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A Method for Labeling Vasculature in Embryonic Mice
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Homeobox genes in normal and abnormal vasculogenesis.

M Cantile1, G Schiavo, L Terracciano

  • 1Department of Clinical and Experimental Medicine, Federico II University Medical School, Naples, Italy.

Nutrition, Metabolism, and Cardiovascular Diseases : NMCD
|November 18, 2008
PubMed
Summary

Homeobox (HOX) genes regulate cardiovascular development and remodelling. Dysregulation is linked to vascular diseases, suggesting HOX genes

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Homeobox (HOX) genes are transcription factors crucial for embryonic development, controlling cell identity, division, and differentiation.
  • Class I human HOX genes exhibit a unique genomic organization across four chromosomal loci, forming 13 paralogous groups.
  • The cardiovascular system, including blood and lymphatic vascular systems, originates from mesoderm and is intricately regulated by HOX genes.

Purpose of the Study:

  • To review the current understanding of HOX gene roles in normal and abnormal vasculogenesis.
  • To explore the involvement of HOX genes in cardiovascular remodelling during both physiological and pathological processes.
  • To propose a molecular mechanism for HOX gene involvement in endothelial phenotype modification.

Main Methods:

  • Literature review of studies on HOX genes in cardiovascular development and disease.
  • Analysis of genomic organization and paralogous group relationships of human HOX genes.
  • Postulation of a molecular mechanism involving nuclear export of specific transcripts.

Main Results:

  • HOX genes are implicated in cardiovascular remodelling in adult physiology (e.g., wound healing) and pathology (e.g., atherosclerosis, tumor angiogenesis).
  • Understanding HOX gene function in endothelial and smooth muscle cells is vital for vascular cell differentiation.
  • A common mechanism involving HOX-regulated nuclear export of transcripts may drive endothelial phenotype changes.

Conclusions:

  • HOX genes play a critical role in regulating vascular cell differentiation and phenotype.
  • Dysregulation of HOX genes contributes to vascular pathologies, presenting therapeutic targets.
  • A conserved molecular mechanism involving transcript nuclear export may underlie HOX gene function in angiogenesis.