1. Academic Validation
  2. Senolysis potentiates endothelial progenitor cell adhesion to and integration into the brain vasculature

Senolysis potentiates endothelial progenitor cell adhesion to and integration into the brain vasculature

  • Stem Cell Res Ther. 2024 Nov 11;15(1):413. doi: 10.1186/s13287-024-04042-2.
Tri Duc Lam 1 2 István Tóth 1 3 Anca Hermenean 4 Imola Wilhelm 1 4 Claudine Kieda # 5 6 István Krizbai # 7 8 9 Attila E Farkas # 10
Affiliations

Affiliations

  • 1 Institute of Biophysics, HUN-REN Biological Research Centre, Szeged, 6726, Hungary.
  • 2 Doctoral School of Biology, University of Szeged, Szeged, 6726, Hungary.
  • 3 Foundation for the Future of Biomedical Sciences in Szeged, Szeged Scientists Academy, Szeged, 6720, Hungary.
  • 4 Institute of Life Sciences, "Vasile Goldis" Western University of Arad, Arad, 310414, Romania.
  • 5 Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine-National Research Institute, Warsaw, 04-141, Poland.
  • 6 Centre for Molecular Biophysics, UPR 4301 CNRS, Orleans, 45071, France.
  • 7 Institute of Biophysics, HUN-REN Biological Research Centre, Szeged, 6726, Hungary. krizbai.istvan@brc.hu.
  • 8 Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, 6726, Hungary. krizbai.istvan@brc.hu.
  • 9 Institute of Life Sciences, "Vasile Goldis" Western University of Arad, Arad, 310414, Romania. krizbai.istvan@brc.hu.
  • 10 Institute of Biophysics, HUN-REN Biological Research Centre, Szeged, 6726, Hungary. farkas.attilae@brc.hu.
  • # Contributed equally.
Abstract

Background: One of the most severe consequences of ageing is cognitive decline, which is associated with dysfunction of the brain microvasculature. Thus, repairing the brain vasculature could result in healthier brain function.

Methods: To better understand the potential beneficial effect of endothelial progenitor cells (EPCs) in vascular repair, we studied the adhesion and integration of EPCs using the early embryonic mouse aorta-gonad-mesonephros - MAgEC 10.5 endothelial cell line. The EPC interaction with brain microvasculature was monitored ex vivo and in vivo using epifluorescence, laser confocal and two-photon microscopy in healthy young and old Animals. The effects of senolysis, EPC activation and ischaemia (two-vessel occlusion model) were analysed in BALB/c and FVB/Ant: TgCAG-yfp_sb #27 mice.

Results: MAgEC 10.5 cells rapidly adhered to brain microvasculature and some differentiated into mature endothelial cells (ECs). MAgEC 10.5-derived endothelial cells integrated into microvessels, established tight junctions and co-formed vessel lumens with pre-existing ECs within five days. Adhesion and integration were much weaker in aged mice, but were increased by depleting senescent cells using abt-263 or dasatinib plus quercetin. Furthermore, MAgEC 10.5 cell adhesion to and integration into brain vessels were increased by ischaemia and by pre-activating EPCs with TNFα.

Conclusions: Combining progenitor cell therapy with senolytic therapy and the prior activation of EPCs are promising for improving EPC adhesion to and integration into the cerebral vasculature and could help rejuvenate the ageing brain.

Keywords

Abt-263; Ageing; Brain; Dasatinib; Embryonic endothelial progenitor cells; Hypoxia; Navitoclax; Quercetin; Senescence; Senolysis; Vascular regeneration.

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