代谢
LE(氯甲基17alpha-乙氧羰氧基-11beta-羟基-3-氧代雄甾-1,4-二烯)在人血浆中,通过受到影响的眼睛组织的给药部位,通过paraoxonase 1迅速水解其17beta-氯甲基酯功能,生成17beta-羧酸盐PJ-91代谢物和PJ-90代谢物。两个代谢物都被认为是无活性的。
Loteprednol etabonate (LE) is readily and extensively metabolized to two inactive metabolites, PJ-90 (Δ1-cortienic acid) and PJ-91 (Δ1-cortienic acid etabonate). Metabolism occurs locally in ocular tissues, and to the extent that loteprednol etabonate reaches the systemic circulation, likely the liver and other tissues into which it distributes. In particular, studies have demonstrated that LE (chloromethyl 17alpha-ethoxycarbonyloxy-11beta-hydroxy-3-oxoandrosta-1,4-diene) is rapidly hydrolyzed at the location of its 17beta-chloromethyl ester function by paraoxonase 1 in human plasma at the site of administration at the level of the affected eye tissue to the 17beta-carboxylate PJ-91 metabolite and PJ-90 metabolite. Both metabolites are considered inactive.
来源:DrugBank