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  • Electronic Resource  (2)
  • 1965-1969  (2)
  • Bromcyan  (1)
  • Permeability
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  • Electronic Resource  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 264 (1969), S. 476-493 
    ISSN: 1432-1912
    Keywords: Kinins ; Permeability ; Heat ; Inflammation ; Kinine ; Permeabilität ; Hitze ; Entzündung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The suboutis of rat paws heated (46,5° C) in situ has been perfused. Kinin activity could be demonstrated regularly in the fluid which was collected in ice. When the solutions were tested immediately after having passed the tissue, only some of the experiments yielded positive results. Native and125Jlabelled kininogen as well as kininogenase and kininase activities passed into the perfusates. The sensitivity to dextran and the kinin release on heating were, in contrast to recent reports, not correlated. 2. The release of the components of the kinin system approximately paralleled that of labelled human albumin. Their concentration rose until about 1 hour after the start of the heating. There was no priority of the components of the kinin system when compared with human albumin which can be regarded as permeability indicator. 3. Intravenously injected carboxypeptidase B, because of its lower molecular weight, entered the interstitial fluid more easily than did the plasma carboxypeptidase N. Its blood level decreased rapidly; but sufficient tissue concentrations could be maintained by intravenous infusions. Neither the volume nor the time dependence of the thermic edema changed during carboxypeptidase B-infusions. The same was true for infusions of trasylol, whereas phenylbutazone inhibited the edema significantly. Edema formed by short heating (30 sec, 55° C) was equally resistant to carboxypeptidase B. 4. In the skin and muscles of the heated rat paw, carbon particles mainly stained the capillary walls. This finding argues against a considerable involvement of “classical” mediators which should induce venular lesions. 5. Infusion of large amounts of bradykinin into the arterial supply did not imitate the thermic edema; neither has bradykinin been found in the perfusate of the subcutis. 6. In the light of these findings, a significant role of the kinin system in the thermic edema of the rat paw is to be doubted.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 258 (1967), S. 160-180 
    ISSN: 1432-1912
    Keywords: Bovine kininogen ; Kinin-yielding peptides ; Cyanogen bromide ; Enzymes ; Structure ; Kininogen vom Rind ; kininliefernde Peptide ; Bromcyan ; Enzyme ; Strukturaufklärung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Bromcyanbehandlung von hochgereinigtem Rinderserum-Kininogen, Rinderserum und Humanplasma liefert Fragmente, welche sehr geringe „direkte“ kininähnliche Aktivität aufweisen, aber mit kininfreilegenden Enzymen aktiviert werden können. Ein Carboxypeptidase B-Präparat spaltete die kininliefernde Gruppierung von Humanplasma zu ca. 40%, von Rinderserum zu ca. 20%, gereinigtes Kininogen dagegen nicht signifikant. 2. Nach Gelfiltration von Bromcyan-Kininogen an Sephadex G 50 wird die kininliefernde Gruppierung im Verhältnis von ca. 1:2 in einer hochmolekularen Fraktion niedriger spezifischer Aktivierbarkeit und einer niedermolekularen Fraktion hoher spezifischer Aktivierbarkeit wiedergefunden. Aus der niedermolekularen Fraktion entsteht unter dem Einfluß von Crotalus adamanteus-Gift Kinin-10, was auf N-terminale Position dieses Kinins hinweist; die hochmolekulare Fraktion liefert daneben auch Kinin-9. Aus der niedermolekularen Fraktion werden durch Chromatographie an Carboxymethylcellulose zwei Peptide erhalten, von denen das in größerer Menge vorhandene stärker basisch und stärker hydrophob, auch gegen Carboxypeptidase A resistenter ist (BrCN-Lacton) als das andere (BrCN-Carboxyl). Beide Peptide werden durch Crotalus adamanteus-Gift, Trypsin und Pankreaskallikrein aktiviert. 3. Mit Hilfe der quantitativen Aminosäurenanalyse, des chromatographischen und elektrophoretischen Verhaltens sowie des Edman-Abbaus vor und nach Einwirkung kininfreilegender Enzyme werden folgende Sequenzen ermittelt: BrCN-Lacton: Lys-(Kinin-9)-Ser-Val-GluNH2-Val-Homoserinlacton. BrCN-Carboxyl: Lys-(Kinin-9)-Ser-Val-GluNH2-Val-Homoserin. Sie stehen im Einklang mit der früher auf Grund des peptischen Abbaus angegebenen Struktur des kininliefernden Bereichs.
    Notes: Summary 1. Treatment of highly purified bovine serum kininogen, bovine serum and human plasma with cyanogen bromide yields fragments possessing very low “direct” kininlike activity; they, however, can be activated by kinin-releasing enzymes. A carboxypeptidase B preparation splits the kinin-yielding group of human plasma to about 40%, bovine serum to about 20%, purified kininogen not significantly. 2. On gel filtration (sephadex G 50) of BrCN-treated kininogen, the kinin yielding group is distributed in a relation of about 1:2 between a high molecular fraction of low specific activability and a low molecular fraction of high specific activability. Crotalus adamanteus venom produces from the low molecular fraction kinin-10, from the high molecular fraction kinin-9 besides kinin-10. The low molecular fraction consists of two peptides which are separable by chromatography on carboxymethyl cellulose: the more basic and hydrophobic peptide (called BrCN lacton) was present in higher amounts; it was more resistant against carboxypeptidase A than the other (BrCN-carboxyl). Both peptides were substrates for the kinin-releasing enzymes crotalus adamanteus venom, trypsin, and pancreatic kallikrein. 3. The following sequences have been deduced from quantitative amino acid analysis, from chromatographic and electrophoretic behaviour and from Edman degradation before and after incubation with kinin-releasing enzymes. BrCN-lacton: Lys-(kinin-9)-ser-val-gluNH2-val-homoserine lactone. BrCN-carboxyl: Lys-(kinin-9)-ser-val-gluNH2-val-homoserine. They are in accordance with the structure of the kinin-yielding sequence previously determined after peptic degradation of bovine kininogen.
    Type of Medium: Electronic Resource
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