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Related Experiment Videos

In vitro model for mouse coronary vasculogenesis.

Noriko Watanabe1, Masao Nakagawa, Takashi Hanato

  • 1Department of Pediatrics, Shiga University of Medical Science, Shiga, Japan. norikokakuko@nifty.com

The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology
|June 9, 2006
PubMed
Summary

Proepicardial organs contain precursor cells for coronary vessel formation. In vitro culture with fetal calf serum induced these cells to form tube-like structures, suggesting complex molecular regulation.

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Area of Science:

  • Developmental Biology
  • Vascular Biology
  • Cell Biology

Background:

  • Coronary vessel formation is crucial for heart development.
  • Understanding the molecular mechanisms of vasculogenesis is essential for regenerative medicine.

Purpose of the Study:

  • To investigate the in vitro molecular mechanisms of coronary vessel formation.
  • To identify precursor cells involved in coronary vasculature development.

Main Methods:

  • Explant cultures of mouse proepicardial organs (PEOs) were used.
  • Cells were cultured on collagen I, fibronectin, laminin, or collagen gel with fetal calf serum (FCS).
  • Gene expression was analyzed using reverse transcriptase-polymerase chain reaction.

Main Results:

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  • PEOs cultured with FCS formed cord-like structures and tube-like channels in collagen gel.
  • Cells forming these structures expressed platelet endothelial cell adhesion molecule (PECAM).
  • PECAM, basic fibroblast growth factor (bFGF), and smooth muscle 22-alpha (SM22alpha) expression was upregulated; Flk-1, Flt-1, and hepatocyte growth factor (HGF) were downregulated, while vascular endothelial growth factor (VEGF) remained constant.

Conclusions:

  • Proepicardial organs contain precursor cells for coronary vasculature.
  • Vasculogenesis in this model is regulated by multiple factors and requires components present in FCS, but not solely by individual growth factors like bFGF, VEGF, or HGF.