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Spiramine derivatives induce apoptosis of Bax(-/-)/Bak(-/-) cell and cancer cells
Chen Yan1, Li Huang2, Hong-Chun Liu3
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; University of Chinese Academy of Sciences, Beijing 100039, PR China; The Key Laboratory of Chemistry for Natural Product of Guizhou Province, Chinese Academy of Science, Beijing 100101, PR China.
Abstract:
Spiramine C-D, the atisine-type diterpenoid alkaloids isolated from the Chinese herbal medicine Spiraea japonica complex, are shown to have anti-inflammatory effects in vitro. In this study, we report that spiramine derivatives of spiramine C-D bearing α,β-unsaturated ketone induce apoptosis of Bax(-/-)/Bak(-/-) MEFs cell, which is positively corresponding their cytotoxicity of tumor cell lines including multidrug resistance MCF-7/ADR. The results indicated that oxazolidine ring is necessary, and derivatives bearing double 'Michael reaction acceptor' group would significantly increased activities both of inducing apoptosis of Bax(-/-)/Bak(-/-) cells and cytotoxicity of tumor cells. The result indicated that spiramine derivative with α,β-unsaturated ketone group is a new anti-cancer agent with a capability of inducing apoptosis of cancer cells in Bax/Bak-independent manner.
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