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Isolation and Culture Expansion of Tumor-specific Endothelial Cells
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Endothelial Cells May Have Tissue-Specific Origins.

Kristina I Boström1,2, Jiayi Yao1, Xiuju Wu1

  • 1Division of Cardiology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-1679, U.S.A.

Journal of Cell Biology and Histology
|July 6, 2018
PubMed
Summary

Tissue-specific endothelial cells (ECs) co-express lineage markers of surrounding cells. Genetic deletion of fetal liver kinase-1 (Flk1) in lung epithelium suppressed pulmonary ECs, suggesting shared progenitors for ECs and tissue cells.

Keywords:
DifferentiationEndothelial cellsHeterogeneityTissue-specific

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Area of Science:

  • Developmental biology
  • Cell biology
  • Vascular biology

Background:

  • Endothelial cells (ECs) exhibit significant functional heterogeneity across different tissues.
  • The developmental origins of this endothelial heterogeneity remain largely unknown.
  • Understanding EC origins is crucial for regenerative medicine and disease research.

Purpose of the Study:

  • To investigate the developmental origins of tissue-specific endothelial cells.
  • To determine if endothelial cells share progenitor cells with other tissue-specific cells.
  • To elucidate the mechanisms underlying endothelial heterogeneity.

Main Methods:

  • Analysis of co-expression of lineage markers in tissue-specific ECs from lung, brain, and liver at early developmental stages.
  • Utilizing a genetic model (Nkx2.1-Cre) for pulmonary epithelial-specific deletion of fetal liver kinase-1 (Flk1).
  • Assessing the impact of gene deletion on pulmonary EC populations.

Main Results:

  • Tissue-specific ECs were found to co-express lineage markers of their coordinating tissue-specific cells early in development.
  • Pulmonary EC populations were significantly suppressed following the deletion of Flk1 in lung epithelial cells.
  • These findings indicate a potential shared developmental origin for ECs and tissue-specific cells.

Conclusions:

  • Tissue-specific endothelial cells may originate from the same progenitor cells as tissue-specific cells.
  • Early co-expression of lineage markers suggests a close developmental relationship.
  • This study provides novel insights into the developmental basis of endothelial heterogeneity.