Shelf life (days): 730.0
Formulation: A solution in methyl acetate
Formal Name: (5E)-5-[(3aS,4R,5R,6aS)-hexahydro-5-hydroxy-4-[(1E,3S)-3-hydroxy-4-methyl-1-octen-6-yn-1-yl]-2(1H)-pentalenylidene]-pentanoic acid
Purity: ≥97%
Formula Markup: C22H32O4
Formula Weight: 360.5
CAS Number: 78919-13-8
Notes: Iloprost is an agonist of the IP receptor and the prostaglandin E2 (PGE2) receptor subtype EP1 and a derivative of PGI2.{8322,72436} It selectively binds to IP and EP1 receptors (Ki = 11 nM for both) over EP2, EP4, DP, FP, and TP receptors (Kis = 1,870, 284, 1,035, 619, and 6,487 nM, respectively) but also binds to the EP3 receptor (Ki = 56 nM).{8322} Iloprost increases cAMP levels in HEK293 cells expressing IP or EP3 receptors (EC50s = 0.37 and 27.5 nM, respectively) and increases calcium levels in HEK293 cells expressing the EP1 receptor (EC50 = 0.3 nM).{72436} It inhibits ADP-, thrombin-, and collagen-induced platelet aggregation in isolated human platelet-rich plasma (IC50s = 1.07, 0.71, and 0.24 nM, respectively).{3347} Iloprost (100 ng/kg per minute) increases the time to occlusive coronary artery thrombosis in a porcine model of electrically induced coronary artery thrombosis.{72437} Aerosolized administration of iloprost (130-1,300 ng/kg per minute) reduces right ventricular systolic pressure and reverses vascular remodeling in rats in a model of chronic pulmonary hypertension induced by the alkaloid monocrotaline (Item No. 16666).{72438} Formulations containing iloprost have been used in the treatment of pulmonary arterial hypertension and severe frostbite.
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