Effects of Genistein, An Isoflavone Isolated fromGenista tridentata, on Isolated Guinea-Pig Ileum and Guinea-Pig Ileal Myenteric Plexus
- 1 August 1992
- journal article
- research article
- Published by Georg Thieme Verlag KG in Planta Medica
- Vol. 58 (04) , 314-316
- https://doi.org/10.1055/s-2006-961474
Abstract
The inhibitory action of the major constituent of Genista tridentata L. (Papilionaceae), 4′,5,7-trihydroxyisoflavone (genistein), on contractions induced by agonists and electrical field stimulation of smooth muscle was analysed. Genistein inhibited twitches evoked by electrical-stimulation of strips of guinea-pig ileum with an IC50 value of 34 µM. Genistein (34 µM) inhibited contractions of the guinea-pig ileum by several agonists in a non-selective, antispasmodic action and had no effect on inhibition of 3H-ACh release from ileal myenteric plexus. Genistein (34 µM) produces an increase in cAMP levels of guinea-pig ileum which resulted in a smooth muscle relaxation which leads us to think that there must be a blockade of its phosphodiesterase.Keywords
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