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Role of Id proteins in embryonic and tumor angiogenesis

R Benezra1

  • 1Cell Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. r-benezra@ski.mskcc.org

Trends in Cardiovascular Medicine
|October 24, 2001
PubMed

Insights

Id proteins are crucial for blood vessel formation (angiogenesis) in mice, impacting development and tumor growth. Their loss causes developmental defects and impairs tumor vascularization, suggesting new anti-angiogenic treatment targets.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Oncology

Background:

  • Id proteins are intracellular regulators that inhibit differentiation-promoting transcription factors.
  • Id proteins play a critical role in angiogenesis during embryogenesis and tumor formation.
  • Loss of Id function in mouse models leads to aberrant differentiation in neurons and endothelial cells.

Purpose of the Study:

  • To investigate the role of Id proteins in angiogenesis during embryogenesis and tumor formation.
  • To define subdivisions in the angiogenic process through analysis of Id knockout phenotypes.
  • To identify potential targets for selective anti-angiogenic therapies.

Main Methods:

  • Analysis of Id knockout mouse models.
  • Characterization of gene expression in Id knockout endothelium.
  • Phenotypic analysis of developmental and tumor vascularization defects.

Main Results:

  • Loss of Id function causes premature neural differentiation and mid-gestational brain hemorrhage in mice.
  • Reduced Id levels impair the ability of adult mice to support tumor vascularization.
  • Specific defects in the angiogenic process were identified in Id-deficient endothelium.

Conclusions:

  • Id proteins are essential for normal angiogenesis and vascular development.
  • Understanding Id protein function provides insights into selective anti-angiogenic strategies.
  • Targeting Id proteins may offer novel therapeutic approaches for cancer and other diseases.

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