Abstract
To assess whether the cardiovascular effects induced by early blockade of bradykinin B2-receptors with Hoe 140 (D-Arg[Hyp3,Thi5,D-Tic7,Oic8]-bradykinin) are influenced by sex, Wistar rats of both sexes received the antagonist (300 nmol/d per kilogram body wt) or vehicle from 2 days to 7 weeks of age by subcutaneous injection and then by intraperitoneal infusion. Compared with control rats, Hoe 140-treated female rats showed higher systolic blood pressure levels at 7 and 9 weeks of age (125 +/- 2 versus 111 +/- 2 mm Hg and 132 +/- 3 versus 116 +/- 2 mm Hg, respectively, P < .05), whereas in male rats a difference was found at 7 weeks (122 +/- 4 versus 108 +/- 4 mm Hg, P < .05) but not at 9 weeks. At this stage, the mean blood pressure of Hoe 140-treated rats was higher than that of control animals, and this difference was more pronounced at 12 weeks in female rats (121 +/- 2 versus 100 +/- 3 mm Hg in control animals, P < .01) compared with males (116 +/- 3 versus 104 +/- 2 mm Hg in control animals, P < .05). After the first week of life, body weight gain was greater in Hoe 140-treated female rats than in control rats, whereas a group-difference was detected in male rats only after weaning. In Hoe 140-treated female rats, heart w...Continue Reading
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