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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 31 (1996), S. 0 
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cyclosporine (CsA) is a selective immunosuppressant widely used in clinical therapy. Like phenytoin and nifedipine, the drug is associated with gingival overgrowth. This study considers the interaction of CsA and prostaglandin I2 (PGI2), in particular the action of the drug on gingival tissue in vitro and in vivo. The PGI2-synthesis of rat, rabbit and human gingival tissue was examined by bioassay. In vivo CsA-therapy reduces gingival PGI2-synthesis. The results furthermore show a dose-dependent inhibition of PGI2-synthesis by CsA (1–100 μg/ml) in vitro. PGI2-synthesis from in vivo CsA-pretreated probes was further dose-dependently diminished by in vitro addition of CsA. As PGI2 exerts an antiproliferative activity via cAMP-elevation, the drug-induced inhibition of PGI2 production is claimed to be responsible for gingival hyperplasia in CsA-treated patients.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 41 (1985), S. 224-233 
    ISSN: 1420-9071
    Keywords: Spleen ; artery ; splenic ; pathology of
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 138 (1972), S. 34-40 
    ISSN: 1432-0568
    Keywords: Man ; Liver arteries ; Precapillary anastomoses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird an mit verschiedenen Methoden injizierten, menschlichen Lebern die Anzahl von präcapillaren Anastomosen bestimmt, die auf Grund der erörterten Problematik nicht mit der echten Gesamtzahl übereinstimmt. Die Länge dieser Anastomosen läßt eine Unterteilung in inter- und intrasegmentale präcapillare Anastomosen zu, die statistisch gesichert wird. Es wird auf ihre Gesamtzahl eingegangen und das Auftreten vergleichend anatomisch untersucht.
    Notes: Summary After injecting the arterial system of the human liver with various resins the number of precapillary anastomoses is determined by gross dissection. It is shown that the number so determined is not identical with the true number of these anastomoses. Statistical analysis of the length of the anastomoses reveals that there are two populations which are termed inter- and intra-segmental precapillary anastomoses. The number of anastomoses in the whole organ is calculated and results of comparative investigations are reported.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 57 (1979), S. 1137-1138 
    ISSN: 1432-1440
    Keywords: Circulating platelet aggregates ; Foreign surface ; Haemodialysis ; Zirkulierende Thrombozytenaggregate ; Fremdoberfläche ; Hämodialyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei acht Patienten, die sich im Dauerdialyseprogramm befanden, wurde unmittelbar nach Anschluß an den Hämodialysator eine massive Zunahme von zirkulierenden Thrombozytenaggregaten mit der Methode nach Wu und Hoak gefunden. Die Zahl der Aggregate war noch während der Hämodialyse rückläufig, wobei nach 360 min der Ausgangswert wieder erreicht wurde. Als auslösende Ursache muß die Interaktion der Thrombozyten mit der Membranoberfläche des Dialysators gesehen werden. Antikoagulierung mit Heparin allein ist nicht ausreichend, um eine Mikroaggregatbildung während Hämodialyse zu verhindern.
    Notes: Summary In eight chronically haemodialysed patients a significant increase of circulating platelet aggregates (method of Wu and Hoak) was observed immediately after starting haemodialysis. The number of aggregates decreased at the end of haemodialysis reaching the starting values after 360 min. The platelet interaction with the dialysis membrane surface might cause this phenomenon. Anticoagulation with heparin alone was insufficient in preventing aggregate formation during haemodialysis.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 67 (1989), S. 1229-1235 
    ISSN: 1432-1440
    Keywords: PGE1, PGE2, PGI2, Iloprost ; cAMP ; Normal liver ; Hepatocellular cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The binding of prostaglandin (PG) E1 and Iloprost, a chemically stable PGI2-analogue, to purified plasma cell membranes (LPZM) from liver tissue samples obtained at surgery revealed heterogeneity of the binding sites identifying high and low affinity subpopulations. In contrast to these findings only high affinity binding sites were characterized for PGE2. Displacement studies exhibited the highest competition for the PGE1-sites by PGE1 and subsequently by PGE2, Iloprost, PGD2 and PGF2 α. The binding of PGE2 to the hepatic receptor could be best displaced by PGE2 and subsequently by PGE1 and Iloprost, PGD2 and PGF2 α. In addition, PGE1, PGE2 and Iloprost enhanced cAMP-production dose-dependently over baseline. Clinical studies revealed a remarkably lower binding capacity for PGE1 in hepatocellular cancer tissue than in noral liver parenchyma. The different binding behaviour of PGE1 (Iloprost) and PGE2 for the first time provides evidence that PGE1 and PGI2 like at platelet membranes occupate the same receptor also at human LPZM. Since a reasonable number of binding sites for these substances and an enhanced cAMP-production were shown in the liver, the study indicates a regulatory role of PGs in hepatic function.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 49 (1996), S. 515-520 
    ISSN: 1432-1041
    Keywords: Prostaglandin E1 (PGE1) Hypercholesterolaemia ; low-density lipoprotein (LDL) ; LDL receptor ; human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Previous in vitro radioligand binding data have shown that prostaglandin E1 (PGE1) increases the number and the binding affinity of low-density lipoprotein (LDL) receptors of the human liver. Experimental data in normo- and hypercholesterolaemic rabbits have confirmed these findings, showing a significant increase in LDL-binding to the liver in vivo after prolonged PGE1 therapy. Methods: This study aimed to confirm the experimental and animal data in human in vivo. 123I-LDL binding to the liver was quantified in vivo in patients suffering from peripheral vascular disease, seven of them with heterozygous familial hypercholesterolaemia (HC) and five with normal total plasma cholesterol, after PGE1 administration (5 ng·kg−1·min−1; 6 h daily for 5 days/week for 5 weeks). LDL uptake by the liver was quantified by single photon emission computer tomography (SPECT). Results: The amount of LDL trapped by the liver in normocholesterolaemics (45.6%) was significantly higher than in hypercholesterolaemics (22.0%). PGE1 induced an increase in liver LDL binding, which was more pronounced in HC (+38.2%) than in normocholesterolaemic patients (+8.11%).
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1041
    Keywords: Key words Prostaglandin E1; low-density lipoprotein ; cholesterol ; atherosclerosis ; lesional imaging ; arterial apo B-containing lipoprotein influx,
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: An increased apo B-containing lipoprotein influx and cholesterol ester accumulation in arteries are well-known events in human atherogenesis. In vitro and experimental animal studies have provided evidence of a beneficial effect of PGE1 on both vascular apo B-containing lipoprotein accumulation and cholesterol ester content. Methods: We examined the effect of PGE1 (administered via an intravenous portable infusion pump at a rate of 5 ng PGE1 kg−1 ·  min−1 for 5 days a week, 6 h daily, over a total of 5 weeks) in ten patients (eight males, two females) on 123I-apo B-containing lipoprotein accumulation into the large arteries in vivo. Apo B-containing lipoprotein isolation was carried out by immunoaffinity chromatography and radiolabeling with the iodine monochloride method. 123I-apo B-containing lipoprotein accumulation was imaged and quantified by means of special computer software before and after 5 weeks of PGE1 therapy Results: PGE1 led to a significant decrease in maximal arterial apo B-containing lipoprotein retention. The mean decrease in the carotid and femoral arteries in type I lesions amounted to between 16.9% and 30.4%, and in type II lesions between 22.4% and 30.7%, 20 h after injection of radiolabeled apo B-containing lipoprotein. The type of arterial apo B-containing lipoprotein kinetic curves, however, remained unchanged. Conclusion: These findings indicate that PGE1 decreases the apo B-containing lipoprotein influx in the large arteries and the vascular cholesterol content, suggesting that PGE1 may lead to regression of lipid-rich lesions in human in vivo.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 42 (1992), S. 43-46 
    ISSN: 1432-1041
    Keywords: Isradipine ; hypertension ; platelet function ; prostaglandin system ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of treatment for eight weeks with isradipine 1.25 mg twice daily for 4 weeks and thereafter 2.5 mg twice daily for 4 weeks on ex vivo platelet function was investigated in 10 male hypertensive patients, aged 51 (6.1) y. Systolic and diastolic blood pressure, platelet aggregation in response to ADP, serum thromboxane B2 and β-thromboglobulin levels were significantly decreased at rest before exercise ergometry, during exercise and at rest after exercise. The platelet count, platelet sensitivity and the plasma levels of 6-oxo-prostaglandin F1α were not affected by isradipine. It is concluded that a compound that lowers blood pressure and inhibits platelet activation may be of clinical benefit in the routine treatment of hypertension.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 28 (1985), S. 713-716 
    ISSN: 1432-1041
    Keywords: co-dergocrine ; platelet function ; platelet proteins ; prostaglandins ; aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In 20 healthy volunteers double-blind randomized study was done to examine the effect of codergocrine (Hydergin) on platelet function. All the volunteers were pretreated with 3×1 placebo for 1 week, followed by the randomized study in which 10 volunteers each received drug or placebo for 6 weeks. Various platelet function parameters, such as the peripheral platelet count, plasma thromboxane B2, platelet sensitivity to the antigaggregatory prostaglandins PGI2, PGE1 and PGD2, ADP-in-duced aggregation, collagen-induced aggregation, the WU-test, the platelet proteins platelet factor 4 and β-thromboglobulin, malondialdehyde, circulating endothelial cells and the intracellular c-AMP level in platelets were examined. Treatment with co-dergocrine decreased platelet activity to a significant extent, as shown by a number of platelet function parameters, such as thromboxane B2, WU-test, β-thromboglobulin, platelet factor 4, malondialdehyde and ADP-induced aggregation. The findings suggest that co-dergocrine might be able to decrease platelet activity and improve interaction with the walls of to a blood-vessel significant degree.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 49 (1996), S. 515-520 
    ISSN: 1432-1041
    Keywords: Key words Prostaglandin E1 (PGE1) Hypercholesterolaemia; low-density lipoprotein (LDL) ; LDL receptor ; human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Previous in vitro radioligand binding data have shown that prostaglandin E1 (PGE1) increases the number and the binding affinity of low-density lipoprotein (LDL) receptors of the human liver. Experimental data in normo- and hypercholesterolaemic rabbits have confirmed these findings, showing a significant increase in LDL-binding to the liver in vivo after prolonged PGE1 therapy. Methods: This study aimed to confirm the experimental and animal data in human in vivo. 123I-LDL binding to the liver was quantified in vivo in patients suffering from peripheral vascular disease, seven of them with heterozygous familial hypercholesterolaemia (HC) and five with normal total plasma cholesterol, after PGE1 administration (5 ng⋅kg−1 ⋅min−1 ; 6 h daily for 5 days/week for 5 weeks). LDL uptake by the liver was quantified by single photon emission computer tomography (SPECT). Results: The amount of LDL trapped by the liver in normocholesterolaemics (45.6%) was significantly higher than in hypercholesterolaemics (22.0%). PGE1 induced an increase in liver LDL binding, which was more pronounced in HC (+ 38.2%) than in normocholesterolaemic patients (+ 8.11%).
    Type of Medium: Electronic Resource
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