24-dhcr

Triparanol (NSC-65345) 干扰 Hedgehog 信号分子的翻译后修饰以及其受体 PTCH1 的甾醇传感域，导致 Hedgehog 信号的下调。 Triparanol 抑制人类肿瘤生长，是一种具有高眼毒性的抗血脂剂。

Azacosterol is a diaza derivative of cholesterol which acts as a hypocholesteremic agent by blocking delta-24-reductase causing accumulation of desmosterol. Azacosterol acts as an inhibitor of 24-dehydrocholesterol reductase (24-DHCR), preventing the formation of cholesterol from desmosterol. Although it primarily acts to inhibit 24-DHCR, the drug also inhibits other steps in cholesterol biosynthesis. The antifertility effects of the drug in birds are mediated by inhibition of steroid hormone production, steroid hormones being synthesized from cholesterol.