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- W2000570638 abstract "Arginine vasopressin (AVP) injected intracerebroventricularly (i.c.v.) in the nanogram range elicits increases in mean arterial blood pressure (MAP), heart rate (HR) and efferent sympathetic nerve activity (SpNA) via central V1 AVP receptor stimulation. In this study in conscious rats we investigated, whether the cardiovascular and sympathetic responses can be augmented by repeated central applications of AVP, as has been previously shown for the convulsive responses to higher i.c.v. doses of the peptide. The AVP-induced pressor (0.1 and 1.0 ng) and the SpNA (0.1 ng) responses were significantly enhanced by a second AVP challenge 24 h after the first injection. With higher doses of the peptide (3 ng), the blood pressure responses were not different between two subsequent injections, but barrel rotation occurred in 21% of the animals upon the second challenge. The pressor responses to a threshold i.c.v. dose of 1 ng angiotensin II (ANG II) were not enhanced upon a second ANG II challenge. Our results demonstrate that AVP, unlike ANG II, can sensitize central mechanisms leading to increased MAP and SpNA responses." @default.
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- W2000570638 date "1989-12-01" @default.
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- W2000570638 title "Sensitization to pressor effects by repeated central injections of vasopressin in conscious rats" @default.
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- W2000570638 doi "https://doi.org/10.1016/0006-8993(89)90113-3" @default.
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