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  • 1
    ISSN: 1432-0533
    Keywords: S-100 Protein ; 2′,3′-Cyclic nucleotide 3′-phosphohydrolase ; Human brain tumors ; Tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Biopsy specimens from 23 human brain tumors have been analyzed for the nervous system specific protein S-100 and the membrane-associated enzyme 2′,3′-cyclic nucleotide 3′-phosphohydrolase (CpNase). Biopsy specimens from an additional seven brain tumors were tested for either S-100 or CpNase alone. All astrocytomas and glioblastomas tested were found to contain S-100 and CpNase although there does not appear to be a strong correlation between the levels of these two markers in the 14 such tumors assayed for both. S-100 levels varied over a 19-fold range while CpNase varied over a 835-fold range. Postoperative survival in the astrocytoma and glioblastoma patients showed only a weak correlation with either tumor CpNase or S-100 levels. Two acoustic neurinomas, two oligodendrogliomas, one mixed glioma, and one choroid plexus papilloma were also assayed and found to have detectable levels of both S-100 and CpNase with the acoustic neurinomas and the mixed glioma having relatively high levels of each marker. All six meningiomas tested had low levels of CpNase. S-100 assays in three benign meningiomas were negative, while low levels of this protein were found in the one malignant meningioma tested. Tissue cultures were grown out from biopsy specimens of additional human brain tumors and tested at confluency for S-100. Of 15 astrocytoma and glioblastoma cultures tested, three had easily detectable amounts of S-100, two appeared to contain trace levels and ten were negative. The two acoustic neurinoma cultures tested were positive for S-100 while all three oligodendroglioma cultures were negative.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Adrenocorticotropes Hormon ; Mineralocorticoid-Hormone ; Renin ; Natrium ; Blutdruck ; Kinder ; Adrenocorticotropic hormone ; Mineralocorticoid hormones ; Renin ; Sodium ; Blood pressure ; Children
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effect of a 5 day ACTH test (40 U/24 h) on plasma aldosterone (aldo), deoxycorticosterone (DOC), plasma renin activity (PRA) and urinary excretion of aldosterone-pH1-conjugate (pH-1-aldo) and tetrahydro-DOC (TH-DOC) was investigated in 8 normotensive children (group I), 8 patients with hypertension of unknown origin (group II), and 4 hypertensive children with dexamethasone suppressible hyperaldosteronism (DSH) (group III). Changes in blood pressure and sodium balance were studied in all groups. Under baseline conditions there was no hormonal difference between group I and II. In contrast, the children in group III had a suppressed PRA and a 1.5–2 fold elevation of aldo and DOC. Plasma DOC and urinary THDOC increased continuously 10–50 fold in all groups during the ACTH test. Aldo rose transiently 2–4 fold on the first day of ACTH and fell subsequently below baseline levels in group I and II. The children with DSH (group III), however, showed an unusual, sustained aldo stimulation with ACTH. PRA decreased significantly after ACTH in group I and II. Sodium retention and an elevation of blood pressure were found in all groups during ACTH administration. The highest blood pressure rise was observed in group III (from 124/72 to 139/90 mm Hg). The blood pressure response to ACTH was partly sodium dependent. Although aldo and DOC and sodium retention may contribute to the ACTH induced blood pressure elevation, other factors must play a role.
    Notes: Zusammenfassung Der Einfluß einer 5tägigen ACTH-Behandlung (40 U/24 h) auf Plasma-Aldosteron (Aldo), Deoxycorticosteron (DOC), Plasma-Reninaktivität (PRA), auf die Ausscheidung des Aldosteron-pH-1 Conjugates (pH-1-aldo) und auf Tetrahydro-DOC (TH-DOC) wurde untersucht in Gruppe I: acht normotensiven Kindern; Gruppe II: acht Patienten mit Bluthochdruck unklarer Genese; Gruppe III: vier hypertensiven Kindern mit Dexamethason-supprimierbarem Hyperaldosteronismus (DSH). Änderungen des Blutdruckes und der Natriumbilanz wurden in allen Gruppen untersucht. Ohne Behandlung bestand kein Unterschied zwischen den Gruppen I und II. Die Kinder der Gruppe III hingegen zeigten erniedrigte PRA und eine 1,5–2fache Erhöhung des Aldo und DOC. Plasma-DOC und TH-DOC im Urin stiegen kontinuierlich auf das 10–50fache in allen Gruppen während des ACTH-Tests an. Aldo war am 1. Tag des Tests vorübergehend um das 2–4fache erhöht und fiel anschließend unter die Ausgangswerte in den Gruppen I und II. Die Kinder mit DSH (Gruppe III) zeigten eine ungewöhnliche, anhaltende Stimulation des Aldo unter ACTH-Behandlung. PRA war in den Gruppen I und II signifikant erniedrigt. Natriumretention und Anstieg des Blutdruckes wurden in allen Gruppen während des ACTH-Tests festgestellt. Die höchsten Blutdruckanstiege (von 125/72 auf 139/90) wurden in Gruppe III beobachtet. Das Ansprechen des Blutdruckes auf ACTH war zum Teil abhängig vom Natrium. Obgleich Aldo, DOC und Natriumretention wahrscheinlich zu dem ACTH-induzierten Blutdruckanstieg beitragen, müssen noch weitere Faktoren zu dessen Entstehung beitragen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 168 (1975), S. 96-103 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 203 (1980), S. 236-243 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 167 (1975), S. 287-293 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 164 (1974), S. 583-589 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 103 (1963), S. 461-468 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 83 (1959), S. 456-471 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 101 (1963), S. 335-341 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 85 (1978), S. 966-975 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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