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  • Arginine vasopressin  (1)
  • Arginine-vasotocin  (1)
  • Eiwei\bindung  (1)
  • 1
    ISSN: 1432-2013
    Keywords: Arginine-vasotocin ; Radioimmunoassay ; Avian osmoregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A radioimmunoassay for arginine-vasotocin (AVT), the antidiuretic principle in birds, was developed using the high cross-reactivity of AVT with an AVP antiserum raised in rabbits. This assay is specific for the measurement of AVT in serum of birds. The sensitivity and precision is such that serum AVT concentrations above 0.5 fmol/ml can be measured quantitatively. A serum AVT concentration of 5.1±1.4 fmol/ml was found in normally hydrated, fresh water adapted ducks with a serum osmolality of 293.7±2.2 mosmol/kg. When the same animals were acutely hydrated, no or〈0.5 fmol/ml AVT was present at an osmolality of 289.9±2.4 mosmol/kg. In salt water adapted ducks with a serum osmolality of 333.0±7.6 mosmol/kg, a serum AVT of 22.7±3.0 fmol/ml was found. When fresh water adapted ducks were hydrated and infused with different doses of AVT, a linear relationship between serum AVT and the amount infused was obtained. During AVT infusions, serum osmolality and urine flow rate were negatively correlated and urine osmolality was positively correlated with serum AVT.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 315 (1980), S. 83-84 
    ISSN: 1432-1912
    Keywords: Arginine vasopressin ; Brain stem ; Hypertensive rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The content of arginine vasopressin in the brain stem and neurohypophysis of adult spontaneously hypertensive rats was measured by radioimmunoassay and the values were compared to those measured in normotensive Wistar-Kyoto rats. In the brain stem of hypertensive rats, AVP content was decreased by 77% while neurohypophyseal AVP content was increased by 26%. The results demonstrate that brain stem AVP levels and neurohypophyseal AVP levels may change differentially and they are consistent with the possibility that brain stem AVP may be involved in altering cardiovascular reflex activity.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Clinical and experimental medicine 146 (1968), S. 329-335 
    ISSN: 1591-9528
    Keywords: Aldosterone ; Metabolism ; Protein-binding ; Renal clearance ; Aldosteron ; Stoffwechsel ; Eiwei\bindung ; Nierenclearance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im menschlichen Blutplasma wurde vermittels äquilibriumDialyse die Eiwei\bindung für Tetrahydroaldosteronglucuronid mit 35–39% und diejenige für 18-Aldosteronglucuronid mit 54–57% bestimmt. Auf Grund dieser Werte und der früher mitgeteilten renalen Clearance dieser beiden Aldosteronmetaboliten, welche die Eiwei\bindung nicht berücksichtigte [13], ergibt sich für das Tetrahydroaldosteronglucuronid eine renale Clearance im Bereich derjenigen des Inulins und für das 18-Aldosteronglucuronid eine solche im Bereich der PAHClearance.
    Notes: Summary In equilibrium dialysis with human blood plasma and human albumin the protein binding of tetrahydroaldosterone glucuronide was 35 to 39% and the protein binding of 18-aldosterone glucuronide was 54 to 57%. The “uncorrected” renal clearance values of these two aldosterone metabolites, as published bySiegenthaler et al. [13], were “corrected” for protein binding. So the renal clearance of tetrahydroaldosterone glucuronide is similar to the renal clearance of inulin, whereas the renal clearance of 18-aldosterone glucuronide lies in the range of the PAH clearance.
    Type of Medium: Electronic Resource
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