Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0033687 (proteinuria)
 24,015 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The quantity of urinary proteins and their molecular weight composition was analyzed in different experimental glomerulopathies using the SDS-PAA-electrophoresis. Masugi nephritis, heterologous and autologous immune complex nephritis as well as D-penicillamine induced glomerulonephritis were studied in rabbits, guinea pigs and rats. The procedure allows (1) to distinguish physiological from low grade glomerular proteinuria by their respective characteristic patterns in early disease stages (2) to follow up the disease course of individual animals without sacrifice and (3) to discriminate species specificity of physiological urinary proteins. It is recommended to use this technique of urinary protein analysis in experimental conditions, where mild glomerular damage is expected.
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PMID:Molecular weight analysis of proteinuria in experimental glomerulopathies. 13 32

The authors present a variant of the technique of sodium dodecylsulfate acrylamide gel electrophoresis (SDS-PAA) reported by Weber and Osborn, for the analysis of urinary proteins. SDS-PAA separates the proteins chiefly according to their molecular radius. SDS-PAA, as compared to acetate cellulose electrophoresis and immunoelectrophoresis, gives better resolution and may be recommended for the investigation of proteinuria.
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PMID:[Application of polyacrylamide gel electrophoresis-SDS to the study of proteinuria (author's transl)]. 68 17

The urinary protein pattern following tubular damage is different from other proteinurias. The tubular proteinuria consists of micromolecular proteins of MW 10-70000. The disturbed tubular function probably leads to a diminished reabsorption of these microproteins from the tubular fluids. By determining the molecular weight of the urinary proteins by SDS-PAA-electrophoresis tubular proteinurias may be distinguished from glomerular and extrarenal forms. Tubular proteinurias are found in inflammatory, degenerative and vascular tubulopathies. The course of acute tubular diseases reveals proteinurias of different micromolecular composition depending of the improving tubular function; this supports the concept of a selective tubular reabsorption of microproteins. Tubular proteinurias are associated with normal as well as with impaired glomerular filtration, which, in part, might influence the amount of microproteins excreted.
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PMID:[Discelectrophoretic analysis of the tubular proteinuria (author's transl)]. 110 95

Molecular weight analyses of urinary proteins in 34 patients following cadaveric kidney transplantation were performed by SDS-PAA-electrophoresis in order to diagnose transplant complications. A micromolecular 'tubular' proteinuria (mw 70-10,000) was found in all post-operative urines. Later on during clinically normal periods the patients exhibited an unphysiological proteinuria of mw 70-40,000. Recurrence of tubular proteinuria was associated with rejection episodes and acute kidney failure. Twelve patients developed a macromolecular glomerular proteinuria (mw greater than 60,000), caused by recurrent glomerulonephritis, glomerular rejection disease or renal vein thrombosis. Steroid treatment reduced the glomerular permeability for macromolecules above mw 65,000.
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PMID:Proteinuria as diagnostic marker after human kidney transplantation. 110 54

The SDS polyacrylamide gelelectrophoresis (SDS-PAA) as used in this study has proven to be an excellent tool to differentiate urinary proteins qualitatively and quantitatively, since the proteins are differentiated exclusively according to their molecular radius. Selectivity was estimated by the ratio transferrin:IgG. Some of the proteins were identified by specific antisera. For clinical use SDS-PAA may distinguish: chronic glomerulonephritis from chronic pyelonephritis; the different diabetic nephropathies; some cases of minimal change nephritis from proliferative and degenerative glomerular diseases; the uncomplicated posttransplantation course from (interstitial) rejection crises and from glomerular diseases (recurrent GN, glomerular rejection disease), and the persisting small glomerular proteinuria after acute glomerulonephritis from proteinurias becoming physiological.
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PMID:Discelectrophoretic molecualr weight analysis of urinary proteins. A contribution to the clinical diagnostic differentiation and the pathophysiology of proteinuria. 123 87

The quantitative and qualitative analysis of proteinuria by electrophoretic means proved to be a potent diagnostic tool for differentiation of functional renal impairment. The purpose of this study was to compare the macro scale SDS-PAGE technique, which has been used for the last two decades, with semiautomated electrophoresis using an ultrathin SDS-PAA gel with silver staining (Phast system). The new system proved to be quick and easy to handle. Separation of proteins in the range of 70-320 kD were of comparable quality to the macro scale system (unselective and selective glomerular proteinurias with 68 to 150 and 68 to 350 kD components, respectively, as well as total serum proteins), but there was considerable improvement regarding the quality and visibility of protein bands in the range of 11-70 kD. This improvement led to a new classification of micromolecular protein bands into three groups: the smallest microproteins (11-22 kD), the larger microproteins (23-40 kD) and the largest microproteins (41-68 kD). Thereby it was possible to obtain an improved definition of electrophoretic patterns of urinary proteins, which is described in detail.
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PMID:Improved classification of proteinuria by semiautomated ultrathin SDS polyacrylamide gel electrophoresis. 169 54

Protein excretion and protein fractions either according to their molecular mass or with immunological techniques were studied in the spontaneous morning urine of 17 primate species. The total protein concentration in most of the species ranges between 0.01 and 0.2 mg/ml. The pronounced proteinuria (4 mg/ml) in some south american species (Callithricidae) seems to be remarkable. By using immunoprecipitation (LC-Partigen plates), albumin could be detected in most species, alpha 1-microglobulin in some, and transferrin in few of the species. After electrophoretic separation on pre-cast 1D-micro- SDS-PAA gradient gels (8-25%, semi-automatic Phast-System) followed by CBB R-350 or silver stain respectively, in most species a protein pattern similar to human urine could be observed. As our results show, urine analysis is a suitable tool for noninvasive investigations in primates.
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PMID:[Urine proteins in primates]. 247 7

A retrospective study of urinary protein patterns, as determined by SDS-PAA-disc-electrophoresis was performed in 107 patients in third trimester of pregnancy because of preeclampsia. The aim was to determine whether the protein patterns allow a differentiation between nephropathies associated with genuine toxaemia of pregnancy and those in which toxaemia was superimposed on preexisting renal glomerular or tubular disease. The magnitude and type of proteinuria was related to the mean arterial pressure (MAP). 47% of all patients showed a mixed protein pattern independent of the MAP-severity. This form of proteinuria is probably associated with a genuine toxaemia of pregnancy. It was not possible to determine if pure glomerulopathies whose frequency rose with MAP, had already been present before pregnancy. In a third of the 22 patients followed-up post-partum pathological protein patterns or increased protein excretion was detected. This implies that 35% of the nephropathies were present before pregnancy. However, differentiation between preexisting and toxaemia associated nephropathy was not always possible. SDS-PAA-analysis of urinary protein should be carried out in earlier stages of pregnancy in cases of increasing MAP and proteinuria.
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PMID:Urinary protein patterns and preeclampsia. 687 74

Proteinuria in preeclamptic women was qualitatively differentiated and in cases of pure glomerular proteinuria three groups according to the low-, medium- or high selectivity of glomerular proteinuria were formed. In these patients the incidence of liver dysfunction and severe proteinuria together with an increase in mean arterial blood pressure was investigated. The aim of this study was to find out if there is any connection between glomerular proteinuria of different selectivity and disturbed liver function. In patients with EPH-gestosis a pure glomerular proteinuria in SDS-PAA-disc electrophoresis of the urine was found. Together with the increase in glomerular selectivity an increase in quantitative urinary protein loss was found. In patients with high selective glomerular proteinuria the extent of proteinuria was about three times higher than in patients with low selectivity. In all patients a moderate elevation of the liver enzymes was found. In all patients disturbed liver function returned to normal within a few days after delivery. We conclude from these data that glomerular functional lesions pregnancy in patients with preexisting glomerulopathies or pregnancy induced renal dysfunction are accompanied in a high rate by moderate disorders of liver function.
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PMID:[Selectivity of glomerular proteinuria and liver function in gestosis]. 804 89

The present study was designed to evaluate the urinary albumin excretion in 62 patients with essential hypertension. None of them had prior proteinuria or history of nephropathy or uropathy. Patient data, blood pressure, proteinuria using Bradford's method, albuminuria by radial immunodiffusion, urinary SDS-PAA electrophoresis, plasma glucose, serum creatinine, serum cholesterol were determined. The urinary albumin excretion was significantly higher (p < 0.001) in the group of hypertensive patients (19.22 +/- 2.36 micrograms/min) compared to a group of 20 control subjects (4.17 +/- 0.67 microgram/min). Compared to a subgroup of hypertensive patients without ischemic heart disease (12.07 +/- 1.30 micrograms/min) microalbuminuria was higher (43.74 +/- +/- 5.74 micrograms/min; p < 0.001) in a subgroup of 14 patients with essential hypertension and ischemic heart disease with severe coronary events: unstable angina pectoris (9 patients), myocardial reinfarction (2 patients), ventricular arrhythmias (3 patients). A positive correlation between the microalbuminuria and the duration of hypertension was found (r = 0.64; p < 0.001). Therefore, microalbuminuria may represent a marker of the severity of vascular involvement in hypertensive patients.
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PMID:Microalbuminuria in hypertensive patients. 808 6


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