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Endothelial cell senescence inhibits unidirectional endothelialization in vitro
1Department of Bioengineering, National Cardiovascualr Center Research Institute, Osaka, Japan.
Cell Transplantation
|January 1, 1992
Summary
Cellular senescence in endothelial cells (ECs) significantly impairs their ability to migrate and proliferate, hindering unidirectional endothelialization crucial for vascular repair.
Area of Science:
- Vascular Biology
- Cellular Aging
- Biomedical Engineering
Background:
- Endothelialization is vital for vascular graft success.
- Cellular senescence is linked to aging and disease.
- Understanding senescence effects on endothelialization is critical.
Purpose of the Study:
- To investigate the impact of cellular senescence on unidirectional endothelialization in vitro.
- To analyze the effects of aging on endothelial cell morphology, proliferation, and migration.
- To simulate anastomotic endothelialization of vascular prostheses.
Main Methods:
- Utilized bovine aortic endothelial cells (ECs) at different cumulative population-doubling levels (CPDLs): young (22), middle-aged (46), and senescent (70).
- Employed a novel method to create a square monolayer sheet for quantifying unidirectional endothelialization rate.
- Performed time-lapsed videomicroscopy to observe endothelialization dynamics.
Main Results:
- Endothelial cell senescence significantly retarded proliferation and migration.
- Unidirectional endothelialization rates were reduced in senescent ECs.
- Cells behind the leading edge exhibited slower migration compared to leading-edge cells.
Conclusions:
- Cellular senescence impairs endothelial cell function, including migration and proliferation.
- Senescent endothelial cells reduce the capacity for unidirectional endothelialization.
- Atherosclerotic vessels with senescent or injured ECs may exhibit limited anastomotic endothelialization potential.