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https://read.qxmd.com/read/9457484/partial-contribution-of-polyamines-to-the-relaxant-effect-of-17-alpha-estradiol-in-rat-uterine-smooth-muscle
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JOURNAL ARTICLE
M Gutiérrez, A I Fernández, M P Revuelta, B Cantabrana, A Hidalgo
1. The effects of 17 alpha-estradiol on KCl (60 mM), CaCl2 (30 microM to 10 mM) and vanadate (0.3 mM)-induced contractions in rat uterus have been assayed. Furthermore, the effect of 17 alpha-estradiol on calmodulin-stimulated cAMP-phosphodiesterase activity was also studied. 2. 17 alpha-estradiol relaxed the tonic contraction induced by KCl (60 mM) in a concentration-dependent way (IC50, 8.3 +/- 0.7 microM), and CaCl2 (0.1 to 10 mM) counteracted it. 3. CaCl2 (30 microM to 10 mM) produced concentration-dependent contraction of rat uterus in a calcium-free medium supplemented with 60 mM of KCl (EC50: 0...
January 1998: General Pharmacology
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