代谢
依他钙肽不被CYP450酶代谢。依他钙肽在血液中通过可逆的二硫键交换与内源性巯基生物转化,主要形成与血清白蛋白的共价结合物。在需要血液透析的慢性肾病患者中,由于继发性甲状旁腺功能亢进,单次放射性标记剂量的依他钙肽给药后,生物转化产物的血浆暴露量大约是依他钙肽的5倍,且它们的时间浓度曲线与依他钙肽相似。
Etelcalcetide is not metabolized by CYP450 enzymes. Etelcalcetide is biotransformed in blood by reversible disulfide exchange with endogenous thiols to predominantly form conjugates with serum albumin. Following a single radiolabeled dose of etelcalcetide in chronic kidney disease patients with secondary hyperparathyroidism requiring hemodialysis, the plasma exposure of biotransformation products is approximately 5-fold higher than that of etelcalcetide and their concentration-time course parallels that of etelcalcetide.
来源:DrugBank