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Opiate receptor blockade on human granulosa cells inhibits VEGF release

Fabian Lunger1, Anni P Vehmas2, Barbara G Fürnrohr3

  • 1Department of Gynecologic Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Innsbruck, Austria.

Reproductive Biomedicine Online
|January 25, 2016
PubMed

Insights

Human granulosa cells express the main opioid receptor (OPRM1). Blocking OPRM1 signaling with naloxone significantly reduced vascular endothelial growth factor (VEGF) production, suggesting a therapeutic target for ovarian hyperstimulation syndrome.

Area of Science:

  • Reproductive Biology
  • Endocrinology
  • Cell Biology

Background:

  • Granulosa cells play a crucial role in ovarian function and follicle development.
  • Vascular Endothelial Growth Factor (VEGF) is vital for angiogenesis and is implicated in ovarian physiology.
  • The role of opioid signaling in human granulosa cells is not well understood.

Purpose of the Study:

  • To determine the presence of the main opioid receptor (OPRM1) on human granulosa cells.
  • To investigate the influence of exogenous opiates and antagonists on granulosa cell VEGF production via OPRM1.

Main Methods:

  • Human granulosa cells were isolated from women undergoing oocyte retrieval for IVF.
  • Experiments utilized the human granulosa cell line COV434.
  • OPRM1 presence was confirmed using Western blot and flow cytometry.
  • VEGF secretion was measured by ELISA after opiate antagonist treatment.

Main Results:

  • The study confirmed the presence of OPRM1 on human granulosa cells for the first time.
  • Naloxone, a specific OPRM1 antagonist, significantly reduced VEGF levels in both COV434 and granulosa-luteal cells (P < 0.01).

Conclusions:

  • Human granulosa cells express OPRM1, indicating a functional opioid signaling pathway.
  • Opioid signaling significantly influences granulosa cell VEGF production.
  • Targeting the OPRM1 pathway may offer novel therapeutic strategies for ovarian hyperstimulation syndrome.
Keywords:
OHSSOPRM1VEGFgranulosa cellsnaloxoneopioid receptor

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