Journal
EUROPEAN JOURNAL OF PHARMACOLOGY
Volume 593, Issue 1-3, Pages 79-86Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejphar.2008.07.004
Keywords
petasites hybridus; vasodilatation; vascular smooth muscle cells; cardiomyocyte
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Funding
- Danish Medical Research Council
- Copenhagen University
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Eremophilanlactones isolated from roots of Petasites hybridus (L.) G.M. et Sch. (Asteraceae) and S-petasin have vasodilatory effects with pD(2)-log (EC50) Values of 6.01 +/- 0.08, 5.24 +/- 0.10, 4.74 +/- 0.13, and 5.43 +/- 0.06 for S-petasin, the (Z)-3-methylthioacrylic ester of 2 beta-hydroxy-8 beta H-7(11)-eremophilene-12,8-olide, the angelic ester of 2 beta-hydroxy-8 alpha H-7(11)-eremophilene-12,8-olide, and the angelic ester of 2 beta-hydroxy-8 beta H-7(11)-eremophilene-12,8-olide, respectively, in the mesenteric arteries. The pD2 values were somewhat lower for all compounds in aortic segments. The vasodilation was caused by a blockage of the voltage gated calcium channels. 5-petasin, (Z)-3-methylthioacrylic ester of 2 beta-hydroxy-8 beta H-7(11)-eremophilene-12,8-olide, and the angelic ester of 2 beta-hydroxy-8 alpha H-7(11)-eremophilene-12,8-olide displayed similar potencies in inhibiting DNA synthesis in cardiomyocytes and vascular smooth muscle cells. (C) 2008 Elsevier B.V. All rights reserved.
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