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Related Experiment Videos

Synemin expression in developing normal and pathological human retina and lens.

Marcel Tawk1, Matthias Titeux, Catherine Fallet

  • 1Biologie moléculaire de la différenciation, Université Paris 7, case postale 7136, 2 place Jussieu, 75005, Paris, France.

Experimental Neurology
|October 14, 2003
PubMed
Summary

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Synemin, an intermediate filament protein, plays a crucial role in human eye development. Its altered expression in Walker-Warburg syndrome highlights its importance in retinal and lens morphogenesis.

Area of Science:

  • Developmental biology
  • Cell biology
  • Ophthalmology

Background:

  • Synemin (Syn) is an intermediate filament (IF) protein.
  • Intermediate filaments are crucial for cellular structure and function.
  • Understanding Synemin's role in development is essential for insights into congenital disorders.

Purpose of the Study:

  • To investigate the morphogenetic role of Synemin in the developing human retina and lens.
  • To compare Synemin expression patterns with other IF proteins.
  • To examine Synemin expression in fetuses with genetic developmental disorders.

Main Methods:

  • Immunohistochemical analysis of Synemin expression in human fetal retina and lens.
  • Comparison of Synemin expression in normal development versus fetuses with Walker-Warburg syndrome, Meckel syndrome, and trisomy 13.

Related Experiment Videos

  • Colocalization studies with vimentin, glial fibrillary acidic protein (GFA), and neurofilaments (NF).

    • Main Results:

    • Synemin expression in the retina begins in the NFL and GCL at 15 weeks and expands to other layers by 28 weeks, often colocalizing with vimentin, GFA, or NF.
    • In Walker-Warburg syndrome, Synemin expression in the retina is reduced, while vimentin expression is increased, and Synemin expression in the lens is also affected.
    • Synemin expression in the lens is uniform initially, becoming stronger in the anterior epithelium later in development.

    Conclusions:

    • Synemin acts as a key cross-linking protein, connecting different cytoskeletal structures.
    • Altered Synemin expression in Walker-Warburg syndrome suggests a significant role in retinal and lens morphogenesis.
    • Synemin's expression patterns provide insights into normal eye development and the pathogenesis of certain developmental syndromes.