[CAS NO. 73963-72-1]  Cilostazol (OPC-13013)

Cilostazol (OPC-13013) is a 2-oxo-quinoline derivative with antithrombotic, vasodilator, antimitogenic and cardiotonic properties. The vasodilatory and antiplatelet actions of cilostazol are due mainly to the inhibition of phosphodiesterase 3 (PDE3) and subsequent elevation of intracellular cAMP levels. Cilostazol inhibits platelet aggregation. Cilostazol also possesses the ability to inhibit adenosine uptake. Elevation of interstitial adenosine by cilostazol in the heart is shown to reduce increases in cAMP caused by the PDE3-inhibitory action of cilostazol, thus attenuating the cardiotonic effects. Cilostazol is reported to inhibit smooth muscle cell proliferation. Cilostazol relaxes vascular smooth muscle and causes vasodilatation. Cilostazol inhibits the cytokine-induced expression of monocyte chemoattractant protein-1 (MCP-1). Cilostazol reduced plasma triglycerides and raised plasma HDL-cholesterol .