[Insulin-like growth factors and gonadal regulation in fish].
Recent data showing the occurrence of IGF in fish, mainly teleostean fish, and their biological activity in gonads are reviewed. IGF-I does occur in all vertebrates and first evidence of IGF-II occurrence in fish has been reported. IGF-I is expressed in the testis and the ovary, and receptors for the peptide have been demonstrated in both gonads. Besides, IGF-I seems implied in spermatogonial proliferation and in oocyte maturation. Both germinal cells and somatic cells could be responsive to IGF-I stimulation.
Fostier
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A
Laboratoire de physiologie des poissons, Institut national de la recherche agronomique, Rennes, France.
Le Gac
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F
Loir
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M
D000818:Animals; D005399:Fishes; D006066:Gonads / Q000737:chemistry / Q000187:drug effects* / Q000254:growth & development; D017451:Receptors, Somatomedin / Q000502:physiology; D013002:Somatomedins / Q000032:analysis / Q000145:classification / Q000502:physiology*
D017451:Receptors, Somatomedin; D013002:Somatomedins
Facteurs de croissance de type insulinique et régulation gonadique chez les poissons.