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Glycoconjugate expression changes during Rana dalmatina early development

C Faraldi1, C Falugi, S Fasulo

  • 1Istituto di Anatomia Comparata dell'Università di Genova, Italy.

European Journal of Histochemistry : EJH
|January 1, 1996
PubMed
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Glycoconjugate expression changes during amphibian development, particularly in ectodermal cells and extracellular matrix, are developmentally regulated. These molecules play stage-specific roles in early development and larval stages.

Area of Science:

  • Developmental Biology
  • Glycobiology
  • Cell Biology

Background:

  • Glycoconjugates are crucial for cell adhesion and morphogenetic movements.
  • Understanding their dynamic changes during embryonic development is essential.

Purpose of the Study:

  • To investigate the distribution and expression changes of glycoconjugates during amphibian (Rana dalmatina) development.
  • To elucidate the stage-specific roles of glycoconjugates in early development.

Main Methods:

  • Utilized FITC- or HRP-labeled lectins to detect glycoconjugates in embryos and larvae.
  • Examined labeling patterns on ectodermal cells, extracellular matrix, and derivatives at different developmental stages.
  • Assessed fibronectin-like molecule presence using immunoreactivity.

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Main Results:

  • During gastrulation, specific lectins (WGA, GSA-I, DBA, LTA) labeled ectodermal cells and extracellular matrix, with fibronectin-like molecules also detected.
  • Larval stages showed strong labeling of ectodermal derivatives (skin, CNS, eye, ear) by WGA, DBA, and LTA, with reduced or absent labeling by other lectins.
  • Fibronectin-like immunoreactivity diminished significantly in larval stages.

Conclusions:

  • Glycoconjugate expression on cell surfaces and in the extracellular matrix is developmentally regulated in amphibians.
  • Different glycoconjugates exhibit stage-specific functions during early development and larval differentiation.
  • These findings highlight the dynamic role of glycoconjugates in amphibian morphogenesis.