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Blood-brain barrier dysfunction in aging is mediated by brain endothelial senescence
João P Novo1,2,3, Lucy Gee4, Carolina A Caetano1,3
1CNC-UC Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.
Aging Cell
|August 15, 2024
Summary
Brain endothelial cell senescence contributes to the aging of the blood-brain barrier (BBB), increasing its permeability. This cellular aging process is a key factor in BBB dysfunction during aging.
Area of Science:
- Neuroscience
- Cell Biology
- Aging Research
Background:
- Aging leads to blood-brain barrier (BBB) dysfunction, marked by increased permeability and altered brain endothelial cells (BECs).
- Dysregulation of tight junctions in BECs is a hallmark of BBB aging.
Purpose of the Study:
- To investigate the specific role of brain endothelial cell (BEC) senescence in the dysfunction of the blood-brain barrier (BBB) during aging.
Main Methods:
- Examined phenotypic alterations in BECs associated with aging.
- Assessed the expression of tight junction proteins in BECs.
- Investigated the link between BEC senescence and BBB permeability.
Main Results:
- BEC senescence was identified as a significant factor in BBB aging.
- Senescence correlates with increased BBB permeability.
- Phenotypic changes in BECs are linked to senescence.
Conclusions:
- BEC senescence plays a crucial role in the transition from a young to an aged BBB.
- Targeting BEC senescence may offer therapeutic strategies for age-related BBB dysfunction.
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