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Osmoregulation in Fishes

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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
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Related Experiment Video

Updated: Jul 6, 2026

Mechanical Vessel Injury in Zebrafish Embryos
06:38

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Published on: February 17, 2015

Keeping your vascular integrity: What can we learn from fish?

Aernout Luttun1, Peter Verhamme

  • 1Center for Molecular and Vascular Biology, KULeuven, Leuven, Belgium. aernaut.luttun@med.kuleuven.be

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|April 12, 2008
PubMed
Summary

Cellular inhibitor of apoptosis (cIAP)-1 prevents endothelial cell death, maintaining cardiovascular system integrity. Zebrafish models are crucial for studying vascular health and development.

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Published on: December 26, 2017

Area of Science:

  • Cardiovascular Biology
  • Developmental Biology
  • Cellular Biology

Background:

  • The cardiovascular system is vital for oxygen transport; its dysfunction is life-threatening.
  • Understanding cardiovascular development and homeostasis is crucial.
  • Zebrafish are increasingly utilized as a model organism for cardiovascular research.

Purpose of the Study:

  • To summarize factors influencing vascular integrity.
  • To elaborate on the utility of zebrafish in studying vascular integrity.
  • To highlight the role of BIRC2/cIAP-1 in preventing endothelial cell apoptosis.

Main Methods:

  • Literature review on vascular integrity factors.
  • Analysis of zebrafish model suitability for cardiovascular studies.
  • Discussion of BIRC2/cIAP-1 function in endothelial cells.

Main Results:

  • Baculovirus IAP repeat c2 (BIRC2), or cIAP-1, specifically inhibits apoptosis in endothelial cells (ECs).
  • Preservation of ECs by cIAP-1 is critical for maintaining vessel integrity.
  • Zebrafish serve as an effective model for investigating these vascular mechanisms.

Conclusions:

  • Vascular integrity is maintained by preventing endothelial cell apoptosis.
  • cIAP-1 plays a key role in preserving vascular integrity.
  • Zebrafish offer a powerful platform for studying cardiovascular development and disease.