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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access December 25, 2011

Intranasal insulin affects adenyl cyclase system in rat tissues in neonatal diabetes

  • Alexander Shpakov EMAIL logo , Oksana Chistyakova , Kira Derkach , Irina Moyseyuk and Vera Bondareva
From the journal Open Life Sciences


The changes in hormone-regulated adenylyl cyclase (AC) signaling system implicated in control of the nervous, cardiovascular and reproductive systems may contribute to complications of diabetes mellitus (DM). We investigated the functional state of AC system in the brain, myocardium, ovary and uterus of rats with neonatal DM and examined the influence of intranasally administered insulin on the sensitivity of this system to biogenic amines and polypeptide hormones. The regulatory effects of somatostatin and 5-HT1BR-agonist 5-nonyloxytryptamine acting via Gi protein-coupled receptors were significantly decreased in DM and partially restored in insulin-treated rats. The effects of hormones, activators of AC, are changed in tissue- and receptorspecific manner, and intranasal insulin restored the effects rather close to the level in control. In insulin-treated non-diabetic rats, AC stimulating effects of isoproterenol and relaxin in the myocardium and of human chorionic gonadotropin in the ovaries were decreased, while the effects of hormones, inhibitors of AC, were increased. These data indicate that with intranasal insulin, Gi protein-mediated signaling pathways continue to gain strength. The obtained data on the influence of hormones on AC system in the brain, myocardium, ovary and uterus allow looking anew into the mechanisms of therapeutic effects of intranasal insulin.

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Published Online: 2011-12-25
Published in Print: 2012-2-1

© 2011 Versita Warsaw

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