Six patients with primary biliary cirrhosis (PBC) were treated with a daily oral dose of 600 mg rifampicin for 2 weeks to induce the hepatic metabolism of drugs and bile acids. On rifampicin 5 of 6 patients experienced a pronounced decrease of their pruritus. In all patients the oxidative cytochrome P-450 dependent drug metabolism was induced as shown by an increase of antipyrine-clearance from 36.3 +/- 8.8 to 80.6 +/- 20.1 ml/min and an enhanced urinary excretion of 6-beta-hydroxycortisol from 454 +/- 1.99 to 1607 +/- 362 micrograms/24 h. Furthermore, in all 6 patients the serum alkaline phosphatase declined. In the 3 cholestatic patients (bilirubin greater than 1.0 mg/dl) the serum concentration of total and conjugated bile acids was strikingly reduced. Thus, rifampicin is an inducer of hepatic metabolism in PBC-patients, ameliorates the pruritus and can lower serum concentrations of alkaline phosphatase and bile acids.
Reconstructive surgery for pediatric RVH yields good results at every age and every type of lesion. However, these children should be followed up closely and to avoid early cardiovascular disease and death in later life, surgery should not be delayed.
Bojar, Dreyfürsl, Balzer, Staib and Wittliff: Oestrogen-binding components in human renal cell carcinoma 521 Summary: Specific binding-of [ 3 H]oestradiol-17j3 by the cytosol fraction of human renal cell carcinoma was studied. The binding reaction displayed marked ligand specificity and high affinity of binding. Unlabelled oestradiol, oestriol and oestrone inhibited the binding of [ 3 H]oestradiol-17|3 to the cytosol binding sites, whereas all other steroids tested turned out to be only weak or insignificant competitors for the oestrogen binding sites. Scatcliard analyses suggested the existence of a single class of binding sites. The dissociation constant of the oestradiol-binder complex was found to be 2.51 ± 0.75 10" 9 mol/1. The number of binding sites was limited (17.5 ± 3.8 fmoles per mg of cytosol protein). Sucrose gradient centrifugation revealed these binding components to be macromolecules, either displaying a complex sedimentation pattern (peaks at 3.5S, 4S, 5.7S and, in addition, high molecular weight aggregates) or sedimenting in the 4 S region alone. By agar gel electrophoresis it could be demonstrated that the oestradiol-binding components migrated into the receptor region of the gel. Binding of [ 3 H]oestradiol-17j3 to these entities was markedly reduced, when the cytosol was heated (60 min at 45°C) prior to the reaction with the labelled hormone. Since the specific binding components exhibit properties of oestradiol receptors in target tissues, a direct effect of oestradiol on human renal cell carcinoma is suggested. Ostrogefcbindende Komponenten in hypernephroiden Karzinomen des MenschenZusammenfassung: Die spezifische Bändung von [ 3 H]Östradiol-17)3 durch die Cytosolfraktion hypernephroider Nierenkarzinome des Menschen wurde untersucht. Die Bindungsreaktion zeigte eine ausgeprägte Spezifität und hohe Affinität. Unmarkiertes Östradiol, Östriol und Östron hemmten die Bindung von [ 3 H]Östradiol-17|8, während alle übrigen getesteten Steroide sich nur als schwache bzw. nicht signifikante Kompetitoren erwiesen. Scatchard-Analysen deuten auf nur eine Klasse von Bindungsstellen hin. Die Dissoziationskonstante des Östradiol-Binderkomplexes betrug 2,51 ± 0,75 nmol/1. Die Zahl der Btadungsstellen war limitiert (17,5 ± 3,8 fmol/mg Cytosolprotein). Saccharosegradientenzentrifugation zeigte, daß diese Bindungskomponenten Makromoleküle waren. Das Sedimentationsprofil war entweder komplex (Maxima bei 3,5S, 4S, 5,7S und zusätzlich hochmolekulare Aggregate) oder zeigte nur ein Maximum in der 4 S=Region. Durch Agarelektrophorese konnte demonstriert werden, daß die östradiolbindenden Komponenten in die Rezeptorregion des Gels wanderten. Die Bindung des tritiierten Hormons an diese Moleküle nahm erheblich ab, wenn das Cytosol vor der Reaktion mit dem radioaktiv markierten Östradiol erhitzt wurde (60 min bei 45°C). Da die spezifischen Bindungskomponenten Eigenschaften von Östradiolrezeptoren in Zielorganen haben, wird eme direkte Wirkung von Östradiol auf hypernephioide Karzinome des Menschen erwartet.
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