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  • Thrombocytopenia  (2)
  • Blutdruckregulation  (1)
  • Calcitonin  (1)
  • Cimetidine  (1)
  • 1
    ISSN: 1432-1440
    Keywords: Cimetidine ; Pirenzepine ; Parathyroid hormone ; Calcitonin ; Cimetidin ; Pirenzepin ; Parathormon-Calcitonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In letzter Zeit wurde über den Langzeiteffekt von Cimetidin, eines Histamin2-Rezeptorantagonisten, erhöhte PTH Serumkonzentrationen beim sekundären1 und primären Hyperparathyroidismus2 zu senken, berichtet. Dabei wurde auch eine Verbesserung des klinischen Bildes beobachtet. Wir haben die Wirkung von Cimetidin und Pirenzepin auf den Plasmaspiegel von PTH und CT bei Patienten mit sekundären Hyperparathyroidismus in einem Kurzzeitversuch geprüft. Eine signifikante Senkung der PTH Serumkonzentration wurde mit Cimetidin nach 30 min für die Dauer von 30 min gesehen. Mit Pirenzepin zeigte sich erst 60 min nach der Infusion ein 60 min lange anhaltender signifikanter Abfall der PTH Serumkonzentration. Der Calcitonin Serumspiegel war nur mit Cimetidin signifikant senkbar.
    Notes: Summary Long-term administration of cimetidine, a histamine2 receptor antagonist, has been reported to normalize elevated parathyroid hormone (PTH) concentrations in patients with secondary [1] and primary hyperparathyroidism [2] and even to improve the clinical symptoms. We have compared the effect of cimetidine and pirenzepine on PTH and calcitonin (CT) plasma levels in a short-term trial on patients with secondary hyperparathyroidism. After cimetidine a significant effect on PTH was seen within 30 min lasting 30 min and after pirenzepine, within 60 min and lasting 60 min. The effect on CT was only significant after cimetidine.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 823-828 
    ISSN: 1432-1440
    Keywords: Diabetes mellitus ; Plasma norepinephrine ; Blood pressure regulation ; Diabetes mellitus ; Plasmanoradrenalin ; Blutdruckregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Verhalten von Blutdruck, Plus und Plasmanoradrenalin während verschiedener Stimulationsmanöver sympathisch nervöser Aktivität sowie das vaskuläre Reaktionsvermögen auf infundiertes Noradrenalin (50, 100 und 200 ng/kg−1/min−1,t=15 min) wurde bei 17 Diabetikern und 6 gesunden Probanden untersucht. Unterschieden wurden Diabetiker 1) ohne Zeichen autonomer Dysfunktion und ohne periphere Neuropathie (n=6), 2) ohne Zeichen autonomer Dysfunktion jedoch mit schwerer peripherer Neuropathie (n=6) und 3) mit autonomer Dysfunktion, mit (n=3) und ohne (n=2) peripherer Neuropathie. Während eines „Cold pressor tests“ (2 min), mechanischer Hautirritation (10 min) und Orthostase (10 min) zeigten Diabetiker ohne klinische Zeichen autonomer Dysfunktion ein den gesunden Kontrollpersonen vergleichbares Verhalten von Blutdruck, Plus und Plasmanoradrenalin, während Diabetiker mit autonomer Dysfunktion unabhängig vom Bestehen einer peripheren Neuropathie während der Orthostase, nicht jedoch während des „Cold pressor tests“ und mechanischer Hautirritation eine deutlich herabgesetzte Noradrenalinfreisetzung (P〈0.05) aufwiesen. Normalpersonen und Diabetiker ohne autonome Dysfunktion unterschieden sich bezüglich ihres Blutdruckverhaltens während Noradrenalininfusion nicht, während Diabetiker mit autonomer Dysfunktion auf die Verabreichung von exogenem Noradrenalin (200 ng/kg/min) mit einem gegenüber Normalpersonen verstärkten (P〈0.05) Blutdruckanstieg reagierten. Störungen der Noradrenalinfreisetzung und der adrenergen Blutdruckregulation scheinen somit, unabhängig vom Bestehen einer peripheren Neuropathie, nur bei Diabetikern mit klinischen Zeichen autonomer Dysfunktion aufzutreten. Der Nachweis derartiger Störungen gelingt jedoch nur bei Anwendung von Stimuli größerer Intensität wie Orthostase oder Infusion einer hohen Noradrenalindosis.
    Notes: Summary Changes in blood pressure (BP) and plasma norepinephrine (NE) following various stimuli of the sympathetic nervous system were studied in six healthy subjects and in 17 diabetic patients. The latter were subdivided in three groups: (1) six patients with neither peripheral neuropathy nor autonomic dysregulation, (2) six patients with severe peripheral neuropathy without autonomic dysregulation, and (3) five patients with autonomic dysregulation, three of whom suffered also from peripheral neuropathy. The following procedures were performed: (1) cold pressor test (2 min), (2) mechanical irritation of the skin by suction (0.75 kg/cm2, 10 min), (3) orthostasis (10 min), and (4) i.v. infusion of NE (50, 100, 200 ng kg−1 min−1 for 15 min each). Both the stimulated endogenous plasma NE levels and BP response to exogenous NE were the same in normal subjects, in diabetic controls and in diabetics with peripheral neuropathy without autonomic dysregulation. In contrast, diabetics with postural hypotension showed a less pronounced release of NE to standing (P〈0.05), but not to cold pressor test and mechanical skin irritation. Furthermore, they showed increased vasoreactivity to the highest dose (P〈0.05), but not to the lower doses of exogenous NE. Thus NE release and adrenergic BP regulation seem to be altered only in diabetics with clinical signs of autonomic dysregulation. These alterations can only be evaluated when patients are exposed to stimuli of higher intensity, such as orthostasis or infusion of a high NE dose.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1440
    Keywords: Posttransfusion purpura ; Thrombocytopenia ; Blood transfusion ; Platelet antibodies ; HLA antigens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirteen cases of posttransfusion purpura (PTP) which were diagnosed in Germany and Austria from 1977–1985 are described. All patients were women with a mean age of 58.6 years (range, 36–77 years). All but one had been pregnant and received blood transfusions 2 to 12 days prior to the onset of PTP. The thrombocytopenic purpura was always severe with a nadir of platelet counts below 10×109/l and lasted between 3 and 60 days. All patients recovered from PTP. Optimal therapy consisted of administration of high-dose IgG. Twelve of the 13 patients had developed platelet-specific Zwa antibodies (eight of them together with HLA antibodies), in one Zwa positive individual only HLA antibodies were detectable. Five of six HLA-DR typed patients carried DR3 which is considered an immunogenetic risk factor in PTP. Clinical awareness of this rare, but serious iatrogenic transfusion complication is prerequisite for prompt diagnosis and improved therapy.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0584
    Keywords: Key words Lupus anticoagulants ; Platelet antibodies ; Antiphospholipid antibodies ; Thromboembolism ; Thrombocytopenia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We have studied target platelet antigens in 22 patients with lupus anticoagulants and a primary antiphospholipid syndrome in order to determine whether any specificities of platelet autoantibodies are correlated with thromboembolism, and if these antibodies cross-reacte with phospholipids, which would suggest their role in the development of thromboembolic disease. Platelet counts were median 203×109/l, range 100–298×109/l. Platelet antibodies were found in six thrombocytopenic patients and in further nine patients. All these 15 patients had antibodies against GPIIb/IIIa, five patients against GPIb/IX, and six patients against GPIV. Anti-GPIb/IX and -GPIV occurred only in combination with anti-GPIIb/IIIa antibodies. There was no correlation between the presence of detectable platelet antibodies or any of their glycoprotein specificity and thrombocytopenia or the history of a thromboembolic disease. Eluates from platelets contained only GPIIb/IIIa reactivities, but neither anti-GPIb/IX nor anti-GPIV. None of the eluates contained lupus anticoagulant activity. In one case, the platelet eluates contained anti-GPIIb/IIIa and anticardiolipin IgG antibodies. These results suggest that in patients with a primary antiphospholipid syndrome the presence of platelet autoantibodies neither indicate a risk for thromboembolic disorder nor have lupus anticoagulant activity.
    Type of Medium: Electronic Resource
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