Urantide acts as a competitice urotensin-II(UT) antagonist, blocking contractions in the thoracic aorta. Selective and competitive urotensin-II (UT) receptor antagonist pK = 8.3). Blocks hU-II induced contractions in thoracic aorta ex vivo. Exhibits no effect on noradrenaline or endothelin 1-induced contraction or on acetylcholine-induced relaxation. Behaves as a partial agonist in a calcium mobilization assay (in CHO cells expressing hUT receptors).
Solubility:Ethanol (Very Slightly), Methanol (Slightly), Water (Slightly)
Melting Point:> 175°C (dec.)
Method for Determining Identity:Proton NMR Spectroscopic, F NMR Spectroscopic and Mass Spectrometric Analysis
Elemental Analysis:As Reported
Specific Rotation (c=0.1, Methanol):As Reported
Water Content (KF):As Reported
Storage and Stability:May be stored at RT for short-term only. Long-term storage is recommended at -20°C. Stable for 6 months after receipt. Hygroscopic, under inert atmosphere. For maximum recovery of product, centrifuge the original vial prior to removing the cap.