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Determination of quercetin concentrations in fish tissues after feeding quercetin-containing diets
Park, K.H.; Rodriguez-Montes de Oca, G.A.; Bonello, P.; Lee, K.J.; Dabrowski, K. (2009). Determination of quercetin concentrations in fish tissues after feeding quercetin-containing diets. Aquacult. Int. 17(6): 537-544. dx.doi.org/10.1007/s10499-008-9222-6
In: Aquaculture International. Springer: London. ISSN 0967-6120, more
Peer reviewed article  

Available in  Authors 

Keywords
    Marine; Fresh water

Authors  Top 
  • Park, K.H.
  • Rodriguez-Montes de Oca, G.A.
  • Bonello, P.
  • Lee, K.J.
  • Dabrowski, K.

Abstract
    Concentrations of quercetin in fish tissues were measured for the first time using HPLC-electrochemical detection method. Its identity was also ascertained with UV-photodiode array detection. Quercetin, in aglycone form, was at measurable concentrations in tilapia plasma, liver, and whole body homogenate when fed with diets containing 1% quercetin (aglycone) for 1 or 15 weeks. Hydrolysis with glucuronidase/sulfatase treatment for the purpose of cleaving conjugates did not increase quercetin levels, suggesting that glucoronide or sulfate conjugates are not the major metabolic forms in Nile tilapia (Oreochromis niloticus). No quercetin was detected in plasma of rainbow trout (Salmo gairdneri) or white sturgeon (Acipenser transmontanus) fed commercial diets. The results suggest that quercetin is absorbed in tilapia and that this flavonoid is deposited mainly in aglycone form in the body after absorption.

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