A caffeine-supplemented diet modulates oxidative stress markers and prevents oxidative damage in the livers of Nile tilapia (Oreochromis niloticus) exposed to hypoxia

2019 ◽  
Vol 45 (3) ◽  
pp. 1041-1049 ◽  
Author(s):  
Matheus D. Baldissera ◽  
Carine F. Souza ◽  
Sharine N. Descovi ◽  
Tiago G. Petrolli ◽  
Aleksandro S. da Silva ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oxidative Damage ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Nile Tilapia Oreochromis Niloticus

scholarly journals The Duckweed, Lemna minor Modulates Heavy Metal-Induced Oxidative Stress in the Nile Tilapia, Oreochromis niloticus

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2983
Author(s):  
Fagr Kh. Abdel-Gawad ◽  
Wagdy K. B. Khalil ◽  
Samah M. Bassem ◽  
Vikas Kumar ◽  
Costantino Parisi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heavy Metal ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Lemna Minor ◽  
Fish Growth ◽  
High Dose ◽  
Gene Expressions ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Cu And Zn

A two-fold integrated research study was conducted; firstly, to understand the effects of copper (Cu) and zinc (Zn) on the growth and oxidative stress in Nile tilapia, Oreochromis niloticus; secondly, to study the beneficial effects of the duckweed Lemna minor L. as a heavy metal remover in wastewater. Experiments were conducted in mesocosms with and without duckweed. Tilapia fingerlings were exposed to Cu (0.004 and 0.02 mg L−1) and Zn (0.5 and 1.5 mg L−1) and fish fed for four weeks. We evaluated the fish growth performance, the hepatic DNA structure using comet assay, the expression of antioxidative genes (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase, GPx and glutathione-S-transferase, GST) and GPx and GST enzymatic activity. The results showed that Zn exhibited more pronounced toxic effects than Cu. A low dose of Cu did not influence the growth whereas higher doses of Cu and Zn significantly reduced the growth rate of tilapia compared to the control, but the addition of duckweed prevented weight loss. Furthermore, in the presence of a high dose of Cu and Zn, DNA damage decreased, antioxidant gene expressions and enzymatic activities increased. In conclusion, the results suggest that duckweed and Nile tilapia can be suitable candidates in metal remediation wastewater assessment programs.

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