Alterations in the Wnt/β-catenin pathway are associated with the development and progression of human prostate cancer. Decursin, a pyranocoumarin isolated from the Korean Angelica gigas root, inhibits the growth of androgen-independent human prostate cancer cells, but little is known about its mechanism of action. Using a cell-based screen, we found that decursin attenuates the Wnt/β-catenin pathway. Decursin antagonized β-catenin response transcription (CRT), which was induced with Wnt3a-conditioned medium and LiCl, by promoting the degradation of β-catenin. Furthermore, decursin suppressed the expression of cyclin D1 and c- myc , which are downstream target genes of β-catenin and thus inhibited the growth of PC3 prostate cancer cells. In contrast, decursinol, in which the (CH3)2–C=CH–COO–side chain of decursin is replaced with–OH, had no effect on CRT, the level of intracellular β-catenin, or PC3 cell proliferation. Our findings suggest that decursin exerts its anticancer activity in prostate cancer cells via inhibition of the Wnt/β-catenin pathway.
Wnt/β-catenin信号通路的改变与人类前列腺癌的发生和发展有关。Decursin是从韩国大独活根中分离出来的一种
吡喃
香豆素,能抑制雄激素非依赖性人前列腺癌细胞的生长,但其作用机制知之甚少。我们通过细胞筛选发现Decursin能减弱Wnt/β-catenin信号通路活性。Decursin通过促进β-catenin的降解,抑制了由Wnt3a条件
培养基和
氯化锂诱导的β-catenin反应转录因子。此外,Decursin还抑制了β-catenin下游靶
基因如Cyclin D1和c-myc的表达,从而抑制了
PC3前列腺癌细胞的生长。相反,Decursinol是Decursin中(
CH3)2-C=CH-COO-侧链被-OH取代后的产物,对β-catenin反应转录因子、细胞内β-catenin
水平或
PC3细胞增殖均无影响。我们的研究结果表明Decursin通过抑制Wnt/β-catenin信号通路在前列腺癌细胞中发挥其抗癌活性。