Amyloid β interferes with wound healing of brain microvascular endothelial cells by disorganizing the actin cytoskeleton.

Document Type

Article

Abstract

Cerebral amyloid angiopathy (CAA) is a disease in which amyloid β (Aβ) is deposited in the cerebral blood vessels, reducing compliance, tearing and weakening of vessel walls, leading to cerebral hemorrhage. The mechanisms by which Aβ leads to focal wall fragmentation and intimal damage are not well understood. We analyzed the motility of human brain microvascular endothelial cells (hBMECs) in real-time using a wound-healing assay. We observed the suppression of cell migration by visualizing Aβ aggregation using quantum dot (QD) nanoprobes. In addition, using QD nanoprobes and a SiR-actin probe, we simultaneously observed Aβ aggregation and F-actin organization in real-time for the first time. Aβ began to aggregate at the edge of endothelial cells, reducing cell motility. In addition, Aβ aggregation disorganized the actin cytoskeleton and induced abnormal actin aggregation. Aβ aggregated actively in the anterior group, where cell motility was active. Our findings may be a first step toward explaining the mechanism by which Aβ causes vascular wall fragility, bleeding, and rebleeding in CAA.

Keywords

Humans, Endothelial Cells, Amyloid beta-Peptides, Actins, Brain, Actin Cytoskeleton

Medical Subject Headings

Humans; Endothelial Cells; Amyloid beta-Peptides; Actins; Brain; Actin Cytoskeleton

Publication Date

3-1-2024

Publication Title

Experimental cell research

ISSN

1090-2422

Volume

436

Issue

1

First Page

113958

Last Page

113958

PubMed ID

38325585

Digital Object Identifier (DOI)

10.1016/j.yexcr.2024.113958

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