Peculiarities of modification by astaxanthin of radiation-induced damages in the genome of human blood lymphocytes exposed in vitro on different stages of the mitotic cycle

Resumo

The features of astaxanthin impact (20 μg/mL) in the culture of human blood lymphocytes exposed to γ-radiation (1.0 Gy) on the G₀, S, and G₂ phases of the cell cycle were studied using Comet assay. Decrease in the level of DNA damages (Tail Moment index) under astaxanthin influence on lymphocytes irradiated in all stages of cell division was established, while, as a result of previous cytogenetic investigations, lack of the modifying action of astaxanthin after irradiation of cells in the G₂ stage and radioprotective effect in the G0 stage of the mitotic cycle had been revealed. In G₀ phase, the activation of the processes of apoptosis by astaxanthin in irradiated cells with high levels of genomic damages was found. The obtained data demonstrate that astaxanthin has a powerful radioprotective potential, mainly due to its apoptogenic properties.