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MicroRNA miR-133a-3p Facilitates Adrenergic Proarrhythmic Ectopy in Rat Pulmonary Vein Myocardium by Increasing cAMP Content

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Bulletin of Experimental Biology and Medicine Aims and scope

Cardiac-specific microRNA miR-133a-3p modulates adrenergic signaling. Adrenergic receptors and their intracellular pathways are the key players in proarrhythmic ectopy derived from the myocardial sleeves of the pulmonary veins. We studied the effect of miR-133a-3p on ectopy induced by norepinephrine in myocardial tissue of rat pulmonary veins. Using microelectrode technique, we revealed facilitation of proarrhythmic pattern of spontaneous bursts of action potentials induced by norepinephrine in tissue preparations of the pulmonary veins isolated from rats in 24 h after injection of a transfection mixture containing miR-133a-3p (1 mg/kg) in vivo. According to ELISA data, the cAMP level in the pulmonary vein myocardium of rats receiving miR-133a-3p was 2-fold higher than in control animals. Bioinformatic analysis showed that mRNA of protein phosphatases and some phosphodiesterases are most probable targets of miR-133a-3p. The proarrhythmic effect of miR-133a-3p can be related to inhibition of the expression of phosphodiesterases accompanied by cAMP accumulation and increased intracellular β-adrenergic signaling.

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Authors and Affiliations

  1. Department of Human and Animal Physiology, Faculty of Biology, M. V. Lomonosov Moscow State University, Moscow, Russia

    V. S. Kuz’min, A. A. Kobylina, K. B. Pustovit, A. D. Ivanova & D. V. Abramochkin

  2. Scientific Research Laboratory of Electrophysiology, Pirogov Russian National Research Medical University, Ministry of the Health of the Russian Federation, Moscow, Russia

    V. S. Kuz’min & D. V. Abramochkin

Authors
  1. V. S. Kuz’min
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  2. A. A. Kobylina
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  3. K. B. Pustovit
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  4. A. D. Ivanova
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  5. D. V. Abramochkin
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Correspondence to V. S. Kuz’min.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 172, No. 12, pp. 664-668, December, 2021

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Kuz’min, V.S., Kobylina, A.A., Pustovit, K.B. et al. MicroRNA miR-133a-3p Facilitates Adrenergic Proarrhythmic Ectopy in Rat Pulmonary Vein Myocardium by Increasing cAMP Content. Bull Exp Biol Med 172, 671–675 (2022). https://doi.org/10.1007/s10517-022-05454-x

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  • DOI: https://doi.org/10.1007/s10517-022-05454-x

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