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Does Vitamin D play a role on Msx1 homeoprotein expression involving an endogenous antisense mRNA?

F Lézot1, A Coudert, S Petit

  • 1Laboratoire de Biologie Orofaciale et Pathologie, INSERM E 110, Institut Biomédical des Cordeliers, Université Paris 7, IFR58, 15-21 rue de l'Ecole de Médecine, 75006 Paris, France. flezot@infobiogen.fr

The Journal of Steroid Biochemistry and Molecular Biology
|July 1, 2004
PubMed

Insights

Vitamin D and Msx1 show cross-talk in regulating gene expression, impacting bone and tooth development. This discovery offers new insights into rickets and mineralized tissue diseases.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Endocrinology

Background:

  • The Msx1 homeobox gene is involved in various organ development and epithelial-mesenchymal interactions.
  • Many Msx1 target organs, including bone and tooth germ, are sensitive to Vitamin D.
  • While Vitamin D's effect on Msx2 is known, its influence on Msx1 remains uncharacterized.

Purpose of the Study:

  • To investigate the relationship between Vitamin D and Msx1.
  • To analyze Msx1 expression in the context of Vitamin D signaling pathways.

Main Methods:

  • Comparative analysis of Vitamin D receptor (VDR) and Msx1 protein expression.
  • Assessment of Msx1 expression in VDR null mutant mice.
  • Evaluation of Msx1 overexpression effects on VDR expression in odontoblast cells.

Main Results:

  • Evidence of cross-talk between Vitamin D and Msx1 regulatory pathways was found.
  • Msx1 overexpression reduced VDR expression in odontoblastic cells.
  • Msx1 sense transcript expression decreased in rickets models.

Conclusions:

  • Vitamin D and Msx1 signaling pathways interact, influencing gene expression.
  • These interactions are relevant to understanding the pathophysiology of rickets and mineralized tissue disorders.
  • Further research on Msx1 antisense transcripts in Vitamin D null mutants could be beneficial.

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