Fish Physiology and Biochemistry

, Volume 42, Issue 2, pp 617–629 | Cite as

Detoxification and antioxidant effects of garlic and curcumin in Oreochromis niloticus injected with aflatoxin B1 with reference to gene expression of glutathione peroxidase (GPx) by RT-PCR



The present study aims to investigate the effects of both garlic and curcumin through evaluating their therapeutic properties as antioxidants on liver and kidney functions, hepatic antioxidants and GPx gene expression against aflatoxicosis of O. niloticus. In total, 180 of tilapia were divided into ten groups; T1 represented the negative control fed on a basal diet, and T2 was injected with a single intraperitoneal (i.p.) dose of AFB1 (6 mg/kg b.w.). Fish in T3–T6 were fed on a basal diet supplemented with both garlic (T3 and T4) and curcumin (T5 and T6) at the two concentrations of 10 and 20 g/kg diet, respectively. Fish in T7–T10 groups were injected with AFB1 and fed on the garlic (T7 and T8) and curcumin (T9 and T10) dietaries. The results showed that AFB1 has significant potency for increasing the activity of plasma AST, ALT, creatinine and uric acid values, and hepatic MDA as well as for reducing the concentrations of plasma TP, AL, GL and hepatic activity of TAC, while AFB1 led to up-regulated GPx gene expression when compared to the control (T1). These harmful effects of AFB1 were alleviated due to the garlic and curcumin dietaries in some studied parameters. Garlic reflected the highest induction of gene expression (T7); however, curcumin showed significant down-regulated (T9). These results concluded that the effects of garlic were better than curcumin at the two concentrations and the low concentration of them is more beneficial than the high concentration when it used against AFB1 in O. niloticus.


Aflatoxin B1 Garlic Curcumin Liver and kidney functions Antioxidant indexes Gene expression Oreochromis niloticus 


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© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Fish Diseases LaboratoryNational Institute of Oceanography and Fisheries (NIOF)CairoEgypt

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