Journal
FITOTERAPIA
Volume 170, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fitote.2023.105672
Keywords
Apiaceae; Seseli bocconeiGuss.; S. tortuosum subsp. maritimum Guss.; Essential oils; Germacrene D; Anti-tumor effects; colon cancer cells
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This study investigates the chemical compositions of essential oils extracted from different parts of two wild endemic species of Sicily, Seseli bocconei Guss. and Seseli tortuosum subsp. maritimum Guss. It is found that the main metabolite classes vary among the different parts of the plants. The stem essential oils of both plants exhibit strong cytotoxic effects against colon cancer cells, and germacrene D is identified as a promising molecule with anticancer properties.
In this study, the chemical compositions of two essential oils (EOs) obtained from different parts (flowers, leaves, stems, and roots) of Seseli bocconei Guss. and of Seseli tortuosum subsp. maritimum Guss., wild endemic species of Sicily, were investigated. The main classes of metabolites for the essential oils of S. bocconei were, respectively, monoterpenes hydrocarbons for flowers, sesquiterpenes hydrocarbons for leaves, and a breakdown between the two previously mentioned classes for stems. In the case of S. tortuosum subsp. maritimum, on the other hand, the main metabolite class for all the vegetative parts analyzed (flowers, stems, and roots) was monoterpene hydrocarbons, with a slight percentage in other non-terpenoid compounds. Furthermore, the EOs' antitumor effects against HCT116, human colon cancer cells were evaluated. Cell viability assays evidenced that stems' EOs of both plants exhibit strong cytotoxic effects at low concentrations, while the EOs from other vegetative parts do not show a relevant effect. In fact, EO of stems of S. tortuosum subsp. maritimum reduced the cell viability of 82% at the concentration of 125 mu g/mL, while at the concentration of 250 mu g/mL of stems EO of S. bocconei the 97% of cells resulted dead. The analysis of the effects exerted by the main phytocostituents (S-(-)-limonene, R(+)-limonene, sabinene, (1S)-(- )-alpha-pinene, (1R)-(+)-alpha-pinene, and (-)-fl-pinene, and germacrene D) of these EOs on colon cancer cells revealed germacrene D as a new promising molecule with anticancer properties that deserve to be explored in future directions.
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