Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0022672 (acute tubular necrosis)
 2,175 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A total of 39 Holstein cattle were grazed in tracts of wild grassland on account of shortage in pasture grass. Twenty-nine cattle were affected and 26 of them died during a 21-day period. The main signs were depression, anorexia, ascites, and oliguria. There was elevated serum urea nitrogen and sugar and protein in the urine. Pathological examination revealed turbid swelling of the kidney, an increase in the amount of fluid in the body cavity, edema in the perirenal adipose tissue and hemorrhage in various visceral organs and tissues. Histologically, acute tubular necrosis in the kidney, hypoplasia of the erythroblast series in the bone marrow, atrophy and degeneration of the lymphatic tissue and focal necrosis of the liver were observed in many of the cattle. Among cows experimentally fed Narthecium asiaticum Maxim., Polygonum sachalinense Fr. Schum., and Vitis coignetiae Pulliat which were presumed to have been ingested in large amounts by grazing cattle in the field, the cows fed N. asiaticum revealed the clinical, biochemical and pathological changes similar to those noticed in naturally affected cattle. Cows fed P. sachalinense and V. coignetiae showed no distinct systemic symptoms except transient anorexia and hypothermia.
 ...
PMID:Narthecium asiaticum Maxim. Poisoning of grazing cattle: observations on spontaneous and experimental cases. 398 97

The biochemistry laboratory records of a 400-bed general hospital serving a population of about 120,000 showed that during the three-year period 1966-8 inclusive 487 patients had at some stage during their admission a blood urea of 100 mg/100 ml or more. Ninety per cent. were aged 50 or over, 79% were 60 or over, and 52% were 70 or over.The case notes of all patients with renal failure admitted during 1966 and 1967 were examined together with those of patients under 60 admitted during 1968. Three observers agreed about the most likely cause of the renal failure in 90% of patients whose case notes were available, or 74% of the total. The raised blood urea was thought to be due to "prerenal" factors in 60% of the patients, to acute tubular necrosis in 80%, to obstructive uropathy in 12%, and to "intrinsic" renal disease in 20%. Renal failure precipitated by such factors as cardiac failure, chest infections, cerebrovascular accidents, and shock was particularly common in old people.The hospital survey and replies to a questionnaire sent to all general practitioners in the area suggest that in the three-year period 14 patients may have been suitable for treatment by maintenance haemodialysis or renal transplantation. This represents a rate of about 39 per million per year under the age of 60 and 28 per million per year under 50.
 ...
PMID:Incidence of uraemia and requirements for maintenance haemodialysis. 521 79

The urine/plasma creatinine ratio (U/P Cr), the urine sodium concentration (UNa), and the diuretic response to mannitol infusion in 23 patients were reviewed in an attempt to differentiate functional renal failure (FRF) from acute tubular necrosis (ATN). FRF was diagnosed if the plasma urea nitrogen (PUN) or serum creatinine stabilized within 72 hours. When renal failure persisted longer, patients had ATN. Subjects dying within 72 hours were excluded. Ten patients had ATN and five survived. The minimum duration of renal failure among survivors was 10 days. None responded to mannitol. Of 13 patients with FRF, 11 survived. Seven of 12 who received mannitol responded with a diuresis. The mean UNa in the patients with ATN was 51.4 mEq./1. +/- 9.48 (SE). The mean U/P Cr was 11.2 +/- 1.12. In patients with FRF, the mean UNa was 14.0 mEq./1. +/- 4.2 and the mean U/P Cr was 42.5 +/- 11.5. A significant overlap was present between the two groups. When UNa was factored by the U/P Cr, the resultant ratio was significantly different for the two groups of patients (P < 0.01), and this proved to be a useful clinical index with which to distinguish FRF from established ATN.
 ...
PMID:Diagnostic indices in acute renal failure. 601 69

The activity of several enzymes with different intracellular sites was determined in urine at various times following nonfatal acute tubular necrosis induced by mercuric chloride administration. The excretion rate of all tested enzymes rose on the 1st and 2nd day; in the next observations (days 7-15) enzymatic values approached the basal values. The lactate dehydrogenase isoenzyme pattern of the renal cortical zone showed an early shift towards cathodic fractions and later (7 days) an increase of middle ones; the normal anodic zymogram recovered after a suitable time interval (30 days). The isoenzymatic changes are related both to the renal hypoxia and to the appearance of less differentiated cells. The behaviour of functional parameters (urine flow, osmolality, urea clearance, creatinine clearance) were well in agreement with the observed enzyme and renal isoenzyme changes.
 ...
PMID:Urinary enzyme excretion and renal lactate dehydrogenase isoenzyme pattern in acute HgCl2 nephropathy of rat. 612 4

The retrospective review of 115 case-histories of patients with acute renal failure (ARF) seen over the last two years showed that etiologies were distributed as follows: acute tubular necrosis in 65% of cases, urinary tract obstruction in 16%, acute glomerulonephritis in 3,5%, acute interstitial nephritis (AIN) in 8% and acute microvascular nephropathy in 3,5%. The diagnostic value of renal biopsy in ARF is discussed. In spite of recent advances in the treatment of ARF, the mortality rate remains as high as 48%. This is mainly due to current etiologic circumstances, to the age of the patients and to the complications of ARF, with infectious complications being the most serious. Urea nitrogen accumulation is not a poor prognosis factor. Furosemide in high doses does not alter the prognosis but reduces the total number of dialysis indications (81% in 1970, 60% in 1980), the number of dialysis sessions per patient (1 only in 62% of patients), and the duration of the ARF episode (mean duration: 10,7 days).
 ...
PMID:[Current aspects of acute renal failure]. 629 41

Sodium diethyldithiocarbamate (DDTC) administered following cis-diamminedichloroplatinum(II) (DDP) has been reported to attenuate structural renal damage and elevation of blood urea nitrogen in rats. Since DDP damages primarily proximal tubular epithelium in this species, we compared proximal tubular function, glomerular function, and histology in male Sprague-Dawley rats treated with DDP followed by either DDTC or 0.9% NaCl solution (NS) rescue. Male Sprague-Dawley rats received a single i.p. injection of DDP (7.5 mg/kg)-mannitol (75 mg/kg)-NaCl (67.5 mg/kg). Forty-five min later, rats were given i.p. injections of either DDTC (750 mg/kg) dissolved in 0.5 ml of NS (DDP + DDTC group; ten rats) or 0.5 ml NS (DDP + NS group; nine rats); additional rats received either DDTC only (DDTC group; six rats) or no treatment (untreated control group; six rats). All groups were sacrificed 5 days later by ether anesthesia and exsanguination. Compared to the untreated control group, the DDTC group had slightly lower mean blood urea nitrogen at sacrifice [12.5 +/- 0.5 (S.E.) versus 15.4 +/- 0.8 mg/dl; p less than 0.025 by unpaired Student's t test]; there was no difference in serum creatinine. The DDP + DDTC group had no diarrhea and no presacrifice deaths in contrast to diarrhea and three presacrifice deaths in the DDP + NS group. Blood urea nitrogen was also lower in the DDP + DDTC group at sacrifice (187 +/- 30 versus 383 +/- 39 mg/dl; p less than 0.005). However, weight loss and serum creatinine were not different. Structural acute tubular necrosis was marked in both DDP groups but was less severe in the DDP + DDTC group than in the DDP + NS group. Proximal tubular function was indexed by the uptake of the organic base N-[14C]methyl nicotinamide (NMN) and the organic acid p-aminohippurate in renal cortical slices incubated 90 min in Cross and Taggart medium. NMN uptake (expressed as slice to medium ratio) was slightly lower in the DDTC group than in untreated controls (4.1 +/- 0.2 versus 5.0 +/- 0.2; p less than 0.025). Marked depression of p-aminohippurate and NMN uptake occurred in both DDP + DDTC and DDP + NS groups. There was no difference in NMN uptake, but depression of p-aminohippurate uptake was slightly less severe in the DDP + DDTC group (5.3 +/- 0.7 versus 3.1 +/- 0.3; p less than 0.005). We conclude that DDTC rescue attenuates structural DDP injury in this animal model. DDP-mediated proximal tubular dysfunction was only marginally attenuated by DDTC; glomerular filtration rate, as indexed by serum creatinine, was not protected. DDTC attenuation of DDP toxicity may be mediated in part via reducing volume depletion due to DDP-associated diarrhea.
 ...
PMID:cis-diamminedichloroplatinum(II) nephrotoxicity: tubular function after rescue with sodium diethyldithiocarbamate in rats. 630 93

A study was conducted in oliguric and acutely azotemic patients, measuring: (i) the fractional excretion of sodium (FENa) using creatinine clearance as a measure of glomerular filtration rate, and (ii) sodium clearance relative to urea clearance, designated as the sodium/urea clearance ratio (Na:urea CR). It was found that FENa discriminated between "tubular" and "non-tubular" disorders in 96% of patients. Further, Na:urea CR was as discriminating as FENa. Patients with Na:urea CR above 2.5% can be reliably diagnosed as having acute tubular necrosis or acute urinary tract obstruction; those with a value less than 2.5% will have acute glomerulonephritis or pre-renal azotemia. As urea and sodium measurements are so readily available, this test can now be applied in the assessment of the oliguric or acutely azotemic patient in any hospital practice.
 ...
PMID:A simple aid to the differential diagnosis of oliguria. 658 51

Immunological events in the acute, recovery and convalescent stages of typhoid fever were correlated with the occurrence of renal disease in 24 consecutively selected patients. Serum complement levels (C3) were significantly reduced in patients with renal disease during the acute state (p less than 0.01) and increased to normal levels in the recovery phase. IgG and IgM immunoglobulin levels were significantly lower than control values in all three stages (p less than 0.05). While IgA levels were elevated to above control levels in patients with and without renal disease in all three stages, IgA levels were lower in patients with renal disease compared to those without renal involvement in the acute stage (p less than 0.025). The percentage of T cells was increased significantly in all three stages (p less than 0.01). Seven patients showed renal abnormalities. All of them had glomerular disease demonstrated by proteinuria of 1.0 g or greater per 24 h, associated with significant haematuria. Almost all of these patients were glucose-six-phosphate-dehydrogenase (G.6.P.D.) deficient. Serum blood urea nitrogen was elevated in five of these patients who were G.6.P.D. deficient, and two of them developed classical acute tubular necrosis. It appears that renal involvement in typhoid fever commonly occurs as transient glomerular or tubular disease in G.6.P.D. deficient individuals. Glomerular disease is associated with a decrease in serum complement (C3) level in acute stage.
 ...
PMID:Immunological and clinical aspects of kidney disease in endemic typhoid fever in Iran. 660 45

One of the controversies in the nutritional therapy of patients with renal failure is the respective role of either the essential amino acids alone or both essential and nonessential amino acids in the treatment of these patients. During a period when essential amino acids were unavailable, a large number of patients with acute renal failure was treated with a modified solution consisting of both essential and nonessential amino acids. The solution consisted of 3.8 grams of nitrogen in 46 per cent dextrose in units of 750 milliliters. A mean of 2,322 +/- 151 calories was administered to this group of patients. Over-all, the survival rate was 9 per cent as opposed to 75 per cent in the previous group treated with essential amino acids only and hypertonic dextrose, 40 per cent, in the group of historical controls treated with hypertonic dextrose. The groups are not strictly comparable because the group treated with both essential and nonessential amino acids may not have been strictly comparable, particularly with a slightly longer duration of renal failure, higher initial blood urea nitrogen level and lower urine volume than either of the other two groups previously treated. While adequate stabilization, but not a decrease in the blood urea nitrogen level, may be achieved from the use of both essential and nonessential amino acids, the excessive mortality seen may be related to differential effects of essential amino acids in supporting host resistance, while nonessential amino acids do not. The results of this study suggest that, until the safety and efficacy of a mixture of essential and nonessential amino acids in renal failure can be demonstrated, essential amino acids remain the treatment of choice as the nutritional support of patients with acute tubular necrosis.
 ...
PMID:Comparative study of parenteral nutrition in renal failure using essential and nonessential amino acid containing solutions. 677 42

Groups of ten male rats were treated with a high challenge dose of cephaloridine (CPH, 3750 mg kg-1), with methylprednisolone (MP, 100 mg kg-1) or with cephaloridine and methylprednisolone (CPH + MP) by single subcutaneous injection. A control group received the injection vehicles only. Urine was collected from all animals daily over 18-h collection periods, up to 96 h after treatment. Blood was collected at 24, 48, 72 and 96 h after treatment. At necropsy, kidneys were weighed, processed and examined histopathologically. Results show that methylprednisolone significantly ameliorated the nephrotoxicity of the challenge dose of cephaloridine. CPH-only treated rats had severe toxic nephrosis characterised by acute tubular necrosis, and elevated blood urea and creatinine. By contrast, the majority of CPH + MP treated rats had only a slight or moderate toxic nephrosis, and had lower blood urea and creatinine levels compared with rats treated with CPH only, indicating preservation of kidney function. Interestingly, rats treated with CPH + MP had higher urinary enzymes (alkaline phosphatase, lactate dehydrogenase, gamma glutamyltransferase and N-acetyl-beta-glucosaminidase) as well as protein and glucose, compared with rats treated with CPH only. This is taken to indicate that rats treated with CPH only had such marked kidney damage and necrosis that the population of cells able to produce these marker enzymes was significantly and rapidly depleted, but the protection afforded by methylprednisolone allowed CPH + MP treated rats to sustain urinary enzyme output. Effects on urinary glucose and other parameters such as body weight and kidney weight demonstrate interactions between glucocorticoid pharmacology and cephaloridine nephrotoxicity.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Glucocorticoid amelioration of nephrotoxicity: a study of cephaloridine-methylprednisolone interaction in the rat. 757 15


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>