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Related Experiment Videos

Mouse model of angiogenesis

T Couffinhal1, M Silver, L P Zheng

  • 1Department of Medicine (Cardiology), St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston Massachusetts 02135, USA.

The American Journal of Pathology
|June 17, 1998
PubMed
Summary
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Vascular endothelial growth factor (VEGF) drives therapeutic angiogenesis in ischemic muscle. This study confirms VEGF

Area of Science:

  • Cardiovascular Biology
  • Regenerative Medicine
  • Molecular Biology

Background:

  • Therapeutic angiogenesis aims to restore blood flow to ischemic tissues.
  • Vascular endothelial growth factor (VEGF) is a key regulator of blood vessel formation.
  • Endogenous VEGF's role in ischemic neovascularization requires further investigation.

Purpose of the Study:

  • To investigate the role of endogenous VEGF in postnatal collateral vessel development in ischemic hindlimb tissue.
  • To establish and characterize a murine model of hindlimb ischemia for studying angiogenesis.

Main Methods:

  • Developed a mouse model by ligating and excising the femoral artery.
  • Utilized Laser Doppler Perfusion Imaging (LDPI) to assess blood flow recovery.
  • Performed morphometric analysis of capillary density and endothelial cell proliferation (bromodeoxyuridine staining).

Related Experiment Videos

  • Quantified VEGF mRNA and protein expression.
  • Administered a neutralizing VEGF antibody to assess dependency.
  • Main Results:

    • Hindlimb ischemia led to reduced blood flow, followed by progressive recovery over 28 days.
    • Neovascularization, evidenced by increased capillary density and endothelial cell proliferation, temporally correlated with blood flow restoration.
    • VEGF mRNA and protein expression were upregulated in the ischemic hindlimb.
    • Administration of a VEGF neutralizing antibody impaired neovascularization, confirming VEGF's essential role.

    Conclusions:

    • VEGF acts as an endogenous regulator of angiogenesis in ischemic tissues.
    • The developed murine model effectively demonstrates VEGF-dependent therapeutic angiogenesis in vivo.
    • This model provides a platform for studying gene targeting effects on nutrient angiogenesis.