Induction of enantio-selective apoptosis in human leukemia HL-60 cells by (S)-erypoegin K, an isoflavone isolated from Erythrina poeppigiana
作者:Kiyomi Hikita、Satomi Saigusa、Yuto Takeuchi、Haruka Matsuyama、Rina Nagai、Kuniki Kato、Tomiyasu Murata、Hitoshi Tanaka、Yogesh S. Wagh、Naoki Asao、Norio Kaneda
DOI:10.1016/j.bmc.2020.115490
日期:2020.6
Erypoegin K, an isoflavone isolated from the stem bark of Erythrina poeppigiana, has potent apoptosis-inducing effect on human leukemia HL-60 cells. Erypoegin K has a chiral carbon at the C-2'' position of its furan ring and naturally occurs as a racemic mixture of (S)- and (R)-isomers. In the present study, we semi-synthesized (RS)-erypoegin K from genistein and separated the optical isomers by HPLC
从Erythrina poeppigiana的茎皮中分离得到的异黄酮Erypoegin K对人白血病HL-60细胞具有有效的细胞凋亡诱导作用。Erypoegin K在呋喃环的C-2''位处具有手性碳,并且自然地以(S)-和(R)-异构体的外消旋混合物形式存在。在本研究中,我们从染料木黄酮半合成(RS)-erypoegin K,并使用手性色谱柱通过HPLC分离了光学异构体,以表征其凋亡诱导活性。通过分析caspase-3和caspase-9活化,核片段化和基因组DNA梯形形成来评估凋亡细胞的死亡。(S)-erypoegin K表现出独特的抗增殖和凋亡诱导活性,IC50值为90 nM,比其外消旋混合物(175 nM)低约50%。相比之下,(R)-异构体未显示诱导凋亡的活性。此外,仅在用(S)-erypoegin K处理的细胞中观察到甲基乙二醛在培养基中的积累。这些结果表明(S)-erypoegin