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Quantifying endothelial cell proliferation in the zebrafish embryo.

George Bowley1,2, Timothy Ja Chico1,2, Jovana Serbanovic-Canic1,2

  • 1Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK.

F1000Research
|February 27, 2023
PubMed
Summary

Time-lapse imaging in zebrafish embryos effectively quantifies endothelial cell proliferation, offering a sensitive alternative to traditional methods for vascular research. This model enhances biological relevance while reducing animal use.

Keywords:
Endothelial CellMicroscopyProliferationZebrafish

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Area of Science:

  • Vascular Biology
  • Developmental Biology
  • Biomedical Research Models

Background:

  • Endothelial cell (EC) proliferation is crucial for vascular development, homeostasis, and cardiovascular disease.
  • Rodent models are traditional but costly; *in vitro* models lack *in vivo* complexity.
  • Zebrafish embryos offer a genetically manipulable, optically transparent *in vivo* model for vascular research.

Purpose of the Study:

  • To evaluate the suitability of zebrafish embryos as a model for studying endothelial cell proliferation.
  • To compare the efficacy of different methods for quantifying EC proliferation in zebrafish embryos.

Main Methods:

  • Investigation of antibody and DNA labeling techniques for EC proliferation assessment.
  • Utilization of time-lapse imaging with fluorescent proteins targeted to endothelial nuclei.
  • Comparison of labeling methods against time-lapse imaging for sensitivity and applicability.

Main Results:

  • Antibody and DNA labeling methods showed limited utility due to low EC proliferation rates and narrow labeling windows.
  • Time-lapse imaging of fluorescently tagged endothelial nuclei proved to be a sensitive method for quantifying EC proliferation.
  • Time-lapse imaging captured more instances of EC proliferation than immunostaining or cell labeling alternatives.

Conclusions:

  • Time-lapse imaging is a suitable and sensitive method for analyzing endothelial cell proliferation in zebrafish embryos.
  • This approach provides greater biological relevance than *in vitro* models like HUVEC culture.
  • Zebrafish embryos with time-lapse imaging reduce animal usage in EC proliferation research and are ideal for screening genes or small molecules.