Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.6.1.2 (alanine aminotransferase)
 26,722 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Isolated working rat hearts were made ischemic by introducing a one-way aortic ball valve. After the ischemic period the hearts were perfused in a retrograde non-working way for 30 min. Flow rates, glycogen, ATP, and creatine-phosphate went down during the time of ischemia, whereas tissue lactate accumulated. For shorter periods of ischemia these values were normalized but after 30 min of ischemia the hearts seemed to be irreversibly damaged. There was a leakage of GOT, GPT, LDH, and CPK from all hearts when ischemic from 5 to 30 min. Different factors that might be of importance for the degree of ischemic injury were tested. The injury tended to be more severe at higher heart rates. Addition of adrenaline 10(-6)M resulted in excessive myocardial damage. A variation of pH from 7.1 to 7.7 did not alter the effects of the ischemic injury. One group of rats were injected with adrenaline for 8 weeks to simulate chronic stress. When hearts from these rats were made ischemic they were more prone to fail compared to controls. The failing hearts, on the other hand, had a lower leakage of enzymes, possibly due to a less severe myocardial damage. A high mechanical performance and a normal noradrenaline content of the hearts are key factors for the development of myocardial infarction, as indicated by this study.
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PMID:Factors of importance for the degree of ischemic injury in the isolated rat heart. 0 96

In a group of 205 patients with alcoholic diseases of liver the diagnostic relevance of biochemical tests (GOT, GPT, AP, GGTP, BSP) was reconsidered with discriminatory process (separation of diagnosis). The group contained 16 patients with nutritional-caused and 41 cases with alcoholic-caused fatty-infiltration of liver. 148 patients showed a toxic chronic liver disease; 52 a chronic hepatitis and 96 cirrhosis of liver. Laparoscopy and morphology guaranteed the clinical diagnosis and therefore the accuracy of biochemistry in separation of diagnosis was given. The biochemical tests were not able to offer a separation of fatty-infiltration with reference to cause, changes of the process in toxic hepatitis and cirrhosis were announced. Intersection in several cases was noticed and biochemical tests were not able to substitute endoscopy and morphology for clinical and diagnostic use in all cases. In every regard the enzyme-tests,--above mentioned--, and determination of sulfobromthalein are aptly to development of diseases and deficiency of alcohol.
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PMID:[Relevance of biochemistry in diagnosis and development of alcoholic liver disease (author's transl)]. 0 20

Some methodological problems in clinical enzymology, including instability of enzymes in the incubation mixture and requirements for optimal reaction conditions, are highlighted. The importance of a knowledge of fundamental enzyme biochemistry and physiology as the basis for their diagnostic application is stressed, and the different behaviour of some hepatic enzymes--namely, GOT, GPT, gamma-GT, and OCT, in various pathological conditions is traced back to their characteristic biochemical and physiological properties. In the field of urinary enzymes a knowledge of the ideal requirements for the enzyme investigation of the various renal functions and of the properties of potentially valuable enzymes permits a critical selection of the really useful ones.
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PMID:A new look at the measurement and interpretation of enzyme assays. 0 46

gamma-Glutamyl transpeptidase, a membrane-bound enzyme playing an important role in the active amino acid transport across cellular membranes, is shown to be elevated in the serum of patients with myotonic muscular dystrophy. No increase of AP, LAP, GOT and GPT activities in the sera of some of the patients studied is observed. Possible interpretations in relation to the pathogenesis of myotonic dystrophy are discussed.
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PMID:Gamma-glutamyl transpeptidase. Elevated activity in myotonic dystrophy. 0 80

The circadian rhythms of liver glycogen, plasma glucose, corticosterone and insulin, and hepatic activity of PK, G6PDH, ME, Ac, CoA carbox. PEP-CK and GPT were studied in adult rats. Animals either received a mixed diet ad libitum (8% protein) or a protein meal (1.1 g protein) given at 05:00 or 17:00 h, with free access to a protein-free diet (separately fed). When the protein meal was ingested during the lighted period (17:00) the 24-hour average level of liver PEP-CK was greater than in rats consuming protein during darkness (05:00). In the latter case, modification of the circadian rhythm of liver glycogen and of circadian rhythm of liver PK, G6PDH, ME and Ac.CoA carbox. activity (increase of 24 h average level, extension of period of high activity, sudden increase after ingestion of protein meal) were observed. Conversely, the circadian rhythm of plasma insulin and corticosterone and of liver PEP-CK and GPT activity were only slightly affected by the mode of feeding.
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PMID:Schedule of protein ingestion and circadian rhythm of certain hepatic enzyme activities involved in glucose metabolism in the rat. 0 45

Twelve male duodenal ulcer in-patients received in a double-blind trial either the histamine H2-receptor antagonist cimetidine (4 X 200 mg/d p.o.) or placebo capsules. Ulcer sizes were assessed endoscopically before therapy followed by repeat endoscopy at weekly intervals. Duodenal ulcer healing was significantly more rapid in cimetidine-treated patients than in those receiving the placebo (chi2 test; P less than 0.0005). Plotting of log ulcer sizes (mm2) against time (days) resulted in regression lines the slopes of which indicated the respective half-time of ulcer healing: about 6 days on cimetidine therapy and about 20 days on placebo treatment. Gastric secretion of acid, protein, pepsin, and N-acetylneuraminic acid-containing glycoproteins was not altered by a 4-week course of daily cimetidine or placebo, nor pancreatic secretion of bicarbonate and enzymes. No statistically significant changes in laboratory findings (haemoglobin, white blood-cells, neutrophils, platelets, alkaline phosphatase, blood-urea, serum-creatinine, GOT, GPT) were associated with treatment.
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PMID:[Effective treatment of duodenal ulcer with cimetidine (author's transl)]. 1 Oct 86

In order to evaluate liver function during pregnancy the enzyme activities of GPT, GOT, GLDH, LDH, AP, LAP, gamma-GT and CHE were determined in 272 healthy pregnant women from the 16th week of gestation up to term. The normal range of GPT, GOT, GLDH, LDH, gamma-GT and CHE did not differ significantly from those in non-pregnant women. Increases in AP and LAP are conditioned by placental synthesis. The functional reserves of a healthy liver obviously suffice to compensate for increased demands during pregnancy. Increases in enzyme aktivities during pregnancy are not physiologic - except for increases in AP and LAP.
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PMID:[Liver function in undisturbed pregnancy]. 1 Nov 62

90 chronic alcoholics (55 men and 35 women, aged between 20 and 60 years) were investigated to determine how alcohol withdrawal effects the pattern of enzymes in plasma and if changes in this enzyme pattern could be used as criteria for evaluation of the recovery process. Among the different enzymes tested, gamma-glutamyl-transpeptidase (GGTP) and the transamines seemed the most suitable parameters. At the beginning of the alcohol withdrawal course, 79 out of 90 patients (80%) showed elevated values of one of these enzymes in plasma. GOT was elevated in 31 (34%), GPT in 24 (23%) and GGTP in 79 (88%) of the cases. In 49 patients (54%) GGTP was the only enzyme found to be elevated. The values of GGTP were on the average higher than those of GOT and GPT. GGTP has thereforeto be regarded as the most sensitive enzyme since it was elevated in most of the patients. GGTP reacted with 6.8 times more sensitivity than GOT and 6.3 times that of GPT. After withdrawal of alcohol the three enzymes showed a decline in all 79 patients. The transaminases normalized faster than GGTP. GTP fell into the upper normal limit after only 30 days. Among the 90 alcoholics examined, 14 relapsed during the alcohol withdrawal course. After the new excess of alcohol intake, the GGTP in plasma rose immediately. Alcohol abuse was suspected in 50% of the patients due to the increase in this enzyme and was subsequently confirmed by the patients. Acute alcohol loading in normal volunteers did not lead to an increase in GGTP activity. A comparison of the histology of liver biopsy material showed that neither the transaminases nor the alkaline phosphatase and GGTP served to differentiate the various forms of alcoholic liver damage. However, GGTP represents the most sensitive enzymatic parameter for the detection of alcoholic liver disease. This enzyme is useful in evaluating the success of a course of alcohol deprivation. The decreasing values during such treatment, as well as the prompt increase after a relapse, points to the high sensitivity of this enzyme. A further argument is that in 54% of the patients elevation of GGTP only was present. Since no liver damage could be demonstrated in these patients with the aid of the other liver enzymes, the elevation of GGTP may be related to the alcohol intake through an enzyme induction mechanism such as has been demonstrated for this enzyme with certain drugs.
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PMID:[The behavior of gamma-glutamyltranspeptidase and other liver enzymes in the plasma during alcohol withdrawal treatments]. 1 56

In well defined liver diseases in 69 alcoholics and in 71 patients without history of alcoholism the enzymatic findings were compared. Also a group of 43 alcoholics with praedelirium or delirium tremens were examined. In steatosis due to alcohol, the average of GGTP (145 U/l) attains values two times higher than in comparable cases of non-alcoholic origin (73 U/l). In cirrhotics with alcoholism, the average GGTP levels (477 U/l) exceed those obtained in patients with cirrhosis of other origin (110 U/l), four times more. Similar or higher GGTP values were found only in primary biliary cirrhosis. After a period of at least 3 months of abstinence, GGTP values had decreased (to 68 U/l) in the average). The highest values of GGTP were found in acute alcoholic hepatitis and in chronic alcoholics with praedelirium or delirium tremens. GGTP accords diagnostic hints in comparison with other enzymes, as shown by a quotient of GGTP-GPT. GGTP is very helpful for differentiation and long time observation of alcoholic liver disease, especially with regards controlling abstinence of alcohol.
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PMID:[Gamma-glutamyl-transpeptidase in alcoholic liver diseases]. 1 29

One hundred and seven Wistar rats, 8 weeks old and weighing 180-200 g, were housed under conditions of controlled temperature (22 plus or minus 2 degrees) and lighting (light on from 07:00 to 19:00). They were divided into 2 groups and fed diets containing either 15 per cent cas-protein for 23 days. Food consumption was recorded every 2 hours for each animal during 48 hours. Four or five rats from each group were killed every 2 hours for 24 hours and the hepatic activities of PK (EC.2.7.1.40),G6P-DH (EC1.1.1.49), ME (EC1.1.1.40), Acetyl-CoA-carbox (EC.6.4.1.2.),PC(EC.6.4.1.1.), PEP-CK(EC.4.1.1.32), G6Pase (EC.3.1.3.9) and GPT (EC.2.6.1.2.) were measured...
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PMID:[Dietary protein level and circadian variation of enzyme activities for glucose metabolism and lipogenesis in male rats (author's transl)]. 1 10


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