colonized in both the periurethral area and the intestine with the identical P-fimbriated E. coli strain.
Infection
PMID:P-fimbriae of pyelonephritogenic Escherichia coli: detection in clinical material by a rapid receptor-specific agglutination test. 613 84

An experimental pyelonephritis model was developed in monkeys (Macaca fascicularis) using P-fimbriated Escherichia coli as the infecting organism. The relevant receptor molecules for P-fimbriae were also shown to be present in Macaca fascicularis. Atraumatic administration of P-fimbriated E. coli into the ureter induced a ureteritis followed by acute and chronic pyelonephritis. The decisive role of P-fimbriae as an adhesive virulence factor was proven by the receptor blockade of P-fimbriae-mediated bacterial adhesion by a synthetic receptor analogue (alpha-D-Galp-(1-4)-beta-D-Galp-1-OMe), which was administered into the ureter together with the challenge bacteria. On the basis of these and other findings, the role of reflux and pyelonephritis in relation to renal scarring is discussed in this paper. It is proposed that minor transitional vesicoureteral reflux together with the adhesive property of P-fimbriated E. coli and their ability to induce ureteritis might constitute an alternative mechanism to gross reflux by which bacteria ascend to the kidney. These findings and the fact that intestinal colonization with P-fimbriated E. coli coincides with the disease have opened up new prophylactic and therapeutic possibilities.
Infection
PMID:P-fimbriae of pyelonephritogenic Escherichia coli: significance for reflux and renal scarring-a hypothesis. 613 85


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