Selective cytotoxicity, inhibition of cell cycle progression, and induction of apoptosis in human breast cancer cells by sesquiterpenoids from Inula lineariifolia Turcz
- Eur J Med Chem. 2013 Oct:68:473-481. doi: 10.1016/j.ejmech.2013.07.018.
- 1. School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, PR China.
- 2. Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
- 3. Department of Phytochemistry, Second Military Medical University, Shanghai 200433, PR China.
- # Contributed equally.
Four new sesquiterpenoid dimers (lineariifolianoids E-H, 1-4), five new sesquiterpenoids (5-9), and seven known sesquiterpenoids (10-16) were isolated from the aerial parts of Inula lineariifolia Turcz. Their structures were determined by spectroscopic data analysis and X-ray diffraction studies. The compounds were then evaluated for their in vitro cytotoxicity against two human Breast Cancer cell lines (MCF-7 and MDA-MB-231) and one normal breast cell line (MCF-10A). Lineariifolianoid E (1) showed IC50 values of 1.56 μM and 2.75 μM against MCF-7 and MDA-MB-231, respectively. However, lineariifolianoid E demonstrated low toxicity to MCF-10A cells, which indicated a selective cytotoxicity for tumor cells. Further studies also presented that lineariifolianoid E had significant, dose-dependent effects on cell cycle progression and Apoptosis in Breast Cancer cells.