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Sphingosine pathway deregulation in endometriotic tissues.

Pietro Santulli1, Louis Marcellin, Jean-Christophe Noël

  • 1Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, AP- HP, Groupe Hospitalier Universitaire Ouest, Centre Hospitalier Universitaire Cochin Saint Vincent de Paul, Department of Gynecology Obstetrics II and Reproductive Medicine, Paris, France. pietro.santulli@inserm.fr

Fertility and Sterility
|January 27, 2012
PubMed
Summary

Gene expression in the sphingosine-1-phosphate pathway is deregulated in endometriosis, suggesting a role in disease development and survival. Key enzymes and receptors show altered expression in endometriotic tissues, impacting sphingosine-1-phosphate metabolism.

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Area of Science:

  • Endocrinology and Metabolism
  • Molecular Biology
  • Gynecology

Background:

  • Endometriosis is a complex gynecological condition characterized by the presence of endometrial tissue outside the uterus.
  • The sphingosine-1-phosphate (S1P) pathway plays crucial roles in cellular processes, including inflammation and cell survival.
  • Dysregulation of the S1P pathway has been implicated in various diseases, but its specific role in endometriosis remains incompletely understood.

Purpose of the Study:

  • To investigate the expression of key genes involved in the sphingosine-1-phosphate pathway within endometriotic tissues.
  • To compare gene expression profiles between women with and without endometriosis.
  • To elucidate the potential role of S1P pathway dysregulation in the pathogenesis and maintenance of endometriosis.

Main Methods:

  • A case-control laboratory study involving 31 women (16 with endometriosis, 15 disease-free).
  • Endometrial specimens were obtained from participants after surgical excision and pathological analysis.
  • Quantitative real-time PCR (qPCR) was used to measure messenger RNA (mRNA) expression of SPHK1-2, SGPP1-2, SGPL1, SPHKAP, and S1PR1-5.
  • Immunohistochemistry was employed to further investigate S1PR1 and S1PR2 protein expression.

Main Results:

  • Significant downregulation of SGPP2 expression was observed in both eutopic and ectopic endometriotic tissues.
  • SGPP1 expression was upregulated but remained low in endometriosis.
  • SGPL1 expression decreased in ectopic endometrium, while SPHKAP expression increased.
  • Expression of S1P receptors (S1PR1, S1PR2, S1PR3) showed differential regulation, with increased S1PR1 and S1PR2 expression confirmed at the protein level.

Conclusions:

  • The sphingosine-1-phosphate pathway is heavily deregulated in endometriotic lesions, characterized by decreased S1P catabolism.
  • Altered expression of S1P pathway enzymes and receptors suggests a significant role in the establishment and survival of endometriotic tissues.
  • These findings highlight the S1P pathway as a potential therapeutic target for endometriosis.