Anatomy and Embryology

, Volume 184, Issue 2, pp 141–152 | Cite as

Uteroglobin in the developing rabbit conceptus in vivo and in vitro

  • D. R. Dannhorn
  • S. Gierhake
  • C. Kirchner
Article
Accepted:

Summary

Uteroglobin (UGL) was measured in day- 4 to day-10 rabbit conceptuses by a competitive ELISA. Levels in blastocyst fluid, tissues, coverings and in the early fetus were determined separately. The total amount of UGL increased from 18.4 ng to 6.8 μg per conceptus. The UGL content of individual day-6 blastocysts was studied in vitro. Culturing was carried out up to 60 h in Ham's F10 medium with polyvinylpyrrolidone as macromolecular component, with and without progesterone, and with progesterone plus estradiol. UGL was determined in the blastocyst fluids, tissues with coverings and in the culture media. After labelling with [35S]-methionine, protein patterns of total blastocysts and of culture media were analysed by two-dimensional gel electrophoresis and fluorography. The morphology of cultured blastocysts was examined by electron microscopy. During 60 h of culture, the blastocysts expanded in diameter by 84%, and released 19% of their initial UGL content into the medium, independent of the hormonal substitution. Neither de novo synthesis, nor degradation of UGL was found: the protein remained unlabelled in fluorography, and its total quantity was not significantly different from that of non-cultured controls. Trophoblast, endoderm and embryoblast cells showed well preserved cell organelles and intercellular junctions, while the morphological differentiation of the germ layer was inhibited.

Key words

Blastocyst Uteroglobin In vitro culture Progesterone ELISA Fluorography Rabbit 
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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • D. R. Dannhorn
    • 1
  • S. Gierhake
    • 1
  • C. Kirchner
    • 1
  1. 1.Department of BiologyPhilipps UniversityMarburgGermany

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