Endothelin-1 is a vasoactive peptide produced by endothelial cells. En
dothelin-1 exerts potent vasoconstrictory effects upon vascular smooth
muscle cells, and it may play a role in the pathogenesis of several c
ardiovascular disorders such as atherosclerosis and ischemic condition
s. Besides the investigation of its biological effects, knowledge abou
t cellular mechanisms of the synthesis, signal transduction pathway(s)
and receptor-mediated actions on target cells is mandatory for the de
velopment of pharmacological strategies in the treatment of cardiovasc
ular disease. In this review cellular mechanisms of endothelial endoth
elin-1 synthesis and release are discussed.