Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:2.6.1.1 (aspartate aminotransferase)
 21,665 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Humans are exposed to a number of toxic elements in the environment; however, most experiments with laboratory animals investigate only one toxic element. To determine if concomitant exposure to lead (Pb), cadmium (Cd), and/or arsenic (As) modified the changes produced by any one metal in various parameters of toxicity, 168 male, Sprague-Dawley, young adult rats were fed nutritionally adequate diets to which had been added 0 or 200 ppm Pb as Pb acetate, or 50 ppm Cd as Cd chloride, or 50 ppm As as sodium arsenate or arsanilic acid in a factorial design for a period of 10 weeks. At these concentrations, Cd and As reduced weight gain even when differences in food intake were taken into account; administration of both Cd and As depressed weight gain more than did either metal alone. Pb did not adversely affect food consumption or weight gain. Increased numbers of red blood cells (RBCs) were observed following administration of Pb, Cd, or As; usually more cells were observed when two or three metals were administered, compared to individual metals. Despite increasing numbers of circulating RBCs, hemoglobin and hematocrit were reduced, especially with the Pb-Cd combination and the Cd-arsanilic acid combination. Specific effects of Pb on heme synthesis were observed, including increased urinary excretion of delta-aminolevulinic acid; this increase was reduced by the presence of dietary cadmium. Analyses of blood showed values for the laboratory rat within normal ranges for blood urea nitrogen, creatinine, cholesterol, calcium, albumin, total protein, and bilirubin. Uric acid was increased by Pb, with little modification by dietary Cd or As content. Serum glutamate-oxalate transaminase activity was reduced by As. Serum alkaline phosphatase was greatly reduced by either As or Cd but not Pb. Combinations of As and Cd did not further reduce the activity of this enzyme. Kidney weight and kidney weight/body weight ratios were increased by Pb alone, with no effects of Cd or As alone or as interactions. Liver weight/body weight ratios were reduced in animals fed 50 ppm dietary Cd. Kidney histology shows predominantly Pb effects, namely, intranuclear inclusion bodies and cloudy swelling. Ultrastructural evaluation of kidneys from Pb-treated animals disclosed nuclear inclusion bodies of the usual morphology and mitochondrial swelling. Concurrent administration of Cd greatly minimized Pb effects on the kidney under conditions of this experiment. Liver histology suggests an increased rate of cell turnover with either As compound, but few specific changes.
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PMID:Effects of concurrent administration of lead, cadmium, and arsenic in the rat. 19 3

Thirty-one patients with severe gram-negative bacterial infections were treated successfully with a combination of cefamandole nafate plus gentamicin or tobramycin. The patients were divided into two treatment groups: group 1 received low-dose therapy (80--100 mg of cefamandole nafate/kg per 24 hr plus 3 mg of either gentamicin or tobramycin/kg per 24 hr), and group 2 patients, who had suspected bacteremia, received high-dose therapy (170 mg of cefamandole nafate/kg per 24 hr plus 5 mg of either gentamicin or tobramycin/kg per 24 hr). All of the patients were clinically and bacteriologically cured of their primary infections. All four episodes of bacteremia were cleared within 24 hr after therapy was initiated. There was a uniform decrease in the rate of creatinine clearance which was slightly greater in group 2 patients; however, all creatinine clearance values were within the normal range and actually improved during therapy. There was no difference between the clearance values of the tobramycin-treated patients and gentamicin-treated patients. A few transient abnormalities in results of liver function tests occurred during the study. In one patient whose serum was positive for hepatitis-associated antigen, the alkaline phosphatase, aspartate aminotransferase, and bilirubin values were elevated on admisssion of the patient to the hospital, increased fivefold during therapy, and decreased to the base-line admission values six days after therapy; however, it is difficult to establish that this reaction was antibiotic-induced hepatic toxicity.
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PMID:Efficacy and safety of cefamandole plus either gentamicin or tobramycin in therapy of severe gram-negative bacterial infections. 34 93

Hyperuricaemia was present in 18 out of 73 men with untreated mild hypertension and was related significantly to alcohol intake, serum aspartate transaminase activity, and obesity. In the whole group the mean serum urate concentration correlated highly significantly with alcohol intake and activities of serum aspartate and alanine transferases but not with ponderal index, serum creatinine concentration, age, or blood pressure. Hypertension and hyperuricaemia are related at least in part through their common association with frequent alcohol use. A serum urate concentration exceeding 0.5 mmol/l (8--4 mg/100 ml) in a man with untreated hypertension is highly suggestive of heavy alcohol consumption. There was no evidence that hyperuricaemia had a deleterious effect on renal function.
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PMID:Hyperuricaemia in hypertension: role of alcohol. 43 9

In order to verify the influence of sampling time on blood constituents, populations of supposedly healthy subjects were grouped according to age, sex, deviation from their ideal weight, state of fasting or nonfasting, and time of sampling. Each fasting subject in one group underwent two samplings during the course of a morning: the first at 08.00 and the second between 09.00 and 12.00. In the second group, the first was taken at 13.00, and the second between 14.00 and 16.00. Subjects in the second group had eaten a standard meal of 700 calories at 12.00. Differences between the paired samples from a given individual are discussed with respect to the time of sampling for plasma urea, creatinine, proteins, albumin, calcium, sodium, potassium, cholesterol, uric acid, chloride ions, phosphate, bilirubin, aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, creatine phosphokinase, alkaline phosphatase, hemoglobin and erythrocyte and leukocyte counts. Variations due to the time of sampling were large for phosphorus, bilirubin, and leukocyte count.
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PMID:The effect of sex, deviation from ideal weight and sampling time on blood constituents in presumably healthy subjects. 43 75

Changes in concentration of a number of blood metabolites in 30 thoroughbred horses were recorded after an 1110 metre race. No significant changes occurred in blood urea or aspartate aminotransferase during the three hours after racing. Plasma sodium, potassium and calcium levels were increased immediately after racing but had returned to normal one hour after racing. Plasma phosphate showed a significant fall in concentration one hour after racing. Creatinine and lactic acid concentrations were elevated ten minutes after racing and although they subsequently decreased, the level of lactic acid was still significant one hour later. Uric acid levels were well above resting levels at ten minutes after racing but rose even more in the subsequent hour. Urinary uric acid levels were also elevated during this time. Three hours after racing some horses still had elevated plasma uric acid levels and all of them showed a significant rise in creatine phosphokinase. The possible physiological basis of these findings is discussed.
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PMID:Changes of blood metabolites in horses after racing, with particular reference to uric acid. 44 60

Rice culture of a toxigenic strain of Aspergillus ochraceus was fed at a concentration of 25% to weanling pigs for 10 days. The clinicopathological abnormalities reflected renal damage. Activities of lactic dehydrogenase, glutamic-oxaloacetic transaminase and isocitrate dehydrogenase were increased in the urine but not in the serum. Serum concentrations of urea nitrogen and creatinine were high. Cellular and granular casts, blood, protein, and glucose were in the urine of pigs fed toxic diet. Serum concentrations of K+, Na+ and Cl- were unchanged, but concentrations of these electrolytes were reduced in the urine.
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PMID:Mycotoxicosis produced in swine by cultural products of an isolate of Aspergillus ochraceus. II. Clinicopathologic changes. 50 95

The effect of danazol in a dose of 600 mg a day was studied in 20 women with moderate or severe endometriosis. The clinical effect was found to be excellent and repeat laparoscopy after about 6 months treatment revealed a marked regression in all patients with only small residual foci of endometriosis in two of them. The side effects were few. The metabolic studies revealed a significant increase in serum aspartate aminotransferase (AST), serum alanine aminotransferase (ALT), serum potassium, serum albumin and serum creatinine, but a significant decrease in serum gamma glutamyl transpeptidase (GT). Serum sodium showed no alteration. A longitudinal study of basal plasma luteinizing hormone (LH) and follicle-stimulating hormone (FSH) and their responses to 25 microgram gonadotrophic releasing hormone (GnRH) i.v. as well as basal plasma levels of oestradiol, oestrone, progesterone and prolactin was performed. During treatment with danazol (600 mg a day) basal levels of LH, FSH, oestradiol, oestrone and progesterone were low but did not differ from the levels found in the early follicular phase of the menstrual cycle. On the other hand the pituitary response to GnRH was significantly greater for both LH and FSH than observed during the early follicular phase. These conflicting results are discussed. It seems that danazol inhibits the pituitary secretion of biologically active LH and FSH and this action is responsible for the decreased ovarian steroid secretion. Whether the atrophy of the uterine and ectopic endometrium is an effect of the reduced oestradiol levels or is a direct effect of danazol on endometrial oestrogen receptors, or a combination of both modes of action, is not clear.
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PMID:Hormonal, metabolic and clinical effects of danazol in the treatment of endometriosis. 53 48

The expert group "Drug Interference in Clinical Chemistry" of the Bureau of Reference, Directorate General for Research, Science and Education of the Commission of the European Communities, consisting of one participant of each member of the European Communities, presents this first report on the final results of its activities. Within the framework of a first stage basic program, the paper describes interferences of therapeutic and elevated doses of ascorbic acid on commonly used clinical chemical methods. This is the result of a bipartite study that was jointly planned, carried out and evaluated. Local and personal influences have been eliminated, as have variations due to methodology, measurement equipment and reagents, in order to be able to present distinct causal effects of ascorbic acid. No definite influence of ascorbic acid on analytical values for urea, cholesterol, calcium, protein, bilirubin, aspartate aminotransferase and alkaline phosphatase could be detected. At therapeutic concentrations, ascorbic acid distinctly interferes with the analysis of glucose, uric acid, creatinine and inorganic phosphate. The extent and direction of interferences vary, depending on the type of reaction, kit and apparatus. In some cases the influence of ascorbic acid results in severe disturbance of the analytical methods leading to useless values.
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PMID:Drug interference in clinical chemistry: studies on ascorbic acid. 62 9

Spontaneous renal artery embolism is not rare, but a correct diagnosis and appropriate treatment are often delayed. Clinical features and follow-up of 17 cases are reported. Cardiac disease or arrhythmias pre-existed in 16 patients. Initial symptoms included flank pain (seven cases), abdominal or chest pain alone (seven), and nausea and vomiting (eight). Fever (greater than or equal to 37.5 degree C) occurred in 10 cases and flank tenderness in only eight. Laboratory findings included leukocytosis, proteinuria, hematuria, and elevated levels of lactic dehydrogenase, serum glutamic-oxalacetic transaminase, serum glutamic-pyruvic transaminase, and alkaline phosphatase. Serum creatinine level exceeded 1.3 mg/dl in 88% and 4.0 mg/dl in 65%; four patients required dialysis. The diagnosis, made by scintiscan, arteriography, or both was often delayed. Renal embolization was bilateral in seven patients and unilateral in 10, with serum creatinine level above 4.0 mg/dl in five of the latter. Emboli to other organs caused early death; cardiovascular disease led to later death. With anticoagulants, renal function returned in patients surviving more than 1 month, even those with bilateral emboli. Thus, renal embolism is recognizable if the disease is considered, and a favorable outcome is common with long-term anticoagulants.
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PMID:Renal artery embolism: clinical features and long-term follow-up of 17 cases. 69 26

The results of sending specimens through a computerized pneumatic airtransport system and manually delivering specimens were compared for 15 chemical tests and six hematologic procedures. All specimens were collected from inpatients and outpatients into evacuated glass containers. The specimens traversed a maximum of 829 feet (253 meters) involving 16 bends and eight transfer units at 25 feet/second (7.6 meters/second). Only the activity of lactate dehydrogenase exceeded the precision of the test in pneumatically transported specimens. Ruptured erythrocytes in incompletely filled vacuum tubes were the likely source of the increased lactate dehydrogenase activity. Neither the serum sodium, potassium, chloride, carbon dioxide, total protein, albumin, calcium, glucose, creatinine, total bilirubin, alkaline phosphatase, aspartate transaminase, acid phosphatase, uric acid, leukocyte count, erythrocyte count, hemoglobin, hematocrit, nor the prothrombin time and partial thromboplastin time were affected by pneumatic transport. It is concluded that the pneumatic system tested provides a safe, efficient method of transporting the blood specimens tested.
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PMID:Evaluation of a computer-directed pneumatic-tube system for pneumatic transport of blood specimens. 70 6


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