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Synthesis and possible function of 11-ketotestosterone during oogenesis in eel (Anguilla spp.)

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Abstract

The control of 11-ketotestosterone (11-KT) biosynthesis and its physiological roles were examined in female Japanese eel (Anguilla japonica) and New Zealand longfinned eel (Anguilla dieffenbachii). 11-KT was detected in serum of female eels of both species. Among various tissues from Japanese eel, the ovary had the greatest capacity to synthesize 11-KT in vitro. In addition, the oocyte diameters of eels treated with 11-KT had increased significantly. Furthermore, these oocytes were found to have an increased number of oil droplets. These findings suggest that 11-KT in female eels may be mostly of ovarian origin and that this androgen appears to play an important role in controlling pre-vitellogenic oocyte growth.

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References

  • Lokman, P.M., Harris, B., Kusakabe, M., Kime, D.E., Schulz, R.W., Adachi, S. and Young, G. 2002. 11-oxygenated androgens in female teleosts: prevalence, abundance, and life history implications. Gen. Comp. Endocrinol. 129: 1–12.

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Authors and Affiliations

  1. Div. Marine Biosci., Grad. School Fisheries Sci., Hokkaido Univ., Hakodate, Japan

    M. Matsubara, A. Senaha, Y. Kazeto, S. Ijiri, T. Todo, S. Adachi & K. Yamauchi

  2. Dept. Marine Science, Univ. of Otago, Dunedin, New Zealand

    P.M. Lokman

  3. Kambegawa labo, Komae, Tokyo, Japan

    A. Kambegawa

  4. Dept. Biosci. / Biotech. Res. Center, Teikyo Univ. of Sci. and Tech., Uenohara, Yamanashi, Japan

    T. Hirai

  5. Dept. Biol. Sci. & Center Repr. Biol., Univ. of Idaho, Moscow, ID, USA

    G. Young

Authors
  1. M. Matsubara
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  2. P.M. Lokman
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  3. A. Senaha
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  4. Y. Kazeto
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  5. S. Ijiri
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  6. A. Kambegawa
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  7. T. Hirai
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  8. G. Young
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  9. T. Todo
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  10. S. Adachi
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  11. K. Yamauchi
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Matsubara, M., Lokman, P., Senaha, A. et al. Synthesis and possible function of 11-ketotestosterone during oogenesis in eel (Anguilla spp.). Fish Physiology and Biochemistry 28, 353–354 (2003). https://doi.org/10.1023/B:FISH.0000030585.22093.7a

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  • DOI: https://doi.org/10.1023/B:FISH.0000030585.22093.7a

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