Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P17174 (aspartate aminotransferase)
 14,872 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sets of survey specimens having known linear interralationships were analyzed on four occasions by approximately 450 laboratories for the five enzymes lactate dehydrogenase, aspartate aminotransferase, creatine kinase, alanine aminotransferase, and alkaline phosphatase. The results are summarized in terms of the apparent precision and relative accuracy of various analytical systems, and some apparent problems in enzyme assays are identified. The results show that interlaboratory differences in enzyme analyses are not due primarily to differences in the way laboratorians utilize their analytical systems but rather are due to fundamental differences in the instruments and reagents supplied to the laboratorians. The attainment of interlaboratory comparability of enzyme analyses is a problem that can best be addressed by the manufacturers of instruments and reagents, rather than by individual laboratorians.
 ...
PMID:The 1978 College of American Pathologists survey of analyses of five serum enzymes by 450 laboratories. 47 5

The methodology of a large prospective study on the influence of repeated anaesthetics on liver function is reported and the problems involved are discussed. The most suitable patients were those presenting for endoscopic examination of the bladder and urethra, for urethral dilatation and for cervical implantation of radium. Blood samples were taken immediately before induction of anaesthesia and on days 3-4 and 13-15 after operation, when a clinical assessment of the patient was also carried out. The concentrations of six enzymes (lactate dehydrogenase, alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase, serum cholinesterase and gamma glutamyl transpeptidase) werechosen specifically as indices of liver function. The eosinophil count was measured to reflect any hypersensitivity reaction. The non-Gaussian distribution of these necessitated using appropriate non-parametric tests together with parametric tests on logarithmic transformed data. In addition a quantal method was used to measure the frequency of patients showing an "abnormal" increase in enzyme concentrations.
 ...
PMID:Methodology of a prospective study of changes in liver enzyme concentrations following repeat anaesthetics. 52 78

A radioimmunoassay for quantitation of serum myoglobin in healthy individuals and patients with different diseases is described. Purified myoglobin was labelled by an 125I-labelled ester (N-succinimidyl 3-(-4 hydroxy, 5-[125I]iodophenyl) propionate), a commercially available antiserum was used, and the antigen-antibody complex was precipitated with polyethylene glycol 6000. The rapid assay can be performed within 1 h at 37 degrees C with a detection limit of 45 micrograms/l. Prolonged incubation at 4 degrees C for 18 or 72 h gives a detection limit of 6 and 2 micrograms/l, respectively. The mean coefficient of variation of the routine assay was 11%. In healthy human subjects a significant difference in mean serum myoglobin concentration was found between 43 women (34 +/- 17 micrograms/l) and 51 mean 47 +/- 15 micrograms/l). In twenty patients admitted to hospital with the clinical diagnosis acute myocardial infarction, the serum myoglobin concentration profiles were in close agreement with the final diagnosis. In three patients with myocardial infarction serum samples were taken every 2 h after the acute episode, and serum myoglobin levels were compared with the levels of creatine kinase, lactate dehydrogenase, aspartate aminotransferase and creatine kinase isoenzyme-MB.
 ...
PMID:Rapid and sensitive radioimmunoassays for human myoglobin. 53 83

A study of cardiovascular risk factors in middle-aged twin men provided an opportunity to test for genetic variability in the SMA 12/60 (Technicon) battery of clinical chemistry tests. Classical twin methodology was used to analyze the variation of monozygotic and dizygotic twins. In addition, frequency of co-twin contact was used to control for effects of differences in shared environment. Genetic variability played a definite role in controlling four of the 11 reported tests: one-hour serum glucose, serum urea nitrogen, uric acid, and bilirubin. No genetic variation was found for lactate dehydrogenase, phosphorus, and alkaline phosphatase. Significantly higher means for calcium, total protein, albumin, and aspartate aminotransferase in monozygotic twins precluded any statement about heredity and environment for these tests.
 ...
PMID:Genetic variability of clinical chemical values. 55 78

Vitamins A, E and K were incorporated into turkey starter rations at normal (1 x ), 5 x and 50 x the National Research Council recommended vitamin levels and evaluated for their effect on histomoniasis in turkeys. Infected as well as comparable unifected poults were included in all trials. Each vitamin was also evaluated at normal and 50 x the NRC level in combination with ipronidazole, a low-level antihistomonal agent. In addition to performance parameters, glutamate oxaloacetate transaminase (GOT) and lactate dehydrogenase (LDH) plasma enzyme levels were used to evaluate the vitamin effect. None of the vitamins tested alone were found to be effective in terms of reducing mortality and morbidity following a severe Histomonas meleagridis challenge, regardless of the vitamin dose. A significant improvement in performance was demonstrated with the vitamin E (50 X)--ipronidazole combination and a numerical improvement with the vitamin A (50 X)--ipronidazole combination over ipronidazole alone or the poults fed NRC recommended vitamin levels. The GOT and LDH plasma enzyme levels correlated well with the progressive pathological changes associated with the disease. At 11 days post-infection both enzymes were consistently and significantly elevated above those of the uninfected controls, irrespective of the vitamin levels provided. The presence of low ipronidazole in most instances delayed the onset of clinical symptoms and was associated with a delay in enzyme elevation, indicating the excellent correlation and sensitivity of the enzyme method in assessing liver damage.
 ...
PMID:The effect of vitamins A, E and K on experimentally induced histomoniasis in turkeys. 57 Feb 65

The activities of hexokinase, glucose-6-phosphate dehydrogenase, and glycolytic enzymes were higher in the fetal myocardium of the guinea pig than at birth and fell progressively during the 1st mo of life. The alphaHBDH/LDH ratio of H to M subunits of lactate dehydrogenase, was low in the fetus and continued to rise during the 1st mo after birth. The distinction between the left and right ventricular activities of lactate dehydrogenase, which is clear in adult guinea pigs, was absent in the fetus and appeared during postnatal development. Glycogen phosphorylase activity was low in the fetus and at birth. The activities of beta-hydroxyacylcoenzyme A dehydrogenase, succinate dehydrogenase, malate dehydrogenase, and aspartate aminotransferase were low in the fetus, but had reached, or even temporarily exceeded, normal adult levels at birth. Palmitylcarnitine transferase activity was also low in the fetal heart compared with the newborn but continued to increase substantially during the first 2 wk after birth.
 ...
PMID:Myocardial enzyme activities in guinea pigs during development. 59 69

Blood serum of pygmy goats (both sexes, and castrated males) was analyzed to establish biochemical reference values. Influence of age on reference values was also studied. Serum biochemical analyses were made for urea nitrogen, creatinin, bilirubin, lactate dehydrogenase, aspartate aminotransferase, alkaline phosphatase, glucose, uric acid, and total lipids. These serum values for pygmy goats were similar to those reported for man, except as follows: Aspartate aminotransferase activities were slightly higher than those reported for man. Glucose concentrations in pygmy goats were slightly lower than in human beings, and uric acid levels were significantly lower than the values for man. Female and castrated male goats had lower total lipid concentrations than did human beings, whereas intact males had higher concentrations. Thus, of the 9 measured variables for pygmy goats, 5 were comparable to human values. This, together with other attributes, including the small size which conduces to economics of maintenance and enhances the desirability of using pygmy goats in research.
 ...
PMID:Serum biochemistry values in normal pygmy goats. 59 8

The administration of 350 microgram T-2 toxin to six-week-old chickens by intramuscular injection produced a temporary reduction in food intake, changes in plasma triglyceride and total cholesterol levels, increases in plasma aspartate transaminase, alanine transaminase and lactate dehydrogenase activity, falls in the activities of plasma acid and alkaline phosphatases, a reduction in the weight of the pancreas, enlargement of the liver and an apparent exacerbation of hepatic haemorrhage. It also delayed and reduced the hyperlipaemic response to the injection of oestradiol-17beta-dipropionate. These changes were attributed to cytotoxicity involving the liver, intestine and possibly muscle, and an inhibition of enzyme synthesis.
 ...
PMID:Biochemical changes produced by Fusarium T-2 toxin in the chicken. 62 8

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.
 ...
PMID:Evaluation of a computer-directed pneumatic-tube system for pneumatic transport of blood specimens. 70 6

The activities of lactate dehydrogenase (LDH), fructose-1.6-diphosphate aldolase (ALD), aspartate aminotransferase (AspAT), alkaline phosphatase (AP), and N-acetyl-beta-glucosaminidase (NAG) were determined on the basis of 75 synovia samples taken from the tarsal joints (Art. talocruralis) of 41 cattle for slaughter of different sexes and aged between one and 13 years as well as on the basis of 56 synovia samples taken from the knee joints (Art. femoropatellaris), tarsal joints (Art. talocruralis), and carpal joints (Art. intercarpicus) of 20 fattening pigs. Both the general condition and cell content of synovial fluid in clinically intact joints are described. The activities of ALD and AspAT (less than 15 IU/l), LDH (less than 200 IU/l), and NAG (less than 6,000 IU/l) in synovial fluid of cattle were much lower than those in blood serum of the same species. They were normally distributed. AP activity (less than 150 IU/l) in synovial fluid, however, was higher by several factors as compared to activity in blblished. In swine synovial AspAT and AP activities were just as high as in blood serum, while LDH activities were higher by 1.5 times. Major NAG activity was observed, as well. All enzyme activities were characterised by normal distribution. All five LDH isoenzymes but only one AP isoenzyme were established. The above data were compared with findings reported by other authors, and the comparison showed these results as being characteristic of synovial enzyme activities in clinically intact joints of the two species under review.
 ...
PMID:[Occurrence of various enzymes in synovial fluid of cattle and swine]. 74 40


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