Endothelins(ETs) are composed of 21-aminoacids produced by endothelial cells and considered to be potent vasoconstrictor. Recent studies found that they could not only induce the angiogenesis, mitosis and differentiation, but also act the role of cytokines. Previous studies have identifi ed three isoforms of ET(ET-1, ET-2 and ET-3), which are involved in a variety of physiological and pathological processes. ET-1 is most potent one among ETs, whereas ET-3 is the weakest once. ET peptides exhibit their funct...