Major autacoids Arachidonic acid metabolites including: prostaglandins,thromboxanes,leukotrienes 5-hydroxytryptamine,5-HT,also named serotonin ·Bradykinin ·Endothelin ·Substance PMajor autacoids • Arachidonic acid metabolites including： prostaglandins, thromboxanes, leukotrienes • 5-hydroxytryptamine, 5-HT,also named serotonin • Bradykinin • Endothelin • Substance P