Researchers here make an effort to link the age-related accumulation of senescent cells in vascular tissue with some of the better known biochemistry of Alzheimer’s disease. Progressive vascular dysfunction is an important component of aging: loss of elasticity; failure to regulate blood pressure; failing constriction and dilation; the the corrosive growth of fatty atherosclerotic plaques that weaken and narrow blood vessels; increased amyloid deposition in blood vessel walls. In the brain particularly, failure to deliver sufficient oxygen and nutrients via the vascular system is a notable contributing factor in the onset of dementia, and a sizable fraction of Alzheimer’s patients also exhibit full-blown vascular dementia.
Recent studies have suggested that senescent cells have a larger role in vascular aging than was previously assumed, contributing to most of the line items noted above, and this open access paper continues that theme. One of the more interesting points of focus here is the generation of amyloid-β, a protein that accumulates in Alzheimer’s disease, in the vascular system, both inside and outside the brain. This appears to take place to a greater degree in senescent cells. It will be a most interesting new
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