Fish Physiology and Biochemistry

, Volume 43, Issue 2, pp 455–464 | Cite as

Characterization and in vitro sensitivity of cholinesterases of gilthead seabream (Sparus aurata) to organophosphate pesticides

  • G. Albendín
  • J. M. Arellano
  • M. P. Mánuel-Vez
  • C. Sarasquete
  • M. I. Arufe


The characterization of cholinesterase activity in brain and muscle of gilthead seabream was carried out using four specific substrates and three selective inhibitors. In addition, K m and V max were calculated from the Michaelis–Menten equation for ASCh and BSCh substrates. Finally, the in vitro sensitivity of brain and muscle cholinesterases to three organophosphates (OPs) was also investigated by estimating inhibition kinetics. The results indicate that AChE is the enzyme present in the brain, whereas in muscle, a typical AChE form is present along with an atypical form of BChE. Very low ChE activity was found in plasma with all substrates used. The inhibitory potency of the studied OPs on brain and muscle AChEs based on bimolecular inhibition constants (k i ) was: omethoate < dichlorvos < azinphosmethyl-oxon. Furthermore, muscle BChE was found to be several orders of magnitude (from 2 to 4) more sensitive than brain and muscle AChE inhibition by dichlorvos and omethoate.


Gilthead seabream Sparus aurata Biomarker Organophosphate Cholinesterase Inhibition kinetics 



The authors are grateful to the Laboratory of Marine Culture at University of Cádiz for providing the experimental fish used in this study. This work was supported by Plan Nacional de I + D, Sciences and Technology Minister (Project: CTM2004-05718) and in part by Plan Andaluz de Investigación (PAI group: RNM-345).

Supplementary material

10695_2016_299_MOESM1_ESM.doc (2.3 mb)
Supplementary material 1 (DOC 2342 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • G. Albendín
    • 1
  • J. M. Arellano
    • 1
  • M. P. Mánuel-Vez
    • 2
  • C. Sarasquete
    • 3
  • M. I. Arufe
    • 1
  1. 1.Toxicology Laboratory, Faculty of Marine and Environmental SciencesUniversity of CádizPuerto RealSpain
  2. 2.Analytical Chemical Department, Faculty of Marine and Environmental SciencesUniversity of CádizPuerto RealSpain
  3. 3.Institute of Marine Sciences of Andalucía (ICMAN-CSIC)Puerto RealSpain

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