Immunohistochemical localization of IGF-I, IGF-II and MSTN proteins during development of triploid sea bass (Dicentrarchus labrax)

  • G. Radaelli | University of Padua, Italy.
  • C. Poltronieri
  • C. Simontacchi
  • E. Negrato
  • F. Pascoli
  • A. Libertini
  • D. Bertotto


The cellular localization of IGF-I, IGF-II and MSTN proteins was investigated during ontogenesis of triploid sea bass (Dicentrarchus labrax) by an immunohistochemical approach. The results were compared with those observed in diploids. IGF-I immunostaining was mainly observed in skin, skeletal muscle, intestine and gills of both diploids and triploids. From day 30 of larval life, IGF-I immunoreactivity observed in skeletal muscle, intestine, gills and kidney was stronger in triploids than in diploids. At day 30, triploids exhibited a standard length significantly higher than the one of diploids. Although IGF-II and MSTN immunoreactivity was detectable in different tissues and organs, no differences between diploids and triploids were observed. The spatial localization of IGF-I, IGF-II and MSTN proteins detected in this study is in agreement with previous findings on the distribution of these proteins in diploid larvae and fry. The highest IGF-I immunoreactivity observed in triploids suggests a possible involvement of ploidy in their growth performance.


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Author Biography

G. Radaelli, University of Padua
Department of Experimental Veterinary Sciences, University of Padua
Original Papers
Supporting Agencies
Italian Ministero dell’Università e della Ricerca Scientifica e Tecnologica (MIUR) and University of Padua (Progetto di Ateneo).
IGF-I, IGF-II, MSTN, immunohistochemistry, triploid
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How to Cite
Radaelli, G., Poltronieri, C., Simontacchi, C., Negrato, E., Pascoli, F., Libertini, A., & Bertotto, D. (2010). Immunohistochemical localization of IGF-I, IGF-II and MSTN proteins during development of triploid sea bass (Dicentrarchus labrax). European Journal of Histochemistry, 54(2), e16.

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