Abstract
Amyloid beta accumulation in neuronal and cerebrovascular tissue is a key precursor to development of Alzheimer's disease and can result in neurodegeneration. While its persistence in Alzheimer's cases is well-studied, amyloid beta's direct effect on vascular function is unclear. Here, we measured the effect of amyloid beta treatment on vascular smooth muscle cell functional contractility and modeled the mechanoadaptive growth and remodeling response to these functional perturbations. We found that the amyloid beta 1-42 isoform induced a reduction in vascular smooth muscle cell mechanical output and reduced response to vasocontractile cues. These data were used to develop a thinwalled constrained mixture arterial model that suggests vessel growth, and remodeling in response to amyloid betamediated alteration of smooth muscle function leads to decreased ability of cerebrovascular vessels to vasodilate. These findings provide a possible explanation for the vascular injury and malfunction often associated with the development of neurodegeneration in Alzheimer's disease.
Original language | English (US) |
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Article number | 111007 |
Journal | Journal of biomechanical engineering |
Volume | 138 |
Issue number | 11 |
DOIs | |
State | Published - Nov 1 2016 |
Bibliographical note
Publisher Copyright:© Copyright 2016 by ASME.
Keywords
- Alzheimer's disease
- amyloid beta
- cerebral amyloid angiopathy
- growth and remodeling
- vascular smooth muscle cells