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Effects of anserine on the renal sympathetic nerve activity and blood pressure in urethane-anesthetized rats

M. Tanida, J. Shen, D. Kubomura, K. Nagai

. 2010 ; 59 (2) : 177-185.

Language English Country Czech Republic

Persistent link   https://www.medvik.cz/link/bmc10033307

Previous studies have demonstrated that central injection of L-carnosine (ß-alynyl-L-histidine), dipeptide synthesized in mammalian muscles, affects renal sympathetic nerve activity (RSNA) and blood pressure (BP) in anesthetized rats. In the present study, using urethane-anesthetized rats, we examined the dose-dependent effects of intravenous (IV) injection of various doses of anserine, dipeptide of similar structure to L-carnosine, on RSNA, BP and heart rate (HR). We found that injection of a low dose of anserine (1 µg) significantly suppressed RSNA, BP and HR. Conversely, a high dose (1000 µg) of anserine significantly elevated RSNA, BP and HR. Pretreatment with lateral cerebral ventricular (LCV) injection of thioperamide, a histaminergic H3-receptor antagonist, eliminated the effects of a low dose of anserine on RSNA, BP and HR. LCV injection of diphenhydramine, a histaminergic H1-receptor antagonist, abolished the effects of a high dose of anserine on RSNA, BP and HR. These findings suggest that anserine affects RSNA, BP and HR in a dose-dependent manner, and that the histaminergic nerve may be involved in the dose-different effects of anserine in rats.

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Lit.: 20

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