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Reproductive biology and endocrinology : RB&E2006; 4; 62; doi: 10.1186/1477-7827-4-62

Influence of mycotoxin zearalenone and its derivatives (alpha and beta zearalenol) on apoptosis and proliferation of cultured granulosa cells from equine ovaries.

Abstract: The mycotoxin zearalenone (ZEA) and its derivatives, alpha and beta-zearalenol (alpha and beta-ZOL), synthesized by genera Fusarium, often occur as contaminants in cereal grains and animal feeds. The importance of ZEA on reproductive disorders is well known in domestic animals species, particularly in swine and cattle. In the horse, limited data are available to date on the influence of dietary exposure to ZEA on reproductive health and on its in vitro effects on reproductive cells. The aim of this study was to evaluate the effects of ZEA and its derivatives, alpha and beta-ZOL, on granulosa cells (GCs) from the ovaries of cycling mares. Methods: The cell proliferation was evaluated by using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test after 3 days exposure at different concentrations of ZEA and its derivatives (from 1 x 10-7 to 0.1 microM). The apoptosis induction was evaluated after 1 day exposure, by DNA analysis using flow cytometry. Results: An increase in cell proliferation with respect to the control was observed in the presence of ZEA at 1 x 10-3 and 1 x 10-4 microM and apoptosis was induced by all mycotoxins at different concentrations. Conclusions: The simultaneous presence of apoptosis and proliferation in GC cultures treated with zearalenones could indicate that these mycotoxins could be effective in inducing follicular atresia. These effects of zearalenones may result from both direct interaction with oestrogen-receptors as well as interaction with the enzymes 3alpha (beta)-hydroxysteroid dehydrogenase (HSD), involved in the synthesis and metabolism of endogenous steroid hormones. These cellular disturbances, described for the first time in equine GCs cultured in vitro, could be hypothesized as referred to reproductive failures of unknown ethiology in the mare.
Publication Date: 2006-11-30 PubMed ID: 17137489PubMed Central: PMC1697814DOI: 10.1186/1477-7827-4-62Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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This research investigated the impact of a mycotoxin called zearalenone (ZEA) and its derivatives on the cell growth and mortality in the ovaries of horses. The mycotoxin was found to boost proliferation and accelerate cell death (apoptosis), which could potentially lead to reproductive issues.

Mycotoxins and Their Effects

  • Zearalenone (ZEA) and its derivatives, alpha and beta-zearalenol (alpha and beta-ZOL), are mycotoxins synthesized by the Fusarium genus. These contaminants are found in cereal grains and animal feeds.
  • ZEA’s impact on reproductive issues has been extensively studied in animals like swine and cattle, but little data is available on its effects on horses.

Objectives

  • This study investigates the effects of ZEA and its derivatives on ovarian granulosa cells (GCs) in horses, primarily focusing on cell proliferation and apoptosis.

Methods

  • Cell proliferation was measured using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test after exposing the cells to various concentrations of ZEA and its derivatives for three days.
  • A DNA analysis using flow cytometry was conducted to determine apoptosis induction after a one-day exposure.

Results

  • ZEA at concentrations of 1 x 10-3 and 1 x 10-4 microM stimulated cell proliferation above control levels.
  • All mycotoxins induced apoptosis at different concentrations.

Conclusions

  • The concurrent increase in cell proliferation and apoptosis in cultures treated with zearalenones suggests that these mycotoxins could induce follicular atresia, a condition that leads to the degradation of ovarian follicles.
  • Zearalenones’ effects might arise from direct interaction with estrogen receptors and the enzymes 3alpha (beta)-hydroxysteroid dehydrogenase (HSD), which participate in the synthesis and metabolism of endogenous steroid hormones.
  • The results, being the first of this nature in equine granulosa cells cultured in vitro, hint towards an association with the unexplained reproductive failures in horses.

Cite This Article

APA
Minervini F, Giannoccaro A, Fornelli F, Dell'Aquila ME, Minoia P, Visconti A. (2006). Influence of mycotoxin zearalenone and its derivatives (alpha and beta zearalenol) on apoptosis and proliferation of cultured granulosa cells from equine ovaries. Reprod Biol Endocrinol, 4, 62. https://doi.org/10.1186/1477-7827-4-62

Publication

ISSN: 1477-7827
NlmUniqueID: 101153627
Country: England
Language: English
Volume: 4
Pages: 62

Researcher Affiliations

Minervini, Fiorenza
  • Institute of Sciences of Food Production (ISPA), National Research Council (CNR), Via Amendola 122/O, 70124 Bari, Italy. fiorenza.minervini@ispa.cnr.it
Giannoccaro, Alessandra
    Fornelli, Francesca
      Dell'Aquila, Maria Elena
        Minoia, Paolo
          Visconti, Angelo

            MeSH Terms

            • Animal Feed
            • Animals
            • Apoptosis / drug effects
            • Cell Division / drug effects
            • Cells, Cultured
            • DNA / metabolism
            • Estrogens, Non-Steroidal / pharmacology
            • Female
            • Flow Cytometry
            • Follicular Atresia / drug effects
            • Food Contamination
            • Granulosa Cells / cytology
            • Granulosa Cells / drug effects
            • Horses
            • Zearalenone / pharmacology
            • Zeranol / analogs & derivatives
            • Zeranol / pharmacology

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            This article has been cited 12 times.
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