Microencapsulation of okadaic acid as a tool for studying the accumulation of dsp toxins in mussels

Araceli E. Rossignoli (1) , David Fernández (1) , Carmen P. Acosta (1) , Juan Blanco (1)

1 Centro de Investigacións Mariñas (CIMA). Pedras de Corón

The possibility and effectiveness of microencapsulation of okadaic acid (OA) in gelatin acacia microcapsules has been studied. The encapsulation efficiency was . 33%. The microcapsules were shown to be very stable, not leaching more than 9% of the encapsulated OA in a 20-hour period. OA from the microcapsules was absorbed by the mussels very efficiently, accumulating -after 3 days of feeding and one of depuration- 65% of the OA in microcapsules and 22% of the total OA used at the beginning of the microencapsulation process. These efficiencies and the possibility of encapsulating single DSP toxins and derivatives constitute a valuable tool for the study of the accumulation and biotransformation of DSP toxins in bivalves.

Mots clés: Microcapsules; okadaic acid; absorption efficiency; biotransformation; mussels

Araceli E. Rossignoli, David Fernández, Carmen P. Acosta, Juan Blanco. Microencapsulation of okadaic acid as a tool for studying the accumulation of dsp toxins in mussels. Marine Environmental Research, 2011, 71 (1), pp.91. ⟨10.1016/j.marenvres.2010.11.003⟩. ⟨hal-00658699⟩