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The effects of inhibitors of Rho- and tyrosine c-Src-kinases on serotonin-induced constrictions of the aorta and mesenteric artery in rats

  • Human and Animal Physiology
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Abstract

We found that the inhibitor of Rho-kinase fasudil selectively inhibited constriction of isolated rings of the aorta and mesenteric artery in rats in response to application of the agonists of 5HT2A-(DOI and TBC-2) and 5HT1A-receptors (8-OH-DPAT) and did not influence vasoconstriction induced by serotonin. We demonstrate for the first time that application of the agonists of 5HT2C-receptors (MK 212 and SCH 23390) did not influence the tone of “intact” vessels. The marked vasoconstrictory effect of the agonists of 5HT2C-receptors was observed in the vessels preconstricted due to angiotensin II or vasopressin. We found that the inhibitor of Rho-kinase did not influence negatively on MK 212 or SCH 23390-induced constriction of isolated rings of the aorta and mesenteric artery in rats. We suppose that, in the presence of fasudil, serotonin induces constriction of vessels through the interaction with 5HT2C-receptors and signal transduction from these receptors does not involve Rho-kinase activity. We found that fasudil attenuated vasoconstriction induced by norepinephrine and vasopressin by 40%. We demonstrated that tyrosine c-Src-kinase plays the most important role in signal transduction from 5HT-receptors because its effects are specific with relation to these receptors.

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Authors and Affiliations

  1. Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, ul. Baltiiskaya 8, Moscow, 125315, Russia

    L. M. Kozhevnikova, A. A. Moskovtsev & M. V. Mesitov

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  1. L. M. Kozhevnikova
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  2. A. A. Moskovtsev
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  3. M. V. Mesitov
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Correspondence to L. M. Kozhevnikova.

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Original Russian Text © L.M. Kozhevnikova, A.A. Moskovtsev, M.V. Mesitov, 2014, published in Izvestiya Akademii Nauk, Seriya Biologicheskaya, 2014, No. 5, pp. 500–509.

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Kozhevnikova, L.M., Moskovtsev, A.A. & Mesitov, M.V. The effects of inhibitors of Rho- and tyrosine c-Src-kinases on serotonin-induced constrictions of the aorta and mesenteric artery in rats. Biol Bull Russ Acad Sci 41, 452–460 (2014). https://doi.org/10.1134/S1062359014050069

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