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- W2149356714 abstract "These experiments were designed to assess the interaction of bradykinin and its antagonist (Arg-Pro-Hyp-Gly-Phe-Ser-DPhe-Phe-Arg-trifluoroacetic acid) with the sympathoadrenal system. Three groups of male Wistar rats received 5-minute intra-arterial infusions of either dextrose (Group 1, n = 6), bradykinin, 250 micrograms/min (Group 2, n = 5), or bradykinin, 25 micrograms/min (Group 3, n = 4). Six other groups received a similar infusion of the bradykinin antagonist at 250 micrograms/min. They were either intact rats (Group 4, n = 10) or rats previously submitted to chemical sympathectomy (Group 5, n = 17), to adrenal enucleation (Group 6, n = 8), to combined alpha-adrenergic and beta-adrenergic blockade (Group 7, n = 7), to alpha 1-adrenergic receptor blockade (Group 8, n = 8), or to alpha 2-adrenergic receptor blockade (Group 9, n = 8). Bradykinin infusion produced a sustained fall in mean arterial pressure (MAP) in Groups 2 and 3 (by -48 +/- 3 and -36 +/- 7 mm Hg, respectively) associated with similar increases in plasma epinephrine levels (100-fold), and norepinephrine (sevenfold) as compared with Group 1. The bradykinin antagonist infusion in intact rats produced a 23 +/- 4 mm Hg rise in MAP associated with a sixfold increase in epinephrine and a twofold increase in norepinephrine. Group 5 rats with lower baseline catecholamine levels had an even larger MAP rise (30 +/- 6 mm Hg) accompanied by a rise in epinephrine and norepinephrine proportionally similar to that of intact animals.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2149356714 date "1988-06-01" @default.
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- W2149356714 title "Vascular and sympathoadrenal responses to bradykinin and a bradykinin analogue." @default.
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- W2149356714 doi "https://doi.org/10.1161/01.hyp.11.6.754" @default.
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