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Issue title: Alzheimer's Disease: Detection, Prevention, and Preclinical Treatment
Guest editors: Jack C. de la Torre
Article type: Review Article
Authors: Wierenga, Christina E.a; b; * | Hays, Chelsea C.a | Zlatar, Zvinka Z.a; b
Affiliations: [a] VA San Diego Healthcare System, San Diego, CA, USA | [b] Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
Correspondence: [*] Correspondence to: Christina E. Wierenga, PhD, VA San Diego Healthcare System, 3350 La Jolla Village Dr., MC 151B, San Diego, CA 92161, USA. Tel.: +1 858 534 8047; Fax: +1 858 642 1218; E-mail: [email protected].
Abstract: There is growing recognition that cerebral hypoperfusion is related to the pathogenesis of Alzheimer's disease (AD), implicating the measurement of cerebral blood flow (CBF) as a possible biomarker of AD. The ability to identify the earliest and most reliable markers of incipient cognitive decline and clinical symptoms is critical to develop effective preventive strategies and interventions for AD. Arterial spin labeling (ASL) magnetic resonance imaging (MRI) measures CBF by magnetically labeling arterial water and using it as an endogenous tracer. Studies using ASL MRI in humans indicate that CBF changes are present several years before the development of the clinical symptoms of AD. Moreover, ASL-measured CBF has been shown to distinguish between cognitively normal individuals, adults at risk for AD, and persons diagnosed with AD. Some studies indicate that CBF may even be sensitive for predicting cognitive decline and conversion to mild cognitive impairment and AD over time. Taken together, evidence suggests that the current staging models of AD biomarker pathology should incorporate early changes in CBF as a useful biomarker, possibly present even earlier than amyloid-β accumulation. Though still a research tool, ASL imaging is a promising non-invasive and reliable method with the potential to serve as a future clinical tool for the measurement of CBF in preclinical AD.
Keywords: Alzheimer's disease, arterial spin labeling, cerebral blood flow, cerebrovascular disorders, cognition, mild cognitive impairment, neuroimaging, neurovascular dysfunction, perfusion
DOI: 10.3233/JAD-141467
Journal: Journal of Alzheimer's Disease, vol. 42, no. s4, pp. S411-S419, 2014
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