Abstract
The aim of this paper was to evaluate genotoxic effects of borneol and its ability to change DNA-damaging effects of H2O2 in rat hepatocytes and testicular cells. Both in vitro and ex vivo approaches were used in the case of hepatocytes. Testicular cells were tested only ex vivo, i.e. shortly after isolation from rats supplemented by borneol. Cytotoxicity of borneol increased in in vitro conditions in a concentration-dependent manner and it was associated with DNA-damaging effects at toxic concentrations. While non-toxic concentrations of borneol applied in vitro protected cells against H2O2-induced DNA damage and interfered only partly with rejoining of H2O2-induced DNA strand breaks, cytotoxic concentrations of borneol manifested synergy with H2O2, i.e. enhanced DNA-damaging effects of H2O2. On the other side, borneol given to rats in drinking water decreased the level of DNA damage induced by H2O2 in both hepatocytes and testicular cells. Our results show that though at higher concentrations (2-h treatment with >2mM borneol >0.3084mg/ml) borneol acts cytotoxically and genotoxically on primary hepatocytes cultured in vitro, if given to rats during 7 days in a daily concentration of 17.14 or 34.28mg/kg it reduces genotoxicity of H2O2 in both hepatocytes and testicular cells.
Published Version
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