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Related Experiment Videos

Zebrafish angiogenesis: a new model for drug screening.

G N Serbedzija1, E Flynn, C E Willett

  • 1Phylonix Pharmaceuticals, Inc., Cambridge, MA 02139, USA. george@phylonix.com

Angiogenesis
|October 1, 2003
PubMed
Summary

The zebrafish embryo is a practical whole-animal model for screening anti-cancer drugs targeting angiogenesis. This model effectively visualizes blood vessel formation and responds to known inhibitors and growth factors.

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Area of Science:

  • Developmental biology
  • Cancer research
  • Pharmacology

Background:

  • Tumor growth necessitates angiogenesis, making its inhibition a key cancer therapy strategy.
  • Existing angiogenesis assays are complex and impractical for high-throughput drug screening.
  • The zebrafish offers a potential whole-animal model for evaluating anti-angiogenic compounds.

Purpose of the Study:

  • To validate the zebrafish embryo as a viable model for screening small molecules that inhibit angiogenesis.
  • To assess the dose-dependent effects of known angiogenesis inhibitors in zebrafish.
  • To confirm the responsiveness of zebrafish blood vessels to angiogenic stimuli.

Main Methods:

  • Developing zebrafish embryos were exposed to small molecules in culture media.

Related Experiment Videos

  • Subintestinal vessels (SIVs) were visualized microscopically to assess blood vessel formation.
  • Known angiogenesis inhibitors (SU5416, TNP470) and human VEGF were administered to embryos.

    • Main Results:

    • Both SU5416 and TNP470 reduced blood vessel formation in zebrafish embryos.
    • Short exposure to SU5416 blocked new vessel formation, while TNP470 required continuous exposure.
    • Human VEGF administration increased SIV formation, confirming embryo responsiveness.

    Conclusions:

    • The zebrafish embryo is a practical and effective whole-animal model for angiogenesis drug screening.
    • This model allows for the observation of dose-dependent effects of anti-angiogenic compounds.
    • Zebrafish vascular development is sensitive to both inhibition and stimulation of angiogenesis.