the endothelium releases a number of vasoactive compounds , including the vasodilator prostaglandins , prostacyclin ( pgi2 ) and prostaglandin e2 ( pge2 ) and endothelium-derived relaxing factor ( edrf ) , which play an important role in the regulation of vascular tone in the microcirculation .
C0033554
prostaglandins
C0012472
prostaglandin e2