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Inhibitory effect of vapiprost on contractile responses of isolated dog renal arteries to thromboxane A2 analogue, U46619. 1994
M Sakanashi, and
T Matsuzaki, and
K Noguchi, and
J Nakasone, and
T Itomine, and
M Uza, and
F Toyama, and
M Higuchi
Department of Pharmacology, School of Medicine, University of the Ryukyus, Japan.
1. Cumulative administrations of U46619, a thromboxane A2 analogue, and prostaglandin (PG) F2 alpha produced concentration-dependent contractions of isolated dog renal arterial preparations, which were significantly and concentration-dependently inhibited by vapiprost. 2. A bolus administration of U46619 or PGF2 alpha produced sustained contracture of these preparations, which was concentration-dependently relaxed by cumulative vapiprost. 3. Results indicate that vapiprost inhibits U46619- and PGF2 alpha-induced dog renal arterial contractions through antagonism for so-called TP receptors.
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