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• W2043669809 abstract "Blooms of the toxic dinoflagellate Karenia mikimotoi (K. mikimotoi) have occurred frequently in the East China Sea in recent decades and were responsible for massive mortalities of abalones in Fujian coastal areas in 2012, however, little is known about the effects of these blooms on other marine organisms. In this study, the toxic effects and the possible mechanisms of toxicity of K. mikimotoi from Fujian coastal waters on typical marine organisms at different trophic levels, including zooplankton (Brachionus plicatilis, Artemia salina, Calanus sinicus, and Neomysis awatschensis) and aquaculture species (Penaeus vannamei and Scophthalmus maximus) were investigated. At a bloom density of 3 × 104 cells/mL, the Fujian strain of K. mikimotoi significantly affected the tested organisms, which had mortality rates at 96 h of 100, 23, 20, 97, 33, and 53%, respectively. Moreover, the intact cell suspension was toxic to all tested species, whereas cell-free culture and the ruptured cell suspension had no significant effects on the tested organisms. Possible mechanisms for this toxic effect, including reactive oxygen species (ROS) and hemolytic toxins, were evaluated. For K. mikimotoi, 0.014 ± 0.004 OD/(104 cells) superoxide (O2−) and 3.00 ± 0.00 nmol/(104 cells) hydrogen peroxide (H2O2) were measured, but hydrogen peroxide did not affect rotifers at that concentration, and rotifers were not protected from the lethal effects of K. mikimotoi when the enzymes superoxide dismutase and catalase were added to counteract the ROS. The lipophilic extract of K. mikimotoi had a hemolytic effect on rabbit erythrocytes but exhibited no significant toxicity. These results suggest that this strain of K. mikimotoi can have detrimental effects on several typical marine organisms and that its toxicity may be associated with intact cells but is not related to ROS or hemolytic toxins." @default.
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• W2043669809 date "2006-09-01" @default.
• W2043669809 modified "2023-10-16" @default.
• W2043669809 title "Effects of vitamin E on lindane induced cytotoxicity in Chinese Hamster Ovary cell line" @default.
• W2043669809 doi "https://doi.org/10.1016/j.toxlet.2006.07.111" @default.
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