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  • 1
    ISSN: 0378-4347
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pregnant rats were acutely treated with ethanol to study the influence of this drug on diamine oxidase activity of maternal, embryonal, and fetal tissues. When ethanol was given on day 12 of gestation, enzyme activity was unmodified in placenta and embryo, whereas it was reduced by 38 and 31%, respectively, in maternal liver and plasma at 3 h. When ethanol was given on day 18 of gestation, diamine oxidase activity diminished in maternal liver, plasma and placenta by about 35–40% at 6 h. Moreover, in the fetus ethanol caused a 35% diminution of enzyme activity in liver at 6 h and a 45% stimulation in brain at 3 h, and of about 65% at 6–12 h. These data may be of interest in view of the physiological role of diamine oxidase in the oxidation of the large amounts of amines produced during pregnancy.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Diamine oxidase activity was studied in female rat tissues during the estrous cycle and after 17 β-estradiol administration. During the estrous cycle, uterine and hepatic enzyme activities were highest at proestrus and lowest at estrus, when estrogen plasma levels are known to be respectively high and low. The administration of 17 β-estradiol to ovariectomized rats caused a rapid and prolonged increase in enzyme activity in uterus and only a transient, increase in the liver. Such increases were prevented by cycloheximide and by actinomycin D administration. No changes were observed in renal enzyme activity during estrus or after hormone treatment. Our data suggest that estrogens regulate, diamine oxidase activity in rat uterus by a mechanism of enzyme induction.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Amino acids 8 (1995), S. 59-68 
    ISSN: 1438-2199
    Keywords: Amino acids ; Liver regeneration ; Hepatocellular carcinoma ; Polyamines ; Acetylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The expression patterns of cytosolic and nuclear polyamine acetyltransferases were studied in normal and neoplastic growth processesin vivo andin vitro to evidentiate the roles played by these enzymes in cell proliferation. In regenerating liver, cytosolic spermidine/spermine N1-acetyltransferase showed similar augments of mRNA level and enzymatic activity during the prereplicative period (4–8 h), whereas spermidine N8-acetyltransferase activity increased later (24 h) when DNA synthesis was maximally enhanced. In fibroblasts continuously dividing, the messenger for spermidine/spermine N1-acetyltransferase rapidly accumulated after serum-stimulation. In cultured Morris hepatoma cells stimulated to logarithmic growth, spermidine N8-acetyltransferase activity remained at plateau for 1 day declining thereafter, while spermidine/spermine N1-acetyltransferase activity immediately decreased. In Yoshida AH-130 hepatoma cells transplanted in rat peritoneum, spermidine N8-acetyltransferase and spermidine/spermine N1-acetyltransferase activities rose, respectively, in concomitance with elevated proliferation-rate and quasi-stationary phase of growth. Since the expression of cytosolic and nuclear acetyltransferases underwent different temporal activation, an involvement of these enzymes in separate metabolic processes controlling normal and neoplastic growth may be suggested.
    Type of Medium: Electronic Resource
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