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Action of adenosine triphosphate on mast cells in normal and denervated skin

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Summary

Treatmentin vitro with adenosine triphosphate (ATP) causes degranulation of dermal mast cells in the skin of the rat's external ear. The magnitude of this effect increases with the concentration of ATP applied. In normal skin there is a marked increase in the proportion of degranulated mast cells with 2.5·10−6M ATP, while in skin denervated for 14 days this increase occurs with 1.25·10−6 M ATP. Thus, denervation is followed by hypersensitivity of the mast cells to ATP. This result is discussed in conjunction with other evidence that ATP may be a neurotransmitter substance released into the skin by impulses travelling antidromically in sensory axons.

Zusammenfassung

In vitro-Behandlung mit Adenosintriphosphat (ATP) verursacht eine Degranulation der dermalen Mastzellen in der äußeren Ohrhaut der Ratte. Die Degranulation nimmt mit der verwendeten ATP-Konzentration zu. In normaler Haut ist die Zahl der degranulierten Mastzellen bei einer Konzentration von 2,5·10−6 M ATP gesteigert, während in einer 14 Tage lang denervierten Haut diese Steigerung bei einer Konzentration von 1,25·10−6 M ATP vorliegt. Die gesteigerte Hypersensibilität der Mastzellen auf ATP ist somit von der Denervation abhängig. Diese Beobachtung unterstützt die Vermutung, daß ATP möglicherweise eine Neurotransmittersubstanz ist, die durch sensible Axonimpulse in der Haut freigesetzt wird.

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Kiernan, J.A. Action of adenosine triphosphate on mast cells in normal and denervated skin. Arch. Derm. Forsch. 251, 83–86 (1974). https://doi.org/10.1007/BF00561714

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  • DOI: https://doi.org/10.1007/BF00561714

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