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Macrophage and granulosa interleukin-1 beta mRNA in human ovulatory follicles

V Machelon1, F Nome, I Durand-Gasselin

  • 1Institut National de la Santé et de la Recherche Médicale (INSERM), U-355 Maturation Gamétique et Fécondation, Institut Paris-Sud sur les Cytokines, Clamart, France.

Human Reproduction (Oxford, England)
|August 1, 1995
PubMed

Insights

Interleukin-1 beta (IL-1 beta) is produced by both ovarian granulosa cells and macrophages during ovulation. Macrophage presence enhances granulosa cell IL-1 beta production, suggesting a collaborative role in ovarian function.

Area of Science:

  • Reproductive biology
  • Immunology
  • Cell biology

Background:

  • Interleukin-1 beta (IL-1 beta) is implicated in ovarian function during ovulation.
  • The specific cellular sources of IL-1 beta within the human ovulatory follicle are not fully elucidated.
  • Both immune (macrophages) and non-immune (granulosa) cells are potential producers.

Purpose of the Study:

  • To evaluate the production of IL-1 beta and its mRNA by human granulosa cells and macrophages from ovulatory follicles.
  • To determine the contribution of each cell type to ovarian IL-1 beta synthesis.
  • To investigate the influence of macrophages on granulosa cell IL-1 beta production.

Main Methods:

  • Follicular aspirates from in-vitro fertilization patients were analyzed.
  • IL-1 beta and IL-1 beta mRNA concentrations were measured using radioimmunoassay and RT-PCR.
  • Macrophages were identified via immunocytochemistry and RT-PCR, and removed from granulosa cell cultures.
  • In-situ hybridization was used to detect IL-1 beta transcripts.

Main Results:

  • IL-1 beta and its mRNA were detected in follicular aspirates and granulosa-luteal cells.
  • Both highly purified granulosa cells and macrophages contained significant IL-1 beta transcripts.
  • Granulosa cell cultures with added macrophages showed a twofold increase in IL-1 beta reactive cells compared to cultures without macrophages.

Conclusions:

  • Both granulosa cells and macrophages actively participate in ovarian IL-1 beta production at ovulation.
  • Ovarian macrophages may be essential for stimulating granulosa cell IL-1 beta production.
  • This highlights a synergistic interaction between immune and somatic cells in regulating ovarian cytokine activity.

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