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Related Experiment Videos

Lymphangiogenesis and tumor metastasis.

Riccardo E Nisato1, Jean-Christophe Tille, Michael S Pepper

  • 1Department of Morphology, University Medical Center, Geneva, Switzerland.

Thrombosis and Haemostasis
|September 30, 2003
PubMed
Summary

Vascular endothelial growth factor-C (VEGF-C) promotes cancer spread to lymph nodes. In human tumors, VEGF-C may activate existing lymphatics for metastasis, rather than forming new ones.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Elevated vascular endothelial growth factor-C (VEGF-C) in primary tumors correlates with lymph node metastasis in human cancers.
  • Animal models show VEGF-C drives tumor lymphangiogenesis and metastasis.
  • Limited evidence exists for lymphangiogenesis in human tumors, contrasting with animal models.

Purpose of the Study:

  • To investigate the role of VEGF-C in human tumor metastasis, particularly in light of discrepancies between animal models and human tumor observations.
  • To explore alternative mechanisms by which VEGF-C may contribute to lymph node metastasis beyond lymphangiogenesis.

Main Methods:

  • Review of existing literature correlating VEGF-C expression with metastasis in human cancers.
  • Analysis of data from transgenic mouse models overexpressing VEGF-C.
  • Examination of xenotransplantation studies using VEGF-C-expressing tumor cells.

Main Results:

  • A strong correlation between primary tumor VEGF-C levels and lymph node metastasis is observed in humans.
  • Animal models demonstrate VEGF-C's role in tumor lymphangiogenesis and metastasis.
  • Human tumors show minimal evidence of lymphangiogenesis, suggesting alternative VEGF-C functions.

Conclusions:

  • VEGF-C's role in human cancer metastasis may involve activating pre-existing lymphatic vessels.
  • This activation facilitates tumor cell chemotaxis, intravasation, and dissemination.
  • A reciprocal interaction between tumor cells and lymphatic endothelial cells likely drives lymph node metastasis.

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