Lathyrane diterpenoids from <i>Jatropha podagrica</i> and their antitumor activities in human osteosarcoma cells
Han-Tao Yuan, Qun-Feng Li, Tian Tian, Chunyan Zhang, Zouqin Huang, Chun-xiang Fan, Ke Mei, Jie Zhou, Xiaoxiang Zhai, Si-Bo Li, Jian‐Yong Zhu
Abstract
Two new lathyrane-type diterpenoids, jatropodagins A and B (1 and 2), and five known analogues (3–7), were isolated from the stems of Jatropha podagrica. Their structures and absolute configurations were elucidated by spectroscopic data and calculated ECD analyses. The cytotoxicities of all the lathyrane-type diterpenoids (1–7) were evaluated against two human osteosarcoma cell lines (Saos-2 and MG-63). Compound 1 exhibited significant cytotoxic effects against Saos-2 and MG-63 with IC50 values of 8.08 and 14.64 μM, respectively. The IC50 values for the positive control 5-FU against the Saos-2 and MG-63 cell lines were 19.01 and 25.00 μM, respectively. Morphological features of apoptosis activities were evaluated in 1-treated Saos-2 cells and the results confirmed apoptosis in a dose-dependent manner.