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  • 1
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The isozymes of malate and isocitrate dehydrogenase and glutamate oxalacetate transaminase can also be detected in isolated liver parenchymal cells. Their distribution to the cytoplasmic and mitochondrial spaces or to chromatographically separated C(ytoplasmic) and M(itochondrial) isozymes shows differences between the rat liver and the human liver. The acute CCl4 intoxication of the rat leads to a mayor loss of C-isozymes. Only in the case of chronic thiaocetamide poisoning can a distinct decrease in M-isozyme be detected, as found in the human liver in acute hepatitis. In other liver diseases with less pronounced cell damage, up to now it has not been possible to prove any distinct alteration of the C/M isozyme relations of GOT and MDH. Further investigations will have to show, whether the observed slight increase of more difficultly eluable lactate dehydrogenase fractions is relevant.
    Notes: Zusammenfassung Die Isozyme von Malat- und Isocitrat-Dehydrogenase und Glutamat-Oxalacetat-Transaminase lassen sich auch in isolierten Leber-parenchymzellen nachweisen. Ihre Verteilung auf cytoplasmatischen und mitochondrialen Raum oder auf chromatographisch getrennte C- und M-Isozyme zeigt Unterschiede zwischen der Rattenleber und der menschlichen Leber. Bei der akuten CCl4-Intoxikation der Ratte kommt es zu einem stärkeren Verlust der cytoplasmatischen Isozyme. Erst bei chronischer Thioacetamid-Vergiftung wird eine deutliche Abnahme der M-Isozyme nachweisbar, wie sie sich in der menschlichen Leber bei akuter Hepatitis findet. Bei anderen Lebererkrankungen mit geringer ausgeprägter Zellschädigung konnte bisher keine deutliche Veränderung der C-/M-Isozym-Relationen von GOT und MDH nachgewiesen werden. Weitere Untersuchungen müssen zeigen, ob der beobachtete geringe Anstieg schwerer eluierbarer Lactat-Dehydrogenase-Fraktionen relevant ist.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 42 (1964), S. 915-918 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Like in the rat liver, also in the human liver 4 isozymes of acid phosphatase can be detected, though in slightly altered percentage distribution. All 4 isozymes are also found in isolated liver parenchymal cells. On fractionated extraction the main part of the overall activity in the mitochondrial space is represented by the isozyme I, in the cytoplasmic space by the isozyme IV. As was to be expected in accordance with the investigations ofDeDuve's, the greatest specific activity on fractionated centrifuging was found in the lysosomes. The lysosomal and mitochondrial fraction mainly contained isozyme I, the supernatant the isozymes III and IV.
    Notes: Zusammenfassung Wie in der Rattenleber, sind auch in der menschlichen Leber vier Isozyme der sauren Phosphatase, wenn auch in gering veränderter prozentualer Verteilung nachweisbar. Alle vier Isozyme finden sich auch in isolierten Leberparenchym-Zellen. Bei fraktionierter Extraktion wird der Hauptteil der Gesamt-Aktivität im mitochondrialen Raum durch das Isozym I, im cytoplasmatischen Raum durch das Isozym IV gebildet. Wie nach den UntersuchungenDeDuves zu erwarten, fand sich bei fraktionierter Zentrifugation die größte spezifische Aktivität in den Lysosomen. In lysosomaler und mitochondrialer Fraktion war vorwiegend Isozym I, im Überstand die Isozyme III und IV vertreten.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To examine the behaviour of the major inhibitors of fibrinolysis (PAI-1 and PAI-2) in normal pregnancy and pregnancy complicated by either pre-eclampsia or hydatidiform mole.Design Prospective study.Setting Antenatal Clinic and Maternity Hospital.Subjects Eleven women with established pre-eclampsia and eleven women, matched by age, parity, and duration of pregnancy who were undergoing uncomplicated pregnancy. Two women having surgery for hydatidiform mole.Main outcome measure Plasma levels of PAI-1 and PAI-2 antigens determined by sensitive specific ELISA. Functional identification of PAI-2 by nondenaturing gel electrophoresis with overlay zymography.Results In pre-eclampsia PAI-2 antigen was significantly lower than in normal pregnancy (105.3 ± 34.9 versues 187.1 ± 67.9 ng/ml; P〈0.001). In contrast PAI-1 antigen was significantly higher in pre-eclampsia than in normal pregnancy (170.7 ± 71.2 versus 113.8 ± 35.6 ng/ml; P〈0.05). In consequence the ratio of PAI-1/PAI-2 increased markedly in pre-eclampsia (2.5 versus 0.6). No PAI-2 was detected in plasma of women with hydatidiform moles.Conclusions PAI-2 levels fell significantly in pre-eclampsia probably as a result of decreased placental mass or function. The raised PAI-1 level in pre-eclampsia may reflect a response to hypertension or renal damage that is not specific to pregnancy or may reflect altered placental function. The use of the ratio of PAI-1/PAI-2 assists in separating normal from abnormal pregnancies.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 186 (1992), S. 348-354 
    ISSN: 0006-291X
    Keywords: [abr] AHA; amino hexanoic acid ; [abr] APMA; aminophenylmercuricacetate ; [abr] PA; plasminogen activator ; [abr] PAI; plasminogen activator inhibitor ; [abr] t-PA; tissue-type plasminogen activator ; [abr] u-PA; urokinase-type plasminogen activator
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 496 (1977), S. 29-35 
    ISSN: 0304-4165
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 186 (1992), S. 348-354 
    ISSN: 0006-291X
    Keywords: [abr] AHA; amino hexanoic acid ; [abr] APMA; aminophenylmercuricacetate ; [abr] PA; plasminogen activator ; [abr] PAI; plasminogen activator inhibitor ; [abr] t-PA; tissue-type plasminogen activator ; [abr] u-PA; urokinase-type plasminogen activator
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 164 (1986), S. 177-181 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 85 (1981), S. 250-251 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 203 (1988), S. 224 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 15 (1968), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: —A longitudinal study of the maturation of mouse cerebral lysosomal enzymes has been completed. Activity of the enzymes, acid phosphatase (I.U.B. 3.1.3.2), β-glucuronidase (I.U.B. 3.2.1.31) and β-acetylglucosaminidase (I.U.B. 3.2.1.30) was assayed spectrofluorimetrically on portions of supernatant from 0.25 M sucrose homogenates spun at 6 x 103 -min. Activities were obtained in native (free) and Triton X-100 activated samples (total).The neonatal period was characterized by relatively low free and high total acid phosphatase activities. An abrupt rise in free activity occurred during the period 10–20 days. Discontinuous anion exchange DEAE cellulose chromatography (0.01 m-tris–maleate, pH 6.3) with elution by ascending molarities of NaCl of the Triton X-100 activated supernatant revealed three major peaks in the adult. A fourth peak, designated as fraction II (‘maturation fraction’) occurred only during the neonatal period, a time also characterized by increased specific activity of fraction I, with no change in fraction IV. The chromatographic fractions were further characterized by optimal pH, ascorbate, fluoride, Cu2+ and Fe2+ ions.The maturation profiles of total, β-glucuronidase and total, β-acetylglucosaminidase differed from each other, and from that of total acid phosphatase. Comparable differences existed in the profiles of the free activities, and the ratio of free:total activity differed for each enzyme at any selected time especially during the neonatal period. These findings are are discussed with reference to the maturation of isoenzyme fractions with age, and suggest that the changes in structure-linked organization of individual lysosomal hydrolases are functions of heterogeneity in enzyme complement of individual lysosomes.
    Type of Medium: Electronic Resource
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