Summary
Dependence of nicotine-induced noradrenaline and neuropeptide Y release on extracellular calcium, potassium, and pH has been investigated in isolated perfused guinea pig hearts. Noradrenaline and neuropeptide Y were determined by high pressure liquid chromatography and by a specific radioimmunoassay, respectively. Nicotine (1–100 µmol/1) induced a concentration dependent release of both sympathetic transmitters. The release was absolutely dependent on the extracellular presence of calcium. Reduction of extracellular potassium resulted in a markedly increased overflow of noradrenaline and neuropeptide Y. A rise of potassium above physiological levels caused a suppression of the release. Likewise, a rise of extracellular proton concentrations caused a reduction of noradrenaline and neuropeptide Y release.
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© 1991 Birkhäuser Verlag Basel
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Richardt, G., Haass, M., Brenn, T., Schömig, E., Schömig, A. (1991). Nicotine-Induced Release of Noradrenaline and Neuropeptide Y in the Heart: Dependence on Calcium, Potassium, and pH. In: Adlkofer, F., Thurau, K. (eds) Effects of Nicotine on Biological Systems. APS Advances in Pharmacological Sciences. Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-7457-1_28
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DOI: https://doi.org/10.1007/978-3-0348-7457-1_28
Publisher Name: Birkhäuser Basel
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