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  • 1
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In the case of 52 patients with rheumatoid arthritis (R.A.) and 23 patients with malignant tumors the „collagen-like protein“ (CLP) in serum was determined by the methode of Le Roy, Kaplan, Udenfriend and Sjoerdsma as also the collagen antibodies in serum by the antiglobulinconsumption test in accordance with Steffen, using neutral salt soluble collagen as antigen. Four groups of patients were found: Patients who had a normal CLP level in serum: 1. with R.A., 2. with malignant tumors, and on the other hand patients, with increasel CLP level in serum and 3. with R.A., 4. with malignant tumors. When the serum concentration of collagen antibodies was determined in all these groups, a significant elevation was only proven in the third group. In all cases of this group R.A. was shown to have activity of a high degree. This result ist discussed with regard to our present knowledge of pathogenesis of R.A.
    Notes: Zusammenfassung Bei 52 Patienten mit chronischer Polyarthritis und 23 Patienten mit malignen Tumoren wurden das CLP und die Kollagenantikörper im Antiglobulinkonsumptionstest unter Verwendung von neutralsalzlöslichem Kollagen bestimmt. Je nachdem, ob CLP-Spiegel oder Antiglobulinkonsumptions-Titer normal oder erhöht gefunden wurden, wurden Polyarthritiker und Tumorpatienten auf 8 Gruppen verteilt. Es fand sich eine auffällige, statistisch signifikante Häufung erhöhter CLP-Spiegel und gleichzeitig erhöhter Titer im Antiglobulinkonsumptionstest bei aktiven chronischen Polyarthritiden. Es wird diskutiert, unter welchen Bedingungen lösliche Kollagenpeptide bzw. CLP das Antigen für die im Antiglobulinkonsumptionstest nachgewiesenen Kollagenantikörper bei der chronischen Polyarthritis sein könnten.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 160 (1973), S. 307-316 
    ISSN: 1433-8580
    Keywords: Insulin secretion ; Cyclic AMP ; Analogs of cyclic AMP ; Insulinsekretion ; 3′,5′-AMP ; 3′,5′-AMP-Analoga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Außer Adenosin-3′,5′-monophosphat (3′,5′-AMP) wurde Guanosin-3′,5′-monophosphat (3′,5′-GMP) als zweites cyclisches Nucleotid-3′,5′-monophosphat im Organismus verschiedener Tierarten nachgewiesen. An Ratten wurde untersucht, ob diese Substanz ebenso wie 3′,5′-AMP an der Steuerung der Insulinsekretion beteiligt sein könnte. Die vorliegenden Resultate sprechen nicht für diese Möglichkeit. Während bei adrenalektomierten, mit einem Glucocorticoid substituierten Ratten nach i.v. Injektion von 20 mg/kg Dibutyryl-3′,5′-AMP oder Monobutyryl-3′,5′-AMP eine deutliche Steigerung der Insulinkonzentration im Serum des Pfortaderblutes nachweisbar war, wurde ein derartiger Effekt weder unter dem Einfluß von 20 mg/kg Dibutyryl-3′,5′-GMP noch gleicher Dosen der Monobutyrylderivate von bisher in der Natur nicht nachgewiesenen Cyclophosphaten (Inosin-3′,5′-monophosphat, Uridin-3′,5′-monophosphat) beobachtet.
    Notes: Summary Besides cyclic AMP (cAMP), a second cyclic nucleotide, cyclic GMP (cGMP), has been identified in tissues of several animal species. In rats it was investigated whether this nucleotide might be involved in the regulation of insulin secretion. The results obtained do not support this possibility. Whereas i.v. injection of 20 mg/kg body weight dibutyryl-cAMP or monobutyryl-cAMP was followed by an increase of serum insulin concentration in the portal vein blood of adrenalectomized, glucocorticoid treated rats, no similar effects could be measured under the influence of same doses of either dibutyryl-cGMP, or monobutyryl derivatives of cyclic IMP and cyclic UMP the natural occurance of which has not yet been shown.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1433-8580
    Keywords: Spontaneous diabetes mellitus in laboratory animals ; Chinese hamsters ; Insulin secretion ; Adenosine-3′,5′-monophosphate ; Sulfonylureas ; Spontandiabetes bei Versuchstieren ; Chinesische Streifenhamster ; Insulinsekretion ; Adenosin-3′,5′-monophosphat ; Sulfonylharnstoffe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei spontandiabetischen chinesischen Streifenhamstern besteht ein auf einerβ-Zelldegeneration beruhender Insulinmangel mit den sich daraus für den Kohlenhydrat- und Fettstoffwechsel ergebenden Konsequenzen (Hyperglykämie, pathologische Glucosetoleranz, Erhöhung der Gluconeogenese — u. a. erkennbar an einem Anstieg der Glucose-6-phosphatase-Aktivität in der Leber —, Anstieg der Konzentration freier Fettsäuren im Serum). Die stark herabgesetzte Ansprechbarkeit derβ-Zellen auf Glucose konnte durch eine hohe Dosis Glymidin-Natrium (250 mg/kg, p.o.) nicht verbessert werden, während nach i.p. Applikation von Glucagon (0,3 mg/kg), Isopropylnoradrenalin (0,5 mg/kg) oder Theophyllin (100 mg/kg) ein z. T. noch stärkerer Anstieg der Insulinkonzentration im Serum auftrat als bei gesunden Tieren. Der insulinfreisetzende Effekt geringerer Dosen von Glucagon (0,003 mg/kg) oder Isopropylnoradrenalin (0,03 mg/kg) war bei spontandiabetischen Tieren abgeschwächt oder aufgehoben. Bei streptozotocin-diabetischen Hamstern führten selbst 100 mg/kg Theophyllin nur zu einer geringen Erhöhung des Seruminsulins. Diese Befunde erlauben folgende Schlußfolgerungen: 1. Derβ-cytotrope Effekt von Glymidin-Natrium und anderen Sulfonylaminoverbindungen wird offensichtlich nicht durch Adenosin-3′,5′-monophosphat vermittelt. 2. Es bestehen grundsätzliche Unterschiede zwischen der erblichen und experimentell erzeugtenβ-Zelldegeneration dieser Tiere. 3. Bei spontandiabetischen Tieren scheint das Adenylatcyclasesystem derβ-Zellen vermindert erregbar zu sein.
    Notes: Summary Spontaneously diabetic Chinese hamsters are characterized by a lack of insulin caused by a degeneration of the pancreaticβ-cells resulting in disturbances of carbohydrate and lipid metabolism (hyperglycemia, abnormal glucose tolerance, increase of gluconeogenesis as demonstrated by an increase of liver glucose-6-phosphatase activity, increase of serum free fatty acid concentration). The reduced sensitivity of theβ-cells of spontaneously diabetic hamsters to stimulation by glucose could not be improved by a high dose of sodium glymidine (250 mg/kg, orally), whereas i.p. application of glucagon (0.3 mg/kg), isopropylnorepinephrine (0.5 mg/kg), or theophylline (100 mg/kg) resulted in a partially higher increase of serum insulin than in normal animals. The effect of lower doses of glucagon (0.003 mg/kg) or isopropylnorepinephrine (0.03 mg/kg) was reduced or abolished. In hamsters with streptozotocin-induced diabetes i.p. injection of 100 mg/kg theophylline only provoked a small increase of serum insulin. These results allow the following conclusions: 1. The insulin releasing effect of antidiabetic sulfonylurea and sulfonylpyrimidine compounds does not seem to be mediated by adenosine-3′,5′-monophosphate. 2. There are principle differences between the hereditary and experimentally inducedβ-cell lesion in Chinese hamsters. 3. There is some evidence for a reduced sensitivity of theβ-cell adenylate cyclase system to hormonal stimuli in spontaneously diabetic animals.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 247 (1971), S. 383-399 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay191Hg→191Au was investigated by measuring γ-ray spectra, conversion electron spectra, and coincidence spectra, as well as lifetimes in the second region. The parent isotope191Hg was produced by the reaction197Au (d, 8n) withE d =80 MeV. About 80 γ-transitions of this decay were observed. Multipolarities of the more intense transitions were determined. An isomeric state of 0.92±0.11 s half-life was found in191Au. A level scheme for191Au is suggested. The measured γ-transitions are attributed to the decay of a 13/2+ isomeric state of191Hg; its half-life was found to be 50.8 ±1.5 min. The core excitation model was used to discuss some features of the level structure in191Au.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ground state rotational bands in the deformed doubly-even rare earth nuclei158,160Er,164,166Yb, and168Hf have been observed in (α, 8n γ) reactions. The γ-spectra associated with these reactions were studied in-beam using conventional spectroscopic methods. In all five nuclei the nuclear moment of inertia of the ground state rotational states was found to increase abruptly as higher spin states were attained. In a plot of the moment of inertia as a function of the angular velocity all these five nuclei display “backbending” curves. Moreover, in158Er and166Yb, the curves after passing through a maximum bend subsequently downwards.
    Type of Medium: Electronic Resource
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