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Effect of Neuropeptide Y on Action Potential of Working Right Atrial Cardiomyocytes in Early Postnatal Ontogeny
A A Zverev1, T A Anikina1, N G Iskakov1
1Department of Human Health Protection, Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, Russia.
Abstract:
The effects of neuropeptide Y (10-9-10-6 M) on electrical activity of right atrial cardiomyocytes of rats aging 7, 21, and 100 days were examined in vitro. Neuropeptide Y affected the amplitude-temporal parameters of the action potential in these cells. It decreased the duration of repolarization phase in 7-day-old rats in concentrations of 10-8 and 10-7 M, in 21-day-old rats at 10-8 and 10-6 M, and in 100-day-old at 10-6 M. The data indicate elevation of total membrane potassium current under the action of neuropeptide Y.
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