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Activation of Integrins01:15

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Related Experiment Video

Updated: May 9, 2026

Preparation Of Neovascular Tissues from Human Glioma Tissues for Quantitative Proteomics Analysis of Tumor Angiogenesis
09:33

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Published on: March 20, 2026

NG2 proteoglycan promotes tumor vascularization via integrin-dependent effects on pericyte function.

Weon-Kyoo You1, Fusanori Yotsumoto, Kenji Sakimura

  • 1Tumor Microenvironment and Metastasis Program, Sanford-Burnham Medical Research Institute, Cancer Center, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA, weonkyoo.you@hanwha.com.

Angiogenesis
|August 9, 2013
PubMed
Summary

The NG2 proteoglycan is crucial for blood vessel development in tumors. Its absence impairs pericyte-endothelial cell interactions, leading to leaky and hypoxic tumor vasculature.

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Last Updated: May 9, 2026

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Published on: March 20, 2026

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Area of Science:

  • Cell Biology
  • Vascular Biology
  • Cancer Research

Background:

  • The NG2 proteoglycan influences immature cell proliferation and migration.
  • The specific role of NG2 in pericyte-endothelial cell interactions remains unclear.

Purpose of the Study:

  • To investigate the function of NG2 in mediating pericyte-endothelial cell interactions within tumor vasculature.
  • To elucidate the molecular mechanisms underlying NG2's role in vascular development and function.

Main Methods:

  • Pericyte-specific NG2 ablation in intracranial B16F10 melanomas.
  • Pericyte/endothelial cell co-culture models with siRNA-mediated NG2 knockdown.
  • Analysis of vascular structure, endothelial junctions (ZO-1), basal lamina assembly, and β1 integrin activation.

Main Results:

  • Pericyte-specific NG2 ablation led to decreased pericyte ensheathment, diminished endothelial junctions, and reduced basal lamina assembly.
  • Tumor vessels exhibited reduced patency, increased leakiness, and enhanced intratumoral hypoxia.
  • NG2 knockdown in co-cultures impaired network formation, endothelial junction integrity, and β1 integrin activation in endothelial cells.

Conclusions:

  • NG2 is essential for proper pericyte-endothelial cell interactions and vascular integrity in tumors.
  • NG2 signaling influences endothelial cell junction formation and vascular basal lamina assembly.
  • NG2-dependent cross-talk with endothelial cells involves β1 integrin activation, impacting vascular function and hypoxia.