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Changes in plasma levels of IGF-I and IGF-II, and in testicular IGF-I and II mRNA during the first gonadal maturation in rainbow trout
Le Gac, F.; Gomez, J.M.; Fostier, A.; Weil, C.; Le Bail, P.Y. (2000). Changes in plasma levels of IGF-I and IGF-II, and in testicular IGF-I and II mRNA during the first gonadal maturation in rainbow trout, in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 263
In: Norberg, B. et al. (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. International Symposium on the Reproductive Physiology of Fish, 6. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., meer
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales. , meer
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  • Le Gac, F.
  • Gomez, J.M.
  • Fostier, A.
  • Weil, C.
  • Le Bail, P.Y.
Abstract
    We describe the changes in IGF-I and II plasma levels in males and females and those of testis and liver IGF-I and II mRNA contents during the cycle in relation to changes in other plasma hormones and gonad GH-Receptors. We conclude that, in both sexes, increases in circulating concentrations of IGF may play a physiological role in the earliest stages of the gametogenetic cycle. Changes in testicular IGF-I and II mRNA occur later, and IGF-I expression seems more related to GTH-I and androgen plasma levels than to plasma GH or testicular GH-Receptor changes.
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