Effects of nanoparticles (Al2O3, CuO, TiO2) on the antioxidant system biomarkers of freshwater mussel (Unio tigridis)


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Canlı E. G.

7th International Conference on Enviromental Science and Technology, Sarajevo, Bosna-Hersek, 23 - 25 Haziran 2021, ss.1-18

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Sarajevo
  • Basıldığı Ülke: Bosna-Hersek
  • Sayfa Sayıları: ss.1-18
  • Çukurova Üniversitesi Adresli: Hayır

Özet

Mussels are known as the natural filters of the aquatic systems and thus are accepted as one of the best bio-indicator organism. Freshwater mussel Unio tigridis is distributed in the freshwater systems in the Southern-east part of Turkey. Although these mussels were used in several toxicological studies, there is no data on their response following metal-oxide nanoparticles (NPs) exposures. This study aimed to investigate the response of the antioxidant enzymes of U. tigridis following exposure to Al2O3, CuO and TiO2 NPs. The mussels were exposed to different concentrations (0, 1, 3, 9 mg NP/L) of NPs for 14 days and subsequently, the activities of CAT (catalase), SOD (superoxide dismutase), GPx (glutathione peroxidase), GST (glutathione S-transferase) and GR (glutathione reductase) were measured in the gill and digestive gland. Mussels were fed with cultured unicellular algae (Chlorella vulgaris) during experiments. Data showed that the consumption rate of algae by mussels were not significantly altered by NPs. Data also demonstrated that all enzyme activities altered significantly (P<0.05) after NP exposures, most alterations being decreases in CAT activity. Similarly, SOD activity also decreased in the digestive gland, but it increased in the gill. However, enzymes belonging to the glutathione metabolisms (GPx and GST) increased following NP exposures in the digestive gland and gill, though GR activity decreased in both tissues. Data also revealed that most alterations occurred at the highest exposure concentration of NPs. This study representing the first record on the antioxidant system response of U. tigridis toward NP exposures suggests that further studies should be carried out to understand better the effects of NPs in aquatic species.