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Effect of androgen substrates on the steroidogenic pattern of cumulus cells: Correlation with cumulus culture morphology

Journal of Assisted Reproduction and Genetics volume 14, pages 270–276 (1997)Cite this article

Abstract

Background: In previous studies, higher progesterone secretion was observed in mature versus immature cumulusoocyte complexes. In mature cumulus mass that become homogeneously spread in culture (type C/D) progesterone secretion was higher than in partially (type B) or totally (type A) aggregated morphology. In sharp contrast, estradiol-17β secretion was significantly higher in type A than type C/D cumulus.

Purpose: Our purpose was to assess whether the decreased estradiol-17β level in type C/D cumulus culture is caused by deficiency of substrates.

Methods: The different cumulus types were incubated with or without 10−7 M dehydroepiandrosterone, 4-androstane-3, 17-dione, or testosterone. The levels of estradiol-17β, testosterone, and progesterone, were measured after 24 hr of culture.

Results: The addition of dehydroepiandrosterone or 4-androstane-3,17-dione significantly increased the estradiol-17β levels in all types of cumulus cells, whereas the addition of testosterone was less effective. In all types of cumulus cells the testosterone levels increased significantly on adding these androgen substrates. In the type C/D cumulus, the testosterone increased to lower levels compared to type A cumulus cells. In the presence of these androgens progesterone secretion is significantly reduced in type A cumulus cells. In type C/D cumulus cells, however, progesterone levels were significantly higher than in type A. The estradiol-17β/testosterone and progesterone/estradiol-17β ratios, which partially resemble the degree of aromatase activity and the degree of selectivity for progesterone secretion, respectively, were higher in type C/D than in type A cumulus cells.

Conclusions: In type C/D cumulus the significant increase in estradiol-17β secretion in the presence of various androgens suggests that, under basal conditions, androgen is less available for estradiol-17β biosynthesis compared to type A cumulus. Furthermore, the higher progesterone secretion in type C/D cumulus may suggest that the follicles yielding type C/D cumulus cells are more mature than the follicles yielding type A cumulus.

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  1. Hela Gitay-Goren

    Present address: Department of Biology, Technion-Israel Institute of Technology, Technion City, 32000, Haifa, Israel

Affiliations

  1. Department of Obstetrics and Gynecology, Rambam Medical Center, Haifa, Israel

    Shalom Bar-Ami

  2. The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel

    Shalom Bar-Ami, Avital Regev & Hela Gitay-Goren

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  1. Shalom Bar-Ami
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  2. Avital Regev
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  3. Hela Gitay-Goren
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Bar-Ami, S., Regev, A. & Gitay-Goren, H. Effect of androgen substrates on the steroidogenic pattern of cumulus cells: Correlation with cumulus culture morphology. J Assist Reprod Genet 14, 270–276 (1997). https://doi.org/10.1007/BF02765828

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  • DOI: https://doi.org/10.1007/BF02765828

Key words

  • androgen
  • cumulus cells
  • estradiol-17β
  • progesterone