Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:2.3.1.109 (AST)
 6,066 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Forty-three adult one-humped Iranian camels (Camelus dromedarius) were studied to determine their physical, cellular and biochemical parameters of synovial fluid and blood. All the animals were clinically normal with no clinical signs of locomotion problem. Synovial fluid samples were taken from both elbow joints, and blood samples were also obtained from the jugular vein immediately prior to arthrocentesis. The synovial fluid appeared pale, creamy, and clear with no debris. No clot formation was observed at room temperature. Mucin clot test in all samples was normal. The percentage of neutrophils and eosinophils in the synovial fluid was lower than that in blood (P < 0.05). In contrast, the percentage of lymphocytes and monocytes in the synovial fluid was higher than that in blood (P < 0.05). The concentration of protein, glucose, uric acid, inorganic phosphorus, calcium, sodium, potassium, magnesium and the activities of AST, ALT, ALP, CK and LDH was higher in the serum than in the synovial fluid (P < 0.05). Nonetheless, the concentration of chloride in the synovial fluid was higher than in the serum (P < 0.05). The concentration of urea nitrogen in the synovial fluid was similar to that of the serum. Comparing the values of the synovial fluid constituents of the left and the right elbow joint showed that there was no significant difference in any of the physical, cellular and biochemical parameters. No significant difference was found in any of the cellular and biochemical parameters of male and female camels' blood except in red blood cell counts, which was lower in females than in males. Comparing the values of the synovial fluid of male and female camels showed that there was no significant difference in any of the physical, cellular and biochemical parameters.
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PMID:Physical, biochemical and cytologic properties of blood and synovial fluid in clinically normal adult camel (Camelus dromedarius). 967 71

The long-term effects of consumption of marine long-chain n-3 polyunsaturated fatty acids (PUFA) on atherosclerosis in the rabbit were examined. Female Dutch rabbits were fed purified diets, containing 40 energy% total fat, for a period of 2.5 years. To study the dose response relationship between fish oil intake and atherosclerosis, four diets were formulated with fish oil levels being 0, 1, 10 and 20 energy%. A fifth and sixth group were fed an alpha-linolenic acid-(C18:3, n-3) and linoleic acid-(C18:2, n-6) rich diet, respectively. Every 6 weeks, blood samples were taken for determination of clinical chemical parameters, triacylglycerol and total cholesterol levels. Feeding 10 and 20 energy% fish oil containing diets, resulted in an increase of liver enzymes (AST, ALT and ALP). Histological evaluation of the liver also revealed adverse effects of fish oil containing diets. Triacylglycerol blood levels were similar in all groups, and remained constant throughout the study. Total cholesterol levels in blood was significantly lower in the animals fed a linoleic acid-rich diet, as compared with the other five groups. An n-3 long-chain PUFA concentration dependent increase in aorta plaque surface area was observed in the fish oil groups. A significant positive relationship was found between the group mean score for severity of liver pathology and the aorta plaque surface area. These results indicate that the long-chain n-3 polyunsaturated fatty acids in fish oil may be hepatotoxic to the herbivorous rabbit, which may interfere with the outcome of atherosclerosis studies. This finding necessitates the exclusion of liver pathology in experimental studies on atherosclerosis in animal models.
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PMID:The association of increasing dietary concentrations of fish oil with hepatotoxic effects and a higher degree of aorta atherosclerosis in the ad lib.-fed rabbit. 973 17

The effects on goats of Calotropis procera latex given by different routes of administration were investigated. The administration of latex at 1 ml/Kg body weight via the oral route or at 0.005 ml/Kg body weight/day via the intravenous or intraperitoneal route caused death of the goats between 20 minutes and 4 days. When the small dose of latex (0.005 ml/Kg body weight/day) was given by the oral route or intramuscular route no death among the goats occurred. Nervous signs, frequent urination, frothing at the mouth, dyspnoea and diarrhoea were the main features in goats given latex by the oral, intravenous or intraperitoneal route. Lameness was observed in goats given latex via the intramuscular route. Lesions were widespread congestion and haemorrhage, pulmonary cyanosis, enterohepatonephropathy, peritonitis (in goats receiving latex via i.p. route) and haemorrhagic myositis at the site of latex injection. These changes were accompanied by increases in the activities of serum GDH, LDH, ALP, GGT and AST and in the concentrations of cholesterol, urea and creatinine and decreases in the level of total protein.
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PMID:Studies on laticiferous plants: toxic effects in goats of Calotropis procera latex given by different routes of administration. 985 66

Standardisation in clinical enzymology needs not only reference methods but also reference materials. While single-enzyme reference enzymes have been developed, a multienzyme certified reference material (MECRM) available in high amount remains to be produced. To transfer trueness from the value of the reference system to patients' results, validated enzyme calibrators (EC) are also needed. Both the MECRM and the ECs must exhibit the same catalytic properties as the corresponding enzymes in human plasma. Moreover, commutability of these materials with patients' samples must be experimentally tested for one or a set of methods defined by an analytical specificity equal to that of the reference method. Various experimental studies have shown that the commutability of an enzyme material depends on the source of enzyme and its purification process, the matrix (including cofactors, effectors, additives, stabilisers... ) and the mode of processing of the final material. To promote intermethod calibration in clinical enzymology, a collaborative programme between the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC), Institute for Reference Materials and Measurements (IRMM, Geel, Belgium) and IFCC corporate members is in progress for the development of a MECRM containing amylase, ALT, AST, ALP, CK, GGT, LDH, and lipase and exhibiting a wide and defined commutability.
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PMID:Preparation of enzyme calibration materials. 1002 22

In this study, 11,284 mg/m3 (2600 ppm) of xylene was administered for 8 hours a day to pregnant rats by means of inhalation, starting from the sixth day of their pregnancies. Furthermore, while a group of non-pregnant rats inhaled the same amount of xylene during the same period, the control group inhaled clean air. Consequently, in addition to the embryotoxic effects of xylene, the effects on the various tissues of the mothers and their litters were observed light and electron microscopes. No external anomalies were observed in any of the rats born at the end of the 21st day, and there were no macroscopic defects in their organs either. While following xylene inhalation no structural defects in the kidney and pancreas was found, expansions in the smooth endoplasmic reticulum of the liver tissues, increases in the lysosomes, and defective mitochondrion structures were found in the pregnant and non-pregnant rats. It was noticed that xylene in particular caused structural defects in the liver of the fetus. Compared to the control groups, increases were observed in the activities of the AST, ALT, ALP, and Arginase enzymes in the liver.
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PMID:The effect of xylene inhalation on the rat liver. 1010 37

Twenty-eight dogs with iatrogenic hyperadrenocorticism were studied. The most common clinical signs were cutaneous lesions (27/28), polydipsia (21/28), polyuria (19/28), and lethargy (16/28). The most predominant findings on biochemical profile were elevated alkaline phosphatase (ALP, 15/28) and alanine transferase (ALT, 14/28); hypercholesterolemia (14/28); elevated aspartate transferase (AST, 12/28); and elevated triglycerides (12/18). Baseline cortisol levels of all 28 dogs were at the lower end of the reference range and exhibited suppressed or no response to adrenocorticotropic hormone (ACTH) stimulation. The mean time for each dog to show initial improvement of clinical signs after corticosteroid withdrawal was six weeks, with another mean time of 12 weeks to demonstrate complete remission.
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PMID:Iatrogenic hyperadrenocorticism in 28 dogs. 1033 57

The effect of dietary administration of cholic acid on tumorigenesis in the liver was investigated in male Fischer-344 rats after carcinogenic initiation by diethylnitrosamine (DEN); progression of liver tumors was examined in the rats fed 0.4% cholic acid-containing diet (CA group) and the rats fed standard diet (C group) at 15, 20 and 25 weeks after administration of DEN. The total bile acids and cholic acid in serum of CA group were 150 nmol/ml and 117 nmol/ml, being 31-fold and 51-fold higher than those in C group (p<0.0001, each). Serum AST and ALT were significantly higher in CA group than in C group at 15 weeks (p<0.01). Serum ALP was significantly higher in CA group than C group at each time point (p<0.01, each). Liver tumors, whose histology was hepatocellular carcinoma, developed at 15 weeks in both CA and C groups. However, tumor volume and tumor weight were significantly increased in CA group, compared to those in C group at each time point (p<0.001, p<0. 001, p<0.01, p<0.001, p<0.01 and p<0.05). The percentage of apoptotic cells in CA group at each time point was significantly lower than C group (p<0.05, p<0.01 and p<0.05). The percentage of bcl-2 positive tumor cells in C group at 20 weeks was 1.88+/-2.59%. However, it dramatically increased to 34.00+/-13.67% in CA group (p<0.0001). It was also higher in CA group than in C group at 15 and 25 weeks (p<0.05 and p<0.01). In addition, the bax-positive cells were higher in CA group than in C group at 20 weeks (p<0.05). These data suggest that oral administration of cholic acid promotes liver tumorigenesis initiated by DEN through reducing apoptosis mediated by overexpression of bcl-2.
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PMID:Oral administration of cholic acid promotes growth of liver tumors initiated by diethylnitrosamine in rats. 1040 35

Picroliv, the active constituent isolated from the plant Picrorhiza kurroa, was evaluated as a hepatoprotective agent against ethanol-induced hepatic injury in rats. Alcohol feeding (3.75 g/kg x45 days) produced 20-114% alteration in selected serum (AST, ALT and ALP) and liver markers (lipid, glycogen and protein). Further, it reduced the viability (44-48%) of isolated hepatocytes (ex vivo) as assessed by Trypan blue exclusion and rate of oxygen uptake. Its effect was also seen on specific alcohol-metabolizing enzymes (aldehyde dehydrogenase, 41%; acetaldehyde dehydrogenase, 52%) in rat hepatocytes. The levels of these enzymes were found to be reduced in the cells following alcohol intoxication. Ethyl alcohol also produced cholestasis (41-53%), as indicated by reduction in bile volume, bile salts and bile acids. Picroliv treatment (3-12 mg/kg p.o. x45 days) restored the altered parameters in a dose-dependent manner (36-100%).
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PMID:Ex vivo and in vivo investigations of picroliv from Picrorhiza kurroa in an alcohol intoxication model in rats. 1047 71

Technical quinalphos (0.5, 1.5, 2, 3 or 4.5 mg/kg body weight) was administered orally to pregnant rats from day 6-15 of gestation. At 3 and 4.5 mg/kg/day, quinalphos produced significant changes in hepatic ALT, ALP and serum ALT, AST, ALP and LDH activity along with hepatocellular changes in dams. The AchE activity in brain and red blood cells was also significantly inhibited at these two doses. At 0.5, 1.5 and 2 mg/kg/day, however, quinalphos did not produce any such changes. Up to a dose of 2 mg/kg/day there was no foetotoxic or teratogenic effect, as evidenced by number of implantation sites, percent resorption, foetal weight, morphological, visceral and skeletal evaluations. Hence, 2 mg/kg body weight of quinalphos could be considered as the no-observed-effect level (NOEL) on foetal and maternal toxicity in rats.
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PMID:Assessment of the no-observed-effect level (NOEL) of quinalphos in pregnant rats. 1047 33

This study was constructed to investigate the relationship between renal anaemia and erythropoietin (EPO) concentrations in chronic renal failure (CRF) patients and to evaluate the possible role of the liver. Serum EPO levels were measured in blood samples from 20 CRF patients on hemodialysis (HD), 20 liver cirrhosis (LC) patients, 20 patients having both CRF and LC and undergoing HD, and 20 normal control subjects. Blood cell counts, iron indices (iron, total iron-binding capacity (TIBC) and ferritin), renal function (blood urea nitrogen (BUN) and creatinine), hepatic function (ALT, AST, ALP and bilirubin) investigations were carried out for all the subjects enrolled in this study. CRF patients without LC had serum EPO concentration of 6.21 +/- 0.53 mU/ml (mean +/- SE), which was significantly higher than that in patients having both CRF and LC (4.32 +/- 0.52) (p < 0.01). Both groups showed significantly lower values than the controls (12.75 +/- 0.70) (p < 0.001). LC patients with intact kidneys had significantly higher EPO level (22.70 +/- 1.70) (p < 0.001). No correlation was found between EPO level and any of the hematologic or iron indices.
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PMID:Assessment of erythropoietin levels and some iron indices in chronic renal failure and liver cirrhosis patients. 1068 46


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