A Medicinal Chemistry-Driven Approach Identified the Sterol Isomerase EBP as the Molecular Target of TASIN Colorectal Cancer Toxins
作者:Panayotis C. Theodoropoulos、Wentian Wang、Albert Budhipramono、Bonne M. Thompson、Nikhil Madhusudhan、Matthew A. Mitsche、Jeffrey G. McDonald、Jef K. De Brabander、Deepak Nijhawan
DOI:10.1021/jacs.9b13407
日期:2020.4.1
TASIN (Truncated APC-Selective Inhibitors) compounds are selectively toxic to colorectal cancer cells with APC mutations, although their mechanism of action remains unknown. Here, we found that TASINs inhibit three enzymes in the post-squalene cholesterol biosynthetic pathway including EBP, DHCR7, and DHCR24. Even though all three of these enzymes are required for cholesterol biosynthesis, only inhibition
TASIN(Truncated APC-Selective Inhibitors)化合物对具有 APC 突变的结肠直肠癌细胞具有选择性毒性,但其作用机制尚不清楚。在这里,我们发现 TASIN 抑制角鲨烯后胆固醇生物合成途径中的三种酶,包括 EBP、DHCR7 和 DHCR24。尽管所有这三种酶都是胆固醇生物合成所必需的,但只有抑制最上游的酶 EBP 才能通过消耗下游甾醇导致癌细胞死亡,这一观察结果已通过 EBP 的基因沉默得到证实。DHCR7 或 DHCR24 的药理学抑制或基因沉默对细胞活力没有影响。通过使用光亲和探针产生化学结构和探针竞争之间的关系,我们确定了选择性抑制 EBP 或 DHCR7 的化合物。