Clothilde HEUDE - Université de Caen Basse Normandie
Clothilde HEUDE - Université de Caen Basse Normandie
Clothilde HEUDE - Université de Caen Basse Normandie
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2006<br />
<strong>Clothil<strong>de</strong></strong> <strong>HEUDE</strong><br />
Hanquet-Dufour, A. - C., Kellner, K., Heu<strong>de</strong>, C., Naimi, A., Mathieu, M., & Poncet, J. - M. (2006).<br />
Cryopreservation of Crassostrea gigas vesicular cells: Viability and metabolic activity. Cryobiology,<br />
53(1), 28-36.<br />
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Résumé: Cryopreservation is wi<strong>de</strong>ly used for long-term conservation of various tissues, embryos<br />
or gametes. However, few studies have <strong>de</strong>scribed cryopreservation of invertebrate primary cell<br />
cultures and more particularly of marine invertebrate somatic cells. This technique would however<br />
be of great interest to facilitate the study of various metabolic processes which vary seasonally.<br />
The aim of the present study was to <strong>de</strong>velop a protocol for cryopreservation of Crassostrea gigas<br />
vesicular cells. Different parameters were adjusted to improve recovery of cells after freezing. The<br />
most efficient cryoprotectant agent was a mix of Me2SO, glycerol, and ethylene glycol (4% each).<br />
The optimal cooling rate was -1 °C min-1 down to -70 °C before transfer into liquid nitrogen. In<br />
these conditions the percentage of viable cells reached 70% of the control. The glucose<br />
metabolism of thawed cells was evaluated using radioactive glucose as a tracer. Immediately after<br />
thawing, glucose uptake involving membrane transporters was greatly reduced (24% of control)<br />
whereas glucose incorporation into glycogen was less affected (68% of control).<br />
Mots-Clés: Crassostrea gigas; Cryopreservation; Glycogen metabolism; Mollusc; Oyster;<br />
Vesicular cells<br />
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2003<br />
Heu<strong>de</strong> Berthelin, C., Fievet, B., Leclerc, G., Germain, P., Kellner, K., & Mathieu, M. (2003). In vivo<br />
and in vitro approaches to the analysis of glycogen metabolism in the pacific oyster Crassostrea<br />
gigas. Journal of Shellfish Research, 22(3), 715-720.<br />
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