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

Using a recently developed enzyme-linked immunosorbent assay specific for 3-(cystein-S-yl)acetaminophen adducts we have quantitated the formation of these specific adducts in liver and serum protein of B6C3F1 male mice dosed with acetaminophen. Administration of acetaminophen at doses of 50, 100, 200, 300, 400 and 500 mg/kg to mice resulted in evidence of hepatotoxicity (increase in serum levels of alanine aminotransferase and aspartate aminotransferase) at 4 hr in the 300, 400 and 500 mg/kg treatment groups only. The formation of 3-(cystein-S-yl)acetaminophen adducts in liver protein was not observed in the groups receiving 50, 100 and 200 mg/kg doses, but was observed in the groups receiving doses above 300 mg/kg of acetaminophen. Greater levels of adduct formation were observed at the higher doses. 3-(Cystein-S-yl)acetaminophen protein adducts were also observed in serum of mice receiving hepatotoxic doses of acetaminophen. After a 400 mg/kg dose of acetaminophen, 3-(cystein-S-yl)acetaminophen adducts in the liver protein reached peak levels 2 hr after dosing. By 12 hr the levels decreased to approximately 10% of the peak level. In contrast, 3-(cystein-S-yl)acetaminophen adducts in serum protein were delayed, reaching a sustained peak 6 to 12 hr after dosing. The dose-response correlation between the appearance of serum aminotransferases and 3-(cystein-S-yl)acetaminophen adducts in serum protein and the temporal correlation between the decrease in 3-(cystein-S-yl)acetaminophen adducts in liver protein and the appearance of adducts in serum protein are consistent with a hepatic origin of the adducts detected in serum protein.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Immunochemical quantitation of 3-(cystein-S-yl)acetaminophen adducts in serum and liver proteins of acetaminophen-treated mice. 291 71

The clinical pathology of Schistosoma curassoni infection in sheep and goats was studied for 22 weeks following experimental infection with 7000 and 4000 cercariae, respectively. Excretion of eggs began at week 7 after infection: in goats the numbers increased to 30 to 50 eggs per gram faeces (epg) at weeks 8 to 18, followed by a reduction. In a pregnant goat, epg values increased markedly before and after parturition. The mean faecal egg counts in sheep were lower than in goats, increasing to a maximum level of 30 epg at weeks 16 and 17 after infection. Infected sheep maintained growth rates roughly comparable with controls, whereas infected goats failed to gain as much weight as the controls. Infected goats and sheep produced eosinophil counts of about 3 x 10(3) mm-3, five and eight weeks after infection, respectively. Sheep developed a progressive anaemia from week 11 after infection, in goats blood values remained within normal limits. Differences in serum protein concentration were observed between infected and uninfected goats about nine weeks after infection, but not in sheep. Increased total protein values, hyperglobulinaemia and lowered albumin to globulin ratios were features of infected goats. Serum glutamate oxaloacetate transaminase, glutamate pyruvate transaminase, gamma-glutamyl transferase, total lactate dehydrogenase and bilirubin were not significantly changed. The mean recovery in sheep was 608 worms, in goats 428 worms, but the total tissue egg counts were higher in the latter. Of the total eggs deposited in the goats 92 per cent were found in the liver with 51.5 per cent in the ovine liver. The histopathological changes were studied.
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PMID:Clinical pathology of experimental Schistosoma curassoni infections in sheep and goats. 340 25

Reference values for free amino acids in male rabbits (n = 145) were determined by gas chromatography. In addition, reference values for glucose, serum transaminase activities (aspartate aminotransferase, alanine aminotransferase), and serum protein fractions are reported.
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PMID:Reference values for free amino acids and other biochemical constituents in serum of male rabbits. 380 14

Total proteins (albumin, globulins and their fractions); carbohydrate (intravenous glucose tolerance); lipid (serum cholesterol, triglycerides, and phospholipids); and liver functioning (alkaline phosphatase, lactic dehydrogenase, and aspartate aminotransferase activities in serum, bromsulfathalein retention, and serum bilirubin); were assayed in 12 Thai women who were not lactating. The tests were performed before, and 3 weeks, 3,6,9, and 12 months after the advent of treatment with medroxyprogesterone acetate (DMPA), which was injected intramuscularly in 150-mg doses every 90 days. Triglyceride concentration was unchanged overall; however, mean fasting triglyceride concentration on Day 20 decreased significantly when compared with Day -33 pretreatment control (P .025). A significant increase ( P .01) in mean fasting cholesterol was demonstrated on Day 20; this, however, was thought to be caused by the high dietary lipid intake during hospitalization rather than an effect of the DMPA. In general, serum protein and lipid levels, and liver function and glucose tolerance, remained unchanged over 1 year. There was, however, a significant and persistent increase in insulin level in all subjects after initiation of hormone treatment during the first 30 minutes of intravenous glucose load. The study concludes that DMPA does not interfere with glucose tolerance, lipid and protein metabolism, or liver function during its administration.
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PMID:Effects of medroxyprogesterone acetate on serum lipids, protein, glucose tolerance and liver function in Thai women. 644 43

The purpose of this investigation was to explore the mechanisms and possible stereoselectivity of the interaction between warfarin and chloramphenicol in rats. Chloramphenicol had no apparent effect on the serum protein binding of R-(+)-warfarin or S-(-)-warfarin in vitro or in vivo. Treatment with i.p. chloramphenicol, 50 mg/kg every 4 hr or 30 mg/kg every 6 hr, decreased the plasma clearance of free warfarin by one-half or more, with no apparent stereoselectivity. The volume of distribution was not significantly affected; the half-life of each warfarin enantiomer was appreciably increased by chloramphenicol. Treatment with chloramphenicol had no apparent effect on relative liver size and on serum aspartate aminotransferase activity. Prothrombin complex activity in plasma was not affected by in vitro addition or in vivo administration of chloramphenicol alone. Chloramphenicol treatment did not affect significantly the elimination kinetics of endogenous prothrombin complex activity and the plasma concentration of free R-(+)-warfarin or S-(-)-warfarin required to decrease prothrombin complex activity synthesis rate to one-half of normal. It appears that the pronounced potentiation of the anticoagulant effect of warfarin by chloramphenicol is due only to inhibition of warfarin metabolism and that this effect is not stereoselective.
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PMID:Pharmacokinetic and pharmacodynamic studies of acute interaction between warfarin enantiomers and chloramphenicol in rats. 649 77

Of 510 adult buffaloes examined, 88 (17.3 per cent) were found to be suffering from Fasciola gigantica infestation. There was a reduction in the haemoglobin, packed cell volume and red blood cell count in the fasciola affected buffaloes and an increase in their white blood cell count. There was no significant change in mean corpuscular volume, mean corpuscular haemoglobin or mean corpuscular haemoglobin concentration in the fasciola affected buffaloes. There was also a decrease in total serum protein and albumin concentrations and in the albumin globulin ratio and significant increase in alpha globulin and gamma globulin concentrations and in the activity of the serum enzymes aspartate aminotransferase, alanine aminotransferase, serum alkaline phosphatase and ornithine carbamoyl transferase.
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PMID:Changes in blood cellular components, serum protein concentrations and serum enzyme activities in buffaloes infested with Fasciola gigantica. 714 34

1. The effects of implanting turkeys with trienbolone acetate (TA) upon fluid balance and blood chemistry were studied. 2. The Na and water contents of skeletal muscles were increased by TA treatment while K was unaltered. 3. The extracellular space expressed as a proportion of starved body weight was unaffected by TA implantation. 4. Plasma or serum concentrations of P, Ca, Mg, Na and K and activities of the enzymes aspartate aminotransferase [EG 2.61.1], creatine kinase [EC 2.7.3.2] and gamma-glutamyl transferase [EC 2.3.2.2] were not changed by TA treatment. 5. Packed cell volume was significantly increased by TA implantation after a delay of some 2 to 3 weeks while plasma protein concentrations were immediately decreased for a period of two weeks before nearly normal concentrations were obtained again. 6. Erythrocyte sedimentation rate was decreased by TA treatment, but serum protein electrophoretic pattern was unchanged.
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PMID:The effects of trienbolone acetate implantation of turkeys upon fluid balance and blood chemistry. 726 Jul 1

Captive mallards (Anas platyrhynchos) were fed wheat containing 5.8 ppm deoxynivalenol (DON, vomitoxin) from an outbreak of Fusarium graminearium head-blight that occurred on grain crops in Manitoba, Canada, during 1993. There was no evidence of taste aversion to this grain during a 10-day palatability trial. No significant differences were detected in serum protein, calcium, glucose, creatinine kinase, aspartate aminotransferase or uric acid levels, blood packed cell volume, or body or organ weight, between ducks fed contaminated wheat and those fed uncontaminated wheat during a 14-day feeding trial. No gross or microscopic lesions were detected in birds fed contaminated wheat for 14 days. Based on these results, ducks will consume grain containing moderate levels of DON and short-term exposure to this grain will not result in obvious adverse effects.
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PMID:Consumption of deoxynivalenol-contaminated wheat by mallard ducks under experimental conditions. 862 31

In a prospective study 50 children with new onset epilepsy were investigated. Routine screening for complete blood count, serum protein, albumin, gamma-glutamyltransferase (gamma-GT), aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase, and coagulation studies before, 3, 6 and 9 weeks after commencement of antiepileptic therapy with valproate were carried out. Serum B12 and folate levels were also determined in 29 patients. The aim of the study was to evaluate the effect of VPA on these laboratory findings. We found a significant reduction of red blood count and platelet count, whereas MCV showed a significant upward trend. Vitamin B12 levels were elevated after starting VPA therapy. We found no elevations of liver enzymes, but a significant transient reduction of ALT after 3 and 6 weeks and significantly reduced serum protein and albumin after 3, 6 and 9 weeks. Coagulation studies revealed a significant downward trend in serum fibrinogen and upward trend in thrombin time. The other parameters showed no significant changes after onset of VPA treatment. We think that reduced red blood cell and platelet counts, and elevated MCV indicate a direct toxic effect on a hematopoietic precursor or stem cell in patients treated with VPA. Furthermore, reduced protein, albumin and fibrinogen indicate an impaired liver synthetic function in asymptomatic children treated with VPA monotherapy.
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PMID:Hematologic manifestations and impaired liver synthetic function during valproate monotherapy. 873 99

There is a large inter-subject variability in serum creatine kinase (CK) response after eccentric exercise. This study examined and compared the variability of CK activity, other serum protein increases (aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, aldolase, myoglobin),changes in muscle damage indicators (maximal isometric force: MIF, relaxed and flexed elbow joint angle: RANG and FANG, circumference: CIR, and muscle soreness level: SOR), and changes in magnetic resonance (MR) images. Ten male subjects (21.7 +/- 1.6 yrs) performed 24 maximal eccentric actions of the elbow flexors, and measurements except MR images were taken immediately before and after, and for 10 days after exercise. MR images were taken 7 days after exercise. A large variability in peak CK response (236 - 25,244 IU.I(-1) was found among subjects. Spearman rank-order correlation coefficients (r) revealed significant correlations of peak CK with peak serum protein levels (r = 0.79-0.95), peak changes in MIF (r = 0.73-0.79), RANG (r = 0.69), and CIR (r = 0.91). The higher the peak CK levels, the more profound the abnormality in the MR images and the larger the changes in MR signal intensity (r = 0.90-0.94). It is concluded that the large variability in CK response after exercise seems to be related to the variability in exercise-induced muscle damage.
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PMID:Variability in serum creatine kinase response after eccentric exercise of the elbow flexors. 883 14


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