Cytotoxicity of syringin and 4-methoxycinnamyl alcohol isolated from Foeniculum vulgare on selected human cell lines
2015
Lall, Namrita | Kishore, Navneet | Binneman, Brigitte | Twilley, Danielle | van de Venter, Maryna | Plessis-Stoman, Debbie du | Boukes, Gerhardt | Hussein, Ahmed
This study was carried out to determine the cytotoxic effect of seven plant extracts and the isolated compounds – syringin and 4-methoxycinnamyl alcohol – on cancerous and non-cancerous cells. The ethanol extract of Foeniculum vulgare was found to exhibit the most significant toxicity with an IC ₅₀ value of 19.97 μg/mL on HeLa cells. Bioassay-guided fractionation led to the isolation of two compounds, syringin (1) and 4-methoxycinnamyl alcohol (2). Both compounds showed toxicity against MCF-7, HeLa and DU145 cancer cell line. The results showed that compound 2 showed high toxicity against all the cancer cell lines with IC ₅₀ values of 14.24, 7.82 and 22.10 μg/mL, respectively. 4-Methoxycinnamyl alcohol also showed no apoptotic effect in cell cycle analysis after 48 h at a concentration of 10 μg/mL. However, DNA fragmentation study revealed that necrosis took place at a concentration of 10 μg/mL after 48 h exposure.
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