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- W2038965513 abstract "Female sex hormones are implicated in the modulation of reactivity of a wide range of blood vessels under physiological as well as pathological conditions. Migraine, a neurovascular syndrome, is 3 times more prevalent in women during their reproductive period than in men.This study sets out to investigate the effects of the female sex steroids, 17beta-estradiol and progesterone (separately and in combination) on vasoactive responses to calcitonin gene-related peptide (CGRP), acetylcholine, and 5-hydroxytryptamine (5-HT) in rat isolated mesenteric, caudal, and basilar arteries.Female Sprague-Dawley rats were ovariectomized (Day 0) and 7 days later subcutaneously implanted with pellets releasing over a 21-day period 17beta-estradiol (0.25 mg), progesterone (50 mg), their combination, or placebo. On days 25-28, the animals were killed, arteries isolated and mounted in Mulvany myographs, and cumulative concentration response curves to CGRP, acetylcholine, and 5-HT were constructed.The relaxant responses to CGRP were significantly potentiated in mesenteric and caudal arteries from rats treated with 17beta-estradiol as compared to the placebo-treated rats. Acetylcholine-induced relaxations were potentiated in the caudal artery from rats treated with the combination of 17beta-estradiol and progesterone, as compared to that from placebo-treated rats. The 5-HT-induced contractions in the 3 arteries were not significantly different in efficacy or potency.Our results show that 17beta-estradiol potentiates CGRP-induced relaxations in the mesenteric and caudal arteries, while the combination treatment enhances acetylcholine-induced relaxations in the caudal artery. Although these in vitro experiments have been carried out in rats and a direct extrapolation to migraine in humans is not possible, our results may provide a new avenue to study the effects of sex steroids on vascular reactivity." @default.
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- W2038965513 date "2006-10-02" @default.
- W2038965513 modified "2023-10-18" @default.
- W2038965513 title "Effects of Female Sex Hormones on Responses to CGRP, Acetylcholine, and 5-HT in Rat Isolated Arteries" @default.
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- W2038965513 doi "https://doi.org/10.1111/j.1526-4610.2006.00596.x" @default.
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