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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Inorganic chemistry 7 (1968), S. 2064-2067 
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 686 (1994), S. 143-148 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Prostaglandins 19 (1980), S. 649-650 
    ISSN: 0090-6980
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1998
    Keywords: Non-rotation of bowel ; Volvulus ; Colon ; Malrotation ; Intestinal obstruction in children ; Anomaly of mesenteric attachment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of non-rotation of the bowel is presented wherein volvulus of the colon occurred causing acute obstruction. Spontaneous reduction following a barium enema as well as the patient's history leads us to suspect that volvulus had occurred in the past and was responsible for the intermittent nature of the patient's symptoms. This type of volvulus is distinctly different from midgut volvulus and is a rare complication of the anomaly of intestinal rotation and fixation known as non-rotation of the bowel. Efforts should be made to study patients with malrotation anomalies at a time when they are acutely symptomatic so that intermittent volvulus such as shown here is not overlooked.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 63 (1985), S. 1048-1051 
    ISSN: 1432-1440
    Keywords: Reduced renal mass ; Glomerular hyperperfusion ; Proteinuria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Arterial blood pressure, 24 h urinary excretion, and glomerular filtration rate (GFR) in 24 patients with unilateral kidney were compared with an age and sex matched control group of healthy persons. Of the patients with unilateral kidney, 13 were uninephrectomized and 11 patients had a congenital unilateral kidney. The 24 h urinary protein excretion in patients with one kidney was significantly higher (630±51 mg/24 h) compared to the control group (206±36 mg/24 h). The arterial systolic and diastolic blood pressures and GFR did not differ in both groups. Furthermore, no differences were found between patients with unilateral kidneys following nephrectomy or renal agenesis. This study shows that mild proteinuria occurs in patients with unilateral kidney. An increased risk for deterioration in renal function or severe arterial hypertension was not detected in this investigation.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 813-823 
    ISSN: 1432-1440
    Keywords: Prostanoids ; Leukotrienes ; Glomerular Disease ; GFA ; Proteinurie ; Prostanoide ; Leukotriene ; Glomerulopathien GFR ; Proteinurie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eicosanoide sind Syntheseprodukte der Zyklooxygenase und Lipoxygenase, Enzymkomplexe, die in fast allen Körperzellen vorkommen und ihr Hauptsubstrat, die mehrfach ungesättigte Arachidonsäure (AS), verstoffwechseln. Prostaglandine (PG) E2, I2 und Thromboxan (Tx) A2 sind Zyklooxygenaseprodukte mesangialer und epithelialer Zellen des Glomerulus, die direkte und indirekte vasodilatatorische und vasokonstriktorische Effekte am Glomerulus ausüben. Vasodilatatorische Prostaglandine E2 und I2 sind verantwortlich für die Aufrechterhaltung der GFR bei kritischer renaler Perfusion. Diese Prostanoide (PGE2 und PGI2) vermitteln darüberhinaus aber auch die glomeruläre Hyperperfusion nach experimenteller Nierenablation und bei Patienten mit chronischen Glomerulopathien. Die Induktion verschiedener tierexperimenteller Glomerulonephritiden steigert die glomeruläre PG- und Txsynthese. Der stimulatorische Einfluß auf den vasokostriktorischen Metaboliten TxA2 ist ausgeprägter als auf die Synthese der vasodilatatorischen PGE2 und I2. Einige Befunde weisen darauf hin, daß die erhöhte glomeruläre TxA2 Produktion mitverantwortlich ist für die reduzierte GFR, die bei experimentellen Nephritiden beobachtet wird. Bei einer Reihe von Glomerulopathien des Menschen ist die Produktion vasodilatatorischer Prostaglandine gesteigert. Die Gabe eines Zyklooxygenasehemmers führt bei diesen Patienten zur Reduktion der Proteinurie. Neben hämodynamischen Effekten scheint die erhöhte vasodilatatorische PG Produktion bei diesen Patienten auch die Permselektivität der glomerulären Filtrationsbarriere zu beeinflussen. Hauptsyntheseorte für Lipoxygenaseprodukte sind Granulozyten und Monozyten. Pharmakologische Untersuchungen zeigen, daß Lipoxygenaseprodukte (Leukotriene) vasokonstriktorische Effekte am Glomerulus haben. Leukotriene beeinflussen darüberhinaus das Wachstum mesangialer Zellen in Kultur und erhöhen die Adhäsion von Monozyten an mesangiale Zellen. Sie können deshalb bei zellvermittelten Glomerulonephritiden von Bedeutung sein.
    Notes: Summary Prostanoids are local cyclooxygenase products, synthesized by mesangial and epithelial cells of the glomerulus as well as by a variety of inflammatory cells and platelets. Prostaglandins and thromboxane have direct vasodilatory and vasoconstrictory effects and can modulate glomerular function. Arachidonic acid, the main substrate for cyclooxygenase, can also be metabolized by the lipoxygenase pathway to leukotrienes, substances which are primarily synthesized in inflammatory cells. In several models induction of immunologic glomerular injury is associated with an increased glomerular formation of cyclooxygenase and lipoxygenase products. The changes in cyclooxygenase products have been shown to account for some hemodynamic changes found in some of these models. Increased renal prostanoid formation is also present in patients with glomerular disease. There is some evidence that increased renal PG-formation in patients with moderate glomerular disease regulates GFR and mediates proteinurie in some of these patients. Leukotrienes are chemotactive substances which modulate the function of inflammatory cells, stimulate the growth of mesangial cells, and constrict mesangial cells in culture. Thus, these compounds might be mediators in the induction of immune mediated glomerular disease.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 71 (1993), S. 830-833 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1440
    Keywords: Renale Hypotonie ; Reninmangel ; Natriumund Volumenverarmung ; Renal hypotension ; Renin depletion ; Sodium and volume deprivation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Arterial hypotension of renal origin occurred as consequence of low plasma renin activity in the presence of sodium and extracellular fluid volume depletion. Secretory insufficiency of the renin-producing juxtaglomerular cells and sodium and volume deprivation, simultaneously, were achieved by removing the “clamped” kidneys in renal hypertensive, sodium- and volume-depleted rats leaving in situ the contralateral kidneys deprived of renin during the preceding period of hypertension. It is suggested that renal hypotension after acute losses of sodium and extracellular fluid may also develop in patients with chronically depressed renin-angiotensin system.
    Notes: Zusammenfassung Eine arterielle Hypotonie renalen Ursprungs wurde als Folge einer niedrigen Plasma-Reninaktivität bei bestehendem Mangel an Natrium und extrazellulärer Flüssigkeit beobachtet. Als experimentelles Modell, an dem eine sekretorische Insuffizienz der Renin-produzierenden juxtaglomerulären Zellen und eine Natrium- und Volumenverarmung gleichzeitig erzeugt werden konnten, dienten vorher hypertone, Natrium- und Volumen-verarmte Ratten nach Entfernung der Drosselnieren und Zurücklassung der während der Hochdruckperiode Renin-verarmten contralateralen Nieren. Es wird angenommen, daß sich eine renale Hypotonie nach akuten Verlusten von Natrium und extrazellulärer Flüssigkeit auch bei Patienten mit chronisch supprimiertem Renin-Angiotensin-System entwickeln kann.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 57 (1979), S. 143-145 
    ISSN: 1432-1440
    Keywords: Indometacin ; Plasma-Reninaktivität ; Hypotonie ; Indomethacin ; Plasma Renin Activity ; Arterial Hypotension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary After a single oral dose of 4 mg/kg indomethacin (IDM) to sodium and volume depleted rats plasma renin activity (PRA) and systolic blood pressure fell significantly within four hours. In sodium repleted animals indomethacin did not change systolic blood pressure (BP) although plasma renin activity was decreased. Thus, indomethacin by inhibition of prostaglandin synthesis may diminish the blood pressure maintaining effect of the stimulated renin-angiotensin system in sodium and volume depletion.
    Notes: Zusammenfassung Nach einer einmaligen oralen Gabe von 4 mg/kg Indometacin kam es innerhalb von 4 h bei Natrium- und Volumenverarmten Ratten zu einem signifikanten Abfall der Plasma-Reninaktivität und des systolischen Blutdrucks. Bei normalen Ratten führte die Indometacingabe lediglich zur Erniedrigung der Plasma-Reninaktivität ohne Beeinflussung des arteriellen Blutdruckes. Es wird deshalb angenommen, daß Indometacin über eine Hemmung der Prostaglandinsynthese den Blutdruck stabilisierenden Effekt des Renin-Angiotensin-Systems bei Natrium- und Volumenverarmung, vermindern kann.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 55 (1968), S. 272-276 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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