Abstract
Alpha-copaene (α-COP), a tricyclic sesquiterpene, is present in several essential oils of medicinal and aromatic plants and has antioxidant and antigenotoxic features. Its cytotoxic, cytogenetic and oxidative effects have not been in- vestigated in neuron and N2a neuroblastoma (NB) cell cultures. Therefore, we aimed to describe in vitro :( i) cytotoxic properties by 3-(4,5-dimetylthiazol-2-yl)-2,5-diphenlytetrazolium bromide test; (ii) antioxidant/oxidant activity by total antioxidant capacity (TAC) and total oxidative status (TOS) analysis; and (iii) genotoxic damage potential by single cell gel electrophoresis - of α-COP in healthy neuron and N2a-NB cell cultures for the first time. Significant ( P< 0.05) de- crease in cell proliferation were observed in cultured primary rat neurons starting with the concentration of 150 mg/L and in N2a-NB cells starting with 100 mg/L. In addition, 25 mg/L of α-COP treatment caused increase of TAC levels and α-COP treatments at higher doses led to increase of TOS levels in neuron N2a-NB cell cultures. Moreover, none of the tested concentrations of α-COP have shown a genotoxic effect on both cell lines. Our findings clearly demonstrate that α-COP exhibited mild cytotoxic effects on N2a-NB cell line. In conclusion, α-COP may have potential as an anticancer agent, which needs to be further studied.
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