5(S),12(S)-DiHETE is a natural bioactive lipid derived from arachidonic acid . It is synthesized by glycogen-induced rabbit peritoneal polymorphonuclear leukocytes (PMNLs) incubated with AA. 5(S),12(S)-DiHETE can be produced by successive oxygenation of AA by 5-lipoxygenase (5-LO) in platelets and 12-LO in leukocytes. It can also be synthesized from 12(S)-HETE by 5-LO, in the presence of 5-LO activating protein (FLAP), activated with calcium ionophore. 5(S),12(S)-DiHETE is an epimer of leukotriene B4 that is weakly chemotactic for PMNL.
12(S)-HpETE(12-羟基二十碳四烯酸)是花生四烯酸在12-脂氧合酶(12-LOX)作用下生成的过氧化代谢产物。能剂量依赖性地刺激细胞内Ca2+释放(效用低于12-HETE),还能通过其对内皮细胞的作用参与血管张力的调节,诱导血管平滑肌细胞c-Fos和c-Jun蛋白的表达,增加AP-1( activating protein 1)的活性。