In:
Circulation Research, Ovid Technologies (Wolters Kluwer Health), Vol. 129, No. 8 ( 2021-10)
Abstract:
Endothelial cells play a critical role in multiple cardiovascular diseases. Circulating CD34 + cells are believed to be endothelial progenitors that have been used to treat cardiovascular diseases. However, the exact identity and the role of CD34 + cells in vascular regeneration remains unclear. Objective: We aimed to investigate the exact identity and the role of CD34 + cells in vascular regeneration. Methods and Results: Compared with healthy arteries, CD34 expression percentage was significantly increased in diseased femoral arteries from patients. Using a guidewire-induced endothelial denudation model, we reported the transcriptional profiling of over 30 000 cells by single-cell RNA sequencing analysis and provided a cell atlas of normal and lesioned arteries in mouse, in which a heterogeneous population of CD34 + cells was revealed. Combining the inducible lineage tracing Cd34 -CreER T2 ;R26-tdTomato mouse model and bone marrow transplantation experiments, we showed that nonbone marrow CD34 + mesenchymal cells acquired endothelial cell fate in the injured femoral artery rather than preexiting endothelial cells, while bone marrow-derived CD34 + cells differentiated into immune cells locally after vessel injury. Depletion of nonbone marrow CD34 + cells using diphtheria toxin-induced cell ablation models exacerbate neointimal lesions of the injured vessel. Furthermore, isolated vascular adventitia CD34 + cells displayed endothelial differentiation, in which microRNA-21-Smad7-pSmad2/3 pathway regulated endothelial gene expression and function during differentiation. Conclusions: Our study provides a transcriptional and cellular landscape of vessels after endothelial denudation. Our findings suggest heterogeneous CD34 + cells serve as a contributor not only to endothelial regeneration but also an inflammatory response that may provide therapeutic insights into vascular diseases.
Type of Medium:
Online Resource
ISSN:
0009-7330
,
1524-4571
DOI:
10.1161/CIRCRESAHA.121.319494
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2021
detail.hit.zdb_id:
1467838-X
