Steroid synthesis during oocyte maturation in the Siberian sturgeon Acipenser baerii

Alberro A., Williot P., Vizziano D.

Date de parution: juillet 2008
Volume: 32
Number: 2 suppl.
Pagination: 255
Editeur: Société Française d'Ichtyologie

This study was directed to identify the major steroid produced by follicles of the Siberian sturgeon during oocyte maturation. Among several steroids produced in vitro the 17,20β,21-trihydroxy-4-pregnen-3-one (20βS) was the most prominent both under basal and LH-stimulated conditions; while the 17,20βP was not systematically detected in the plasma of GnRHa-stimulated females. These results suggest that 20βS could be the maturing inducing steroid (MIS) for the species.

Mots-clés: Acipenser transmontanus - Androgen - GnRH stimulation - MIS
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