Effect of Purine Co-Transmitters on Automatic Activity Caused by Norepinephrine in Myocardial Sleeves of Pulmonary Veins
- Authors: Karimova V.M.1, Pustovit K.B.1,2, Abramochkin D.V.1,2, Kuz’min V.S.1,2
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Affiliations:
- Department of Human and Animal Physiology, M. V. Lomonosov Moscow State University
- Department of Physiology, N. I. Pirogov Russian National Research Medical University
- Issue: Vol 162, No 5 (2017)
- Pages: 589-593
- Section: Physiology
- URL: https://journals.rcsi.science/0007-4888/article/view/238395
- DOI: https://doi.org/10.1007/s10517-017-3664-7
- ID: 238395
Cite item
Abstract
We studied the effect of extracellular purine nucleotides (NAD+ and ATP) on spontaneous arrhythmogenic activity caused by norepinephrine in myocardial sleeves of pulmonary veins. In pulmonary veins, NAD+ and ATP reduced the frequency of action potentials and their duration at regular type of spontaneous activity caused by norepinephrine. NAD+ and ATP lengthened the intervals between spike bursts at periodic (burst) type of spontaneous activity. In addition, ATP shortened the duration of spike bursts and the number of action potentials in the “bursts” caused by norepinephrine in the pulmonary veins. It was hypothesized that NAD+ and ATP attenuate the effects of sympathetic stimulation and when released together with norepinephrine from sympathetic endings in vivo, probably, reduce arrhythmogenic activity in myocardial sleeves of pulmonary veins.
About the authors
V. M. Karimova
Department of Human and Animal Physiology, M. V. Lomonosov Moscow State University
Author for correspondence.
Email: vm_karimova@mail.ru
Russian Federation, Moscow
K. B. Pustovit
Department of Human and Animal Physiology, M. V. Lomonosov Moscow State University; Department of Physiology, N. I. Pirogov Russian National Research Medical University
Email: vm_karimova@mail.ru
Russian Federation, Moscow; Moscow
D. V. Abramochkin
Department of Human and Animal Physiology, M. V. Lomonosov Moscow State University; Department of Physiology, N. I. Pirogov Russian National Research Medical University
Email: vm_karimova@mail.ru
Russian Federation, Moscow; Moscow
V. S. Kuz’min
Department of Human and Animal Physiology, M. V. Lomonosov Moscow State University; Department of Physiology, N. I. Pirogov Russian National Research Medical University
Email: vm_karimova@mail.ru
Russian Federation, Moscow; Moscow