Histochemistry and Cell Biology

, Volume 121, Issue 6, pp 501–508 | Cite as

Binding of galectin-1 (gal-1) on trophoblast cells and inhibition of hormone production of trophoblast tumor cells in vitro by gal-1

  • Udo Jeschke
  • Toralf Reimer
  • Claudia Bergemann
  • Irmi Wiest
  • Sandra Schulze
  • Klaus Friese
  • Hermann Walzel
Original Paper

Abstract

Galectin-1 (gal-1), a member of the mammalian β-galactoside-binding proteins, recognizes preferentially Galβ1–4GlcNAc sequences of oligosaccharides associated with several cell surface glycoconjugates. As demonstrated histochemically, the lectin recognizes appropriate glycoepitopes on the syncytiotrophoblast and on chorionic carcinoma cells (BeWo). Freshly isolated trophoblast cells and trophoblast tumor cells Jeg3 did not bind gal-1. BeWo cells in contrast to Jeg3 form a syncytium in vitro and synthesize progesterone as well as hCG. BeWo cells were used as an approach to study the effects of gal-1 on hormone production. The lectin decreased cellular hCG and progesterone production as well as hCGβ gene transcription as measured by real-time RT-PCR. Gal-1 mediated inhibition of cellular progesterone production was reduced in the presence of a Thomsen-Friedenreich (TF)–polyacrylamide conjugate. Inhibition of cellular hCG and progesterone production was also induced by anti-TF monoclonal antibodies. The results demonstrate that ligation of Galβ1–4GlcNAc and Galβ1–3GalNAc (TF) epitopes on BeWo cells may have regulatory effects on hCG and progesterone production.

Keywords

Galectin-1 Glycotopes Hormone production BeWo cells 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Udo Jeschke
    • 1
  • Toralf Reimer
    • 2
  • Claudia Bergemann
    • 2
  • Irmi Wiest
    • 1
  • Sandra Schulze
    • 1
  • Klaus Friese
    • 1
  • Hermann Walzel
    • 3
  1. 1.Department of Obstetrics and GynaecologyLudwig Maximilians University of MunichMunichGermany
  2. 2.Department of Obstetrics and GynaecologyUniversity of RostockRostockGermany
  3. 3.Institute of Medical Biochemistry and Molecular BiologyUniversity of RostockRostockGermany

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