Discovery of diverse sesquiterpenoids from Magnolia grandiflora with cytotoxic activities by inducing cell apoptosis
作者:Shuangyu Xu、Yunyan Tang、Yanan Li、Jue Yang、Wei Gu、Xiaojiang Hao、Chunmao Yuan
DOI:10.1016/j.bioorg.2023.106707
日期:2023.10
a rare 5,6-seco-guaiane type sesquiterpene and its possible biogenic precursor is presumed to be compound 20. Subsequent structural modification for compound 28 led to 21 derivatives, among which 15 derivatives were new compounds. All compounds were tested for the inhibitory effects on three tumor cell lines, and 17 compounds were active with the IC50 values ranging from 1.91 ± 0.39 μM to 12.29 ± 1
对广玉兰的植物化学研究分离出 39 种倍半萜类化合物,其中包括 15 种新化合物 ( 1 – 15 )。化合物1和2是天然产物中第一个被发现的13-norgermacrane型倍半萜类化合物。化合物15是一种罕见的5,6-仲愈创木烷型倍半萜,推测其可能的生物前体是化合物20。随后对化合物28进行结构修饰,得到21个衍生物,其中15个衍生物为新化合物。测试了所有化合物对三种肿瘤细胞系的抑制作用,其中 17 种化合物具有活性,IC 50值范围为 1.91 ± 0.39 μM 至 12.29 ± 1.68 μM。构效关系表明α , β-不饱和内酯基团是细胞毒性的重要活性基团。选择对正常人肝细胞系低毒性的两种最活跃的化合物(19和29 )进行进一步的机制研究。化合物29可以通过影响关键的凋亡相关蛋白,如PARP、Cleaved PARP、cleaved Caspase-3和pro-Caspase