17β estradiol induced ROS generation, DNA damage and enzymatic responses in the hepatic tissue of Japanese sea bass

The importance of endocrine disrupting chemicals and their effects on fish has been documented in recent years. However, little is known about whether the estrogenic compound 17β estradiol (E2) causes oxidative stress in the hepatic tissue of fish. Therefore, this work tested the hypothesis that E2...

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Veröffentlicht in:Ecotoxicology (London, England). - 1998. - 19(2010), 7 vom: 31. Okt., Seite 1258-67
1. Verfasser: Thilagam, Harikrishnan (VerfasserIn)
Weitere Verfasser: Gopalakrishnan, Singaram, Qu, Hai-Dong, Bo, Jun, Wang, Ke-Jian
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2010
Zugriff auf das übergeordnete Werk:Ecotoxicology (London, England)
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Antioxidants Biomarkers Endocrine Disruptors Reactive Oxygen Species Estradiol 4TI98Z838E Cytochrome P-450 CYP1A1 EC 1.14.14.1 mehr... Superoxide Dismutase EC 1.15.1.1 Glutathione GAN16C9B8O
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520 |a The importance of endocrine disrupting chemicals and their effects on fish has been documented in recent years. However, little is known about whether the estrogenic compound 17β estradiol (E2) causes oxidative stress in the hepatic tissue of fish. Therefore, this work tested the hypothesis that E2 might cause oxidative stress in the Japanese sea bass Lateolabrax japonicus liver. To test this hypothesis, its effects on reactive oxygen species (ROS) production, DNA damage, antioxidants and biotransformation enzyme were investigated in two different size groups (fingerling and juvenile groups) following 30 days exposure. Results showed that there was a good relationship between the E2 exposure concentration, plasma E2 level and ROS generation. In addition ROS production correlated negatively with 7-ethoxyresorufin-O-deethylase activity and positively with DNA damage and lipid peroxidation (LPO). Antioxidant enzymes such as superoxide dismutase and catalase did not show any significant relation with ROS, LPO and DNA damage. In contrast, glutathione mediated enzymes showed a good relationship with the above parameters suggesting that the glutathione system in fish might be responsible for protection against the impact of E2 and also indicating a possible adaptive response during exposure periods. In addition, it was observed that fingerling was more susceptible to E2 exposure than juvenile fish. The present study provided strong evidence that the ROS level increased significantly in the liver of E2 exposed fish, and that ROS might serve as a biomarker to indicate estrogen contamination 
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650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Biomarkers  |2 NLM 
650 7 |a Endocrine Disruptors  |2 NLM 
650 7 |a Reactive Oxygen Species  |2 NLM 
650 7 |a Estradiol  |2 NLM 
650 7 |a 4TI98Z838E  |2 NLM 
650 7 |a Cytochrome P-450 CYP1A1  |2 NLM 
650 7 |a EC 1.14.14.1  |2 NLM 
650 7 |a Superoxide Dismutase  |2 NLM 
650 7 |a EC 1.15.1.1  |2 NLM 
650 7 |a Glutathione  |2 NLM 
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700 1 |a Gopalakrishnan, Singaram  |e verfasserin  |4 aut 
700 1 |a Qu, Hai-Dong  |e verfasserin  |4 aut 
700 1 |a Bo, Jun  |e verfasserin  |4 aut 
700 1 |a Wang, Ke-Jian  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Ecotoxicology (London, England)  |d 1998  |g 19(2010), 7 vom: 31. Okt., Seite 1258-67  |w (DE-627)NLM098212214  |x 1573-3017  |7 nnns 
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