Synthesis and Biological Activity of 1α,2α,25-Trihydroxyvitamin D<sub>3</sub>: Active Metabolite of 2α-(3-Hydroxypropoxy)-1α,25-dihydroxyvitamin D<sub>3</sub> by Human CYP3A4
作者:Masashi Takano、Saori Ohya、Kaori Yasuda、Miyu Nishikawa、Akiko Takeuchi、Daisuke Sawada、Toshiyuki Sakaki、Atsushi Kittaka
DOI:10.1248/cpb.c13-00646
日期:——
Our previous studies revealed that recombinant human CYP3A4 converted 2α-(3-hydroxypropoxy)-1α,25-dihydroxyvitamin D3 (O2C3), which was a more potent binder to vitamin D receptor (VDR) than the natural hormone, 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3, 1), to 1α,2α,25-trihydroxyvitamin D3 (2). Here, we synthesized 2 using the Trost Pd-mediated coupling reaction between an A-ring precursor and a CD-ring bromoolefin and evaluated its preliminary biological activity. We found that metabolite 2 from O2C3 was still active as a VDR ligand while maintaining human VDR binding affinity (27.3% of 1α,25(OH)2D3) and HL-60 cell differentiation activity (62% of 1α,25(OH)2D3).
我们之前的研究发现,重组人 CYP3A4 可将 2α-(3-羟基丙氧基)-1α,25-二羟维生素 D3(O2C3)转化为 1α,2α,25-三羟维生素 D3(2),而 O2C3 与维生素 D 受体(VDR)的结合力比天然激素 1α,25-二羟维生素 D3(1α,25(OH)2D3, 1)更强。在此,我们利用特罗斯特钯介导的 A 环前体与 CD 环溴烯烃的偶联反应合成了 2,并对其生物活性进行了初步评估。我们发现,来自 O2C3 的代谢物 2 仍具有 VDR 配体的活性,同时保持了人类 VDR 结合亲和力(1α,25(OH)2D3 的 27.3%)和 HL-60 细胞分化活性(1α,25(OH)2D3 的 62%)。