Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0034186 (pyelonephritis)
 6,144 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The value of assaying urinary alanine aminopeptidase activity was examined. The activity of normal urine was below 2 IU/1. High urinary alanine aminopeptidase was found to suggest the presence of nephritis, pyelonephritis, or other nephrotoxic processes.
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PMID:Urinary alanine aminopeptidase activity in various urinary tract diseases. 615 8

Immunopathologic responses to urinary Tamm-Horsfall protein in the development of chronic pyelonephritis were examined by four different approaches. First, in a rabbit model, tubulointerstitial nephritis developed in 64 of 102 rabbits injected intravenously with urine or rabbit Tamm-Horsfall protein as compared with only one of 17 rabbits in two control groups. Circulating cytotoxic lymphocytes plus immunoglobulin G (IgG) antibodies against Tamm-Horsfall protein were found in 51 percent of challenged (urine or Tamm-Horsfall protein) rabbits with tubulointerstitial nephritis as compared with only 8 percent of those without it (p less than 0.001). Second, in a porcine model of reflux nephropathy, 16 of 21 pigs with pyelographic findings indicative of reflux had elevated serum titers of anti-Tamm-Horsfall protein antibody as compared with 0 of 13 with normal pyelograms. Five of 10 refluxing pigs tested also had circulating lymphocytes that were cytotoxic in the presence of Tamm-Horsfall protein as compared with 0 of 13 with normal pyelograms. Third, in human studies, 12 of 49 patients with recurrent nephrolithiasis demonstrated abnormal elevations in anti-Tamm-Horsfall protein antibody; 13 of 49 had an abnormality in one of two assays of cell-mediated immunity to Tamm-Horsfall protein as compared with 0 of the normal control subjects. These abnormalities were not associated with overt obstruction or bacteriuria, but appeared to be more common in patients with recent onset and active recurrent nephrolithiasis. Lastly, an inhibitor of the binding reaction between human Tamm-Horsfall protein and its IgG antibody was detected in extracts of three uropathic coliforms. The inhibitors were partially purified by chromatographic means. Preliminary immunoautoradiographic studies revealed three or less protein-containing subunits of Escherichia coli that cross-reacted with anti-Tamm-Horsfall protein antibody. These studies suggest that autoimmune responses to Tamm-Horsfall protein may occur after exposure to Tamm-Horsfall protein by intravenous challenge, urinary reflux, or recurrent nephrolithiasis. This autoimmune response to Tamm-Horsfall protein may be the pathogenetic mechanism by which these factors, including bacteriuria, contribute to chronic pyelonephritis.
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PMID:Immunopathogenesis of chronic pyelonephritis. 619 15

In renal allograft monitoring we performed daily urine cytology (UC) (n = 773) and fine needle aspiration cytology (FNAC) (n = 144) two to three times weekly in 29 allograft recipients with 18 acute rejection episodes. UC is more accurate in diagnosis and therapeutic control of acute rejection episodes. In addition UC is better than FNAC in revealing non-rejection causes of graft dysfunction such as interstitial nephritis (pyelonephritis, allergic nephritis), the presence of bacteria, fungi and virus inclusion bearing cells in the sediment and nephrotoxic tubular damage.
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PMID:Comparison of urine cytology versus fine needle aspiration cytology in monitoring renal allograft dysfunction. 634 50

Computer tomography of the kidneys was performed on 30 patients with acute renal infections (acute suppurative pyelonephritis, acute renal abscess, infected cyst, pyelonephrosis, calculus perforation, retroperitoneal abscess). Computer tomography provided more accurate information concerning the extent of the renal and extra-renal inflammatory process than did the urogram or sonogram. This may significantly affect the choice of treatment, particularly concerning the use of drugs or of surgery. Angiography and retrograde pyelography may be used in selected cases, especially where there is a suspicion of acute bacterial nephritis, renal vein thrombosis or ureteric obstruction.
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PMID:[Computer tomography in acute pyelonephritis]. 640 27

Although the role of bacterial infection as the major determinant in the development of acute pyelonephritis has been well documented for years, the nature of the renal scarring typical of chronic "atrophic" pyelonephritis has been a matter of controversy for at least three decades. In the past, recurrent bacterial infection of the kidney was thought to be responsible for the pathologic entity of "chronic pyelonephritis." However, more recent studies suggest that recurrent bacteriuria, in the absence of some form of obstructive uropathy, rarely produces chronic pyelonephritis. The close association between vesicoureteral reflex and chronic pyelonephritis has also been firmly established and has been observed to occur frequently in the absence of urinary tract infection. However, the mechanism by which vesicoureteral reflux injures the kidney has not been firmly established. A number of observations have suggested that some normal component of urine, particularly Tamm-Horsfall protein, might serve as an antigenic determinant involved in the immunopathogenesis of renal scarring in vesicoureteral reflux. The present studies were designed to investigate the immunopathogenic role of Tamm-Horsfall protein in a rabbit model of tubulointerstitial nephritis, and in a swine model of reflux nephropathy. The immune responses to Tamm-Horsfall protein in patients with recurrent nephrolithiasis were also examined, as were the antigenic similarities between Tamm-Horsfall protein and protein-containing components of uropathic bacteria. The results of these studies indicate that autoimmune responses to Tamm-Horsfall protein may occur after exposure to Tamm-Horsfall protein by intravenous challenge in rabbits, and by urinary reflux in pigs, as well as in recurrent nephrolithiasis in man.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Autoimmune responses to Tamm-Horsfall protein in the pathogenesis of chronic pyelonephritis. 654 94

Thirty patients with focal renal masses were evaluated on a .12-Tesla resistive magnetic resonance unit using partial saturation and spin echo pulse sequences. A short repetition time (TR = 143 ms) was employed for partial saturation images and a spin echo was present in each case (TE = 10 ms). Additional pulse sequences through regions of interest were also obtained. Fifteen patients had cystic lesions, nine patients had renal cell carcinoma, two had metastatic lesions, one had an angiomyolipoma, and three had focal bacterial infection. Cystic lesions were well circumscribed and demonstrated a range of signal intensities. Small intra-parenchymal cysts were difficult to identify. Renal cell carcinomas demonstrated areas of increased signal using a partial saturation sequence (TR = 143-415 ms, TE = 10 ms). Magnetic resonance imaging accurately detected perinephric extension and vascular invasion in all patients. Metastatic disease to the kidney was uniformly low in signal, in contrast to primary renal cell carcinoma; an angiomyolipoma demonstrated very high signal intensity. Two masses resulting from acute focal bacterial nephritis were uniformly low in signal. One additional case of a more indolent pyelonephritis demonstrated high signal in regions of replacement lipomatosis and low signal in sites of active infection. Magnetic resonance imaging appears to be an accurate way of detecting, identifying, and staging focal renal masses.
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PMID:Focal renal masses: magnetic resonance imaging. 673 18

The participation of cell-mediated mechanisms in renal disease is reviewed. Experimental studies demonstrate that delayed-type hypersensitivity reactions can be elicited in the renal interstitium or in the glomerulus and produce lesions characterized by an influx of mononuclear cells and tissue damage. Methods for the analysis of cell-mediated reactions in tissue sections, especially those using monoclonal antibodies, are reviewed, and the possible role of cell-mediated mechanisms in human renal diseases is assessed. It seems probable that cell-mediated mechanisms are involved in the pathogenesis of certain forms of tubulointerstitial and glomerular disease, in particular, drug-induced acute interstitial nephritis, pyelonephritis, anti-GBM nephritis, and certain forms of acute glomerulonephritis. Conclusive evidence awaits, however, the development of techniques that permit identification of cell-mediated reactions in vivo.
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PMID:Cell-mediated mechanisms in renal diseases. 675 Feb 11

Clinical, paraclinical, and morphological investigations were carried out with a total of 12 cattle (9 calves and 3 cows) with an induced suppurative surgical infection caused by two strains of Corynebacterium pyogenes. It was established that such an experimental infection in cattle clinically ran a chronic course, involving predominantly the urinary and the digestive system as well as the joints. Morphologically, the infection was manifested as a chronic septicopyemia, with purulent nephritis and pyelonephritis, cystitis, splenitis, hepatitis, valvular meningoencephalitis, and absceses in various tissues and organs.
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PMID:[Clinical aspects and pathomorphology of Corynebacterium infection in cattle]. 676 May 30

Fifty-one patients with acute inflammatory renal disease were examined with ultrasound. The spectrum of findings seen in acute pyelonephritis is described, with emphasis on the evolution of the disease from acute focal inflammation to perinephric extension. There were 26 cases of acute bacterial nephritis, 15 cases of abscess formation, and 10 cases of pyohydronephrosis. Pathologic correlation was obtained. The impact of percutaneous needle puncture on the diagnosis and treatment of all stages of renal disease is discussed. Prompt diagnosis can be made, and specific antibiotic therapy can be instituted on the basis of information obtained by ultrasound examination and percutaneous aspiration. If necessary, treatment may be aided by ultrasonically guided placement of drainage catheters. Serial examination will show resolution of the disease, and it avoids exposure of the patient to ionizing radiation and intravenous contrast agents.
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PMID:Interventional ultrasound in detection and treatment of renal inflammatory disease. 683 33

A method of radioimmunologic quantitation of antibodies to streptococcal antigen separated from the cell wall extract of group A type T12 strain has been developed. The highest values of radioactive antigen binding were observed in acute glomerulonephritis (75%), as compared to chronic glomerulonephritis in which values of 25% to 56% were found depending on the morphology of renal changes. It was shown that none of the patients with pyelonephritis, Alport's syndrome, lupoid nephritis and polycystic renal disease had elevated antistreptococcal antibody levels. In contrast to this, all patients with tonsillitis and proteinuria exhibited increased titre of this antibody. It was shown that the antigen is related neither to M-protein nor to group A polysaccharide and that it is not type-specific because the binding of antigen T12 may be inhibited by the antigen produced from strain T5. Although the antigen is not type-specific, some differences in the response to antigens prepared from various types of streptococci in patients with different forms of chronic glomerulonephritis are observed.
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PMID:Use of radioimmunoassay for the detection of circulating antistreptococcal antibody in patients with glomerulonephritis. 703 91


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