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Ectopic and eutopic stromal endometriotic cells have a damaged ceramide signaling pathway to apoptosis

Agnieszka Chrobak1, Urszula Sieradzka, Rafał Sozański

  • 1Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland. chrobak@iitd.pan.wroc.pl

Fertility and Sterility
|November 21, 2008
PubMed
Abstract

Insights

Sphingosine analogues induce apoptosis in healthy endometrial cells but are less effective in ectopic and eutopic endometriotic cells. This suggests a damaged apoptosis pathway in endometriosis, impacting treatment strategies.

Area of Science:

  • Cell biology
  • Molecular medicine
  • Gynecology

Background:

  • Endometriosis is a condition characterized by the presence of endometrial tissue outside the uterus.
  • The ceramide signaling pathway plays a crucial role in apoptosis (programmed cell death).
  • Sphingosine analogues are compounds that can activate this pathway.

Purpose of the Study:

  • To determine if sphingosine analogues can induce apoptosis in ectopic endometrial cells (EEC), eutopic stromal endometriotic cells (EEU), and healthy eutopic stromal endometrial cells (HEU).
  • To investigate the potential of sphingosine analogues as a therapeutic agent for endometriosis by examining their effect on different endometrial cell types.

Main Methods:

  • Endometrial cells (EEC, EEU, HEU) were isolated from women with and without endometriosis.
  • Cells were cultured and treated with varying concentrations of sphingosine analogues for 48 hours.
  • Cell viability was assessed using the MTT assay.
  • Apoptosis and cell cycle progression were analyzed via fluorescence-activated cell sorting (FACS).

Main Results:

  • Sphingosine analogues significantly reduced the viability of healthy eutopic endometrial cells (HEU) compared to ectopic (EEC) and eutopic stromal endometriotic cells (EEU).
  • The apoptotic level was significantly higher in HEU cells treated with sphingosine analogues than in EEC and EEU cells.
  • EEC and EEU cells showed a less pronounced apoptotic response to sphingosine analogues, indicating potential resistance.

Conclusions:

  • Ectopic and eutopic stromal endometriotic cells from women with endometriosis exhibit a defect in the ceramide-dependent apoptosis pathway.
  • This impaired apoptotic pathway in endometriosis may contribute to the disease's persistence and resistance to certain therapies.
  • Targeting the ceramide pathway or sphingosine analogues may require different strategies for treating endometriosis effectively.

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