Vasorelaxing effect of the potassium (K+)-channel opener pinacidil in isolated porcine ciliary arteries
Thomas Morf, Peili Zhu, Josef Flammer, Ivan O. Haefliger · Klinische Monatsblätter für Augenheilkunde · 2001 · Heft 05 · S. 338-340
Bibliografische Angaben
Zusammenfassung
Abstract PURPOSE The aim of this study was to investigate the vasorelaxing properties of pinacidil (a potassium-channel-opener) in isolated porcine ciliary arteries. METHODS Isometric contractions of isolated porcine ciliary arteries were measured with a myograph system. The vessels were first precontracted with the thromboxane A2 analog U 46619 (0.1 μM), and then exposed, in a cumulative manner, to increasing concentrations of pinacidil (1 nM - 100 μM). Relaxations have been expressed in percent of the maximal contraction evoked by U 46619 (0.1 μM). RESULTS Pinacidil showed a pronounced concentration-dependent…