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Mechanism of Calcium Channel Modulation by Dihydropyridine Agonists and Antagonists

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Cardiovascular Effects of Dihydropyridine-Type Calcium Antagonists and Agonists

Part of the book series: Bayer-Symposium ((BAYER-SYMP,volume 9))

Abstract

Single cardiac Ca channels exhibit three modes of gating, expressed as current records with brief openings occurring in bursts (mode 1), records with long-lasting openings and very brief closings that appear only rarely (mode 2), and records that lack openings because of channel unavailability (mode 0). The dihydropyridine Ca agonist Bay K 8644 enhances Ca channel current by promoting mode 2, while the Ca antagonists nitrendipine and nimodipine reduce the current by favoring mode 0.

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© 1985 Springer-Verlag Berlin Heidelberg

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Hess, P., Lansman, J.B., Tsien, R.W. (1985). Mechanism of Calcium Channel Modulation by Dihydropyridine Agonists and Antagonists. In: Fleckenstein, A., Van Breemen, C., Gross, R., Hoffmeister, F. (eds) Cardiovascular Effects of Dihydropyridine-Type Calcium Antagonists and Agonists. Bayer-Symposium, vol 9. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70499-4_3

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  • DOI: https://doi.org/10.1007/978-3-642-70499-4_3

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-70501-4

  • Online ISBN: 978-3-642-70499-4

  • eBook Packages: Springer Book Archive

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