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  • 14C-l-Glutaminsäure  (2)
  • Acid Secretion  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 262 (1969), S. 428-440 
    ISSN: 1432-1912
    Keywords: Cats ; Gastric mucosa ; 14C-l-Glutamic acid ; Katzen ; Magenschleimhaut ; 14C-l-Glutaminsäure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. An Katzen wurden der Einbau und die Verteilung von 14C-l-Glutaminsäure in der Magenschleimhaut untersucht. 2. Radioaktivität wird 90 min nach der Injektion von 14C-l-Glutaminsäure besonders im Fundus, in geringerer Menge auch im Antrum gegenüber dem Blut angereichert. 18 Std nach der Injektion war ein Verteilungsgleichgewicht zwischen Blut und Antrum- bzw. Fundusschleimhaut vorhanden. 3. Autoradiographisch ließ sich radioaktives Material im Fundus vornehmlich im Bereich der größten Hauptzelldichte nachweisen, während die Belegzellen keine Markierung zeigten. In der Antrumschleimhaut war die Radioaktivität weitgehend gleichmäßig verteilt. 4. 90 min nach der Injektion befand sich der Hauptteil der extrahierbaren Radioaktivität in niedermolekularen, 18 Std nach der Injektion in höhermolekularen Strukturen. 5. In angereicherten Gastrinextrakten der Antrumschleimhaut ließ sich Radioaktivität nachweisen, was den Schluß zuläßt, daß exogen zugeführte 14C-l-Glutaminsäure in endogenes Gastrin eingebaut wird.
    Notes: Summary 1. The incorporation and distribution of 14C-l-glutamic acid in the gastric mucosa was investigated in cats. 2. 90 min after the i.v. injection of 14C-l-glutamic acid, radioactivity was accumulated in larger amounts in the fundic mucosa, than in the antral mucosa of the cat stomach. 18 hours after the injection the radioactivity was equally distributed between blood, antral and fundic mucosa. 3. Autoradiographs demonstrated a localization of radioactivity in the fundus mainly in the area of the chief cells, the parietal cells being unlabelled. In the antral mucosa the radioactivity was equally distributed. 4. Using a gel filtration technique, it was found that 90 min after the injection the bulk of the extractable radioactivity was associated with fractions having a molecular weight lower than that of the fractions with which it was associated 18 hrs after the injection. 5. After the first step of purification (gel filtration) radioactivity was demonstrated in biologically active gastrin fractions suggesting an incorporation of 14C-l-glutamic acid into the gastrin molecule.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 267 (1970), S. 170-176 
    ISSN: 1432-1912
    Keywords: Chicken ; Acid Secretion ; Histamine ; Gastrin ; Carbachol ; Huhn ; Säuresekretion ; Histamin ; Gastrin ; Carbachol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The effect of histamine, carbachol, pentagastrin and gastrin extracts of different organs (glandular stomach, gizzard, duodenum) on gastric acid secretion was investigated in unanaesthetized chickens with a gastric fistula. 2. On a molar basis, pentagastrin was three times as potent as carbachol and 12 times as potent as histamine. The dose of pentagastrin required for stimulation of gastric secretion in chickens was very much higher than in mammals. 3. Extracts from the glandular stomach, the gizzard and the duodenum were free from acid secretion stimulating activity. 4. It was concluded that gastric acid secretion in chickens is controlled by a mechanism other than gastrin.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 271 (1971), S. 142-148 
    ISSN: 1432-1912
    Keywords: Chicken ; Crop ; Acid Secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The contribution of the crop to gastric acid secretion was investigated in unanaesthetized chickens with a gastric fistula. 2. Basal secretion was enhanced by removal or distension of the crop and reduced by irrigating the crop with food suspension, acetylcholine, glycine or propyl alcohol as compared with phosphate buffer. 3. It was concluded that the crop is able to release stimulating and inhibiting impulses towards the glandular stomach. The stimulating impulses were elicited by mechanical, the inhibiting ones by chemical excitation.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 263 (1969), S. 450-461 
    ISSN: 1432-1912
    Keywords: Cats ; Histamine ; Gastrin-Tetrapeptide ; Vagus Stimulation ; 14C-l-Glutamic Acid ; Gastric Juice ; Pepsin ; Katzen ; Histamin ; Gastrin-Tetrapeptid ; Vagusreizung ; 14C-l-Glutaminsäure ; Magensaft ; Pepsin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. An Katzen wurde die Ausscheidung von Radioaktivität in den Magensaft nach i.v. Injektion von 14C-l-Glutaminsäure unter verschiedenen sekretorischen Reizen untersucht. 2. Radioaktives Material wird in Abhängigkeit vom verwendeten Sekretionsreiz in unterschiedlicher Menge ausgeschieden. 3. Die Menge ausgeschiedener Radioaktivität verlief parallel zur Pepsinausscheidung. 4. Lyophilisierter Magensaft mit hohem Pepsingehalt weist bei der Gelfiltration in den Fraktionen die höchste Radioaktivität auf, die auch am meisten Pepsin enthalten. 5. Aus den Versuchen wird geschlossen, daß 14C-Glutaminsäure in der Magenschleimhaut in Pepsin eingebaut und mit diesem in den Magensaft ausgeschieden wird.
    Notes: Summary 1. The effect of different gastric secretagogues on the secretion of radioactive material into the gastric juice after i.v. injection of 14C-l-glutamic acid was investigated in cats. 2. Radioactive material was secreted into the gastric juice in different quantities depending on the stimulus applied. 3. The amount of radioactivity secreted was in parallel with the secretion of pepsin. 4. Fractionation of freeze dried gastric juice of high pepsin content demonstrated a parallelism between radioactivity and pepsin. 5. It is concluded that 14C-l-glutamic acid is incorporated into the pepsin molecule and is secreted with it into the gastric juice.
    Type of Medium: Electronic Resource
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