MRI-based biomarkers of accelerated aging and dementia risk in midlife: how close are we?

Abstract:

:The global population is aging, leading to an increasing burden of age-related neurodegenerative disease. Efforts to intervene against age-related dementias in older adults have generally proven ineffective. These failures suggest that a lifetime of brain aging may be difficult to reverse once widespread deterioration has occurred. To test interventions in younger populations, biomarkers of brain aging are needed that index subtle signs of accelerated brain deterioration that are part of the putative pathway to dementia. Here I review potential MRI-based biomarkers that could connect midlife brain aging to later life dementia. I survey the literature with three questions in mind, 1) Does the biomarker index age-related changes across the lifespan? 2) Does the biomarker index cognitive ability and cognitive decline? 3) Is the biomarker sensitive to known risk factors for dementia? I find that while there is preliminary support for some midlife MRI-based biomarkers for accelerated aging, the longitudinal research that would best answer these questions is still in its infancy and needs to be further developed. I conclude with suggestions for future research.

journal_name

Ageing Res Rev

journal_title

Ageing research reviews

authors

Elliott ML

doi

10.1016/j.arr.2020.101075

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

101075

eissn

1568-1637

issn

1872-9649

pii

S1568-1637(19)30408-8

journal_volume

61

pub_type

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