Riassunto
L'acido nicotinico stimola la liberazione di insulina da parte di isole isolate di topo, in rapporto alla concentrazione del farmaco, ma indipendentemente dell'apporto di glucosio. La nicotinamide ed i nucleotidi piridinici sono privi di effetto sulla liberazione dell'ormone. La 6-amino-nicotinamide inibisce la liberazione insulinica stimolata dal glucosio. Questi risultati vengono discussi in relazione all'importanza delloshunt dei pentoso-fosfati per la regolazione della secrezione insulinica.
Résumé
L'acide de nicotine stimule la libération d'insuline de la part d'îlots isolés de rat, par rapport à la concentration du médicament, mais indépendamment de l'apport de glucose. La nicotinamide et les nucléotides pyridiniques n'ont aucun effet sur la libération de l'hormone. La 6-amino-nicotinamide inhibe la libération d'insuline stimulée par le glucose. Ces résultats sont examinés par rapport à l'importance dushunt des pentose-phosphates pour la régularisation de la sécrétion insulinique.
Resumen
El ácido nicotínico estimula la liberación de insulina por parte de islas aisladas de ratón, en relación con la concentración del producto, pero independientemente de la aportación de glucosa. La nicotinamida y los nucleótidos piridínicos carecen de efecto sobre la liberacción del hormón. La 6-amino-nicotinamida inhibe la liberación de insulina estimulada por glucosa. Estos resultados se discuten en relación con la importancia delshunt de los pentosa-fosfatos para la regulación de la secreción insulínica.
Zusammenfassung
Nicotinsäure stimuliert glucoseunabhängig, aber dosisabhängig, die Insulinsekretion isolierter Mäuseinselnin vitro. Nicotinamid, wie auch die Pyridinnucleotide haben keine Wirkung, auf die Hormonabgabe, während 6-Aminonicotinamid die glucose-stimulierte Insulinsekretion hemmt. Die erhobenen Befunde werden im Zusammenhang mit der Bedeutung des Pentosephosphatshunts für die Regulation der Insulinsekretion diskutiert.
Summary
Nicotinic acid stimulates insulin output of isolated mice islets in correlation with the drug concentration but regardless of glucose supply. Nicotinamide and also the pyridine nucleotides were ineffective on the insulin output. 6-amino-nicotinamide inhibits the glucose-stimulated insulin release. The results are discussed in connexion with the significance of the pentose phosphate shunt for the regulation of insulin secretion.
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Hahn, HJ., Michael, R. Influence of nicotinic acid on insulin release in vitro. Acta diabet. lat 9, 87–96 (1972). https://doi.org/10.1007/BF01564541
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DOI: https://doi.org/10.1007/BF01564541