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  • 1985-1989
  • 1975-1979  (2)
  • 1975  (2)
Material
Years
  • 1985-1989
  • 1975-1979  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 357 (1975), S. 201-207 
    ISSN: 1432-2013
    Keywords: Allantoin ; Uricase ; Kidney ; Clearance ; Micropuncture ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Renal excretion of allantoin was measured by tracer techniques. After injection of 2-C14 urate and H3 inulin, clearances of allantoin and inulin were measured and both proximal and distal tubules were micropunctured. In confirmation of earlier results 2-C14 urate injected into an intact animal is very rapidly converted to C14 allantoin: after 15 min more than 90% of urinary tracer is present as allantoin. It was further observed that 1) allantoin clearance is essentially identical with inulin clearance over a wide range of urine flows; 2) no net transport of allantoin occurs in either proximal or distal tubules. Clearly allantoin is handled by the rat kidney like inulin. The total excretion of filtered allantoin unlike that of filtered urate provides an easy and effective mechanism for animals possessing the enzyme uricase to dispose of their purine loads.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 261-264 
    ISSN: 1432-1440
    Keywords: Urat uptake ; erythrocyte ; hyperuricemia ; gout ; Harnsäureaufnahme ; Erythrocyt ; Hyperurikämie ; Gicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 19 Patienten mit primärer Hyperurikämie, 6 mit sekundärer Hyperurikämie, 17 mit primärer Gicht und 30 Kontrollpersonen wird die Aufnahme von 2-C14 Harnsäure in die Erythrocyten gemessen. Es zeigt sich, daß die Erythrocyten von Gichtpatienten signifikant weniger Harnsäure aufnehmen als die von Kontroilpersonen. Dagegen unterscheiden sich die primären und sekundären Hyperurikämiepatienten nicht signifikant von den Kontrollen. Der Unterschied in der Aufnahme von Harnsäure bei Erythrocyten von Gichtpatienten und Kontrollen betrifft hauptsächlich den Anfangsteil der Aufnahmekinetik. Es wird die mögliche pathophysiologische Bedeutung der verminderten Harnsäureaufnahme für das Entstehen der Harnsäurepräcipitationen bei Gicht diskutiert und auf die Möglichkeit hingewiesen, den Harnsäure-Tracer-Aufnahmetest als diagnostisches Hilfsmittel für die Früherkennung der Gicht anzuwenden.
    Notes: Summary The uptake of 2-C14 urate by erythrocytes was measured in 19 patients with primary hyperuricemia, 6 patients with secondary hyperuricemia, 17 patients with primary gout and 30 controls. The uptake of urate in patients with primary gout was significantly lower than in the controls. In contrast no such difference could be observed in patients with primary and secondary hyperuricemia. The uptake of labeled urate by erythrocytes from gouty patients is especially diminished in the early phase of the uptake kinetics. The possible relevance of this finding for the pathogenesis of urate precipitation in gout is discussed. Further, we consider the application of the tracer urate uptake by erythrocytes as an aid in the early diagnosis of gout.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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