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Reduced Ang2 expression in aging endothelial cells.

P J Hohensinner1, B Ebenbauer2, C Kaun1

  • 1Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria.

Biochemical and Biophysical Research Communications
|May 4, 2016
PubMed
Summary
This summary is machine-generated.

Aging impairs endothelial cell migration by increasing quiescence protein Ang1 and decreasing activation protein Ang2. Restoring Ang2 levels in older cells improved their movement, suggesting a role in wound healing.

Keywords:
AgingAngiopoietinEndothelial cellMigrationWound healing

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Area of Science:

  • Cell biology
  • Gerontology
  • Vascular biology

Background:

  • Aging endothelial cells exhibit larger size, shorter telomeres, and elevated pro-inflammatory cytokines.
  • Endothelial cell migration is reduced with age.

Purpose of the Study:

  • To investigate the impact of aging on endothelial cell migration and the role of the Angiopoietin (Ang) system.
  • To determine if Angiopoietin-2 (Ang2) supplementation can restore migratory function in aged endothelial cells.

Main Methods:

  • Comparative analysis of aged and young endothelial cells.
  • Assessment of cell size, telomere length, cytokine expression, and migratory distance.
  • Measurement of Angiopoietin-1 (Ang1) and Angiopoietin-2 (Ang2) levels.
  • Functional assay involving Ang2 supplementation to aged cells.

Main Results:

  • Aging increased endothelial cell size and pro-inflammatory cytokine expression while reducing telomere length and migratory distance.
  • Aged cells showed increased Ang1 (quiescence) and decreased Ang2 (activation).
  • Supplementation with Ang2 significantly restored the migratory capacity of aged endothelial cells.

Conclusions:

  • Aging shifts the Angiopoietin (Ang) 1/Ang2 balance towards a quiescent endothelial state.
  • Enhanced endothelial cell activation, potentially via Ang2, may be crucial for improving wound healing in aging individuals.