Influence of the exposure way and the time of sacrifice on the effects induced by a single dose of pure Cylindrospermopsin on the activity and transcription of glutathione peroxidase and glutathione-S-transferase enzymes in Tilapia (Oreochromis niloticus)

► CYN induce oxidative stress in fish. ► CYN alters the activity and gene expression of GST and GPx enzymes. ► Time of sacrifice and exposure way influence the results. ► The higher effects are induced after 5 d of an intraperitoneal exposure.